CN216999890U

CN216999890U - Drop hammer height adjusting device for pile foundation high strain detection

Info

Publication number: CN216999890U
Application number: CN202220646102.0U
Authority: CN
Inventors: 范雪峰; 胡旺春; 夏昕; 熊京
Original assignee: Jiangxi Hongjian Engineering Testing Co ltd
Current assignee: Jiangxi Hongjian Engineering Testing Co ltd
Priority date: 2022-03-23
Filing date: 2022-03-23
Publication date: 2022-07-19
Anticipated expiration: 2032-03-23

Abstract

The utility model discloses a drop hammer height adjusting device for pile foundation high strain detection, which comprises a base, wherein the top end of the base is fixedly connected with a support frame, a height adjusting mechanism is arranged on the support frame, the height adjusting mechanism comprises a handle, a threaded rod and a limiting block, the top ends of the two support frames are fixedly connected with an installation block, one end of the threaded rod is rotatably connected with the installation block, the other end of the threaded rod is rotatably connected with the base in an inserting manner, the bottom end of the threaded rod is fixedly connected with the handle, the limiting block is connected with the threaded rod in a threaded inserting manner, and the support frame is provided with scale marks. According to the utility model, the motor, the threaded rod and the limiting block are matched, the output end of the motor drives the threaded rod to rotate, so that the limiting block slides on the supporting frame, the height required by the heavy hammer can be set in advance through the scale marks on the supporting frame, the heavy hammer is directly lifted to the position below the limiting block, and the scale marks at the bottom end of the limiting block indicate the height of the heavy hammer and the height of the pile foundation.

Description

Drop hammer height adjusting device for pile foundation high strain detection

Technical Field

The utility model relates to the technical field of pile foundations, in particular to a drop hammer height adjusting device for pile foundation high strain detection.

Background

The high strain detection is a detection method for judging the vertical compression bearing capacity and the integrity of a pile body of a single pile, a heavy hammer is used for impacting the pile top in an experiment, the speed and force time-course curve of the pile top are measured in an actual way, and the speed and force time-course curve is analyzed through a fluctuation theory; the main detection methods include a waveform fitting method, a CAPWAPC method, a Keys method, a wave equation method and the like.

The basic principle of high strain detection is: the heavy hammer is used for impacting the pile top, so that sufficient relative displacement is generated between pile soils, in order to generate certain relative displacement between the pile soils, larger energy needs to be acted on the pile, the pile top is hammered by matching the heavy hammer with a certain drop distance, the existing heavy hammer during the high strain detection of the pile foundation is pulled up by a crane, the distance height between the heavy hammer and the pile foundation cannot be judged, the precision is poor, the operation is complex, and the construction quality is easily influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a drop hammer height adjusting device for pile foundation high strain detection, which solves the problems in the prior art.

In order to achieve the purpose, the utility model provides the following technical scheme: a drop hammer height adjusting device for pile foundation high strain detection comprises a base, wherein a supporting frame is fixedly connected to the top end of the base, a height adjusting mechanism is arranged on the supporting frame, and a drop hammer device is arranged on the base;

height adjusting mechanism is including handle, threaded rod and stopper, two the top fixedly connected with installation piece of support frame, the one end and the installation piece of threaded rod rotate to be connected, the other end and the base of threaded rod rotate to alternate and be connected, the bottom and the handle fixed connection of threaded rod, the stopper alternates with threaded rod screw thread to be connected, the stopper alternates with the support frame slip and is connected, be provided with the scale mark on the support frame.

Preferably, the hammer device that falls is including electric block, wire rope, guider, couple and weight, electric block fixed mounting is on the top of base, electric block's output transmission is connected with the capstan winch, wire rope's one end and couple fixed connection, wire rope's the other end and capstan winch winding are connected, guider fixed connection is in the top of support frame, wire rope and guider mutually support, the couple is connected with the top of weight.

Preferably, guider is including first deflector roll, second deflector roll and backup pad, backup pad fixed mounting is on the top of support frame, the one end and the first deflector roll of backup pad rotate to be connected, the other end and the second deflector roll of backup pad rotate to be connected, first deflector roll and second deflector roll all with wire rope sliding connection.

Preferably, the handle slides to alternate and is connected with the fixed pin, a plurality of fixed orificess have been seted up to the bottom of base, and are a plurality of the fixed orifices is the circumference and arranges, the fixed pin alternates with the inner chamber screw thread of fixed orifices and is connected.

Preferably, the two sides of the heavy hammer are fixedly connected with guide blocks, guide grooves are formed in the inner sides of the support frames, and the guide blocks are slidably inserted into the inner cavities of the guide grooves.

Preferably, the equal fixedly connected with supporting leg in edge of base, the bottom fixedly connected with telescopic cylinder of supporting leg.

Preferably, the output end of the telescopic cylinder is in transmission connection with an installation block, and the bottom end of the installation block is fixedly connected with a universal wheel.

