Method for repairing bridgehead abutment position of road surface
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A technology of abutment back and opposite road, which is applied in the field of repairing the bridge head abutment back of the road surface, which can solve the problems of the difference in settlement speed between hard soil layer and soft soil layer, etc., and achieve short curing time, good sealing effect, and good impermeability sexual effect
Active Publication Date: 2014-09-17
JIANGSU DINGTAI ENG MATERIAL
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[0005] The technical problem to be solved by the present invention is to provide a method for repairing the back of the bridge head and abutment on the road surface, which can solve the problem of the difference in settlement speed between the hard soil layer and the soft soil layer
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Embodiment 1
[0035] 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.
[0036] 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.
[0037] Such as figure 1 -Shown in 3, the method for repairing the bridgehead abutment back of the road surface of the present invention comprises the following steps:
[0038] (1) Use the three-dimensional detection radar 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 depth of the void 3 and the hard soil layer 7;
[0039] (2) Mark the position of each grouting hole 8 on the surface of the board 2 above the v...
Embodiment 2
[0047]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 during the flow, and its permeability is strong. It is suitable for quickly reaching the empty part or entering the gap. 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.
[0048] The slurry has the following characteristics:
[0049] (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 prone to cracking. At the same time, the resin material has good impermeability,...
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Abstract
The invention relates to a method for repairing a bridgehead abutment position of a road surface. The method comprises the steps that a detecting radar is used for detecting the void position in a damaged bridge approach slab, the positions of first injected holes are marked in the surface of the approach slab and are drilled, the first injected holes reach a hard soil layer, the first injected holes are arranged in an array way, the central distance of the adjacent first injected holes is 10-20cm, the void position drops in the array range, second injected holes communicate a soft soil layer and are intersected with the first injected holes, the two ends of each second injected hole are provided with an exhaust single-way valve respectively, the first injected holes are grouted, a three-dimensional detecting radar is used for detecting the void position and the slurry filling condition inside the first injected holes and the second injected holes in time, and when the void position, the first injected holes and the second injected holes are filled with the slurry, the grouting is stopped; the detecting radar is used again for detecting and re-checking the filling position after the grouting is finished, and the positions which are not filled with the slurry are drilled and grouted again. The method solves the problem that the hard soil layer and the soft soil layer are different in sinking speed.
Description
technical field [0001] The invention relates to a method for repairing the back of the bridgehead on the road surface, which can repair the back of the bridgehead and eliminate the phenomenon of vehicle jumping at the bridgehead. 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. Therefo...
Claims
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