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Grid reinforcing method of shield receiving or starting end head and shield receiving method

A receiving method and grid-based technology, which is applied in the direction of earth drilling, mining equipment, tunnels, etc., can solve the problems of large-area uplift on the ground, multiple interlayer phenomena, and difficult grouting pressure, so as to save costs, reduce risk rates, and ensure safe effect

Active Publication Date: 2010-06-23
CHINA RAILWAY NO 3 GRP CO LTD
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Problems solved by technology

Although this method effectively makes up for the defects of the first method, that is, it can effectively reinforce the surrounding soil of the tunnel section from the longitudinal direction, but its shortcomings are: on the one hand, it is necessary to achieve the predetermined reinforcement range and effect of grouting pressure. It is difficult to master, and it is easy to cause large-scale uplift of the ground, especially in the bustling areas of the city, which is extremely harmful; The mud layer often becomes a huge source of risk; moreover, this reinforcement method is expensive and only applicable to special projects and is difficult to popularize

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  • Grid reinforcing method of shield receiving or starting end head and shield receiving method
  • Grid reinforcing method of shield receiving or starting end head and shield receiving method
  • Grid reinforcing method of shield receiving or starting end head and shield receiving method

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Embodiment Construction

[0031] The specific embodiment of the present invention will be further described in conjunction with the accompanying drawings.

[0032] The mesh-type reinforcement method of the receiving or originating end of the shield tunneling machine is characterized in that the shield-tunnel receiving or originating end is provided with a mesh-type waterproof reinforcement.

[0033] The specific implementation method of the present invention is: use the horizontal grouting method to follow up the grouting below the lower edge of the designed tunnel in advance to form the watertight bottom layer 9 below, and its scope will be larger than the designed reinforcement zone, and the thickness will be based on the reinforcement of the mixing piles used. It depends on the depth, at least above the effective pile-forming depth of the deep mixing pile. If necessary, it can invade the tunnel design range. Then use mixing piles and high-pressure jet grouting piles in a certain range outside the ma...

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Abstract

The invention belongs to the technical field of shield tunnel construction project and in particular relates to a grid reinforcing method of a shield receiving or starting end head and a shield receiving method. The invention aims at the risk source of starting and receiving shield. In the grid reinforcing method of a shield receiving or starting end head, the shield receiving or starting end head is provided with a grid waterproof reinforcing element. The invention has the advantages of completely cutting off water source compensation during final reception so that a shield machine carries out reception and starting under the geological conditions without water, fundamentally changes the original geological conditions, and ensures the safety of the shield. Compared with the traditional methods, the method saves more than 30% of cost once, the reinforcement effect thereof is greatly higher than that of the traditional method, the method reduces at least more than 70% of risk rate, has inestimable benefit and value as subway construction is carried out like a house on fire currently, and has easy operation, inspection and convenient popularization and promotion.

Description

technical field [0001] The invention belongs to the technical field of shield tunnel construction engineering, and in particular relates to a shield receiving or starting end mesh reinforcement method and a shield receiving method based on the same. Background technique [0002] The existing shield receiving or originating end reinforcement technologies mainly include: [0003] ① The full-section end reinforcement technology of rotary grouting pile + mixing pile method. That is, a certain period of time in advance, the mixing pile is reinforced within a certain range of the tunnel section at the receiving end of the shield machine, and the high-pressure jet grouting pile is used to reinforce the place where the mixing pile is not reinforced or the reinforcement effect is poor. After reinforcement, the mixed soil has a certain strength and The waterproof performance ensures the safe reception of the shield to a certain extent. However, although this method is simple in cons...

Claims

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Application Information

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IPC IPC(8): E21D9/06E21D9/14
Inventor 辛振省张俊兵张拥军游杰徐建中张宇宁
Owner CHINA RAILWAY NO 3 GRP CO LTD
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