Article(id=1217789896496959721, tenantId=1146029695717560320, journalId=1146123166801305609, issueId=1217789884081820362, articleNumber=null, orderNo=null, doi=10.12404/j.issn.1671-1815.2406117, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1723651200000, receivedDateStr=2024-08-15, revisedDate=1744300800000, revisedDateStr=2025-04-11, acceptedDate=null, acceptedDateStr=null, onlineDate=1768273336767, onlineDateStr=2026-01-13, pubDate=1753632000000, pubDateStr=2025-07-28, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1768273336767, onlineIssueDateStr=2026-01-13, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1768273336767, creator=13701087609, updateTime=1768273336767, updator=13701087609, issue=Issue{id=1217789884081820362, tenantId=1146029695717560320, journalId=1146123166801305609, year='2025', volume='25', issue='21', pageStart='8761', pageEnd='9209', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1768273333807, creator=13701087609, updateTime=1768273602927, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1217791012932604619, tenantId=1146029695717560320, journalId=1146123166801305609, issueId=1217789884081820362, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1217791012932604620, tenantId=1146029695717560320, journalId=1146123166801305609, issueId=1217789884081820362, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=9118, endPage=9129, ext={EN=ArticleExt(id=1217789896979304722, articleId=1217789896496959721, tenantId=1146029695717560320, journalId=1146123166801305609, language=EN, title=Excavation Deformation Characteristics and Construction Method Optimisation of Super-large Section Soft Rock Tunnel, columnId=1156262728772735295, journalTitle=Science Technology and Engineering, columnName=Papers·Traffics and Transportations, runingTitle=null, highlight=null, articleAbstract=
The super-large cross-section tunnel is prone to large deformation when passing through soft rock stratum. The reasonable selection of excavation method is of great significance for construction safety. In order to explore the applicability of the double-side nine-step excavation method to the construction of super-large cross-section tunnels, based on a 500 m2 super-large cross-section soft rock tunnel under construction in Chongqing, the mechanical properties of sandy mudstone were revealed by laboratory experiments. The deformation characteristics of surface and super-large cross-section tunnel structures were compared and analyzed by numerical simulation and field monitoring. The excavation sequence, temporary support measures and excavation step length were optimized. The results show that the stress-strain curves of sandy mudstone samples under different confining pressures and different unloading rates are similar, and the triaxial compressive strength and deformation characteristics of rock samples change significantly. With the excavation of the core rock mass of the upper step, the displacement of the super-large section tunnel is abruptly changed. When the temporary support measures are removed, the deformation of the super-large section tunnel is further aggravated. Different excavation steps cause successive disturbance of surrounding rock, resulting in different unloading rates of surrounding rock and affecting the deformation of surface and tunnel structure. The temporary transverse bracing effectively limits the convergence of the arch waist, and the convergence of the arch waist is reduced by about 10.0 mm under all the layout conditions. In addition, the shorter the length of the excavation step, the smaller the deformation of the surface and the super large section tunnel.
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超大断面隧道穿越软岩地层时易产生较大变形,开挖方法的合理选择对于施工安全具有重要的意义。为探究双侧壁九步开挖法对超大断面隧道施工的适用性,依托重庆市500 m2超大断面软岩隧道在建工程,通过开展室内试验揭示砂质泥岩的力学特性,采用数值模拟与现场监测相结合的方法对比分析了地表与超大断面隧道结构的变形特征,并对开挖步序、临时支护措施、开挖台阶长度进行了工法优化分析。结果表明: 不同围压、不同卸荷速率下砂质泥岩岩样应力应变曲线相似,岩样三轴抗压强度及变形特征均发生显著变化。随着上台阶核心岩体的开挖,超大断面隧道洞周位移发生突变,当临时支护措施拆除后,进一步加剧了超大断面隧道变形量。不同开挖步序造成围岩先后扰动,致使围岩卸荷速率不同,影响地表与隧道结构的变形。临时横撑有效限制了拱腰收敛,其全部布设工况减小拱腰收敛量约10.0 mm。此外,开挖台阶长度越短,地表及超大断面隧道变形越小。
