Construction Technology for Gushing Control by Using
Opening&nbsp;Differential
of Double Gate of Shield Screw Conveyor

DING Erwei, LUO Jiehua, LIU Shaokai, HUANG Jianghua, WU Yong, YANG Xiangxiang, REN Hui, CHENG Shaogong, ZHAO Yunhui

doi:10.3973/j.issn.2096-4498.2023.S1.058

Tunnel Construction >

2023 , Vol. 43 >Issue S1: 493 - 498

DOI: https://doi.org/10.3973/j.issn.2096-4498.2023.S1.058

Construction Technology for Gushing Control by Using Opening Differential of Double Gate of Shield Screw Conveyor

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(1. Zhejiang Huadong Surveying and Mapping and Engineering Safety Technology Co., Ltd., Hangzhou 310012,Zhejiang，China; 2. Huadong Engineering Corporation Limited, Hangzhou 310012, Zhejiang，China;3. Hefei Rail Transit Group Co., Ltd., Hefei 230001, Anhui, China; 4. Zhejiang Smart Rail Transit Engineering Technology Research Center, Hangzhou 310012, Zhejiang, China;[JP2]5. China Construction Eighth Engineering Division Rail Transit Construction Co., Ltd., Nanjing 210018, Jiangsu, China)

Online published: 2023-08-28

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Abstract

In order to solve the gushing problem of shield screw conveyor caused by high pressure rich water in the waterrich sandy soil, sandy pebble, and upper soft and lower hard composite strata, according to the relationship and the inversely proportion principle between the flow rate that mud water passing through the gate and the cross section, a kind of construction technology is proposed. It adopts the opening differential of the double gates of screw conveyor to enlarge the cross section of deslagging and reduce the pressure step by step. The technology can ensure continuity of mucking for the screw conveyor during shield tunneling, which avoids the risks of the pileup in chamber caused by slag gushing, the cutterhead wear caused by loss of pressure, surface subsidence and so on. The technology was applied in the section between Mingxiu Road station and Xiuxiang station of Nanning metro line 2, realizing rapid and continuous excavation for shield tunneling in the sandy pebble waterrich strata, reducing the disturbance to the stratum and effectively controlling the ground subsidence. In all, the construction technology has obvious advantages in efficiency, economy, operability, safety, and practicability.

Key words： shield construction; opening differential; gushing control; pileup in chamber; double gate; stepbystep pressure reduction; stress characteristics

Cite this article

DING Erwei, LUO Jiehua, LIU Shaokai, HUANG Jianghua, WU Yong, YANG Xiangxiang, REN Hui, CHENG Shaogong, ZHAO Yunhui .

Construction Technology for Gushing Control by Using Opening Differential of Double Gate of Shield Screw Conveyor

[J]. Tunnel Construction, 2023 , 43(S1) : 493 -498 . DOI: 10.3973/j.issn.2096-4498.2023.S1.058

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