Synchronous Grouting Method and Grouting Slurry for Rectangular Shield Construction
A rectangular shield and synchronous grouting technology, applied in the field of tunnel engineering, can solve the problems of surface deformation, tunnel deformation, and the inability of synchronous grouting method to achieve high fluidity, compressive strength, reinforcement strength, and avoid surface deformation. Effect
Active Publication Date: 2017-05-10
SHANGHAI TUNNEL ENG CO LTD +2
View PDF6 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] The purpose of the present invention is to overcome the defects of the prior art, provide a synchronous grouting method and grouting slurry for rectangular shield construction, and solve the problem that the synchronous grouting method for existing circular shields cannot be applied to rectangular shields and large Under the working condition of the section, problems such as surface deformation and tunnel deformation are prone to occur
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0034] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0035] The invention provides a synchronous grouting method and a grouting slurry for the construction of a rectangular shield. The grouting slurry meets the requirements of the rectangular shield for environmental protection and ring tunnel stability control. The grouting slurry has high fluidity and compressive strength, and the grouting slurry increases the compressive strength of the ground surface and restrains the deformation of the ground surface. Cooperating with the design of the grouting hole and the control of the grouting volume and grouting pressure, the grouting grout can be evenly injected between the pipe joint and the soil layer, and the reinforcement structure can be formed through the grout consolidation, which effectively solves the problems of surface settlement, tunnel convergence deformation, And the problem of tunnel flo...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a synchronous grouting method for rectangular shield construction. The method comprises the steps that grouting slurries are prepared by mixing dry powder including 40 percent by mass of complex portland cement, 50 percent by mass of kelp powder and 10 percent by mass of zeolite powder and swelling agents; a plurality of grouting holes are formed in a case of a rectangular shield; the grouting slurries are simultaneously injected between mounted pipe joints and a soil layer through the grouting holes; the grouting quantity and the grouting pressure of all grouting holes are controlled in the process of injecting the grouting slurries; a gap between the pipe joints and the soil layer is filled through the grouting slurries. Compared with the grouting slurries for an existing round shield, the grouting slurries for the rectangular shield are relatively high in fluidity and high in compressive strength; due to the gap between the pipe joints and the soil layer filled through the grouting slurries, the strength of the soil layer is enhanced, and surface deformation is avoided.
Description
technical field [0001] The invention relates to the field of tunnel engineering, in particular to a synchronous grouting method and grouting slurry for rectangular shield construction. Background technique [0002] The shield synchronous grouting process is an essential key process in shield tunnel construction, and is the key to controlling ground settlement and tunnel stability. The shield synchronous grouting process is to inject grout with certain working performance and strength into the outer gap of the segment ring of the shield tail through the grouting pump while the shield tunneling, so as to fill the outer gap of the segment ring. [0003] At present, the existing shield synchronous grouting technology is aimed at the construction of circular shields. Since the building voids at the top and bottom of rectangular shields are horizontal, the fluidity, filling rate and uniformity of grout injection are relatively circular. Tunnels are bad. Rectangular shield tunnel...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B16/00
Inventor 黄俊肖广良黄德中朱雁飞汤继新郑宜枫李刚吴惠明陈培新方宇林
Owner SHANGHAI TUNNEL ENG CO LTD