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Pavement repairing method capable of resolving settlement velocity difference between hard soil and soft soil

A technology for road surface repair and hard soil layer, applied in the direction of road, road, bridge maintenance, etc., can solve problems such as the difference in settlement velocity between hard soil layer and soft soil layer, achieve short curing time, reduce construction time, and avoid bridgehead jumping. Effect

Active Publication Date: 2014-09-17
JIANGSU DINGTAI ENG MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a pavement repair method that can solve the problem of the difference in settlement speed between hard soil layer and soft soil layer

Method used

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  • Pavement repairing method capable of resolving settlement velocity difference between hard soil and soft soil
  • Pavement repairing method capable of resolving settlement velocity difference between hard soil and soft soil
  • Pavement repairing method capable of resolving settlement velocity difference between hard soil and soft soil

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Effect test

Embodiment 1

[0034] Such as figure 1 As shown, the damaged bridge generally includes: pavement 1, slab 2, void 3, bridge deck 4, road surface 5, soft soil layer 6, and hard soil layer 7.

[0035] Void generally occurs between the strap 2 and the soft soil layer 6, and the volume of the void will gradually increase with the settlement of the soft soil layer. Since the soft soil layer 6 is higher than the roadbed, it is convenient to drill the soft soil layer 6 from the side. hole.

[0036] Such as figure 1 - Shown in 3, a kind of pavement restoration method of the present invention comprises the following steps:

[0037] (1) Use a three-dimensional detection radar or an ultrasonic detection device to detect the position of the void 3 in the slab of the damaged bridge, mark the position of the void 3 on the surface of the slab 2, and measure the void 3 and the hard soil layer 7 depth;

[0038] (2) Mark the position of each grouting hole 8 on the surface of the board 2 above the void 3 an...

Embodiment 2

[0046]The slurry described in the present invention adopts a kind of high-strength foaming resin, and its model is SZ3, and this resin is added in the above-mentioned grouting equipment during grouting, and the viscosity of the resin flowing out from the grouting equipment (exit machine viscosity ) is 100±45mPa·s, the volume of the resin slurry increases continuously in the flow, and its permeability is strong, which is suitable for quickly reaching the empty part or entering the gap, and is suitable for discharging accumulated water under the action of pressure. When the above The slurry can be filled and voided after 3 minutes of injection, and its final strength can be reached after 10 minutes of injection. The compressive strength is ≥20MPa, and the bending strength is ≥15MPa.

[0047] The slurry has the following characteristics:

[0048] (1) The slurry does not contain water, will not shrink when dry, and can densely fill voids; the slurry is flexible and elastic after c...

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Abstract

The invention relates to a pavement repairing method. The method comprises the following steps: using radar detection to detect the void position in the slab of s damaged bridge, marking the position of grouting holes 1 on the slab surface of locating and drilling, wherein the grouting holes reach the hard soil and are arranged in array, center distance of adjacent grouting holes is 10-20 cm and the void falls into the array range; penetrating the grouting holes 2 through the soft soil and intersecting with grouting holes 1, and arranging exhaust one-way valves at two ends of each grouting hole 2; grouting into the grouting holes 1 and using three-dimensional radar to detect the slurry grouting condition in the void, grouting holes 1 and grouting holes 2 on a real-time basis, and filling the void, the grouting holes 1 and grouting holes 2 with slurry, and stopping grouting; and after grouting, using detection radar to detect and review the filling portions, and re-drilling and grouting the position without slurry filling. The method solves the problem of settlement velocity difference between hard soil and soft soil.

Description

technical field [0001] The invention relates to a road surface repair method, which can repair the back of the bridge head and eliminate the phenomenon of vehicle jumping at the bridge head. Background technique [0002] With the continuous increase of highway and railway mileage in our country, the proportion of highway structures such as bridges and culverts is increasing. The phenomenon of "bridge head jumping" is common in the backfill of many such structures, so-called "bridge head jumping" It refers to the uneven settlement of bridges, culverts and other structures themselves and the back of the platform due to the effect of driving load and self-weight. The vehicles that pass through the backfill of the platform produce bumps and jumps. [0003] The main reason for the above phenomenon is that generally the bridge deck is higher than the road surface and is connected to the roadbed (hard soil layer) through bridge piers. Therefore, the bridge deck with a height diffe...

Claims

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Application Information

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IPC IPC(8): E01C3/04
CPCE01C11/005E01D22/00
Inventor 宋妍曈陈赞冷一杰
Owner JIANGSU DINGTAI ENG MATERIAL
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