The utility model has the technical effects and advantages that:

(1) according to the utility model, the motor, the threaded rod and the limiting block are matched, the output end of the motor drives the threaded rod to rotate, so that the limiting block slides on the supporting frame, the height required by the heavy hammer can be set in advance through the scale marks on the supporting frame, the heavy hammer is directly lifted to the position below the limiting block, and the scale marks at the bottom end of the limiting block indicate the height of the heavy hammer and the height of the pile foundation;

(2) the utility model utilizes the arrangement mode of matching the electric hoist, the steel wire rope, the guide device, the hook and the heavy hammer, the heavy hammer can be easily lifted and lowered, meanwhile, the arrangement of the telescopic cylinder is convenient for leveling the base on a construction site, and the arrangement of the universal wheel is convenient for a worker to horizontally translate the whole device.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

FIG. 2 is a schematic diagram of the front internal structure of the present invention.

FIG. 3 is an enlarged schematic view of the structure A in FIG. 2 according to the present invention.

Fig. 4 is a schematic structural view of the guiding device of the present invention.

In the figure: 1. a base; 2. a support frame; 3. a height adjustment mechanism; 31. a handle; 32. a threaded rod; 33. a limiting block; 4. a drop hammer device; 41. an electric hoist; 42. a wire rope; 43. a guide device; 431. a first guide roller; 432. a second guide roller; 433. a support plate; 44. hooking; 45. a weight; 5. a guide block; 6. a telescopic cylinder; 7. a universal wheel; 8. and fixing the pin.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The utility model provides a drop hammer height adjusting device for pile foundation high strain detection, which comprises a base 1, wherein the top end of the base 1 is fixedly connected with a support frame 2, the support frame 2 is provided with a height adjusting mechanism 3, the base 1 is provided with a drop hammer device 4, the support frame 2 plays a role in supporting the height adjusting mechanism 3, the height adjusting mechanism 3 comprises a handle 31, a threaded rod 32 and a limit block 33, the top ends of the two support frames 2 are fixedly connected with an installation block, one end of the threaded rod 32 is rotatably connected with the installation block, the other end of the threaded rod 32 is rotatably connected with the base 1 in an inserting way, the bottom end of the threaded rod 32 is fixedly connected with the handle 31, the limit block 33 is connected with the threaded rod 32 in an inserting way, the limit block 33 is connected with the support frame 2 in a sliding inserting way, the support frame 2 is provided with scale marks, the handle 31 is slidably connected with a fixing pin 8 in an inserting way, the bottom of the base 1 is provided with a plurality of fixing holes which are arranged in a circumferential manner, the fixing pins 8 are in threaded penetrating connection with inner cavities of the fixing holes, the fixing pins 8 play a role in fixing the handle 31, so as to fix the height adjusting mechanism 3, the fixing pins 8 are screwed out, the handle 31 is rotated to drive the threaded rod 32 to rotate, so that the limiting blocks 33 ascend or descend on the threaded rod 32, and scales indicated by the limiting blocks 33, namely height difference between the heavy hammer 45 and a pile foundation, one side of the support frame 2 is provided with an observation platform which is fixedly connected to the top end of the base 1, the arrangement of the observation platform is convenient for workers to observe and read scale marks, the drop hammer device 4 comprises an electric hoist 41, a steel wire rope 42, a guide device 43, a hook 44 and a heavy hammer 45, the electric hoist 41 is fixedly installed at the top end of the base 1, the electric hoist 41 is electrically connected with an external power supply through an external switch, the output end of the electric hoist 41 is connected with a winch in a transmission manner, one end of a steel wire rope 42 is fixedly connected with a hook 44, the other end of the steel wire rope 42 is connected with the winch in a winding manner, a guide device 43 is fixedly connected to the top end of the support frame 2, the steel wire rope 42 is matched with the guide device 43, the hook 44 is connected with the top end of a heavy hammer 45, the length of the steel wire rope 42 can be controlled by the electric hoist 41, so that the heavy hammer 45 is pulled to ascend or descend by the hook 44, the hook 44 is controlled by an external controller to loosen or clamp the hook 44, the guide device 43 comprises a first guide roller 431, a second guide roller 432 and a support plate 433, the support plate 433 is fixedly arranged at the top end of the support frame 2, one end of the support plate 433 is rotatably connected with the first guide roller 431, the other end of the support plate 433 is rotatably connected with the second guide roller 432, and both the first guide roller 431 and the second guide roller 432 are slidably connected with the steel wire rope 42, the middle part of the base 1 is provided with a groove, before hammering, the groove is coincided with the pile foundation, the heavy hammer 45 is jointed with the pile foundation, the height value of the scale mark, namely the height difference between the heavy hammer 45 and the pile foundation, the heavy hammer 45 is connected with the inner cavity of the groove in a sliding and penetrating way, the first guide roller 431 and the second guide roller 432 play a role in guiding the steel wire rope 42, the two sides of the heavy hammer 45 are fixedly connected with guide blocks 5, the inner side of the support frame 2 is provided with guide grooves, the guide blocks 5 are connected with the inner cavity of the guide grooves in a sliding and penetrating way, the guide blocks 5 play a role in guiding the heavy hammer 45, the deviation of the angle during falling is prevented, the error in the test is caused, the corners of the base 1 are fixedly connected with support legs, the bottom ends of the support legs are fixedly connected with telescopic cylinders 6, the output ends of the telescopic cylinders 6 are connected with mounting blocks in a transmission way, and the bottom ends of the mounting blocks are fixedly connected with universal wheels 7, telescopic cylinder 6 can adjust according to the site environment, guarantees base 1's level to and the height of weight 45 and pile foundation, the setting up of universal wheel 7 is convenient carries out the displacement on the horizontal position to whole device.

