Construction method for preformed end bearing pile in lava region

Abstract

A construction method for a preformed end bearing pile in a lava region belongs to the technical field of construction of a pile foundation of a large-tonnage road, bridge, or house in the building industry. The invention provides the construction method for the preformed end bearing pile in the lava region. The construction method for the preformed end bearing pile in the lava region is implemented according to the following sequences: (1) forming a pore; (2) pouring a filler; and (3) pressing the pile. A static pressure large-tonnage pile machine is used to press a reinforced concrete preformed end bearing pile in a CFG (cement flyash gravel) pile in the pore till a bearing stratum set in the design, and two or more reinforced concrete preformed end bearing piles are pressed according to the design requirements to complete the construction. The method provided by the invention is simple in operation, easy in implementation, and wide in scope of geological environments, both the quality of the pile and the construction speed are guaranteed, the cost is also lowered, and the difficult problem of application of the end bearing pile of the static pressure large-tonnage preformed pile in the lava region is solved.

Description

technical field [0001] The invention belongs to the technical field of pile foundation construction for large-tonnage roads, bridges and houses in the construction industry, and in particular relates to a construction method for prefabricated end-bearing piles in lava areas. Background technique [0002] Existing patent technologies such as the invention patent with the application number 200810197604.4 "A Construction Method for Static Pressure High Tonnage Prefabricated End-bearing Piles", which belong to a construction technology of static pressure high tonnage prefabricated end-bearing piles. In the case of interlayered rocks that are slightly thick but fail to meet the design load-bearing requirements, they cannot be used. [0003] In the prior art, the pile foundation construction of large-tonnage roads, bridges, and houses in the construction industry mainly adopts four types of punching (drilling) hole concrete pouring piles, static pressure prefabricated piles, hamm...

AI Technical Summary

Problems solved by technology

Punching (drilling) hole concrete pouring pile: mainly used for large-diameter and high-tonnage foundation construction. It is characterized by long pile body, large diameter, and can go deep into the rock formation, but its cost is high, and it is easy to run out of slurry during construction and damage the geological and hydrological environment; Moreover, the construction period is long, and serious quality defects are prone to occur during construction.

For example, the residue at the bottom of the hole is not easy to clean, necking is easy to occur, the strength of the concrete in the pile body is difficult to control, and the concrete in the pile body forms a broken pile, and the second and third types of piles are more likely to occur during inspection.

Static pressure prefabricated piles: mainly used for the foundation construction of middle and high-rise buildings in cities. Its characteristics are: long piles, high cost, large caps, and external forces are used to force the prefabricated piles into the soil during construction. The piles are easily damaged due to excessive external forces. , the second and third types of piles appear more