, correspAuthors=王培可, authorNote=null, correspAuthorsNote=
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, authorsList=程坤, 徐强, 陈海, 刘新荣, 王培可)}, authors=[Author(id=1217860112845291915, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, orderNo=0, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=715259993@qq.com, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1217860112954343837, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, authorId=1217860112845291915, language=EN, stringName=Kun CHENG, firstName=Kun, middleName=null, lastName=CHENG, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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1 China Water Resources and Hydropower Seventh Engineering Bureau Co., Ltd., Chengdu 611730, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1217860113071784362, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, authorId=1217860112845291915, language=CN, stringName=程坤, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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1 中国水利水电第七工程局有限公司, 成都 611730, bio={"content":"
程坤(1982—),男,汉族,四川渠县人,高级工程师。研究方向:隧道施工。E-mail:715259993@qq.com。
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程坤(1982—),男,汉族,四川渠县人,高级工程师。研究方向:隧道施工。E-mail:715259993@qq.com。
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2 School of Civil Engineering, Chongqing University, Chongqing 400045, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1217860113373774295, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, authorId=1217860113168253371, language=CN, stringName=徐强, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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1 中国水利水电第七工程局有限公司, 成都 611730)])])], keywords=[Keyword(id=1217860115995214476, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=EN, orderNo=1, keyword=tunnel), Keyword(id=1217860116162986654, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=EN, orderNo=2, keyword=soft rock), Keyword(id=1217860116284621480, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=EN, orderNo=3, keyword=super large cross section), Keyword(id=1217860116427227826, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=EN, orderNo=4, keyword=experiment), Keyword(id=1217860116532085437, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=EN, orderNo=5, keyword=deformation), Keyword(id=1217860116645331653, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=EN, orderNo=6, keyword=optimization of construction method), Keyword(id=1217860116750189266, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=CN, orderNo=1, keyword=隧道), Keyword(id=1217860116884407011, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=CN, orderNo=2, keyword=软岩), Keyword(id=1217860117027013359, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=CN, orderNo=3, keyword=超大断面), Keyword(id=1217860117165425401, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=CN, orderNo=4, keyword=试验), Keyword(id=1217860117320614663, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=CN, orderNo=5, keyword=变形), Keyword(id=1217860117454832402, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=CN, orderNo=6, keyword=工法优化)], refs=[Reference(id=1217860128049643856, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, doi=null, pmid=null, pmcid=null, year=2013, volume=null, issue=8, pageStart=105, pageEnd=108, url=null, language=null, rfNumber=[1], rfOrder=0, authorNames=王成, 林森斌, journalName=铁道标准设计, refType=null, unstructuredReference=王成, 林森斌. 浅埋土质大断面隧道下穿高速公路变形控制技术研究[J].
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1 China Water Resources and Hydropower Seventh Engineering Bureau Co., Ltd., Chengdu 611730, China), AuthorCompanyExt(id=1217860112572662119, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, companyId=1217860112551690597, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
