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Excavation and construction method of underground cavity ball coronary dome

A construction method and underground cavern technology, which is applied in underground caverns, earthwork drilling, wellbore lining, etc., can solve the problems of lack of engineering precedents, and achieve the effects of convenient and accurate work, high construction efficiency, and increased construction space

Active Publication Date: 2013-08-21
THE 4TH ENG CO LTD OF CHINA RAILWAY 16TH BUREAU GRP CO LTD
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Problems solved by technology

The construction technology of this kind of vertical cavern is very different from the construction technology of conventional underground engineering, and there is no engineering precedent for reference in the existing patents

Method used

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  • Excavation and construction method of underground cavity ball coronary dome
  • Excavation and construction method of underground cavity ball coronary dome
  • Excavation and construction method of underground cavity ball coronary dome

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Embodiment Construction

[0022] Such as Figure 1-3 Shown, be 27.5m with transverse span, height is the underground cavern spherical crown dome of 8.3m as an example and introduces the excavation construction method of underground cavern spherical crown dome provided by the present invention, is provided with a width and is 3.9m, and height is A 4.3m channel is connected to it. The surrounding rock has well-developed joints and faults, and the faults are rich in groundwater. The integrity of the surrounding rock is poor, and the construction risk is high. In order to solve the difficult problem of excavation construction of the spherical crown dome under poor geological conditions, the excavation construction method provided by the present invention is adopted.

[0023] (1) Construction of channel 4, providing access for construction personnel, materials and machinery to enter and exit.

[0024] (2) The excavation construction of part 1 of the dome uses plain sprayed concrete as the initial support....

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Abstract

The invention relates to an excavation and construction method of an underground cavity ball coronary dome. The excavation and construction method includes the following steps: S1, a channel is constructed; S2, a dome part I is excavated, primary support is conducted on the dome part I, S3, a dome part II is excavated, primary support is conducted on the dome part II, S4, a dome part III is excavated, a steel wire rope which is connected with the central point of the bottom of the dome and the central point of the top of the dome is used as a center, the vertical layered construction height marked on the steel wire rope is used as a control height, and the dome part III is constructed in a layering and loop mode from top to bottom. Each layer is excavated in a segmentation mode, and the primary support is conducted on each segment. The excavation and construction method of the underground cavity ball coronary dome has the advantages that geology is ascertained through an advance pilot tunnel, therefore, reinforcing supporting measures can be made in advance, and the stability of surrounding rock is guaranteed. An annular excavation method in which a dome central line is used as a standard from top to bottom is adopted, the line type control of a fracture surface is benefited, the construction space is enlarged, mechanical operation is convenient, and construction efficiency is high.

Description

technical field [0001] The invention relates to the technical field of excavation construction of underground caverns, in particular to an excavation construction method of spherical crown domes of underground caverns. Background technique [0002] The spherical crown dome of the underground cavern is a three-dimensional shape, and the design section profile is always changing dynamically, which has high requirements for the control of the section line shape. The construction technology of this type of vertical cavern is very different from the construction technology of conventional underground engineering, and there is no engineering precedent for reference in the existing patents. With the massive construction of underground storage projects, as an important part of large vertical storage caverns, the construction of spherical crown domes will pose many challenges to project builders. Therefore, an excavation construction method suitable for spherical crown domes is need...

Claims

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Application Information

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IPC IPC(8): E21D9/00E21D11/00
Inventor 杨长春孙继永肖丽君杨彦岭李庚许闫肃黄明利郭朝董倩
Owner THE 4TH ENG CO LTD OF CHINA RAILWAY 16TH BUREAU GRP CO LTD
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