Narrow space shield construction machine starting method

A shield machine and space technology, which is used in earth-moving drilling, wellbore lining, tunnel lining, etc., can solve the problems of shield machine starting method, vertical and horizontal reinforcement in narrow spaces with construction risks, etc., to avoid risks. , reduce the floor space and reduce the effect of disturbing residents

Inactive Publication Date: 2017-07-28
CENT SOUTH UNIV +4
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a narrow shield that can solve the technical problem that the starting construction position of the existing shield machine is facing complex conditions and cannot be reinforced in the vertical and horizontal directions, thereby causing construction risks. Starting method of space shield machine

Method used

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  • Narrow space shield construction machine starting method
  • Narrow space shield construction machine starting method
  • Narrow space shield construction machine starting method

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Embodiment approach

[0053] Base point embedding: The base point should be buried in a stable area outside the scope of settlement influence, and should be buried in a place with a wide view and good visibility conditions; the number of base points should be set according to the need, and the base point should be firm and reliable.

[0054] Embedding of settlement measuring points: Drill holes on the surface with a percussion drill, then put in round-head steel bars with a length of 200mm to 300mm and a diameter of 20mm to 30mm, and fill the surroundings with cement mortar.

[0055] Measurement method: The observation method adopts the precise leveling measurement method. The initial elevation is obtained by joint measurement of the base point and nearby benchmarking points. During the observation, the tolerances should be strictly controlled, and the reading height difference of each measuring point should not exceed 0.3mm. For observation points that are not on the leveling route, one measuring ...

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Abstract

The invention discloses a narrow space shield construction machine starting method. The method comprises the following steps that 1, a layered replacement mode from bottom to top is adopted for the replacement of a starting hole door, and the pre-existing even wall is replaced with plain soil concrete; a steel ring of the starting hole door is lengthened, so that a shield construction starting end head is strengthened, the predetermined effect is obtained, and the smooth starting of a shield construction machine is guaranteed; 2, the shield construction machine is subjected to examination, maintenance and debugging; 3, shield construction starting is conducted through a counterforce frame and a negative ring pipe slice. Additional reinforcement is not needed for the stratum outside a starting well and an end head stratum, the floor space of the starting well can be reduced, so that the influence on the surrounding traffic can be lowered to the minimum, the construction can be achieved without the need for surrounding pipelines to be changed, the investment and the resident disturbance are reduced, the method accords with the truth, and the method is economical and reasonable. The method is applied to the construction in the situation that the well of starting end head of the shield construction machine cannot be strengthened.

Description

technical field [0001] The invention relates to a tunnel construction method, in particular, to a starting method for a shield machine in a narrow space under unconventional conditions. Background technique [0002] The starting of the shield machine is one of the most risky links in shield construction, and preventing accidents such as collapse and gushing is the focus of construction. [0003] The conventional launch plan of the shield machine is: the formation outside the launch shaft is reinforced by the outer row of jet grouting piles, chemical slurry reinforcement method, freezing method, etc. However, the reinforcement effect of the end formation reinforcement method and the chemical slurry reinforcement method often cannot achieve the expected effect, and the construction cost of the freezing method is expensive. If the tunnel is deeply buried and the groundwater pressure is high, conventional reinforcement methods will not be able to meet the requirements of safe c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/08E21D11/10E21D11/38
CPCE21D9/08E21D11/107E21D11/38
Inventor 付鹤林杨坤梁新权蒋华春杨世鹏黄伟于艺林陈峰李丰果
Owner CENT SOUTH UNIV
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