缓倾角顺层斜坡变形破坏机理探析
发布时间：2018-08-14 15:37
【摘要】：研究目的:沪昆客专贵州西段沙坡特大桥4#~10#墩左侧为高陡边坡,属典型的缓倾角顺层边坡,勘察阶段定性为崩塌落石工点,施工中发现该工点的崩塌落石规模和工程危害远超过原先的认识。本文基于无人机航拍技术,通过综合勘察和地质分析,查明崩塌落石的成因和斜坡变形破坏模式,并制定出切实可行的工程措施。研究结论:(1)沙坡特大桥4#~10#墩左侧为缓倾角顺层高陡边坡,崩塌落石之所以严重,系因滑移-压致拉裂变形破坏;(2)该高陡边坡的整治范围,重点是距陡崖约35 m的贯通节理附近至崖壁间,按高度分段设防,采取清方、锚索(地梁)、喷锚网、主动防护网、锚索桩、防撞墙、截排水沟等措施进行综合整治是适宜的;(3)线路傍山选线,应远离高陡岸(边)坡,对上硬下软的缓倾角顺层高陡边坡更应引起足够重视,以避免大规模崩塌落石的危害;(4)无人机具有从上往下拍摄的优势,用于复杂艰险山区不良地质勘察,可以起到事半功倍的效果;(5)本研究成果用于沙坡特大桥4#~10#墩左侧高陡边坡的整治,对于铁路、公路高陡岸坡崩塌落石发育区的选线、勘察和设计具有借鉴意义。
[Abstract]:Research objective: the left side of Shapo Super Bridge No. 4 #Gun 10# is a high and steep slope, which belongs to a typical slope with gentle dip, and the investigation stage is defined as a collapse and falling rock site. It is found that the scale and engineering harm of the site are far greater than the original understanding. Based on aerial photography technology of UAV, through comprehensive investigation and geological analysis, the causes of rock collapse and slope deformation and failure mode are found out in this paper, and practical engineering measures are worked out. The conclusions are as follows: (1) the left side of the pier of Shapo Super Bridge No. 4 #jia10# is a high and steep slope with gentle dip angle, and the collapse and falling stone is serious because of sliding and compression induced tensile crack deformation and failure; (2) the regulation range of the high and steep slope. The emphasis is on the crossing joint from about 35 m away from the cliff to the cliff wall, and shall be fortified in sections according to height, and shall take clear square, anchor cable (ground beam), shotcrete anchor net, active protective net, anchor cable pile, anti-collision wall, It is appropriate to carry out comprehensive regulation by such measures as intercepting drainage ditch and so on. (3) the line selection along the mountain should be far away from the high and steep bank (edge) slope, and the high steep slope with gentle dip angle should be paid more attention to. (4) the UAV has the advantage of shooting from the top down and is used in the bad geological survey in the complex and dangerous mountainous areas. (5) the results of this study can be used to renovate the high and steep slope on the left side of the pier of the 4#y10# pier of Shapo Bridge, which can be used for reference in the route selection, investigation and design of the development area of the collapse and fall of the high and steep bank slope of the railway and highway.
【作者单位】： 中铁二院工程集团有限责任公司;
【分类号】：U442.2
，
本文编号：2183331
[Abstract]:Research objective: the left side of Shapo Super Bridge No. 4 #Gun 10# is a high and steep slope, which belongs to a typical slope with gentle dip, and the investigation stage is defined as a collapse and falling rock site. It is found that the scale and engineering harm of the site are far greater than the original understanding. Based on aerial photography technology of UAV, through comprehensive investigation and geological analysis, the causes of rock collapse and slope deformation and failure mode are found out in this paper, and practical engineering measures are worked out. The conclusions are as follows: (1) the left side of the pier of Shapo Super Bridge No. 4 #jia10# is a high and steep slope with gentle dip angle, and the collapse and falling stone is serious because of sliding and compression induced tensile crack deformation and failure; (2) the regulation range of the high and steep slope. The emphasis is on the crossing joint from about 35 m away from the cliff to the cliff wall, and shall be fortified in sections according to height, and shall take clear square, anchor cable (ground beam), shotcrete anchor net, active protective net, anchor cable pile, anti-collision wall, It is appropriate to carry out comprehensive regulation by such measures as intercepting drainage ditch and so on. (3) the line selection along the mountain should be far away from the high and steep bank (edge) slope, and the high steep slope with gentle dip angle should be paid more attention to. (4) the UAV has the advantage of shooting from the top down and is used in the bad geological survey in the complex and dangerous mountainous areas. (5) the results of this study can be used to renovate the high and steep slope on the left side of the pier of the 4#y10# pier of Shapo Bridge, which can be used for reference in the route selection, investigation and design of the development area of the collapse and fall of the high and steep bank slope of the railway and highway.
【作者单位】： 中铁二院工程集团有限责任公司;
【分类号】：U442.2
，
本文编号：2183331
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