A retractable manual digging pile support structure and its construction method

Abstract

The invention provides an extension type manual hole digging pile support structure and a construction method thereof. The extension type manual hole digging pile support structure comprises a steel plate, a bolt, a first connection part and a second connection part, wherein the first connection part and the second connection part are formed on the two opposite sides of the steel plate; the first connection part is provided with a bolt hole, and the second connection part is provided with a sliding groove; the first connection part and the second connection part are overlapped, so that the steel plate is rolled into a round pipe, the bolt hole and the sliding groove correspond in position, the bolt is inserted into the bolt hole and the sliding groove, and accordingly the first connection part and the second connection part are fixedly connected. By means of the extension type manual hole digging pile support structure and the construction method thereof, the operation of continuous excavation and support of artificial piles is achieved, hoisting of a protective barrel is not affected by the small pore diameter of an upper support body after the protective barrel extends, and the protective barrel can be put into a substratum directly; the excavation volume of earthwork is reduced since a support layer is thin.

Description

technical field [0001] The invention relates to the field of building construction, and specifically designs a retractable manual hole-digging pile support structure and a construction method thereof. Background technique [0002] In order to ensure the construction safety in the process of manually digging piles and prevent the hole wall soil from collapsing and causing personal injury accidents, commonly used pile hole support methods include steel formwork method, fixed steel casing, concrete retaining ring, etc. The steel formwork method is to support the steel formwork in the pile hole, bind and insert the steel mesh and then pour the concrete retaining wall. The excavation of the support and the amount of concrete pouring are relatively large, and the concrete can be excavated after the initial setting of the concrete, and continuous operation is not possible. If the time interval is long, it will easily cause water accumulation at the bottom of the hole, and the soft ...

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Problems solved by technology

The steel formwork method is to support the steel formwork in the pile hole, bind and insert the steel mesh and then pour the concrete retaining wall. The excavation of the support and the amount of concrete pouring are relatively large, and the concrete can be excavated after the initial setting of the concrete, and continuous operation is not possible. If the time interval is long, it will easily cause water accumulation at the bottom of the hole, and the soft strength of the soil will decrease, which will affect the safety of the lower support. It will easily cause deformation of the surrounding foundation when used in wet and soft soil layers. Due to the low efficiency, it is easy to generate piles during the excavation process. Holes and foundations are unsafe; fixed steel casings are only suitable for pile protection in shallow layers, and there is often a gap between the casing and the soil layer that needs to be fixed on the ground to prevent subsidence. If the soil layer deforms and collapses, the steel When the friction resistance of the casing is relatively strong, it is difficult to sink. The main problem is that it only supports the orifice section, and it is difficult to protect the deep part, especially for the reinforcement construction under the foundation; the concrete retainer is equivalent to the above-mentioned fixed steel casing technology, During the excavation process, it sinks by its own weight. If the soil layer is soft and deformed and the concrete retainer is locked, it will be difficult to sink and continue to work. The process is cumbersome, the soil around the pile is greatly disturbed, and the soil is easy to seep and slip along the gap. It is difficult to use in the excavation of deep and slightly weak soil foundation reinforcement pile holes, and it is also difficult to construct in the reinforcement works under the foundation.

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