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Backfilling Method for Inverted Arch of Tunnel in Cold Region

A cold area tunnel and height technology, which is applied to the field of backfilling of invert arches in cold area tunnels, can solve problems such as reducing hydration heat, and achieve the effects of short construction period, convenient construction, and good thermal insulation performance.

Active Publication Date: 2019-05-31
SHAOXING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In view of the above existing problems, the present invention provides a method for backfilling tunnel inverts in cold regions to solve the problems existing in backfilling with plain concrete in the prior art. The generation of heat of hydration during construction has the advantages of simple operation and convenient construction

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  • Backfilling Method for Inverted Arch of Tunnel in Cold Region
  • Backfilling Method for Inverted Arch of Tunnel in Cold Region

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Embodiment 1

[0023] Such as Figure 1~2 As shown, the method for inverting backfilling of tunnels in cold regions provided by the present invention includes:

[0024] ① Obtain the invert curvature, height and invert backfill transverse width W and invert backfill longitudinal length L;

[0025] ② Determine the width L of n standard blocks placed horizontally according to the horizontal width W 2 And the width L of the two end blocks placed on both sides of the n standard blocks 2 ’, where W=n*L 2 +2*L 2 ’, n is an integer greater than or equal to 0;

[0026] ③Mark the n standard blocks placed horizontally as B from left to right 1 ~B n , The left end block is marked as D 1 , The right end block is marked as D 2 To B 1 ~B n Denote standard blocks respectively, with D 1 , D 2 Denote the end blocks respectively.

[0027] ④According to B x Invert backfill height at location h x OK B x Height L 3 x ; According to D 1 Invert backfill height at location h 1 OK D 1 Height L D , According to D 2 Invert bac...

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Abstract

The invention provides a method for backfilling tunnel inverts in cold regions, using prefabricated blocks made of air bubbles mixed with light soil to backfill tunnel inverts in cold regions in sections, which can not only reduce the heat of hydration generated during the construction period, but also Because the prefabricated block of air-bubble mixed light soil is flexible and specially made, it can adapt to the large freeze-thaw deformation caused by tunnel inversion or tunnel pavement structure, and the air-bubble mixed light soil itself has good thermal insulation performance, further protecting Frozen soil in cold regions; at the same time, it has the advantages of simple operation, convenient construction, and short construction period, and is suitable for large-scale application in tunnel inverted arch backfill projects in cold regions.

Description

Technical field [0001] The invention relates to the field of construction, in particular to an invert backfill method for tunnels in cold regions. Background technique [0002] Normally, plain concrete is used as a rigid base for invert backfilling of tunnels, which is easy to crack when uneven deformation occurs, and a large amount of hydration heat will be generated during the construction process, which will aggravate the melting of surrounding rocks around the tunnel; As a backfill material, concrete cannot function well as heat preservation and heat insulation, which intensifies the melting of surrounding rock in the tunnel. Summary of the invention [0003] In view of the above-mentioned problems, the present invention provides a method for invert backfilling of tunnels in cold regions to solve the problems of using plain concrete backfilling in the prior art, which not only takes into account the pavement material and thermal insulation performance, but also fully reduces ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D11/08E21D11/38
CPCE21D11/08E21D11/38
Inventor 夏才初白雪莹杜时贵干志伟李安原
Owner SHAOXING UNIVERSITY