浅埋矩形顶管群密贴施工的顶推力分析研究

doi:10.3973/j.issn.2096-4498.2019.03.007

隧道建设（中英文） ›› 2019, Vol. 39 ›› Issue (3): 383-390.DOI: 10.3973/j.issn.2096-4498.2019.03.007

浅埋矩形顶管群密贴施工的顶推力分析研究

贺善宁¹, 豆小天², 赵李勇², 崔现慧², 王晋波², 宝青峰²

（1. 中铁隧道局集团有限公司，广东广州 511458； 2. 中铁隧道集团二处有限公司，河北三河 065201）

收稿日期:2018-06-29 修回日期:2019-03-11 出版日期:2019-03-20 发布日期:2019-04-03
作者简介:贺善宁（1980—），男，河南潢川人，2002年毕业于重庆交通学院，土木工程专业，本科，高级工程师，现从事地下工程及隧道技术管理工作。Email: 493755647@qq.com。

Analysis of Thrust Force of Adjacent Construction of Shallowburied Rectangular Pipe Jacking Tunnel Group

HE Shanning¹, DOU Xiaotian², ZHAO Liyong², CUI Xianhui², WANG Jinbo², BAO Qingfeng²

(1. China Railway Tunnel Group Co., Ltd., Guangzhou 511458, Guangdong, China; 2. The 2nd Engineering Co., Ltd. of China Railway Tunnel Group, Sanhe 065201, Hebei, China)

Received:2018-06-29 Revised:2019-03-11 Online:2019-03-20 Published:2019-04-03

摘要/Abstract

摘要：

为明确矩形顶管群密贴施工中顶管顶推力的发展规律与影响因素，以圆形顶管顶推力计算理论为基础，依托实际的试验工程背景，分7个工况分别进行顶推力的统计分析。通过多工况理论估算与实测数据对比，验证管顶推力的实测值与理论值在规律上的一致性，同时得出该理论值较实测值偏小的结论。针对试验工程中出现的减摩失效、顶管背土、姿态异常等问题展开研究，通过对比分析不同工况实测顶推力发展规律，最终得出: 就本工程而言，减摩泥浆的减摩效果明显，顶推力减小约38.2％；顶管背土与顶管姿态对顶推力具有较大的负面影响，其中,顶管背土导致每节顶推力增加约16.7％，顶管姿态异常引起顶推力额外增加17.8节的理论推力。

关键词: 浅埋矩形顶管群, 顶推力, 减摩泥浆, 顶管背土, 姿态异常

Abstract:

Based on the jacking force theory used in circular pipes, the development law and influencing factors of thrust force of rectangular pipe jacking tunnel group are analyzed through 7 working conditions in actual experimental engineering. The uniformity of the monitored pipe jacking force and theoretical values is verified by comparison between theoretical estimation and monitored data, and it is concluded that the theoretical values are smaller than monitored data. And then the problems of friction reduction, the phenomenon of pipe carrying soil, and attitude deviation are studied. Finally, by comparatively analyzing the development law of thrust force in different working conditions, it is concluded that: (1) The friction reduction effect of lubricating mud is obvious, i.e. the thrust force is reduced by about 38.2%. (2) The phenomenon of pipe carrying soil and attitude deviation greatly affect the thrust force, wherein the thrust force of each segment induced by the phenomenon of pipe carrying soil is increased by about 16.7%, and that induced by attitude deviation is increased by 17.8 of pipe force. 

Key words: shallowburied rectangular pipe jacking group, thrust force, lubricating mud, pipe carrying soil phenomenon, attitude deviation

中图分类号:

U 455.47

贺善宁, 豆小天, 赵李勇, 崔现慧, 王晋波, 宝青峰. 浅埋矩形顶管群密贴施工的顶推力分析研究[J]. 隧道建设, 2019, 39(3): 383-390.

HE Shanning, DOU Xiaotian, ZHAO Liyong, CUI Xianhui, WANG Jinbo, BAO Qingfeng. Analysis of Thrust Force of Adjacent Construction of Shallowburied Rectangular Pipe Jacking Tunnel Group[J]. Tunnel Construction, 2019, 39(3): 383-390.

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浅埋矩形顶管群密贴施工的顶推力分析研究

Analysis of Thrust Force of Adjacent Construction of Shallowburied Rectangular Pipe Jacking Tunnel Group

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