A pile head protection device for concrete cast-in-place pile static load test

Abstract

The present invention discloses a pile head protection device for static load test of concrete bored piles, comprising a sleeve, a mounting box and a sliding bracket, a No. 1 sliding groove is provided through both ends of the top of the sleeve, and a compression spring is installed at one end of the No. 1 sliding groove by screws, and a paddle is installed at one end of the compression spring by screws, a mounting box is installed on one side of the sleeve by bolts, a pressure transmitter is provided on one side of the mounting box by a mounting member, a recorder is provided on one side of the pressure transmitter by a protective shell, a level ruler is installed on both sides of the bottom end of the sleeve by screws, a docking plate is welded on the outer periphery of the bottom of the sleeve, a No. 2 sliding groove is provided through both sides of the docking plate, and a mounting plate corresponding to the docking plate is provided on the top of the sliding bracket. The novel pile head protection device for static load test has various functions, significant protection effect, low cost, easy production, meets various needs in use, and is suitable for wide promotion and use.

Description

Technical Field

[0001] The invention relates to the technical field of building tests, in particular to a pile head protection device used for static load tests of concrete cast-in-place piles. Background Art

[0002] The static load test of pile foundation is a technology used in engineering to detect the bearing capacity of pile foundation. It is currently the most accurate and reliable test method for determining the ultimate bearing capacity of a single pile. As a basis for determining whether a certain dynamic load test method is mature, the comparison error of the static load test results is used. The existing static load test requires the use of a pile head protection device. The pile head protection device currently used cannot monitor the changes in the surface morphology of the pile head and has poor protection performance. Therefore, we propose a pile head protection device for static load tests of concrete cast-in-place piles. Summary of the invention

[0003] The main purpose of the present invention is to provide a pile head protection device for static load tests of concrete bored piles. Eight groups of pressure sensors are specifically arranged, and the sensing end of the pressure sensor is located on the contact head. When the local shape of the pile head of the pile foundation changes under the action of pressure, the pressure sensor transmits the pressure value to the pressure transmitter at the first time. The pressure parameter of the pressure transmitter is converted into a standard electrical signal to be supplied to a recorder for recording and analysis, so that the stability of the pile head can be grasped at all times. The safety protection effect is significant, the degree of intelligence is high, and the problems in the background technology can be effectively solved.

[0004] To achieve the above object, the technical solution adopted by the present invention is:

[0005] A pile head protection device for static load test of concrete cast-in-place piles comprises a sleeve, a mounting box and a sliding bracket, wherein two ends of the top of the sleeve are penetrated with a No. 1 sliding groove, and a compression spring is installed at one end of the No. 1 sliding groove by screws, and a paddle is installed at one end of the compression spring by screws, a mounting box is installed at one side of the sleeve by bolts, a pressure transmitter is arranged at one side of the mounting box by a mounting member, a recorder is arranged at one side of the pressure transmitter by a protective shell, a level ruler is installed at both sides of the bottom end of the sleeve by screws, a docking plate is welded at the bottom periphery of the sleeve, a No. 2 sliding groove is penetrated at both sides of the docking plate, a mounting plate corresponding to the docking plate is arranged at the top of the sliding bracket, and the mounting plate and the docking plate are fixed by tension bolts, the sleeve is sleeved on the periphery of the pile foundation, a rubber plate is installed at the inner side of the sliding bracket by bolts, a mounting groove is arranged in the rubber plate, a pressure sensor is installed in the mounting groove by bolts, a contact head is arranged at the inner side of the rubber plate, and an anti-corrosion layer is arranged on the outer surface of the sleeve.

[0006] Furthermore, a power storage box is installed on one side of the inner wall of the installation box by screws, and the recorder, the pressure transmitter and the warning light are electrically connected to the power storage box.

[0007] Furthermore, one side of the installation box is connected with a side door via a damping shaft.

[0008] Furthermore, the sensing end of the pressure sensor is located on the contact head, and the contact head is in contact with the pile foundation, and the pressure sensor is specifically provided in eight groups.

[0009] Furthermore, the pressure sensor and the recorder are electrically connected to the pressure transmitter, and a timer is installed on the top of the installation box by bolts.

[0010] Furthermore, a warning light is provided on one side of the sleeve through a fixing seat, a limiting clamp is welded to the bottom end of the paddle, and a rubber pad is clamped between the limiting clamps, and the rubber pad is located between the pile foundation and the sleeve.

[0011] Furthermore, the anti-corrosion layer is a titanium metal anti-corrosion coating, and the top welding portion of the sleeve is provided with reinforcing ribs.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. There are eight groups of pressure sensors, and the sensing end of the pressure sensor is located on the contact head. When the local shape of the pile head changes under the action of pressure, the pressure sensor transmits the pressure value to the pressure transmitter at the first time. The pressure parameter of the pressure transmitter is converted into a standard electrical signal to supply the recorder for recording and analysis, so as to always grasp the stability of the pile head, with significant safety protection effect and high degree of intelligence.

