CN114215126A - Static load test device for pile foundation detection - Google Patents
Static load test device for pile foundation detection Download PDFInfo
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- CN114215126A CN114215126A CN202210013387.9A CN202210013387A CN114215126A CN 114215126 A CN114215126 A CN 114215126A CN 202210013387 A CN202210013387 A CN 202210013387A CN 114215126 A CN114215126 A CN 114215126A
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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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Abstract
The invention relates to the technical field of pile foundation detection, in particular to a static load test device for pile foundation detection, which is convenient for integrally moving a return beam and a support wall, is beneficial to quickly building a test platform on site and improving the pile foundation test efficiency; the method comprises the following steps: the anti-drop device is arranged between the return beam and the two groups of support walls, and a top pile is fixedly arranged at the position of the return beam opposite to the pile foundation; the jack is fixed at the top end of the pile foundation and is matched with the pile foundation to carry out a return force static load experiment on the pile foundation; the anti-falling device is used for removing the effect of the two groups of supporting walls on the returning beam along the vertical direction during testing, and after the test is completed, the two groups of supporting walls are fixedly connected with the returning beam.
Description
Technical Field
The invention relates to the technical field of pile foundation detection, in particular to a static load test device for pile foundation detection.
Background
The static load test of the pile foundation is a technology for detecting the bearing capacity of the pile foundation in engineering. In the aspect of determining the ultimate bearing capacity of a single pile, the method is the most accurate and reliable test method, and is used for judging whether a certain dynamic load test method is mature or not, and the comparison error of static load test results is taken as the basis;
pile loading method is often adopted in static load test of pile foundation, that is, a counter weight unit is piled on a return beam of a pile top, the two sides of a platform are provided with supporting walls, and the platform is gradually jacked up by a jack placed on a pile head, so that force is applied to a pile body;
the existing device usually needs to temporarily build a support wall and a return beam on site in a test preparation stage, which wastes construction time and causes low test efficiency.
Disclosure of Invention
In order to solve the technical problems, the invention provides the static load test device for pile foundation detection, which is convenient for integrally moving the return beam and the support wall, is beneficial to quickly building a test platform on site and improving the pile foundation test efficiency.
The invention relates to a static load test device for pile foundation detection, which comprises:
the anti-drop device comprises a return beam and two groups of supporting walls, wherein the return beam is used for bearing a balance weight unit for a test, the two groups of supporting walls are symmetrically arranged at the bottoms of two ends of the return beam and are used for supporting the return beam, an anti-drop device is arranged between the return beam and the two groups of supporting walls, and a top pile is fixedly arranged at the position, opposite to a pile foundation, of the return beam;
the jack is fixed at the top end of the pile foundation and is matched with the pile foundation to carry out a return force static load experiment on the pile foundation;
the anti-falling device is used for relieving the action of the two groups of supporting walls on the returning beam along the vertical direction during testing, and the two groups of supporting walls are fixedly connected with the returning beam after the testing is finished.
Furthermore, the anti-falling device comprises a driving plate which is slidably mounted at the lower end of the return beam and a limiting device which is mounted inside the supporting wall, a wedge-shaped push plate is fixedly arranged at one end, close to the supporting wall, of the driving plate, the wedge-shaped push plate is used for triggering the limiting device, two groups of first fixing seats are symmetrically arranged at the bottom end of the return beam relative to the driving plate, two groups of second fixing seats are arranged on the wedge-shaped push plate corresponding to the two groups of first fixing seats, and a first spring is connected and mounted between the first fixing seat and the second fixing seat on the same side;
the pile driving device is characterized in that a stepped groove is formed in the top pile, the diameter of the bottom of the stepped groove is larger than that of the top of the stepped groove, notches for a transmission plate to slide through are arranged on two sides of the top pile in a penetrating mode, a matching inclined plane is arranged at one end, extending into the top pile, of the transmission plate, a transmission rod is movably arranged in the stepped groove, a limiting ring is arranged on the outer wall of the transmission rod, a retainer ring is sleeved on the outer wall of the transmission rod and fixedly installed at the stepped position of the stepped groove to prevent the transmission rod from sliding down from the stepped groove, a second spring is sleeved on the circumferential outer wall of the transmission rod, and the second spring is located between the retainer ring and the top end of the stepped groove;
the top end of the transmission rod is provided with a conical surface corresponding to the matching inclined surface on the transmission plate, the limiting device is used for relieving the action of the two groups of support walls on the force returning beam along the vertical direction after being triggered by the wedge-shaped push plate, and the two groups of support walls are fixedly connected with the force returning beam after the wedge-shaped push plate is far away from the limiting device.
