Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A special viscosifier for shield synchronous grouting material

A simultaneous grouting and tackifier technology, applied in the field of tunnel construction, to achieve the effects of good stretchability, improved water dispersion resistance, and good fluidity

Active Publication Date: 2020-09-04
CCCC WUHAN HARBOR ENG DESIGN & RES
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, the seawater slurry conditioner is only used in the engineering mud of bored piles in the marine environment, and has not been applied in other environments.

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 special viscosifier for shield synchronous grouting material
  • A special viscosifier for shield synchronous grouting material
  • A special viscosifier for shield synchronous grouting material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] As shown in Table 1, the synchronous grouting material tackifier consists of the following components by weight ratio:

[0026] Silica fume 92%; polyacrylamide 6%; seawater slurry conditioner 2%;

[0027] Among them: the specific surface area of ​​silica fume is 15000-20000m 2 , the particle size is above 3000 mesh, the molecular weight of polyacrylamide is 6-12 million, the seawater slurry conditioner is the seawater slurry conditioner disclosed in the patent number ZL 2014 1 0036474.1, the molecular weight is 2×10 6 ~1.5×10 7 .

Embodiment 2

[0029] As shown in Table 1, the synchronous grouting material tackifier consists of the following components by weight ratio:

[0030] Silica fume 92%; polyacrylamide 4%; seawater slurry conditioner 4%;

[0031] Among them: the specific surface area of ​​silica fume is 15000-20000m 2 , the particle size is above 3000 mesh, the molecular weight of polyacrylamide is 6-12 million, the seawater slurry conditioner is the seawater slurry conditioner disclosed in the patent number ZL 2014 1 0036474.1, the molecular weight is 2×10 6 ~1.5×10 7 .

Embodiment 3

[0033] As shown in Table 1, the synchronous grouting material tackifier consists of the following components by weight ratio:

[0034] Silica fume 92%; polyacrylamide 2%; seawater slurry conditioner 6%;

[0035] Among them: the specific surface area of ​​silica fume is 15000-20000m 2 , the particle size is above 3000 mesh, the polyacrylamide molecular weight is 6-12 million, the seawater slurry conditioner is the seawater slurry conditioner disclosed in the patent number ZL 2014 1 0036474.1, the molecular weight is 2×10 6 ~1.5×10 7 .

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
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a shield synchronous grouting material special tackifier characterized by comprising the following components by the mass percentage: 85-95% of silica fume; 2-8% of polyacrylamide; and 2-10% of a seawater slurry regulator, wherein the sum of the mass percentages of the components is 100%. The tackifier can greatly improve the anti-water dispersity of a shield synchronous grouting material, reduces the water bleeding rate and the stratification degree of the material, prevents strong duct piece floating ability, improves the stability of the material, improves the comprehensive performance of the material, makes the 28 d land and water strength ratio of a synchronous grouting liquid reach 90% or more, and can well adapt to conditions of high-pressure water-rich strata.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, in particular to a special tackifier for shield synchronous grouting materials. Background technique [0002] The synchronous grouting technology is that when the shield is advanced to the end of the shield and the segment is separated from the segment, an over-excavated gap appears on the back of the segment. In order to avoid deformation of the ground and cause destructive effects on adjacent structures, the After the tail of the shield is detached, it is a construction method of filling the back of the segment with consolidating grout. The main purpose of synchronous grouting is: (1) to fill the gap in the shield tail building in time, support the rock mass around the segment, and effectively control the surface settlement; (2) ensure the early stability of the segment lining and the sealing of the gap, and prevent the (3) As the first line of defense for lining waterproofing, it ...

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): C04B24/38C04B103/44
CPCC04B40/0039C04B2103/44C04B18/146C04B24/2652C04B24/38C04B22/002C04B24/14C04B24/10C04B24/383C04B24/04C04B14/102C04B14/06
Inventor 吴克雄李顺凯明阳屠柳青张思朱志刚韦鹏亮叶仙松
Owner CCCC WUHAN HARBOR ENG DESIGN & RES
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com