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Shield synchronous grouting serous fluid

A synchronous grouting and shield technology, applied in shaft lining, tunnel lining, underground chamber, etc., can solve the problems of reducing the difficulty of construction management, controlling surface settlement, poor buoyancy ability of tunnels, and difficult construction management, etc., to achieve Guarantee the effect of work efficiency

Inactive Publication Date: 2010-06-16
CHINA RAILWAY 16TH BUREAU GRP CO LTD
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Problems solved by technology

[0008] In order to overcome the difficulty of single-slurry construction management in the past, the control of surface subsidence and the lack of tunnel buoyancy, the patent of the present invention provides a new type of synchronous grouting grout. Strength and shear resistance not only play a significant role in controlling surface settlement and tunnel uplift, but also reduce the difficulty of construction management

Method used

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Embodiment Construction

[0024] According to the performance requirements of the synchronous grouting slurry, the patent of the present invention uses cement and fly ash as the main addition of sand, bentonite and admixtures as the supplementary active slurry as the synchronous grouting slurry for shield construction of the South-to-North Water Transfer Project. In order to meet the good performance of the synchronous grouting under the complex geological conditions of the Yellow River crossing project, a large number of tests have been carried out before the construction to determine the proportion of the synchronous grouting. During the construction process, the application effect of the slurry is continuously used with the aid of a large number of tests. Adjust the mix ratio. The slurry is used in construction, and the achieved use effects are:

[0025] 1. From the perspective of the construction completion section, due to the injection of single liquid slurry, the formed tunnel after construction has...

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Abstract

The invention relates to a novel synchronous grouting serous fluid material applied to shield construction, which features fine anti-permeability and shear resistance. In the invention, based on a large number experiments and application effect of serous fluid in projects, proportioning of synchronous grouting serous fluid under geological conditions in South-to-north Water Diversion and crossing-Yellow-river project is proposed. The serous fluid with such proportioning enjoys fine impermeability and shear resistance in water-rich sand layer with high SPT value. The serous fluid has the characteristics of economy and easy operation.

Description

Technical field [0001] The patent of the invention relates to a new type of synchronous grouting material in shield construction, which has good impermeability and shear resistance. Background technique [0002] At present, there are single-liquid slurry and double-liquid slurry for simultaneous grouting in shield construction. Different slurries are adjusted by adding different materials and different proportions to improve the strength of the slurries, setting time, bleeding rate and workability. Double liquid slurry has the advantages of short initial setting time and high early strength. The disadvantages are: [0003] 1. The double-liquid slurry tends to thicken the slurry near the injection port, so that the injected slurry is easily blocked (i.e., the pipe is blocked) or diluted by groundwater, resulting in uneven strength of the slurry stone body; [0004] 2. Due to the difference in material composition and physical properties, the double-liquid slurry is easier to enter b...

Claims

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Application Information

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IPC IPC(8): E21D11/10E21D9/06
Inventor 陈建军吴庆红方宗银
Owner CHINA RAILWAY 16TH BUREAU GRP CO LTD
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