CN112878398A - Pile pipe hammering test equipment and test method - Google Patents
Pile pipe hammering test equipment and test method Download PDFInfo
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- CN112878398A CN112878398A CN202110307199.2A CN202110307199A CN112878398A CN 112878398 A CN112878398 A CN 112878398A CN 202110307199 A CN202110307199 A CN 202110307199A CN 112878398 A CN112878398 A CN 112878398A
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- 238000012360 testing method Methods 0.000 title claims abstract description 59
- 238000010998 test method Methods 0.000 title abstract description 11
- 238000006073 displacement reaction Methods 0.000 claims description 27
- 238000000034 method Methods 0.000 claims description 18
- 230000007246 mechanism Effects 0.000 claims description 16
- 238000001514 detection method Methods 0.000 claims description 12
- 230000001133 acceleration Effects 0.000 claims description 10
- 230000035515 penetration Effects 0.000 claims description 6
- 238000004088 simulation Methods 0.000 abstract description 11
- 230000008569 process Effects 0.000 description 13
- 238000005553 drilling Methods 0.000 description 8
- 239000003921 oil Substances 0.000 description 8
- 210000003128 head Anatomy 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000002283 diesel fuel Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
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- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention provides a pile pipe hammering test device and a test method, wherein the pile pipe hammering test device comprises: the pile pipe driving device comprises a support base body, a guide post, a pile pipe driving replacing plate and a hammering device; the guide post is fixed on the support base body and extends along the vertical direction; the pile pipe replacing plate is slidably arranged on the guide post, and a pile pipe connecting part for connecting a pile pipe to be tested is arranged on the lower side of the pile pipe replacing plate; the hammering device is used for applying downward hammering force to the upper side of the pile pipe replacing plate. The invention solves the technical problem of poor accuracy in the existing piling operation simulation test.
Description
Technical Field
The invention relates to the technical field of offshore drilling platforms, in particular to a pile pipe hammering test device and a test method.
Background
The piling operation of the pile pipe is a key step for installing the offshore drilling platform. The method has the advantages that various data in the piling operation process are obtained, and the method has important significance for piling operation. However, since the operation process is dangerous in the pile pipe piling operation process, it is difficult to actually measure and acquire various data in the pile pipe piling operation process. At present, a small-scale pile pipe is generally adopted to carry out a simulation test: the hammering process is simulated by the small-scale pile pipe, and approximate test data are obtained through tests. The pile pipe piling operation of the offshore drilling platform is known by utilizing the small-scale pile pipe, adopting a small-sized pile driver to carry out pile driving test and acquire data and carrying out simulation test. The pile pipe piling operation is researched by utilizing data acquired by a simulation test so as to guide and improve the pile pipe piling operation of the offshore drilling platform, but the existing simulation test has the technical problem of poor accuracy, and difficulty is caused for the research and improvement of the pile pipe piling operation.
Disclosure of Invention
The invention aims to provide pile pipe hammering test equipment and a test method, which are used for relieving the technical problem of poor accuracy in the conventional pile driving operation simulation test
The above object of the present invention can be achieved by the following technical solutions:
the invention provides a pile pipe hammering test device, which comprises: the pile pipe driving device comprises a support base body, a guide post, a pile pipe driving replacing plate and a hammering device; the guide post is fixed on the support base body and extends along the vertical direction;
the pile pipe replacing plate is slidably arranged on the guide post, and a pile pipe connecting part for connecting a pile pipe to be tested is arranged on the lower side of the pile pipe replacing plate; the hammering device is used for applying downward hammering force to the upper side of the pile pipe replacing plate.
In a preferred embodiment, the hammering device comprises a hammer block, a lifting mechanism and an electromagnet, wherein the electromagnet is configured to connect the hammer block and the lifting mechanism together by using electromagnetic force, and the hammer block is positioned below the electromagnet; the lifting mechanism is used for driving the hammer body and the electromagnet to move upwards.
