Detection device for pile foundation

Abstract

The invention relates to the technical field of foundation detection, and particularly discloses a pile foundation detection device which comprises two oppositely-arranged supporting piers, two first steel beams are arranged on the two supporting piers in parallel, jacking pieces are arranged on the two first steel beams correspondingly, second steel beams are arranged on the two jacking pieces, and a supporting plate is arranged on the second steel beams. A pull rod is arranged on the supporting plate, a traction shell is arranged at the lower end of the pull rod in a sliding mode, two driving pieces are rotationally arranged in the traction shell, clamping pieces matched with the driving pieces are arranged in the traction shell in a sliding mode, and when the pull rod moves upwards, the two clamping pieces can get close to each other so as to firmly clamp a reinforcing steel bar on a pile foundation, and a supporting piece is coaxially arranged at the upper end of the pull rod in a sliding mode. And two locking pieces are symmetrically arranged on the supporting piece in a sliding mode, the locking pieces are connected with the supporting piece through first elastic pieces, when the two locking pieces enter the inner ring side of the supporting piece, the pull rod and the supporting piece can be locked, and the reinforcing steel bar can be efficiently and conveniently clamped and fixed.

Description

Technical Field

[0001] The present invention relates to the technical field of foundation detection, and in particular to a detection device for pile foundation. Background Art

[0002] The main methods of pile foundation testing include static load test, core drilling method, low strain method, high strain method, and acoustic wave transmission method. Among them, static load test includes single pile vertical static load test, single pile vertical pullout static load test, and single pile horizontal static load test. Among them, the single pile vertical pullout static load test is to apply vertical pullout force step by step on the top of the pile, observe the pullout displacement of the top of the pile over time, so as to determine the corresponding single pile vertical pullout bearing capacity, and judge whether the vertical pullout bearing capacity meets the design requirements, and determine the vertical pullout force of the pile through the pile body strain and displacement test. Therefore, the construction quality of the pullout pile can be visually inspected, including the integrity of the pile body and the combination of the pile and the soil, so as to ensure the safety and stability of the project during use.

[0003] A Chinese patent with announcement number CN117432011B discloses a pile foundation pull-out capacity detection device, including a connecting assembly, a power assembly and a support assembly, wherein the connecting assembly is used to connect the steel bars of the pile foundation to be tested; the power assembly is arranged between the connecting assembly and the pile foundation to be tested and connected to the connecting assembly, and the power assembly is used to apply a load to the pile foundation to be tested through the connecting assembly; the support assembly is arranged below the power assembly and is used to support the power assembly; the connecting assembly includes a casing and a side plate, the casing has an opening at the bottom and a hollow interior, the side plate is arranged in the casing, the steel bars penetrate into the casing from the bottom and are located between the casing and the side plates; a first adjustment assembly is arranged between the casing and the side plates, and the first adjustment assembly is used to adjust the distance between the side plate and the inner side surface of the casing so that the casing and the side plates are close to each other, thereby adjusting the positive pressure between the side plate and the steel bars and between the casing and the steel bars.

[0004] When the above technical solution is used to clamp the steel bars, it is necessary to rotate the nut alternately multiple times with a wrench, so that the U-shaped rod drives the side plate to slide, thereby reducing the distance between the side plate and the inner surface of the casing, thereby clamping the steel bars. This operation process is time-consuming and labor-intensive, and is not convenient for accurately and efficiently clamping and fixing the steel bars. Summary of the invention

[0005] The present invention provides a detection device for pile foundation, aiming to solve the problem in the related art that it is difficult to clamp and fix steel bars efficiently and conveniently.

[0006] The cam is provided with two teeth, and a tooth is connected with the toothed track to form a toothed track, and the toothed track is connected with the toothed track to form a toothed track.

