Reinforcing method for high-speed railway karez foundation

A technology for high-speed railways and foundations, applied in infrastructure engineering, applications, household appliances, etc., can solve problems such as large project investment, long bridge length, and elevation, and achieve the effects of ensuring safe operation, improving strength, and good water permeability

Pending Publication Date: 2022-02-11
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has the problems of raising the railway line position, long bridge length, and large project investment.

Method used

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  • Reinforcing method for high-speed railway karez foundation
  • Reinforcing method for high-speed railway karez foundation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] figure 1 , figure 2 Shown, a kind of embodiment of the present invention is, a kind of reinforcement method of high-speed railway Karez foundation, comprises the following steps:

[0033] A. Buried slurry interception barrier

[0034] The vertical wells at both ends of the culvert section 3 under the high-speed railway embankment to be reinforced in the Karez foundation are used as the boundary shaft 2a; on the outside of the boundary shaft 2a and the junction, a slurry interception barrier 6 composed of multi-layer geotextiles is buried.

[0035] B. Set the grouting pipe

[0036] Connect the beginning end of the grouting pipe 4 with the high-pressure grouting pump 9 on the ground, and the tail end of the grouting pipe 4 extends from a boundary shaft 2a into the underdrain 3 and reaches another boundary shaft 2a; and the grouting pipe 4 is located in the underdrain A plurality of grouting holes 5 are opened on the pipe wall in 3;

[0037] C. Preparation of slurry ...

Embodiment 2

[0044] A method for strengthening the Karez foundation of a high-speed railway, comprising the following steps:

[0045] A. Buried slurry interception barrier

[0046] The vertical wells at both ends of the culvert 3 section under the high-speed railway subgrade to be reinforced in the Karez foundation are used as the boundary shaft 2a; on the outside of the boundary shaft 2a and the junction, a slurry interception barrier 6 composed of multi-layer glass fiber mesh cloth is buried ;

[0047] B. Set the grouting pipe

[0048] Connect the beginning end of the grouting pipe 4 with the high-pressure grouting pump 9 on the ground, and the tail end of the grouting pipe 4 extends from a boundary shaft 2a into the underdrain 3 and reaches another boundary shaft 2a; and the grouting pipe 4 is located in the underdrain A plurality of grouting holes 5 are opened on the pipe wall in 3;

[0049] C. Preparation of slurry

[0050] The label of 250 parts of quality is the ordinary portlan...

Embodiment 3

[0056] A method for strengthening the Karez foundation of a high-speed railway, comprising the following steps:

[0057] A. Buried slurry interception barrier

[0058] The vertical wells at both ends of the culvert 3 section under the high-speed railway subgrade to be reinforced in the Karez foundation are used as the boundary shaft 2a; on the outside of the boundary shaft 2a and the junction, a slurry interception barrier 6 composed of multi-layer glass fiber mesh cloth is buried ;

[0059] B. Set the grouting pipe

[0060] Connect the beginning end of the grouting pipe 4 with the high-pressure grouting pump 9 on the ground, and the tail end of the grouting pipe 4 extends from a boundary shaft 2a into the underdrain 3 and reaches another boundary shaft 2a; and the grouting pipe 4 is located in the underdrain A plurality of grouting holes 5 are opened on the pipe wall in 3;

[0061] C. Preparation of slurry

[0062] The label of 350 parts of quality is the ordinary portlan...

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Abstract

The invention discloses a reinforcing method for a high-speed railway karez foundation. The reinforcing method comprises the following steps that A, slurry intercepting barriers are embedded in boundary vertical shafts at the two ends of a closed conduit section in the karez foundation to be reinforced; B, the tail end of the grouting pipe extends into the closed conduit from one boundary vertical shaft and reaches the other boundary vertical shaft; a plurality of grouting holes are formed in the pipe wall, located in the closed conduit, of the grouting pipe; C, 250-350 parts by mass of cement and 1200-1400 parts by mass of coal gangue with the particle size being 10-20 mm are prepared into slurry with the water cement ratio being 0.25-0.45; D, a high-pressure grouting pump is used for injecting the slurry prepared in the step D into the closed conduit between the boundary vertical shafts through a grouting pipe, and the closed conduit is filled with the slurry; maintaining is performed for 2-3 days; and E, the boundary vertical shafts and other vertical shafts between the boundary vertical shafts are filled with gravels or pebbles with the particle size of 20-50 mm or solid waste near the construction site. According to the method, the original water storage and drainage functions of the karez are kept, and safe operation of the high-speed railway can be guaranteed; and meanwhile, operation is convenient, safe and environment-friendly, cost is saved, and engineering investment increase is small.

Description

technical field [0001] The invention relates to a method for reinforcing the foundation of a high-speed railway, in particular to a method for reinforcing the foundation of a high-speed railway Karez. Background technique [0002] Karez is a kind of irrigation and water delivery structure used in desert areas. Its main components are shafts, underground culverts, surface open channels and "lao dams" (small reservoirs). Its working principle is: in the undercurrent of the alpine snowfield, look for the water source, and then from the high water source to the low ground open channel, drill shafts with gradually shallower depths from top to bottom according to a certain interval, and then pass through the bottom of the shaft. Digging of culverts connects water sources, shafts and open channels on the ground, so as to divert groundwater from high places to open channels on the ground and "dams" on the ground; the "dams" store water and open channels on the ground for irrigation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D15/04C04B28/04C04B38/00
CPCE02D15/04C04B28/04C04B2201/50C04B2111/00284C04B18/12C04B22/16C04B2103/302C04B38/0041
Inventor 刘先峰张冲张炎飞袁胜洋宋瑾阳田凯元
Owner SOUTHWEST JIAOTONG UNIV
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