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Roadbed structure applied to road widening and construction method

A construction method and roadbed technology, which is applied in the direction of infrastructure engineering, roads, roads, etc., can solve the problems of complicated process, compactness not up to the design standard, and uneven settlement of the joint parts at the junction of old and new roadbeds. The effect of inaccurate bulk density, good fluidity and simple process

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

Road widening can make it easier for people to travel and reduce traffic pressure, but the construction technology, effect and problems of existing road widening are worth exploring
[0003] At present, after the completion of the road widening and reconstruction project, many pavements often have longitudinal and transverse cracks and other diseases. The reasons for the above problems mainly include: 1) The material of the subgrade and the thickness and strength of the pavement structure layer at the junction of the old and new subgrades after widening treatment are different, In particular, the quality of the new subgrade is different from that of the original old subgrade, and a critical surface is formed at the junction, which leaves hidden dangers for road cracking; 2) After the new and old subgrades are widened, the settlement at the junction is not First, there is a certain settlement difference, especially the newly widened roadbed has a large post-construction settlement, while the old roadbed has completed a considerable amount of post-construction settlement, so it is inevitable to produce a sudden change in the settlement difference at the joint site, which becomes the road The main reason for the cracks; 3) The technology of the junction of the new and old subgrades is more complicated, and the construction is more difficult, and there are often artificial quality factors here, such as the compactness does not meet the design standards, etc.

Method used

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  • Roadbed structure applied to road widening and construction method
  • Roadbed structure applied to road widening and construction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] The filling material described in the present invention is made of the following components by weight: 180 parts of cement, 20 parts of silica fume powder, 50 parts of diatomaceous earth, 30 parts of expanded perlite, 160 parts of water, 5 parts of water reducing agent, 10 parts of rubber powder, 25 parts of plant fiber, 12 parts of foaming agent, and 6 parts of microfoaming agent.

[0073] Cement described in the present invention is P.O42.5 cement.

[0074] The water reducer in the present invention is a polycarboxylate water reducer.

[0075] The foaming agent described in the present invention is a HT composite foaming agent.

[0076] The microfoaming agent described in the present invention is prepared by diluting the foaming agent with water at a ratio of 1:2000, and microfoaming by a plunger pump.

Embodiment 2

[0078] The filling material described in the present invention is made of the following components by weight: 350 parts of cement, 5 parts of silica fume powder, 1 part of diatomaceous earth, 20 parts of expanded perlite, 200 parts of water, 3 parts of water reducing agent, 1 part rubber powder, 15 parts plant fiber, 8 parts foaming agent, 10 parts microfoaming agent.

[0079] The cement described in the present invention is preferably P.O52.5 cement.

[0080] The water reducer in the present invention is a polycarboxylate water reducer.

[0081] The foaming agent described in the present invention is a HT composite foaming agent.

[0082] The microfoaming agent described in the present invention is prepared by diluting the foaming agent with water at a ratio of 1:2000, and microfoaming by a plunger pump.

Embodiment 3

[0084] The filling material described in the present invention is made of the following components by weight: 260 parts of cement, 30 parts of silica fume powder, 20 parts of diatomaceous earth, 70 parts of expanded perlite, 120 parts of water, 1 part of water reducing agent, 8 parts of rubber powder, 5 parts of plant fiber, 5 parts of foaming agent, and 2 parts of microfoaming agent.

[0085] The cement described in the present invention is preferably P.O42.5R cement.

[0086] The water reducer in the present invention is a polycarboxylate water reducer.

[0087] The foaming agent described in the present invention is a HT composite foaming agent.

[0088] The microfoaming agent described in the present invention is prepared by diluting the foaming agent with water at a ratio of 1:2000, and microfoaming by a plunger pump.

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Abstract

The invention relates to a road building structure and a construction method field. A roadbed structure applied to road widening comprises a new road layer, a filling material layer, a broken stone cushion layer, a concrete retaining wall and an original roadbed slope, wherein the original roadbed slope is finished as a step shape; the concrete retaining wall is arranged on the reciprocal nth step of the step-shaped roadbed slope; the surface of the reciprocal n-1th step of the step-shaped roadbed slope is an inclined surface; the broken stone cushion layer is laid on the surface of the bottom layer of the step-shaped roadbed slope; the filling material layer and the new road layer are arranged at the upper part of the broken stone cushion layer in sequence; and the filling material layer is prepared by cement, silicon fume powder, kieselguhr, expanded perlite, water, a water reducing agent, rubber powder, planet fibers, a foaming agent and a micro foam agent. The roadbed structure can be applied to the road widening, can perform the vertical filling to save the land and to reduce the demolition, can largely reduce the filling load to reduce the differential settlement of new and old roadbeds in soft-foundation road sections, and is short in construction period.

Description

technical field [0001] The invention relates to a road building structure and a construction method, in particular to a roadbed structure and a construction method for road widening. Background technique [0002] With the increasing economic development and traffic volume, many highways in our country need to be widened. Road widening can make it easier for people to travel and reduce traffic pressure, but the construction technology, effect and problems of existing road widening are worth exploring. [0003] At present, after the completion of the road widening and reconstruction project, many pavements often have longitudinal and transverse cracks and other diseases. The reasons for the above problems mainly include: 1) The material of the subgrade and the thickness and strength of the pavement structure layer at the junction of the old and new subgrades after widening treatment are different, In particular, the quality of the new subgrade is different from that of the or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C3/00E02D17/20E02D29/02C04B28/04C04B38/10
Inventor 张建华李文唐璐李商岳志成华振贵柳建张磊
Owner 河南华泰新材科技股份有限公司
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