[0007] The present invention provides a pull rod and a clamping member that cooperates with it so that when the pull rod moves upward, the two clamping members can firmly clamp the steel bars on the pile foundation, and the greater the upward pulling force of the pull rod on the steel bars, the greater the clamping force of the clamping member on the steel bars on the pile foundation. In addition, the cooperation between the support member and the locking member enables the pull rod to be firmly fixed on the support plate, which is convenient to operate and efficient in assembly and disassembly.

[0008] Preferably, the driving member is a half gear, and the lower end of the pull rod is rotatably provided with a driving arm that cooperates with the driving member. The end of the driving arm away from the pull rod is rotatably connected to the driving member, and the pull rod can drive the two clamping members to move closer to or away from each other through the cooperation between the driving member and the driving arm.

[0009] Preferably, the clamping member has a rack portion that cooperates with the driving member, and the lower end of the clamping member has a clamping sleeve for clamping the steel bar.

[0010] Preferably, the clamping sleeve is semi-annular and has an anti-slip pattern 1 on the inner ring side of the clamping sleeve. The provision of the anti-slip pattern 1 enables the clamping sleeve to firmly clamp the steel bar and avoid interruption of the pulling force of the pull rod on the steel bar.

[0011] Preferably, the inner ring side of the support member has an inverted conical surface 1, and the outer peripheral side of the locking member has an inverted conical surface 2 matching the conical surface 1. The design of the conical surface 1 and the conical surface 2 enables the pull rod to be stably connected to the support plate.

[0012] Preferably, the side of the locking member that is in compression contact with the pull rod has a second anti-slip pattern.

[0013] Preferably, a guide rod for sliding of the locking member is fixedly provided at the upper end of the support member, and the elastic member 1 is arranged above the locking member. The upper end of the elastic member 1 is fixedly connected to the top of the guide rod, and the lower end of the elastic member 1 is fixedly connected to the locking member. The elastic member 1 always has a downward pushing force on the locking member to facilitate locking of the pull rod and the support member.

[0014] Preferably, a matching groove for installing the pull rod is provided on the support plate, and the radius of the support member is greater than the width of the matching groove.

[0015] Preferably, the pull rod is provided with baffle plate 1 and baffle plate 2, and the support member is located between baffle plate 1 and baffle plate 2.

[0016] Preferably, the lifting member adopts a hydraulic jack, and an anti-slip pad is provided on the top of the telescopic end of the lifting member.

[0017] By adopting the above technical scheme, the beneficial effects of the present invention are as follows: by arranging a support member and a locking member on the pull rod, the pull rod can be easily installed on the support plate, and by installing a clamping member at the lower end of the pull rod, when the pull rod moves upward, the two clamping members can firmly clamp the steel bars on the pile foundation, and the greater the upward pulling force of the pull rod on the steel bars, the greater the clamping force of the clamping member on the steel bars on the pile foundation. The installation and disassembly are convenient and efficient, and by arranging the inclination sensor, the upper end surface of the support plate is always in a horizontal state to ensure that the pulling force applied by the pull rod to the steel bars is always vertically upward, so as to facilitate the smooth detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 It is a schematic structural diagram of the pull rod, traction housing and support member of the present invention.

[0020] Figure 3 It is an exploded view of the support plate, tie rods and pile foundation of the present invention.

[0021] Figure 4 It is a cross-sectional view of the pull rod, the support member and the locking member of the present invention.

[0022] Figure 5 It is a schematic diagram of the cooperation between the supporting member and the locking member when the elastic member 1 of the present invention is compressed.

[0023] Figure 6 It is a schematic diagram of the present invention when two clamping sleeves are away from each other.

[0024] Figure 7 It is a schematic diagram of two clamping sleeves approaching each other according to the present invention.

[0025] Figure 8It is a schematic diagram of the coordination of the pull rod, the driving member and the clamping member of the present invention.

