Unlock instant, AI-driven research and patent intelligence for your innovation.

Double shield tbm closed ring construction method

A construction method and closed-loop technology, which are applied in earth-moving drilling, wellbore lining, tunnel lining, etc., can solve the problems of "unclosed" effect, unsatisfactory closed-loop production effect, unintuitive construction operation, etc. Filling and adhesion of voids, small loss of fluidity, avoidance of cracks or fissures

Active Publication Date: 2018-01-19
SINOHYRDO ENG BUREAU 3 CO LTD
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional method of closed loop is to use double liquid slurry, water glass and coagulant to spray coagulate through the chemical irrigation pipe, and form a ring-shaped condensation between the outer wall of the segment and the rock wall to form a closed loop. This method is due to the construction The operation is not intuitive, there are blind spots, and the production effect of the closed loop is very unsatisfactory, and the closed "effect" is often not achieved

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 more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Double shield tbm closed ring construction method
  • Double shield tbm closed ring construction method
  • Double shield tbm closed ring construction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The double-shield TBM closed loop construction method of this embodiment includes the following steps:

[0030] Step 1. Select the following raw materials:

[0031] a. Cement;

[0032] B. colloidal coagulant; said colloidal coagulant is formed by stirring, distilling and pulverizing successively by konjac glucomannan, carbonate, rheological agent, dispersant, early strength agent and water, said The amount of colloidal coagulant is 4% of the cement mass;

[0033] C. sand; the addition of described sand is equal to cement quality;

[0034] d. water; the addition of said water is 35% of the total mass of cement, colloid coagulant and sand;

[0035] In this embodiment, the preparation method of the colloidal coagulant is as follows: firstly add konjac glucomannan, carbonate, rheological agent, dispersant and early strength agent to fully dissolve respectively, and then fully dissolve The obtained konjac glucomannan solution, carbonate solution, rheological agent soluti...

Embodiment 2

[0049] The double-shield TBM closed loop construction method of this embodiment includes the following steps:

[0050] Step 1. Select the following raw materials:

[0051] a. Cement;

[0052] B. colloidal coagulant; said colloidal coagulant is formed by stirring, distilling and pulverizing successively by konjac glucomannan, carbonate, rheological agent, dispersant, early strength agent and water, said The amount of colloidal coagulant added is 5% of the cement mass;

[0053] c. sand; the addition of the sand is 100% of the cement quality;

[0054] d. water; the addition of said water is 30% of the total mass of cement, colloid coagulant and sand;

[0055] In this embodiment, the preparation method of the colloidal coagulant is as follows: firstly add konjac glucomannan, carbonate, rheological agent, dispersant and early strength agent to fully dissolve respectively, and then fully dissolve The obtained konjac glucomannan solution, carbonate solution, rheological agent sol...

Embodiment 3

[0069] The double-shield TBM closed loop construction method of this embodiment includes the following steps:

[0070] Step 1. Select the following raw materials:

[0071] a. Cement;

[0072] B. colloidal coagulant; said colloidal coagulant is formed by stirring, distilling and pulverizing successively by konjac glucomannan, carbonate, rheological agent, dispersant, early strength agent and water, said The amount of colloidal coagulant is 3% of the cement mass;

[0073] c. sand; the addition of the sand is 50% of the cement quality;

[0074] d. water; the addition of said water is 40% of the total mass of cement, colloid coagulant and sand;

[0075] In this embodiment, the preparation method of the colloidal coagulant is as follows: firstly add konjac glucomannan, carbonate, rheological agent, dispersant and early strength agent to fully dissolve respectively, and then fully dissolve The obtained konjac glucomannan solution, carbonate solution, rheological agent solution, ...

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

PropertyMeasurementUnit
lengthaaaaaaaaaa
Login to View More

Abstract

The invention provides a double-shield TBM closed loop construction method which comprises the following steps of 1, selecting raw materials, namely cement, a colloid thickening time control agent, sand and water; 2, adding the raw materials into a forced mixer, and stirring the raw materials to obtain pasty mortar; 3, determining a manual operation location; and 4, conveying the pasty mortar to the manual operation location, then smearing the pasty mortar at the periphery of the front end of an assembly so as to fill gaps between the assembly and pea gravels and gaps between the assembly and surrounding rocks, and performing hardening to obtain a complete closed loop. According to the double-shield TBM closed loop construction method, the colloid thickening time control agent is used in the closed loop construction process, so that combination of the pasty mortar with pipe sections and the surrounding rocks is facilitated, furthermore the coagulation time can be adjusted, shrinkage of the cement pasty mortar can be inhibited, the cement pasty mortar is free from shrinkage but has an microdilatancy effect after being coagulated, occurrence of cracks or gaps is effectively avoided. The double-shield TBM closed loop construction method is simple and intuitive in construction operation, free from construction dead zone and quite ideal in closed loop manufacturing effect, and the closed loop is excellent in closure effect.

Description

technical field [0001] The invention belongs to the technical field of TBM construction, and in particular relates to a novel construction method of a double-shield TBM closed loop. Background technique [0002] During the double-shield TBM construction process, backfill grouting is required after the segments are lined, and when backfilling grouting, in order to quickly start the pressure and ensure the quality of the grouting, it is necessary to grout in sections, so a closed ring needs to be made. [0003] The traditional method of closed loop is to use double liquid slurry, water glass and coagulant to spray coagulate through the chemical irrigation pipe, and form a ring-shaped condensation between the outer wall of the segment and the rock wall to form a closed loop. This method is due to the construction The operation is not intuitive, there are blind spots, and the production effect of the closed loop is very unsatisfactory, and the closed "effect" is often not achiev...

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
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): E21D9/06E21D11/08E21D11/10C04B28/06
CPCC04B28/065E21D9/0607E21D11/08E21D11/105C04B24/38C04B22/10C04B24/20C04B22/08C04B14/06
Inventor 赵书杰陈忠伟盛连才胡昌春李娟
Owner SINOHYRDO ENG BUREAU 3 CO LTD