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To study the effect of anchor length on anchorage effect of weak rock masses in a deep tunnel, the indoor similar model tests were carried out on failure test of rock masses during the excavation opening. The variation characteristic on the failure, displacements and stress of the rock mass after excavation were analyzed comparatively under three conditions (without anchors, with short anchors and long anchors).In the loading test, the failure process of rock mass around the opening shows that the failure process of surrounding rock occurs first at the side wall, then the arch waist and the arch collapse. The surrounding rock in the arch roof after reinforcing rock bolts forms the effect of strengthening beam because of the reinforcement of rock bolts, which leads to the significant increase in the maximum settlement and failure load of the arch roof. The length of rock bolts need to pass through the plastic loosening zone of the arch roof. If the length of anchor rod is not enough to anchor the whole plastic loosening zone, there will be stratification between the anchored surrounding rock and the unanchored surrounding rock. Based on the theory of homogenization strength of rock mass, the short bolt mainly increases the effective support force of surrounding rock at shallow tunnel wall, thus improving the strength of surrounding rock, and the long bolt (cable) can regulate the stress in the elastic zone of deep surrounding rock. Therefore, the combination of the long bolt (cable) effectively regulates the stress state of surrounding rock.
, correspAuthors=Feng-yun WANG, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, authorCompany=null, fund=null, authors=null, authorsList=Feng-yun WANG, Rui PAN, Yi CAI, Li-qing NIE, Yong-xiang CAI, Min-jun TANG), CN=ArticleExt(id=1156264370012278983, articleId=1156264261216227961, tenantId=1146029695717560320, journalId=1146123166801305609, language=CN, title=深埋隧道长短锚杆锚固围岩破坏模型试验, columnId=1156262730517565784, journalTitle=科学技术与工程, columnName=论文·建筑科学, runingTitle=null, highlight=null, articleAbstract=
为研究长短锚杆对深埋隧道软弱围岩锚固效果的影响,通过室内相似模型试验,开展隧道开挖后围岩的加载破坏试验,对比分析3种工况下(无锚、短锚和长锚)围岩破坏、变形和应力变化规律。结果表明:加载开挖隧道后的围岩,其破坏顺序表现为边墙和拱腰依次剪切破坏,最后拱顶塌陷;锚固后的围岩拱顶由于锚杆的锚固作用形成了“加强梁”的作用,使拱顶承受的最大沉降及其破坏荷载显著增加;锚杆的长度需要穿过拱顶塑性松动区,若锚杆长度不足以锚固整个塑性松动区,被锚固的围岩与上部未被锚固的围岩之间存在“分层”现象。根据锚固围岩强度均一化理论得到,短锚杆主要是增加浅层洞壁处围岩的有效支护力,从而提高了洞壁处围岩强度,长锚杆主要是调节深部围岩弹性区应力状态,长短锚杆组合使用可有效调节围岩应力状态。
, correspAuthors=王凤云, authorNote=null, correspAuthorsNote=
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, authorsList=王凤云, 潘锐, 蔡毅, 聂利青, 蔡永祥, 唐民军)}, authors=[Author(id=1233507640849002595, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, orderNo=0, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=fengyunwang_sc@sina.com, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1233507640941277287, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, authorId=1233507640849002595, language=EN, stringName=Feng-yun WANG, firstName=Feng-yun, middleName=null, lastName=WANG, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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1 Anhui Provincial Key Laboratory of Intelligent Underground Detection, Anhui Jianzhu University, Hefei 230601, China
2 School of Civil Engineering, Anhui Jianzhu University, Hefei 230601, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1233507641033551976, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, authorId=1233507640849002595, language=CN, stringName=王凤云, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, 2, address=
1 安徽建筑大学安徽省智能地下探测重点实验室, 合肥 230601
2 安徽建筑大学土木工程学院, 合肥 230601, bio={"content":"
王凤云(1989—),女,汉族,安徽无为人,博士,讲师,硕士研究生导师。研究方向:地下工程围岩稳定性。E-mail:fengyunwang_sc@sina.com。
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王凤云(1989—),女,汉族,安徽无为人,博士,讲师,硕士研究生导师。研究方向:地下工程围岩稳定性。E-mail:fengyunwang_sc@sina.com。
