A flat hole grouting roadbed reinforcement method and structure without damaging the road surface

A subgrade and grouting technology, applied in infrastructure engineering, roads, roads, etc., can solve problems such as damage to the structural integrity of the pavement, cracking of the pavement structure, affecting the use function and service life of the pavement, to ensure the overall integrity, reduce The effect of grouting pressure, improving grouting efficiency and effect

Active Publication Date: 2016-06-15
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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  • A flat hole grouting roadbed reinforcement method and structure without damaging the road surface
  • A flat hole grouting roadbed reinforcement method and structure without damaging the road surface
  • A flat hole grouting roadbed reinforcement method and structure without damaging the 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 , Image 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 alternat...

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Abstract

The invention discloses a flat hole grouting subgrade reinforcement method and structure without damaging the road surface. The steps are: A. determining the hole position of the grouting hole; B. drilling a horizontal or oblique grouting hole; The main direction is orthogonal; C, the grouting holes are drilled alternately; D, the inward grouting is drilled from the periphery of the roadbed lesion; E, the grouting flower tube is installed; F, the front end of the grouting holes arranged in a three-dimensional staggered way through the cross section of the roadbed Install the seamless grouting outer pipe; G. Inject cement slurry evenly, and the grouting pressure is determined by the test and the area; H. During the grouting process, observe the settlement, inclination, deformation and displacement of the subgrade pavement, structures and surrounding buildings. The grouting hole is formed by horizontal or oblique dry drilling of the subgrade slope in the diseased area, and the grouting flower pipe and the seamless grouting outer pipe are installed, and the grouting flower pipe and the seamless grouting outer pipe are connected by joints and screws. The method is easy to operate and the operation is simple and convenient. It does not damage the pavement structure, significantly improves the bearing capacity and stability of the subgrade structure in the diseased area, and the reinforcement effect is remarkable.

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 Patents(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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