Numerical Research of Lightweight Foam Concrete Replacement Method of Deep Soft Foundation Treatment of Low-Filled Embankment

Author:

Li Fanfan1ORCID,Zhang Zhifeng1ORCID,Chen Xing1ORCID,Chi Zecheng2ORCID,Li Jianbin3ORCID,Wang Wei4ORCID

Affiliation:

1. Research and Development Center on Technology and Equipment for Energy Conservation and Environmental Protection of Highway Transport, Anhui Transport Consulting & Design Institute Co., Ltd, Hefei 230088, China

2. Faculty of Engineering, China University of Geosciences, Wuhan 430074, China

3. School of Civil Engineering, Guangzhou University, Guangzhou 510006, China

4. Guangdong Research Institute of Water Resources and Hydropower, Guangzhou 510610, China

Abstract

A new method of replacing soft soil with lightweight foam concrete (lightweight foam concrete replacement method, LFCRM) is carried out to treat deep soft foundation under the low-filled embankment. Two-dimensional models with different thicknesses of replacement are established by the finite element platform (MIDAS/GTS). Moreover, the deformation and stress distribution law of treated foundation is analyzed by numerical simulation with different models. The results are as follows: (1) LFCRM can offset part of dead load; (2) the transverse distribution of settlement presents an “arc” shape; (3) the replacement made of lightweight foam concrete can spread stress well; (4) increase of replacement thickness will cause the necking of the additional stress “bubble”; (5) initial excess pore water pressure is related to the additional stress, and its dissipation path is deduced; (6) preliminary analysis indicates the feasibility of LFCRM for treating deep soft foundation with the low-filled embankment.

Funder

Science and Technology Project of Housing Urban and Rural Construction

Publisher

Hindawi Limited

Subject

General Earth and Planetary Sciences

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