Recoverable assembling framework and sawtooth anchor rod structure and construction method

Abstract

The invention discloses a recoverable assembling framework and sawtooth anchor rod structure and a construction method, and belongs to the technical field of geotechnical anchoring. The recoverable assembling framework and sawtooth anchor rod structure comprises a framework, anchor rods and anchor devices. The framework is formed by square tubes, sleeves and crosses through connection, wherein the square tubes extend into the sleeves and are connected with the sleeves through bolts so as to form cross beams and stand columns; the cross beams and the stand columns are inserted into the crosses; and the peripheries of the crosses are fixed by bolts. Each anchor rod consists of a steel tube, an expansion link, steel discs and a rotation shaft; a sliding chute, a first positioning hole and a second positioning hole are formed on the steel tube; the expansion link penetrates into the steel tube; the rotation shaft penetrates through the sliding chute to connect the expansion link with the steel tube; the rotation shaft is inserted into the first positioning hole; two ends of the rotation shaft are sleeved by the steel discs and fixed by nuts; and the adjacent steel discs are connected by bolts. The anchor rods penetrate through center holes of the crosses to reach into a slope, push-and-pull instruments sleeve the ends of the anchor rods to push the expansion links; the steel discs extend into a soil mass in a zigzag manner; pins are inserted into the second positioning holes to connect the steel tubes with the expansion links; and the anchor rods are anchored on the framework through the anchor devices and backing plates. The recoverable assembling framework and sawtooth anchor rod structure is recoverable in structure and high in construction speed, and has the effect of reducing the cost.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering anchoring, in particular to recyclable assembled frame serrated anchor rods, and is especially suitable for soil slope and foundation pit engineering in the construction process of roads and railways. Background technique [0002] With the rapid development of the national economy, infrastructure construction such as railways and highways has extended to mountainous areas. Complex terrain and geological conditions can be seen everywhere in highway and railway construction, and slope engineering is an important factor restricting the construction period and normal operation of highways and railways in these areas. Speeding up the slope construction along the line can shorten the construction period and reduce the investment cost of roads and railways; urban construction is developing rapidly, land is in short supply, multi-storey basements of high-rise buildings, underground railwa...

AI Technical Summary

Problems solved by technology

[0003] The frame of the existing frame bolt support is mainly cast-in-place reinforced concrete. It is difficult to transport formwork, steel bars and concrete to the slope, which consumes a lot of manpower and material resources, and the slow concrete solidification speed affects the construction progress; most of the bolts are injected with grout The method is anchored in stable soil, the construction period is long, the process is complicated, the solidification speed of the slurry is slow, and the anchor bolt construction cost is high; in temporary projects, it is difficult to dismantle the cast-in-place reinforced concrete frame, which cannot be recycled and reused, and the anchor bolt grouting causes The surrounding underground environment is seriously polluted, and the bolts cannot be recycled and buried underground, resulting in waste of resources, environmental pollution, and affecting the development and utilization of surrounding land resources

To sum up, the existing frame bolt support structure cannot shorten the construction period of road and railway slope projects; it cannot reduce the pollution of the foundation pit support structure to the surrounding underground environment, waste of resources, etc.

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