Supporting method for construction of swirl well

Abstract

The invention discloses a supporting method for the construction of a swirl well. By using the supporting method, thin and long rod piece soil nails which are more densely arrayed are placed into an in-situ soil body in a foundation pit excavation process and a reinforced concrete pavement layer is sprayed on a slope surface. A composite soil body is formed by the common work of the soil nails, the soil body and the sprayed concrete pavement layer. A construction of the swirl well supported by a soil nail well comprises the following steps of: excavating one section of the base groove of the swirl well according to a small sloping coefficient; drilling holes by utilizing a drilling machine and putting an anchor rod; grouting and blocking; suspending a steel bar net sheet and spraying fine stone concrete to form a foundation side wall; gradually excavating and gradually carrying out combined bolting and shotcrete on the soil nails until the designed elevation of the foundation pit of the swirl well is achieved; and then, carrying out the section construction process of the cylinder wall of the reinforced concrete and an inner structure from bottom to top. By using the method, the supporting problem of a super-deep foundation pit under a hard soil layer environment is solved; and compared with a drop shaft sinking method, an underground diaphragm wall and a reverse process construction method, the method disclosed by the invention has the characteristics of simple construction process, low construction cost and fast construction speed.

Description

technical field [0001] The invention relates to a construction support method, in particular to a support method for swirl well construction. Background technique [0002] Swirling wells are widely used in iron sheet recovery and circulating water systems in the metallurgical industry. They are reinforced concrete cylindrical structures, generally deep, and difficult to construct. With the rapid development of the metallurgical industry, the application of swirling wells is increasing, and the scale is getting larger and larger, and the requirements for construction quality, safety and construction period are getting higher and higher. Swirl wells can usually be constructed by caisson method, underground diaphragm wall or reverse method according to different geological conditions. Caisson method: This scheme is often adopted in general areas. The self-weight of the swirling well is used to sink, and the construction is carried out in sections. The subsidence is carried out...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems existing in the prior art, the present invention provides a support method for swirl well construction, which overcomes the difficulty in construction of swirl wells in hard soil layers in the prior art

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