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A technology for road surface repair and grouting holes, which is applied in the field of road surface repair, can solve the problems of the difference in settlement speed between hard soil layer and soft soil layer, and achieve the effects of short curing time, reduced construction time, and good impermeability
Active Publication Date: 2016-04-20
JIANGSU DINGTAI ENG MATERIAL
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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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Embodiment 1
[0034] Such as figure 1 As shown, the damaged bridge generally includes: pavement surface 1, slab 2, void 3, bridge surface 4, road surface 5, soft soil layer 6, and hard soil layer 7.
[0035] Void generally occurs between the slab 2 and the soft soil layer 6. The void volume 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 1-3 As shown, a road surface repair method of the present invention includes the following steps:
[0037] (1) Use a three-dimensional detection radar or ultrasonic detection device to detect the void 3 position in the slab of the damaged bridge, mark the void 3 position 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 slab 2 above the void 3 and drill holes. The diameter of the grout...
Embodiment 2
[0046] The slurry described in the present invention uses a high-strength foaming resin whose model is SZ3. The resin is added to the above-mentioned grouting equipment during grouting, and the viscosity of the resin flowing out of the grouting equipment (out-machine viscosity) ) Is 100±45mPa·s. The volume of the resin slurry increases continuously in flow, and its permeability is strong. It is suitable for quickly reaching the void or entering the gap. It is suitable for squeezing out water under pressure. The slurry can be filled and emptied after 3 minutes of injection, and its final strength will be reached after 10 minutes of injection, with its compressive strength ≥20MPa and bending strength ≥15MPa.
[0047] The slurry has the following characteristics:
[0048] (1) The slurry does not contain water, does not produce dry shrinkage, and can be densely filled and void; the slurry is flexible and elastic after curing, and it is not easy to crack. At the same time, the resin mat...
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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 repairing method, which can repair the back of the bridge head abutment and eliminate the phenomenon of vehicle jumping at the bridge head. Background technique [0002] With the continuous increase in the mileage of highways and railways in our country, the proportion of bridges, culverts and other highway structures has become larger and larger. Many such structures have a "bridge head jumping" phenomenon, the so-called "bridge head jumping". It means that the structure itself of bridges, culverts, etc. and the back of the abutment continue to settle due to the driving load and self-weight, and the uneven settlement caused by the inconsistency of the structural settlement and the settlement of the back of the abutment, resulting in steps on the road surface where the back of the abutment and the structure are connected, and driving at high speed The phenomenon of bumps and jumps occurs when the vehicles passing thro...
Claims
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Application Information
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