Construction treatment method of composite pile wall connected by row

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 treatment method suitable for cast-in-place reinforced concrete row composite pile walls on soft soil foundations. This scheme is suitable for the construction of multiple types of composite pile walls with deep soft soil and backfill soil, and can be widely used in seawall composite piles. Pile walls, 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 discharge a large am...

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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. During the silt transportation, the surrounding environment was polluted again. At the same time, a large amount of concrete was needed when pouring the pile body, which not only took time and labor, but also increased the project cost.

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