A prestressed light pile and construction method for quickly anchoring emergency bridge cables

Abstract

The invention discloses a prestressed light pile for rapidly anchoring an emergency bridge inhaul cable and a construction method of the prestressed light pile. The light pile comprises a hollow pilebody and a pile cap which is arranged at the upper end of the pile body and is in interference fit with the pile body, and the pile body is composed of an outer pipe, a middle pipe and an inner pipe.The construction method of the light pile comprises the steps that drilling is conducted, the outer pipe provided with a clamp is inserted into the hole, a spiral drilling machine is moved away, an outer spiral pipe clamp is removed, then the middle pipe and the inner pipe are sequentially driven in, after the inner pipe is driven in, the composite middle pipe expands circumferentially, the outerpipe is forced to extrude rock around the pile, circumferential pre-tightening force is generated, the anti-pulling bearing capacity of the anchoring pile is improved, finally, the prefabricated steelpile cap in interference fit is driven into the inner pipe, and the emergency bridge inhaul cable is anchored on the pile cap. The light pile is made of a light aluminum alloy and a composite, and the transport cost is lowered; and through threads on the composite middle pipe and the outer pipe, the anti-pulling bearing capacity of the pile body and pile-soil is improved, the light pile is drivenin on site and used immediately, and the requirements of an emergency bridge are met.

Description

Technical field [0001] The invention belongs to the field of geotechnical engineering, and particularly relates to a prestressed light pile for quickly anchoring emergency bridge cables and a construction method. Background technique [0002] China has a vast territory and intricate terrain. Natural disasters such as earthquakes, mudslides, and landslides occur frequently. Emergency maneuver support capabilities for roads and bridges have become the most critical link in post-disaster rescue and disaster relief. At present, the lightweight, highly reinforced and modular emergency bridge technology can realize rapid transfer and erection, and the entire installation process has been shortened from the traditional 20 hours to 1 to 2 hours. Suspension bridges are mostly used as emergency bridges, and the suspension cables need to be tensioned by anchor piles during the erection process to achieve balanced erection. Traditional anchor piles mostly use driven steel pipe piles, but st...

AI Technical Summary

Problems solved by technology

Traditional anchor piles mostly use driven steel pipe piles, but steel pipe piles have the following limitations: First, steel pipe piles driven into rock formations cause damage to the rock formations around the piles, which affects the play of the pile foundation's uplift bearing capacity. In order to meet the bearing capacity It is often necessary to drive in group piles as anchor piles, which increases the amount of work and prolongs the construction progress; secondly, the steel pipe piles are heavy, and the pile group costs a lot, and the transportation cost for mountainous projects cannot be ignored

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