Waterproof and Drainage Design and Construction
Technology&nbsp;of
SuperLargeSpan Tunnel Structures

WANG Xing; HE Weiguo; FEI Manli; SONG Chaoye

doi:10.3973/j.issn.2096-4498.2022.07.015

Tunnel Construction >

2022 , Vol. 42 >Issue 7: 1267 - 1273

DOI: https://doi.org/10.3973/j.issn.2096-4498.2022.07.015

Waterproof and Drainage Design and Construction Technology of SuperLargeSpan Tunnel Structures

WANG Xing ,
HE Weiguo ,
FEI Manli ,
SONG Chaoye

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(1. China Railway Liuyuan Group Co., Ltd., Tianjin 300308, China;  2. China Railway Tunnel Survey & Design Institute Co., Ltd., Tianjin 300133, China)

Online published: 2022-08-04

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Abstract

Technical difficulties, such as difficult laying, multiple weld joints, easy falling, and difficult quality control, are always present in the waterproof and drainage construction of superlarge tunnel structures with spans greater than 30 m. Therefore, a new waterproof and drainage system, composed of a ring and longitudinal drainage system, composite geomembrane, highelastic film waterproof layer, selfcompacting concrete, and joint waterproofing, is proposed. Furthermore, the design composition, layout, and maintainability design of the ring and longitudinal drainage blind pipe, concaveconvex drainage plate, and drain pipe are introduced from the perspective of drainage. From the perspective of waterproof, the dual characteristics of isolation and antiseepage of composite geomembrane, performance index and spraying design of sprayed membrane waterproof layer, waterproof design of the selfcompacting concrete structure and joint, and construction key technologies are introduced. The practice results indicate that the proposed waterproof and drainage system can be applied to the superlargespan tunnel structures, resulting in safe and reliable construction, high work efficiency, and good waterproof effect.

Key words： ; superlargespan tunnel; waterproof and drainage; membrane waterproof; composite geomembrane; selfcompacting concrete

Cite this article

WANG Xing , HE Weiguo , FEI Manli , SONG Chaoye .

Waterproof and Drainage Design and Construction Technology of SuperLargeSpan Tunnel Structures

[J]. Tunnel Construction, 2022 , 42(7) : 1267 -1273 . DOI: 10.3973/j.issn.2096-4498.2022.07.015

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