Furthermore, the limiting device comprises a U-shaped connecting rod and a mounting plate which are fixedly mounted at the bottom end of the return beam, the supporting wall is hollow, a guide post and two sets of limiting posts are arranged on the mounting plate, through holes for the guide post and the two sets of limiting posts to pass through are arranged on the side wall of the supporting wall in a penetrating manner, a convex ring is arranged on the circumferential outer wall of the guide post in the supporting wall, a third spring is sleeved on the guide post, the third spring is positioned between the convex ring and the supporting wall, and one end, far away from the mounting plate, of the guide post penetrates through the supporting wall to extend out of the inner side of the supporting wall and is in abutting contact with the wedge-shaped push plate;
the top of the supporting wall is provided with a guide hole for the vertical section of the U-shaped connecting rod to movably penetrate, and two groups of vertical sections on the U-shaped connecting rod are provided with positioning holes in a penetrating mode along the radial direction and used for inserting two groups of limiting columns.
Furthermore, the end face of the convex ring, which is contacted with the wedge-shaped push plate, is rotatably provided with a roller, and the roller is in rolling contact with the wedge-shaped push plate.
Furthermore, the ground grabbing device comprises a hydraulic cylinder fixedly mounted on the outer wall of the support wall and a first connecting rod slidably mounted inside the support wall, sliding chutes are arranged on the outer walls of the wide sides of the support wall in a penetrating mode, strip-shaped holes are arranged on the outer walls of the two groups of narrow sides of the support wall in a penetrating mode, and the strip-shaped holes are parallel to the sliding chutes;
the support wall comprises a support wall and is characterized in that first connecting rods are slidably mounted in two groups of strip-shaped holes, connecting arms are fixedly arranged in the middle of the first connecting rods and fixedly connected with the output end of a hydraulic cylinder, connecting shafts are arranged at two ends, extending out of the outside, of the first connecting rods, inserting plates are rotatably mounted on each group of connecting shafts, limiting plates for limiting the inserting plates to move in the vertical direction are fixedly arranged on the outer wall of the narrow side of the support wall, jacking blocks are slidably mounted at the bottoms of the strip-shaped holes in each group, and the jacking blocks are used for extending out of two sides of the support wall when the inserting plates move below the limiting plates and supporting the two groups of inserting plates to be splayed;
and the driving device is arranged at the bottom of the supporting wall and used for driving the two groups of jacking blocks to synchronously extend outwards when the inserting plate moves to the position below the limiting plate.
Further, drive arrangement includes base and the inside clamp plate of slidable mounting at the knee wall of fixed mounting bottom, the both sides of base are all rotated and are installed the connecting rod, the both sides of clamp plate are all rotated and are installed two sets of connecting rods, are located two sets of connecting rods rotation connection of base and clamp plate homonymy, and fixed mounting has the fourth spring between base and the clamp plate, the junction of the two sets of connecting rods of homonymy is used for promoting two sets of kicking blocks and outwards removes.
Furthermore, every group the inside cover of first spring has inserted the telescopic link, the both ends of telescopic link respectively with second fixing base and first fixing base fixed connection, the axis of telescopic link is on a parallel with driving plate moving path.