In a preferred embodiment, the hammer block is slidably mounted to the guide post.
In a preferred embodiment, the pile tube connection comprises a connection recess configured for receiving an upper end of the pile tube to be tested.
In a preferred embodiment, the lifting mechanism includes a servo motor, a ball screw and a screw nut seat mounted on the support seat body, the ball screw is connected to the screw nut seat, and the servo motor is connected to the screw nut seat and is configured to drive the screw nut seat to rotate so as to drive the ball screw to move up and down.
In a preferred embodiment, the pile tube replacement plate is provided with a displacement detection module, and/or the pile tube replacement plate is provided with an acceleration detection module.
In a preferred embodiment, the support base comprises a plurality of cylinder legs, and the cylinder legs can extend and retract up and down.
In a preferred embodiment, the support base body comprises a cross-shaped base and 4 oil cylinder supporting legs, and the 4 oil cylinder supporting legs are respectively arranged on 4 supporting beams of the cross-shaped base.
In a preferred embodiment, a plurality of angular sensors are arranged on the support base in a staggered manner.
The invention provides a pile pipe hammering test method, which adopts the pile pipe hammering test equipment and comprises the following steps: fixedly connecting the pile pipe to be detected to the pile pipe connecting part; the hammering device applies downward hammering force to the upper side of the pile pipe replacing plate; and recording the penetration of the pile pipe to be detected.
The invention has the characteristics and advantages that:
connecting the pile pipe to be tested to the pile pipe connecting part of the pile pipe alternate driving plate, wherein the pile pipe to be tested and the pile pipe alternate driving plate can move together; and the hammering device applies hammering force to the pile pipe replacing plate, and the hammering force is transmitted to the pile pipe to be tested through the pile pipe replacing plate, so that the pile pipe to be tested is stressed to move downwards, and a piling test is realized. In the test equipment, the pile pipe replacing driving plates are guided and righted through the guide columns, and the pile pipe to be tested and the pile pipe replacing driving plates are connected together, so that the pile pipe is righted, the verticality between the pile pipe to be tested and the ground is well controlled, the pile head deflection caused by vibration or other external reasons in the pile driving operation process is reduced, the actual working condition of the pile pipe pile driving operation of the offshore drilling platform is more accurately simulated, and the accuracy of a simulation test is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Figure 1 is an isometric view of a pile tube hammering test apparatus provided by the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
FIG. 3 is a front view of the pile pipe hammering test apparatus shown in FIG. 1;
fig. 4 is a schematic view of connection between a pile pipe to be tested and a pile pipe replacement plate in the pile pipe hammering test equipment shown in fig. 3;
FIG. 5 is a top view of the pile pipe hammering test apparatus shown in FIG. 1;
fig. 6 is a schematic view of the pile pipe hammering test method provided by the present invention.
The reference numbers illustrate:
10. a support base; 11. a cross-shaped base; 12. an oil cylinder support leg; 13. an angle sensor;
20. a guide post;
30. replacing the pile pipe with a knock-out plate; 31. a pile tube connecting part; 32. a connecting groove;
40. a hammering device; 41. a hammer body; 411. a hammer portion; 412. a cross plate; 413. a cross-shaped end portion;
42. an electromagnet;
43. a lifting mechanism; 431. a servo motor; 432. a ball screw; 433. a lead screw nut seat;
50. a displacement detection module; 51. an ultrasonic displacement sensor;
60. and (5) a pile pipe to be tested.
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.
Utilize little scale stake pipe, adopt small-size pile driver to carry out pile test and data acquisition to carry out analogue test, current analogue test has the relatively poor technical problem of accuracy.
In order to improve the accuracy of the simulation test, the inventor researches a pile driving test and pile pipe pile driving operation of an offshore drilling platform, and finds that in the pile pipe pile driving operation, an actual pile pipe is restrained by a jacket platform and a plurality of layers of guide holes of the jacket platform, and the pile pipe pile driving is performed under the working condition with centering and righting functions. The pile driving test lacks the working condition in the real operation process, so that the accuracy of the simulation test is lower.