1 中国水利水电第七工程局有限公司, 成都 611730)]), AuthorCompany(id=1217860112702685559, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, xref=2, ext=[AuthorCompanyExt(id=1217860112719462779, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, companyId=1217860112702685559, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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2 重庆大学土木工程学院, 重庆 400045)])], figs=[ArticleFig(id=1217860117719073580, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=EN, label=Fig.1, caption=
Super-large section tunnel location diagram, figureFileSmall=SQzpdS3BVhEUkZnfmjy8eQ==, figureFileBig=a/vaQhHtxAxb8t4uNBMqlA==, tableContent=null), ArticleFig(id=1217860117857485626, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=CN, label=图1, caption=
超大断面隧道位置示意图, figureFileSmall=SQzpdS3BVhEUkZnfmjy8eQ==, figureFileBig=a/vaQhHtxAxb8t4uNBMqlA==, tableContent=null), ArticleFig(id=1217860118134309706, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=EN, label=Fig.2, caption=
Excavation step diagram of the double-sidewall nine-step excavation method, figureFileSmall=1bc3ySK7atuXjpF6jgIrVA==, figureFileBig=5hDFhOwThGcYG0acTlx2yw==, tableContent=null), ArticleFig(id=1217860118306276183, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=CN, label=图2, caption=
双侧壁九步开挖法开挖步序图, figureFileSmall=1bc3ySK7atuXjpF6jgIrVA==, figureFileBig=5hDFhOwThGcYG0acTlx2yw==, tableContent=null), ArticleFig(id=1217860118574711652, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=EN, label=Fig.3, caption=
Sandy mudstone rock sample preparation process, figureFileSmall=cxmjgRPLt7Bksy9XZDnBkA==, figureFileBig=ftpCxS8cDuZIoeVvXa2E+w==, tableContent=null), ArticleFig(id=1217860118679569263, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=CN, label=图3, caption=
砂质泥岩岩样制备过程, figureFileSmall=cxmjgRPLt7Bksy9XZDnBkA==, figureFileBig=ftpCxS8cDuZIoeVvXa2E+w==, tableContent=null), ArticleFig(id=1217860118797009786, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=EN, label=Fig.4, caption=
Stress-strain curve and failure mode of sandy mudstone, figureFileSmall=i9G+3dHomQiE9c1/qHsBfw==, figureFileBig=bBmIyb6hFMxjjlYMVNTKDA==, tableContent=null), ArticleFig(id=1217860118927033218, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=CN, label=图4, caption=
砂质泥岩应力应变曲线及破坏形态, figureFileSmall=i9G+3dHomQiE9c1/qHsBfw==, figureFileBig=bBmIyb6hFMxjjlYMVNTKDA==, tableContent=null), ArticleFig(id=1217860119094805385, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=EN, label=Fig.5, caption=
Triaxial unloading stress-strain curves of sandy mudstone under different confining pressures, figureFileSmall=7UtPBVpEoV+ZcU3CjJbvRw==, figureFileBig=/DbfskzB12a8tekA3UVhfA==, tableContent=null), ArticleFig(id=1217860120046912407, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=CN, label=图5, caption=
不同围压砂质泥岩三轴卸荷应力应变曲线, figureFileSmall=7UtPBVpEoV+ZcU3CjJbvRw==, figureFileBig=/DbfskzB12a8tekA3UVhfA==, tableContent=null), ArticleFig(id=1217860120223073182, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=EN, label=Fig.6, caption=
Triaxial unloading stress-strain curves of sandy mudstone with different unloading rates, figureFileSmall=GqAujmkJ7XVnhgFDzyfMow==, figureFileBig=hsOrfLa0JmSOMvd41/kNUA==, tableContent=null), ArticleFig(id=1217860120416011179, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=CN, label=图6, caption=
不同卸荷速率砂质泥岩三轴卸荷应力应变曲线, figureFileSmall=GqAujmkJ7XVnhgFDzyfMow==, figureFileBig=hsOrfLa0JmSOMvd41/kNUA==, tableContent=null), ArticleFig(id=1217860120617337784, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=EN, label=Fig.7, caption=
Three-dimensional numerical simulation model diagram, figureFileSmall=Aw+c/D1B9iXNV+e5n6Zlrg==, figureFileBig=nAFjlsGq4zfmNA1lBkmJRA==, tableContent=null), ArticleFig(id=1217860120793498558, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=CN, label=图7, caption=
