Construction method for row composite piling wall and special hole forming machine

Abstract

The invention discloses a construction method for a soft foundation cast-in-place reinforced concrete row composite piling wall and a special hole forming machine. The special hole forming machine comprises a medium-high frequency vibration hammer, a special clamp device, multiple groups of outer steel pile casings, multiple groups of inner steel pile casings, a reinforced concrete sealing pile tip or multiple steel valve pile tips and a steel hinge chain joint. According to the project for the soft foundation cast-in-place reinforced concrete row composite piling wall provided by the invention, except the single-pile bearing capacity is improved, the integrated sideslip displacement prevention capacity and the waterproof action of a composite foundation are reinforced. According to the project, the construction cost can be reduced by more than 20%, the construction soil discharge quantity is reduced by 50%, the pollution of secondary dredging transportation is avoided, and construction at different weak soil layers and complicated fields can be adapted.

Description

technical field [0001] The invention relates to a construction method and a special hole forming device suitable for cast-in-place reinforced concrete row composite pile walls on soft soil foundations. This scheme is suitable for the construction of composite pile walls of various types of deep soft soil and backfill soil. It can be widely used in composite pile walls of seawalls, revetment structures of ports and wharves, retaining walls of water conservancy canals and supporting structures of deep foundation pits of buildings, etc. Background technique [0002] At present, in the pile foundation construction of various ports, docks, water conservancy, airports, railways and buildings with deep soft soil and backfill soil, most of them still use the traditional construction technology, that is, first drive a large-diameter single steel casing into the Or press into the soil, and then take the soil by punching, digging or auger drilling. This construction method needs to di...

AI Technical Summary

Problems solved by technology

[0002] At present, in the pile foundation construction of various ports, docks, water conservancy, airports, railways and buildings with deep soft soil and backfill soil, most of them still use the traditional construction technology, that is, first drive a large-diameter single steel casing into the Or press into the soil, and then take the soil by punching, digging or auger drilling. This construction method needs to discharge a large amount of soil during the hole forming process. The surrounding environment is polluted again during the transportation of silt

At the same time, a large amount of concrete needs to be used when pouring the pile body, which is not only time-consuming and labor-intensive, but also increases the project cost

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