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Cut-through excavating construction method for large-cavern-diameter and small-cavern-diameter underground caverns

A technology for underground caverns and construction methods, applied in underground caverns, earthwork drilling, blasting, etc., can solve the problems of poor molding quality of cavern openings, difficulty in controlling blasting vibration and loose rock circles, and achieve blasting construction molding quality Good, construction safety guaranteed, cost reduction effect

Active Publication Date: 2017-01-04
SINOHYDRO BUREAU 14 CO LTD
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Problems solved by technology

[0005] The traditional excavation method of large and small diameter underground caverns is to open large diameter caverns first, and then excavate to small diameter caverns. In this way, it is difficult to control the blasting vibration and rock loosening circle, and the formed quality of the cavern opening is relatively low. Difference

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  • Cut-through excavating construction method for large-cavern-diameter and small-cavern-diameter underground caverns
  • Cut-through excavating construction method for large-cavern-diameter and small-cavern-diameter underground caverns
  • Cut-through excavating construction method for large-cavern-diameter and small-cavern-diameter underground caverns

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[0032] The present invention will be further described in detail below in conjunction with the examples.

[0033] Those skilled in the art will understand that the following examples are only for illustrating the present invention and should not be considered as limiting the scope of the present invention. If no specific technique or condition is indicated in the examples, it shall be carried out according to the technique or condition described in the documents and specifications in this field or according to the product specification. The materials or instruments used are not indicated by the manufacturer, and they are all conventional products that can be obtained through purchase.

[0034] like Figure 1~2 As shown, a construction method for excavating underground caverns with large and small diameters, the steps are as follows:

[0035] The small-diameter caverns are excavated ahead of time to the large-diameter caverns. When over-excavating to the large-diameter cavern...

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Abstract

The invention relates to a cut-through excavating construction method for large-cavern-diameter and small-cavern-diameter underground caverns, and belongs to the technical field of engineering construction. The method aims at improving cut-through excavating forming quality of small-cavern-diameter caverns, and includes the steps that blasting design is optimized, a non-coupling millisecond blasting mode is adopted, and the charge amount is controlled; the small-cavern-diameter cavern is excavated in advance to penetrate through the large-cavern-diameter cavern, a covering layer is reserved for the large-cavern-diameter cavern, and then smooth blasting holes are formed in a radiant mode; and blasting vibration and disturbance are controlled with the forms of intermediate slotting and presplitting blasting, and thus the cut-through excavating forming effect for the large-cavern-diameter and small-cavern-diameter caverns is achieved. The cut-through excavating construction method has the characteristics that the technical scheme is reasonable, blasting design is safe and practical, the cavern opening forming quality is good, back break and rock blasting loosening can be effectively controlled, and the quality of the construction process is guaranteed; and the method is suitable for cut-through excavating blasting control construction for the large-cavern-diameter and small-cavern-diameter underground caverns.

Description

technical field [0001] The invention belongs to the technical field of engineering construction, and in particular relates to a construction method for through-hole excavation of large and small underground caverns, which is suitable for blasting and excavation construction of underground engineering. Background technique [0002] With the development of human society, underground engineering will be more and more used in various fields of national economic infrastructure construction. In the construction of water conservancy and hydropower, highways, railways, oil depots and other projects, more and more underground caverns are used. [0003] Before the 1960s, underground engineering was excavated by manual air drilling and free blasting; in the early 1980s, smooth blasting was used in the construction of Xi'er River Power Station, Yuzixi Power Station, and Baishan Power Station; after 1985 , In the excavation of the diversion tunnel of the Lubuge Power Station, rock drilli...

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Application Information

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IPC IPC(8): E21D13/02F42D1/00
CPCE21D13/00F42D1/00
Inventor 和丽钢刘芳明朱育宏李辉华石坤蔡斌陈继杨李前昊陈绍友吴娟娥杨涛陈宇张子松
Owner SINOHYDRO BUREAU 14 CO LTD
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