Furthermore, a centering chuck is arranged at the bottom of the jack and used for fixing the jack on the top end of the pile foundation and enabling the axis of the output end of the jack to be collinear with the axis of the pile foundation.
Compared with the prior art, the invention has the beneficial effects that: through with jack fixed mounting at pile foundation top, and pile up the counter weight unit that the precalculation is good above the power of returning roof beam, and make two sets of knee walls fix on ground, the counter weight unit who piles up power of returning roof beam and its top supports, when needs are tested, start the jack, make the jack top jack tightly push up the stake, under two sets of anti-disengaging device's transmission, remove two sets of knee walls and act on the power of returning the roof beam along vertical direction, the power of returning the roof beam this moment receives on the pile foundation of thrust ability full play of jack, after the experiment is accomplished, the jack keeps away from the stub, make two sets of anti-disengaging device reset, thereby make the power of returning roof beam reset, the power of returning roof beam and knee wall fixed connection once more this moment, be convenient for moving back roof beam and knee wall, be favorable to the on-the-spot quick test platform of putting up, promote pile foundation test efficiency.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an axial schematic view of the present invention;
FIG. 3 is a structural cross-sectional view of the present invention;
FIG. 4 is an enlarged view of the structure of portion A of FIG. 2;
FIG. 5 is an enlarged view of the structure of the portion B in FIG. 3;
FIG. 6 is an exploded view of the structure of the return beam and the positioning hole;
FIG. 7 is an enlarged view of the guide post in structural connection with a third spring or the like;
FIG. 8 is an enlarged view of the base in structural connection with a fourth spring or the like;
in the drawings, the reference numbers: 1. a return beam; 2. pile jacking; 3. a jack; 4. a pile foundation; 5. a support wall; 6. an anti-drop device; 7. a ground grasping device; 8. a drive plate; 9. a wedge-shaped push plate; 10. a first fixed seat; 11. a second fixed seat; 12. a first spring; 13. a telescopic rod; 14. a transmission rod; 15. a limiting ring; 16. a retainer ring; 17. a second spring; 18. a guide hole; 19. a U-shaped connecting rod; 20. positioning holes; 21. mounting a plate; 22. a guide post; 23. a limiting column; 24. a convex ring; 25. a third spring; 26. a roller; 27. a through hole; 28. a strip-shaped hole; 29. a hydraulic cylinder; 30. a chute; 31. a first connecting rod; 32. a connecting arm; 33. a connecting shaft; 34. inserting plates; 35. a limiting plate; 36. a top block; 37. a base; 38. a connecting rod; 39. pressing a plate; 40. and a fourth spring.
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.
In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like are based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. This embodiment is written in a progressive manner.
As shown in fig. 1 to 3, the static load test apparatus for pile foundation detection according to the present invention includes:
the device comprises a return beam 1 and two groups of supporting walls 5, wherein the return beam 1 is used for bearing a balance weight unit for a test, the two groups of supporting walls 5 are symmetrically arranged at the bottoms of two ends of the return beam 1 and are used for supporting the return beam 1, an anti-falling device 6 is arranged between the return beam 1 and the two groups of supporting walls 5, and a top pile 2 is fixedly arranged at the position, opposite to a pile foundation 4, of the return beam 1;
the jack 3 is fixed at the top end of the pile foundation 4 and is matched with the jacking pile 2 to carry out a return force static load experiment on the pile foundation 4;
the ground grabbing devices 7 are arranged at the bottom ends of the two groups of supporting walls 5 and used for fixing the supporting walls 5 on the ground, the anti-falling devices 6 are used for relieving the action of the two groups of supporting walls 5 on the force of the return beam 1 in the vertical direction during testing, and after the testing is finished, the two groups of supporting walls 5 are fixedly connected with the force return beam 1;
in the embodiment, the jack 3 is fixedly installed at the top of the pile foundation 4, the pre-calculated counterweight unit is stacked above the return beam 1, the two groups of supporting walls 5 are fixed on the ground, the return beam 1 and the counterweight unit stacked above the return beam 1 are supported, when a test is required, the jack 3 is started to enable the jack 3 to tightly support the pile 2, the action of the two groups of supporting walls 5 on the return beam 1 along the vertical direction is relieved under the transmission action of the two groups of anti-falling devices 6, the return beam 1 can be completely acted on the pile foundation 4 under the thrust of the jack 3, after the test is completed, the jack 3 is far away from the pile 2, the two groups of anti-falling devices 6 are reset, so that the return beam 1 is reset, the return beam 1 is fixedly connected with the supporting walls 5 again, the return beam 1 and the supporting walls 5 are convenient to integrally move, and a test platform can be conveniently built on site, the pile foundation test efficiency is improved.
