Construction device for rammed bulb pile and construction method using device

Abstract

The invention provides a construction device for a rammed bulb pile and a construction method using the device. The construction device is as follows: the lower end of a hammer rod is fixedly connected with the upper end of a heavy hammer, the upper end of the hammer rod is fixedly connected with a lifting ring, a material channel is arranged at the center in the heavy hammer, two cavities are arranged in a hammer body of the heavy hammer, a hydraulic cylinder is arranged in each cavity, two symmetrical discharge valves are arranged at the lower part of the hammer body, the discharge valves are hinged with the lower part of the hammer body through hinges, and the free ends of hydraulic rods of the hydraulic cylinders are hinged with the discharge valves. The construction method comprises the following steps: impacting repeatedly by using free falling of the heavy hammer for forming a hole till the designed scale height, then lifting the heavy hammer and the hammer rod upwards by the height of not less than 30cm, opening the discharge valves of the heavy hammer, charging materials to the bottom of the hole through a pipe barrel and the material channel of the heavy hammer, performing the impacting and end enlargement, and then pouring for forming the pile. The materials are charged to the bottom of the hole through the hammer rod and the channel in the heavy hammer, unhooking is not required during tamping, the tamping can be continuously performed, the construction speed is fast, and the depth of the formed pile can achieve 50 meters.

Description

technical field [0001] The invention relates to a construction device for a rammed and expanded pile and a construction method using the device. Background technique [0002] The existing rammed and expanded piles used in engineering mainly include the following two methods of forming piles: [0003] 1. Reinforced concrete rammed and expanded carrier piles (representative patents include: ①Patent No. ZL98101041.5, titled "Construction Method for Concrete Pile", date of authorization announcement is May 10, 2000, authorization announcement number is CN1052284C ; ②The patent number is ZL01138624.X, the name is "Concrete Pile Construction Method", the authorized announcement date is February 4, 2004, and the authorized announcement number is CN1137314C; ③The patent number is ZL00106288.3, ​​and the name is "Concrete Pile Foundation The date of authorization announcement is September 18, 2002, and the authorization announcement number is CN1091195C), and its disadvantages are: ...

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to solve the problems of complicated procedures and slow construction speed in existing pile-forming methods.

In-hole deep dynamic compaction piles (DDC pile method) have more prominent rammer defects, and several forms have the problem of not being able to ram continuously, and there are major defects in reliability and safety, so a construction device for tamping and expanding piles is provided and the construction method using the device

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