三维数值模拟模型图, figureFileSmall=Aw+c/D1B9iXNV+e5n6Zlrg==, figureFileBig=nAFjlsGq4zfmNA1lBkmJRA==, tableContent=null), ArticleFig(id=1217860120969659339, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=EN, label=Fig.8, caption=
Numerical simulation monitoring point layout diagram, figureFileSmall=Pj7OK/guU//fVSrUo1vZEw==, figureFileBig=6VniG/lS1GgcfNUFnEIHJQ==, tableContent=null), ArticleFig(id=1217860121166791638, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=CN, label=图8, caption=
数值模拟监测点布设图, figureFileSmall=Pj7OK/guU//fVSrUo1vZEw==, figureFileBig=6VniG/lS1GgcfNUFnEIHJQ==, tableContent=null), ArticleFig(id=1217860121284232161, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=EN, label=Fig.9, caption=
Numerical simulation and field monitoring of the surface subsidence comparison curve, figureFileSmall=oYHiCSI5s0+MP1L8qonqgA==, figureFileBig=e58Aa1dePRKT66yuYSZt4w==, tableContent=null), ArticleFig(id=1217860121426838508, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=CN, label=图9, caption=
数值模拟与现场监测地表沉降对比曲线, figureFileSmall=oYHiCSI5s0+MP1L8qonqgA==, figureFileBig=e58Aa1dePRKT66yuYSZt4w==, tableContent=null), ArticleFig(id=1217860121594610681, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=EN, label=Fig.10, caption=
Settlement change curve of surface monitoring points with different excavation steps, figureFileSmall=pGFdEF5bfh/CIvh5gOgi2A==, figureFileBig=ShFBqbs22V+uHykeu0tYbA==, tableContent=null), ArticleFig(id=1217860121728827395, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=CN, label=图10, caption=
不同开挖步数地表监测点沉降变化曲线, figureFileSmall=pGFdEF5bfh/CIvh5gOgi2A==, figureFileBig=ShFBqbs22V+uHykeu0tYbA==, tableContent=null), ArticleFig(id=1217860121875628044, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=EN, label=Fig.11, caption=
Vertical displacement curves of the vault and inverted arch under different excavation steps, figureFileSmall=ui1ZAHONcVjAxEIaUcm9qQ==, figureFileBig=QrOnm8qYS5AnA+wTLYIffQ==, tableContent=null), ArticleFig(id=1217860122009845780, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=CN, label=图11, caption=
不同开挖步数下拱顶和仰拱竖向位移变化曲线, figureFileSmall=ui1ZAHONcVjAxEIaUcm9qQ==, figureFileBig=QrOnm8qYS5AnA+wTLYIffQ==, tableContent=null), ArticleFig(id=1217860122110509085, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=EN, label=Fig.12, caption=
Horizontal displacement curve of hance with different excavation steps, figureFileSmall=hlaSnrnr6zU3Rltqs1/yLg==, figureFileBig=1SJWjlgIs32zEaBXIFLLJA==, tableContent=null), ArticleFig(id=1217860122215366695, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=CN, label=图12, caption=
不同开挖步数拱腰水平位移变化曲线, figureFileSmall=hlaSnrnr6zU3Rltqs1/yLg==, figureFileBig=1SJWjlgIs32zEaBXIFLLJA==, tableContent=null), ArticleFig(id=1217860122307641392, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=EN, label=Fig.13, caption=
Schematic diagram of different excavation steps, figureFileSmall=oo5GS1kmaPZsrj+M24oCtw==, figureFileBig=Q6KtjoF1ecNseAwKA5RzNg==, tableContent=null), ArticleFig(id=1217860122555105346, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=CN, label=图13, caption=
不同开挖步序示意图, figureFileSmall=oo5GS1kmaPZsrj+M24oCtw==, figureFileBig=Q6KtjoF1ecNseAwKA5RzNg==, tableContent=null), ArticleFig(id=1217860122693517386, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=EN, label=Fig.14, caption=
Settlement curves of each monitoring point on the surface of different excavation steps, figureFileSmall=VBfQfrkU9cPXXVObh1jIpA==, figureFileBig=kLrPGQfD7f/ATrjRldiJcA==, tableContent=null), ArticleFig(id=1217860122810957906, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=CN, label=图14, caption=
不同开挖步序地表各监测点沉降曲线, figureFileSmall=VBfQfrkU9cPXXVObh1jIpA==, figureFileBig=kLrPGQfD7f/ATrjRldiJcA==, tableContent=null), ArticleFig(id=1217860122949369944, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=EN, label=Fig.15, caption=
