Rapid construction method for U-shaped groove crossing existing culvert

A construction method and technology of U-shaped grooves, which are applied in excavation, infrastructure engineering, roads, etc., can solve the problems of prolonging the construction period and prolonging the construction light period.

Active Publication Date: 2019-12-27
CHINA RAILWAY NO 3 GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Every subway line has an entry and exit line that transitions from the underground to the ground, and U-shaped grooves are usually used for the transition. Traditional U-shaped grooves generally use the formwork method to carry out the main structure construction after the slope excavation of the foundation pit is completed. However, due to The surrounding environment of the construction in the city is complex, and the entry and exit lines often conflict with existing buildings and pipeline trenches, etc., and need to be rerouted in advance, especially in water-rich areas with well-developed springs. If U-shaped groove construction and existing water culverts In the event of a conflict, the culvert needs to be demolished in advance. However, the culvert often has the functions of rainwater confluence and flood drainage in mountainous areas, so it cannot be demolished on schedule. It must wait until the end of the flood season before demolition, relocation and reconstruction can be carried out, which greatly prolongs the construction At the same time, when the new water culvert is rebuilt, there may be conflicts with surrounding heat, electricity, weak wells and other equipment, and all of them need to be relocated, which further prolongs the construction photoperiod; in this case, how to protect the existing pipe trench The normal use and safety of the building, as well as ensuring the smooth construction of the U-shaped trough structure of the subway, and preventing the deformation and settlement of the existing pipelines, surrounding pipelines and buildings caused by grading and excavation, and loss of use functions are all important tasks for the project builders. problem

Method used

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  • Rapid construction method for U-shaped groove crossing existing culvert
  • Rapid construction method for U-shaped groove crossing existing culvert
  • Rapid construction method for U-shaped groove crossing existing culvert

Examples

Experimental program
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Effect test

Embodiment 1

[0026] This embodiment provides a rapid construction method for the U-shaped groove of an existing culvert, which includes the following steps:

[0027] S1, according to the depth and position of the U-shaped groove foundation pit, adopt the traditional sloping excavation technology, first use sloping excavation, the earthwork will be excavated by vertical slope and flowing water, and horizontal layered sloping excavation, after the excavation is completed The slope bolts are set, and after the construction of the bolts is completed, the slopes are hung with nets and sprayed with concrete, and excavated to the bottom of the U-shaped groove foundation pit at one time;

[0028] S2. After the U-shaped groove foundation pit is excavated to the specified elevation, support piles 5 shall be installed on both sides of the culvert. The distance between the support piles 5 and the side beams of the culvert shall not be less than 1 meter. The steel bars are reserved and anchored into th...

Embodiment 2

[0034] The entrance and exit line of Longdongzhuang Parking Lot of Jinan Rail Transit R3 Line is drawn from Mengjiazhuang Xiaolicheng, and is laid southward along Longding Avenue. 1736.151m, in which the top plate of the box culvert of the Daxin East tributary ditch conflicts with the bottom plate of the U-shaped trough in the open excavation section. The river branch ditches are responsible for the confluence of rainwater and flood diversion in the southern mountainous area, and the construction cannot be cut off. The drainage in the box culvert is continuous. The specific steps of adopting a rapid construction method for the U-shaped groove of an existing culvert spanning above are as follows.

[0035] S1, according to the depth and position of the U-shaped groove foundation pit, excavation by sloping is adopted first, the earthwork is excavated longitudinally by pulling the slope and running water, and the excavation is excavated by sloping horizontally in layers. The first...

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Abstract

The invention provides a rapid construction method for a U-shaped groove crossing an existing culvert, and belongs to the technical field of culvert U-shaped groove construction. The rapid construction method comprises the following steps that a U-shaped groove foundation pit is dug; supporting piles are applied; a U-shaped groove section culvert structure top plate is broken, the pile tops of theconstructed supporting piles are removed, and pile top anchoring crown beam steel bars are reserved; full-hall supports are erected in the culvert; a pile top crown beam, a structural distribution beam and co-building structure steel bars of a U-shaped groove bottom plate and the culvert top plate are applied; and after the co-building structure of the U-shaped groove bottom plate and the culverttop plate is cast and formed at a time by adopting C35 concrete, wall bodies on both sides of the U-shaped groove are constructed through pulling a vertical formwork in opposite, and a U-shaped groove wall rear soil body is backfilled after the strength is achieved. According to the rapid construction method, on the premise of ensuring the normal using function of the existing culvert and reducing the influence of peripheral pipelines, the construction efficiency of the U-shaped groove is improved to the greatest extent, and the construction process is simplified.

Description

technical field [0001] The invention belongs to the technical field of U-shaped trough construction in culverts, and specifically discloses a rapid construction method for U-shaped troughs spanning existing culverts. Background technique [0002] Every subway line has an entry and exit line that transitions from the underground to the ground, and U-shaped grooves are usually used for the transition. Traditional U-shaped grooves generally use the formwork method to carry out the main structure construction after the slope excavation of the foundation pit is completed. However, due to The surrounding environment of the construction in the city is complex, and the entry and exit lines often conflict with existing buildings and pipeline trenches, etc., and need to be rerouted in advance, especially in water-rich areas with well-developed springs. If U-shaped groove construction and existing water culverts In the event of a conflict, the culvert needs to be demolished in advance....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D17/08E02D27/14E02D27/32E01B2/00
CPCE01B2/006E02D17/08E02D27/14E02D27/32E02D2300/002E02D2600/20
Inventor 傅重阳刘国杰武永珍段久波胡国伟郑保才宁轲郑航李伟孟令涛
Owner CHINA RAILWAY NO 3 GRP CO LTD
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