In a small-scale pile tube piling test performed by adopting a small-sized pile driver, the small-sized pile driver imposes constraint on the end part of the pile tube and cannot well control the perpendicularity of the pile tube and the ground. The pile head of the pile pipe is easy to be inclined due to vibration or other external reasons in the piling operation process; in addition, a method for detecting levelness or verticality is not available, observation can only be carried out by human eyes, or the inclination of the pile pipe can be measured by a simple measuring tool, so that the timeliness is low, the operation risk is large, the measuring error is large and the like. The pile driver generally adopts the diesel oil hammer, and the fuel injection quantity of diesel oil hammer is controlled by the manual work, and the fuel injection quantity of difficult control every time is the same, and impact energy is difficult to control. The penetration degree of the pile tube in the piling process is completely observed by human eyes, the actual measurement cannot be carried out, and the obtained data is inaccurate.
Example one
The present invention provides a pile pipe hammering test apparatus, as shown in fig. 1 and 3, comprising: the pile pipe driving device comprises a support seat body 10, a guide post 20, a pile pipe driving replacing plate 30 and a hammering device 40; the guide post 20 is fixed on the support base 10 and extends along the vertical direction; the pile pipe replacing plate 30 is slidably mounted on the guide post 20, and a pile pipe connecting part 31 for connecting a pile pipe 60 to be tested is arranged on the lower side of the pile pipe replacing plate 30; the hammering device 40 is used to apply a downward hammering force to the upper side of the pile tube knock-out plate 30.
Connecting the pile pipe 60 to be tested to the pile pipe connecting part 31 of the pile pipe replacing plate 30, wherein the pile pipe 60 to be tested can move together with the pile pipe replacing plate 30; the hammering device applies hammering force to the pile pipe replacing plate 30, the hammering force is transmitted to the pile pipe 60 to be tested through the pile pipe replacing plate 30, the pile pipe 60 to be tested is forced to move downwards, and a piling test is achieved. In the test equipment, the pile pipe driving replacing plate 30 is guided and righted through the guide post 20, and the pile pipe 60 to be tested and the pile pipe driving replacing plate 30 are connected together, so that the pile pipe is righted, the verticality of the pile pipe 60 to be tested and the ground is well controlled, the pile head deflection caused by vibration or other external reasons in the pile driving operation process is reduced, the actual working condition of the pile pipe pile driving operation of the offshore drilling platform is more accurately simulated, and the accuracy of a simulation test is improved.
As shown in fig. 1 and 3, the hammering device 40 includes a hammer body 41, a lifting mechanism 43, and an electromagnet 42, the electromagnet 42 is configured to connect the hammer body 41 and the lifting mechanism 43 together using electromagnetic force, and the hammer body 41 is located below the electromagnet 42; the lifting mechanism 43 is used for driving the hammer body 41 and the electromagnet 42 to move upwards, and after the electromagnet 42 reaches a set height, the electromagnet 42 is powered off, loses magnetic force, releases the hammer body 41, and hammers the pile pipe replacing plate 30 and the pile pipe 60 to be tested. The lifting mechanism 43 drives the hammer body 41 to move upwards through the electromagnet 42 so as to accurately control the falling height of the hammer body 41; the piling work is performed by the free falling of the hammer body 41, and the hammering energy can be controlled by controlling the falling height of the hammer body 41, thereby precisely controlling the hammering energy.
This test equipment controls the height of falling through hoist mechanism 43 to control the hammering energy, be convenient for adjust the height of falling, can conveniently accurately control the hammering energy, both can satisfy the hammering of deciding the energy to the stake pipe, also can satisfy the hammering of alternation energy to the stake pipe.
The hammer body 41 is lifted or released by utilizing the electromagnet 42, and the electromagnet 42 can be fixedly arranged on the upper surface of the hammer body 41, which replaces a beating plate, or can be fixedly connected to the lower end of the ball screw 432; preferably, the electromagnet 42 is fixedly attached to the lower end of the ball screw 432.