Vertical displacement curve of the vault in different excavation steps, figureFileSmall=ayWPXq+d3uwXlPbPUxUACw==, figureFileBig=htLVI7uk8nBOOrGBls+5Hw==, tableContent=null), ArticleFig(id=1217860123096170601, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=CN, label=图15, caption=
不同开挖步序拱顶竖向位移变化曲线, figureFileSmall=ayWPXq+d3uwXlPbPUxUACw==, figureFileBig=htLVI7uk8nBOOrGBls+5Hw==, tableContent=null), ArticleFig(id=1217860123209416818, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=EN, label=Fig.16, caption=
Vertical displacement curve of the arch bottom in different excavation steps, figureFileSmall=40aMkqmMctIi3aS7v4TYCQ==, figureFileBig=ouOcbIYX+8EFySZ5DbRg9w==, tableContent=null), ArticleFig(id=1217860123419132027, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=CN, label=图16, caption=
不同开挖步序拱底竖向位移变化曲线, figureFileSmall=40aMkqmMctIi3aS7v4TYCQ==, figureFileBig=ouOcbIYX+8EFySZ5DbRg9w==, tableContent=null), ArticleFig(id=1217860123578515593, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=EN, label=Fig.17, caption=
Schematic layout of different temporary measures, figureFileSmall=SfPwVKmiDVsQ8+u/Qy3WtA==, figureFileBig=uaJIaoiHIgzgLgQV68Q+Bg==, tableContent=null), ArticleFig(id=1217860123683373200, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=CN, label=图17, caption=
不同临时措施布置示意图, figureFileSmall=SfPwVKmiDVsQ8+u/Qy3WtA==, figureFileBig=uaJIaoiHIgzgLgQV68Q+Bg==, tableContent=null), ArticleFig(id=1217860123758870682, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=EN, label=Fig.18, caption=
Settlement change curve of surface monitoring points under different excavation temporary support measures, figureFileSmall=92EQ8pBX/VGpya9G6qeAaw==, figureFileBig=WfiyDF0cv3WlffhTHbXUlw==, tableContent=null), ArticleFig(id=1217860123851145378, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=CN, label=图18, caption=
不同开挖临时支护措施地表监测点沉降变化曲线, figureFileSmall=92EQ8pBX/VGpya9G6qeAaw==, figureFileBig=WfiyDF0cv3WlffhTHbXUlw==, tableContent=null), ArticleFig(id=1217860123964391592, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=EN, label=Fig.19, caption=
Different excavation temporary support measures arch, waist, horizontal clearance, convergence curve, figureFileSmall=4/qdi5Ke0+LVtpU7iujXmQ==, figureFileBig=ywfmAf8JholTz8GSQcSy4Q==, tableContent=null), ArticleFig(id=1217860125331734704, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=CN, label=图19, caption=
不同开挖临时支护措施拱腰水平净空收敛变化曲线, figureFileSmall=4/qdi5Ke0+LVtpU7iujXmQ==, figureFileBig=ywfmAf8JholTz8GSQcSy4Q==, tableContent=null), ArticleFig(id=1217860125461758135, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=EN, label=Fig.20, caption=
The schematic diagram of the tunnel excavation step length, figureFileSmall=p1f0fGUf8L2kce+v0YdX+g==, figureFileBig=hIQpiN/SxL+4hNYRFI4gTw==, tableContent=null), ArticleFig(id=1217860125583392959, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=CN, label=图20, caption=
隧道开挖台阶长度示意图, figureFileSmall=p1f0fGUf8L2kce+v0YdX+g==, figureFileBig=hIQpiN/SxL+4hNYRFI4gTw==, tableContent=null), ArticleFig(id=1217860125742776517, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=EN, label=Fig.21, caption=
The settlement curve of each monitoring point on the surface of different excavation step lengths, figureFileSmall=l6jtjT6wDI5SR68YaH0HRw==, figureFileBig=JypI9EQTqZoYGecQisAzFg==, tableContent=null), ArticleFig(id=1217860125889577169, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=CN, label=图21, caption=
不同开挖台阶长度地表各监测点沉降变化曲线, figureFileSmall=l6jtjT6wDI5SR68YaH0HRw==, figureFileBig=JypI9EQTqZoYGecQisAzFg==, tableContent=null), ArticleFig(id=1217860126044766427, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=EN, label=Fig.22, caption=
Vertical displacement curve of a vault with different excavation step lengths, figureFileSmall=FEsTKrIvlupBNcevnwjPiw==, figureFileBig=xwEjwQ7koysjPhPTgNeEJw==, tableContent=null), ArticleFig(id=1217860126216732902, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=CN, label=图22, caption=