As a preferred option of the above technical solution, as shown in fig. 4 to 5, the anti-disengaging device 6 includes a driving plate 8 slidably mounted at the lower end of the returning beam 1 and a limiting device mounted inside the supporting wall 5, a wedge-shaped push plate 9 is fixedly disposed at one end of the driving plate 8 close to the supporting wall 5, the wedge-shaped push plate 9 is used for triggering the limiting device, two sets of first fixing seats 10 are symmetrically disposed at the bottom end of the returning beam 1 with respect to the driving plate 8, two sets of second fixing seats 11 are disposed on the wedge-shaped push plate 9 corresponding to the two sets of first fixing seats 10, and a first spring 12 is connected and mounted between the first fixing seats 10 and the second fixing seats 11 on the same side;
a stepped groove is formed in the top pile 2, the diameter of the bottom of the stepped groove is larger than that of the top of the stepped groove, notches for the transmission plate 8 to slide through are formed in two sides of the top pile 2 in a penetrating mode, a matching inclined plane is arranged at one end, extending into the top pile 2, of the transmission plate 8, a transmission rod 14 is movably installed in the stepped groove, a limiting ring 15 is arranged on the outer wall of the transmission rod 14, a retainer ring 16 is sleeved on the outer wall of the transmission rod 14 and fixedly installed at the stepped position of the stepped groove and used for preventing the transmission rod 14 from sliding down from the stepped groove, a second spring 17 is sleeved on the circumferential outer wall of the transmission rod 14, and the second spring 17 is located between the retainer ring 16 and the top end of the stepped groove;
the top end of the transmission rod 14 is provided with a conical surface corresponding to the matching inclined surface on the transmission plate 8, the limiting device is used for relieving the action of the two groups of support walls 5 on the force of the return beam 1 along the vertical direction after being triggered by the wedge-shaped push plate 9, and the two groups of support walls 5 are fixedly connected with the return beam 1 after the wedge-shaped push plate 9 is far away from the limiting device;
in this embodiment, through being provided with transfer line 14 and second spring 17 inside pile 2, and set up the ladder groove, make the output of jack 3 can upwards promote transfer line 14 certain distance, and under the conical surface effect on cooperation inclined plane on the driving plate 8 and transfer line 14 top, make two sets of driving plates 8 move to both sides, and cooperate stop device, relieve the fixed connection between knee wall 5 and the back-force roof beam 1, and after the transfer line 14 was kept away from to the output of jack 3, under the effect of respective first spring 12, make two sets of driving plates 8 reset, thereby knee wall 5 and back-force roof beam 1 fixed connection once more, and with the fixed connection mode between control back-force roof beam 1 and knee wall 5, improve the practicality.
