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Suspension type well wall sinking construction method used for urban shaft construction

A construction method and a suspension-type technology are applied in the field of suspension-type shaft wall subsidence construction, which can solve the problems of shaft excavation direction deviation, shaft wall deviation, difficulty in lowering shaft wall, etc., so as to avoid deviation and improve the use of longevity, and the effect of avoiding excessive lateral static pressure of the formation

Inactive Publication Date: 2018-05-08
BEIJING CHINA COAL MINE ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the process of lowering the shaft wall, it is often encountered that the shaft deflection makes it difficult to lower the shaft wall, and the existing vertical shaft construction usually uses the self-weight of the shaft wall to sink the shaft wall, and then excavates the soil in the shaft. This construction method , when there are hard solids such as gravel in the formation, the sinking speed of the well wall will slow down, or even stop falling, and when a part of the well wall touches hard solids and other parts are still in contact with soil, the well wall is easy to sink. Deflection occurs, which in turn causes a deviation in the direction of shaft excavation

Method used

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  • Suspension type well wall sinking construction method used for urban shaft construction
  • Suspension type well wall sinking construction method used for urban shaft construction

Examples

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Embodiment 1

[0025] In order to build an underground three-dimensional garage while reducing the amount of construction, the vertical shaft is usually selected as the construction space of the three-dimensional parking garage. In this embodiment, the suspended shaft wall sinking construction method for urban vertical shaft construction includes the following steps:

[0026] 1) Level the ground.

[0027] Before the excavation of the shaft shaft, it is necessary to level the surface of the excavation section of the shaft shaft to remove the sundries on the ground, and to level the ground at the excavation position of the shaft shaft to facilitate subsequent construction.

[0028] 2) Excavate the initial section of the shaft shaft.

[0029] In order to facilitate the lowering of the shaft wall 8, before the shaft shaft is excavated by large-scale excavating equipment, the initial section of the shaft shaft is excavated manually or by other small equipment.

[0030] 3) Build a concrete platfo...

Embodiment 2

[0044] The difference between the suspended shaft wall sinking construction method for urban shaft construction in this embodiment and the suspended shaft wall sinking construction method for urban shaft construction in Example 1 is: in step 6), Shaft well wall 8 is installed and comprises the steps:

[0045] 6.1) Install the shaft wall formwork on the shaft shaft wall blade foot 9;

[0046] 6.2) Pour concrete into the well wall formwork, and remove the well wall formwork after the concrete solidifies.

[0047] The shaft wall 8 can be poured with different concrete slurries according to the difference in the lateral static pressure of the formation that the shaft wall 8 is subjected to by concrete pouring.

[0048] In Embodiment 1 and Embodiment 2, the guiding system formed by using the vertical shaft wall blade foot 9, the vertical shaft shaft wall 8 and the lifting system for lowering the vertical shaft shaft wall can ensure that the shaft excavation direction is vertically...

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Abstract

The invention discloses a suspension type well wall sinking construction method used for urban shaft construction. The method comprises following steps: firstly, the ground is flatted; secondly, shaftcylinder initial-segment excavation is carried out; thirdly, a concrete platform is laid in the circumferential direction of a shaft opening; fourthly, a shaft wall blade foot is lowered into a shaftcylinder; fifthly, three or more lifting system for shaft wall lowering are arranged on the concrete platform at equal intervals in the circumferential direction of the shaft opening, and the liftingsystem used for the lowering of the shaft wall is in transmission connection with shaft wall blade feet; sixthly, shaft walls are mounted on the shaft wall blade feet in the circumferential directionof the shaft cylinder; seventhly, the shaft cylinder is continuously excavated downwards, after one well segment is excavated, the lifting system for lowering of the shaft w ell is used for loweringthe shaft wall. The method can be used for a stereo garage in a manner of rectifying deviation in the shaft excavation direction, the difficult well wall lowering caused by well cylinder deviation canbe avoided, and the stratum side static pressure imbalance caused in the shaft wall lowering process can be avoided.

Description

technical field [0001] The invention relates to the technical field of shaft excavation, in particular to a suspended shaft wall sinking construction method used for urban shaft construction. Background technique [0002] With the gradual expansion of the city and the increase of the resident population, many projects will use shafts, especially sunken shafts (referred to as caissons), which have a diameter of 4-20 meters and a depth of less than 100 meters. They are mostly used in garages and tunnels. Construction and underground vertical passages, etc. A caisson is a shaft with no bottom and no cover, and generally consists of blade feet, well walls, partition walls, well holes, grooves, jet tube groups and detection tubes, back-sealing concrete, and top covers. However, in the process of lowering the shaft wall, it is often encountered that the shaft deflection makes it difficult to lower the shaft wall, and the existing vertical shaft construction usually uses the self-...

Claims

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Application Information

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IPC IPC(8): E02D23/08E21D1/03
CPCE02D23/08E21D1/03
Inventor 冯旭海刘志强田乐郑江波王强
Owner BEIJING CHINA COAL MINE ENG CO LTD
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