软土地基上的堤闸建设问题

珠江三角洲的软土分布广泛,水利建设中正在遇到大量在软土地基上的堤围加固，穿堤涵闸的建设问题，其中最主要的技术难题是软基处理的问题。本文主要是针对目前建设中遇到的软土地基承载力的合理确定问题及涵闸地基处理、软土地基的变形问题、填土速率的控制问题、旧堤加固及软土参数取值问题、侧向土压力问题、复合地基的应用问题、软土施工顺序的影响等技术问题进行探讨,因为这些问题影响到工程的质量和安全,是目前工程建设中急需解决的问题。

Several problems of constructing dikes and sluices on soft soil grounds

The soft soil is widespread in Pearl River delta area.There are many problems in reinforcing a dike or constructing a crossing-dyke sluice on soft soil grounds during the construction process, in which the most difficult and key technical problem is the treatment of soft-soil grounds. Several problems that are encountered in construction at present are discussed in this paper, including how to determine reasonably the bearing capacity of soft soil grounds and treat the ground of sluice; how to calculate exactly the settlement of soft soil grounds and control the velocity of filling; parameters selection of soft soil under reinforced dike ; lateral soil pressure; application of the composite foundation and infection of construction sequence on soft soil etc.. The quality and security of project are affected by these problems, which should be solved urgently in present construction works.