Further, the hammer body 41 is slidably mounted on the guide post 20, and the hammer body 41, the pile tube replacement plate 30 and the pile tube 60 to be tested are all connected with the guide post 20 and are all guided and straightened by the same structure, so that the hammer body 41 and the pile tube 60 to be tested can be aligned better, the pile tube is prevented from being inclined, and the test accuracy is further improved.
Further, the pile pipe hammering test equipment comprises 4 guide columns 20 which are distributed in a rectangular shape; the hammer body 41 comprises a hammer part 411 and a cross plate 412, the hammer part 411 is fixedly connected to the lower side of the cross plate 412, 4 cross end parts 413 of the cross plate 412 are slidably mounted on the 4 guide columns 20 in a one-to-one correspondence mode, the hammer body 41 is guided by the 4 guide columns 20 distributed in a rectangular mode, the hammer body 41 moves downwards more stably, hammering energy is controlled by controlling the falling height more accurately, the direction of hammering force applied by the hammer body 41 is consistent with the hammering direction of the pile pipe 60 to be tested, and therefore testing accuracy is improved. As shown in fig. 1, the cross end 413 is provided with a first through hole, and the guide post 20 is slidably disposed through the first through hole; the pile tube replacement plate 30 has 4 corners which are in sliding fit with the guide posts 20, the corners are provided with second through holes, and the guide posts 20 are slidably arranged in the second through holes in a penetrating manner.
The pile pipe 60 to be tested can adopt a small-scale pile pipe. As shown in fig. 4, the pile tube connecting portion 31 includes a connecting groove 32, the connecting groove 32 is configured to receive the upper end portion of the pile tube 60 to be tested, and the hammering force is transmitted by abutting the bottom surface of the connecting groove 32 against the end surface of the upper end of the pile tube 60 to be tested; the inner wall of the connecting groove 32 contacts with the outer wall of the pile pipe 60 to be tested, so that the position of the pile pipe is restrained and the righting effect is achieved. Preferably, the connecting groove 32 is a circular blind hole, and the inner diameter of the circular blind hole is matched with the outer diameter of the upper end of the pile tube 60 to be tested.
In one embodiment, the lifting mechanism 43 includes a servo motor 431, a ball screw 432 and a screw nut seat 433 mounted on the support base 10, the ball screw 432 is connected to the screw nut seat 433, and the servo motor 431 is connected to the screw nut seat 433 for driving the screw nut seat 433 to rotate so as to drive the ball screw 432 to move up and down, thereby precisely controlling the falling height of the hammer body 41 and improving the accuracy of the test. Specifically, screw nut seat 433 includes screw nut and pedestal, and screw nut rotatably installs in the pedestal, and the pedestal is fixed in the top of guide post 20, and ball 432 and the cooperation of screw nut, ball 432 are restricted to rotate, and servo motor 431 is connected with screw nut to it is rotatory to drive screw nut, thereby orders about ball 432 and reciprocates. Preferably, the lifting mechanism 43 includes a proximity switch mounted to the guide post 20 to control the range of travel of the ball screw 432.
In one embodiment, the displacement detecting module 50 is disposed on the pile pipe replacement plate 30, and the displacement detecting module 50 is configured to monitor displacement changes of the pile pipe replacement plate 30 and the pile pipe 60 to be tested. Specifically, the displacement detection module 50 includes an ultrasonic displacement sensor 51, as shown in fig. 1, the ultrasonic displacement sensor 51 is installed on the pile pipe displacement plate 30, the pile pipe displacement plate 30 moves downward along with the pile pipe 60 to be detected, the detection data of the ultrasonic displacement sensor 51 changes along with the downward movement of the pile pipe 60 to be detected, the displacement change condition can be effectively monitored in real time, the ultrasonic displacement sensor 51 has the characteristics of convenience and rapidness in monitoring, low failure rate and real-time data output, and the penetration degree of the pile pipe can be conveniently monitored at any time and recorded. The penetration degree refers to the depth (mm/10 hits) of the pile pipe entering the soil body every 10 hits when the pile pipe is hammered, so as to evaluate the difficulty degree of the pile body hammering in the soil.
