Laplace变换解双层地基固结问题

›› 2005, Vol. 26 ›› Issue (5): 833-836.

Laplace变换解双层地基固结问题

王新辉¹，缪林昌²，高健康³，赵亻黾⁴

1.东南大学建筑设计研究院交通分院，南京 210096；2.东南大学岩土工程研究所，南京 210096； 3.深圳市工勘岩土工程有限公司，深圳 518026；4.江苏省高速公路建设指挥部，南京 210004

收稿日期:2004-02-05 出版日期:2005-05-10 发布日期:2013-12-17
作者简介:王新辉，男，1979年生，硕士研究生，主要从事高速公路软基处理及固结理论的研究
基金资助:
江苏沿海地区高速公路海相软土地基变形特性与应用研究资助项目（No.02Y13）

Solution of one-dimensional consolidation for double-layered ground by Laplace transform

WANG Xin-hui¹, MIAO Lin-chang², GAO Jian-kang³, ZHAO Min⁴

1. Transportation Branch of Architectural Design & Research Institute, Southeast University, Nanjing 210096, China; 2. Institute of Geotechnical Engineering, Southeast University, Nanjing 210096, China; 3. Shenzhen Gongkan Geotechnical Engineering Co., Ltd., Shenzhen 518026, China; 4. Expressway Construction Headquarters of Jiangsu Province, Nanjing 210004, China

Received:2004-02-05 Online:2005-05-10 Published:2013-12-17

摘要/Abstract

摘要： 连云港地区的软土是海相淤泥和淤泥质土。在连云港软土地区修筑高速公路时，通常采用水泥土搅拌桩地基处理方法使路基强度和变形满足工程的要求。该类软土压缩沉降量大，排水固结缓慢，地基稳定性差，造成高速公路建设中及建成后工程问题频繁出现。从江苏海相软土的工程实例出发，将经水泥土搅拌桩处理后的高速公路路基简化为双层地基，借助Laplace变换求解了二级加荷下的双层地基一维固结问题，为克服对固结方程进行Laplace逆变换的困难，在Laplace逆变换中运用Stehfest算法进行数值求解，该双层地基固结沉降计算结果与实际观测数据基本一致。

关键词: 江苏海相软土, 双层地基, Laplace变换, Stehfest算法, 沉降

Abstract: Lianyungang marine soft clay is muck and mucky soil. When the expressway was built in the district, the soft clay foundation was often treated by cement-soil piles. This marine soft clay is of high compression, lower drainage consolidation and poor stability for its roadbed. During engineering construction, the phenomena, as larger settlement deformation, crack and slide, often took place on the embankment. Based on practical project for Jiangsu marine soft clay, the composite ground of cement-soil piles is simplified into the double-layered ground. The one-dimensional consolidation of the double-layered ground is solved by means of Laplace transform for two-step loading. To get over the difficulty of solving the inversion of Laplace transform, Stehfest numerical transform is applied here. The results of calculating settlements of the double-layer consolidation theory are in agreement with the measuring settlements.

Key words: Jiangsu marine soft clay, double-layered ground, Laplace transform, Stehfest algorithm, settlement

中图分类号:

TU 472

王新辉，缪林昌，高健康，赵亻黾. Laplace变换解双层地基固结问题[J]. , 2005, 26(5): 833-836.

WANG Xin-hui , MIAO Lin-chang , GAO Jian-kang , ZHAO Min，. Solution of one-dimensional consolidation for double-layered ground by Laplace transform[J]. , 2005, 26(5): 833-836.

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