CN201190279Y

CN201190279Y - Construction equipment for spiral digging small-diameter bored pile

Info

Publication number: CN201190279Y
Application number: CNU2008200053121U
Authority: CN
Inventors: 郝长明; 孙宝; 王立新; 栗志波
Original assignee: BEIJING NEW ORIENTAL STAR PETROCHEMICAL ENGINEERING Co Ltd
Current assignee: BEIJING NEW ORIENTAL STAR PETROCHEMICAL ENGINEERING Co Ltd
Priority date: 2008-03-11
Filing date: 2008-03-11
Publication date: 2009-02-04
Anticipated expiration: 2018-03-11

Abstract

The utility model discloses construction equipment for rotatably drilling small-diameter filling piles, which comprises a slurry supplementing device and a split type rotatably drilling hopper. The slurry supplementing device consists of an inside guard barrel and an outside guard barrel, wherein, the inner guard barrel is downwards put at a position at which a pile body is made, and the downwards-putting depth of the inner guard barrel is determined according to the stratum condition; the outside guard barrel is sleeved outside the inside guard barrel and is fixed on the ground, and a breach facilitating the slurry supplement is arranged on the inside guard barrel; a side cutter is fixedly arranged on the outer side face of the drill wall of the split type rotatably drilling hopper, and a pear plate presents a taper shape when the split type drilling hopper is folded together. The utility model has fast slurry supplement, little distorting deformation of the drill, high efficacy, small pore-forming diameter and high pore-forming quality.

Description

Revolve and dig the mini-pile construction equipment

One, technical field:

The utility model relates to equipment used in a kind of Foundation Treatment, relates in particular to a kind of construction equipment that becomes mini-pile with rotary drilling rig.

Two, background technology:

Rotary digging drilling hole bored concrete pile is after utilizing the rotary drilling rig pore-forming, transfers reinforcing cage, concrete perfusion forms.Rotary drilling rig is with brute force bucket bore to be screwed in undergroundly, in the backspin process soil body that cuts out is packed into and bores in the bucket, will bore bucket and propose to dig under the continuation after the casting, until desired depth outside the hole.Scrape out the mud that hole process mesopore domestic demand keeps certain liquid level revolving,, prevent that hole wall from subsiding with the balance pipe internal pressure.Be provided with mud pit during construction specially, guarantee mud circulation by slush pump, dig between mud pit and stake hole and be provided with irrigation canals and ditches, mud is back to mud pit during the pore-forming perfusion.

Rotary drilling rig is used for the construction of diameter at the above large-section in-situ concrete pile of φ 800mm more, and it has huge advantage than rotary drill commonly used at aspects such as pore-forming effect, mud emissions.But for the castinplace pile of diameter about φ 600mm, then generally do not use the rotary drilling rig pore-forming, its reason mainly contain following some:

1, drilling rod is thick with respect to the diameter of pile, can cause the huge fluctuating of mud face during normal upper and lower drilling rod.Conventional benefit paste-making method is to utilize the mud gravity flow, or with slush pump mud is transported in the boring with pipe from mud pit, all can not mend slurry rapidly, easily causes the hole of collapsing.The speed of mending slurry during with slush pump is relevant with the power of the thickness of pipe and slush pump, must not only increase to mend and starch cost with powerful tonified the slurry pump and extra heavy pipe transportation if think to mend rapidly slurry, still can't satisfy the needs that rapid benefit is starched to a certain extent.

2, because drill bit is too little, can't built-in slurry channel, can at the bottom of the hole, form negative pressure during trip-out, at the bottom of the SS, cause reaming, mud can only be from flowing between the drill bit and the borehole wall simultaneously, and speed soon and wash away the borehole wall easily causes the hole of collapsing.

3, during pore-forming as using bucket to bore, when proposing outside the hole casting behind the following rotary-cut soil, because of the bucket drill diameter is too little, cause the casting difficulty, easy damaged equipment; If use conventional two lobe drill bits, the asynchronous distortion of pressurized state two lobe drill bodies, and be prone to and dilate, cause institute's pile bore dia bigger than normal, and drill bit damage easily.

Scrape out small diameter bore with revolving, existence for above-mentioned reasons causes easy generation stake hole to cave in or reaming, and workmanship descends, cost increases sharply, margin of safety descends thereby make.

Three, summary of the invention:

The purpose of this utility model is exactly to solve now with the problems referred to above that exist in the technology, provides a kind of revolving to dig the mini-pile construction equipment, adopts this construction equipment bored pile, mend slurry rapidly, the drill bit torsional deformation is little, the effect height, drilling diameter is little, the hole quality height.

