摘要
北京戒台寺滑坡长达1200m,宽450m,滑体方量达900多万立方米,区内地质构造复杂,具多条、多级、多块、多层滑面特征,属特大型复杂破碎岩石滑坡。滑坡规模大,治理投资巨大,共采用了34125m锚索;大截面锚索桩35根,其中首次提出并应用了多锚点桩。对滑坡治理的工程支挡结构物进行了现场测试。在锚索墩(梁)中,布置了6孔进行锚索应力监测,测试锚索预应力随时间的变化情况;选取12#、24#抗滑桩,预埋了钢筋计及传感器监测钢筋内力及桩上锚索受力情况;在15#、24#、34#抗滑桩中分别布置了深孔位移监测,测试抗滑桩的变形规律。通过对工程结构物的受力监测及分析,了解工程结构物所处的工作状态、受力特征及其规律,并根据测试结果评价抗滑工程的效果,为滑坡支挡结构物的现场测试提供参考实例。
The Jietai temple landslide in Beijing is with 1200m long, 450m wide and the volume of the slide mass is about 9000000m^3. The geelogical structure in this zone is complex which is of characteristics of multi-stripe, multi-grade, multi-mass and multi-layer slide plane. The landslide is a large-scale fractured rock landslide and the cost of the controlling engineering is very high. The anchor cables with the total length 34125m and 35 anti-slide piles with big cross-section anchor cables were used. The anti-slide piles with the multi-anchor points are presented and applied in the engineering. The engineering retaining structures to control the landslide are monitored. In the anchor cable piers （beams）, 6 holes are arranged for the stress monitoring and the changing of the stress in the anchor cables followed the time-historical are tested. The reinforcement apparatuses and sensors are embedded in the anti-slide piles 12# and 24# to monitor the internal force and the stress of the anchor cables. The deep-hole displacement monitoring is embedded in the anti-slide piles 15#, 24# and 34#, and the deformation rules of the anti-slide piles are tested. Through the force monitoring and analysis to the engineering structures, the working behaviors, the force characters and rules of the structures could be understood. Results of the anti-slide engineering could be evaluated according the testing results which could give the referencing example for the in-situ tests of the anti-slide retaining structures.
出处
《工程勘察》
CSCD
北大核心
2008年第9期21-27,共7页
Geotechnical Investigation & Surveying
关键词
戒台寺滑坡
支挡结构
原位测试
钢筋计
传感器
Jietai temple landslide
retaining structure
in-situ test
reinforcement apparatuse
sensor
