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Rock-socketed hollow precast pile and rock-socketed construction method using precast pile

A technology of prefabricated piles and hollow piles, applied in sheet pile wall, foundation structure engineering, construction, etc., can solve the problems of steep inclination of bedrock surface, uneconomical, complicated procedures, etc. Good quality controllability

Inactive Publication Date: 2021-02-05
WUHAN SURVEYING GEOTECHN RES INST OF MCC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to solve the problem that the existing rock-socketing technology is not economical enough and the implementation process is complicated, and proposes a hollow prefabricated pile for rock-socketing and a method for rock-socketing construction using the prefabricated pile. The prefabricated pile structure can realize simple and effective For rock-socketing construction, even if the thickness of the soil layer on the site varies greatly, or the soil layer with higher strength above the lower bedrock surface is thinner, or the bedrock surface is steeply inclined, or the medium-weathered or slightly-weathered hard rock used for embedding is directly covered Hollow prefabricated piles can be smoothly embedded in soft soil and other conditions

Method used

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  • Rock-socketed hollow precast pile and rock-socketed construction method using precast pile
  • Rock-socketed hollow precast pile and rock-socketed construction method using precast pile
  • Rock-socketed hollow precast pile and rock-socketed construction method using precast pile

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] The rock-socketed construction method provided in Example 1 is to use hammering pile sinking equipment, prefabricated pipe piles use prestressed pipe piles, and the force-transmitting skeleton adopts steel reinforcement skeletons. Marine silt, gravel residual soil, hard bedrock. Concrete implementation steps are as follows:

[0065] (1) Excavate large rocks in the replacement site, level the site, and assemble hammering pile sinking equipment;

[0066] (2) Factory custom-made the first pile section with hollow prefabricated pile rock-socketed pile tips, cured until the strength reaches the design value, transported to the site, aligned according to the designed pile position, and adjusted the verticality;

[0067] (3) Hammer sinking into the first pile, when the top of the first pile is 50-100cm away from the ground surface, the pile is ready to be connected, and the pile is fully welded by air pressure shielded welding;

[0068] (4) Hammer pile-sinking piles section ...

Embodiment 2

[0073] The rock-socketed construction method provided in Example 2 is to use hammering pile sinking equipment, the prefabricated piles adopt prestressed pipe pile type, and the force transmission frame adopts the post-socketed rock-socketing method of steel skeleton (or steel cage). To throw and fill block rock soil, marine silt, pebble gravel residual soil, and hard bedrock, the specific implementation steps are as follows:

[0074] (1) Excavate large rocks in the replacement site, level the site, and assemble hammering pile sinking equipment;

[0075] (2) Factory custom-made the first pile section with hollow prefabricated pile rock-socketed pile tips, cured until the strength reaches the design value, transported to the site, aligned according to the designed pile position, and adjusted the verticality;

[0076] (3) Hammer sinking into the first pile, when the top of the first pile is 50-100cm away from the ground surface, the pile is ready to be connected, and the pile is ...

Embodiment 3

[0083] Embodiment 3 is a rock-socketing construction method after prefabricated reinforced concrete framework of hammering prestressed pipe piles, which is suitable for strata still filled with rocky soil, marine silt, pebble and gravel residual soil, and hard bedrock. The specific implementation steps as follows:

[0084] (1) Excavate large rocks in the replacement site, level the site, and assemble hammering pile sinking equipment;

[0085] (2) Factory custom-made the first pile section with hollow prefabricated pile rock-socketed pile tips, cured until the strength reaches the design value, transported to the site, aligned according to the designed pile position, and adjusted the verticality;

[0086] (3) Deeply prefabricate the inner core reinforced concrete (or steel reinforced concrete, or steel pipe concrete) force transmission framework according to the design requirements. The outer diameter of the force transmission framework is 40-80mm smaller than the nominal inner...

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Abstract

The invention provides a rock-socketed hollow precast pile and a rock-socketed construction method using the precast pile. The precast pile comprises a hollow pile body and a rock-socketed pile tip. The rock-socketed pile tip comprises a steel pipe pile joint section and a big-end-up circular-truncated-cone-shaped pile tip prefabricated by concrete, the steel pipe pile joint section comprises a thin-wall steel pipe, core filling concrete filled in the thin-wall steel pipe and a plurality of stiffening plates welded to the outer wall of the thin-wall steel pipe, and the core filling concrete and the circular-truncated-cone-shaped pile tip are integrally formed in a pouring mode. When rock-socketed construction is carried out, firstly, pile sinking equipment is adopted for sinking a precastpile till drilling footage is difficult, then, a rock core drilling machine is adopted for drilling or crushing plain concrete filling cores at the pile tip part and a hard soil layer and a rock stratum below the pile tip part from the hollow part of a pile body of the hollow precast pile to the designed pile bottom elevation, and a rock-socketed section pile hole is formed; and finally, the forcetransmission framework is put in, cementing materials are injected, and construction of the hollow precast rock-socketed pile is completed.

Description

technical field [0001] The invention relates to the technical field of prefabricated pile construction, in particular to a hollow prefabricated pile for rock-socketing and a rock-socketing construction method using the prefabricated pile. Background technique [0002] Due to the scarcity of land resources in the country, the land resources available for national construction are decreasing day by day. Many current projects can only be constructed on seaside barren hills that do not have farming or other economic value. The construction site is formed by high filling and low seaside hills. Soft soil with high moisture content, low strength, and gradually increasing thickness is widely distributed along the topography of the site. The pile foundation of this type of construction site usually adopts cast-in-place piles or prefabricated pile foundations. The construction and maintenance period of cast-in-place piles on site is long, and a large amount of mud is produced during ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/30E02D5/72E02D5/66E02D5/50E02D7/00
CPCE02D5/30E02D5/50E02D5/66E02D5/72E02D7/00
Inventor 肖玉成陈斌丁洪元谢亮李春磊阳小良王辉
Owner WUHAN SURVEYING GEOTECHN RES INST OF MCC
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