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Apparatus and method for long spiral-drilling enlarging-base agitation and reaming-in-hole concrete filling to form pile

A technology of long helical drilling and long helix, which is applied in the direction of drilling equipment and methods, sheet pile walls, drilling equipment, etc., and can solve the problems of low construction cost, accident-prone, high construction cost, etc.

Inactive Publication Date: 2006-08-09
翟向滨
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a pile-forming method and device for long auger drilling bottom expansion mixing and in-hole reaming concrete pouring piles, so as to overcome the need for secondary drilling tools when performing in-hole reaming in the construction of the prior art Or squeeze expansion device, the construction speed is slow, and the construction cost is high; and the hydraulic cylinder of its bottom expansion mixing device is directly lowered in the pile hole, and the hydraulic cylinder has short service life under the harsh conditions in the pile hole, and is prone to accidents.
Thereby, it overcomes the defect that the drilling tool or extrusion expansion device needs to be lowered twice when performing in-hole reaming in the construction of the prior art, and the construction speed is fast and the construction cost is low

Method used

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  • Apparatus and method for long spiral-drilling enlarging-base agitation and reaming-in-hole concrete filling to form pile
  • Apparatus and method for long spiral-drilling enlarging-base agitation and reaming-in-hole concrete filling to form pile
  • Apparatus and method for long spiral-drilling enlarging-base agitation and reaming-in-hole concrete filling to form pile

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specific Embodiment approach 1

[0007] Specific embodiment one: present embodiment is made up of following steps: one, with long auger drill pile hole to specified depth; ground. 2. Gradually expand several reamers arranged on the long helical drilling tool along the height direction until the reamers are respectively inserted into the hole wall of the pile hole, and at the same time, the grouting pipe arranged on the long auger The grout is injected at the bottom of the hole, during which the long auger drill is always rotating; the grout is mainly composed of cement and water, the weight ratio of water and ash is generally about 0.6, and the pressure of grouting is about 2Mpa. 3. The long helical drilling tool is gradually lifted up to complete the expansion and stirring of the bottom of the pile hole by the reaming cutter located at the lower end of the long auger drilling tool, and the partial expansion of the hole wall of the pile hole by other reaming cutters; 4. Stop grouting and retract the reaming c...

specific Embodiment approach 2

[0008] Specific embodiment two: this embodiment is made up of the following steps: one, drill the pile hole with the long helical drilling tool to the specified depth; The reamers are respectively inserted into the hole wall of the pile hole, and at the same time, the grout is injected into the bottom of the pile hole from the grouting pipe arranged on the long auger. During this period, the long auger always rotates; 3. The long auger gradually lifts up Complete the bottom expansion and stirring of the bottom of the pile hole by the reamer located at the lower end of the long auger and the local expansion of the wall of the pile hole by other reamers; 4. Stop grouting and retract the reamer; 5. Through the long auger Concrete is poured into the bottom of the pile hole in the internal cavity; six, a long auger is proposed, and the reinforcement cage 20 is inserted into the pile hole manually or by a vibrating device, and then the concrete is solidified into a pile.

specific Embodiment approach 3

[0009] Specific embodiment three: the difference between this embodiment and embodiment two is: in step one, the long auger drill is spraying water or mud to the pile hole through the grouting pipe while drilling, and the mud is mixed evenly by water and clay. become. With this arrangement, the stone chips on the hole wall can be washed down and returned to the ground, and at the same time, the surface of the hole wall is more stable and not easy to collapse. Other steps are the same as the second embodiment.

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Abstract

This invention relates to a method and a device for club-footed mixing in hole bottom by long screw driller and reaming in hole to pour concrete in pile, in which, several knives are spread on a long screw drilling tool after drilling the pile hole and plug into the walls of the hole separately and a grout pipe penetrates grout to the bottom of the pile hole, then the drilling tool is taken out and a reinforcing cage is plug into the hole to be poured with concrete to become a pile, the other method is that utilizing the hollow long screw drilling tool to pour concrete into the pile hole to form a pile. A cylinder hinged on a dynamic box drives a tension rod and a hinged rod pin-jointed between the spread knives and the tension rod pushes the knives to finish the expansion movement.

Description

technical field [0001] The invention relates to a pile forming method and a construction device for long helical drilling, bottom expansion and stirring, hole expansion in the hole, and concrete pouring pile. Background technique [0002] The long auger bored cast-in-place piles widely used at present mainly include two types of piles, one is dry auger bored cast-in-place piles, and the other is the auger center pumped concrete cast-in-place piles. The disadvantage of the former is that it is only suitable for construction under the geological conditions of dry drilling, and in general, the pile ends must be designed in relatively stable formations (such as sand layers), while dry auger drilling cannot form holes in sand layers. , to form a large head at the bottom of the collapsed hole can only be formed by bottom expansion and stirring. If a partially enlarged structure is to be formed on the hole wall (that is, hole expansion in the hole), the drilling tool or extrusion d...

Claims

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Application Information

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IPC IPC(8): E02D5/46E02D5/48E21B7/28
Inventor 翟向滨
Owner 翟向滨
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