Polyurethane material for reinforcement and restoration of foundation

A polyurethane material and foundation technology, which is applied in the field of foundation reinforcement and repair, can solve the problems of affecting the normal operation of traffic, high cost of digging and refilling, long construction time, etc., and achieve the effect of short construction time, low labor intensity and full filling effect

Inactive Publication Date: 2017-02-15
TIANJIN PIPELINE ENG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the event of subsidence of airport subgrade, highway subgrade subsidence, subway tunnel or high-speed rail tunnel through mountain cracks leading to water seepage, etc., the traditional construction method needs to be used to repair the road surface, and then fill the subsidence parts, resulting in Partial excavation of the cracks and re-reinforcement, the construction time is long and the process is more complicated, which greatly affects the normal operation of traffic
For underground pipelines that have been discarded for many years, when it is necessary to build roads and other pressure-bearing buildings on them, the cost of digging and refilling is too high, and the construction period is long, so a technology that can be quickly poured is needed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Component A includes 9 parts of polyether 210, 4 parts of polyether 6249, 4 parts of polyether 403, 17 parts of polyether 450, 17 parts of polyether 4110, 17 parts of polyether 8345, 4 parts of polyester PS2352, 0.3 parts of water, 7 parts 365MFC, 1.5 parts AK8806, 1.75 parts PC-5, 0.85 parts TMR-2, 0.85 parts PC-9 and 9 parts DBE; Component B is 98 parts isocyanate. Pass component A and component B into the high-pressure foaming machine respectively. The preheating temperature of each component is 25°C, then mix them, and quickly inject them into the place that needs to be repaired and filled. Component A and component B undergo a chemical reaction. Form polyurethane material.

[0030] The viscosity of component A after mixing is 700mPa·s, and the polyurethane material formed can meet the index requirements listed in Table 1.

Embodiment 2

[0032] Component A includes 10 parts of polyether 210, 5 parts of polyether 6249, 5 parts of polyether 403, 18 parts of polyether 450, 18 parts of polyether 4110, 18 parts of polyether 8345, 3 parts of polyester PS3152, 0.3 parts of water, 6 parts 141B, 1.7 parts AK8806, 2 parts PC-5, 1 part TMR-2, 1 part PC-9 and 10 parts DBE; component B is 100 parts isocyanate. Pass component A and component B into the high-pressure foaming machine respectively. The preheating temperature of each component is 25°C, then mix them, and quickly inject them into the place that needs to be repaired and filled. Component A and component B undergo a chemical reaction. Form polyurethane material.

[0033] The viscosity of component A after mixing is 750mPa·s, and the polyurethane material formed can meet the index requirements listed in Table 1.

Embodiment 3

[0035] Component A includes 10 parts of polyether 210, 6 parts of polyether 6249, 6 parts of polyether 403, 17 parts of polyether 450, 17 parts of polyether 4110, 17 parts of polyether 8345, 4.5 parts of polyester PS3152, 0.4 parts of water, 8 parts 141B, 2 parts AK8806, 2 parts A33, 1 part TMR-2, 1 part PC-9 and 9 parts DBE; component B is 120 parts isocyanate. Pass component A and component B into the high-pressure foaming machine respectively. The preheating temperature of each component is 25°C, then mix them, and quickly inject them into the place that needs to be repaired and filled. Component A and component B undergo a chemical reaction. Form polyurethane material.

[0036] The viscosity of component A after mixing is 750mPa·s, and the polyurethane material formed can meet the index requirements listed in Table 1.

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Abstract

The invention provides a polyurethane material for reinforcement and restoration of a foundation. The polyurethane material comprises a component A and a component B in a mass ratio of 1: (1-1.5), wherein the component A comprises, by mass, 39 to 74 parts of monocomponent polyether, 0 to 5 parts of polyester, 0 to 0.4 part of water, 2 to 10 parts of a foaming agent, 1 to 2.5 parts of a foam stabilizer, 1 to 5 parts of a catalyst and 8 to 10 parts of a special auxiliary agent, and the component B is isocyanate. Through mutual cooperation among the above components, the polyurethane material has good grouting effect and good fluidity and can be poured into cracks with small width and exerts better filling effect on a collapsed place; a material obtained through a reaction after pouring has good water resistance and chemical resistance and cost a short period of time to reach desired strength when applied to a to-be-repaired pavement or crack, so time needed in shutting down of a traffic route for construction is short; and the polyurethane material has the advantages of short construction time, small labor intensity, good restoration effect, etc.

Description

technical field [0001] The invention belongs to the technical field of foundation strengthening and repairing, and in particular relates to a polyurethane material for foundation strengthening and repairing. Background technique [0002] With the development of society and economy, people's requirements for travel are getting higher and higher. With the increasing traffic pressure in modern society, the damage of various road surfaces and tunnels is becoming more and more frequent. The demand for restoration technology arises at the historic moment. [0003] In the event of subsidence of airport subgrade, highway subgrade subsidence, subway tunnel or high-speed rail tunnel through mountain cracks leading to water seepage, etc., the traditional construction method needs to be used to repair the road surface, and then fill the subsidence parts, resulting in The excavation and re-reinforcement of the part of the crack will take a long time for the construction and the process ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/48C08G18/42C08G18/79C08J9/14C08G101/00
CPCC08G18/4018C08G18/42C08G18/4804C08G18/791C08G2101/00C08J9/144C08J9/146C08J2203/142C08J2375/08
Inventor 李宪实
Owner TIANJIN PIPELINE ENG GROUP
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