Concrete pedestal pile construction equipment and its construction method

Abstract

The invention discloses a concrete club-footed pile construction device and a construction method, which belongs to the technical field of concrete caisson pile construction, wherein the construction device comprises a chassis girder and a main shelf whose front end is fixedly connected with a vertical guide rail. The main shelf is provided with a pulley group, and a steel rope is connected with a protecting barrel after bypassing a secondary pulley, which is connected with a pillar hammer after bypassing a main pulley of the pulley group, the pillar hammer is positioned in the protecting barrel whose lower end is provided with an earth-fetching device and the top end is fixedly connected with a vibration impact hammer. The construction method is that earth is firstly fetched to form a pile hole, and the protecting barrel is sunken, and a pile base which is finally formed belongs to an earth-squeezing or half earth-squeezing pile. The invention can easily sink the protecting barrel to the pre-determined depth or raise the protecting barrel from a formulated position, and the work efficiency can be improved, and the shortcomings that the adjacent pile body floats upwards or is broken or the neck of the pile body shrinks which is caused by earth-squeezing effect when the protecting barrel is sunken are avoided, and the construction quality can be guaranteed.

Description

technical field [0001] The invention relates to a construction device and a construction method of a concrete bottom expansion pile. Background technique [0002] Concrete cast-in-situ piles are often used in the foundation construction of buildings. A construction method of this pile is to use a casing and a column hammer for construction, such as the method disclosed in the invention patent specification with the notification number CN1093582C, that is, by using a column hammer to tamp Hitting the casing or tamping the soil inside the casing makes the casing sink to a predetermined depth, thereby forming a pile hole, and then forming a tamping head at the pile end through a column hammer, pouring concrete for the pile body while lifting the casing, thereby Form the entire concrete pouring pile. When the pile diameter is large or the foundation soil layer is relatively hard (such as hard plastic clay or fully weathered bedrock), the side wall friction force on the casing i...

AI Technical Summary

Problems solved by technology

When the pile diameter is large or the foundation soil layer is relatively hard (such as hard plastic clay or fully weathered bedrock), the side wall friction force on the casing is relatively large, so it is difficult to sink the casing to a predetermined depth or from the specified depth. The location is proposed, and the construction quality and work efficiency are affected

In addition, this method often causes adjacent piles to float up or break piles, necking and other pile body defects due to the soil squeezing effect when the casing is sunk.

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