CN104563104B - Pile work drilling machine is with coordinated type breast wall apparatus and use its construction method - Google Patents

Abstract

The invention relates to a linked wall protection device for a pile drilling rig and a construction method using the same, relating to a device used in the construction of two-way spiral soil-extruding cast-in-place piles and a construction method using the device. The purpose of the utility model is to provide an interlocking wall protection device for a pile drilling rig which is easy to operate and can improve the pile quality and a construction method using the same. The linked wall protection device for piling drilling rigs in the present invention includes a force transmission cylinder (1), a guide cylinder (2), a centering bracket (3), a casing (4), a pulling casing device (5) and a lifting device , the lower end surface of the power transmission cylinder is provided with lower end teeth (101), and the upper end surface of the casing is provided with upper end teeth (401). The construction method using the interlocking type wall protection device for piling drilling rigs in the present invention includes 1) equipment assembly; 2) drilling rig spinning into holes and steel casing screwing in; 3) drilling bit upspin lifting and pressure pouring concrete; 4) planting 5) Pull out the steel casing.

Description

Interlocking wall protection device for pile drilling rig and construction method using same

technical field

The invention relates to the field of civil and construction engineering, in particular to a device used in the construction of two-way spiral soil-squeezing grouting piles and a construction method using the device.

Background technique

In the field of pile foundation engineering and foundation treatment engineering, for projects with basement structures, there are usually two options for the construction of concrete pouring piles or plain concrete pouring piles: one is to excavate the foundation pit first and then carry out the construction of cast-in-place piles; The cast-in-place piles are constructed first, and then the foundation pit is excavated.

The scheme of excavating the foundation pit first and then constructing the pile foundation cannot be implemented in the case of short construction period, the bearing capacity of the soil layer at the bottom of the foundation pit cannot meet the construction operations of large pile drilling rigs, and there is no effective drainage of groundwater.

The scheme of constructing cast-in-place piles first and then excavating the foundation pit is to construct the cast-in-place piles on the surface to the ground or below the ground, then excavate the foundation pit to the bottom of the pit, and cut off and chisel the foundation piles above the ground. This conventional construction method results in a large waste of concrete material and increased project costs.

The two-way spiral soil squeezed pile is a new type of pile foundation technology developed by China Metallurgical Construction Research Institute Co., Ltd. For the specific content of the extrusion pile construction method, please refer to the invention patent of "two-way spiral extrusion pile construction method and two-way spiral closed extrusion drill bit" applied by China Jingye Engineering Technology Co., Ltd. on February 15, 2007, and its patent number is ZL200710063983. 3. The authorization announcement date is December 16, 2009. However, when this pile type is applied in some areas, especially in soft soil areas, it will face problems such as easy collapse of the upper pile hole, easy occurrence of mud inclusions in the process of concrete pressure grouting, and easy occurrence of mud entering the hole when the reinforcement cage is inserted later. .

Contents of the invention

The present invention is based on the existing two-way spiral extrusion expansion pile construction method and drilling rig equipment, and provides a pile drilling rig linkage wall protection device with simple operation and better pile quality and a construction method using the same.

The interlocking wall protection device for piling drilling rig in the present invention comprises a force transmission cylinder, a guide cylinder, a centering bracket, a casing, a drawing casing device and a lifting device, and the power transmission cylinder, the guide cylinder and the centering bracket are composed of It is fixed on the drill pipe of the piling drilling rig from top to bottom in turn. The pulling casing device is an open-close structure, which can clamp the casing when it is closed, and can loosen the casing when it is opened. The casing is set Outside the drill pipe and the inner diameter of the casing is greater than the outer diameter of the drill bit at the lower end of the drill pipe, the outer diameters of the guide cylinder and the centering bracket are smaller than the inner diameter of the casing, and the lower end surface of the power transmission cylinder is provided with lower teeth, so The upper end surface of the casing is provided with upper teeth capable of interlocking with the lower teeth, the casing is clamped in the pulling casing device, and the lifting device drives the pulling casing device to rise or fall.

