摘要
由于滑坡地质灾害的突发性、复杂性和不确定性,在该类治理工程中,工程环境往往成为方案选型的首要限制因素;常会遇到施工场地狭窄,施工作业面受限,大型机械无法到达、常规施工工艺无法施工等特殊问题,需要因地制宜地选择最优治理方案。微型桩组合抗滑结构因其具有桩径小、施工快捷、施工人员安全保障高、经济性好等优点[1],可用于滑坡地质灾害治理工程中,尤其是快速抢险工程。结合数值模拟分析及工程设计实例,结果表明:连系梁对微型桩的变形起到一定的限制作用,对其受力则影响较大;变形最大值出现在临边坡侧后排桩的上部,且后排桩锚索对整体变形的限制作用明显;组合抗滑结构稳定性验算应重点包括剩余下滑力、结构整体抗力、微型桩沿滑面抗剪承载力、桩内力、桩嵌固长度等内容。
Due to the suddenness,complexity and uncertainty of landslide geological disasters,the engineering environment is often the primary limiting factor for scheme selection in such treatment projects.Special problems such as narrow construction site,limited construction surface,inability of large machinery to arrive,and inability of conventional construction technology to be constructed are often encountered,so it is necessary to choose the optimal treatment plan according to local conditions.Due to its advantages of small pile diameter,quick construction,high safety guarantee for construction personnel and good economy[1],the micro-pile combination anti-slip structure can be used in landslide geological disaster control projects,especially in rapid rescue projects.Combined with numerical simulation and engineering design examples,the results show that the connecting beam has a certain limiting effect on the deformation of the micro pile,but has a great influence on its force.The maximum deformation occurs in the upper part of the back pile on the side of the slope,and the anchor cable of the back pile has obvious limiting effect on the overall deformation.The stability calculation of composite anti-sliding structure should include residual sliding force,overall resistance of structure,shear bearing capacity of micro pile along sliding surface,pile internal force,pile embedment length and so on.
作者
张堪培
冯龙飞
ZHANG Kanpei;FENG Longfei(Guangdong Hydrogeology Battalion Guangzhou 510510,China)
出处
《广东土木与建筑》
2024年第1期25-28,共4页
Guangdong Architecture Civil Engineering
关键词
微型桩组合抗滑结构
桩土作用
数值模拟
结构变形
受力
combining micropiles structure
pile-soil interaction
numerical simulation
structural deformation
internal force
