Gravel roadbed backfilling construction method

A construction method and subgrade technology, which can be used in foundation structure engineering, roads, excavation, etc., can solve problems such as subgrade settlement easily, and achieve better anti-settling effect, better stability and anti-settling ability.

Active Publication Date: 2020-12-08
韶关市新城兴建筑工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to improve the defect that the subgrade is prone to settlement, the application provides a construction method for backfilling the sandstone subgrade

Method used

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  • Gravel roadbed backfilling construction method
  • Gravel roadbed backfilling construction method

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Embodiment Construction

[0052] The following is attached Figure 1-2 The application is described in further detail.

[0053] The embodiment of the present application discloses a construction method for backfilling a gravel subgrade.

[0054] refer to figure 1 and figure 2 , a construction method for backfilling a gravel subgrade, comprising the following steps:

[0055] S1. Remove rubbish around the roadbed, and dig a foundation pit 1 on the ground. The side walls on both sides of the length direction of the foundation pit 1 are relatively inclined. The cross-sectional area of ​​the foundation pit 1 gradually increases from top to bottom to ensure that the foundation pit Under the premise that the excavation of foundation pit 1 is smooth, the stability of the bottom of foundation pit 1 is improved;

[0056] S2. Compacting the bottom wall of the foundation pit 1 to a depth of not less than 10 cm, so that the soil at the bottom of the foundation pit 1 is more compact, and preliminary subgrade se...

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Abstract

The invention relates to a gravel roadbed backfilling construction method. The construction method comprises the following steps that S1, garbage around a roadbed is removed, and a foundation pit is dug in the ground; S2, the bottom wall of the foundation pit is compacted, and the pressing depth of the bottom wall of the foundation pit is not smaller than 10 cm; S3, a fixing assembly is laid on the inner side wall of the foundation pit, and the side wall of the foundation pit is fixed; S4, a metal cage net is placed at the inner bottom of the foundation pit, a plurality of reinforcing columnspenetrating through the metal cage net are inserted into the inner bottom wall of the foundation pit, the bottom ends of the reinforcing columns are inserted into soil below the foundation pit, and concrete is poured into the metal cage net to form a metal cage net layer; S5, the upper portion of the metal cage net is filled with gravel, and a gravel layer is formed; S6, a plurality of fixing columns are inserted into the gravel layer, concrete is poured on the gravel layer to form a concrete layer, and the fixing columns are located in the gravel layer and the concrete layer at the same time;and S7, a pavement layer and a waterproof layer are sequentially and fixedly laid on the upper surface of the concrete layer. The method has the effect of reducing the settlement probability of the roadbed.

Description

technical field [0001] The present application relates to the technical field of roadbed construction, in particular to a method for backfilling a sandstone roadbed. Background technique [0002] The subgrade is the foundation of the track or road surface, and it is a geotechnical structure formed by excavation or filling; the main function of the subgrade is to provide the necessary conditions for the laying of the track or road surface and the operation of the train or driving, and to bear the track and rolling stock or the road surface and traffic The static load and dynamic load of the load transmit and spread the load to the depth of the foundation at the same time; on the vertical section, the subgrade must ensure the elevation required by the line; on the plane, the subgrade is connected with bridges and tunnels to form a complete through line; In engineering, subgrade plays an important role in terms of construction quantity, floor area and investment. [0003] Exis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C3/00E02D17/02E02D17/04
CPCE01C3/00E02D17/02E02D17/04
Inventor 林俊雄孔志平张彬
Owner 韶关市新城兴建筑工程有限公司
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