Article(id=1236333411917427650, tenantId=1146029695717560320, journalId=1235980550691926019, issueId=1236333405122646435, articleNumber=null, orderNo=null, doi=10.3969/j.issn.0253-6099.2023.01.003, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1661443200000, receivedDateStr=2022-08-26, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1772694455365, onlineDateStr=2026-03-05, pubDate=1675180800000, pubDateStr=2023-02-01, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1772694455365, onlineIssueDateStr=2026-03-05, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1772694455365, creator=13701087609, updateTime=1772694455365, updator=13701087609, issue=Issue{id=1236333405122646435, tenantId=1146029695717560320, journalId=1235980550691926019, year='2023', volume='43', issue='1', pageStart='1', pageEnd='159', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1772694453745, creator=13701087609, updateTime=1772694772892, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1236334743785099547, tenantId=1146029695717560320, journalId=1235980550691926019, issueId=1236333405122646435, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1236334743785099548, tenantId=1146029695717560320, journalId=1235980550691926019, issueId=1236333405122646435, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=12, endPage=15, ext={EN=ArticleExt(id=1236333412244583375, articleId=1236333411917427650, tenantId=1146029695717560320, journalId=1235980550691926019, language=EN, title=Seepage Characteristics of Slope at Tunnel Entrance Under Heavy Rainfall and Its Support Scheme, columnId=1236276106018484431, journalTitle=Mining and Metallurgical Engineering, columnName=MINING, runingTitle=null, highlight=null, articleAbstract=

It is difficult to simulate and analyze distribution of seepage field for the slope at the entrance of excavated tunnel during heavy rainfall. Aiming this problem, a slope project at a tunnel entrance was taken for study, and FISH language in the FLAC3D was redeveloped to determine the permeability coefficient of soil under different saturation state during rainfall infiltration, and the boundary conditions for rainfall infiltration were updated in real time. In addition, the pore water pressure, matrix suction distribution, as well as safety and stability of the slope at the tunnel entrance after different support schemes were all analyzed with different rainfall durations. The results showed that after 24 hours of heavy rainfall, the slope before and after a combined support including anti-slide piles and anchor cables all reached saturation state, that is, the saturation line ran through from the foot to the crest of the slope, while the slope, after benching and being supported with bolt, had its surface soil from the foot to the secondary platform of the slope under a saturated state. As for the slope at tunnel entrance supported by anti-slide pile combined with anchor cable, the variation law of its safety factor during rainfall was consistent with that of the slope without support treatment, showing that the factor of safety tended to be stable after an initial rapid decrease, and gradually reached 1.2. As for the slope after benching and being support with bolt, its factor of safety decreased a little and maintained above 1.8. It is concluded that the factor of safety, excavated earthwork quantity and total investment for the support scheme should be taken into consideration before starting a slope engineering at a tunnel entrance, and a combined support scheme including anti-slide pile and anchor cable is superior to the scheme including benching and support with bolt.

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针对数值模拟软件难以模拟分析强降雨过程中隧道洞口边坡开挖渗流场分布的问题,依托某隧道洞口边坡工程,对FLAC3D软件中的FISH语言进行二次开发,确定降雨渗透过程中不同饱和状态下土体渗透系数值并实时更新降雨入渗的边界条件,分析了不同降雨时长情况下不同支护方案隧道洞口边坡孔隙水压力、基质吸力分布以及安全稳定性。结果表明,历经24 h强降雨,原边坡和采用抗滑桩+锚索支护的边坡表面土体均达到饱和状态,即从坡脚至坡顶浸润线形成贯通;而采用台阶型放坡+锚杆支护的边坡仅在坡脚至边坡二级平台处的表面土体达到饱和状态;降雨过程中采用抗滑桩+锚索支护的隧道洞口边坡与原边坡安全系数的变化规律较为一致,安全系数均为先快速降低后逐渐趋于稳定,直至安全系数达到1.2;而采用台阶型放坡+锚杆支护的边坡安全系数降低幅度较小,其值基本保持在1.8以上;在选择隧道洞口边坡工程扩建方案时,从隧道洞口边坡工程开挖支护方案的安全系数、土方开挖量、总投资等多个角度考虑,抗滑桩+锚索支护方式优于台阶型放坡+锚杆支护方式。

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蔡军(1988—),男,江西抚州人,讲师,主要从事防灾减灾及防护工程方向的教学与研究工作。
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谢韬(1981—),男,湖南邵东人,高级工程师,主要从事市政道路与公路的设计与研究工作。

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谢韬(1981—),男,湖南邵东人,高级工程师,主要从事市政道路与公路的设计与研究工作。

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谢韬(1981—),男,湖南邵东人,高级工程师,主要从事市政道路与公路的设计与研究工作。

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强降雨条件下隧道洞口边坡开挖渗流特征以及支护方案研究
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谢韬 1 , 蔡军 2 , 范理云 2 , 许胜才 2
矿冶工程杂志 | 采矿 2023,43(1): 12-15
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矿冶工程杂志 | 采矿 2023, 43(1): 12-15
强降雨条件下隧道洞口边坡开挖渗流特征以及支护方案研究
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谢韬1, 蔡军2, 范理云2, 许胜才2
作者信息
  • 1.广西交通设计集团,广西 南宁 530029
  • 2.贺州学院,广西 贺州 542899
  • 谢韬(1981—),男,湖南邵东人,高级工程师,主要从事市政道路与公路的设计与研究工作。

