文献类型：期刊文献

中文题名：喀斯特地区锚杆静压桩法地基—基础托换加固工程案例技术分析

英文题名：Technique study on building foundation reinforcement by using anchor static pressure piles in karst area

作者：焦卫国 季永新 熊亮 罗昌虎 刘翔

第一作者：焦卫国

机构：[1]贵州理工学院土木工程学院;[2]贵州中建建筑科研设计院有限公司

第一机构：贵州理工学院土木工程学院

年份：2018

卷号：46

期号：10

起止页码：13-19

中文期刊名：工程勘察

外文期刊名：Geotechnical Investigation & Surveying

收录：CSTPCD;;Scopus

基金：黔科合基础[2017]1079;黔科合SY字[2015]3055;中建四局科技研发课题(CSCEC4B-2015-KT-03)

语种：中文

中文关键词：喀斯特地质;红粘土;软弱下卧层;锚杆静压桩;基础托换加固

外文关键词：karst geology;red clay;weak underlying stratum;anchor static pressure pile;replacementand reinforcement of foundation

摘要：我国西南地区喀斯特地质地貌发育,红粘土广泛分布。红粘土的"反剖面"特征加之土层较薄、厚度变化较大、下覆石灰岩上石芽(林)出露、基岩面倾斜起伏导致地基土可压缩层厚度不均为建筑物基础的稳定性带来诸多技术问题。以我国西南某市一大楼基础托换加固工程为案例,对喀斯特地区锚杆静压桩的压桩施工、桩体稳定(斜桩与飘桩)、压桩终压力、压桩系数与单桩承载力之间的关系进行了实测与分析;对喀斯特地区红粘土中静压桩施工双控原则、桩端阻力特征、桩体稳定性判别方法和挤土效应等措施进行了技术总结;对锚杆静压桩加固治理中产生的附加沉降发展规律进行了监测并通过信息化施工实现对建筑物基础沉降的主动调控和纠倾治理。最后对该工程进行了效果评价和技术总结,为喀斯特地区锚杆静压桩基础托换加固工程应用提供了重要参数依据。
The karst physiognomy is well developed and the red clay is widely distributed in the southwest of China. Owing to the reverse profile characteristics coupled with the thin soil, uneven thickness and bedrock surface slope, there are many technological problems for building foundation stability. Taking the building foundation reinforcement by using anchor static pressure piles as the case in karst area, the construction sequence and procedure, the pile end pressure, pressure coefficient of pile and single pile bearing capacity are analyzed and verified. The pressure on pile, the pile end resistance, the stability criterion of pile body and the measures to reduce the soil squeezing effect are summarized. The laws of building settlement which are monitored and analyzed in the construction of the anchor static pressure piles are used to guide the construction. Finally, the economic effect is evaluated and the technical key points are summarized for the engineering project to provide the important parameters for anchor static pressure piles used in karst area.