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Earth pressure balance jacking construction method for water-rich shallow-buried large-section rectangular jacking tube

A rectangular pipe jacking and construction method technology, which is applied in earth-moving drilling, wellbore lining, tunnel lining, etc., can solve problems such as low construction efficiency, and achieve the effect of reducing personnel costs, ensuring normal operation, and ensuring safety.

Pending Publication Date: 2021-10-19
THE SECOND ENG CO LTD OF CHINA RAILWAY 14TH CONSTR BUREAU CO LTD
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Problems solved by technology

[0004] Aiming at the problems of water gushing, landslides, and low construction efficiency in the face of the traditional excavation of water-rich shallow-buried large-section channels, the present invention provides a construction method for rich-water shallow-buried large-section rectangular pipe jacking with earth pressure balance jacking. Solve the above technical problems

Method used

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  • Earth pressure balance jacking construction method for water-rich shallow-buried large-section rectangular jacking tube

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Embodiment 1

[0033] The following takes Taiyuan City Rail Transit Line 2 Phase I Project Station Auxiliary Structure Rectangular Passage Project as an example to illustrate. The Changfeng Street Station crossing passage passes through Changfeng Street, Taiyuan City, and will be constructed from May 28, 2020 to June 29, 2020, with a jacking distance of 91.9 meters. The specific method is as follows:

[0034] (1) Construction preparation

[0035] Formulate construction schemes, normative standards and construction plans; determine the construction environment and construction work surface.

[0036] (2) Construction of working well and receiving well

[0037] Dewatering wells are arranged, and tube wells are used for dewatering. The diameter of the tube well is Φ600mm, and the bottom of the tube well is 3 meters deep into the lower part of the rectangular channel. The well pipe adopts sand-free concrete pipe with an outer diameter of Φ400mm and an inner diameter of Φ320mm. Two precipitati...

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Abstract

The invention relates to an earth pressure balance jacking construction method for a water-rich shallow-buried large-section rectangular jacking tube, and belongs to the technical field of underground passage construction. The earth pressure balance jacking construction method comprises the following steps of construction preparation; construction of a working well and a receiving well; installation of a jacking device and a retaining device; selection of a tube push bench; jacking construction through the tube push bench; tube joint supporting and circumferential grouting; and thixotropic slurry replacement. According to the earth pressure balance jacking construction method, by means of measures such as construction precipitation and manual sealing, water seepage in a construction space can be avoided, water gushing of a working face can be avoided, and the construction safety is greatly guaranteed; through a mechanical excavation method of the tube push bench and a tube joint prefabricating and supporting method, the construction excavation efficiency is improved, the construction period is greatly shortened, and meanwhile, the personnel cost is reduced; and through tube joint circumferential grouting, construction process settlement control and ground surface settlement monitoring, the ground surface settlement value can be effectively reduced, and normal operation of ground traffic and safety of ground surface buildings (structures) can be guaranteed. The earth pressure balance jacking construction method is suitable for complex geological conditions and environmental conditions.

Description

technical field [0001] The invention relates to the technical field of underground channel construction, in particular to a construction method for earth pressure balance jacking of rectangular pipe jacking with rich water, shallow burial and large cross-section. Background technique [0002] With the large-scale construction of urban subway projects and municipal tunnel projects in our country, more and more urban cross-street passage projects have emerged as the times require. Since the urban street crossing crosses the main road of the city, in order not to affect the normal operation of the ground, and to maintain the safety of the ground buildings (structures), the construction technology and construction method of the urban street crossing are also developing rapidly. [0003] The traditional drilling and blasting excavation method has large construction disturbances, high construction safety risks, and complicated construction procedures; the traditional manual excava...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/00E21D11/00E21D11/08E21D11/10
CPCE21D9/00E21D9/003E21D11/00E21D11/08E21D11/10
Inventor 袁洋高清照李宁吴冬李腾王永余徐帮树张万志王晨光刘秀芝
Owner THE SECOND ENG CO LTD OF CHINA RAILWAY 14TH CONSTR BUREAU CO LTD
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