[0026] Figure numerals: 10, supporting pier; 11, steel beam one; 12, lifting member; 13, steel beam two; 14, supporting plate; 141, matching groove; 15, inclination sensor; 20, pulling rod; 201, baffle one; 202, baffle two; 203, driving arm; 21, traction shell; 22, driving member; 23, clamping member; 231, rack portion; 232, clamping sleeve; 233, anti-skid pattern one; 24, supporting member; 241, conical surface one; 242, guide rod; 25, locking member; 251, elastic member one; 252, conical surface two; 253, anti-skid pattern two; 30, steel bar. DETAILED DESCRIPTION

[0027] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0028] refer to Figure 1-Figure 3 A detection device for pile foundation includes two supporting piers 10 arranged opposite to each other, two steel beams 11 are arranged in parallel on the two supporting piers 10, and jacking pieces 12 are arranged on the two steel beams 11 respectively. The jacking pieces 12 adopt hydraulic jacks, and steel beams 13 are arranged on the two jacking pieces 12. Anti-skid pads are arranged on the tops of the telescopic ends of the jacking pieces 12 to avoid relative sliding between the steel beams 13 and the telescopic ends of the jacking pieces 12, so as to improve the accuracy of detection.

[0029] A support plate 14 is provided on the second steel beam 13, and an inclination sensor 15 for detecting the inclination angle of the support plate 14 is installed on the support plate 14. The inclination sensor 15 cooperates with the two jacking members 12. In the initial state, the upper end surface of the support plate 14 is horizontal, and the inclination sensor 15 displays data as zero. When the inclination sensor 15 detects that the data at one end of the support plate 14 close to one of the jacking members 12 fluctuates, it indicates that the support plate 14 is tilted. At this time, the control module can control the telescopic end of the jacking member 12 to move so that the upper end surface of the support plate 14 is restored to a horizontal state again, so as to facilitate the smooth detection.

[0030] refer to Figure 1-Figure 3 as well as Figure 6-Figure 8A pull rod 20 is provided on the support plate 14, and a matching groove 141 for installing the pull rod 20 is opened on the support plate 14. The radius of the support member 24 is greater than the width of the matching groove 141. In this embodiment, three matching grooves 141 are respectively opened at the opposite ends of the support plate 14. A traction shell 21 is slidably provided at the lower end of the pull rod 20. Two driving members 22 are rotatably provided in the traction shell 21. The two driving members 22 are symmetrically arranged about the pull rod 20 in the traction shell 21. The driving member 22 is a half gear. A driving arm 203 that cooperates with the driving member 22 is rotatably provided at the lower end of the pull rod 20. The end of the driving arm 203 away from the pull rod 20 is rotatably connected to the driving member 22. The traction A clamping member 23 that cooperates with the driving member 22 is provided in the shell 21 and slides in the horizontal direction. The clamping member 23 has a rack portion 231 that cooperates with the driving member 22. The lower end of the clamping member 23 has a clamping sleeve 232 for clamping the steel bar 30 on the pile foundation. The clamping sleeve 232 is semi-annular and the inner ring side of the clamping sleeve 232 has an anti-slip pattern 233; when the pull rod 20 moves upward relative to the traction shell 21, the pull rod 20 can drive the two driving members 22 to rotate through the driving arm 203, and then drive the two clamping members 23 to approach each other to achieve clamping of the steel bar 30, wherein the setting of the anti-slip pattern 233 facilitates the clamping member 23 to clamp the steel bar 30 more firmly.

[0031] It can be understood that when the two clamping members 23 are in a clamping state on the steel bar 30, as the vertical pulling force applied to the pull rod 20 continues to increase, the clamping force of the two clamping members 23 on the steel bar 30 will also increase, which will help to avoid the separation of the clamping members 23 and the steel bar 30, thereby facilitating the stable advancement of the detection.