In one embodiment, an acceleration detection module (not shown) is disposed on the pile pipe replacement plate 30 to detect the acceleration variation curves of the pile pipe replacement plate 30 and the pile pipe 60 to be tested. Specifically, the acceleration detection module comprises an acceleration sensor and a signal transmission module thereof, the acceleration sensor is fixed on the alternate board, and preferably, the acceleration sensor is located near the ultrasonic displacement sensor 51.
As shown in fig. 1 and 3, the support base 10 includes a plurality of cylinder legs 12, and the cylinder legs 12 can be extended and contracted up and down. The levelness of the supporting seat is adjusted by respectively performing telescopic adjustment on each oil cylinder supporting leg 12, so that the guide column 20 is perpendicular to the horizontal plane. Specifically, the test equipment comprises a miniature hydraulic station, an oil cylinder supporting leg 12 serves as a supporting leg of the whole equipment and bears the weight of the whole equipment, the oil cylinder supporting leg 12 comprises a hydraulic cylinder and a hydraulic cylinder displacement sensor, the miniature hydraulic station supplies hydraulic oil for the hydraulic cylinder, and the hydraulic cylinder displacement sensor detects the extension length of the hydraulic cylinder in real time.
As shown in fig. 1 and 5, the support base 10 includes a cross base 11 and 4 cylinder legs 12, the 4 cylinder legs 12 are respectively disposed on 4 support beams of the cross base 11, and the 4 cylinder legs 12 are matched and respectively perform telescopic movement, so as to adjust the levelness of the cross base 11 and the verticality of the guide post 20. The cross-shaped base 11 is provided with a through hole for the pile pipe 60 to be tested to pass through. The cross-shaped base 11 can be made of section steel and steel plates by welding and mainly plays a role in bearing.
As shown in fig. 1 and 2, a plurality of angular sensors 13 are disposed on the support base 10 in a staggered manner. The angle sensor 13 monitors the support base deflection caused by foundation or other vibration, and the pile pipe deflection caused thereby, can carry out angle feedback in real time, and can control the balance of the equipment by adjusting the telescopic height of the oil cylinder supporting leg 12 in the pile driving intermission period. Because the pile pipe 60 to be measured is connected with the pile pipe replacing board 30 through the pile pipe connecting part 31, the perpendicularity of the pile pipe 60 to be measured can be adjusted while the perpendicularity of the equipment guide post 20 is adjusted, the vertical state of the pile pipe 60 to be measured is convenient to keep in real time, and the accuracy of data is improved. Preferably, as shown in fig. 2, two angle sensors 13 are disposed on the support base 10, the two angle sensors 13 are perpendicular to each other and disposed on a support beam of the cross-shaped base 11, one angle sensor 13 is perpendicular to the support beam, and the other angle sensor 13 is parallel to the support beam.
The test equipment comprises an electrical control system, wherein the electrical control system comprises an electric cabinet and a plc Controller (Programmable Logic Controller). The electric signal fed back by the ultrasonic displacement sensor 51 is converted into displayable data through a plc controller, and can also be transmitted to a data acquisition instrument through a signal line, so as to realize detection of a displacement change curve. The electric signal of the acceleration detection module is converted into displayable data through a plc controller, and can also be transmitted to a data acquisition instrument through a signal line, so that the acceleration change curve is detected.