For finishing above-mentioned purpose, technical solution of the present utility model is: a kind of revolving dug the mini-pile construction equipment, and it comprises mends sizing device and split type rotary drilling digger; Mending sizing device is slightly less than by diameter and protects bucket and major diameter in the pile body diameter and protect outward and barrel form, in protect under the bucket and be put in and will do the pile body position, determine that according to strata condition it transfers the degree of depth, protect casing outward outside it, fix on the ground, in protect and have the gap of being convenient to mend slurry on the bucket; Split type rotary drilling digger comprises split type drilling bucket and the drilling rod that is fixed together opening or closing, split type drilling bucket comprises brill wall, fagging, the pears plate of split and bores tooth, be installed with side tool on the lateral surface of brill wall, split type drilling bucket lumps together the tapered state of back pears plate.

Because the utility model has installed the inside and outside benefit sizing device that bucket is formed that protects additional, in protecting bucket, injects rotary drilling rig operation forward direction a certain amount of mud earlier, solved the situation that mud can not in time be supplied with when creeping into.Constantly outwards protect additional mud in the bucket by slush pump revolving when scraping out the hole, the height that keeps the mud face, mud rapidly at the bottom of the return port when boring to guarantee to carry has at every turn effectively weakened the formation of negative pressure at the bottom of the hole, avoid the exposed time on stake top, hole simultaneously, reduced the possibility that the stake hole caves in.Because the piling zone earthen fill zone of being everlasting, in protect bucket and also guaranteed hole quality.

The utility model has improved conventional drilling bucket, has changed the pears plate setting angle of split type drilling bucket, has suitably increased drill bit and has radially gone out sword, and install side tool on the lateral surface that bores wall, can guarantee drilling diameter under the situation of the size that reduces the drill bit staving.With the most common φ 600mm stake is example, and the staving of φ 600 drill bits is reduced to φ 500mm by φ 560mm, has increased logical slurry cross section, reduces mud speed rate, has avoided mud to wash away hole wall.Adjusted simultaneously and installed the cutting angle and the shape of boring tooth additional, conveniently advanced soil; Change the brill tooth of split type drilling bucket into the conical surface by plane distribution and distribute, make that drill body is subjected to the huge power of holding tightly in the pressure process, can eliminate irregular torsional deformation effect, improve steering capability, improve vertical degree of the peg hole.Above measure all maximum possible minimizing cause the factor in hole of collapsing, and guaranteed the quality of pore-forming.

Four, description of drawings

Below in conjunction with accompanying drawing the utility model is further described:

Fig. 1 is an assembly structure schematic diagram of mending sizing device in the utility model;

Fig. 2 is the sectional view of split type drilling bucket in the utility model;

Fig. 3 is the upward view of split type drilling bucket in the utility model.

Five, the specific embodiment:

As Fig. 1, Fig. 2, shown in Figure 3, present embodiment comprises mends sizing device and split type drilling bucket; Mending sizing device is slightly less than by diameter and protects bucket 2, major diameter in the pile body diameter and protect outward that bucket 3 forms, in protect bucket and be put in for 2 times and will do the pile body position, according to strata condition its lower end being probeed into earthen fill zone 5 omits in the undisturbed soil 6 of below, protecting bucket 3 outward is placed in outside it, fix on the ground, in protect bucket and have the gap of being convenient to mend slurry on 2.4 is mud, and 1 is drilling rod.Split type rotary drilling digger comprises the split type drilling bucket that is fixed together opening or closing, and split type drilling bucket comprises brill wall 11, fagging 13, the pears plate 14 of split and bores tooth 15.Be installed with side tool 12 on the lateral surface of brill wall 11, split type drilling bucket lumps together back pears plate 14 tapered states.Bore wall 11 and be divided into movable jaw lobe 9 and movable jaw lobe 10.8 is hinge.

Claims

1, a kind of revolving dug the mini-pile construction equipment, and it comprises split type rotary drilling digger, and split type rotary drilling digger comprises split type drilling bucket and the drilling rod that is fixed together opening or closing, and split type drilling bucket comprises brill wall, fagging, the pears plate of split and bores tooth; It is characterized in that: further comprising the benefit sizing device, mending sizing device is slightly less than by diameter and protects bucket and major diameter in the pile body diameter and protect outward and barrel form, in protect under the bucket and be put in and will do the pile body position, determine that according to strata condition it transfers the degree of depth, protect casing outward outside it, fix on the ground, in protect and have the gap of being convenient to mend slurry on the bucket.

2, according to claim 1 revolving dug the mini-pile construction equipment, it is characterized in that: be installed with side tool (12) on the lateral surface of the brill wall (11) of described split type drilling bucket, split type drilling bucket lumps together the tapered state of back pears plates (14).