CN210239593U - Variable cross-section mixing pile machine drill bit - Google Patents

Abstract

The utility model discloses a variable cross section stirring stake machine drill bit belongs to architectural equipment technical field, for solving the drill bit becomes stake cross-section single, easy being designed by the winding problem of geotechnological material. The utility model consists of a drill rod, a soil stirring blade, a soil cutting blade, a connecting rod, a sleeve, a spiral blade and a guniting hole; the drill rod is hollow, and grooves are distributed on the surface of the drill rod; the soil stirring blades are in a propeller shape, and one or more groups of soil stirring blades are arranged according to the pile forming depth; the soil cutting blade is in a shovel shape, and the lower part of the blade is connected with the drill rod through a hinge; the two ends of the connecting rod are respectively connected with the soil cutting blade and the sleeve by hinges; the sleeve is sleeved on the drill rod and can freely slide up and down, and the soil cutting blade is driven to rotate through the connecting rod and the hinge; the spiral blade is in a spiral shape and is arranged at the bottom of the drill rod; the guniting holes are distributed on two sides of the drill rod, and a shell-shaped soil blocking cover is arranged on the guniting holes; the above components are all made of hard alloy. The utility model discloses simple structure, the engineering practicality is strong.

Description

Variable cross-section mixing pile machine drill bit

Technical Field

The utility model belongs to the technical field of underground works equipment, concretely relates to stirring stake machine drill bit especially relates to a novel mixer drill bit.

Background

The cement mixing pile uses cement as a curing agent, soft soil and the curing agent are mixed in the deep part of the foundation through a mixing pile machine and a mortar pump, and the soft soil is hardened into a pile by using the physical and chemical reaction generated between cement paste and the soft soil. The cement mixing pile has the advantages of simple construction, low price and the like, and is widely applied to the field of rock engineering such as foundation treatment, foundation pit support and the like. Due to the complex geological conditions of the construction site, mixing piles with different pile diameters are sometimes required to be constructed in order to meet the design requirements. At present, most of mixing pile machine drill bits are fixed in pile forming section size, if mixing piles with different pile diameters need to be constructed, the drill bits need to be frequently replaced, construction efficiency is low, and engineering cost is increased. When carrying out construction work in soft soil area, geotechnological materials such as geogrid, geotechnological cloth can be laid in the construction field, and cement stirring stake is in the work progress, and geotechnological materials often can twine on the blade of digging of drill bit, causes whitewashing hole to block up, rig card machine, leads to quality problems such as disconnected stake, necking down. In the stirring pile work progress, the drill bit need sink repeatedly, promote, just can fully be with grout and soil stirring, needs longer churning time, and the efficiency of construction is lower. The guniting hole of the drill bit of the mixing pile machine is located at the outer edge of the soil mixing blade and is in direct contact with soil, the guniting hole is easy to block, so that cement paste guniting is insufficient, and the strength of a pile body cannot meet the design requirement. In order to solve the problems, a subject group carries out a large amount of data search, field investigation and relevant experiments for research, and the utility model discloses a variable cross-section stirring pile machine drill bit which has variable cross-section, can cut geotechnical materials, has high soil stirring efficiency and is difficult for a grout spraying hole to block.

Disclosure of Invention

The utility model aims at providing a variable cross section stirring stake machine drill bit, this drill bit not only can change cross sectional dimension, can also cut geotechnological material, stirs simultaneously that soil is efficient, the difficult jam in whitewashing hole, simple structure, and the engineering practicality is strong, and economic technology is feasible.

The utility model adopts the technical proposal that: a variable cross-section mixing pile machine drill bit comprises a drill rod, a soil mixing blade, a soil cutting blade, a connecting rod, a sleeve, a spiral blade and a grout spraying hole; the drill rod is hollow, and grooves are distributed on the surface of the drill rod; the soil stirring blades are in a propeller shape, and one or more groups of soil stirring blades are arranged according to the pile forming depth; the soil cutting blade is in a shovel shape, and the lower part of the blade is connected with the drill rod through a hinge; the two ends of the connecting rod are respectively connected with the soil cutting blade and the sleeve by hinges; the sleeve is sleeved on the drill rod and can freely slide up and down, and the soil cutting blade is driven to rotate through the connecting rod and the hinge; the spiral blade is in a spiral shape and is arranged at the bottom of the drill rod; the guniting holes are distributed on two sides of the drill rod, and a shell-shaped soil blocking cover is arranged on the guniting holes; the above components are all made of hard alloy.

The utility model discloses a construction method is: a variable cross-section mixing pile machine drill bit, while constructing, slide the sleeve pipe up and down along the drilling rod at first, adjust the angle between drilling rod and the soil cutting blade, make the soil cutting radius of the soil cutting blade accord with radius of the pile, screw up the bolt on the sleeve pipe, fix it; then adjusting the position of each soil stirring blade to ensure that the soil stirring blades are uniformly distributed along the drill rod, screwing down the bolts and fixing the soil stirring blades; secondly, fixing the mixing pile machine at a position where a pile needs to be formed, installing a drill bit of the mixing pile machine, starting the pile machine, enabling the soil cutting blade, the spiral blade and the soil mixing blade to rotate along with the drill rod, starting an mortar pump while the drill bit cuts soil, enabling cement slurry to flow through the hollow drill rod, spraying the cement slurry into a soil body from a slurry spraying hole, lowering the drill bit while cutting the soil, and stopping until the drill bit is lowered to a designed elevation; and then, fully mixing the soil body and the cement paste by the soil stirring blades, lifting a drill bit, moving the pile machine to the next pile position, and continuing construction.

