舟曲锁儿头滑坡抗滑桩监测及分析  

Monitoring and analysis of anti-slide pile of the Suo'ertou large landslide in Zhouqu

作　　者：王秀丽[1,2] 金兆鑫[1,2] 董文燕[1,2] 任永忠[1,2] 

机构地区：[1]兰州理工大学土木工程学院,甘肃兰州730050 [2]西部土木工程防灾减灾教育部工程研究中心,甘肃兰州730050

出　　处：《水文地质工程地质》2015年第5期123-128,共6页Hydrogeology & Engineering Geology

基　　金："十二五"国家科技支撑计划-白龙江流域滑坡泥石流工程防治技术研究与示范(2011BAK12B07)

摘　　要：在滑坡治理工程中抗滑桩桩身受力变形主要由钢筋应力与混凝土应变的监测反映,为此对锁儿头滑坡抗滑桩进行受力监测,得出了抗滑桩在使用过程中的内力变化特征:抗滑桩支挡初期,钢筋应力值、混凝土应变值月增加值幅度较大,随着抗滑支挡结构与内部岩体的相互作用,月增加值逐步趋于平稳。监测至今:抗滑桩单筋最大拉应力为260.3MPa,最大压应力为-267.2 MPa,均小于钢筋最大应力335 MPa,混凝土应力值在-7.42 MPa^2.16 MPa之间,抗滑桩的整体弯矩还具备87.1%的安全储备,抗滑桩的受力与变形均处于弹性工作状态,抗滑桩加固该滑坡起到了抗滑支挡效果。Anti-slide pile is one of the main retaining structure for governing landslide. However, the research on the actual working state of anti- slide pile is not very clear. Based on the governing engineering instance of the Suo＇ ertou landslide, this paper describes the application of the steel bar meter and concrete strain meter to the monitoring anti-slide pile＇ s internal force. The monitoring results show some variation in the internal forces in the operation of anti-slide pile. The early anti-slide pile retaining, steel stress and concrete strain magnitude monthly increase in larger value, with the interaction of anti-slide retaining structures and internal rock increase monthly and gradually to the stabilized value. The monitoring data until now show that the maximum tensile stress of the single reinforcement on anti-slide pile is as high as 260.3 MPa. The maximum compressive stress is - 267.2 MPa. Both of the values are less than the maximum stress of steel bar. The concrete stresses are between -7.42 MPa and 2.16 MPa. The bending moment of the anti-slide also is 87.1% of the security reserve. The stress deformation of the anti-slide pile is still in the elastic working state. The anti-slide pile has an anti-sliding and retaining effect.

关 键 词：滑坡治理 抗滑桩 监测 钢筋应力 混凝土应变 

分 类 号：P642.22[天文地球—工程地质学]