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1 Anhui Provincial Key Laboratory of Intelligent Underground Detection, Anhui Jianzhu University, Hefei 230601, China), AuthorCompanyExt(id=1233507640647675997, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, companyId=1233507640635093083, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
1 安徽建筑大学安徽省智能地下探测重点实验室, 合肥 230601)]), AuthorCompany(id=1233507640714784862, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, xref=2, ext=[AuthorCompanyExt(id=1233507640723173471, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, companyId=1233507640714784862, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
2 School of Civil Engineering, Anhui Jianzhu University, Hefei 230601, China), AuthorCompanyExt(id=1233507640781893728, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, companyId=1233507640714784862, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
2 安徽建筑大学土木工程学院, 合肥 230601)])]), Author(id=1233507641096466538, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, orderNo=1, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=null, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1233507641176158316, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, authorId=1233507641096466538, language=EN, stringName=Rui PAN, firstName=Rui, middleName=null, lastName=PAN, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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2 School of Civil Engineering, Anhui Jianzhu University, Hefei 230601, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1233507641239072877, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, authorId=1233507641096466538, language=CN, stringName=潘锐, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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2 安徽建筑大学土木工程学院, 合肥 230601, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1233507640714784862, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, xref=2, ext=[AuthorCompanyExt(id=1233507640723173471, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, companyId=1233507640714784862, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
2 School of Civil Engineering, Anhui Jianzhu University, Hefei 230601, China), AuthorCompanyExt(id=1233507640781893728, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, companyId=1233507640714784862, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
2 安徽建筑大学土木工程学院, 合肥 230601)])]), Author(id=1233507641306181743, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, orderNo=2, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=null, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1233507641390067826, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, authorId=1233507641306181743, language=EN, stringName=Yi CAI, firstName=Yi, middleName=null, lastName=CAI, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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1 Anhui Provincial Key Laboratory of Intelligent Underground Detection, Anhui Jianzhu University, Hefei 230601, China
2 School of Civil Engineering, Anhui Jianzhu University, Hefei 230601, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1233507641457176691, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, authorId=1233507641306181743, language=CN, stringName=蔡毅, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, 2, address=
1 安徽建筑大学安徽省智能地下探测重点实验室, 合肥 230601
2 安徽建筑大学土木工程学院, 合肥 230601, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1233507640635093083, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, xref=1, ext=[AuthorCompanyExt(id=1233507640639287388, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, companyId=1233507640635093083, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
1 Anhui Provincial Key Laboratory of Intelligent Underground Detection, Anhui Jianzhu University, Hefei 230601, China), AuthorCompanyExt(id=1233507640647675997, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, companyId=1233507640635093083, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
