Soil body improvement method of rectangular shield construction

A rectangular shield and soil technology, which is applied in the direction of earth drilling, mining equipment, tunnels, etc., can solve the problems of affecting the stability of the excavation surface, aggravating the disturbance of the ground, and being unable to adapt to the rectangular excavation surface, so as to reduce the size of the soil Effects of consolidation and mudcake phenomena, earth pressure equalization, and effect enhancement

Active Publication Date: 2015-04-08
SHANGHAI TUNNEL ENG CO LTD +2
View PDF6 Cites 5 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 and provide a soil improvement method for rectangular shield construction, which solves the problem that the existing soil improvement method cannot

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
  • Soil body improvement method of rectangular shield construction
  • Soil body improvement method of rectangular shield construction
  • Soil body improvement method of rectangular shield construction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0031] The invention provides a soil improvement method for rectangular shield construction, and provides corresponding improvement methods for two X-shaped spoke-type circular cutter heads, a rectangular soil bin, and two screw machines of the rectangular shield. An asymmetric injection port is set on the cutter head, combined with the circular rotation of the cutter head, the foam injected into the cutter head can be evenly distributed, improving the improvement effect. Due to the rectangular structure of the soil bin, it is prone to consolidation and mud cake phenomenon. Correspondingly, the soil bin is divided into the left area, the right area, and the upper area. The left and right areas are injected with bentonite mud for improvement, and the upper area is continuously injected with foam for improvement. The soil consolidation and mud ca...

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
Viscosityaaaaaaaaaa
Login to view more

Abstract

The invention relates to a soil body improvement method of rectangular shield construction. The soil body improvement method comprises the following steps of arranging an improved injection hole in each cutterhead spoke of a rectangular shield; carrying out region division on a soil cabin in the rectangular shield to divide the soil cabin into a left region, a right region and an upper region; in the rectangular shield construction, carrying out soil body improvement on foam injected from the improved injection hole; carrying out soil body improvement on bentonite slurry injected from the left region and the right region; carrying out soil body improvement on foam which is continuously injected from the upper region of the soil cabin. The invention provides the applicable soil body improvement method aiming at the rectangular shield construction so that full-section improvement of a cutterhead and the soil body is realized; uniform soil properties and balanced soil pressure in each region are ensured, and the influences on the shield construction by the soil pressure are reduced.

Description

technical field [0001] The invention relates to the field of tunnel engineering, in particular to a soil improvement method for rectangular shield construction. Background technique [0002] The earth pressure balance method is used for tunnel construction, and the excavated soil is used as a stable medium to support the excavation surface during construction. The medium should have good plasticity, certain cohesion, small internal friction angle and permeability coefficient, etc. . The existing practice is to add improvement additives to improve the soil during the excavation process. The improvement additives are generally foam and bentonite mud. Through the injection of a certain proportion of foam and bentonite mud, the cut soil is improved to ensure the excavation. Face stability and tunneling efficiency. [0003] However, the existing soil improvement methods are all aimed at the construction of circular shields. For the construction of rectangular shields, the soil ...

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
IPC IPC(8): E21D9/08
CPCE21D9/001E21D9/08
Inventor 朱雁飞黄德中黄俊李刚刘喜东陈培新寇晓勇李培楠
Owner SHANGHAI TUNNEL ENG 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