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Method and structure for reinforcing flat hole grouting roadbed without damaging road surface

A technology for strengthening structures and subgrades, which is applied in infrastructure engineering, roads, roads, etc., can solve the problems of destroying the structural integrity of the pavement, cracking of the pavement structure, and affecting the function and service life of the pavement, so as to ensure the overall integrity and reduce the The effect of grouting pressure, improving grouting efficiency and effect

Active Publication Date: 2014-08-13
CCCC SECOND HIGHWAY CONSULTANTS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantages of this technology are: ①The vertical drilling damages the pavement structure and its integrity. After the grouting reinforcement is completed, the traffic needs to be interrupted for pavement repair and asphalt surface layer to restore the functionality of the pavement; ②Under the traffic load Under the action, the inhomogeneity of the material at the grouting hole position of the reinforced pavement leads to obvious stress concentration, and the pavement structure is prone to new cracks and other early disease phenomena, which affects the function and service life of the pavement

Method used

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  • Method and structure for reinforcing flat hole grouting roadbed without damaging road surface
  • Method and structure for reinforcing flat hole grouting roadbed without damaging road surface
  • Method and structure for reinforcing flat hole grouting roadbed without damaging road surface

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Embodiment 1

[0031] Combine below figure 1 , Figure 5 , the present invention is described in further detail:

[0032] A flat hole grouting roadbed reinforcement method without damaging the road surface, the steps are:

[0033] A. 7 or subgrade Determination of subgrade uneven settlement disease area instability disease area 8, subgrade slope grouting hole location. Draw a grout diffusion square network according to the width of the subgrade working face to be reinforced by grouting and the grout diffusion radius (such as figure 1 As shown), the intersection point of the square grid is taken as the initial plane position of the drilling position, and then the hole depth and inclination angle are determined according to the damage characteristics of the roadbed and the purpose of reinforcement (the uneven settlement area of ​​​​the roadbed is generally 0°~3°, and the instability of the roadbed is controlled The area is generally 20°~45°), and the drilling hole position is adjusted to tr...

Embodiment 2

[0042] according to figure 2 , image 3 , Figure 4 , Figure 6 It can be seen that a flat-hole grouting subgrade reinforcement structure that does not damage the road surface consists of a grouting hole 1, a first-drilled grouting hole 1A, a grouting hole 1B that is drilled alternately, an auxiliary grouting hole 1C, and a grouting pattern. Pipe 2, cement slurry 3, seamless cement grouting outer pipe 4, joint thread 5, hole sealing material 6, roadbed uneven settlement disease area 7, roadbed instability disease area 8, characterized in that: in the grouting hole 1. Install the grouting flower tube 2 and the seamless grouting outer tube 4. The grouting flower tube 2 and the seamless grouting outer tube 4 are connected by joints and threads 5. In the uneven diseased area of ​​the subgrade 7, holes are designed around the outside of the diseased area. Drill holes on the top position to form the grouting hole 1A first, then drill the grouting hole 1B by step-drilling alterna...

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Abstract

The invention discloses a method and a structure for reinforcing flat hole grouting roadbed without damaging road surface. The method comprises the following steps of A. determining the positions of grouting holes; B. drilling horizontal or slant grouting holes to ensure that the drilling angle is orthogonal to the main damaging direction of the roadbed; C. striking the grouting holes in an interlaced mode; D. drilling and grouting from the periphery of the damaged roadbed to the inside; E. arranging grouting floral pipes; F. arranging seamless grouting outer pipes at the front ends of the grouting holes which penetrate through the cross section of the roadbed and are dimensionally and crossly distributed; G. uniformly filling cement grouts and determining grouting pressure through tests and areas; and H. performing sedimentation, inclination, deformation and displacement observation on the roadbed surfaces, structures and surrounding buildings during grouting. Horizontal or inclined drilling is carried out on roadbed slopes in the affected area for forming the grouting holes, the grouting floral pipes and the seamless grouting outer pipes are arranged, and the grouting floral pipes are connected with the seamless grouting outer pipes by virtue of joint by screws. The method is feasible and convenient to carry out; because of no-damage road surface structure, the bearing capacity and the stability of the roadbed structure in the affected area are obviously improved, and the reinforcement effect is high.

Description

technical field [0001] The invention relates to the technical field of roadbed disease prevention and reinforcement, more specifically to a flat hole grouting roadbed reinforcement method that does not damage the road surface, and also relates to a flat hole grouting roadbed reinforcement structure that does not damage the road surface, which uses flat holes The grouting technology treats uneven subsidence and instability and deformation of the subgrade to avoid the damage and destruction of the pavement structure caused by the vertical drilling grouting technology. It has the construction characteristics of not closing the road or blocking the traffic, and the cost of grouting is low. Grouting efficiency and effect are remarkable. Background technique [0002] With the gradual improvement of my country's highway network, the number of engineering diseases that need to be treated during the operation and maintenance of highways has also increased. It is often used in the pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C3/04E02D3/12
Inventor 吴万平阮艳彬张静波程平谢松林何斌王云邓涛吴银亮
Owner CCCC SECOND HIGHWAY CONSULTANTS CO LTD
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