[0032] refer to Figure 1-Figure 5 A support member 24 is coaxially slidably provided on the upper end of the pull rod 20, and two locking members 25 are symmetrically slidably provided on the support member 24. The locking member 25 is connected to the support member 24 through an elastic member 251. In this embodiment, a guide rod 242 for sliding the locking member 25 is fixedly provided on the upper end of the support member 24. The elastic member 251 is arranged above the locking member 25. The upper end of the elastic member 251 is fixedly connected to the top of the guide rod 242, and the lower end of the elastic member 251 is fixedly connected to the locking member 25. The elastic member 251 always has the force to push the locking member 25 downward. A baffle 1 201 and a baffle 2 202 are provided on the pull rod 20. The support member 24 is located between the baffle 1 201 and the baffle 202. The baffle 1 201 is located at the top of the pull rod 20. In the initial state, the support member 24 is close to the baffle 1 201.

[0033] It should be noted that the inner ring side of the support member 24 has an inverted conical surface 241, the outer peripheral side of the locking member 25 has an inverted conical surface 252 that matches the conical surface 241, and the side of the locking member 25 that is in squeeze contact with the pull rod 20 has an anti-slip groove 253. When the two locking members 25 enter the inner ring side of the support member 24, when the pull rod 20 is pulled downward, with the cooperation of the conical surface 1 241 and the conical surface 252, the two locking members 25 can lock the pull rod 20 and the support member 24, and the greater the pulling force applied downward to the pull rod 20, the tighter the locking member 25 locks the pull rod 20 and the support member 24.

[0034] Specific working principle: Reference Figure 1-Figure 8 , install the supporting pier 10, two steel beams 11, two jacking pieces 12, steel beam 2 13, supporting plate 14 and inclination sensor 15 in sequence, and make the supporting plate 14 located directly above the pile foundation, the six matching grooves 141 on the supporting plate 14 correspond to the six steel bars 30 on the pile foundation respectively, and make the inclination sensor 15 display data as zero.

[0035] Taking one of the steel bars 30 on the pile foundation as an example, the inspector holds the pull rod 20 with one hand and places it in the matching groove 141 corresponding to the steel bar 30. At this time, the support member 24 is located above the support plate 14. Then the other hand pushes the traction shell 21 upward relative to the pull rod 20 to make the two clamping members 23 move away from each other, so that the two clamping members 23 can embrace the steel bar 30. Then the other hand breaks away from the contact with the traction shell 21. The traction shell 21 will move downward under the action of its own weight to make the two clamping members 23 approach each other, thereby achieving the clamping of the steel bar 30.

[0036] Then, one hand pulls the pull rod 20 vertically upward so that the two clamping members 23 firmly clamp the steel bar 30, and then the other hand pushes the two locking members 25 upward relative to the support member 24 so that the locking members 25 unlock the pull rod 20 and the support member 24, and move the support member 24 downward until the lower end surface of the support member 24 stops at the upper end surface of the support plate 14, and then the other hand breaks away from the contact with the two locking members 25. At this time, under the action of the elastic member 251, the two locking members 25 enter the inner ring side of the support member 24 and lock the pull rod 20 and the support member 24.

[0037] Next, the remaining five tie rods 20 and the corresponding steel bars 30 are installed in the same manner as above, and then the jacking member 12 is started, so that the jacking member 12 gradually pushes the support plate 14 upward, and the upward thrust of the jacking member 12 is gradually loaded to twice the pull-out bearing capacity of the pile foundation. During the loading process, if the cumulative increase is not greater than the allowable increase, it is qualified. When the inclination sensor 15 detects that the data of one end of the support plate 14 close to one of the jacking members 12 fluctuates, it indicates that the support plate 14 is tilted. At this time, the control module can control the telescopic end of the jacking member 12 to move so that the upper end surface of the support plate 14 returns to a horizontal state again, to ensure that the pulling force applied by the pull rod 20 to the steel bar 30 is always vertically upward, so as to facilitate the smooth progress of the detection. It can be understood that the greater the upward thrust applied by the jacking member 12 to the support plate 14, the greater the clamping force of the two clamping members 23 on the steel bar 30 will also be, and the two locking members 25 will also lock the pull rod 20 and the support member 24 tighter, thereby facilitating the smooth progress of the detection.