[0014] 2. The timer can be used to time the time the pile foundation bears the load, reminding the test personnel to record the data and improve the accuracy of the test. When installing the sleeve, it is convenient to grasp the horizontal condition of the sleeve by looking at the level ruler. When it tilts, it should be adjusted in time to improve the uniformity of the pile foundation force and make the test data more representative.

[0015] 3. When testing pile foundations of different diameters, use the tension bolts to slide in the No. 2 sliding groove, adjust the distance between the sliding brackets, and make the contact head fit against the surface of the pile foundation for easy monitoring.

[0016] 4. The anti-corrosion layer is a titanium metal anti-corrosion coating, which is anti-oxidation and has significant anti-corrosion effect. The coating has high strength, is durable, and is not easy to peel off, thereby increasing the service life of the sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1The present invention is a schematic diagram of the overall structure of a pile head protection device for a static load test of a concrete bored pile.

[0018] Figure 2 The present invention is a schematic diagram of a docking plate structure of a pile head protection device for a static load test of a concrete cast-in-place pile.

[0019] Figure 3 The present invention is a top view of a sleeve of a pile head protection device used for a static load test of a concrete cast-in-place pile.

[0020] Figure 4 The present invention is a schematic diagram of the structure of an electric storage box for a pile head protection device used in a static load test of a concrete cast-in-place pile.

[0021] Figure 5 The present invention is a schematic diagram of the structure of an anti-corrosion layer of a pile head protection device used for a static load test of a concrete bored pile.

[0022] In the figure: 1. Anti-corrosion layer; 2. Limit clamp; 3. Warning light; 4. Paddle; 5. Sliding groove No. 1; 6. Sleeve; 7. Mounting box; 8. Timer; 9. Recorder; 10. Pressure transmitter; 11. Side door; 12. Level; 13. Docking plate; 14. Sliding bracket; 15. Rubber sheet; 16. Mounting groove; 17. Pressure sensor; 18. Contact head; 19. Sliding groove No. 2; 20. Tension bolt; 21. Reinforcement rib; 22. Compression spring; 23. Battery box. DETAILED DESCRIPTION

[0023] 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 explained below in conjunction with specific implementation methods.

[0024] Embodiment 1

[0025] like Figure 1-5As shown, a pile head protection device for static load test of concrete bored piles includes a sleeve 6, a mounting box 7 and a sliding bracket 14, wherein the top two ends of the sleeve 6 are penetrated with a No. 1 sliding groove 5, and a compression spring 22 is installed at one end of the No. 1 sliding groove 5 by screws, and a paddle 4 is installed at one end of the compression spring 22 by screws, a mounting box 7 is installed at one side of the sleeve 6 by bolts, a pressure transmitter 10 is provided at one side of the mounting box 7 by a mounting piece, a recorder 9 is provided at one side of the pressure transmitter 10 by a protective shell, and a level ruler 12 is installed at both sides of the bottom end of the sleeve 6 by screws. A docking plate 13 is welded to the periphery of the bottom of the sleeve 6, and No. 2 sliding grooves 19 are penetrated on both sides of the docking plate 13. A mounting plate corresponding to the docking plate 13 is provided on the top of the sliding bracket 14, and the mounting plate and the docking plate 13 are fixed by tension bolts 20. The sleeve 6 is sleeved on the periphery of the pile foundation, and a rubber plate 15 is installed on the inner side of the sliding bracket 14 by bolts. A mounting groove 16 is provided in the rubber plate 15, and a pressure sensor 17 is installed in the mounting groove 16 by bolts. A contact head 18 is provided on the inner side of the rubber plate 15, and the outer layer of the sleeve 6 is provided with an anti-corrosion layer 1.

[0026] A power storage box 23 is installed on one side of the inner wall of the installation box 7 by screws, and the recorder 9, the pressure transmitter 10 and the warning light 3 are electrically connected to the power storage box 23.

[0027] In this embodiment, Figure 1 , 4 As shown, the power storage box 23 can supply power to the recorder 9 , the pressure transmitter 10 and the warning light 3 .

[0028] One side of the installation box 7 is connected to a side door 11 via a damping shaft.

[0029] In this embodiment, Figure 1 As shown, the side door 11 is used to facilitate opening and closing of the installation box 7.

[0030] The sensing end of the pressure sensor 17 is located on the contact head 18 , and the contact head 18 is in contact with the pile foundation. Specifically, eight groups of the pressure sensor 17 are provided.

[0031] The pressure sensor 17 and the recorder 9 are electrically connected to the pressure transmitter 10 , and a timer 8 is installed on the top of the installation box 7 by bolts.

