临江超深基坑对堤防的影响分析及防护对策研究

Analysis of the influence of Linjiang ultra-deep foundation pit on embankment and protective countermeasures

随着临江临河城市建设迅猛发展,江河岸边场地越来越紧缺,出现了很多临江超深超大地下建(构)筑物,其施工过程中要有地下作业空间而形成临江地下超深基坑。本文主要结合近年来在长江中下游地区多个临江超深超大基坑工程降水封水实践,分析临江超深基坑降水引起堤防等防洪构筑物基础沉降的主要因素,探讨防洪构筑物基础沉降量预测方法,提出了减少防洪构筑物基础沉降的工程措施以及工程措施在临江超深基坑工程降水实践中的应用效果等,供临江超深基坑降水方案设计和防汛主管部门参考。

With the rapid development of the construction of cities near the river,available sites on the river bank is more and more scarce because ultra-deep and super large underground buildings(structures)on the river needs enough work space during the construction process which therefore develops Linjiang ultra-deep foundation pit.This paper aims to analyze the main factors of foundation settlement of flood control structures such as levees caused by drainage of super deep foundation pit in Linjiang River,combined with projects of dewatering sealing in several super deep and super deep foundation pit projects in the middle and lower area of the Yangtze River in recent years and discuss the prediction method of foundation settlement of flood control structures and propose the engineering measures to reduce the settlement of flood control structures and its application effect in drainage practice of super deep foundation pit near the river.The above results can provide some references for the design of drainage scheme and flood control department of super deep foundation pit near the river.