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Light foamed soil for abutment back backfilling and construction method

A light-weight foam and construction method technology, applied in the field of roads and bridges, can solve the problems of bridge head jumping, more maintenance in the later period, and low economic efficiency, etc., and achieve the effect of reducing density, good effect, and convenient use

Inactive Publication Date: 2015-10-28
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
[0005] 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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] A lightweight foam soil used for backfilling of abutments, comprising the following components by weight: cement: 350 parts, mixed material: 80 parts, water: 120 parts, regulator: 35 parts, foaming agent: 10 parts , microfoam agent: 6 parts, waterproofing agent: 5 parts.

[0051] The mixed material in this example includes granulated blast furnace slag.

[0052] The conditioner in this embodiment includes water reducer, rubber powder, reinforcing agent and foam stabilizer.

[0053] In this embodiment, the blowing agent is hydrogen peroxide.

[0054] 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.

[0055] The waterproofing agent described in this embodiment includes an inorganic aluminum salt waterproofing agent.

Embodiment 2

[0057] A lightweight foam soil used for backfilling of abutments, comprising the following components by weight: cement: 220 parts, mixed material: 40 parts, water: 180 parts, regulator: 40 parts, foaming agent: 14 parts , microfoam agent: 8 parts, waterproofing agent: 5 parts.

[0058] The mixed material in this embodiment includes coal gangue.

[0059] The conditioner in this embodiment includes water reducer, rubber powder, reinforcing agent and foam stabilizer.

[0060] In this embodiment, the blowing agent is magnesium oxide.

[0061] 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.

[0062] The waterproofing agent described in this embodiment includes an inorganic aluminum salt waterproofing agent.

Embodiment 3

[0064] A lightweight foam soil used for backfilling abutments, comprising the following components by weight: cement: 300 parts, mixed material: 70 parts, water: 150 parts, regulator: 35 parts, foaming agent: 12 parts , microfoam agent: 7 parts, waterproofing agent: 6 parts.

[0065] The mixed material in this embodiment includes carbide slag.

[0066] The conditioner in this embodiment includes water reducer, rubber powder, reinforcing agent and foam stabilizer.

[0067] In this embodiment, the blowing agent is hydrogen peroxide.

[0068] 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.

[0069] The waterproofing agent described in this embodiment includes an inorganic aluminum salt waterproofing agent.

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PUM

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Abstract

The invention discloses a light foamed soil for abutment back backfilling. The light foamed soil comprises cement, a mixed material, water, a conditioning agent, a foaming agent, a micro-foam agent, and a waterproof agent. The invention also provides a preparation method of light foamed soil for abutment back backfilling. The micro-foam agent is prepared into foams by a plunger pump and an air compressor, the materials are mixed and stirred by a stirrer, and the slurry extraction speed is controlled by a frequency converter so as to control the volume weight of the finished product. The invention also provides an on-site construction method of light foamed soil applied to abutment back backfilling. The light foamed soil provided by the invention belongs to light materials, has small foundation load after filling, greatly reduces the foundation treatment intensity, and saves the foundation treatment duration. After pouring and before initial setting, light foamed soil has very good fluidity and fill self-compaction, avoids the defect of non-full filling of conventional fillers, has strong constructability, and can effectively solve the phenomenon of bumping at bridge head.

Description

technical field [0001] The invention relates to the technical field of roads and bridges, in particular to a lightweight foam soil applied to the backfill of abutments and a construction method. Background technique [0002] The vehicle jumping at the bridge head is due to the differential settlement at the bridge head and the expansion joint (bridge head approach road) or the damage of the expansion joint, which causes the steps on the longitudinal slope of the road surface to cause the vehicle to jump when passing. A certain degree of settlement fracture (the settlement value is generally 10-30cm, and some even exceed 60cm), which will cause jumps and impacts when the vehicle passes, thereby causing additional impact loads on the bridge and road surface, making drivers and passengers feel bumpy and uncomfortable, and even causing The vehicle decelerates significantly, which can lead to serious traffic accidents (especially vehicle mechanical accidents). Therefore, the pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/02C04B38/02C04B18/14C04B18/04
CPCY02W30/91
Inventor 张建华孙明新孙根生李商岳霞张雷张磊
Owner 河南华泰新材科技股份有限公司
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