[0038] When the inspection is completed, the inspector pushes the two locking members 25 upward relative to the support member 24 with one hand so that the locking members 25 unlock the pull rod 20 and the support member 24, and then moves the support member 24 to the initial position. Then, the inspector holds the traction shell 21 with one hand and pushes the pull rod 20 downward with the other hand to make the two clamping members 23 disengage from the clamping of the steel bar 30, which makes installation and disassembly more convenient.

[0039] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A detection device for a pile foundation, comprising two supporting piers (10) arranged opposite to each other, characterized in that: Two steel beams (11) are arranged in parallel on the two supporting piers (10); lifting members (12) are arranged on the two steel beams (11) respectively; steel beams (13) are arranged on the two lifting members (12); a supporting plate (14) is arranged on the steel beams (13); an inclination sensor (15) for detecting the inclination angle of the supporting plate (14) is installed on the supporting plate (14); the inclination sensor (15) cooperates with the two lifting members (12); The support plate (14) is provided with a pull rod (20), the lower end of the pull rod (20) is slidably provided with a traction shell (21), two driving members (22) are rotatably provided in the traction shell (21), and a clamping member (23) cooperating with the driving member (22) is slidably provided in the traction shell (21). When the pull rod (20) moves upward, the two clamping members (23) can approach each other to achieve a firm clamping of the steel bars (30) on the pile foundation. The upper end of the pull rod (20) is coaxially slidably provided with a support member (24), and two locking members (25) are symmetrically slidably provided on the support member (24). The locking members (25) are connected to the support member (24) through an elastic member (251), and the two locking members (25) can lock the pull rod (20) and the support member (24) when entering the inner ring side of the support member (24).

2. A pile foundation detection device according to claim 1, characterized in that: The driving member (22) is a half gear, and a driving arm (203) cooperating with the driving member (22) is rotatably provided at the lower end of the pull rod (20), and one end of the driving arm (203) away from the pull rod (20) is rotatably connected to the driving member (22).

3. A pile foundation detection device according to claim 2, characterized in that: The clamping member (23) has a rack portion (231) that cooperates with the driving member (22), and the lower end of the clamping member (23) has a clamping sleeve (232) for clamping the steel bar (30).

4. A pile foundation detection device according to claim 3, characterized in that: The clamping sleeve (232) is semi-annular in shape, and the inner ring side of the clamping sleeve (232) has an anti-slip pattern (233).

5. A pile foundation detection device according to claim 1, characterized in that: The inner ring side of the support member (24) has an inverted conical surface 1 (241), and the outer peripheral side of the locking member (25) has an inverted conical surface 2 (252) matching the conical surface 1 (241).

6. A pile foundation detection device according to claim 1, characterized in that: The side of the locking piece (25) that is in press contact with the pull rod (20) has a second anti-slip pattern (253).

7. A pile foundation detection device according to claim 1, characterized in that: A guide rod (242) for sliding the locking member (25) is fixedly provided at the upper end of the support member (24), the elastic member 1 (251) is arranged above the locking member (25), the upper end of the elastic member 1 (251) is fixedly connected to the top of the guide rod (242), and the lower end of the elastic member 1 (251) is fixedly connected to the locking member (25).

8. A pile foundation detection device according to claim 1, characterized in that: The support plate (14) is provided with a matching groove (141) for installing the pull rod (20), and the radius of the support member (24) is greater than the width of the matching groove (141).

9. A pile foundation detection device according to claim 1, characterized in that: The pull rod (20) is provided with a baffle plate 1 (201) and a baffle plate 2 (202), and the support member (24) is located between the baffle plate 1 (201) and the baffle plate 2 (202).

10. A pile foundation detection device according to claim 1, characterized in that: The lifting member (12) adopts a hydraulic jack, and an anti-slip pad is arranged on the top of the telescopic end of the lifting member (12).

Images