|Table of Contents|

Experimental study and numerical simulation on deformation characteristics of marine soft foundation soil of Wenzhou under cyclic loading(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2025年03期
Page:
183-195
Research Field:
岩土工程
Publishing date:

Info

Title:
Experimental study and numerical simulation on deformation characteristics of marine soft foundation soil of Wenzhou under cyclic loading
Author(s):
ZHANG Shasha1;  HAO Zhichen1;  ZHANG Tiangong1;  WANG Zhifeng1;  XU Jianqiang1; 2
(1. School of Highway, Chang'an University, Xi'an 710064, Shaanxi, China; 2. China Merchants Chongqing Communications Technology Research & Design Institute Co., Ltd., Chongqing 400067, China)
Keywords:
marine soft foundation soil;  cyclic loading;  particle flow simulation;  CSR
PACS:
TU447
DOI:
10.19815/j.jace.2023.11073
Abstract:
In order to understand the deformation law of marine soft foundation soil under traffic load, a series of long-term cyclic triaxial tests were carried out on the remolded marine soft foundation soil in Wenzhou. The effects of cyclic stress ratio(CSR)on the macroscopic deformation characteristics of marine soft foundation soil under different drainage conditions were compared and analyzed. The variation rules of plastic deformation, stress-resilient strain hysteresis loop and resilient modulus were revealed. On the basis, the quantitative relationship between plastic deformation and CSR, cycle times was established. The microscopic deformation characteristics of marine soft foundation soil under cyclic loading were revealed by particle flow simulation. According to the provisions of the relevant specifications on the allowable deformation of soft soil areas and different development modes of plastic deformation, the division standard of transition state was clarified and the upper limit of CSR value for stable development of plastic deformation was obtained. The results show that with the increase of CSR, the plastic deformation gradually increases logarithmically and shows four different development modes. Compared with undrained conditions, the plastic deformation under partially drained conditions increases by 0.07%-3.2%. With the increase of the number of cycles, the area of the stress-resilient strain hysteresis loop increases first and then decreases, and the resilient modulus increases after a large attenuation. The particle motion gradually changes from vertical extrusion to lateral slip, and its motion direction has obvious anisotropy.

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Last Update: 2025-06-01