Preferably, as shown in fig. 6 to 7, the limiting device includes a U-shaped connecting rod 19 and a mounting plate 21 fixedly mounted at the bottom end of the return beam 1, the support wall 5 is hollow, a guide post 22 and two sets of limiting posts 23 are disposed on the mounting plate 21, a through hole 27 for the guide post 22 and the two sets of limiting posts 23 to pass through is disposed on the side wall of the support wall 5, a convex ring 24 is disposed on the circumferential outer wall of the guide post 22 located inside the support wall 5, a third spring 25 is sleeved on the guide post 22, the third spring 25 is located between the convex ring 24 and the support wall 5, and one end of the guide post 22, which is far away from the mounting plate 21, passes through the support wall 5 and extends to the inner side of the support wall 5 and is in tight contact with the wedge-shaped push plate 9;
the top of the support wall 5 is provided with a guide hole 18 for movably penetrating the vertical section of the U-shaped connecting rod 19, and two groups of vertical sections on the U-shaped connecting rod 19 are radially penetrated with positioning holes 20 for inserting two groups of limiting columns 23;
in this embodiment, by designing the U-shaped connecting rod 19 in a U-shape, the occurrence of the situation where the U-shaped connecting rod 19 completely slides off the support wall 5 during transportation, installation, etc. is reduced, by arranging the guide post 22 and the third spring 25, in the process that the wedge-shaped push plate 9 moves towards two sides along with the transmission plate 8, the push guide post 22 and the mounting plate 21 are integrally connected, overcome the elasticity of the third spring 25, move to both sides, so that the two sets of position-limiting posts 23 are respectively drawn out from the two sets of positioning holes 20, at the moment, the U-shaped connecting rod 19 can freely move up and down relative to the support wall 5, after the wedge-shaped push plate 9 is reset, the return beam 1 is reset, and the mounting plate 21 and the guide post 22 are connected and integrally reset under the action of the elastic force of the third spring 25, so that the two sets of limiting columns 23 are inserted into the positioning holes 20 again, and the U-shaped connecting rod 19 is fixedly connected with the support wall 5.
Preferably, as shown in fig. 7, a roller 26 is rotatably disposed on the end surface of the convex ring 24 contacting with the wedge-shaped push plate 9, and the roller 26 is in rolling contact with the wedge-shaped push plate 9;
in the embodiment, the sliding friction between the wedge-shaped push plate 9 and the guide column 22 is converted into rolling friction through the arrangement, so that the running stability of the equipment is improved.
Preferably, as shown in fig. 8, the ground grabbing device 7 includes a hydraulic cylinder 29 fixedly mounted on the outer wall of the support wall 5 and a first connecting rod 31 slidably mounted inside the support wall 5, a sliding groove 30 is penetratingly disposed on the outer wall of the wide side of the support wall 5, strip-shaped holes 28 are penetratingly disposed on the outer walls of the two groups of narrow sides of the support wall 5, and the strip-shaped holes 28 are parallel to the sliding groove 30;
the first connecting rods 31 are slidably mounted in the two groups of strip-shaped holes 28, connecting arms 32 are fixedly arranged in the middle of the first connecting rods 31, the connecting arms 32 are fixedly connected with the output end of the hydraulic cylinder 29, connecting shafts 33 are arranged at two ends, extending out of the outside, of the first connecting rods 31, inserting plates 34 are rotatably mounted on each group of connecting shafts 33, limiting plates 35 limiting the inserting plates 34 to move in the vertical direction are fixedly arranged on the outer walls of narrow sides of the supporting wall 5, top blocks 36 are slidably mounted at the bottoms of the strip-shaped holes 28, the top blocks 36 are used for extending out of two sides of the supporting wall 5 when the inserting plates 34 move below the limiting plates 35, and the two groups of inserting plates 34 are supported to be splayed;
the bottom of the supporting wall 5 is provided with a driving device for driving the two groups of top blocks 36 to synchronously extend outwards when the inserting plate 34 moves to the position below the limiting plate 35;
in this embodiment, by providing the limiting plate 35, the inserting plate 34 always keeps a vertical downward angle in the previous descending process, and after the inserting plate 34 descends to below the limiting plate 35, under the guiding action of the two sets of top blocks 36, the two sets of inserting plates 34 incline to two sides in a splayed shape, so that the connection strength between the two sets of inserting plates 34 and the ground is increased, and the installation stability of the two sets of supporting walls 5 is improved.