[0032] In this embodiment, Figure 1 As shown, when the local shape of the pile head changes under the action of pressure, the pressure sensor 17 immediately transmits the pressure value to the pressure transmitter 10, and the pressure transmitter 10 converts the pressure parameter into a standard electrical signal to be supplied to the recorder 9 for recording and analysis.

[0033] Among them, a warning light 3 is provided on one side of the sleeve 6 through a fixing seat, a limiting clamp 2 is welded to the bottom end of the paddle 4, and a rubber pad is clamped between the limiting clamps 2, and the rubber pad is located between the pile foundation and the sleeve 6.

[0034] In this embodiment, Figure 1 As shown, the rubber pad can protect the top of the pile foundation and facilitate compaction.

[0035] The anti-corrosion layer 1 is a titanium metal anti-corrosion coating, and a reinforcing rib 21 is provided at the top welding portion of the sleeve 6 .

[0036] In this embodiment, Figure 1 , 3 As shown in Figures 5 and 5, the reinforcing ribs 21 can improve the overall rigidity, strength and stability of the sleeve 6; the anti-corrosion layer 1 is a titanium metal anti-corrosion coating, which is anti-oxidant and has a significant anti-corrosion effect. The coating has high strength, is durable, and is not easy to peel off, thereby increasing the service life of the sleeve 6.

[0037] Embodiment 2

[0038] like Figure 1-5 As shown, a pile head protection device for static load test of concrete bored piles includes a sleeve 6, a mounting box 7 and a sliding bracket 14, wherein the top two ends of the sleeve 6 are penetrated with a No. 1 sliding groove 5, and a compression spring 22 is installed at one end of the No. 1 sliding groove 5 by screws, and a paddle 4 is installed at one end of the compression spring 22 by screws, a mounting box 7 is installed at one side of the sleeve 6 by bolts, a pressure transmitter 10 is provided at one side of the mounting box 7 by a mounting piece, a recorder 9 is provided at one side of the pressure transmitter 10 by a protective shell, and a level ruler 12 is installed at both sides of the bottom end of the sleeve 6 by screws. A docking plate 13 is welded to the periphery of the bottom of the sleeve 6, and No. 2 sliding grooves 19 are penetrated on both sides of the docking plate 13. A mounting plate corresponding to the docking plate 13 is provided on the top of the sliding bracket 14, and the mounting plate and the docking plate 13 are fixed by tension bolts 20. The sleeve 6 is sleeved on the periphery of the pile foundation, and a rubber plate 15 is installed on the inner side of the sliding bracket 14 by bolts. A mounting groove 16 is provided in the rubber plate 15, and a pressure sensor 17 is installed in the mounting groove 16 by bolts. A contact head 18 is provided on the inner side of the rubber plate 15, and the outer layer of the sleeve 6 is provided with an anti-corrosion layer 1.

[0039] A power storage box 23 is installed on one side of the inner wall of the installation box 7 by screws, and the recorder 9, the pressure transmitter 10 and the warning light 3 are electrically connected to the power storage box 23.

[0040] In this embodiment, Figure 1 , 4As shown, the power storage box 23 can supply power to the recorder 9 , the pressure transmitter 10 and the warning light 3 .

[0041] One side of the installation box 7 is connected to a side door 11 via a damping shaft.

[0042] In this embodiment, Figure 1 As shown, the side door 11 is used to facilitate opening and closing of the installation box 7.

[0043] The sensing end of the pressure sensor 17 is located on the contact head 18 , and the contact head 18 is in contact with the pile foundation. Specifically, eight groups of the pressure sensor 17 are provided.

[0044] The pressure sensor 17 and the recorder 9 are electrically connected to the pressure transmitter 10 , and a timer 8 is installed on the top of the installation box 7 by bolts.

[0045] In this embodiment, Figure 1 As shown, when the local shape of the pile head changes under the action of pressure, the pressure sensor 17 immediately transmits the pressure value to the pressure transmitter 10, and the pressure transmitter 10 converts the pressure parameter into a standard electrical signal to be supplied to the recorder 9 for recording and analysis.

[0046] Among them, a warning light 3 is provided on one side of the sleeve 6 through a fixing seat, a limiting clamp 2 is welded to the bottom end of the paddle 4, and an ABS plastic pad is clamped between the limiting clamps 2, and the ABS plastic pad is located between the pile foundation and the sleeve 6.

[0047] In this embodiment, Figure 1 As shown, the ABS plastic pad can protect the top of the pile foundation and facilitate compaction.

[0048] The anti-corrosion layer 1 is a titanium metal anti-corrosion coating, and a reinforcing rib 21 is provided at the top welding portion of the sleeve 6 .

