软土地区沉井下沉侧壁受力性状试验研究  

Experimental Study on Side Wall Stress Behavior of Caisson Sinking in Soft Soil Area

作　　者：吴慧明 马泉坤 刘越 方林伟 李行旺 WU Huiming;MA Quankun;LIU Yue;FANG Linwei;LI Xingwang(Kaitian Engineering Technology Co.,Ltd.,Ningbo,Zhejiang 315000,China;Ningbo Hangzhou Bay New District Water Diversion Development and Construction Co.,Ltd.,Ningbo,Zhejiang 315000,China;Ningbo Tiancheng Water Conservancy and Hydropower Design Co.,Ltd.,Ningbo,Zhejiang 315000,China)

机构地区：[1]浙江开天工程技术有限公司,浙江宁波315000 [2]宁波杭州湾新区引水开发建设有限公司,浙江宁波315000 [3]宁波天成水利水电设计有限公司,浙江宁波315000

出　　处：《施工技术（中英文）》2024年第16期27-32,44,共7页Construction Technology

基　　金：宁波市水利科技计划(NSKA202106);宁波市交通运输科技计划(202106);宁波市科技计划(2019B10047)。

摘　　要：通过现场试验得到软土地区沉井开挖下沉过程中的侧壁土压力与沉降规律,是深入研究沉井侧摩阻力发展规律的可靠手段。对宁波地区引水工程沉井侧壁土压力及下沉进行全过程实时监测,分析沉井侧壁土压力的影响因素,得到了沉井沉降与侧壁土压力之间的关系,发现了与现有研究不同的侧壁土压力松弛现象,因此提出一种新的软土地区浅层沉井侧摩阻力计算模型,新模型计算的总侧摩阻力分布曲线与实测曲线接近,并通过实际工程对侧摩阻力计算结果进行了验证。The law of side wall soil pressure and settlement in the process of caisson sinking in soft soil area is obtained by field test,which is a reliable means to study the development law of side wall friction.In this paper,the side wall soil pressure and settlement of caisson in Ningbo area are monitored in real time.The influencing factors of soil pressure on caisson side wall are analyzed.The relationship between settlement and side wall soil pressure is obtained.The phenomenon of side wall soil pressure relaxation is found different from the existing research.Therefore,a new calculation model of side wall resistance of shallow subsidence of caisson in soft soil area is proposed.The total lateral wall resistance distribution curve calculated by the new model is close to the measured curve.And the calculated results of the side wall drag were validated through actual engineering.

关 键 词：沉井 软土地区 土压力 沉降 试验 

分 类 号：TU445[建筑科学—岩土工程]