Device and method based on static pressure immersed tube hole forming heavy hammer tamping compaction pile

Abstract

The invention discloses a device based on an immersed tube hole forming heavy hammer tamping compaction pile. The device comprises a static pressure pile machine, wherein the static pressure pile machine is connected with an immersed tube; and the front end of the immersed tube is a steel pile tip. The construction method comprises the steps of 1) flatting the site, removing barriers, measuring, paying off, and arranging pile positions according to the designed parameters; 2) moving the static pressure pile machine to one pile position, levelling the pile machine, aligning the immersed tube tip at the pile position through operating longitudinal and horizontal displacement systems, inserting the immersed tube, and arranging two theodolites or plumbing bobs in the vertical direction for adjusting the perpendicularity; 3) continuously observing the perpendicularity of the immersed tube in the first two strokes of the immersed tube, when the immersed tube reaches the designed elevation, stopping tube sinking, slowly pulling out the immersed tube, and moving the pile machine to the next pile position; and 4) before pile forming, measuring the drilling diameter and depth, placing a pile body in a pile hole, and carrying out layered compaction through heavy hammer tamping. The main purposes of guaranteeing the soil compaction effect, reducing the construction cost, reducing noise and causing no environmental pollution are achieved.

Description

technical field

[0001] The invention belongs to the technical field of foundation treatment and construction, and in particular relates to a device and method for compacting and compacting piles based on an immersed tube-forming hole-forming weight hammer. Background technique

[0002] Collapsible loess is a special kind of soil. Under a certain pressure, after sinking and being wetted by water, the soil structure is quickly destroyed and significant additional subsidence occurs. Therefore, construction is carried out on collapsible loess sites. , while satisfying the bearing capacity of the foundation, it is also necessary to consider the possibility of the foundation being wetted by water and the strictness of uneven settlement restrictions during the reuse period to select the appropriate foundation treatment method to prevent the foundation from collapsing and causing damage to the building.

[0003] The treatment methods commonly used to eliminate collapsibility are: ...

Examples

Embodiment

[0033] Poly Qujiang Spring Garden 11# residential building has 33 floors above ground and 2 floors underground. The building site is a self-weight collapsible loess site, and the stratum within 13 meters below the cutting board is collapsible, and its collapsibility grade is III. The foundation treatment plan is to first eliminate the subsidence of the foundation completely, and then build the static pressure pipe pile foundation.

[0034] To eliminate the subsidence of the foundation, the compacted piles are compacted with long auger drilled holes and heavy hammers. The designed hole diameter is 400mm, the pile diameter is greater than 550mm, and the pile spacing is 850mm. The piles are arranged in an equilateral triangle, and the pile length is 13 meters. After the foundation treatment, the average compaction coefficient of the soil between the piles is required to be not less than 0.90, and the compaction coefficient of the pile body is not less than 0.97.

[0035] Eliminat...

technical field

[0001] The invention belongs to the technical field of foundation treatment and construction, and in particular relates to a device and method for compacting and compacting piles based on an immersed tube-forming hole-forming weight hammer. Background technique

[0002] Collapsible loess is a special kind of soil. Under a certain pressure, after sinking and being wetted by water, the soil structure is quickly destroyed and significant additional subsidence occurs. Therefore, construction is carried out on collapsible loess sites. , while satisfying the bearing capacity of the foundation, it is also necessary to consider the possibility of the foundation being wetted by water and the strictness of uneven settlement restrictions during the reuse period to select the appropriate foundation treatment method to prevent the foundation from collapsing and causing damage to the building.

[0003] The treatment methods commonly used to eliminate collapsibility are: ...

Examples

Embodiment

[0033] Poly Qujiang Spring Garden 11# residential building has 33 floors above ground and 2 floors underground. The building site is a self-weight collapsible loess site, and the stratum within 13 meters below the cutting board is collapsible, and its collapsibility grade is III. The foundation treatment plan is to first eliminate the subsidence of the foundation completely, and then build the static pressure pipe pile foundation.

[0034] To eliminate the subsidence of the foundation, the compacted piles are compacted with long auger drilled holes and heavy hammers. The designed hole diameter is 400mm, the pile diameter is greater than 550mm, and the pile spacing is 850mm. The piles are arranged in an equilateral triangle, and the pile length is 13 meters. After the foundation treatment, the average compaction coefficient of the soil between the piles is required to be not less than 0.90, and the compaction coefficient of the pile body is not less than 0.97.

[0035] Eliminat...

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