A shield opening method under pressure for strong air-permeable and water-permeable formations

A technology for shield belts and formations, which is applied in earthwork drilling, underground chambers, shaft equipment, etc., and can solve problems such as limited film formation, strength durability, water resistance, and limited range of formation reinforcement, and achieve high Promoting the effect of app value

Active Publication Date: 2021-06-08
CHINA TIESIJU CIVIL ENG GRP CO LTD
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still some shortcomings in the current method of opening warehouses under pressure: 1. For some special complex strata and sensitive surface environments, it still has limitations; 2. The surface grouting reinforcement method in the current method is limited. "Surface environment", "pre-grouting reinforcement position" and "stratum reinforcement effect"; 3. In the current method, the advanced grouting reinforcement method in the cave is limited by the "construction period", "ground reinforcement scope" and "reinforcement effect". "; 4. The filling method in the current method is limited by the "construction period"; 5. The freezing method in the current method is limited by the "construction period", "cost" and "geological conditions"; 6. The current method The method of injecting bentonite into the soil bin is limited by the film formation, strength, durability and water resistance of the "mud film"; 7. The current method of building a mud film with Zhonghengdun mud is limited by the "construction period" and "economy"

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
  • A shield opening method under pressure for strong air-permeable and water-permeable formations
  • A shield opening method under pressure for strong air-permeable and water-permeable formations

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A shield tunneling method under pressure for strong air-permeable and water-permeable formations in this embodiment includes the following steps:

[0034] S1. It is planned to release the hinges of the 1~3 rings before the shield is shut down with pressure to open the bin gradually, and carry out the ring sealing operation on the fifth ring after the shield tail; among them, when releasing the hinges, the hinge length needs to be extended by 100mm for the follow-up knife The disk retreats to form a mud film to reserve space; when performing the ring sealing operation, inject 200kg of polyurethane into the shield, and use the second grouting double liquid slurry to seal the ring.

[0035] S2. Transport the bentonite slurry produced by the ground mortar mixing station into the tunnel, and then use the mortar pump to pump the bentonite slurry into the mortar tank of the shield machine.

[0036] S3. Add water glass with a design volume of 1 / 3 volume in the synchronous groutin...

Embodiment 2

[0049] A shield tunneling method under pressure for strong air-permeable and water-permeable formations in this embodiment includes the following steps:

[0050] S1. It is planned to release the hinges of the 1~3 rings before the shield is shut down with pressure to open the bin, and seal the fifth ring after the tail of the shield; among them, when releasing the hinges, the hinge length needs to be extended by 150mm for the follow-up knife The disk retreats to form a mud film to reserve space; during the ring sealing operation, 300kg of polyurethane is injected into the Zhongdun, and the ring is sealed with double-slurry grouting for the second time.

[0051] S2. Transport the bentonite slurry produced by the ground mortar mixing station into the tunnel, and then use the mortar pump to pump the bentonite slurry into the mortar tank of the shield machine.

[0052] S3. Add water glass with a design volume of 1 / 3 volume in the synchronous grouting box of the shield machine, and ...

Embodiment 3

[0065] A shield tunneling method under pressure for strong air-permeable and water-permeable formations in this embodiment includes the following steps:

[0066] S1. It is planned to release the hinges of the 1~3 rings before the shield is shut down with pressure to open the bin gradually, and carry out the ring sealing operation on the fifth ring behind the shield tail; among them, when releasing the hinges, the hinge length needs to be extended by 125mm for the subsequent knife The disk retreats to form a mud film to reserve space; during the ring sealing operation, 250kg of polyurethane is injected into the Zhongdun, and the ring is sealed with double-slurry grouting for the second time.

[0067] S2. Transport the bentonite slurry produced by the ground mortar mixing station into the tunnel, and then use the mortar pump to pump the bentonite slurry into the mortar tank of the shield machine.

[0068] S3. Add water glass with a design volume of 1 / 3 volume in the synchronous ...

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

No PUM Login to view more

Abstract

The invention relates to the field of building construction, and provides a method for opening a shield under pressure for strong air-permeable and water-permeable formations. The method mixes a mixed slurry according to a specific mixing ratio, and injects the mixed slurry according to a certain process flow. Go to the soil bin of the shield machine to form a pressure-holding mud film with a certain thickness, strength, water resistance, and durability on the outer wall of the shield and in front of the excavation face of the shield machine, and then turn on the pressure-holding system to gradually remove the compound clay in the bin Until it is convenient for personnel to enter the warehouse for operation. The invention can effectively improve the safety, stability, durability and economy of shield tunneling under pressure for opening and maintaining pressure in strong air-permeable and water-permeable formations and sensitive surface environments, and has high popularization and application value in shield tunneling projects.

Description

technical field [0001] The invention relates to the field of building construction, in particular to a method for opening a shield tunnel under pressure for strong air-permeable and water-permeable formations. Background technique [0002] Shield opening under pressure has been widely used in shield tunnel construction because of its good practicability for complex stratum environments with poor self-stability and high permeability. However, there are still some shortcomings in the current method of opening warehouses under pressure: 1. For some special complex strata and sensitive surface environments, it still has limitations; 2. The surface grouting reinforcement method in the current method is limited. "Surface environment", "pre-grouting reinforcement position" and "stratum reinforcement effect"; 3. In the current method, the advanced grouting reinforcement method in the cave is limited by the "construction period", "ground reinforcement scope" and "reinforcement effect...

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): E21D9/06E21D9/08E21D11/10C04B28/26
CPCC04B28/26C04B2111/00724E21D9/06E21D9/0607E21D9/08E21D11/10C04B22/064C04B14/104C04B24/383
Inventor 夏童飞金平赵双根梁超陆跃王圣涛杨仲杰赵星赵志祥张乔
Owner CHINA TIESIJU CIVIL ENG GRP CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap