Pile structure vertical compressive static load testing machine

Abstract

The utility model discloses a pile structure vertical compressive static load tester, which relates to the field of geotechnical engineering testing technology. It includes a reference measuring frame and a prefabricated foundation pile, the reference measuring frame is fixedly installed with a magnetic base fixing clamp, the magnetic base fixing clamp is fixedly installed with a dial indicator, the upper end of the prefabricated foundation pile is provided with a detection mechanism, the detection mechanism includes a detection beam arranged at the upper end of the prefabricated foundation pile, a pressure sensor is arranged in the positioning sleeve, and a counterweight mechanism is connected to the two ends of the detection beam. In the pile structure vertical compressive static load tester described in the utility model, the pressure applied by the counterweight mechanism to the prefabricated foundation pile will be detected by the pressure sensor on the detection mechanism, and the pressure will cause the prefabricated foundation pile to move downward, and the pointer at the bottom of the dial indicator points to the reference amount to read the data of the vertical displacement of the pile body, thereby testing the compressive resistance of the prefabricated foundation pile, and the test does not require carrying a large counterweight block and a hydraulic pump station, which is convenient for users to use.

Description

Technical Field

[0001] The utility model relates to the technical field of geotechnical engineering testing, in particular to a vertical compression static load testing machine for a pile structure. Background Art

[0002] In order to better obtain solar energy and facilitate installation, photovoltaic panels in photovoltaic fields usually use prefabricated reinforced concrete pipe piles as the foundation, which are exposed to a certain height above the ground. The installation of photovoltaic panel brackets is usually a group of 4-8 piles per row. Its foundation construction mainly adopts hole hammering method, static pressure method, vibration pile forming and other process methods. Under normal circumstances, the vertical load borne by photovoltaic pile foundation is not large. Although the vertical bearing capacity requirements of each pile are not high, uneven settlement is strictly prohibited in each group of foundations. If it occurs, it will easily lead to the normal operation and service life of the group of brackets or photovoltaic panels. After the construction of the photovoltaic foundation is completed, attention should be paid to the detection of its bearing capacity.

[0003] Announcement No. CN216275869U discloses a single pile vertical compressive static load test equipment for photovoltaic electric field pipe pile high pile foundation, including a main beam and a jack located below the main beam, as well as a load mechanism arranged on the main beam and a fixing mechanism arranged on the jack; the load mechanism includes a lock, a hanging ring, a steel wire rope, a lifting ring and a counterweight block, and a lock is movably provided at each end of the main beam, and the lock is a "U-shaped" structure, each lock is provided with two hanging rings, and a steel wire rope is fixedly provided on the outer wall of each hanging ring, and a lifting ring is connected to the bottom end of each steel wire rope.

[0004] The above equipment can test the vertical compressive resistance of pile foundations. However, the pile foundations are generally set in the field. During the test, the user is required to carry heavier accessories such as counterweights and hydraulic pump stations. In addition, when testing the same group of pile foundations, the heavier counterweights need to be moved. The counterweights are heavy and inconvenient to move, which causes inconvenience during testing. Therefore, a pile structure vertical compressive static load testing machine is proposed. Utility Model Content

[0005] The main purpose of the utility model is to provide a pile structure vertical compressive static load testing machine, which can effectively solve the problems mentioned in the background technology.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A pile structure vertical compressive static load testing machine comprises a reference measuring frame and a prefabricated foundation pile, wherein a magnetic base fixing clamp is fixedly mounted on the reference measuring frame, a dial indicator is fixedly mounted on the magnetic base fixing clamp, a detection mechanism is arranged at the upper end of the prefabricated foundation pile, the detection mechanism comprises a detection beam arranged at the upper end of the prefabricated foundation pile, a positioning sleeve is arranged at the middle position of the bottom of the detection beam, a pressure sensor is arranged in the positioning sleeve, counterweight mechanisms are connected at both ends of the detection beam, the counterweight mechanism comprises connecting plates fixed at both ends of the detection beam, a steel wire rope is connected to the bottom of the connecting plate, a counterweight water tank is fixedly mounted on the steel wire rope, and the equipment detects the vertical compressive performance of prefabricated foundation piles in a photovoltaic field.

[0008] Furthermore, the detection mechanism also includes a first connecting hole opened at the edges of both ends of the detection beam, a docking bolt is provided in the first connecting hole, a wire notch is opened on the side wall of the positioning sleeve, and a data line is connected to the pressure sensor. The pressure sensor can detect the pressure exerted on the prefabricated piles.

[0009] Furthermore, anti-skid pads are provided on the upper and lower surfaces of the pressure sensor, and the anti-skid pads are fixed to the pressure sensor by glue.

[0010] Furthermore, the detection beam is connected to the upper end of the prefabricated foundation pile through a positioning sleeve, the upper end of the pressure sensor is in contact with the bottom of the detection beam, the lower end of the pressure sensor is in contact with the upper end of the prefabricated foundation pile, the data line extends out of the positioning sleeve through the wire notch, and the docking bolt is connected to the detection beam through the first connecting hole, and the docking bolt serves to fix the connecting plate.

[0011] Furthermore, the counterweight mechanism also includes a drain outlet fixed at the lower end of the counterweight water tank and a water inlet fixed at the upper end of the counterweight water tank, the drain outlet is connected to a sealing end cover, the water inlet is connected to a solenoid valve, and a second connecting hole is opened on the connecting plate, and the docking bolt can pass through the second connecting hole.

[0012] Furthermore, one end of the steel wire rope is fixed on the connecting plate, and the other end of the steel wire rope is fixed on the counterweight water tank.

[0013] Furthermore, the docking bolts are connected to the connecting plate through the second connecting hole, the first connecting hole on the detection beam is aligned up and down with the second connecting hole on the connecting plate, and the connecting plate is fixed at both ends of the detection beam through the docking bolts, and the detection beam will exert pressure on the prefabricated foundation piles.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] The gravity of the counterweight mechanism will be applied to the detection beam, causing the detection beam to press down on the precast pile, causing the precast pile to move downward, and the downward pressure of the detection beam will be detected by the pressure sensor, while the pointer at the bottom of the dial indicator will read the data of the vertical displacement of the pile body on the reference amount, thereby testing the compressive resistance of the precast pile.

[0016] The counterweight water tank can be connected to the detection beam by using a steel wire rope and a connecting plate. Water can be injected into the counterweight water tank through the water inlet, thereby increasing the pressure on the precast piles, controlling the load value borne by the precast piles, and detecting the sinking of the precast piles under different pressures. The sealed end cover can be opened to discharge water, making it easier to move the counterweight. Users do not need to carry heavy counterweight blocks and hydraulic pump stations, making it easy for users to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a partial structural schematic diagram of the utility model;

[0019] Figure 3 It is a schematic diagram of the detection mechanism of the utility model;

[0020] Figure 4 It is a schematic diagram of the counterweight mechanism of the utility model.

[0021] In the figure: 1. reference measuring frame; 2. prefabricated foundation pile; 3. dial indicator; 4. magnetic base fixing ring; 5. detection mechanism; 501. detection beam; 502. docking bolt; 503. first connecting hole; 504. positioning sleeve; 505. anti-slip pad; 506. data line; 507. pressure sensor; 508. wire notch; 6. counterweight mechanism; 601. counterweight water tank; 602. second connecting hole; 603. connecting plate; 604. wire rope; 605. drain outlet; 606. sealing end cover; 607. water inlet; 608. solenoid valve. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0023] like Figure 1 Figure 2As shown, a pile structure vertical compressive static load testing machine comprises a reference measuring frame 1 and a prefabricated foundation pile 2, a magnetic base fixing clamp 4 is fixedly mounted on the reference measuring frame 1, a dial indicator 3 is fixedly mounted on the magnetic base fixing clamp 4, a detection mechanism 5 is arranged at the upper end of the prefabricated foundation pile 2, the detection mechanism 5 comprises a detection beam 501 arranged at the upper end of the prefabricated foundation pile 2, a positioning sleeve 504 is arranged at the middle position of the bottom of the detection beam 501, a pressure sensor 507 is arranged in the positioning sleeve 504, counterweight mechanisms 6 are connected to the two ends of the detection beam 501, the counterweight mechanism 6 will apply pressure to the prefabricated foundation pile 2, and the pressure applied by the counterweight mechanism 6 to the prefabricated foundation pile 2 will be detected by the pressure sensor 507 on the detection mechanism 5, so that the prefabricated foundation pile 2 moves downward, and the pointer at the bottom of the dial indicator 3 points to the reference amount to read the data of the vertical displacement of the pile body, so as to test the compressive resistance of the prefabricated foundation pile 2, and the test does not need to carry a counterweight block and a hydraulic pump station with a large mass, so that the user is convenient to use.

[0024] like Figure 3 As shown, the detection mechanism 5 includes a detection beam 501 arranged at the upper end of the prefabricated foundation pile 2, a positioning sleeve 504 is provided at the middle position of the bottom of the detection beam 501, and a pressure sensor 507 is provided in the positioning sleeve 504. The detection mechanism 5 also includes a first connecting hole 503 opened at the edges of both ends of the detection beam 501, a docking bolt 502 is provided in the first connecting hole 503, a wire notch 508 is opened on the side wall of the positioning sleeve 504, a data cable 506 is connected to the pressure sensor 507, and anti-slip pads 505 are provided on the upper and lower surfaces of the pressure sensor 507.

[0025] Specifically, the gravity of the counterweight mechanism 6 will be applied to the detection beam 501, causing the detection beam 501 to press down the precast pile 2, causing the precast pile 2 to move downward, and the downward pressure of the detection beam 501 will be detected by the pressure sensor 507, and the pointer at the bottom of the dial indicator 3 will read the data of the vertical displacement of the pile body on the reference amount, thereby testing the compressive resistance of the precast pile 2.

[0026] like Figure 4 As shown, the counterweight mechanism 6 includes a connecting plate 603 fixed at both ends of the detection beam 501, a steel wire rope 604 is connected to the bottom of the connecting plate 603, a counterweight water tank 601 is fixedly installed on the steel wire rope 604, the counterweight mechanism 6 also includes a drain outlet 605 fixed at the lower end of the counterweight water tank 601 and a water inlet 607 fixed at the upper end of the counterweight water tank 601, a sealing end cover 606 is connected to the drain outlet 605, a solenoid valve 608 is connected to the water inlet 607, and a second connecting hole 602 is opened on the connecting plate 603.

[0027] Specifically, the counterweight water tank 601 can be connected to the detection beam 501 through the use of a steel wire rope 604 and a connecting plate 603, and water can be injected into the counterweight water tank 601 through the water inlet 607, thereby increasing the pressure on the prefabricated foundation pile 2, controlling the load value borne by the prefabricated foundation pile 2, and detecting the sinking of the prefabricated foundation pile 2 under different pressures. The sealing end cover 606 can be opened to discharge water, thereby reducing the weight of the counterweight mechanism 6 for easy carrying.

[0028] Furthermore, when testing the foundation piles in the photovoltaic field, the entire device is placed on the foundation piles of the photovoltaic field, and then the quality of the water in the counterweight water tank 601 is adjusted to accurately control the load value borne by the prefabricated foundation pile 2. The dial indicator 3 is installed by relying on the magnetic base fixing ring 4. The pointer at the bottom of the dial indicator 3 points to the reference amount to read the vertical displacement data of the pile body. After loading and collecting field data in accordance with the corresponding specifications, the vertical load-settlement curve, the settlement-time logarithmic curve, and the settlement-load logarithmic curve can be drawn, and then the compressive bearing capacity of the pile foundation can be determined according to the specifications.