[0049] In this embodiment, Figure 1 , 3 As shown in Figures 5 and 5, the reinforcing ribs 21 can improve the overall rigidity, strength and stability of the sleeve 6; the anti-corrosion layer 1 is a titanium metal anti-corrosion coating, which is anti-oxidant and has a significant anti-corrosion effect. The coating has high strength, is durable, and is not easy to peel off, thereby increasing the service life of the sleeve 6.

[0050] It should be noted that the present invention is a pile head protection device for static load tests of concrete bored piles. When working, eight groups of pressure sensors 17 are specifically arranged, and the sensing end of the pressure sensor 17 is located on the contact head 18. When the local shape of the pile head changes under the action of pressure, the pressure sensor 17 immediately transmits the pressure value to the pressure transmitter 10 (a product of Jiangsu Chuanghui Automation Instrument Co., Ltd.). The pressure parameter of the pressure transmitter 10 is converted into a standard electrical signal (such as 4-20mADC, etc.) to supply the recorder 9 (a product of Shenzhen Yiji Instrument Co., Ltd.) for recording and analysis, so as to always grasp the stability of the pile head, with significant safety protection effect and high degree of intelligence; turning on the timer 8 is convenient for timing the time the pile foundation bears the load, reminding the test personnel to record data, and improving the accuracy of the test. When installing the sleeve 6, it is convenient to grasp the horizontal condition of the sleeve 6 by observing the spirit level 12 (a product of Shenzhen STABILA Measuring Tools Co., Ltd.). When tilting occurs, it should be adjusted in time to improve the uniformity of the force on the pile foundation and make the test data more representative; when testing pile foundations of different diameters, the tension bolts 20 are used to slide in the No. 2 sliding groove 19, and the distance between the sliding brackets 14 is adjusted to make the contact head 18 fit with the surface of the pile foundation for easy monitoring; the anti-corrosion layer 1 is a titanium metal anti-corrosion coating, which is anti-oxidation and has significant anti-corrosion effect. The coating has high strength, is durable, and is not easy to peel off, thereby increasing the service life of the sleeve 6.

[0051] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A pile head protection device for a static load test of a concrete bored pile, comprising a sleeve (6), a mounting box (7) and a sliding bracket (14), characterized in that: A No. 1 sliding groove (5) is provided at both ends of the top of the sleeve (6), and a compression spring (22) is installed at one end of the No. 1 sliding groove (5) by screws, and a paddle (4) is installed at one end of the compression spring (22) by screws. A mounting box (7) is installed on one side of the sleeve (6) by bolts, and a pressure transmitter (10) is provided on one side of the mounting box (7) by a mounting member, and a recorder (9) is provided on one side of the pressure transmitter (10) by a protective shell. Level rulers (12) are installed on both sides of the bottom end of the sleeve (6) by screws. A docking plate (13) is welded to the outer periphery of the bottom of the sleeve (6), and No. 2 sliding grooves (19) are provided on both sides of the docking plate (13). A mounting plate corresponding to the docking plate (13) is provided on the top of the sliding bracket (14), and the mounting plate and the docking plate (13) are connected by pulling. The sleeve (6) is fixed with bolts (20), the sleeve (6) is sleeved on the periphery of the pile foundation, a rubber plate (15) is installed on the inner side of the sliding bracket (14) through bolts, a mounting groove (16) is arranged in the rubber plate (15), a pressure sensor (17) is installed in the mounting groove (16) through bolts, a contact head (18) is arranged on the inner side of the rubber plate (15), an anti-corrosion layer (1) is arranged on the outer surface of the sleeve (6), the sensing end of the pressure sensor (17) is located on the contact head (18), and the contact head (18) is in contact with the pile foundation, and the pressure sensor (17) is specifically provided with eight groups, a warning light (3) is arranged on one side of the sleeve (6) through a fixing seat, a limiting clamp (2) is welded to the bottom end of the paddle (4), and a rubber pad is clamped between the limiting clamps (2), and the rubber pad is located between the pile foundation and the sleeve (6).

2. The pile head protection device for static load test of concrete bored pile according to claim 1, characterized in that: A power storage box (23) is installed on one side of the inner wall of the installation box (7) by means of screws, and the recorder (9), the pressure transmitter (10) and the warning light (3) are electrically connected to the power storage box (23).

3. The pile head protection device for static load test of concrete bored pile according to claim 1, characterized in that: One side of the installation box (7) is connected to a side door (11) via a damping shaft.

4. The pile head protection device for static load test of concrete bored pile according to claim 1, characterized in that: The pressure sensor (17) and the recorder (9) are electrically connected to the pressure transmitter (10), and a timer (8) is installed on the top of the installation box (7) by means of bolts.

5. The pile head protection device for static load test of concrete bored pile according to claim 1, characterized in that: The anti-corrosion layer (1) is a titanium metal anti-corrosion coating, and a top welding portion of the sleeve (6) is provided with reinforcing ribs (21).

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