The test equipment has the following advantages: (1) under the constraint action of the pile pipe replacing plate 30 and the guide column 20, the perpendicularity of the pile pipe 60 to be detected to the ground can be effectively ensured in the operation process, and the perpendicularity of the pile pipe 60 to be detected can be conveniently adjusted; (2) the provided hammering energy is a drop hammer type, and the hammering energy can be accurately controlled by accurately controlling the height of the drop hammer; (3) during the piling test, the ultrasonic displacement sensor 51 can be used for monitoring, and the displacement data of the pile pipe 60 to be tested can be provided timely and accurately; (4) if the pile head of the pile pipe 60 to be tested is inclined due to vibration or other external reasons in the piling operation process, the angle sensor 13 can automatically monitor the inclination condition and the horizontal state of the equipment, automatically adjust the horizontal condition and centralize the pile pipe 60 to be tested, and the pile pipe straightening machine has the advantages of high automation degree, high operation efficiency and the like, and can meet the automatic centering of the pile pipe and the automatic centralizing of the pile pipe.
Example two
The invention provides a pile pipe hammering test method, which adopts the pile pipe hammering test equipment, and as shown in figure 6, the test method comprises the following steps: step S10, fixedly connecting the pile pipe 60 to be tested to the pile pipe connecting part 31; step S20, the hammering device 40 applies a downward hammering force to the upper side of the pile tube replacement plate 30; and step S30, recording the penetration degree of the pile pipe 60 to be tested.
By adopting the test method, the pile pipe 60 to be tested is connected to the pile pipe connecting part 31 of the pile pipe replacing plate 30, and the pile pipe 60 to be tested can move together with the pile pipe replacing plate 30; the hammering device applies hammering force to the pile pipe replacing plate 30, the hammering force is transmitted to the pile pipe 60 to be tested through the pile pipe replacing plate 30, the pile pipe 60 to be tested is forced to move downwards, and a piling test is achieved. According to the test method, the pile pipe driving replacing plate 30 is guided and righted through the guide post 20, and the pile pipe 60 to be tested and the pile pipe driving replacing plate 30 are connected together, so that the pile pipe is righted, the verticality of the pile pipe 60 to be tested and the ground is well controlled, the pile head deflection caused by vibration or other external reasons in the piling operation process is reduced, the actual working condition of the pile pipe piling operation of the offshore drilling platform is simulated more accurately, and the accuracy of the simulation test is improved.
Specifically, step S10 includes: step S11, placing the pile pipe 60 to be tested to the central position of the support base 10, adopting a meter ruler or a steel plate ruler to measure whether the lower part of the pile pipe 60 to be tested is at the central position of the support base 10, gradually adjusting to the central position, installing the pile pipe replacing plate 30 to the upper end of the pile pipe, and righting the upper end of the pile pipe 60 to be tested by utilizing the centering and righting effect of the pile pipe replacing plate 30 and the guide post 20; in step S12, the hammer block 41 is attracted by the electromagnet 42 at the end of the ball screw 432, the ball screw 432 is manually controlled to move downward, the hammer block 41 is placed on the pile tube replacement plate 30, and the ball screw 432 moves upward to a safe height.
Step S20 includes: step S21, calculating the required drop hammer height by calculating the required hammering energy, and inputting the drop hammer height on the control panel of the electric control system; step S22, after the device is started, the levelness self-check is carried out, the levelness is automatically adjusted after the check, the ultrasonic displacement sensor 51 is automatically cleared after the levelness adjustment is finished, then the ball screw 432 moves downwards, whether the position of the hammer body 41 is reached is detected through a proximity switch in the electromagnet 42, and when the proximity switch has a signal, the ball screw 432 stops; step S23, the electromagnet 42 is attracted to attract the hammer body 41, and the hammer body is lifted according to the set drop hammer height; after reaching the designated height, the electromagnet 42 is released, and the hammer head falls.
Step S30 includes: the ultrasonic displacement sensor 51 detects and records the displacement condition; the two angle sensors 13 respectively detect horizontal errors caused by operation vibration in two horizontal directions, if the detection errors are large, the electric control system automatically adjusts the height of the oil cylinder supporting leg 12 to adjust the levelness, so that the pile pipe 60 to be detected is kept in a vertical state, and the data of the ultrasonic displacement sensor 51 is automatically reset and calibrated so as to record subsequent displacement.
