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Repair method of bridge head jumping road surface to solve the difference in settlement speed between hard and soft soil layers

A repair method and bridge jumping technology, applied in bridge maintenance, bridges, bridge parts, etc., can solve problems such as the difference in settlement velocity between hard soil layers and soft soil layers, achieve short curing time, reduce construction time, and avoid bridge jumping. The effect of car phenomenon

Active Publication Date: 2017-06-30
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 method for repairing the bridge head jumping road surface, which can solve the problem of the difference in settlement speed between the hard soil layer and the soft soil layer

Method used

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  • Repair method of bridge head jumping road surface to solve the difference in settlement speed between hard and soft soil layers
  • Repair method of bridge head jumping road surface to solve the difference in settlement speed between hard and soft soil layers
  • Repair method of bridge head jumping road surface to solve the difference in settlement speed between hard and soft soil layers

Examples

Experimental program
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Effect test

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 repair method of bridge head jumping 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 void 3 and drill the...

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 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 during the flow, and its penetration ability 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.

[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 elas...

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Abstract

The invention relates to a bridge-head vehicle bump road surface repairing method for solving the problem of the settling velocity difference between a hard soil layer and a soft soil layer. The bridge-head vehicle bump road surface repairing method comprises the steps that a void position in an access board of a damaged bridge is detected through detection radar, the positions of first grouting holes are marked on the surface of the access board, drilling is conducted on the positions of the first grouting holes, the first grouting holes are deep enough to reach the hard soil layer, the first grouting holes are arranged in an array mode, the center-to-center distance between every two adjacent first grouting holes is 10-20 cm, and the void position is made to be located within the array range; all second grouting holes penetrate through the soft soil layer and intersect with the first grouting holes, and exhaust one-way valves are arranged at the two ends of each second grouting hole; grouting is conducted on the first grouting holes, the void position and the internal grout filling conditions of all the first grouting holes and all the second grouting holes are detected immediately through three-dimensional detection radar, and grouting is stopped when the void position, all the first grouting holes and all the second grouting holes are filled with grout; and the filling positions are detected and re-checked again through the detection radar after grouting is stopped, and the positions which are not filled with grout are drilled and grouted again. By the adoption of the bridge-head vehicle bump road surface repairing method, 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 method for repairing vehicle jumping road surface at the bridge head, which can repair the back of the bridge head platform 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 pi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01D22/00E01D19/12
CPCE01D19/125E01D22/00
Inventor 张腊花陈凯董军
Owner JIANGSU DINGTAI ENG MATERIAL
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