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Construction method for shield launching by short sleeve

A construction method and short sleeve technology, which are used in wellbore lining, earthwork drilling, tunnel lining and other directions, can solve problems such as the inability to ensure the sealing of the tunnel door, and achieve the effects of simple structure, cost saving and less muddy water work.

Active Publication Date: 2018-11-20
CHINA RAILWAY 12TH BUREAU GRP +1
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Problems solved by technology

[0003] In order to solve the problem of tunnel shield starting under unstable soil geological conditions, the invention relies on the traditional door rubber cord board and door pressing plate to seal the door, which cannot ensure the sealing of the door during the shield starting process. As well as the problem of establishing effective earth pressure in the soil silo, a construction method using a short sleeve for shield initiation is provided

Method used

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  • Construction method for shield launching by short sleeve
  • Construction method for shield launching by short sleeve
  • Construction method for shield launching by short sleeve

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Embodiment

[0065] The Tel Aviv Red Line light rail project in Israel has a total length of 23.5km, of which 12km is an underground project, with 10 underground stations. The underground section connecting the station is two approximately parallel shield section tunnels. The inner diameter of the shield tunnel is 6.5m, the outer diameter is 7.2m, and the segment thickness is 35cm. The Dongbiao section project includes two depots, three underground stations, and five shield sections.

[0066] The second section of the project is from Em hamoshavot station to Geha (Geha / Chamber1 / 5 / 2 / 6) bifurcation section. Two shield machines start from a vertical shaft (5 / 8 Shaft) to excavate Line 6 and Line 5 to Geha (Geha / Chamber1 / 5 / 2 / 6) bifurcation section respectively.

[0067] The interval tunnel passes through mainly fine sand, mixed sand and K1 and K2 strata in the Kukar stratum. The Kukar stratum is a mixture of sand and calcareous sandstone. The strata are divided into K1, K2, K3 and The stabil...

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Abstract

The invention belongs to the technical field of subway tunnel shield construction, particularly relates to a construction method for shield launching by a short sleeve, and solves the problems that during the shield launching of existing tunnel construction, tunnel doors are sealed by traditional tunnel door rubber curtain cloth plates and tunnel door pressing plates and water tightness of the tunnel doors and establishment of effective soil pressure in soil bins during shield launching cannot be ensured. The short sleeve comprises a short sleeve guide ring and a sealing steel ring. Accordingto the construction method, the short sleeve guide ring, the sealing steel ring and a guide ring concrete ring frame beam are combined and connected for shield launching. Compared with traditional endjet grouting reinforcement, the method has high construction speed, and can realize effective sealing of shield construction without pipeline relocation and traffic relief, and the situation that development of shield construction is restricted by the shield launching for a long time is redefined.

Description

technical field [0001] The invention belongs to the technical field of subway tunnel shield construction, and in particular relates to a construction method for shield tunnel initiation by using a short sleeve. Background technique [0002] At present, urban subway construction has shown a blowout development in major cities in my country, and the preferred construction method for subway interval tunnels is undoubtedly the shield method. In the starting stage of the shield machine, safety accidents such as sand gushing, water penetration, and collapse may occur at the portal, especially in the geological conditions of rich water and soft soil, due to water gushing and sand gushing, the ground at the end will subside, collapse, and even buildings collapse. Major accidents such as flooded and buried shield tunnels are on the rise. However, for water-rich sand layer geology or similar geology, the surrounding environment is complex and the originating end of the shield does no...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/14E21D9/06E21D11/18E21D11/10E21D11/00
CPCE21D9/0607E21D9/14E21D11/003E21D11/10E21D11/18
Inventor 怀平生郭银新李天胜李建军赵香萍李晓焦钢白晓岭姚八五
Owner CHINA RAILWAY 12TH BUREAU GRP
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