1 安徽建筑大学安徽省智能地下探测重点实验室, 合肥 230601)]), AuthorCompany(id=1233507640714784862, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, xref=2, ext=[AuthorCompanyExt(id=1233507640723173471, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, companyId=1233507640714784862, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
2 School of Civil Engineering, Anhui Jianzhu University, Hefei 230601, China), AuthorCompanyExt(id=1233507640781893728, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, companyId=1233507640714784862, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
2 安徽建筑大学土木工程学院, 合肥 230601)])]), Author(id=1233507641520091253, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, orderNo=3, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=null, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1233507641603977336, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, authorId=1233507641520091253, language=EN, stringName=Li-qing NIE, firstName=Li-qing, middleName=null, lastName=NIE, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, 2, address=
1 Anhui Provincial Key Laboratory of Intelligent Underground Detection, Anhui Jianzhu University, Hefei 230601, China
2 School of Civil Engineering, Anhui Jianzhu University, Hefei 230601, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1233507641679474809, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, authorId=1233507641520091253, language=CN, stringName=聂利青, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, 2, address=
1 安徽建筑大学安徽省智能地下探测重点实验室, 合肥 230601
2 安徽建筑大学土木工程学院, 合肥 230601, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1233507640635093083, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, xref=1, ext=[AuthorCompanyExt(id=1233507640639287388, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, companyId=1233507640635093083, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
1 Anhui Provincial Key Laboratory of Intelligent Underground Detection, Anhui Jianzhu University, Hefei 230601, China), AuthorCompanyExt(id=1233507640647675997, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, companyId=1233507640635093083, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
1 安徽建筑大学安徽省智能地下探测重点实验室, 合肥 230601)]), AuthorCompany(id=1233507640714784862, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, xref=2, ext=[AuthorCompanyExt(id=1233507640723173471, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, companyId=1233507640714784862, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
2 School of Civil Engineering, Anhui Jianzhu University, Hefei 230601, China), AuthorCompanyExt(id=1233507640781893728, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, companyId=1233507640714784862, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
2 安徽建筑大学土木工程学院, 合肥 230601)])]), Author(id=1233507641750777979, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, orderNo=4, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=null, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1233507641826275454, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, authorId=1233507641750777979, language=EN, stringName=Yong-xiang CAI, firstName=Yong-xiang, middleName=null, lastName=CAI, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, 2, address=
1 Anhui Provincial Key Laboratory of Intelligent Underground Detection, Anhui Jianzhu University, Hefei 230601, China
2 School of Civil Engineering, Anhui Jianzhu University, Hefei 230601, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1233507641889190015, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, authorId=1233507641750777979, language=CN, stringName=蔡永祥, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, 2, address=
1 安徽建筑大学安徽省智能地下探测重点实验室, 合肥 230601
2 安徽建筑大学土木工程学院, 合肥 230601, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1233507640635093083, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, xref=1, ext=[AuthorCompanyExt(id=1233507640639287388, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, companyId=1233507640635093083, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