In the linkage type wall protection device for piling drilling rigs in the present invention, the pulling casing device includes a clamping plate, and the clamping plate is composed of two steel plates, each steel plate is provided with a semicircular notch, two semicircular notches Symmetrically arranged, each steel plate is connected with a hydraulic pump, and the two hydraulic pumps symmetrically control the opening or closing of the clamps at the same time. When the clamps are closed, the two semicircular gaps form a full circular gap.

The linked wall protection device for piling drilling rigs in the present invention, wherein the lifting device includes upper and lower fixed pulleys and steel wire ropes, the upper fixed pulleys are installed on the power head of the piling drilling rig, and the lower fixed pulleys are installed on the drawing casing On the device, the steel wire rope is sheathed between the upper and lower fixed pulley blocks.

In the interlocking wall protection device for piling drilling rigs of the present invention, the centering bracket includes a steel ring welded to the outer wall of the drill pipe, and the drill pipe is located at the center of the ring.

In the interlocking wall protection device for pile drilling rigs of the present invention, a clamping platform is provided on the outer wall of the upper end of the casing, and the clamping platform is located below the teeth at the upper end.

In the interlocking wall protection device for piling drilling rigs in the present invention, the force transmission cylinder and the guide cylinder are symmetrical double-lobed structures, and the double petals are connected by bolts and wrapped on the outer wall of the drill pipe and fixed with the drill pipe.

In the linkage type wall protection device for piling drilling rigs in the present invention, the lower end teeth of the force transmission cylinder are flat steel teeth that are evenly distributed along the lower end surface of the force transmission cylinder and the tooth pitch is greater than the tooth width, and the upper end teeth of the protection cylinder are also These are flat steel teeth evenly distributed along the upper end surface of the casing and the tooth pitch is greater than the tooth width, and the casing is a steel casing.

In the interlocking wall protection device for pile drilling rigs of the present invention, the lower end of the guide cylinder is in the shape of an inverted cone.

The construction method of using the interlocking type wall protection device for piling drilling rig in the present invention comprises the following steps,

1) Equipment assembly: Install the force transmission cylinder, guide cylinder and centering bracket sequentially from top to bottom on the drill pipe of the pile drilling rig, and put them through the two-way helical extruding and expanding drill bit to lift and pull the casing device. The pile drilling rig follows the known The method is in place, the concrete pump is ready, and the cast-in-place pile is prepared, and the pile is any one of concrete pile, cement fly ash gravel pile, tailings mortar pile or cement steel slag pile;

2) The drilling rig is spinning to form a hole and the steel casing is screwed in: After the pile drilling rig is in place, start the drilling rig, and use the two-way spiral extruding and expanding drill bit to perform down-spinning and expanding to form a hole. After the pile hole is extruded to a certain depth, the steel casing The steel teeth at the upper end of the cylinder engage with the steel teeth at the lower end of the power transmission cylinder, the lower end of the steel casing reaches the orifice, the clamping plate of the pulling casing device is opened, and the steel casing is released to ensure that the pulling casing device does not affect the free rotation of the steel casing And play the role of righting, continue to apply clockwise torque and down pressure, so that the steel casing is rotated into the hole in conjunction, and when the upper part of the steel casing and the pulling casing device reach near the ground, the drilling can be stopped and the The steel teeth at the upper end of the steel casing are separated from the steel teeth at the lower end of the power transmission cylinder;

3) Drill bit upscrewing and concrete pouring: start the piling rig to apply clockwise torque and pulling force, so that the two-way helical extruding drill bit rotates upward and then rotates again to extrude the upper pile hole. While lifting, start the concrete pump to pour concrete into the pile hole that has been squeezed and expanded. Through the pressure squeeze and expansion of the concrete, the pile diameter of the completed concrete pile section meets the design requirements. The filling process will continue until the design elevation of the pile top, after which the two-way helical extruding drill bit will be hoisted out of the steel casing;

4) Implantation of reinforcement cages, reinforcement bundles or section steel: use the drilling rig pile frame and auxiliary hoist to lift and implant reinforcement cages, reinforcement bundles or section steel. When the reinforcement cage, reinforcement bundle or section steel cannot sink under its own weight, use The vibratory hammer implants the reinforcement cage, tendon or section steel into the pile body, and the implantation depth must meet the design requirements;

5) Pull out the steel casing: After the above-mentioned procedures are completed, use the power of the drilling rig power head and the pulling casing device to clamp the upper part of the steel casing and pull out the steel casing, and the foundation pile construction is completed.

