Composite material pile-anchor supporting device

Abstract

The invention belongs to the technical field of civil construction foundation pit construction, and relates to a composite material pile-anchor supporting device. The inner ends of fastening nuts areconnected with stress dispersion discs in a biting manner. Lattice type steel cushions are connected with the stress dispersion discs and double-web type composite material waist beams. Centering supports are connected with anchor rod holes and anchor rod bodies so that the anchor rod bodies can be located at centers of the anchor rod holes. Grout is injected in the anchor rod holes. Soil betweenpiles is around the anchor rod holes. A box-shaped section of each double-web type composite material waist beam is composed of a composite material waist beam upper flange, a composite material waistbeam lower flange and two composite material waist beam webs. Main bars and spiral stirrups are bound and connected through binding wires. Crown beams are installed at pile ends of grouting piles. The steel cushions are connected with bolts and the composite material waist beam webs. Manual assembling operation is conveniently conducted, construction is safe, convenient and rapid, operation and maintenance expenses are reduced, the service life is prolonged, the electromagnetic interference resistance is high, the composite material pile-anchor supporting device can be used in a cyclic manner, the production cost is low, and the application and popularization potential is large.

Description

Technical field: [0001] The invention belongs to the technical field of foundation pit construction in civil engineering, and relates to a novel composite material pile-anchor support device, which uses new-type, lightweight, high-strength, energy-saving, and environmentally friendly non-metallic materials to make cast-in-place piles, anchor rods, and waist (crowns). ) beam, forming a new set of pile-anchor support system. Background technique: [0002] At present, the foundation pit support methods mainly include row pile support, pile anchor, pile support, underground diaphragm wall, steel sheet pile, cement-soil retaining wall and soil nail wall, etc. These support methods have the disadvantages of high steel consumption, poor corrosion resistance, Disadvantages such as polluting the environment and requiring large construction machinery. In order to simplify the construction process, ensure the safety of construction and foundation pit use, and realize resource reuse an...

AI Technical Summary

Problems solved by technology

The traditional pile-anchor support structure uses reinforced anchor rods (cables) and shaped steel waist beams to replace the inner support of the foundation pit support to provide anchor tension for the support row piles to reduce the displacement and internal force of the support row piles, and to reduce the foundation pit support. The deformation is controlled within the allowable range. The support system is generally made of steel, concrete or steel, and these materials are easy to corrode, cannot be reused, have poor durability, waste resources and cause environmental pollution. It can be seen that seeking A new and advanced pile-anchor support device is imperative. The glass fiber composite material pile-anchor support structure is used in foundation pit support, which can not only save steel, protect the environment, but also fundamentally solve the problem of component corrosion , reduce the operation and maintenance costs of the structure, and prolong the service life of the structure, especially during the construction of urban subway tunnels, glass fiber bars are used instead of steel bars at the position where the shield machine of the enclosure pile enters the hole, and the enclosure can be directly cut when the shield machine enters the hole pile excavation, thereby avoiding the work of cutting steel bars and chiseling holes in advance, which not only simplifies the construction process, speeds up the construction progress, reduces construction risks, reduces costs, but also reduces the disturbance to the soil behind the retaining piles; and through the improvement technology, to achieve a detachable construction mode for the new pile anchor support, and to realize the recycling of waist beams and reduce engineering costs

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