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A Construction Method of Subgrade Foam Concrete Filling Technology Adjacent to Existing Subway Facilities

A technology with existing subways and construction methods, applied in roads, buildings, roads, etc., can solve the problems of easy cracking of concrete, restricting widespread use, low strength, etc., to increase stability and safety factor, ensure strength, and improve strength. Effect

Active Publication Date: 2020-06-16
ZHEJIANG UNIV CITY COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in actual construction, if the conventional road subgrade is used, the above requirement cannot be met. Therefore, foam concrete is selected, because the performance characteristics of foam concrete mainly include light weight, low density, good thermal insulation, and good pumpability. , strong waterproof ability, material saving
However, considering the surrounding environment of subway tunnels, ordinary foam concrete and construction technology still have some defects, such as low strength, easy cracking or water absorption of concrete, etc., which seriously restrict its wide application in the vicinity of existing subway conditions.

Method used

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  • A Construction Method of Subgrade Foam Concrete Filling Technology Adjacent to Existing Subway Facilities
  • A Construction Method of Subgrade Foam Concrete Filling Technology Adjacent to Existing Subway Facilities
  • A Construction Method of Subgrade Foam Concrete Filling Technology Adjacent to Existing Subway Facilities

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with the examples. The description of the following examples is provided only to aid the understanding of the present invention. It should be pointed out that for those skilled in the art, without departing from the principles of the present invention, some improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0028] The invention prepares the foamed concrete by adjusting the mixing ratio to meet its different strength requirements. like image 3 , Figure 4 As shown, the foam concrete is poured in blocks and layers, divided into 4 sections vertically, left and right sections horizontally, and 2 layers vertically. The same layer of foam concrete, the middle part includes the first position 7 and the second position 8, the lateral side of the first position 7 is the ...

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Abstract

The invention relates to a construction method of a subgrade foam concrete filling technology adjacent to an existing metro facility. The construction method comprises the following steps of measurement and setting-out, foundation pit excavation, template mounting, foam concrete mixing and pouring, steel wire mesh laying and concrete maintenance. Foam concrete is poured in a blocking and layeringmanner and is divided into four sections longitudinally, into a left side and a right side transversely and into two layers vertically. The construction method has the beneficial effects that comparedwith ordinary concrete, the foam concrete has the characteristics of light weight, high strength, energy conservation and waste utilization; the advantages of the foam concrete is effectively exertedwhile the strength is improved; and in addition, by utilizing the foam concrete with different strengths for blocking and layering filling, the cost can be effectively saved, and the purposes of economy and effectiveness are achieved. By adopting the construction method provided by the invention, the additional load after subgrade soil replacement can be effectively reduced, the strength is ensured, the stability and safety coefficients of road engineering are increased, the engineering cost can also be lowered at the same time, the maintenance cost is reduced, and the social benefit is increased.

Description

technical field [0001] The invention relates to the technical construction field of roadbed foam concrete filling adjacent to existing subway facilities, in particular to a construction method of roadbed foam concrete filling technology adjacent to existing subway facilities. Background technique [0002] With the rapid development of the subway, new roads often cross the subway in many areas. According to the requirements of the design code, the covering soil load on the subway tunnel or station structure must be within the range that the structure can bear. If a road project is built above it, the load of the road structure layer will inevitably exceed the original covering soil load, so corresponding measures must be taken when constructing above the subway to reduce the additional load on its upper part. Under the principle of "maintaining the original state and maintaining balance as much as possible" for the upper load, the subgrade of the upper road within the scope o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01C3/04
CPCE01C3/04
Inventor 丁智华琦张霄周联英
Owner ZHEJIANG UNIV CITY COLLEGE
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