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A non-uniform settlement control structure for an airfield pavement roadbed passed by a high-speed rail tunnel and a construction process

A settlement control, high-speed rail technology, applied in the directions of roads, roads, buildings, etc., can solve the problems of airport and high-speed rail operation safety, uneven settlement, difficulty, etc., to improve the dispersion of soil stress, which is conducive to stress The effect of dispersing and reducing self-weight

Active Publication Date: 2019-06-14
TONGJI UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the implementation process of the high-speed railway tunnel crossing the airport pavement project, the backfilling of the foundation pit does not meet the requirements, resulting in uneven settlement, and there are frequent cases where reprocessing is required. Reprocessing is difficult and expensive, which is harmful to the safety of the airport and high-speed rail operations. Greater impact

Method used

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  • A non-uniform settlement control structure for an airfield pavement roadbed passed by a high-speed rail tunnel and a construction process
  • A non-uniform settlement control structure for an airfield pavement roadbed passed by a high-speed rail tunnel and a construction process

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Embodiment 1

[0044] Establish a simplified finite element model of the foam lightweight soil foundation under the high-speed railway tunnel passing through the airport pavement, and obtain the foundation of the foam lightweight soil foundation under different thicknesses and moduli by changing the thickness and modulus of the foam lightweight soil Uneven settlement shall be judged in combination with uneven settlement of airport pavement subgrade and settlement requirements (uneven settlement less than 1.5‰, settlement less than 20cm).

[0045] The present invention provides a construction technique for the uneven settlement control structure of a high-speed railway tunnel passing through an airport pavement subgrade, comprising the following steps:

[0046] Step 1: Clean up and level the construction site, remove debris on the top of the tunnel, drain the accumulated water in the foundation pit, and pour plain concrete according to the design requirements after the high-speed rail tunnel is ...

Embodiment 2

[0053] The present invention provides a construction technique for the uneven settlement control structure of a high-speed railway tunnel passing through an airport pavement subgrade, comprising the following steps:

[0054] Step 1: Clean up and level the construction site, remove debris on the top of the tunnel, drain the accumulated water in the foundation pit, and pour plain concrete 1 according to the design requirements after the high-speed rail tunnel is accepted, within the range of 0.5m-1m from the vault top;

[0055] Step 2: After the plain concrete layer has reached the design strength and passed the acceptance check, part of the foundation pit maintenance wall 2 around the plain concrete is removed, and the demolition range is 2m-4m from the bottom elevation of the pavement structure;

[0056] Step 3: After the foundation pit maintenance wall 2 is dismantled to meet the design requirements and pass the acceptance check, the reinforced soil layer 5 is filled layer by ...

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Abstract

The invention discloses a construction process of a non-uniform settlement control structure for an airfield pavement roadbed passed by a high-speed rail tunnel. The construction process comprises thefollowing steps: cleaning and leveling a construction site, and pouring plain concrete; dismantling part of foundation pit maintenance walls; filling a plain soil above the plain concrete in a layered mode, pouring a foam light soil foundation on the plain soil in a segmented, partitioned and layered mode, or laying reinforced soil layers in a layered mode, laying geogrids between the reinforcedsoil layers in a layered mode, laying geocells on the reinforced soil layers in a layered mode, laying broken stones on the geocells, and setting a plurality of deformation joints in the longitudinaldirection; carrying out construction of a pavement structure layer and other ancillary facilities, and forming the roadbed non-uniform settlement control structure after the construction process is finished. The construction process has the advantages that the overall uniformity of the soil foundation is improved, and the non-uniform settlement volume of the soil foundation is adjusted; the construction process is convenient, the construction period is shortened and the problem of uneven settlement of the roadbed when the high-speed rail tunnel passes through the airfield pavement is successfully solved.

Description

technical field [0001] The invention relates to the intersecting fields of airport engineering and high-speed rail engineering, in particular to a structure for controlling uneven settlement of a high-speed rail tunnel passing under an airport pavement subgrade and a construction process. Background technique [0002] In recent years, the number of comprehensive transportation hub projects has increased, and the projects are interlaced three-dimensionally. Moreover, high-speed railways and aircraft are more sensitive to settlement when they are running at high speed, and have higher requirements for settlement and uneven settlement. In the implementation process of the high-speed railway tunnel crossing the airport pavement, the backfilling of the foundation pit does not meet the requirements, resulting in uneven settlement, and there are frequent cases where reprocessing is required. The difficulty and cost of reprocessing are high, which is harmful to the safety of the airp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C3/00E01C3/04
Inventor 张甲峰吕玺琳钱建固王伟李军世苏尔好翁锰森
Owner TONGJI UNIV
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