通讯作者:

蔡军(1988—),男,江西抚州人,讲师,主要从事防灾减灾及防护工程方向的教学与研究工作。
Seepage Characteristics of Slope at Tunnel Entrance Under Heavy Rainfall and Its Support Scheme
Tao XIE1, Jun CAI2, Liyun FAN2, Shengcai XU2
Affiliations
  • 1.Guangxi Communications Design Group Co Ltd, Nanning 530029, Guangxi, China
  • 2.Hezhou University, Hezhou 542899, Guangxi, China
出版时间: 2023-02-01 doi: 10.3969/j.issn.0253-6099.2023.01.003
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针对数值模拟软件难以模拟分析强降雨过程中隧道洞口边坡开挖渗流场分布的问题,依托某隧道洞口边坡工程,对FLAC3D软件中的FISH语言进行二次开发,确定降雨渗透过程中不同饱和状态下土体渗透系数值并实时更新降雨入渗的边界条件,分析了不同降雨时长情况下不同支护方案隧道洞口边坡孔隙水压力、基质吸力分布以及安全稳定性。结果表明,历经24 h强降雨,原边坡和采用抗滑桩+锚索支护的边坡表面土体均达到饱和状态,即从坡脚至坡顶浸润线形成贯通;而采用台阶型放坡+锚杆支护的边坡仅在坡脚至边坡二级平台处的表面土体达到饱和状态;降雨过程中采用抗滑桩+锚索支护的隧道洞口边坡与原边坡安全系数的变化规律较为一致,安全系数均为先快速降低后逐渐趋于稳定,直至安全系数达到1.2;而采用台阶型放坡+锚杆支护的边坡安全系数降低幅度较小,其值基本保持在1.8以上;在选择隧道洞口边坡工程扩建方案时,从隧道洞口边坡工程开挖支护方案的安全系数、土方开挖量、总投资等多个角度考虑,抗滑桩+锚索支护方式优于台阶型放坡+锚杆支护方式。

强降雨  /  边坡支护  /  隧道洞口  /  边坡工程  /  非饱和土  /  渗透系数  /  基质吸力

It is difficult to simulate and analyze distribution of seepage field for the slope at the entrance of excavated tunnel during heavy rainfall. Aiming this problem, a slope project at a tunnel entrance was taken for study, and FISH language in the FLAC3D was redeveloped to determine the permeability coefficient of soil under different saturation state during rainfall infiltration, and the boundary conditions for rainfall infiltration were updated in real time. In addition, the pore water pressure, matrix suction distribution, as well as safety and stability of the slope at the tunnel entrance after different support schemes were all analyzed with different rainfall durations. The results showed that after 24 hours of heavy rainfall, the slope before and after a combined support including anti-slide piles and anchor cables all reached saturation state, that is, the saturation line ran through from the foot to the crest of the slope, while the slope, after benching and being supported with bolt, had its surface soil from the foot to the secondary platform of the slope under a saturated state. As for the slope at tunnel entrance supported by anti-slide pile combined with anchor cable, the variation law of its safety factor during rainfall was consistent with that of the slope without support treatment, showing that the factor of safety tended to be stable after an initial rapid decrease, and gradually reached 1.2. As for the slope after benching and being support with bolt, its factor of safety decreased a little and maintained above 1.8. It is concluded that the factor of safety, excavated earthwork quantity and total investment for the support scheme should be taken into consideration before starting a slope engineering at a tunnel entrance, and a combined support scheme including anti-slide pile and anchor cable is superior to the scheme including benching and support with bolt.

heavy rainfall  /  slope support  /  tunnel entrance  /  slope engineering  /  unsaturated soil  /  permeability coefficient  /  matrix suction
谢韬, 蔡军, 范理云, 许胜才. 强降雨条件下隧道洞口边坡开挖渗流特征以及支护方案研究. 矿冶工程杂志, 2023 , 43 (1) : 12 -15 . DOI: 10.3969/j.issn.0253-6099.2023.01.003
Tao XIE, Jun CAI, Liyun FAN, Shengcai XU. Seepage Characteristics of Slope at Tunnel Entrance Under Heavy Rainfall and Its Support Scheme[J]. Mining and Metallurgical Engineering, 2023 , 43 (1) : 12 -15 . DOI: 10.3969/j.issn.0253-6099.2023.01.003
  • 广西自然科学基金(2018GXNSFBA281129; 2020GXNSFBA297163)
  • 广西高校中青年教师科研基础能力提升项目(2018KY0559)
2023年第43卷第1期
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doi: 10.3969/j.issn.0253-6099.2023.01.003
  • 接收时间:2022-08-26
  • 首发时间:2026-03-05
  • 出版时间:2023-02-01
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  • 收稿日期:2022-08-26
基金
广西自然科学基金(2018GXNSFBA281129; 2020GXNSFBA297163)
广西高校中青年教师科研基础能力提升项目(2018KY0559)
作者信息
    1.广西交通设计集团,广西 南宁 530029
    2.贺州学院,广西 贺州 542899

通讯作者:

蔡军(1988—),男,江西抚州人,讲师,主要从事防灾减灾及防护工程方向的教学与研究工作。
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2种不同金属材料的力学参数

Family
属数
Number of
genus
种数
Number of
species
占总种数比例
Percentage of
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Genus
种数
Number of
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占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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