1 Anhui Provincial Key Laboratory of Intelligent Underground Detection, Anhui Jianzhu University, Hefei 230601, China), AuthorCompanyExt(id=1233507640647675997, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, companyId=1233507640635093083, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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1 Anhui Provincial Key Laboratory of Intelligent Underground Detection, Anhui Jianzhu University, Hefei 230601, China), AuthorCompanyExt(id=1233507640647675997, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, companyId=1233507640635093083, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
1 安徽建筑大学安徽省智能地下探测重点实验室, 合肥 230601)]), AuthorCompany(id=1233507640714784862, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, xref=2, ext=[AuthorCompanyExt(id=1233507640723173471, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, companyId=1233507640714784862, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
2 School of Civil Engineering, Anhui Jianzhu University, Hefei 230601, China), AuthorCompanyExt(id=1233507640781893728, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, companyId=1233507640714784862, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
2 安徽建筑大学土木工程学院, 合肥 230601)])], figs=[ArticleFig(id=1233507643227173008, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, language=EN, label=Fig.1, caption=
The size of tunnel section, figureFileSmall=1O5GOtTPfUocRQKaABFhpg==, figureFileBig=8CCEM6xNMewmxlCVX3u74A==, tableContent=null), ArticleFig(id=1233507643298476177, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, language=CN, label=图1, caption=
隧道断面尺寸, figureFileSmall=1O5GOtTPfUocRQKaABFhpg==, figureFileBig=8CCEM6xNMewmxlCVX3u74A==, tableContent=null), ArticleFig(id=1233507643399139474, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, language=EN, label=Fig.2, caption=
The steps for the production of the model box, figureFileSmall=k8qzsSji6V/31vGgH6vZPQ==, figureFileBig=0y/Hasgbr/uAqo/5vwzFaw==, tableContent=null), ArticleFig(id=1233507644737122451, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, language=CN, label=图2, caption=
试验模型制作的步骤, figureFileSmall=k8qzsSji6V/31vGgH6vZPQ==, figureFileBig=0y/Hasgbr/uAqo/5vwzFaw==, tableContent=null), ArticleFig(id=1233507644825202836, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, language=EN, label=Fig.3, caption=
The monitoring layout, figureFileSmall=TJnd/iBHByZvZyG2qT3qFg==, figureFileBig=GT5Wxnq06qE8G73eYV6AoA==, tableContent=null), ArticleFig(id=1233507644925866133, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, language=CN, label=图3, caption=
监测布置图, figureFileSmall=TJnd/iBHByZvZyG2qT3qFg==, figureFileBig=GT5Wxnq06qE8G73eYV6AoA==, tableContent=null), ArticleFig(id=1233507645051695254, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, language=EN, label=Fig.4, caption=
The failure process of rock without bolt after tunnel excavation under loading, figureFileSmall=savsyxRnQsS5mIGELt7X4Q==, figureFileBig=bo2kX2m1ALW+D3+Yp3VheQ==, tableContent=null), ArticleFig(id=1233507645139775639, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, language=CN, label=图4, caption=
开挖隧洞后的无锚围岩受载后破坏过程, figureFileSmall=savsyxRnQsS5mIGELt7X4Q==, figureFileBig=bo2kX2m1ALW+D3+Yp3VheQ==, tableContent=null), ArticleFig(id=1233507645211078808, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, language=EN, label=Fig.5, caption=
The failure of rock mass with long bolt anchorage, figureFileSmall=4RFq4zzTq19xhJQk4nAkoQ==, figureFileBig=ghI7EutHiCPQHxpndy3TWw==, tableContent=null), ArticleFig(id=1233507645290770585, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, language=CN, label=图5, caption=
长锚杆锚固后的围岩受载后破坏, figureFileSmall=4RFq4zzTq19xhJQk4nAkoQ==, figureFileBig=ghI7EutHiCPQHxpndy3TWw==, tableContent=null), ArticleFig(id=1233507645366268058, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, language=EN, label=Fig.6, caption=
