Composite material pile-anchor supporting method

Abstract

The invention belongs to the technical field of civil construction foundation pit construction, and relates to a composite material pile-anchor supporting method. A glass fiber composite material pile-anchor supporting structure is adopted in foundation pit supporting, steel is saved, environment protection is achieved, the problem of component corrosion is fundamentally solved, operation and maintenance expenses of the structure are reduced, and the service life of the structure is prolonged; particularly when urban subway tunnel construction is conducted, at the cave entering position of a shield tunneling machine of fender piles, reinforcing steel bars are replaced with glass fiber bars, the shield tunneling machine can directly cut the fender piles for tunneling when entering a cave, and therefore the work of cutting off the reinforcing steel bars and chiseling a cave door in advance is avoided, the construction process can be simplified, the construction process can be accelerated, construction risks can be reduced, cost can be reduced, and disturbance to soil mass behind the fender piles can be reduced; and by improving the process, the detachable construction mode is achieved for novel pile-anchor supporting, cyclic utilization of waist beams can be further achieved, and the engineering cost can be reduced.

Description

Technical field: [0001] The invention belongs to the technical field of civil construction foundation pit construction, and relates to a novel composite material pile-anchor support method, 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 and ...

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

Images