In the construction method using the linkage type wall protection device for pile drilling rig in the present invention, in the step 1), the force transmission cylinder and the guide cylinder are all installed on the first drill rod under the power head of the pile drilling rig, centered The bracket is installed at the middle and lower part of the drill pipe, and the initial drilling depth of the drilling rig is about the length of the steel casing or the depth of the foundation pit. In the step 2), the two-way helical extrusion drill bit is rotated down at a speed of 4 to 14 rpm to form the hole , when the top of the steel casing reaches the specified elevation, and the two-way helical extruding drill bit rotates and drills and expands the hole to the design depth, the drilling can be stopped. In the step 3), the two-way helical extruding drill bit rotates at a speed of 1 to 4 m/min promote.

The linkage type wall protection device for pile drilling rig of the present invention and the construction method using it are different from the prior art in that the present invention has the following advantages:

1. The interlocking wall protection device for piling drilling rigs in the present invention is based on the two-way helical extruding and expanding drilling tools, and a guide cylinder and a centering bracket are added to the drill rods, and the drill rods and drilling tools are strengthened during the drilling process of the drilling rig. After the casing is put on the drill pipe, because the guide cylinder and the centering bracket respectively support the casing at the upper and lower positions in the casing, the casing will not swing from side to side and has a higher verticality . The guide cylinder also has a guiding function. During the upward lifting of the protective cylinder, the protective cylinder can move upwards along the guide cylinder and smoothly realize the engagement of its upper end teeth and the lower end teeth of the power transmission cylinder.

2. The construction method of utilizing the interlocking type retaining device for pile drilling rigs in the present invention is based on the original two-way spiral extruded soil pouring pile construction method, and increases the technology of implementing the steel casing, thereby solving the problem in the pile foundation engineering. For the disadvantage of requiring a large number of cut piles under the condition of deep foundation pit, the purpose of efficiently utilizing resources and effectively reducing costs is achieved.

3. The construction method of the present invention using the interlocking wall protection device for pile drilling rigs is based on the original two-way spiral soil squeezed cast-in-situ pile construction method, and the rigid wall protection function of the steel casing is added to effectively prevent the hole wall from collapsing. At the same time, during the construction process of implanting steel cages, steel tendons or section steel, it can prevent the pile holes from collapsing and bring soil into the holes to ensure the quality of piles.

The interlocking wall protection device for pile drilling rig in the present invention utilizes the power head of the pile drilling rig, and two sets of movable pulleys are installed on it to act as the hoisting and lifting device of the steel casing, without configuring other lifting equipment, so that the power head can be fully utilized. Multiple functions are provided, the construction is convenient and fast, and the utilization rate of resources is improved.

The present invention will be further described below in conjunction with accompanying drawing.

Description of drawings

Fig. 1 is the state diagram after the power transmission cylinder, the guide cylinder and the centering support of the interlocking type wall protection device of the pile drilling rig in the present invention are installed on the drill rod;

Fig. 2 is the structural diagram of the casing and the drawing casing device of the linkage type wall protection device for pile drilling rig in the present invention;

Fig. 3 is the single lobe front view of the power transmission cylinder of the interlocking type wall protection device for pile drilling rig in the present invention;

Fig. 4 is the single lobe perspective view of the power transmission cylinder of the interlocking wall retaining device for pile drilling rig in the present invention;

Fig. 5 is the single lobe front view of the guide cylinder of the linkage type wall protection device for pile drilling rig in the present invention;

Fig. 6 is the single lobe perspective view of the guide cylinder of the linkage type wall protection device for pile drilling rig in the present invention;

Fig. 7 is a construction flow chart of the construction method using the interlocking wall protection device for piling drilling rigs in the present invention.

detailed description

The present invention is an improved invention made on the basis of the existing "two-way spiral extruded and expanded pile construction method and two-way helical closed extruded and expanded drill bit". For the content, please refer to the invention patent of "Construction Method of Two-way Spiral Extrusion and Expansion Pile and Two-way Helical Closed Extrusion and Expansion Drill Bit" applied by China Jingye Engineering Technology Co., Ltd. on February 15, 2007. The patent number is ZL200710063983.3, and the date of authorization announcement is December 16, 2009. This embodiment only elaborates on the improved part. As for the device in the prior art attached to the improved part and the existing construction method involved, please refer to the above-mentioned "two-way spiral extruded pile construction method and two-way helical closed extruded drill bit." "Patent.

