Pile foundation lining material and construction method of prefabricating prestressed pipe pile using pile foundation lining material

A technology of prestressed pipe piles and construction methods, which is applied in the direction of foundation structure engineering, sheet pile walls, buildings, etc., to achieve the effects of reducing production costs, solving environmental pollution, and having obvious environmental protection effects

Inactive Publication Date: 2018-04-27

中冶沈勘工程技术有限公司

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AI-Extracted Technical Summary

Problems solved by technology

In the prior art, there is no design and construction of using auger drill...

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Abstract

Provided are a pile foundation lining material and a construction method of prefabricating a prestressed pipe pile using the pile foundation lining material. The pile foundation lining material comprises, by weight, 4-5% of iron tailings, 1-1.2% of cement, 0.15% of fly ash, and 1.2-1.4% of water. The construction method includes the following steps that after drilling, according to the proportion,raw materials are taken and mixed, the pile foundation lining material is obtained and injected into a jackrod of a drilling machine; perfusion is performed to reach a perfusion level, a prefabricated prestressed pipe pile is pressed to a design depth, and simultaneously the pile foundation lining material is compacted, so that the pile foundation lining material is tightly combined with the prestressed pipe pile; the liquid level of the pile foundation lining material is upraised to the top of the pile by 0.5-1.0 m; and the pile foundation lining material is maintained to a design strength to form a solidified body, and the construction process of prefabrication of the prestressed pipe pile using the pile foundation lining material is completed. The pile foundation lining material is environmentally friendly, pile foundation concrete is saved, and the construction method of prefabricating the prestressed pipe pile using the pile foundation lining material solves the problems of the bearing capacity of the pile foundation, the load transmission between the pile and the ground, the combination of the pile and an upper structure and so on; and at the same time, the production cost is greatly reduced, the production efficiency is increased, and the application range is wide.

Application Domain

Bulkheads/piles

Technology Topic

EngineeringPre stress +9

Image

Examples

Experimental program(4)

Example Embodiment

[0085] Example 1

[0086] A pile foundation lining material includes components and their weight ratios as follows: iron tailings: cement: fly ash: water=4:1:0.15:1.2.

[0087] The construction method of prefabricated prestressed pipe piles using the pile foundation lining material includes the following steps:

[0088] Step 1, pile hole construction:

[0089] Use an auger to drill the pile hole at the corresponding position, the diameter D and depth of the pile hole are determined according to the design requirements, and the depth of the hole bottom reaches the design pile end bearing layer;

[0090] Step 2. Prepare pile foundation lining material:

[0091] Taken separately according to the ratio, iron tailings: cement: fly ash: water = 4:1:0.15:1.2; stir after mixing to form composite iron tailings mortar, which is used as pile foundation lining material, among which iron tailings is The iron tailings that have passed the radiation inspection are fine tailing silt sand, middle tailing sand and coarse tailing sand used as fine aggregates of mortar.

[0092] Step 3. Lining material for pouring pile foundation:

[0093] Use the auger hollow pipe to inject the prepared pile foundation lining material into the drill pipe of the drilling rig by pumping, while pouring the pile foundation lining material while lifting the drill pipe, and pouring the pile foundation lining material to the designed injection elevation;

[0094] Step 4. Press pile:

[0095] After the pile driver is in place, according to the design position, the precast prestressed pipe pile is hoisted to the center of the pile hole, the verticality of the pile body is corrected, the precast prestressed pipe pile is statically pressed down to the design depth, and the pile foundation lining material is compacted to make it Closely combine with the prestressed pipe pile and raise its liquid level to 0.7m from the top of the pile, and maintain the pile foundation lining material until the compressive strength reaches 8.5MPa, forming a solidified body, and complete the construction of the precast prestressed pipe pile using the pile foundation lining material Process, the plan view of precast prestressed pipe pile and pile hole figure 2 As shown, the cross-sectional view is as image 3 Shown.

Example Embodiment

[0096] Example 2

[0097] A pile foundation lining material includes components and their weight ratios as follows: iron tailings: cement: fly ash: water: retarder=4:1.2:0.15:1.2:0.002.

