摘要
随着城市化进程的推进,黄土地区城市建设向周边高阶地及大厚度黄土地区发展,伴随而来的由黄土湿陷引发的工程事故也日益增多。大厚度湿陷性黄土场地消除湿陷性具有技术难度和工程难度均较大的特点,重要建构筑物通常采用桩基础形式穿透全部湿陷性黄土层,但防水措施失效、桩周土浸水后,桩侧阻力由正摩阻力转变为负摩阻力,以及受桩底沉渣影响,部分桩基发生下沉并与主体结构脱开现象。以某工程清水池漏水导致基础沉陷事故为例,分析了桩基沉降及池体开裂的发生原因,提出了经济可行加固设计方案,加固效果良好,可为类似工程提供参考。
With the advancement of urbanization, urban construction in the loess area has developed to the surrounding high terraces and large-thick loess areas, and the accompanying engineering accidents caused by the collapse of the loess are increasing. The large-thickness collapsible loess site has the characteristics of technical difficulty and engineering difficulty to eliminate collapsibility, the important buildings and structures usually use pile foundations to penetrate all collapsible loess layers, but the waterproof measures fail and the soil around the piles immersed in water, the pile side shaft resistance changes from positive to negative, and due to the impact of pile bottom sedimentation, part of the pile foundation sinks and separates from the main structure. Taking an example of a foundation settlement accident caused by a water leakage in a clean water pools, the reasons for the settlement of the pile foundation and the cracking of the pool body were analyzed, and an economically feasible reinforcement design plan was proposed. The reinforcement proved to be effective, which can provide a reference for similar projects.
作者
王奇山
何腊平
曹程明
WANG Qishan;HE Laping;CAO Chengming(Gansu CSCEC Municipal Engineering Investigation and Design Institute Co.,Ltd.,Lanzhou 730000,China;CSCEC AECOM Consultants Co.,Ltd.,Lanzhou 730000,China)
出处
《建筑结构》
CSCD
北大核心
2021年第S02期1387-1391,共5页
Building Structure
关键词
大厚度湿陷性黄土
清水池
基础沉陷
负摩阻力
加固
collapsible loess with large depth
clean-water pools
foundation subsidence
negative shaft resistance
reinforcement
