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Construction method for impact-cone concrete pile

A construction method and punching pile technology, applied in sheet pile wall, foundation structure engineering, blasting and other directions, can solve the problems affecting the quality of punching cast-in-place pile, uneven stress contact surface, incomplete development of boulders, etc. The total amount of explosives, the reinforcing effect is uniform, and the effect of ensuring the blasting effect

Active Publication Date: 2018-09-28
广东梁亮建筑工程有限公司
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the boulders are usually broken by blasting the boulders to reduce the difficulty of construction. However, due to the incomplete development of the boulders, the distribution and development of the boulders are extremely complicated. There are both boulders and soil, which will lead to uneven force contact surface when the pile hammer is impacted, and the hammer is easy to get stuck, and the inclined hole will lead to low verticality of the pile hole, which will seriously affect the quality of the punched cast-in-place pile, and there is still room for improvement

Method used

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  • Construction method for impact-cone concrete pile
  • Construction method for impact-cone concrete pile

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A kind of perforated cast-in-place pile construction method, with reference to figure 1 , including the following steps:

[0046] S001 measuring and setting out, the details are as follows:

[0047] Use theodolite and total station to measure the pile position, insert a steel bar in the center of the pile position, drive a control pile on each side to control the center of the pile position, and fix the control pile with mortar.

[0048] S002 positioning and advanced drilling, details are as follows:

[0049] For high-precision pile positioning, the first hole is drilled at the center of the borehole coordinates. According to the engineering geological survey report, the development of boulders is complex and uncertain, and the second hole is drilled to take cores from the entire hole and take color digital photos. Site exploration holes are designed and arranged, and each hole is drilled into continuous micro-weathered rock for not less than 5.5m.

[0050] S003 Boul...

Embodiment 2

[0068] The difference from Example 1 is that in S004, when the boulders are underdeveloped, causing the impact hammer to hit the pile hole water surface section with both boulders and soil, backfill the cornerstones with a particle size within the range of 40cm-60cm, and then continue to impact Bottom of the pile hole until the design depth is reached.

[0069] Since the particle size of the backfilling cornerstones ranges from 40cm to 60cm, the cornerstones have sufficient volume and are easy to distribute in the pile holes, and there are fewer gaps between adjacent cornerstones.

Embodiment 3

[0071] The difference with embodiment 2 lies in S003, refer to figure 2 , use the PVC pipe buried in the advanced drilling hole 1 as the conduit, and pour water into the PVC pipe 2 during the placement of the PVC pipe. For every 10 meters in length of the PVC pipe, the irrigation water pressure increases by 0.3 MPa. When the length of the PVC pipe is less than 10 meters, the water pressure is increased by 10 Meter calculation to ensure that the PVC pipe position is accurate and there is no sand or soil in the pipe.

[0072] According to the distribution of the boulders 11, high-pressure water is poured into the PVC pipe holes and the explosives 21 are hoisted downward in sections using a scale. According to the distribution height of the boulders 11 shown by advanced drilling, the explosives 21 are placed. 60mm. If a stuck hole is found during the charging process, the charging will be stopped and processed in time. Before the detonator is loaded into the detonating package,...

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Abstract

The invention relates to the field of building construction. In order to solve the problem that the perpendicularity of a pile hole is low as a result of a locking hammer and an inclined hole, the invention provides a construction method for an impact-cone concrete pile. The stress face of an impact hammer is uniform, so that the perpendicularity of the pile hole is relatively high. The technicalscheme is as follows: the construction method comprises the following steps: surveying and setting out; positioning and drilling ahead; boulder blasting; impact holing, impacting again after hornstonebackfilling when a same horizontal section in the pile hole includes boulders and soil mass at the same time; mounting a steel reinforcement cage in the hole; and pouring concrete in the hole. The stress face of the impact hammer is uniformly distributed when the same horizontal section in the pile hole includes boulders and soil mass at the same time by backfilling the hornstones, the conditionthat the perpendicularity of the pile hole is reduced as the result of the locking hammer and the inclined hole is avoided, and the perpendicularity of the pile hole is ensured to further guarantee the quality of the impact-cone concrete pile.

Description

technical field [0001] The invention relates to the field of building construction, more specifically, it relates to a construction method of perforated cast-in-place piles. Background technique [0002] Punched cast-in-situ pile is a kind of cast-in-situ pile. Cast-in-situ piles are formed by directly forming holes on the pile positions at the construction site, and then putting them into steel cages and pouring concrete. In the construction of perforated cast-in-situ piles, holes are punched by punching machines, and holes are formed for mud retaining walls. [0003] When constructing perforated piles in the area of ​​beaded boulders, since the beaded boulders are multi-layered, the number of single pile layers is as high as 9, the vertical height is 0.5m-18.90m, and the maximum thickness of a single layer is up to 8.5m, the total thickness of the boulder is 19.8m, and the lithology of the boulder is granite, which has high hardness and brings great difficulty to the con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/38F42D3/04
CPCE02D5/38F42D3/04
Inventor 黄小红杨娟许建清何涛
Owner 广东梁亮建筑工程有限公司
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