CN216841420U

CN216841420U - Combined drill bit of hydraulic down-the-hole hammer secant pile

Info

Publication number: CN216841420U
Application number: CN202122742118.XU
Authority: CN
Inventors: 陶德明
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-11-10
Filing date: 2021-11-10
Publication date: 2022-06-28
Anticipated expiration: 2031-11-10

Abstract

The utility model discloses a hydraulic down-the-hole hammer secant pile combined drill bit.A gear box input end is connected with a drill rod on a ground drilling machine, and a gear box output end is downwards connected with a combined hydraulic impact hammer pile driving drill bit through an intermediate structure; two or more groups of combined hydraulic impact hammer pile driving drill bits are arranged on the lower side of the gear box along a straight line, the gear box drives the combined hydraulic impact hammer pile driving drill bits to rotate, the interiors of the combined hydraulic impact hammer pile driving drill bits are impacted, and the combined hydraulic impact hammer pile driving drill bits drill in a rotary impact mode. Several groups of straight lines of combined hydraulic hammer impact and rotary drill bits in the crushing mode of the device are arranged, the sectional area of single construction is greatly increased, the construction efficiency is greatly improved, the construction cost is reduced, and meanwhile the construction quality can be better guaranteed. The device for constructing the occlusive piles can completely replace the conventional double-wheel milling equipment for constructing the continuous wall.

Description

Combined drill bit of hydraulic down-the-hole hammer secant pile

Technical Field

The utility model belongs to mechanical equipment for secant pile construction in foundation pit supporting engineering in the field of rock and soil, and relates to tunneling machinery capable of quickly and efficiently crushing hard rock strata such as a rock karst cave stratum, a rock stratum and the like.

Background

With the acceleration of footsteps of urban construction in China, the orderly planning and utilization of urban underground spaces are more and more mature, and the underground spaces can not be developed without foundation pit support in geotechnical engineering, so that the driving protection and navigation for underground space construction are realized. With the requirement of urban development, the depth of the underground space is from a few meters in the past to 20-30 meters at present, and can reach 100 meters in the future, so that simple construction methods and construction equipment of a plurality of water-stop retaining walls in the past cannot keep up with the steps of the times, and the development requirements of the times are met. For example: the prior occlusive pile construction method and equipment for the water-stop retaining wall are difficult to meet the instant construction requirements. In the past, due to the limitation of equipment, two independent plain concrete piles which are not placed in a reinforcement cage are driven at intervals in the process of constructing the secant pile, and then a concrete pile placed in the reinforcement cage is driven into the middle of the two plain concrete piles. When the middle pile is driven, the concrete pile body without the reinforcement cage on the two sides is cut into a certain depth. The construction process has the following problems that 1, in the construction process, due to the change of geological conditions, two previously-driven plain concrete piles are difficult to ensure to construct the same vertical plane with the middle steel reinforcement cage concrete pile, so that the middle pile cannot be ensured to be meshed with the two side piles. 2. Because the plain concrete piles which are firstly driven are not provided with the steel reinforcement cage to increase the toughness of the pile body, when the concrete piles of the middle steel reinforcement cage are driven, the plain concrete piles at two sides are easily extruded and broken during occlusion, and the enclosure capacity and the water sealing effect of the continuous occluded pile wall formed after pile breaking are seriously reduced. 3. When drilling in a hard rock stratum, because the construction efficiency is extremely low, the single pile forming time cannot be guaranteed, the hardening time of concrete cannot be controlled, and finally the secant pile surface fails.

Another construction method capable of achieving the effect of water stopping and wall protection is called a continuous wall construction method. When the construction method meets hard rock stratums and karst cave stratums, hydraulic double-wheel milling equipment introduced abroad is generally adopted for construction. The equipment is particularly expensive firstly, and secondly, aiming at hard rock stratums, karst cave stratums and other stratums which are difficult to construct, the construction efficiency is extremely low, the construction cost is very high, and the equipment is very high in failure rate and high in maintenance cost.

