Fully-fabricated underground pipe gallery and underground space co-constructed PEC composite structure and construction method

Abstract

The invention discloses a fully-fabricated underground pipe gallery and underground space co-constructed PEC composite structure and a construction method, and the PEC composite structure comprises a bottom layer pipe gallery, a soil facing side wall, a middle plate, a top plate and a PEC beam; the bottom layer pipe gallery is formed by splicing a plurality of reinforced concrete pipe gallery precast blocks, the soil facing face side wall is formed by splicing a plurality of combined side wall plates, each combined side wall plate comprises a reinforced concrete plate and an H-shaped steel column, and the bottom of each H-shaped steel column is connected with a channel steel connecting piece embedded in the top face of the corresponding reinforced concrete pipe gallery precast block. A PEC beam is rigidly connected between the top ends of every two H-shaped steel columns at intervals on the same side; the middle plate is formed by splicing a plurality of combined middle plates, the top plate is formed by splicing a plurality of combined top plates, each combined top plate comprises a reinforced concrete plate and a steel beam, and the steel beams are in equal-strength connection with short beam connectors on the H-shaped steel columns. Compared with a common full-prefabricated assembly type concrete structural member, the prefabricated assembly type concrete structural member has remarkable progress in the aspects of design, construction, operation and maintenance, and has remarkable social benefits, economic and environmental benefits and popularization value.

Description

technical field [0001] The invention belongs to the technical field of municipal engineering and relates to underground structures, in particular to a fully assembled underground pipe gallery and underground space co-constructed PEC composite structure. Background technique [0002] At present, the development of urban underground space mostly adopts the development mode of centralized construction of underground space in the central area and independent construction of peripheral underground space. Within the red line, there are multiple municipal and transportation facilities collinear, vertically stacked structures, and horizontal interconnection of underground spaces. The co-construction structure can realize the integrated construction of collinear facilities, share the foundation, intensive space, improve construction efficiency, and can also reserve conditions for unmanned logistics sanitation. [0003] At present, the prefabricated underground structure is mainly com...

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Problems solved by technology

[0003] At present, the prefabricated underground structure is mainly composed of fully reinforced concrete structure, which adopts the fully prefabricated assembly connection method or the composite structure method. The prefabrication rate of the composite structure is low, and the post-cast concrete is more. The advantages are not obvious. Fully prefabricated reinforced concrete components are generally large in size and weight, and the transportation costs are high or even difficult to transport. The on-site hoisting process is complicated, and the equipment requirements are high. The force changes of different sections of the same component vary greatly, and the transverse joint cuts off the main force-bearing components. The connection of the main structure needs to consider the influence of the connection structure and the connection part on the overall stiffness. The cost of obtaining parameters through experiments and simulation calculations is high, the design calculation is complicated, and the accuracy is low. The waterproof performance is also affected by the mechanical characteristics of the main structure.

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