|Table of Contents|

Influence of Underpass Tunnel on Bearing Capacity and Settlement of Adjacent Pile Foundation(PDF)

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

Issue:
2021年03期
Page:
117-126
Research Field:
Publishing date:

Info

Title:
Influence of Underpass Tunnel on Bearing Capacity and Settlement of Adjacent Pile Foundation
Author(s):
WANG Chao-xiong1;  HU Yu-chen2; 3;  MO Pin-qiang2; 3;  GAO Xin-wei2; 3
(1. Wuhan Surveying-geotechnical Research Institute Co., Ltd of MCC,Wuhan 430080, Hubei, China; 2. State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China; 3. School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China)
Keywords:
tunnel excavation;  pile foundation;  cavity expansion-contraction theory;  bearing capacity;  settlement
PACS:
TU473
DOI:
10.19815/j.jace.2020.06031
Abstract:
The influence of tunnel excavation on the adjacent pile foundations was reviewed, and the relevant studies on the theory of cavity expansion-contraction were summarized. The advantages and disadvantages of existing three common research methods for tunnel-pile interaction were analyzed, including the two-stage method, overall analysis method and indoor model test. On the basis of summarizing research on the theory of cavity expansion-contraction theory in geomaterials and its application in pile foundation engineering and tunnel engineering, the shortcomings of the existing cavity expansion-contraction theory for the study of shallow tunnel excavation were pointed out. Therefore, it was proposed that the interaction between shallow buried tunnel and pile foundation should be solved by using the theory of cavity expansion-contraction in a finite media considering the influence of surface effect. In addition, the initial calculation model and calculation flowchart of the method were provided, the displacement field of each stage of soil obtained by theoretical calculation was compared with the results of centrifugal model test, and the feasibility of the method was verified. Finally, based on the model, the stress field and variation of soil in each stage were given. The results show that the influence of three-dimensional tunnel excavation on adjacent pile foundations can be considered in the theory of cavity expansion-contraction, which provides a new solution to the interaction between tunnel and pile foundation.

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Last Update: 2021-05-20