The utility model discloses a theory of operation is: a variable cross-section mixing pile machine drill bit can adjust the soil cutting radius of a soil cutting blade through a sliding sleeve, and mixing piles with different radii can be constructed without replacing the drill bit; the spiral cutter head at the lower part of the drill rod can drill holes in the geotechnical materials while drilling soil, and then the soil cutting blade with the sharp edge is used for cutting the geotechnical materials into fragments, so that the phenomenon of blocking caused by the fact that the drill bit is wound by the geotechnical materials is avoided, and the construction efficiency is improved; the soil stirring blades are propeller-shaped, the lime-soil slurry flows downwards from the middle part of the pile hole through high-speed rotation, and flows back upwards from two sides of the pile hole after contacting the bottom of the pile hole (as shown in figure 4), so that the soil and the mortar are fully mixed, a drill bit does not need to sink and lift repeatedly, and the soil stirring efficiency is improved; the shell-shaped soil blocking cover is arranged on the grout spraying hole, so that direct contact with soil is avoided, the probability of blockage of the grout spraying hole is reduced, and the pile forming quality is improved.

The utility model has the advantages that: the utility model provides a variable cross section stirring stake machine drill bit, not only can be according to the size change cross sectional dimension of the footpath of stake of will constructing, can also cut geotechnological material, avoids the drill bit to twine by geotechnological material, takes place the card machine phenomenon, stirs simultaneously that soil is efficient, the grout spraying hole is difficult for blockking up, has improved and has become stake quality and efficiency of construction, simple structure, and technical economy is feasible, and the engineering practicality is strong.

Drawings

Fig. 1 is the utility model relates to a variable cross section stirring stake machine drill bit overall structure schematic diagram.

Fig. 2 is the utility model relates to a variable cross section stirring stake machine drill bit soil cutting blade structure enlarger.

Fig. 3 is the utility model relates to a variable cross-section stirring stake machine drill bit stirs native blade structure sketch map.

FIG. 4 is a schematic illustration of the circulation flow of the lime soil slurry.

Illustration of the drawings: (1) -a drill rod; (2) -a soil-agitating blade; (3) -a soil cutting blade; (4) -a connecting rod; (5) -a sleeve; (6) -a helical blade; (7) -a shotcrete hole; (8) -a recess; (9) -a hinge; (10) -a bolt.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

As shown in fig. 1, a variable cross-section mixing pile machine drill bit comprises a drill rod (1), a soil mixing blade (2), a soil cutting blade (3), a connecting rod (4), a sleeve (5), a spiral blade (6) and a grout spraying hole (7); the drill rod (1) is hollow, and grooves (8) are distributed on the surface of the drill rod; the soil stirring blades (2) are in a propeller shape, and one group or a plurality of groups can be arranged according to the pile forming depth; the soil cutting blade (3) is shovel-shaped, and the lower part of the blade is connected with the drill rod (1) through a hinge (9); two ends of the connecting rod (4) are respectively connected with the soil cutting blade (3) and the sleeve (5) through hinges (9); the sleeve (5) is sleeved on the drill rod (1) and can freely slide up and down, and the soil cutting blade (3) is driven to rotate by the connecting rod (4) and the hinge (9); the spiral blade (6) is in a spiral shape and is arranged at the bottom of the drill rod (1); the guniting holes (7) are distributed on two sides of the drill rod, and a shell-shaped soil blocking cover is arranged on the guniting holes; the above components are all made of hard alloy.

A variable cross-section mixing pile machine drill bit, while constructing, slide the thimble (5) up and down along the drilling rod (1) at first, adjust the angle between drilling rod (1) and the soil cutting blade (3), make the soil cutting radius of the soil cutting blade (3) accord with radius of the pile, tighten the bolt (10) on the thimble (5), fix it; then adjusting the position of each soil stirring blade (2) to be uniformly distributed along the drill rod (1), and screwing down the bolts (10) to fix the bolts; secondly, fixing the pile machine at a position where the pile is to be formed, installing a drill bit of the pile stirring machine, starting the pile machine, enabling the soil cutting blade (3), the spiral blade (6) and the soil stirring blade (2) to rotate along with the drill rod (1), starting an mortar pump while the drill bit cuts soil, enabling cement slurry to flow through the hollow drill rod (1), spraying the cement slurry into a soil body from a slurry spraying hole (7), and lowering the drill bit while cutting soil until the drill bit is lowered to a designed elevation; and then, fully mixing the soil body and the cement paste by the soil stirring blades (2), lifting a drill bit, moving the pile machine to the next pile position, and continuing construction.

Claims (1)

1. A variable cross-section mixing pile machine drill bit is characterized by comprising a drill rod, a soil mixing blade, a soil cutting blade, a connecting rod, a sleeve, a spiral blade and a grout spraying hole; the drill rod is hollow, and grooves are distributed on the surface of the drill rod; the soil stirring blades are in a propeller shape, and one or more groups of soil stirring blades are arranged according to the pile forming depth; the soil cutting blade is in a shovel shape, and the lower part of the blade is connected with the drill rod through a hinge; the two ends of the connecting rod are respectively connected with the soil cutting blade and the sleeve by hinges; the sleeve is sleeved on the drill rod and can freely slide up and down, and the soil cutting blade is driven to rotate through the connecting rod and the hinge; the spiral blade is in a spiral shape and is arranged at the bottom of the drill rod; the guniting holes are distributed on two sides of the drill rod, and a shell-shaped soil blocking cover is arranged on the guniting holes; the above components are all made of hard alloy.

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