The failure of bolt anchorage, figureFileSmall=8p/O7aAI5SDGMgDQKwZKKw==, figureFileBig=CBYOLASxrdQjPl2Yq+r48A==, tableContent=null), ArticleFig(id=1233507645441765531, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, language=CN, label=图6, caption=
锚杆受载后破坏图, figureFileSmall=8p/O7aAI5SDGMgDQKwZKKw==, figureFileBig=CBYOLASxrdQjPl2Yq+r48A==, tableContent=null), ArticleFig(id=1233507645525651612, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, language=EN, label=Fig.7, caption=
The settlement deformation of tunnel surrounding rock, figureFileSmall=phpSyB53bhPXfoLWWkmUpw==, figureFileBig=r8JkIezqqPq4Y/7MwX1K2A==, tableContent=null), ArticleFig(id=1233507645601149085, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, language=CN, label=图7, caption=
隧道围岩沉降变形, figureFileSmall=phpSyB53bhPXfoLWWkmUpw==, figureFileBig=r8JkIezqqPq4Y/7MwX1K2A==, tableContent=null), ArticleFig(id=1233507645664063646, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, language=EN, label=Fig.8, caption=
Radial stress of rock under three conditions, figureFileSmall=lPDH8nHXF2Wdu2WpDABd2A==, figureFileBig=8bpZVINVUYK4hob/CMh6cA==, tableContent=null), ArticleFig(id=1233507645726978207, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, language=CN, label=图8, caption=
3种工况下围岩径向应力变化图, figureFileSmall=lPDH8nHXF2Wdu2WpDABd2A==, figureFileBig=8bpZVINVUYK4hob/CMh6cA==, tableContent=null), ArticleFig(id=1233507645785698464, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, language=EN, label=Fig.9, caption=
Tangential stress of rock under three conditions, figureFileSmall=JHGDlHXebkEOvfiwSFw5yw==, figureFileBig=oe0+BFURBXke/gZGoJcdBg==, tableContent=null), ArticleFig(id=1233507645848613025, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, language=CN, label=图9, caption=
三种工况下围岩切向应力变化图, figureFileSmall=JHGDlHXebkEOvfiwSFw5yw==, figureFileBig=oe0+BFURBXke/gZGoJcdBg==, tableContent=null), ArticleFig(id=1233507645907333282, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, language=EN, label=Fig.10, caption=
Anchor bolt anchor bearing ring, figureFileSmall=tHxf15ZTdfYh0L+KhyvoQw==, figureFileBig=ZOW1RsCOcoP6vF6Nh8Im+g==, tableContent=null), ArticleFig(id=1233507645974442147, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, language=CN, label=图10, caption=
锚杆锚固承载环, figureFileSmall=tHxf15ZTdfYh0L+KhyvoQw==, figureFileBig=ZOW1RsCOcoP6vF6Nh8Im+g==, tableContent=null), ArticleFig(id=1233507646049939620, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, language=EN, label=Fig.11, caption=
anchorage range sketch of short bolt, figureFileSmall=MF736rCXj375GtMi0Z2zag==, figureFileBig=omGiWvw64PiwZUsWFVMBpw==, tableContent=null), ArticleFig(id=1233507646121242789, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, language=CN, label=图11, caption=
锚杆的锚固范围示意图, figureFileSmall=MF736rCXj375GtMi0Z2zag==, figureFileBig=omGiWvw64PiwZUsWFVMBpw==, tableContent=null), ArticleFig(id=1233507646192545958, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, language=EN, label=Fig.12, caption=
support system of long and short rockbolts, figureFileSmall=AM4OmQ7r5YAa/oL3Ave4MQ==, figureFileBig=dVFhllvGrq3OSiJwir3KMg==, tableContent=null), ArticleFig(id=1233507646268043431, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, language=CN, label=图12, caption=
长短锚杆支护体系, figureFileSmall=AM4OmQ7r5YAa/oL3Ave4MQ==, figureFileBig=dVFhllvGrq3OSiJwir3KMg==, tableContent=null), ArticleFig(id=1233507646330957992, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, language=EN, label=Fig.13, caption=
equivalent radius and equivalent support force under different bolt lengths, figureFileSmall=1BqB3brV7avCq8I9fZUMHA==, figureFileBig=vYplTB+7+NMV3EnRoXK6Tw==, tableContent=null), ArticleFig(id=1233507646398066857, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, language=CN, label=图13, caption=
不同锚杆长度下的隧道等效半径和等效支护力, figureFileSmall=1BqB3brV7avCq8I9fZUMHA==, figureFileBig=vYplTB+7+NMV3EnRoXK6Tw==, tableContent=null), ArticleFig(id=1233507646477758634, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, language=EN, label=Fig.14, caption=