As shown in Figure 1, and referring to Figure 2, the interlocking wall protection device for pile drilling rig in the present invention includes a force transmission cylinder 1, a guide cylinder 2, a centering bracket 3, a casing 4, and a casing pulling device 5 And the lifting device, the force transmission cylinder 1, the guide cylinder 2 and the centering bracket 3 are fixed on the drill pipe 6 of the pile drilling rig from top to bottom, and the force transmission cylinder 1 and the guide cylinder 2 are located under the power head 7 of the pile drilling rig. On the first drill rod, the centering bracket 3 is located at the middle and lower part of the drill rod 6 . The pulling casing device 5 is an open-close structure, which can clamp the casing 4 when it is closed, and loosen the casing 4 when it is opened. The casing 4 is set outside the drill pipe 6 and the inner diameter of the casing 4 is larger than the drill pipe. 6. The outer diameter of the lower end drill bit 8, the drill bit 8 is a two-way helical extrusion drill bit in the prior art, the outer diameters of the guide cylinder 2 and the centering bracket 3 are all less than the inner diameter of the casing 4, and the lower end surface of the force transmission cylinder 1 is set There are lower end teeth 101, and the upper end surface of the casing 4 is provided with an upper end tooth 401 that can engage with the lower end teeth 101. The casing 4 is clamped in the pulling casing device 5, and the lifting device drives the pulling casing device 5 to rise or decline.

Drawing casing device 5 comprises a clamping plate, and clamping plate is made up of two steel plates, and every steel plate is all provided with semicircle gap, and two semicircle gaps are arranged symmetrically, and every steel plate is all connected with a hydraulic pump (not shown in the figure). As shown), two hydraulic pumps symmetrically control the card board to open or close at the same time. When the card board is closed, the two semicircular notches form a full circle notch.

The lifting device includes upper and lower fixed pulley blocks 9, 10 and steel wire ropes. The upper fixed pulley block 9 is installed on the pile drilling rig power head 7, the lower fixed pulley block 10 is installed on the drawing casing device 5, and the upper and lower fixed pulley blocks 9 and 10 are sleeved. There is a wire rope.

The centering bracket 3 includes a steel ring, which is welded on the outer wall of the drilling rod 6 through a steel plate, and the drilling rod 6 is located at the center of the ring, and the diameter of the steel ring is slightly smaller than the inner diameter of the casing 4 .

The outer wall of the upper end of the casing 4 is provided with a card platform 402, the card platform 402 is located below the upper end tooth 401, the height of the card platform 402 is 10 cm, and the outer diameter of the card platform 402 is 4-5 cm larger than the outer diameter of the casing 4. The effect of the design card table 402 is to facilitate the pulling of the clamping plate in the casing device 5 to hold the casing 4. When the clamping plate clamps the position below the card table 402 of the casing 4 to lift the casing 4, the casing 4 will not Easily slips off the cardboard.

As shown in Figures 3, 4, 5, and 6, the force transmission cylinder 1 and the guide cylinder 2 are symmetrical double-lobed structures, and the double petals are connected by bolts and wrapped on the outer wall of the drill pipe 6 and fixed with the drill pipe 6. The inner diameter of the double-lobe structure of the force transmission cylinder 1 and the guide cylinder 2 is the same as the outer diameter of the drill rod 6, and the outer diameter of the double-lobe structure of the guide cylinder 2 is slightly smaller than the inner diameter of the casing 4. The method of fixing the power transmission cylinder 1 on the outer wall of the drill pipe 6 is as follows: the inner wall of the lower end of the power transmission cylinder 1 is provided with a groove, which can be engaged with the protruding pin on the drill pipe 6. After the engagement, the power transmission cylinder 1 is fixed on the On the outer wall of drill pipe 6. The guide cylinder 2 is fixed on the outer wall of the drill rod 6 by bolts.

