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Bridge span reduction method and special-purposed bridge span reduction backfill material

A technology of bridges and mixed materials, applied in the field of bridge span reduction and special bridge span reduction backfill material, can solve the problems of incapable of solving the problem of jumping at the bridge head, much maintenance in the later period, and poor economy, and achieves the reduction of density, good effect, and good use. handy effect

Inactive Publication Date: 2015-11-04
河南华泰新材科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The whole work process must be meticulous, the materials must be suitable, the construction period is longer, and the later maintenance is more, but it still cannot solve the problem of bridge head jumping, it can only be alleviated but not cured
[0006] It can be said that 70% of the maintenance cost of the bridge is spent on the repair of the jumping vehicle at the bridge head. However, the traditional technology is still used for the backfill of the abutment at present. It is only to improve the bearing capacity of the foundation. Not only is it difficult to solve the problem fundamentally, There are also problems such as long construction period and low economy

Method used

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  • Bridge span reduction method and special-purposed bridge span reduction backfill material
  • Bridge span reduction method and special-purposed bridge span reduction backfill material

Examples

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Effect test

Embodiment 1

[0053] A special bridge span reduction and backfill material, comprising the following components by weight: cement: 350 parts, mixed material: 80 parts, water: 120 parts, regulator: 35 parts, foaming agent: 10 parts, microfoaming agent: 6 parts, waterproofing agent: 5 parts.

[0054] The mixed material in this example includes granulated blast furnace slag.

[0055] The conditioner in this embodiment includes water reducer, rubber powder, reinforcing agent and foam stabilizer.

[0056] Foaming agent is coconut acid diethanolamide in the present embodiment.

[0057] The cement used in this example is PC42.5 cement, and the microfoaming agent is prepared by diluting the foaming agent and water at a ratio of 1:2000 and microfoaming by a plunger pump.

[0058] The waterproofing agent described in this embodiment includes an inorganic aluminum salt waterproofing agent.

Embodiment 2

[0060] A special bridge span reduction and backfill material, comprising the following components by weight: cement: 220 parts, mixed material: 40 parts, water: 180 parts, regulator: 40 parts, foaming agent: 14 parts, microfoaming agent: 8 parts, waterproofing agent: 5 parts.

[0061] The mixed material in this embodiment includes coal gangue.

[0062] The conditioner in this embodiment includes water reducer, rubber powder, reinforcing agent and foam stabilizer.

[0063] In this embodiment, the foaming agent is liquid silica gel.

[0064]The cement used in this example is PC42.5 cement, and the microfoaming agent is prepared by diluting the foaming agent and water at a ratio of 1:2000 and microfoaming by a plunger pump.

[0065] The waterproofing agent described in this embodiment includes an inorganic aluminum salt waterproofing agent.

Embodiment 3

[0067] A special bridge span reduction and backfill material, comprising the following components by weight: cement: 300 parts, mixed material: 70 parts, water: 150 parts, regulator: 35 parts, foaming agent: 15 parts, microfoaming agent: 7 parts, waterproofing agent: 6 parts.

[0068] The mixed material in this embodiment includes carbide slag.

[0069] The conditioner in this embodiment includes water reducer, rubber powder, reinforcing agent and foam stabilizer.

[0070] In this embodiment, the foaming agent is coconut acid diethanolamide: the ratio of liquid silica gel is 2:1.

[0071] The cement used in this example is PC42.5 cement, and the microfoaming agent is prepared by diluting the foaming agent and water at a ratio of 1:2000 and microfoaming by a plunger pump.

[0072] The waterproofing agent described in this embodiment includes an inorganic aluminum salt waterproofing agent.

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Abstract

The invention provides a bridge span reduction method and a special-purposed bridge span reduction backfill material. The material comprises the following components, by weight, 150-400 parts of cement, 20-120 parts of a mixed material, 50-200 parts of water, 15-50 parts of a regulator, 5-15 parts of a foaming agent, 2-10 parts of a micro-foaming agent, and 5-10 parts of a waterproofing agent. The lightweight foam soil provided by the invention is lightweight and has high strength. The material has a good overall performance. With the material, a soft soil area soil bearing capacity can be satisfied, and the bearing capacity of a backfilled foundation to the upper load can be satisfied. The load of a special subgrade is reduced, and subgrade settlement is reduced.

Description

technical field [0001] The invention relates to the technical field of roads and bridges, in particular to a bridge span reduction method and a special bridge span reduction backfill material. Background technique [0002] When the overpass bridge across the road is high, the conventional construction method is to solve the problem of the length of the conical slope at the back of the abutment. The result is that the total length of the bridge is often much greater than the required width of the road to be crossed. Originally, the problem of crossing the road that can be solved by a one-span bridge needs to be solved by at least three spans. There is a quality risk in the abutment; in order to resist the earth pressure, the cost of the pile foundation and abutment body of the thin-walled abutment must be greatly increased. [0003] The differential settlement at the bridge head and expansion joints (bridge head approach road) of conventional highways or the damage of the ex...

Claims

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Application Information

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IPC IPC(8): C04B38/02C04B28/00C04B28/04E02D17/18
Inventor 张建华吴波成华振贵宋昊罡吕文朴楚风尘孙根生张磊
Owner 河南华泰新材科技股份有限公司
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