And repeating the step S20 and the step S30 until the pile pipe 60 to be tested is driven to the required height. If the hammering energy needs to be adjusted, the height of the drop hammer is adjusted. The steps S20 and S30 can be programmed in the plc controller to realize automatic control.
The above description is only a few embodiments of the present invention, and those skilled in the art can make various changes or modifications to the embodiments of the present invention according to the disclosure of the application document without departing from the spirit and scope of the present invention.
Claims (10)
1. A pile tube hammering test apparatus, comprising: the pile pipe driving device comprises a support base body, a guide post, a pile pipe driving replacing plate and a hammering device; the guide post is fixed on the support base body and extends along the vertical direction;
the pile pipe replacing plate is slidably arranged on the guide post, and a pile pipe connecting part for connecting a pile pipe to be tested is arranged on the lower side of the pile pipe replacing plate; the hammering device is used for applying downward hammering force to the upper side of the pile pipe replacing plate.
2. The pile tube hammering testing apparatus of claim 1, wherein the hammering device comprises a hammer block, a lifting mechanism, and an electromagnet, the electromagnet is configured to connect the hammer block and the lifting mechanism together using electromagnetic force, and the hammer block is located below the electromagnet; the lifting mechanism is used for driving the hammer body and the electromagnet to move upwards.
3. The pile tube hammering testing apparatus of claim 2 wherein the hammer block is slidably mounted to the guide post.
4. The pile tube hammering test apparatus of claim 2 wherein the pile tube connecting portion comprises a connecting groove configured to receive an upper end portion of the pile tube under test.
5. The pile tube hammering testing apparatus according to claim 2, wherein the lifting mechanism comprises a servo motor, a ball screw and a screw nut seat mounted on the support seat body, the ball screw is connected to the screw nut seat, and the servo motor is connected to the screw nut seat for driving the screw nut seat to rotate so as to drive the ball screw to move up and down.
6. The pile tube hammering testing apparatus according to claim 1, wherein the pile tube take-off plate is provided with a displacement detection module, and/or the pile tube take-off plate is provided with an acceleration detection module.
7. The pile tube hammering testing apparatus of claim 1, wherein the support base comprises a plurality of cylinder legs, the cylinder legs being capable of telescoping up and down.
8. The pile tube hammering testing apparatus according to claim 7, wherein the support base comprises a cross-shaped base and 4 cylinder legs, and the 4 cylinder legs are respectively disposed on 4 support beams of the cross-shaped base.
9. The pile tube hammering testing apparatus according to claim 1, wherein a plurality of angular sensors are provided on the support base in a staggered arrangement.
10. A method of pile pipe hammering test, wherein the apparatus of any one of claims 1 to 9 is used, the method comprising: fixedly connecting the pile pipe to be detected to the pile pipe connecting part; the hammering device applies downward hammering force to the upper side of the pile pipe replacing plate; and recording the penetration of the pile pipe to be detected.
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| CN202110307199.2A CN112878398A (en) | 2021-03-23 | 2021-03-23 | Pile pipe hammering test equipment and test method |
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| CN202110307199.2A CN112878398A (en) | 2021-03-23 | 2021-03-23 | Pile pipe hammering test equipment and test method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113389199A (en) * | 2021-07-12 | 2021-09-14 | 中国石油大学(北京) | Foundation vibration hammer land construction device and operation method thereof |
| CN114575393A (en) * | 2022-03-04 | 2022-06-03 | 青岛理工大学 | Test device and method for simulating hammering pile sinking-water immersion static load |
| CN115434319A (en) * | 2022-09-26 | 2022-12-06 | 江苏龙源振华海洋工程有限公司 | Pile replacement in marine pile driving system Secondary impact buffering system |
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| CN115434319B (en) * | 2022-09-26 | 2024-03-22 | 江苏龙源振华海洋工程有限公司 | Alternate beating secondary impact buffer system in ocean pile driving system |
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