Large-diameter vertical shaft excavation support construction method
A construction method and large-diameter technology, applied in shaft equipment, well-sinking, earth-moving drilling and mining, etc., can solve the problems of inconsistent shaft size and design size, low construction efficiency, collapse, etc., to improve dimensional accuracy and strength, improve construction Efficiency, the effect of avoiding collapse
Pending Publication Date: 2021-07-23
中国水利水电第六工程局有限公司
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Problems solved by technology
[0004] The invention provides a large-diameter vertical shaft excavation and support construction method, which aims to solve the problems that the existing shaft construction does not carry out targeted construction on each layer and easily causes collapse, the shaft size does not match the design size, and the construction efficiency is low.
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[0043] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0044] The embodiment of the present invention provides a large-diameter shaft excavation support construction method, combined with the attached figure 1 to attach Figure 22 shown, including the following steps.
[0045] S1, construction on the top floor, first excavate a trench along the direction of the exit of the hall, after the excavation of the trench is completed, lay ramps at both ends of the trench, and then excavate the remaining parts divided into 6 areas in order dig.
[0046] In this embodiment, the construction height of the top floor is 5 meters, which is the first floor.
[00...
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The invention is suitable for the technical field of vertical shaft construction, and provides a large-diameter vertical shaft excavation support construction method. The large-diameter vertical shaft excavation support construction method comprises the following steps that S1, top layer construction is carried out, specifically, a groove is excavated firstly, and then other parts divided into six areas are excavated according to a sequence; S2, pilot shaft construction is carried out, specifically, a 4-meter pilot shaft is excavated while supporting construction is carried out, and after the 4-meter pilot shaft is communicated, the 4-meter pilot shaft is excavated into a 9-meter pilot shaft; S3, a plurality of middle layers are constructed, specifically, grooving is conducted before excavation of each layer, and then excavation is conducted in sequence in the circumferential direction; S4, bottom layer construction is carried out, specifically, rock ballast collapsed when the last middle layer is communicated with the bottom layer annular guide hole is used for padding the rock ballast to the top of a rock pillar in the bottom layer annular guide hole, and then rock pillar areas divided into three areas are subjected to layered excavation treatment according to the sequence; and S5, construction of the annular guide hole is conducted, specifically, the annular guide hole is excavated in a one-time full-section mode. The size precision and strength of the structure of each layer can be improved, and the construction efficiency of each layer can also be improved.
Description
technical field [0001] The invention relates to the technical field of shaft construction, in particular to a large-diameter shaft excavation and support construction method. Background technique [0002] The shaft is a kind of well-shaped pipeline with an upright wall, which is mainly used to connect the bottom of the pool and the traffic branch hole as a slag discharge channel. [0003] The existing vertical shaft construction is directly excavated by direct blasting from top to bottom, and there is no targeted construction for each layer. This construction method of direct blasting excavation directly from top to bottom is likely to cause collapse. The design size does not match and the construction efficiency is low. Contents of the invention [0004] The invention provides a large-diameter vertical shaft excavation and support construction method, which aims to solve the problems that the existing shaft construction does not carry out targeted construction on each la...
Claims
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Login to View More IPC IPC(8): E21D1/00E21D5/04E21D21/00F42D3/04F42D1/00
CPCE21D1/00E21D5/04E21D21/00F42D3/04F42D1/00
Inventor 何金星叶明杨伟刚戚敬师王贵燕
Owner 中国水利水电第六工程局有限公司