The utility model adopts a plurality of independent rotary percussion drill bits, and the construction process is high-frequency impact and rotation, so the tunneling efficiency is extremely high. Through several groups of straight line arrangements of the drill bits, the sectional area of single construction is greatly increased, the construction efficiency is greatly improved, the construction cost is reduced, and meanwhile, the construction quality can be better guaranteed.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide construction equipment for an underground occluded fender post, which has stable construction quality and high construction efficiency.

The utility model adopts the technical scheme that a plurality of groups of drill bits are driven to independently rotate or simultaneously rotate through a gear box, rock is simultaneously struck through the rotation of a single drill bit to realize the rotary impact crushing, and meanwhile, crushed rock debris, broken stone and the like are discharged out of the bottom of a hole in a reverse circulation mode through a hollow drill rod connected with a ground drilling machine. Several groups of high-frequency impact crushing drill bits are arranged in a straight line, so that the sectional area of single construction is increased, the construction efficiency is greatly improved, the construction cost is reduced, and meanwhile, the construction quality can be better guaranteed due to the characteristics of a mechanical structure.

The technical scheme adopted by the utility model is as follows: the hydraulic down-the-hole hammer secant pile combined drill bit is characterized in that the input end of a gear box 4 is connected with a drill rod 1 on a ground drilling machine, and the output end of the gear box 4 is downwards connected with a combined hydraulic impact hammer piling drill bit 14 through an intermediate structure; two or more groups of combined hydraulic impact hammer piling drill bits 14 are arranged at the lower side of the gear box 4 along a straight line, the gear box 4 drives the combined hydraulic impact hammer piling drill bits 14 to rotate, meanwhile, the combined hydraulic impact hammer piling drill bits 14 carry out impact in the interior, and the combined hydraulic impact hammer piling drill bits 14 perform drilling work in a rotary impact mode. The multi-group combined hydraulic impact hammer pile driving drill bit 14 can work simultaneously to increase the single construction sectional area, so that the occlusion degree between the formed piles is better.

In the intermediate structure, a transmission shaft 5 at the output end of a gear box 4 outputs torque, the transmission shaft 5 is connected with an oil collector 11, and the oil collector 11 is fixed on a protective cylinder 12; the casing 12 is connected with a combined hydraulic impact hammer pile driving bit 14, and the torque of the gear box 4 is transmitted to the combined hydraulic impact hammer pile driving bit 14. A central rotary joint inner ring 82 of the central rotary joint 8 is fixed on the transmission shaft 5, a central rotary joint outer ring 81 of the central rotary joint 8 is connected with the brake pipe 6, the brake pipe 6 is connected with the gear box 4, and when the transmission shaft 5 rotates, the central rotary joint inner ring 82 rotates along with the transmission shaft 5 as being fixed on the transmission shaft 5; and the gear box 4 is fixed relative to the transmission shaft 5, so that the brake pipe 6 connected below and the outer ring 81 of the central rotary joint connected with the brake pipe 6 are not rotated relative to the transmission shaft 5, and finally, when the combined hydraulic hammer pile driving bit 14 rotates, the hydraulic oil pipe or air pipe pipeline inside can continuously rotate, while the hydraulic oil pipe or air pipe pipeline connected to the outer ring 81 of the central rotary joint is not rotated. (if the hydraulic oil pipe or the air pipe on the outer ring of the central rotary joint rotates, the hydraulic oil pipe or the air pipe is formed to be wound around the drill rod, so that the hydraulic oil pipe or the air pipe is damaged and even broken.) in order to protect the hydraulic oil pipe or the air pipe, a pipe protecting barrel 9 is added between the protecting barrel 12 and the central rotary joint 8, and the pipe protecting barrel 9 is fixed on the protecting barrel 12 and rotates along with the protecting barrel 12.