[0029] It should be noted that the utility model is a pile structure vertical compressive static load tester. In actual use, the detection beam 501 is placed on the upper end of the prefabricated foundation pile 2, and then water can be injected into the counterweight water tank 601 through the water inlet 607. Since one end of the wire rope 604 is fixed on the connecting plate 603, and the other end of the wire rope 604 is fixed on the counterweight water tank 601, and the connecting plate 603 is fixed at both ends of the detection beam 501 through the docking bolts 502, the pressure on the prefabricated foundation pile 2 can be increased after water is injected into the counterweight water tank 601 to control the prefabricated foundation pile 2. The load value borne by the prefabricated foundation pile 2 is used to detect the sinking of the prefabricated foundation pile 2 under different pressures. At the same time, the downward pressure of the crossbeam 501 will be detected by the pressure sensor 507, and the pointer at the bottom of the dial indicator 3 points to the vertical displacement of the pile body on the reference amount to read the data, thereby testing the compressive capacity of the prefabricated foundation pile 2. After loading and collecting field data in accordance with the corresponding specifications, the vertical load-settlement curve, the settlement-time logarithmic curve, and the settlement-load logarithmic curve can be drawn, and then the compressive bearing capacity of the pile foundation can be determined according to the specifications.

[0030] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A pile structure vertical compressive static load testing machine, comprising a reference measuring frame (1) and a prefabricated foundation pile (2), wherein a magnetic base fixing clamp (4) is fixedly mounted on the reference measuring frame (1), and a dial indicator (3) is fixedly mounted on the magnetic base fixing clamp (4), characterized in that: The upper end of the prefabricated foundation pile (2) is provided with a detection mechanism (5), the detection mechanism (5) comprising a detection beam (501) arranged at the upper end of the prefabricated foundation pile (2), a positioning sleeve (504) being provided at the middle position of the bottom of the detection beam (501), a pressure sensor (507) being provided in the positioning sleeve (504), counterweight mechanisms (6) being connected at both ends of the detection beam (501), the counterweight mechanism (6) comprising connecting plates (603) fixed at both ends of the detection beam (501), a steel wire rope (604) being connected at the bottom of the connecting plate (603), and a counterweight water tank (601) being fixedly mounted on the steel wire rope (604).

2. The pile structure vertical compressive static load testing machine according to claim 1, characterized in that: The detection mechanism (5) further comprises a first connection hole (503) formed at the edges of both ends of the detection beam (501), a docking bolt (502) being provided in the first connection hole (503), a wire notch (508) being formed on the side wall of the positioning sleeve (504), and a data line (506) being connected to the pressure sensor (507).

3. The pile structure vertical compressive static load testing machine according to claim 2, characterized in that: The pressure sensor (507) is provided with anti-skid pads (505) on both the upper and lower surfaces, and the anti-skid pads (505) are fixed on the pressure sensor (507) by glue.

4. The pile structure vertical compressive static load testing machine according to claim 3, characterized in that: The detection beam (501) is connected to the upper end of the prefabricated foundation pile (2) through a positioning sleeve (504); the upper end of the pressure sensor (507) abuts against the bottom of the detection beam (501); the lower end of the pressure sensor (507) abuts against the upper end of the prefabricated foundation pile (2); the data line (506) extends out of the positioning sleeve (504) through a wire notch (508); and the docking bolt (502) is connected to the detection beam (501) through a first connection hole (503).

5. The pile structure vertical compressive static load testing machine according to claim 4, characterized in that: The counterweight mechanism (6) further comprises a water outlet (605) fixed at the lower end of the counterweight water tank (601) and a water inlet (607) fixed at the upper end of the counterweight water tank (601); the water outlet (605) is connected to a sealing end cover (606); the water inlet (607) is connected to a solenoid valve (608); and a second connecting hole (602) is provided on the connecting plate (603).

6. The pile structure vertical compressive static load testing machine according to claim 5, characterized in that: One end of the steel wire rope (604) is fixed on the connecting plate (603), and the other end of the steel wire rope (604) is fixed on the counterweight water tank (601).

7. The pile structure vertical compressive static load testing machine according to claim 6, characterized in that: The butt bolt (502) is connected to the connecting plate (603) via the second connecting hole (602); the first connecting hole (503) on the detection beam (501) is aligned with the second connecting hole (602) on the connecting plate (603) in a vertical direction; and the connecting plate (603) is fixed to both ends of the detection beam (501) via the butt bolt (502).

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