Preferably, as shown in fig. 8, the driving device includes a base 37 fixedly installed at the bottom of the support wall 5 and a pressing plate 39 slidably installed inside the support wall 5, two sides of the base 37 are rotatably installed with connecting rods 38, two sides of the pressing plate 39 are rotatably installed with two groups of connecting rods 38, the two groups of connecting rods 38 located on the same side of the base 37 and the pressing plate 39 are rotatably connected, a fourth spring 40 is fixedly installed between the base 37 and the pressing plate 39, and the joint of the two groups of connecting rods 38 on the same side is used for pushing the two groups of top blocks 36 to move outwards;
in this embodiment, through the above arrangement, it is convenient to control the two sets of top blocks 36 to rotate towards both sides synchronously, and when the two sets of inserting plates 34 are lifted along with the first connecting rod 31, the two sets of top blocks 36 are extruded to the original position under the guiding action of the two sets of limiting plates 35.
As a preferred option of the above technical solution, as shown in fig. 4, an expansion link 13 is inserted in each group of first springs 12, two ends of the expansion link 13 are respectively fixedly connected with the second fixing seat 11 and the first fixing seat 10, and an axis of the expansion link 13 is parallel to a moving path of the driving plate 8;
in this embodiment, by providing the telescopic rod 13, the moving linearity of the driving plate 8 is ensured, and the occurrence of the situation that the driving plate 8 is moved cheaply is reduced.
Preferably, the bottom of the jack 3 is provided with a centering chuck for fixing the jack 3 on the top end of the pile foundation 4 and enabling the axis of the output end of the jack 3 to be collinear with the axis of the pile foundation 4;
in this embodiment, through above-mentioned setting, be favorable to making the return force act on the axis direction of pile foundation 4 completely, reduce the circumstances of return force effect direction skew and take place, lifting means's experimental precision.
The static load test device for pile foundation detection provided by the invention has the advantages that the installation mode, the connection mode or the arrangement mode are common mechanical modes, and the static load test device can be implemented as long as the beneficial effects are achieved.
The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.
Claims (8)
1. A static test device for pile foundation detects, its characterized in that includes:
the anti-dropping device comprises a return beam (1) and two groups of supporting walls (5), wherein the return beam (1) is used for bearing a balance weight unit for a test, the two groups of supporting walls (5) are symmetrically arranged at the bottoms of two ends of the return beam (1) and are used for supporting the return beam (1), an anti-dropping device (6) is arranged between the return beam (1) and the two groups of supporting walls (5), and a top pile (2) is fixedly arranged at a position, opposite to a pile foundation (4), of the return beam (1);
the jack (3) is fixed at the top end of the pile foundation (4) and is matched with the jacking pile (2) to carry out a return static load experiment on the pile foundation (4);
the ground grabbing devices (7) are arranged at the bottom ends of the two groups of supporting walls (5) and used for fixing the supporting walls (5) on the ground, and the anti-falling devices (6) are used for relieving the action of the two groups of supporting walls (5) on the force returning beam (1) along the vertical direction during testing and enabling the two groups of supporting walls (5) to be fixedly connected with the force returning beam (1) after the testing is completed.