Further, the first hydraulic pipeline 7 is connected to a pump station on the ground upwards and connected with the outer ring 81 of the central swivel joint downwards; the second hydraulic line 10 is connected up to the inner ring 82 of the central swivel joint and down to the oil collector 11, which is also connected to the hydraulic percussion hammer or pneumatic down-the-hole hammer in the pile bit 14 of the combination hydraulic percussion hammer, so that the working hydraulic oil or air is delivered to the hydraulic percussion hammer or pneumatic down-the-hole hammer for its operation.

The hydraulic impact hammer or the pneumatic down-the-hole hammer breaks the debris of the rock and discharges the debris out of the hole bottom in a pumping reverse circulation mode. Namely: the lower water suction pipe 13 is arranged in the pile driving drill bit 14 of the combined hydraulic impact hammer, and the lower water suction pipe 13 is connected to the bottom of the hole downwards and is connected to the oil collector 11 upwards; the oil collector 11 is connected with the transmission shaft 5, the transmission shaft 5 is connected with the upper suction pipe 2, the upper suction pipe 2 is connected with the drill rod 1, and the drill rod 1 is connected with the pump suction reverse circulation pump on the ground so as to discharge rock debris at the bottom of the hole to the ground.

Further, the first hydraulic line 7 and the second hydraulic line 10 may be pneumatic lines.

Further, two or more groups of the combined hydraulic impact hammer pile driving drill bits 14 are arranged in a straight line at the lower side of the gear box 4, and the gear box 4 drives the combined hydraulic impact hammer pile driving drill bits 14 to rotate.

Further, the pile driving bits 14 of the combined hydraulic impact hammers are arranged in a straight line or in a curve.

Further, the drill rod 1 is connected with the gear box 4 and drives the gears in the gear box 4 to rotate, and meanwhile, the gear box 4 drives the multiple groups of combined hydraulic impact hammer pile driving drill bits 14 to rotate simultaneously.

Furthermore, several groups of combined hydraulic impact hammer pile driving drill bits 14 rotate simultaneously, and the driving mode is that one driving device 3 drives several combined hydraulic impact hammer pile driving drill bits; or one driving device 3 drives a pile driving drill bit of the combined hydraulic impact hammer, and a plurality of groups of driving devices synchronously output torque, so that the purpose of simultaneously rotating the pile driving drill bit of the combined hydraulic impact hammer is achieved. The drive device 3 is a rotary drive device.

Further, two or more groups of combined hydraulic impact hammer pile driving drill bits 14 are arranged at the lower side of the gear box 4 in a straight line, and in order to ensure that the two groups of combined hydraulic impact hammer pile driving drill bits are fully meshed, a hydraulic impact unit is arranged at the position of the middle arc angle of the two groups of combined hydraulic impact hammer pile driving drill bits 14, and the rock body at the position of the arc angle, which is not drilled by the combined hydraulic impact hammer pile driving drill bits 14, is broken.

The combination hydraulic hammer pile driving bit 14 includes multiple sets of hydraulic hammer units. The hydraulic impact hammer unit comprises main components such as a hydraulic impact hammer, a guide sleeve, a hammer plate, a positioning block and the like. The hydraulic impact hammer unit is used for applying impact energy to the rock through the hydraulic impact hammer to achieve the purpose of impacting and breaking the rock. The specific structure can be seen in Chinese patent 201510070655.0.

Further, the gearbox 4 drives the combined hydraulic hammer piling drill bit 14 to rotate, the combined hydraulic hammer piling drill bit 14 rotates independently, or several groups of combined hydraulic hammer piling drill bits 14 rotate simultaneously.

Further, the combined hydraulic impact hammer pile driving bit 14 is a hydraulic impact hammer or a pneumatic impact hammer.

