Tunnel pillar underground excavationreverse construction underground structure and construction method

A technology of underground structure and construction method, which is applied in underground chambers, earthwork drilling, wellbore lining and other directions, can solve the problems of high cost, slow construction speed, and difficult construction, and achieves control of differential settlement, accelerated construction speed, and improved construction. Difficulty reduction effect

Pending Publication Date: 2019-06-18
成都市建筑设计研究院有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] To sum up, the current "hole column" construction method adopts the reverse construction method, which involves transportation, processing, positioning measurement, hoisting and fixing of steel pipe columns, etc., which is difficult to construct, with poor working environment, high requirements for positioning accuracy and differential settlement control, and beam-column joints. Disadvantages of complex structure; the traditional straight building method has the disadvantages of difficult transportation and installation of horizontal steel supports, slow construction speed and high cost

Method used

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  • Tunnel pillar underground excavationreverse construction underground structure and construction method
  • Tunnel pillar underground excavationreverse construction underground structure and construction method
  • Tunnel pillar underground excavationreverse construction underground structure and construction method

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Embodiment 1

[0057] This embodiment provides an underground structure with underground excavation and upside-down construction of holes and pillars. Please refer to figure 1 and Figure 11 , this kind of tunnel column underground structure includes an upper pilot tunnel, a lower pilot tunnel, a main arch primary support 2, a permanent column 8, a top longitudinal beam 4, a bottom longitudinal beam 12 and a bottom plate 10;

[0058] Pilot tunnels are only set on the 10th floor of the main arch and bottom plate, and the number of transverse directions is determined according to the number of spans of the proposed underground space and the transverse column network. ) guide holes. In this embodiment, the proposed underground structure has three spans, and two pilot tunnels are respectively set at the center column, combined with the pilot tunnels on both sides, that is, there are four upper pilot tunnels and four lower pilot tunnels on a transverse section.

[0059] Both the upper pilot tun...

Embodiment 2

[0069] This embodiment provides a construction method for tunnel pillar underground excavation and reverse construction of underground structures, please refer to Figure 2-Figure 11 , this construction method carries out underground excavation within the radiation range below the house, and the rest is open excavation, which is used to construct the underground structure with underground excavation and reverse construction of the hole pillar in Embodiment 1, including the steps:

[0070] Step 1: See figure 2 The upper pilot tunnel and the lower pilot tunnel are excavated by the cross passage; the pilot tunnels on both sides are excavated first, and then the central pilot tunnel is excavated; the lower pilot tunnel is excavated first, and then the upper pilot tunnel is excavated. During construction, the initial Backfill grouting behind the branch in time, and carry out real-time monitoring and measurement, and seal the end of the pilot tunnel after it reaches the end; before...

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Abstract

The invention provides a tunnel pillar underground excavation reverse construction underground structure and construction method, and belongs to the technical field of underground structure construction.The tunnel pillar underground excavation reverse construction underground structurecomprises upper pilot tunnels, lower pilot tunnels, a main arch primary support, permanent columns, a top longitudinal beam, a bottom longitudinal beam, and a bottom plate; the main arch primary support is arranged on the side, away from the lower pilot tunnels, of the upper pilot tunnels; side piles are arrangedbetween the upper pilot tunnels on two sides and the corresponding lower pilot tunnels; the permanent columnsare arranged between the upper pilot tunnels in the middle and the corresponding lower pilot tunnels; middle platesare fixedly arranged between the permanent columns and between the permanent columns and the side piles; and the permanent columnsare square columns or steel pipe columns. According to the tunnel pillar underground excavation reverse construction underground structure, the construction problems that the construction is difficult, the working environment is poor, the positioning accuracy and the differential settlement control requirements are high, the structure of a beam-column joint is complicated in operations such as transportation processing, positioning measurement, lifting and fixing of the steel pipe columns in a narrow pilot tunnel can be completely avoided, the construction difficulty is greatly reduced, the construction speed is accelerated, and the riskis more controllable.

Description

technical field [0001] The invention relates to the technical field of underground structure construction, in particular to an underground structure and a construction method for tunnel pillar underground excavation and reverse construction. Background technique [0002] In the 1990s, the hole pile method was first successfully applied on the Fuba Line of the Beijing Subway and achieved good stratum control effects. It was then widely used in the first phase of the Beijing Subway Line 4 and Line 10, accumulating a large amount of Based on experience, it has become the mainstream construction method for underground excavation stations of Beijing subway. [0003] After more than ten years of development, there are great differences between the current hole pile method and the early hole pile method in terms of design ideas and construction methods. Construction is carried out with the "central column" method. Three small pilot holes are excavated on the upper floor, and side ...

Claims

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Application Information

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IPC IPC(8): E21D11/00E21D11/10E21D9/00
Inventor 陶磊刘建伟卢致强时亚昕张培胜白玉成申小兵钟扬吴起曹平李冀伟张健陈远洪王培海杜东平田青周波洋
Owner 成都市建筑设计研究院有限公司
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