High-performance concrete cylindrical permanent formwork capable of being assembled and construction method thereof

Abstract

The invention belongs to the technical field of bridge lower structure construction formworks, and relates to an ultra-high performance concrete splicable cylindrical permanent formwork and a construction method thereof, the formwork is made of ultra-high performance concrete, construction load generated when concrete is poured in the pouring formwork can be borne without arranging steel bars in the formwork. All the connecting structures and the standard plates are prefabricated together to guarantee effectiveness and durability of the connecting structures, self-locking cambered surface mortise and tenon structures are used, the stress requirement of the formwork is met, meanwhile, using of bolts is reduced, the construction speed is increased, the construction method that the prefabricated standard plates are adopted for assembling formwork segments is adopted, and the characteristic that ultra-high-performance concrete needs to be subjected to steam curing is met. The manufacturing quality of the standard plate is guaranteed through factory prefabrication, the standard plate is convenient to store and transport, site construction in the construction process is effectively reduced, the construction efficiency and the construction quality are guaranteed, and the formwork is suitable for post-disaster rapid reconstruction and repair engineering of the bridge substructure and has great application value and good economic benefits.

Description

Technical field: [0001] The invention belongs to the technical field of bridge substructure construction formwork, and relates to an ultra-high-performance concrete assembleable cylindrical permanent formwork and a construction method thereof. Background technique: [0002] When pouring concrete elements, formwork is required to control the shape of the concrete elements. In traditional engineering, wood, steel, aluminum alloy and other materials are used to make formwork, and the formwork needs to be installed before pouring concrete, and the formwork needs to be removed after the concrete reaches its strength. Such a construction process has a long period and high cost. [0003] Permanent formwork is used in cast-in-place concrete engineering. After pouring concrete, there is no need to remove the formwork. The formwork and the cast-in-place structure are superimposed and combined to form a common force-bearing member. It has the advantages of simplified construction pro...

AI Technical Summary

Problems solved by technology

These existing permanent formworks have targeted solutions to the problems existing in traditional formworks, but they are all equipped with steel bars or wire mesh inside, and there is no targeted solution to the problem of structural durability

[0004] In addition, the permanent formwork applied to circular or semicircular structures is generally produced as a whole by centrifugal method. Due to the influence of the centrifugal process in the finished product, the denser aggregate and steel fibers will be concentrated on the outer layer of the permanent formwork. Uneven distribution of aggregate and steel fibers will cause uneven mechanical properties of permanent formwork members, increasing the uncertainty of the structural bearing capacity

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