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

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...

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

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