南昌红谷沉管隧道江中模袋砂围堰冬汛灾后土石围堰重建施工技术

doi:10.3973/j.issn.1672-741X.2016.09.013

隧道建设（中英文） ›› 2016, Vol. 36 ›› Issue (9): 1114-1119.DOI: 10.3973/j.issn.1672-741X.2016.09.013

南昌红谷沉管隧道江中模袋砂围堰冬汛灾后土石围堰重建施工技术

邓彪¹，郭小龙²，李志军^2

（1. 江西省水利规划设计研究院，江西南昌 330029； 2. 中铁隧道集团二处有限公司，河北三河 065201）

收稿日期:2016-01-11 修回日期:2016-06-02 出版日期:2016-09-20 发布日期:2016-09-20
作者简介:邓彪(1972—)，男，江西南昌人，1996年毕业于南昌大学，水利水电工程建筑专业，本科，高级工程师，现主要从事水利水电工程施工设计工作。Email： 908135171@qq.com。

Reconstruction Technologies for Earthrock Cofferdam after Sandbag Cofferdam Hit by Winter Season in Ganjiang River: Case Study of Honggu Immersed Tunnel in Nanchang

DENG Biao¹, GUO Xiaolong², LI Zhijun²

(1. Jiangxi Province Water Conservancy Planning and Designing Institute, Nanchang 330029, Jiangxi, China; 2. Erchu Co., Ltd.of China Railway Tunnel Group, Sanhe 065201, Hebei, China)

Received:2016-01-11 Revised:2016-06-02 Online:2016-09-20 Published:2016-09-20

摘要/Abstract

摘要：

为快速恢复南昌红谷隧道冬汛灾后被冲毁的模袋砂堰体，给围堰内剩余工程提供无水作业条件，选用“土石围堰+塑性混凝土钻孔咬合桩和高压旋喷桩防渗体系”新型堰体恢复方案：水中利用抓斗船沿围堰轴线抛填石块，陆上利用自卸汽车外运黏土从堰体两端逐步抛填直至堰体合拢，采用成孔过程中对周边地层扰动较小的反循环钻机施工塑性混凝土钻孔咬合桩，并在新做塑性混凝土咬合桩与原围堰塑性混凝土防渗墙接茬处施工高压旋喷桩加强止水。实践证明：重建土石围堰具有施工速度快、成本相对较低、作业区域小、稳定性好、抗渗能力强等优点，适用于沉管隧道江中围堰的新建和重建等临时性水利工程。

关键词: 沉管隧道, 模袋砂围堰, 土石围堰, 围堰重建, 塑性混凝土钻孔咬合桩

Abstract:

The sandbag cofferdam of Honggu Tunnel in Ganjiang River was destroyed by winter season. It has to be reconstructed so as to provide waterless working conditions for further construction. New construction scheme of “earthrock cofferdam + plastic concrete bored secant pile and high pressure jet grouting pile seepage prevention system” is adopted. The scheme includes, rock filling along axial line of cofferdam by grab dredger, rock pushing towards cofferdam by dump truck, using plastic concrete bored secant pile constructed by reverse circulation drill and high pressure jet grouting pile seepage prevention system. The construction practice shows that the reconstructed earthrock cofferdam has advantages of rapid construction, low cost, small operating area, stable and impermeable； so that it can be applied to new and reconstructed temporary hydraulic engineering works.

Key words: immersed tunnel, sandbag cofferdam, earthrock cofferdam, reconstructed cofferdam, plastic concrete bored secant pile

中图分类号:

U 45

邓彪，郭小龙，李志军. 南昌红谷沉管隧道江中模袋砂围堰冬汛灾后土石围堰重建施工技术[J]. 隧道建设, 2016, 36(9): 1114-1119.

DENG Biao, GUO Xiaolong, LI Zhijun. Reconstruction Technologies for Earthrock Cofferdam after Sandbag Cofferdam Hit by Winter Season in Ganjiang River: Case Study of Honggu Immersed Tunnel in Nanchang[J]. Tunnel Construction, 2016, 36(9): 1114-1119.

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南昌红谷沉管隧道江中模袋砂围堰冬汛灾后土石围堰重建施工技术

Reconstruction Technologies for Earthrock Cofferdam after Sandbag Cofferdam Hit by Winter Season in Ganjiang River: Case Study of Honggu Immersed Tunnel in Nanchang

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