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Backfilled cofferdam constructed in branched bins of subsea tunnel and construction method thereof

A subsea tunnel and construction method technology, applied in construction, infrastructure engineering, etc., can solve problems such as increased safety risks of cofferdam structures, large navigation and ecological impacts in sea areas, etc.

Pending Publication Date: 2018-09-25
SHENZHEN MUNICIPAL DESIGN & RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method has a great impact on navigation and marine ecology, and as the length of the tunnel increases, the safety risk of the cofferdam structure will also increase significantly

Method used

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  • Backfilled cofferdam constructed in branched bins of subsea tunnel and construction method thereof
  • Backfilled cofferdam constructed in branched bins of subsea tunnel and construction method thereof
  • Backfilled cofferdam constructed in branched bins of subsea tunnel and construction method thereof

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Embodiment Construction

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0029] The purpose of the present invention is to provide a back-building cofferdam and a construction method for subsea tunnel sub-compartment construction to solve the above-mentioned problems in the prior art. , to achieve the purpose of effectively simplifying the construction process, speeding up the construction progress, and fully ensuring the water-retaining effect and overall stability of the sub-silo cofferdam.

[0030] In order to make the above obj...

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Abstract

The invention discloses a backfilled cofferdam constructed in branched bins of a subsea tunnel and a construction method thereof. The backfilled cofferdam comprises a bottom waterproof curtain, two side surface waterproof curtains, an earth rock cofferdam and a top waterproof curtain, wherein the bottom waterproof curtain extends downwards from the bottom of a foundation pit; the two side surfacewaterproof curtains extend outwards to a side wall of a current bin cofferdam respectively from two side walls of the foundation pit, and two ends of the bottom waterproof curtain are respectively connected to the bottom of one side surface waterproof curtain; the top of a tunnel is backfilled with an overburden layer until reaching a planned seabed elevation, and the earth rock cofferdam is constructed on the overburden layer; and the top waterproof curtain is arranged in the earth rock cofferdam, and extends upwards to the top of the earth rock cofferdam from the top of the tunnel, two endsof the top waterproof curtain are respectively connected to two side walls of the current bin cofferdam, and the tops of the two side surface waterproof curtains are connected to the bottom of the bottom waterproof curtain. According to the backfilled cofferdam and the construction method, branched bin cofferdams are effectively linked, and the waterproof effect and integral stability of the branched bin cofferdams are adequately guaranteed.

Description

technical field [0001] The invention relates to the technical field of subsea tunnel construction, in particular to a back-building cofferdam and a construction method for sub-compartment construction of a subsea tunnel. Background technique [0002] In recent years, with the rapid development of my country's urban construction and traffic demand, more and more cities have started construction and built a large number of submarine municipal tunnels, such as Xiamen Xiang'an Submarine Tunnel, Qingdao Jiaozhou Bay Submarine Tunnel, Shenzhen Mawan Cross-sea Passage , Shenzhen Haibin Avenue Submarine Tunnel, etc.; and the trend of large-span and long-distance tunnel sections is obvious. Two-way six-lane and two-way eight-lane sections are not uncommon. The length of the subsea tunnel has also reached 1.6km, which brings great challenges to the design and construction of the tunnel. [0003] The construction methods of subsea municipal tunnels mainly include shield method, immersed...

Claims

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Application Information

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IPC IPC(8): E02D19/04
CPCE02D19/04
Inventor 彭琦黄夏寅唐超华王建新马敏王雷陈鸿曹智明
Owner SHENZHEN MUNICIPAL DESIGN & RES INST
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