The lower end teeth 101 of the force transmission cylinder 1 are flat steel teeth evenly distributed along the lower end surface of the force transmission cylinder 1 with a pitch greater than the tooth width, and the upper end teeth 401 of the casing 4 are also uniformly distributed along the upper end surface of the casing 4 with a pitch greater than The wide flat steel teeth are arranged in this way to make the upper and lower end teeth 401, 101 easy to bite and separate, and the casing 4 is a steel casing.

The lower end of the guide cylinder 2 is in the shape of an inverted cone, so that when the casing 4 passes through the drill pipe 6 and is lifted up and passes through the guide cylinder 2, the lower end of the guide cylinder 2 enters the casing 4 more easily, and the guiding effect on the casing 4 is better. it is good.

As shown in Figure 7, the construction method using the interlocking type wall protection device for pile drilling rig in the present invention comprises the following steps,

1) Equipment assembly: Install the force transmission cylinder 1, the guide cylinder 2 and the centering bracket 3 sequentially from top to bottom on the drill pipe 6 of the pile drilling rig, and put them through the two-way helical extruding and expanding drill bit to lift and pull the casing device 5, and the pile The drilling rig is put in place according to the known method, the concrete pump is prepared, and the cast-in-situ pile is prepared. The pile material is any one of concrete pile material, cement fly ash gravel pile material, tailings mortar pile material or cement steel slag pile material. kind;

2) The drilling rig is spinning to form a hole and the steel casing is screwed in: After the pile drilling rig is in place, start the drilling rig, and use the two-way spiral extruding and expanding drill bit to perform down-spinning and expanding to form a hole. After the pile hole is extruded to a certain depth, the steel casing The steel teeth at the upper end of the cylinder engage with the steel teeth at the lower end of the power transmission cylinder 1, and the lower end of the steel casing reaches the orifice. The clamping plate of the pulling casing device 5 is opened, and the steel casing is released to ensure that the pulling casing device 5 does not affect the steel casing. The barrel rotates freely and plays a role of righting. Continue to apply clockwise torque and downward pressure to make the steel casing rotate into the hole in conjunction. When the upper part of the steel casing and the pulling casing device 5 reach the vicinity of the ground, the Stop drilling and separate the steel teeth at the upper end of the steel casing from the steel teeth at the lower end of the power transmission cylinder 1;

3) Drill bit upscrewing and concrete pouring: start the piling rig to apply clockwise torque and pulling force, so that the two-way helical extruding drill bit rotates upward and then rotates again to extrude the upper pile hole. While lifting, start the concrete pump to pour concrete into the pile hole that has been squeezed and expanded. Through the pressure squeeze and expansion of the concrete, the pile diameter of the completed concrete pile section meets the design requirements. The filling process will continue until the design elevation of the pile top, after which the two-way helical extruding drill bit will be hoisted out of the steel casing;

4) Implantation of reinforcement cages, reinforcement bundles or section steel: use the drilling rig pile frame and auxiliary hoist to lift and implant reinforcement cages, reinforcement bundles or section steel. When the reinforcement cage, reinforcement bundle or section steel cannot sink under its own weight, use The vibratory hammer implants the reinforcement cage, tendon or section steel into the pile body, and the implantation depth must meet the design requirements;

5) Pulling out the steel casing: After the above-mentioned procedures are completed, use the power of the drilling rig power head 7 and the pulling casing device 5 to clamp the upper part of the steel casing to pull out the steel casing, and the foundation pile construction is completed so far.

In the construction method using the linkage type wall protection device for pile drilling rig in the present invention, in the step 1), the force transmission cylinder 1 and the guide cylinder 2 are all installed on the first drill rod under the power head 7 of the pile drilling rig , the centering support 3 is installed on the middle and lower part of the drill pipe 6, and the depth of the hole formed by the initial drilling rig is about the length of the steel casing or the depth of the foundation pit. Rotate at low speed to form a hole. When the top of the steel casing reaches the specified elevation, and the two-way helical extrusion drill rotates to drill and expand the hole to the design depth, the drilling can be stopped. In the step 3), the two-way helical extrusion drill bit is 1 to 4 meters /min speed spin boost.

In the present invention, in order to obtain a better construction effect, the inner diameter of the steel casing is slightly larger than the design diameter of the foundation pile.

