Reclamation area hybrid foundation impact-cone concrete pile construction technology

Abstract

A reclamation area hybrid foundation impact-cone concrete pile construction technology comprises the following steps that a measurement pile casting is buried, wherein according to a designed pile site, the measurement pile casting is buried; mud is made from clay, wherein a mud pit is formed, and mud is prepared; punching is conducted, wherein pile driver is adopted to conduct punching, and punching is stopped when the depth is away from the designed bottom elevation of a steel casing a certain distance; hole verification and primary hole cleaning are conducted, wherein the formed hole is inspected, accepted and cleaned; the steel casting is put down, wherein section-by-section installation is conducted, and the steel casting is put down; secondary punching is conducted, wherein after thesteel casting is well put down, secondary punching is conducted; hole verification and primary hole cleaning are conducted, wherein the formed hole is inspected, accepted and cleaned; a reinforcementsteel cage is made and installed; a conduit is installed, wherein the conduit starts to be installed, and the conduit is put into the hole section by section during installation; secondary hole cleaning is conducted, wherein after the conduit is installed, secondary cleaning is conducted by using the conduit; and concrete is poured. According to the technology, after punching is conducted by a certain distance, the steel casting is put down, the situation that the steel casting is put down too deep can be avoided, the wall protection effect can be achieved, and a collapse accident generated after hole formation is avoided.

Description

technical field [0001] The invention relates to a construction technology of cast-in-situ piles, in particular to a construction technology of perforated cast-in-place piles in mixed foundations in reclamation areas. Background technique [0002] Traditional perforated piles are usually inspected and cleaned after the punching is completed, and then the steel cage is directly lowered, without the need for steel casing and wall protection. However, with the rapid advancement of wharf construction, the area with good geological conditions has basically been built. In order to meet the To meet the needs of economic development, more wharves need to be built. At present, most of the construction sites of seaport wharves are constructed by reclamation from the sea, dredging reclamation from the sea, and backfilling with earth and rocks. Most of these foundations need to be treated, because most of the dredged fill is silt. , soft clay and gravel soil, and the backfill soil is mos...

AI Technical Summary

Problems solved by technology

[0002] Traditional perforated piles are usually inspected and cleaned after the punching is completed, and then the steel cage is directly lowered, without the need for steel casing and wall protection. However, with the rapid advancement of wharf construction, the area with good geological conditions has basically been built. In order to meet the To meet the needs of economic development, more wharves need to be built. At present, most of the construction sites of seaport wharves are constructed by reclamation from the sea, dredging reclamation from the sea, and backfilling with earth and rocks. Most of these foundations need to be treated, because most of the dredged fill is silt. , soft clay and gravel soil, and the backfill soil is mostly mountain soil and rocks. If the wall protection measures are not taken after the hole is cleared for this complex foundation, it is easy to cause the hole to collapse, and the phenomenon of string holes may also occur during the later concrete pouring process.