ISSN 2096-4498

   CN 44-1745/U

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Tunnel Construction >

2021 , Vol. 41 >Issue 10: 1740 - 1747

DOI: https://doi.org/10.3973/j.issn.2096-4498.2021.10.013

Analysis of Shell Earth Pressure and Jacking Force of Quasi-Rectangular Pipe Jacking with Large Cross-Section: a Case Study on Underpass Project at Songhu Road-Sanmen Road in Shanghai

  • ZHENG Bin
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  • (1. SUCG International Engineering Co., Ltd., Shanghai 200032, China; 2. SUCG Infrastructure India Pvt. Ltd., Delhi 110070, India)

Online published: 2021-11-04

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Abstract

The monitoring results of shell earth pressure and jacking force of quasi-rectangular pipe jacking with a large crosssection in an underpass project at Songhu Road-Sanmen Road are compared with calculated results in codes using a quantitative method of theoretical and data analysis. The empirical coefficient is introduced to analyze the squeezing effect of quasirectangular pipe jacking head. The results show the following. (1) The calculated shell earth pressure using the soil column and Rankine earth pressure theories is relatively small. (2) The jacking force is linear with the mileage, where unit external friction is the slope, and frontal resistance is the intercept. (3) The circular section is the basis of the calculation methods of the unit external friction of quasirectangular pipe jacking tunnel given in the 2008 and 1997 editions of Code for Construction and Acceptance of Water and Sewerage Pipeline Works. For the quasirectangular pipe jacking tunnel in this project, the calculation result from the 2008 edition is 20% smaller than the actual value. (4) For the sandy silt ground in Shanghai, the lateral coefficient of control earth pressure is recommended to be 0.8.

Key words： quasi-rectangular pipe jacking with large cross-section; sandy silt; earth pressure; jacking force

Cite this article

ZHENG Bin . Analysis of Shell Earth Pressure and Jacking Force of Quasi-Rectangular Pipe Jacking with Large Cross-Section: a Case Study on Underpass Project at Songhu Road-Sanmen Road in Shanghai[J]. Tunnel Construction, 2021 , 41(10) : 1740 -1747 . DOI: 10.3973/j.issn.2096-4498.2021.10.013

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