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A technology for road surface repair and grouting holes, which is applied in the direction of road, road, bridge maintenance, etc. It can solve the problem of the difference in settlement speed between hard soil layer and soft soil layer, achieve short curing time, reduce construction time, and avoid bridge head jumping Effect
Active Publication Date: 2017-07-21
JIANGSU DINGTAI ENG MATERIAL
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[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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Embodiment 1
[0038] 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.
[0039] The 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 subgrade, it is convenient to drill the soft soil layer 6 from the side. hole.
[0040] Such as figure 1 - Shown in 3, a kind of pavement restoration method of the present invention comprises the following steps:
[0041] (1) Use the three-dimensional detection radar or ultrasonic detection device to detect the position of the gap 3 in the bridge slab of the damaged bridge, mark the position of the gap 3 on the surface of the strap 2, and measure the gap 3 and the hard soil layer 7 depth;
[0042] (2) Mark the position of each grouting hole 8 on the surface of the board 2 above the...
Embodiment 2
[0050] 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 when grouting, and the resin viscosity (exit machine viscosity) that flows out from this grouting equipment ) 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. 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.
[0051] The slurry has the following characteristics:
[0052] (1) The slurry does not contain water, will not shrink when dry, and can densely fill voids; the slurry is flexible and elastic after curing, and is not ...
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Abstract
The invention relates to a pavement rehabilitation method. The pavement rehabilitation method comprises the following steps that detection radar is used for detecting the disengagement position of a butt strap of a damaged bridge, the positions of first grouting holes are marked on the surface of the butt strap and are drilled, the first grouting holes reach a hard stratum and are arranged in an array mode, the center-to-center spacing of the adjacent first grouting holes is 10-20 cm, and the disengagement position falls into the array range; second grouting holes penetrate through the hard stratum and intersect with the first grouting holes, and the two ends of each second grouting hole are provided with one-way valves for exhausting air; the first grouting holes are grouted, the three-dimensional detection radar is used for detecting grout filling conditions in the disengagement position, the first grouting holes and the second grouting holes, and grouting is stopped when the disengagement position, the first grouting holes and the second grouting holes are full of the grout; and after grouting is stopped, the detection radar is used for detecting and examining the filling portions again, and the portions which are not filled with grout are drilled and grouted again. The problem that the sedimentation rates of the hard stratum and a soft soil layer are different is solved through the method.
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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