Figure 7a shows the piling drilling rig and concrete pump equipment equipped with force transmission cylinder, guide cylinder, centering bracket, drawing casing device and bidirectional helical extrusion and expansion drill; ; Figure 7c shows that the steel casing starts to be screwed into the pile hole; Figure 7d shows that the pile hole reaches the design depth and the steel casing reaches the preset embedding depth; Pressure poured concrete; Figure 7f shows that the pressure poured concrete has been completed, and the upper surface of the concrete in the pile hole has reached the design height; Figure 7g shows that the two-way spiral squeezed soil pouring pile is inserted, pressed or vibrated into a reinforcement cage, tendon or section steel; Figure 7 7h represents the completion of the reinforcement cage, tendon or section steel implantation; Fig. 7i represents the drawing out of the steel casing.

The applicable strata of the construction method of the interlocking type wall protection device using the piling drilling rig in the present invention are wide, including backfill, sandy soil, silt, soft clay, silty clay, clay, loess, gravel soil and full and strong weathered soil layers etc. It has strong applicability to the construction of two-way spiral squeezed cast-in-place piles in the soft clay stratum in the coastal and lake areas, and is also suitable for high water level strata.

The construction method using the interlocking wall protection device for piling drilling rigs in the present invention is particularly suitable for engineering projects that carry out pile foundation construction first and then excavate deep foundation pits. Therefore, it has strong practicability for construction projects containing basements .

The above-mentioned embodiments are only descriptions of preferred implementations of the present invention, and are not intended to limit the scope of the present invention. Variations and improvements should fall within the scope of protection defined by the claims of the present invention.

Claims (10)

1. a pile work drilling machine coordinated type breast wall apparatus, is characterized in that: comprise power transmission cylinder (1), guide cylinder (2), centeringSupport (3), casing (4), drawing casing device (5) and lowering or hoisting gear, described power transmission cylinder (1), guide cylinder (2) and rightMedium-height trestle (3) is from top to bottom fixed on the drilling rod (6) of pile work drilling machine successively, and described drawing casing device (5) is an enclosedStructure can clamp casing (4) in the time that it is closed, can unclamp casing (4) in the time opening, and described casing (4) is sleeved on brillBar (6) internal diameter outer and casing (4) is greater than the external diameter of drilling rod (6) lower end drill bit (8), described guide cylinder (2) and centeringThe external diameter of support (3) is all less than the internal diameter of casing (4), and the lower surface of described power transmission cylinder (1) is provided with lower end tooth (101), instituteThe upper surface of stating casing (4) be provided with can with lower end tooth (101) the upper end tooth (401) of interlock mutually, casing (4) clampingIn drawing casing device (5), described lowering or hoisting gear drives drawing casing device (5) to rise or declines.

2. pile work drilling machine according to claim 1 coordinated type breast wall apparatus, is characterized in that: described drawing casing device(5) comprise a clamp, described clamp is made up of two block plates, is all provided with a half round cut on every block plate, two half round cutBe symmetrical arranged, be all connected with a hydraulic pump on every block plate, two hydraulic pumps are controlled symmetrically that clamp opens simultaneously or are closed,In the time that clamp is closed, two half round cut form a full circle breach.

3. pile work drilling machine according to claim 1 and 2 coordinated type breast wall apparatus, is characterized in that: described lowering or hoisting gearComprise upper and lower fixed pulley group (9,10) and steel wire rope, described upper fixed pulley group (9) is arranged on pile work drilling machine unit head (7)Upper, it is upper that described lower fixed pulley group (10) is arranged on drawing casing device (5), between described upper and lower fixed pulley group (9,10)Be arranged with described steel wire rope.

4. pile work drilling machine according to claim 3 coordinated type breast wall apparatus, is characterized in that: described to medium-height trestle (3)Comprise a steel annulus, described steel annulus is welded on drilling rod (6) outer wall, and drilling rod (6) is positioned at circle ring center.

5. pile work drilling machine according to claim 4 coordinated type breast wall apparatus, is characterized in that: described casing (4)Upper end outer wall is provided with Yi Katai (402), and described Ka Tai (402) is positioned at end tooth (401) below.

6. pile work drilling machine according to claim 5 coordinated type breast wall apparatus, is characterized in that: described power transmission cylinder (1)Be symmetric double valve structure with guide cylinder (2), after bivalve is with bolts, be wrapped on the outer wall of drilling rod (6) and and drilling rod(6) fix.