effect of bolt lengths on equivalent plastic radius, figureFileSmall=3Q3auzBXkQsRQ6Utz4pbag==, figureFileBig=AtQ6wSp6EbvWoN1bEE9JWA==, tableContent=null), ArticleFig(id=1233507646549061803, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, language=CN, label=图14, caption=
不同锚杆长度对锚固围岩等效塑性半径的影响, figureFileSmall=3Q3auzBXkQsRQ6Utz4pbag==, figureFileBig=AtQ6wSp6EbvWoN1bEE9JWA==, tableContent=null), ArticleFig(id=1233507646616170668, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, language=EN, label=Table 1, caption=
The mechanics parameters of rock masses
, figureFileSmall=null, figureFileBig=null, tableContent=
| Ⅳ级 | γ/ (kN·m-3) | E/ GPa | ν | c/ MPa | $\varphi $/(°) |
| 原型 | 20~25 | 1.3~6.0 | 0.3~0.35 | 0.2~0.7 | 27~39 |
| 模型 | 20~25 | 0.026~0.12 | 0.3~0.35 | 0.004~0.014 | 27~39 |
), ArticleFig(id=1233507646691668141, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, language=CN, label=表1, caption=
围岩的力学参数
, figureFileSmall=null, figureFileBig=null, tableContent=
| Ⅳ级 | γ/ (kN·m-3) | E/ GPa | ν | c/ MPa | $\varphi $/(°) |
| 原型 | 20~25 | 1.3~6.0 | 0.3~0.35 | 0.2~0.7 | 27~39 |
| 模型 | 20~25 | 0.026~0.12 | 0.3~0.35 | 0.004~0.014 | 27~39 |
), ArticleFig(id=1233507646767165614, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, language=EN, label=Table 2, caption=
The comparison analysis of failure load and crown settlement under three conditions
, figureFileSmall=null, figureFileBig=null, tableContent=
| 工况 | 边墙破 坏/kN | 拱腰破 坏/kN | 拱顶破 坏/kN | 拱顶最终 沉降量/mm |
| 无锚 | 1.0 | 2.0 | 3.2 | 39 |
| 短锚 | 2.4 | 3.8 | 4.9 | 41 |
| 长锚 | 3.0 | 4.5 | 5.5 | 50 |
), ArticleFig(id=1233507646834274479, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, language=CN, label=表2, caption=
3种工况下破坏荷载和拱顶沉降对比分析
, figureFileSmall=null, figureFileBig=null, tableContent=
| 工况 | 边墙破 坏/kN | 拱腰破 坏/kN | 拱顶破 坏/kN | 拱顶最终 沉降量/mm |
| 无锚 | 1.0 | 2.0 | 3.2 | 39 |
| 短锚 | 2.4 | 3.8 | 4.9 | 41 |
| 长锚 | 3.0 | 4.5 | 5.5 | 50 |
), ArticleFig(id=1233507646905577648, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, language=EN, label=Table 3, caption=
The calculated parameters of rock mass and bolts[19]
, figureFileSmall=null, figureFileBig=null, tableContent=
围岩 参数 | E/ MPa | σc/ MPa | cp/ MPa | ${\varphi }^{\mathrm{p}}$/ (°) | cr/ MPa | ${\varphi }^{\mathrm{r}}$/(°) |
| 5 000 | 50 | 0.276 | 35 | 0.276 | 35 |
锚杆 参数 | Lb/ m | s11/ mm | sr1/ mm | rb/ mm | Eb/ MPa | |
| 2.4 | 800 | 800 | 22 | 200 000 | |
锚固体 参数 | E*/ MPa | c*/ MPa | ${\varphi }^{\mathrm{*}}$/(°) | | | |
| 5 463 | 0.301 | 33.9 | | | |
), ArticleFig(id=1233507646985269425, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, language=CN, label=表3, caption=
围岩与锚杆计算参数[19]
, figureFileSmall=null, figureFileBig=null, tableContent=
围岩 参数 | E/ MPa | σc/ MPa | cp/ MPa | ${\varphi }^{\mathrm{p}}$/ (°) | cr/ MPa | ${\varphi }^{\mathrm{r}}$/(°) |
| 5 000 | 50 | 0.276 | 35 | 0.276 | 35 |
锚杆 参数 | Lb/ m | s11/ mm | sr1/ mm | rb/ mm | Eb/ MPa | |
| 2.4 | 800 | 800 | 22 | 200 000 | |
锚固体 参数 | E*/ MPa | c*/ MPa | ${\varphi }^{\mathrm{*}}$/(°) | | | |
| 5 463 | 0.301 | 33.9 | | | |
), ArticleFig(id=1233507647056572594, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, language=EN, label=Table 4, caption=
The calculated parameters under different bolt lengths
, figureFileSmall=null, figureFileBig=null, tableContent=
| 锚杆长度Lb/m | 1.2 | 2.4 | 3.6 | 4.8 | 6.0 |
| 锚固厚度b/m | 0.865 | 1.939 | 3.014 | 4.088 | 5.162 |
| 等效半径(R0+b)/m | 2.865 | 3.939 | 5.014 | 6.088 | 7.162 |
| 等效支护力pib/MPa(pi=0) | 0.342 | 0.558 | 0.681 | 0.761 | 0.816 |
), ArticleFig(id=1233507647123681459, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156264261216227961, language=CN, label=表4, caption=
不同锚杆长度下的计算参数
, figureFileSmall=null, figureFileBig=null, tableContent=
| 锚杆长度Lb/m | 1.2 | 2.4 | 3.6 | 4.8 | 6.0 |
| 锚固厚度b/m | 0.865 | 1.939 | 3.014 | 4.088 | 5.162 |
| 等效半径(R0+b)/m | 2.865 | 3.939 | 5.014 | 6.088 | 7.162 |
| 等效支护力pib/MPa(pi=0) | 0.342 | 0.558 | 0.681 | 0.761 | 0.816 |
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