The utility model has the advantages that a plurality of independent combined hydraulic impact hammer drill bits are linearly arranged, the combined hydraulic impact hammer drill bits are driven by the gear box to independently rotate or simultaneously rotate, and impact units in the combined hydraulic impact hammer drill bits can be combined to strike rocks to realize rotation and impact crushing while the combined hydraulic impact hammer drill bits rotate. The efficient combined hydraulic impact hammer drill bits in the crushing form are arranged in a plurality of groups of straight lines, the sectional area of single construction is greatly increased, the construction efficiency is greatly improved, the construction cost is reduced, meanwhile, one-step construction forming is realized, the verticality and the engagement degree between piles are ensured, and the construction quality can be remarkably improved.

Drawings

Fig. 1 is a general view of a bite pile constructing apparatus.

Fig. 2 is a construction sectional view of the bite pile constructing apparatus.

Fig. 3 is a connection diagram of a central swivel joint of the bite pile constructing apparatus.

Fig. 4 is a whole rotation construction.

Fig. 5 is a hydraulic impact hammer layout diagram.

In the figure: 1. the hydraulic driving device comprises a drill rod, 2, an upper suction pipe, 3, a driving device, 4, a gear box, 5, a transmission shaft, 6, a brake pipe, 7, a first hydraulic pipeline, 8, a central rotary joint, 9, a pipe protecting cylinder, 10, a second hydraulic pipeline, 11, an oil collector, 12, a pipe protecting cylinder, 13, a lower suction pipe, 14, a combined hydraulic hammer impact hammer pile driving drill bit, 81, a central rotary joint outer ring, 82 and a central rotary joint inner ring.

Detailed Description

The present invention will be described in further detail with reference to the following drawings and examples.

The technical scheme adopted by the utility model is a novel secant pile construction device, a gear box is fixed with a drill rod on a ground drilling machine, and a combined hydraulic impact hammer pile driving drill bit is downwards connected through an intermediate structure; 2 groups or more than 2 groups of piling drill bits of the combined hydraulic impact hammer are linearly arranged at the lower side of the gear box, the gear box drives the piling drill bits of the combined hydraulic impact hammer to rotate, and meanwhile, the piling drill bits of the combined hydraulic impact hammer are internally impacted, so that a rotary impact working mode is formed. And several groups of combined hydraulic impact hammer pile driving drill bits work simultaneously, so that the single construction sectional area is increased, and the engagement degree between piles is better.

The lower end of the gear box outputs torque through a transmission shaft, the lower end of the transmission shaft is connected with an oil collector, and the oil collector is fixed on the protective cylinder; the pile casing is connected with the pile driving drill bit of the combined hydraulic impact hammer, so that the torque of the gear box is transmitted to the pile driving drill bit of the combined hydraulic impact hammer. When the transmission shaft rotates, the inner ring of the central rotary joint rotates together as the inner ring of the central rotary joint is fixed on the transmission shaft; and the gear box is immobile relative to the transmission shaft, so that the outer ring of the central rotary joint connected with the brake pipe and the brake pipe does not rotate relative to the transmission shaft, and finally, when the combined hydraulic impact hammer piling drill bit rotates, the hydraulic oil pipe or the air pipe pipeline inside the combined hydraulic impact hammer piling drill bit can continuously rotate, while the hydraulic oil pipe or the air pipe pipeline connected to the outer ring of the central rotary joint does not rotate. (if the hydraulic oil pipe or the air pipe pipeline on the outer ring of the central rotary joint rotates, the hydraulic oil pipe or the air pipe pipeline is formed to be wound around the drill rod, so that the hydraulic oil pipe or the air pipe pipeline is damaged and even torn off.) in order to protect the hydraulic oil pipe or the air pipe pipeline, a pipe protecting barrel is directly added on the protecting barrel and the central rotary joint, and is fixed on the protecting barrel and rotates along with the protecting barrel.

The 2 groups or more than 2 groups of piling drill bits of the combined hydraulic impact hammer are linearly arranged at the lower side of the gear box, and the gear box drives the piling drill bits of the combined hydraulic impact hammer to rotate.

The piling drill bits of the combined hydraulic impact hammer can be arranged linearly or in a curve.