7. pile work drilling machine according to claim 6 coordinated type breast wall apparatus, is characterized in that: described power transmission cylinder (1)Lower end tooth (101) for being uniformly distributed along power transmission cylinder (1) lower surface and tooth pitch is greater than the flat steel-tooth of the facewidth, described casing (4)Upper end tooth (401) also for being uniformly distributed along casing (4) upper surface and tooth pitch is greater than the flat steel-tooth of the facewidth, described casing (4)For steel casing.

8. pile work drilling machine according to claim 7 coordinated type breast wall apparatus, is characterized in that: described guide cylinder (2)Lower end be back taper.

9. right to use requires the construction method of the pile work drilling machine coordinated type breast wall apparatus described in 8, it is characterized in that: comprise withLower step,

1) device assembles: on the drilling rod (6) of pile work drilling machine, install successively from top to bottom power transmission cylinder (1), guide cylinder (2) andTo medium-height trestle (3), overlapped bidirectional helix extruding enlarging aiguille lifting drawing casing device (5), pile work drilling machine is according to known method justPosition, is ready to concrete pump, and preparation perfusion piling, and piling is concrete piling or CFG material or CHARACTERISTICS OF TAILINGS SANDAny one in slurry piling or cement steel slag piling;

2) rig spinning pore-forming and steel casing screw in: after pile work drilling machine is in place, start rig, utilize bidirectional helix extruding enlarging aiguille to enterRow lower spiral expanded finished hole, until pile hole extruding-extending after certain depth, steel casing upper end steel-tooth and power transmission cylinder (1) lower end steel-tooth interlock,Aperture is arrived in steel casing lower end, and drawing casing device (5) clamp opens, and decontrols steel casing, ensures drawing casing device (5)Do not affect steel casing and rotate freely and play centralizing function, continue to apply clockwise moment of torsion and downforce, make steel casing connectionMoving rotation hand-hole, in the time of steel casing position suitable for reading and drawing casing device (5) arrival Near Ground, can stop to bore, by steel casingUpper end steel-tooth separates with power transmission cylinder lower end steel-tooth;

3) on drill bit, revolve and promote and guncreting: start pile work drilling machine and apply clockwise moment of torsion and lift power, make two-wayHelix extruding-enlarging bit is up and again rotate stake hole, squeezed top, in revolving lifting, opens on bidirectional helix extruding enlarging aiguilleMoving concrete pump, carries out the filling of coagulation soil pressure to completing squeezed stake hole, squeezed by concrete pressure, makes to complete coagulationThe expanded diameter that soil pressure is filled with pile cutoff meets designing requirement, till this hole coagulation soil pressure process of filling with will last till design of pile top absolute altitude,Afterwards bidirectional helix extruding enlarging aiguille is hung out from steel casing;

4) implanted reinforced bar cage, tendon or shaped steel: utilize rig pile frame and secondary hoist engine to implement steel reinforcement cage, tendon or shaped steelLifting and implantation, in the time that steel reinforcement cage, tendon or shaped steel cannot sink under deadweight, utilize vibration hammer by steel reinforcement cage, tendonOr shaped steel implantation pile body, implantation depth must meet designing requirement;

5) extract steel casing: after above-mentioned each operation completes, utilize power and the drawing casing device (5) of drill power head (7)Block steel casing position suitable for reading steel casing is extracted, so far complete foundation pile construction.

10. construction method according to claim 9, is characterized in that: described step 1) in, power transmission cylinder (1) with leadAll be arranged on first drilling rod under pile work drilling machine unit head (7) to cylinder (2), medium-height trestle (3) is arranged on to drilling rod (6)Middle and lower part, initial rig depth of pore forming is about steel casing length or foundation depth, described step 2) in bidirectional helix extruding counterboringHead, with the rotating speed backspin pore-forming of 4 to 14 revs/min, is specified absolute altitude when steel casing top arrives, and bidirectional helix extruding-enlarging bitBore and expand pore-forming to projected depth and can stop to bore, described step 3) in bidirectional helix extruding enlarging aiguille with the speed rotation of 1 to 4 m/minPromote.