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Pavement restoration method

A pavement repair and grouting hole technology, applied in the field of pavement repair, can solve problems such as the difference in settlement velocity between hard soil layers and soft soil layers, and achieve the effects of short curing time, reducing construction time, and avoiding bridge jumping.

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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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] like 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] like 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 and dril...

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 restoration method. The pavement restoration method comprises the steps that a detection radar is utilized for detecting the void positions in a butting plate of a damaged bridge, the positions of grouting holes I are marked on the surface of the butting plate and are drilled, and the grouting holes I are deep to a hard soil layer, and are distributed in an array mode; the distance between the centers of the adjacent grouting holes is 10-20cm and the void positions fall in the array range; all grouting holes II penetrate through a soft soil layer and are intersected with the grouting holes I; the two ends of all the grouting holes are provided with exhausting one-way valves; grouting is carried out on the grouting holes I, and the three-dimensional detection radar is utilized for detecting the filling conditions of slurry in the void positions, all the grouting holes I and all the grouting holes II, and the grouting is stopped when the void positions, all the grouting holes I and all the grouting holes II are filled with slurry; after the grouting is stopped, the detecting radar is utilized for detecting and rechecking the filled parts, and drilling and grouting are carried out again on the parts without being filled with the slurry. The pavement restoration method has the advantage that the problem of the settling velocity difference between the hard soil layer and the soft soil layer is solved.

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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Patent Type & Authority Applications(China)
IPC IPC(8): E01D22/00E01C21/00
Inventor 陈国贤何伟兴吴国平
Owner JIANGSU DINGTAI ENG MATERIAL
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