Method for relieving and cutterhead repairing of shield machine in weathering groove

A shield machine and cutter head technology, which is applied in earthwork drilling, shaft lining, tunnel lining, etc., can solve the problems of high cost, complicated process, and long construction period, and achieve the effect of low cost, simple process, and controlled quality

Active Publication Date: 2012-01-04
THE 2ND ENG OF THE 12TH BUREAU GROUP OF CHINA RAILWAY +1
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Problems solved by technology

[0003] In order to solve the problems of complex process, long construction period and high cost in shield body escape and cutter head repair in existing...

Method used

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example

[0064] The Shiziyang Tunnel is newly built on the Guangzhou-Shenzhen section of the Guangzhou-Shenzhen-Hong Kong Express Rail Line. The Shiziyang Tunnel, located in Nansha District, Guangzhou, has a length of 10.8 kilometers on the left and right lines. The tunnel crosses three waterways, Xiaohuli, Shazili and Shiziyang. It is currently the first underwater railway with the longest mileage and the highest construction standards in China. tunnel. The Shiziyang Tunnel has a total length of 10.8 kilometers, a target speed of 350 kilometers per hour, and crosses the river and ocean three times. Among them, Shiziyang has a water surface of 3,300 meters and a water depth of 26.6 meters. It is the main channel of the Pearl River shipping, and the design water pressure is 0.67MPa.

[0065] In September 2010, the left and right shield machines at the entrance of the Shiziyang Tunnel were worn and cracked due to the mud cake on the cutter head, the cutter box was deformed during the tu...

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Abstract

The invention relates to the technical field of tunnel shield construction, in particular to a method for relieving and cutterhead repairing of a shield machine in a weathering groove. By means of the method, the problems of complex process, long construction period, high cost and the like during shield body relieving and cutterhead repairing in conventional construction are solved. The method comprises the steps of: carrying out grouting reinforcement on collapse body in front of a cutterhead, collapse body above the cutterhead, collapse body above shield tail and collapse body of an anchor cable; building water pressure of cut, eliminating counter-force of tunneling, retreating the shield body and relieving the cutterhead; drilling, exploding and repairing caverns, cleaning the excavated bin and repairing internal structure, body structure and accessory structure of the cutterhead to ensure that the shield body recovers tunneling. The method has the advantages of simple process, short construction period, low construction cost, strong applicability and the like. By means of the method, the relieving and the repairing of the cutterhead of the tunnel are successfully completed; the risk that river water backward pouring into the tunnel is avoided; the shield machine can rapidly recovering the normal tunneling; and the favorable economic benefit and social benefit are obtained.

Description

technical field [0001] The invention relates to the technical field of tunnel shield construction, in particular to a method for a shield machine to get out of trouble in a weathering tank and to repair a cutter head. Background technique [0002] With the development of urban construction in our country, there are more and more underground projects such as underground rail transit and cross-river tunnels, and the shield tunneling distance of tunnels is also getting longer and longer. The shield tunneling method is a fully mechanized construction method for modern tunnel construction. The main mechanical equipment used is the shield tunneling machine. The shield tunneling machine uses the cutter to cut the soil and break the gravel during the tunnel excavation process. However, with the shield tunneling method Due to the application of the shield machine in the excavation of the weathering trough due to the abrasion and cracking of the cutterhead mud cake, the deformation of...

Claims

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Application Information

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IPC IPC(8): E21D9/08E21D11/10E21D21/00
Inventor 王宗勇雷军刘广钧赵香萍李有兵
Owner THE 2ND ENG OF THE 12TH BUREAU GROUP OF CHINA RAILWAY
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