Cement concrete pavement slab edge concealed grouting and void risk evaluation method

Abstract

The invention discloses a cement concrete pavement slab edge concealed grouting and void risk evaluation method. The method comprises the steps of determining a grouting area, forming a hidden drill hole, grouting in the hidden drill hole, marking, blocking the hidden drill hole, obtaining the maximum envelope area of a void area, determining the maximum grouting depth, obtaining the actual grouting amount, obtaining the grouting depth of a unit area, obtaining a void threat index, evaluating the void risk of the grouting area and the like. The method has the advantages that 1) the implementation is simple; the existing airport pavement grouting process is innovated, and the construction quality and the grouting effect can be ensured. (2) the concealment is strong; holes are drilled in the joint positions of the pavement, and pavement caulking is used for covering after hole sealing, so that the complete performance of the pavement structure can be guaranteed. And 3) the void risk evaluation is accurate. The maximum depth and the average grouting depth of the iron oxide-containing cement paste tested by the ground penetrating radar are creatively proposed and synthesized, and the risk degree of plate bottom void can be effectively quantified and evaluated.

Description

technical field [0001] The invention belongs to the technical field of airport engineering, and in particular relates to a method for concealed grouting on the edge of a cement concrete road slab and a risk assessment method for voiding. Background technique [0002] Under the combined influence of aircraft take-off and landing cyclic loads and water damage, most of the lower part of the runway slab joints of the airport runway have different degrees of hollowing out of the slab bottom. When using a heavy hammer deflection meter to test the deformation of the edge and corner of the board, it often shows that the deformation of the panels on both sides of the joint is extremely uneven. During the ground penetrating radar test, the void area will form an abnormal echo area. If it is not treated, it will cause serious problems such as emptying, falling edges and corners, and even broken boards. [0003] However, in the practice of pavement management, the commonly used method...

AI Technical Summary

Problems solved by technology

However, for runway slabs that have been used for 5 to 20 years, the airport management department often does not adopt this method because of the damage to the runway structure.

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