防渗墙施工引起堤防裂缝的离心模型试验研究  

Analysis of levee cracking during diaphragm wall construction using centrifuge model tests

作　　者：李青云[1] 濮家骝[1] 殷昆亭[1] 李德吉 张明光[2] 李明达[2] 

机构地区：[1]清华大学水利水电工程系,北京100084 [2]长江水利委员会设计院,武汉430010

出　　处：《清华大学学报（自然科学版）》2002年第4期543-545,共3页Journal of Tsinghua University(Science and Technology)

基　　金：国家自然科学基金资助项目 ( 5 0 0 9962 0 ) ;长江水利委员会资助项目

摘　　要：为研究长江干堤防渗墙施工中堤身产生裂缝的机理 ,采用土工离心模型试验手段 ,成功地再现了堤防产生裂缝的过程。试验结果表明 ,堤身裂缝是由泥浆压力造成槽孔端部土体劈裂而引起的。通过不同方案的离心模型试验 ,讨论了堤防土质、干密度、泥浆密度、槽孔长度和防渗墙位置等因素在产生裂缝中所起的作用。研究结果为进行裂缝的工程处理提供了科学依据。Centrifuge model tests were used to investigate levee cracking during the construction of the concrete diaphragm wall on the Yangtze River main levee. The occurrence and propagation of levee cracks were observed successfully in the centrifuge model tests. The model tests revealed that the hydraulic pressure of the slurry acting on the slurry trench wall caused fracturing of the soil mass at the end of the slurry trench which initiated the propagation of cracks in the levee. The experiment results were used to analyze key factors affecting crack occurrance, such as soil type, dry density of the levee, slurry density, and length and location of the slurry trench. The results are successfully adopted as countermeasures against cracking.

关 键 词：施工 试验 堤防 防渗墙 泥浆 裂缝 离心模型 

分 类 号：TV871.1[水利工程—水利水电工程]