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A Construction Method for Multi-Arch Rectangular Tunnel by Arch Division

A construction method and tunnel technology, applied to artificial islands, water conservancy projects, infrastructure projects, etc., can solve the problems of large amount of concrete pouring, long intervals between cement tankers, and easy occurrence of cold joints, etc. Solidity is easy to control, reducing the effect of cold seam

Active Publication Date: 2021-06-22
CHINA RAILWAY CONSTR GRP INFRASTRUCTURE CONSTR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In addition, the traditional construction method has a large amount of single concrete pouring, and the pouring time ranges from 8 to 12 hours. Due to traffic problems in the city, the interval between the front and back of the cement tanker is also long, and the cement before and after it often begins to set. The tanker has just arrived, such pouring is prone to cold seams

Method used

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  • A Construction Method for Multi-Arch Rectangular Tunnel by Arch Division
  • A Construction Method for Multi-Arch Rectangular Tunnel by Arch Division
  • A Construction Method for Multi-Arch Rectangular Tunnel by Arch Division

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Such as Figure 1 to Figure 3 shown, including the following steps:

[0033] Step 1: Divide the multi-arch tunnel into arches according to motor vehicle tunnel 1 and non-motor vehicle tunnel 2;

[0034] Step 2: Construction of support piles and water-stop curtains;

[0035] Step 3: Excavation of the foundation pit, first excavated to 20cm below the floor elevation of the non-motor vehicle tunnel 2;

[0036] Step 4: Keep the undisturbed soil of the non-motor vehicle tunnel 1 sub-arch, continue to excavate the foundation pit of the motor vehicle tunnel 1 part to 20cm below the floor elevation, and reserve the undisturbed soil between the motor vehicle tunnel 1 and non-motor vehicle tunnel 2 sub-arches Excavate the fertilizer groove 5, slope and construct the soil nail 4 on the side of the undisturbed soil;

[0037] Step 5: laying cement cushion 3;

[0038] Step 6: Construction of motor vehicle tunnel 1 floor reinforcement and formwork, and completion of concrete pouri...

Embodiment 2

[0046] Step 1: Divide the multi-arch tunnel into arches according to motor vehicle tunnel 1 and non-motor vehicle tunnel 2;

[0047] Step 2: Construction of support piles and water-stop curtains;

[0048] Step 3: Excavation of the foundation pit, first excavated to 20cm below the floor elevation of the non-motor vehicle tunnel 2;

[0049] Step 4: Keep the undisturbed soil of the non-motor vehicle tunnel 1 sub-arch, continue to excavate the foundation pit of the motor vehicle tunnel 1 part to 20cm below the floor elevation, and reserve the undisturbed soil between the motor vehicle tunnel 1 and the non-motor vehicle tunnel 1 sub-arch Excavate the fertilizer groove 5, slope and construct the soil nail 4 on the side of the undisturbed soil;

[0050] Step 5: laying cement cushion 3;

[0051] Step 6: Construction of motor vehicle tunnel 1 floor reinforcement and formwork, and completion of concrete pouring;

[0052] Step 7: set up the support and construct the roof of the motor ...

Embodiment 3

[0056] In this embodiment, the side slope ratio of the undisturbed soil in step 4 is 1:0.5. Grading while excavating the foundation pit of the first part of the motor vehicle tunnel. Soil nail 4 is constructed according to the specification.

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Abstract

The invention discloses an arch-dividing construction method for a multi-arch rectangular tunnel, which comprises the steps of dividing the multi-arch tunnel according to motor vehicle tunnels and non-motor vehicle tunnels. It has the advantages of less earth excavation, less earth backfill, easy control of backfill compaction, smaller one-time pouring concrete volume, less cold joints, and avoiding tunnel water leakage.

Description

technical field [0001] The invention relates to the field of tunnel construction, in particular to an arch-divided construction method for a multi-arch rectangular tunnel. Background technique [0002] With the continuous renewal of the urban expressway network, underground buildings such as multi-arch tunnels under the city, subway multi-arch U-shaped grooves, and urban comprehensive pipe gallery construction are booming. The establishment of underground tunnels is becoming the main theme of urban road construction. [0003] In order to save land resources and reduce the impact on the environment, multi-arch tunnels under the city began to be used, and the spans are getting larger and larger. Since there are many construction procedures for multi-arch tunnels, and most of them are constructed in urban areas, the requirements for the construction period are getting tighter and tighter. In the traditional multi-arch construction, after the construction of the overall bottom ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D29/045
CPCE02D29/045
Inventor 陈永王强林峰李冲陈静
Owner CHINA RAILWAY CONSTR GRP INFRASTRUCTURE CONSTR CO LTD
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