[0098] The construction method of prefabricated prestressed pipe piles using the pile foundation lining material includes the following steps:

[0099] Step 1, pile hole construction:

[0100] Use an auger to drill the pile hole at the corresponding position, the diameter D and depth of the pile hole are determined according to the design requirements, and the depth of the hole bottom reaches the design pile end bearing layer;

[0101] Step 2. Prepare pile foundation lining material:

[0102] According to the proportion, take separately, iron tailings: cement: fly ash: water: retarder, early strength agent or antifreeze = 4:1.2:0.15:1.2:0.002; stir after mixing to form composite iron tailing mortar , As the pile foundation lining material, among them, the iron tailings are the iron tailings that have passed the radiation inspection, and the iron tailings are the fine tailing silt sand, and the middle tailing sand and the tailing coarse sand are used as fine aggregates of mortar.

[0103] Step 3. Lining material for pouring pile foundation:

[0104] Use the auger hollow pipe to inject the prepared pile foundation lining material into the drill pipe of the drilling rig by pumping, while pouring the pile foundation lining material while lifting the drill pipe, and pouring the pile foundation lining material to the designed injection elevation;

[0105] Step 4. Press pile:

[0106] After the pile driver is in place, according to the design position, the precast prestressed pipe pile is hoisted to the center of the pile hole, the verticality of the pile body is corrected, the precast prestressed pipe pile is statically pressed down to the design depth, and the pile foundation lining material is compacted to make it Tightly combine with the prestressed pipe pile and raise its liquid level to 0.5m from the top of the pile, and maintain the pile foundation lining material until the compressive strength reaches 12MPa, forming a solidified body, and complete the construction process of using the pile foundation lining material to precast the prestressed pipe pile , The plan view of prefabricated prestressed pipe pile and pile hole is as figure 2 As shown, the cross-sectional view is as image 3 Shown.

Example Embodiment

[0107] Example 3

[0108] A pile foundation lining material includes components and their weight ratios: iron tailings: cement: fly ash: water: early strength agent = 5:1:0.15:1.4:0.015.

[0109] The construction method of prefabricated prestressed pipe piles using the pile foundation lining material includes the following steps:

[0110] Step 1, pile hole construction:

[0111] Use an auger to drill the pile hole at the corresponding position, the diameter D and depth of the pile hole are determined according to the design requirements, and the depth of the hole bottom reaches the design pile end bearing layer;

[0112] Step 2. Prepare pile foundation lining material:

[0113] Taken separately according to the ratio, iron tailings: cement: fly ash: water: early strength agent = 5:1:0.15:1.4:0.015; after mixing, stir to form composite iron tailings mortar, which is used as the pile foundation lining material. Among them, the iron tailings are iron tailings that have passed radiation inspection, and the iron tailings are fine silt tailings, medium tailings and coarse tailings used as fine aggregates of mortar.

[0114] Step 3. Lining material for pouring pile foundation:

[0115] Use the auger hollow pipe to inject the prepared pile foundation lining material into the drill pipe of the drilling rig by pumping, while pouring the pile foundation lining material while lifting the drill pipe, and pouring the pile foundation lining material to the designed injection elevation;

[0116] Step 4. Press pile:

[0117] After the pile driver is in place, according to the design position, the precast prestressed pipe pile is hoisted to the center of the pile hole, the verticality of the pile body is corrected, the precast prestressed pipe pile is statically pressed down to the design depth, and the pile foundation lining material is compacted to make it Tightly combine with the prestressed pipe pile and raise its liquid level to 0.8m from the top of the pile, and maintain the pile foundation lining material until the compressive strength reaches 6MPa, forming a solidified body, and complete the construction process of using the pile foundation lining material to precast the prestressed pipe pile , The plan view of prefabricated prestressed pipe pile and pile hole is as figure 2 As shown, the cross-sectional view is as image 3 Shown.

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PUM

Property	Measurement	Unit
Compressive strength	8.5	mPa
Compressive strength	10.5	mPa
tensile		MPa
Particle size		Pa
strength	10

Description & Claims & Application Information

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Pile foundation lining material and construction method of prefabricating prestressed pipe pile using pile foundation lining material

AI-Extracted Technical Summary

Problems solved by technology

Abstract

Image

Examples

Example Embodiment

Example Embodiment

Example Embodiment

PUM

Description & Claims & Application Information

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