The working principle of the utility model is as follows: when the drop hammer height of the pile foundation high strain detection is adjusted, the whole device is pushed to the pile foundation through the universal wheel 7, the supporting height is adjusted through the telescopic cylinder 6 according to the height of the pile foundation, so that the heavy hammer 45 is just tightly attached to the top end of the pile foundation, the fixing pin 8 is screwed out, the threaded rod 32 is driven to rotate by rotating the handle 31, the limiting block 33 is driven to ascend or descend when the threaded rod 32 rotates, the handle 31 stops rotating according to the numerical value indicated by the scale mark on the supporting frame 2, the fixing pin 8 is screwed up, the electric block 41 is started, the electric block 41 pulls up the heavy hammer 45 through the steel wire rope 42 until the electric block is attached to the limiting block 33 and stops, at the moment, the numerical value indicated by the limiting block 33, namely the height difference between the heavy hammer 45 and the pile foundation, the hook 44 is controlled by an external controller to loosen the heavy hammer 45, the heavy hammer 45 falls straight down according to the matching of the guide block 5 and the guide groove, and hammers the pile foundation, and finishing the hammering process of the pile foundation.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the utility model.

Claims

1. A drop hammer height adjusting device for pile foundation high strain detection comprises a base (1) and is characterized in that a supporting frame (2) is fixedly connected to the top end of the base (1), a height adjusting mechanism (3) is arranged on the supporting frame (2), and a drop hammer device (4) is arranged on the base (1);

height adjusting mechanism (3) are including handle (31), threaded rod (32) and stopper (33), two the top fixedly connected with installation piece of support frame (2), the one end and the installation piece of threaded rod (32) rotate to be connected, the other end and base (1) of threaded rod (32) rotate to alternate and be connected, the bottom and handle (31) fixed connection of threaded rod (32), stopper (33) alternate with threaded rod (32) screw thread and be connected, stopper (33) alternate with support frame (2) slip and be connected, be provided with the scale mark on support frame (2).

2. The drop hammer height adjusting device for detecting the high strain of the pile foundation is characterized in that the drop hammer device (4) comprises an electric hoist (41), a steel wire rope (42), a guide device (43), a hook (44) and a heavy hammer (45), the electric hoist (41) is fixedly arranged at the top end of the base (1), the output end of the electric hoist (41) is in transmission connection with a winch, one end of the steel wire rope (42) is fixedly connected with the hook (44), the other end of the steel wire rope (42) is in winding connection with the winch, the guide device (43) is fixedly connected to the top end of the support frame (2), the steel wire rope (42) is matched with the guide device (43), and the hook (44) is connected with the top end of the heavy hammer (45).

3. The drop hammer height adjusting device for detecting the high strain of the pile foundation is characterized in that the guiding device (43) comprises a first guide roller (431), a second guide roller (432) and a supporting plate (433), the supporting plate (433) is fixedly connected to the top end of the supporting frame (2), one end of the supporting plate (433) is rotatably connected with the first guide roller (431), the other end of the supporting plate (433) is rotatably connected with the second guide roller (432), and the first guide roller (431) and the second guide roller (432) are both slidably connected with the steel wire rope (42).

4. The drop hammer height adjusting device for detecting the pile foundation high strain according to claim 1, wherein a fixing pin (8) is slidably inserted and connected to the handle (31), a plurality of fixing holes are formed in the bottom end of the base (1), the fixing holes are circumferentially arranged, and the fixing pin (8) is inserted and connected with inner cavity threads of the fixing holes.

5. The drop hammer height adjusting device for detecting the high strain of the pile foundation as claimed in claim 2, wherein the heavy hammer (45) is fixedly connected with a guide block (5) at both sides, the support frame (2) is provided with a guide groove at the inner side, and the guide block (5) is slidably inserted into the inner cavity of the guide groove.

6. The drop hammer height adjusting device for detecting the high strain of the pile foundation is characterized in that supporting legs are fixedly connected to corners of the base (1), and telescopic cylinders (6) are fixedly connected to bottom ends of the supporting legs.

7. The drop hammer height adjusting device for pile foundation high strain detection according to claim 6, wherein the output end of the telescopic cylinder (6) is in transmission connection with a mounting block, and a universal wheel (7) is fixedly connected to the bottom end of the mounting block.