The drill rod connected to the power head of the ground drilling machine transmits torque to the gear box, the drill rod drives the gears in the gear box to rotate, and meanwhile, the gear box drives the multiple groups of combined hydraulic impact hammer pile driving drill bits to rotate simultaneously.

The piling drill bits of the combined hydraulic impact hammers rotate simultaneously, and the driving mode can be that one driving device drives the piling drill bits of the combined hydraulic impact hammers; or a driving device can drive a pile driving drill bit of the combined hydraulic impact hammer; several groups of driving devices synchronously output torque, and the purpose of simultaneously rotating the piling drill bit of the combined hydraulic impact hammer can be achieved.

2 groups or more than 2 groups of combined hydraulic impact hammer pile driving drill bits are arranged on the lower side of the gear box in a straight line, in order to ensure that the 2 groups of combined hydraulic impact hammer pile driving drill bits are fully meshed, a hydraulic impact unit is arranged at the position of the middle arc angle of the 2 groups of combined hydraulic impact hammer pile driving drill bits, and the rock body at the position of the arc angle, which is not drilled by the combined hydraulic impact hammer pile driving drill bits, is broken.

The gearbox drives the combined hydraulic impact hammer piling drill bit to rotate, and the combined hydraulic impact hammer piling drill bit can rotate independently or simultaneously rotate a plurality of groups of combined hydraulic impact hammer piling drill bits.

The pile driving drill bit of the combined hydraulic impact hammer can be formed by combining a hydraulic impact hammer and can also be formed by combining a pneumatic impact hammer.

1-4, in operation, the drill rod drives the gear box to slowly move downwards, the driving device on the gear box is started, and the torque output by the gear box is transmitted to the piling drill bit of the combined hydraulic impact hammer through the transmission shaft, the oil collector and the protective cylinder, so that the piling drill bit of the combined hydraulic impact hammer rotates; meanwhile, the ground power station transmits working hydraulic oil to a plurality of hydraulic impact hammers in the pile driving drill bit of the combined hydraulic impact hammer at the bottom of the hole through a hydraulic pipeline on the drilling machine, so that the hydraulic impact hammers are impacted at high frequency. Finally, the effect of the combination hydraulic impact hammer pile driving drill bit rotating and simultaneously striking the impact unit is formed, and a mode of cutting and striking the crushed rock is formed. The gearbox drives several groups of combined hydraulic impact hammer pile driving drill bits to work simultaneously, and the pile cross section formed in the way is shown in figure 2. The above is a driving method of the present invention, that is: a pile driving drill bit of a combined hydraulic impact hammer corresponds to a driving device, and the pile driving drill bit of the combined hydraulic impact hammer can work independently or simultaneously work in a plurality of groups.

The other driving method comprises the following steps: the number of the driving devices is only 1, and the driving devices are used for driving a plurality of groups of combined hydraulic impact hammer piling drill bits simultaneously through the gear box, and the method combines the hydraulic impact hammer piling drill bits to work simultaneously.

The other driving method comprises the following steps: the drill rod provides power, torque is transmitted to the piling drill bits of the combined hydraulic impact hammers through the gear box, and the piling drill bits of the combined hydraulic impact hammers can also rotate simultaneously.

Claims

1. The utility model provides a hydraulic pressure down-the-hole hammer secant pile combination drill bit which characterized in that: the input end of the gear box (4) is connected with a drill rod (1) on a ground drilling machine, and the output end of the gear box (4) is downwards connected with a pile driving drill bit (14) of the combined hydraulic impact hammer through an intermediate structure; two or more groups of combined hydraulic impact hammer piling drill bits (14) are arranged at the lower side of the gear box (4) along a straight line, the gear box (4) drives the combined hydraulic impact hammer piling drill bits (14) to rotate, the combined hydraulic impact hammer piling drill bits (14) carry impact internally, and the combined hydraulic impact hammer piling drill bits (14) drill in a rotary impact mode;

