Tunnel-form prestressed pipe curtain structure and construction method thereof

Abstract

The invention discloses a tunnel-form prestressed pipe curtain structure and a construction method thereof. The tunnel-form prestressed pipe curtain structure is composed of a plurality of prefabricated concrete beams, a prefabricated steel unit, a concrete cast-in-place section, a plurality of transverse prestressed bars and a plurality of longitudinal prestressed bars; the multiple prefabricatedconcrete beams are connected through buckles and seam grouting, and form a whole by tensioning the transverse prestressed bars and the longitudinal prestressed bars; the prefabricated steel unit serves as a construction platform of the transverse prestressed bars to apply annular or transverse prestress to the multiple prefabricated concrete beams; and the concrete cast-in-place section is located at the bottom of the pipe curtain structure. The prefabricated concrete beams and a corner steel unit which are adopted in the pipe curtain structure can be subjected to standardized production in afactory, it can be guaranteed that the structure has good stress performance, and the tunnel-form prestressed pipe curtain structure and the construction method thereof have the advantages that the structure is simple, the construction speed is high, overall stiffness is large, the construction cost is saved, and the construction period is shortened, and have wide application prospects in underground structure construction, especially municipal engineering construction.

Description

technical field [0001] The invention belongs to the technical field of civil engineering, and more specifically relates to a tunnel form prestressed pipe curtain structure and construction technology. Background technique [0002] Pipe curtain construction technology is a non-excavation technology for constructing underground structures, and it is mostly used in underground buildings that cross roads, railways, structures, airports, etc. Pipe curtain construction technology, by excavating the departure well and working well at both ends of the underground structure, and adopting the method of jacking prefabricated components, an annular curtain structure is formed underground to bear the surrounding load and prevent water, and then excavate and build underground structure. As a kind of trenchless technology, compared with construction technologies such as pipe jacking and shield tunneling, pipe curtain construction technology has smaller requirements for construction space ...

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Setting up horizontal jet grouting piles is difficult to construct and will bring many new pro...

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