不同开挖台阶长度拱顶竖向位移变化曲线, figureFileSmall=FEsTKrIvlupBNcevnwjPiw==, figureFileBig=xwEjwQ7koysjPhPTgNeEJw==, tableContent=null), ArticleFig(id=1217860126325784815, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=EN, label=Fig.23, caption=
Vertical displacement curve of arch bottom with different excavation step lengths, figureFileSmall=+00Ug9xqN7BTjLizKBuIbQ==, figureFileBig=JS4RkxWQi0eFHY3CLw334A==, tableContent=null), ArticleFig(id=1217860126485168372, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=CN, label=图23, caption=
不同开挖台阶长度拱底竖向位移变化曲线, figureFileSmall=+00Ug9xqN7BTjLizKBuIbQ==, figureFileBig=JS4RkxWQi0eFHY3CLw334A==, tableContent=null), ArticleFig(id=1217860126577443067, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=EN, label=Table 1, caption=
Mechanical parameters of the stratum and tunnel initial support
, figureFileSmall=null, figureFileBig=null, tableContent=
材料 名称 | 弹性模 量/GPa | 重度/ (kN·m-3) | 泊松比 | 黏聚力/ kPa | 内摩擦角/ (°) |
| 填土 | 0.02 | 19.5 | 0.30 | 5 | 25 |
| 砂岩 | 4.20 | 24.8 | 0.17 | 1 500 | 36 |
砂质 泥岩 | 1.02 | 25.5 | 0.22 | 380 | 32 |
喷射 混凝土 | 0.028 | 24.0 | 0.28 | — | — |
| 锚杆 | 206.00 | 78.5 | 0.23 | — | — |
| 钢拱架 | 210.00 | 78.5 | 0.20 | — | — |
), ArticleFig(id=1217860126724243715, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=CN, label=表1, caption=
地层与隧道初支力学参数
, figureFileSmall=null, figureFileBig=null, tableContent=
材料 名称 | 弹性模 量/GPa | 重度/ (kN·m-3) | 泊松比 | 黏聚力/ kPa | 内摩擦角/ (°) |
| 填土 | 0.02 | 19.5 | 0.30 | 5 | 25 |
| 砂岩 | 4.20 | 24.8 | 0.17 | 1 500 | 36 |
砂质 泥岩 | 1.02 | 25.5 | 0.22 | 380 | 32 |
喷射 混凝土 | 0.028 | 24.0 | 0.28 | — | — |
| 锚杆 | 206.00 | 78.5 | 0.23 | — | — |
| 钢拱架 | 210.00 | 78.5 | 0.20 | — | — |
), ArticleFig(id=1217860126858461450, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=EN, label=Table 2, caption=
The change in surface subsidence value in different excavation steps
, figureFileSmall=null, figureFileBig=null, tableContent=
| 开挖步序工况 | 地表沉降值/mm |
| 土体开挖完成 | 临时措施拆除 |
| 开挖步序1 | -22.30 | -28.50 |
| 开挖步序2 | -21.58 | -27.16 |
| 开挖步序3 | -21.18 | -26.50 |
| 开挖步序4 | -21.00 | -25.36 |
), ArticleFig(id=1217860127038816531, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=CN, label=表2, caption=
不同开挖步序地表沉降值变化
, figureFileSmall=null, figureFileBig=null, tableContent=
| 开挖步序工况 | 地表沉降值/mm |
| 土体开挖完成 | 临时措施拆除 |
| 开挖步序1 | -22.30 | -28.50 |
| 开挖步序2 | -21.58 | -27.16 |
| 开挖步序3 | -21.18 | -26.50 |
| 开挖步序4 | -21.00 | -25.36 |
), ArticleFig(id=1217860127177228572, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=EN, label=Table 3, caption=
The surface settlement value of different excavation temporary supports
, figureFileSmall=null, figureFileBig=null, tableContent=
| 临时横撑工况 | 地表沉降值/mm |
| 土体开挖完成 | 临时措施拆除 |
| 临时横撑1 | -20.60 | -25.30 |
| 临时横撑2 | -22.00 | -26.30 |
| 临时横撑3 | -20.00 | -24.20 |
), ArticleFig(id=1217860127340806436, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=CN, label=表3, caption=
不同开挖临时横撑地表沉降值
, figureFileSmall=null, figureFileBig=null, tableContent=
| 临时横撑工况 | 地表沉降值/mm |
| 土体开挖完成 | 临时措施拆除 |
| 临时横撑1 | -20.60 | -25.30 |
| 临时横撑2 | -22.00 | -26.30 |
| 临时横撑3 | -20.00 | -24.20 |
), ArticleFig(id=1217860127454052650, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=EN, label=Table 4, caption=
The change in surface subsidence value with different step lengths
, figureFileSmall=null, figureFileBig=null, tableContent=
| 台阶长度/m | 地表沉降值/mm |
| 土体开挖完成 | 临时措施拆除 |
| 5 | -20.60 | -25.30 |
| 10 | -21.56 | -26.90 |
| 15 | -22.90 | -28.00 |
| 20 | -24.00 | -29.00 |
), ArticleFig(id=1217860127563104560, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1217789896496959721, language=CN, label=表4, caption=
不同台阶长度地表沉降值变化
, figureFileSmall=null, figureFileBig=null, tableContent=
| 台阶长度/m | 地表沉降值/mm |
| 土体开挖完成 | 临时措施拆除 |
| 5 | -20.60 | -25.30 |
| 10 | -21.56 | -26.90 |
| 15 | -22.90 | -28.00 |
| 20 | -24.00 | -29.00 |
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