in the intermediate structure, a transmission shaft (5) at the output end of the gear box (4) outputs torque, the transmission shaft (5) is connected with an oil collector (11), and the oil collector (11) is fixed on the protective cylinder (12); the pile casing (12) is connected with a pile driving drill bit (14) of the combined hydraulic impact hammer, and the torque of the gear box (4) is transmitted to the pile driving drill bit (14) of the combined hydraulic impact hammer; a central rotary joint inner ring (82) of the central rotary joint (8) is fixed on the transmission shaft (5), a central rotary joint outer ring (81) of the central rotary joint (8) is connected with a brake pipe (6), and the brake pipe (6) is connected with the gear box (4); a pipe protecting barrel (9) is arranged between the protecting barrel (12) and the central rotary joint (8), and the pipe protecting barrel (9) is fixed on the protecting barrel (12).

2. A hydraulic down-the-hole hammer bite pile combination drill bit as recited in claim 1, further comprising: the first hydraulic pipeline (7) is upwards connected with a pump station on the ground and downwards connected with an outer ring (81) of the central swivel joint; the second hydraulic pipeline (10) is connected to the central rotary joint inner ring (82) upwards and is connected with the oil collector (11) downwards, and meanwhile, the oil collector (11) is connected with the hydraulic impact hammer in the combined hydraulic impact hammer piling drill bit (14).

3. A hydraulic down-the-hole hammer bite pile combination drill bit as recited in claim 1, further comprising: the lower water suction pipe (13) is arranged in the pile driving drill bit (14) of the combined hydraulic impact hammer, and the lower water suction pipe (13) is downwards connected to the bottom of the hole and upwards connected to the oil collector (11); the oil collector (11) is connected with the transmission shaft (5), the transmission shaft (5) is connected with the upper water suction pipe (2), the upper water suction pipe (2) is connected with the drill rod (1), and the drill rod (1) is connected with the pump suction reverse circulation pump on the ground.

4. A hydraulic down-the-hole hammer bite pile combination drill bit as recited in claim 2, further comprising: the first hydraulic line (7) and the second hydraulic line (10) can be pneumatic lines.

5. A hydraulic down-the-hole hammer bite pile combination drill bit as recited in claim 1, further comprising: two or more groups of combined hydraulic impact hammer piling drill bits (14) are arranged at the lower side of the gear box (4) along a straight line, and the gear box (4) drives the combined hydraulic impact hammer piling drill bits (14) to rotate.

6. The combination drill bit of the hydraulic down-the-hole hammer bite pile of claim 1, wherein: the piling drill bits (14) of each combined hydraulic impact hammer are arranged in a straight line or in a curve.

7. A hydraulic down-the-hole hammer bite pile combination drill bit as recited in claim 1, further comprising: the drill rod (1) is connected with the gear box (4) and drives the gears in the gear box (4) to rotate, and the gear box (4) drives the multiple groups of combined hydraulic impact hammer pile driving drill bits (14) to rotate simultaneously.

8. A hydraulic down-the-hole hammer bite pile combination drill bit as recited in claim 1, further comprising: two or more groups of combined hydraulic impact hammer pile driving drill bits (14) are linearly arranged at the lower side of the gear box (4), and a hydraulic impact unit is arranged at the position of a middle arc angle of the two groups of combined hydraulic impact hammer pile driving drill bits (14).

9. A hydraulic down-the-hole hammer bite pile combination drill bit as recited in claim 8, further comprising: the gearbox (4) drives the combined hydraulic impact hammer piling drill bit (14) to rotate, the combined hydraulic impact hammer piling drill bit (14) rotates independently, or the combined hydraulic impact hammer piling drill bits (14) rotate simultaneously.

10. The combination drill bit of the hydraulic down-the-hole hammer bite pile of claim 1, wherein: the combined hydraulic impact hammer pile driving drill bit (14) is a hydraulic impact hammer or a pneumatic impact hammer.