2. The static load test device for pile foundation detection according to claim 1, wherein the anti-dropping device (6) comprises a driving plate (8) slidably mounted at the lower end of the return beam (1) and a limiting device mounted inside the supporting wall (5), one end of the driving plate (8) close to the supporting wall (5) is fixedly provided with a wedge-shaped push plate (9), the wedge-shaped push plate (9) is used for triggering the limiting device, the bottom end of the return beam (1) is symmetrically provided with two groups of first fixing seats (10) relative to the driving plate (8), the wedge-shaped push plate (9) is provided with two groups of second fixing seats (11) corresponding to the two groups of first fixing seats (10), and a first spring (12) is connected and mounted between the first fixing seats (10) and the second fixing seats (11) on the same side;
the pile jacking device is characterized in that a stepped groove is formed in the top pile (2), the diameter of the bottom of the stepped groove is larger than the diameter of the top, notches for the transmission plate (8) to slide through are formed in the two sides of the top pile (2), a matching inclined plane is arranged at one end, extending into the top pile (2), of the transmission plate (8), a transmission rod (14) is movably mounted in the stepped groove, a limiting ring (15) is arranged on the outer wall of the transmission rod (14), a retainer ring (16) is sleeved on the outer wall of the transmission rod (14) and fixedly mounted at the stepped groove step, the transmission rod (14) is prevented from sliding down from the stepped groove, a second spring (17) is sleeved on the circumferential outer wall of the transmission rod (14), and the second spring (17) is located between the retainer ring (16) and the top end of the stepped groove;
the top end of the transmission rod (14) is provided with a conical surface corresponding to a matching inclined surface on the transmission plate (8), the limiting device is used for releasing the action of the two groups of support walls (5) on the force returning beam (1) along the vertical direction after being triggered by the wedge-shaped push plate (9), and the two groups of support walls (5) are fixedly connected with the force returning beam (1) after the wedge-shaped push plate (9) is far away from the limiting device.
3. The static load test device for pile foundation detection according to claim 2, wherein the limiting device comprises a U-shaped connecting rod (19) and a mounting plate (21) which are fixedly mounted at the bottom end of the return beam (1), the support wall (5) is hollow, the mounting plate (21) is provided with a guide post (22) and two sets of limiting posts (23), the side wall of the support wall (5) is provided with a through hole (27) for the guide post (22) and the two sets of limiting posts (23) to pass through, the guide post (22) is provided with a convex ring (24) on the circumferential outer wall inside the support wall (5), the guide post (22) is sleeved with a third spring (25), the third spring (25) is located between the convex ring (24) and the support wall (5), one end of the guide post (22) far away from the mounting plate (21) passes through the support wall (5) and extends to the inner side of the support wall (5), and is tightly pressed and contacted with the wedge-shaped push plate (9);
the top of the support wall (5) is provided with a guide hole (18) for movably penetrating a vertical section of a U-shaped connecting rod (19), and two groups of vertical sections on the U-shaped connecting rod (19) are provided with positioning holes (20) in a penetrating manner along the radial direction and used for inserting two groups of limiting columns (23).
4. A static load test device for pile foundation detection according to claim 3, wherein the end face of the convex ring (24) contacting with the wedge-shaped push plate (9) is rotatably provided with a roller (26), and the roller (26) is in rolling contact with the wedge-shaped push plate (9).
5. The static load test device for pile foundation detection according to the jack (3), wherein the ground grabbing device (7) comprises a hydraulic cylinder (29) fixedly mounted on the outer wall of the support wall (5) and a first connecting rod (31) slidably mounted inside the support wall (5), sliding grooves (30) are formed in the outer walls of the wide sides of the support wall (5) in a penetrating manner, strip-shaped holes (28) are formed in the outer walls of the two groups of narrow sides of the support wall (5) in a penetrating manner, and the strip-shaped holes (28) are parallel to the sliding grooves (30);
the supporting wall is characterized in that a first connecting rod (31) is slidably mounted in two groups of strip-shaped holes (28), connecting arms (32) are fixedly arranged in the middle of the first connecting rod (31), the connecting arms (32) are fixedly connected with the output end of a hydraulic cylinder (29), connecting shafts (33) are arranged at the two ends, extending out of the first connecting rod (31), of the outside, inserting plates (34) are rotatably mounted on the connecting shafts (33) of each group, limiting plates (35) for limiting the inserting plates (34) to move along the vertical direction are fixedly arranged on the outer wall of the narrow side of the supporting wall (5), jacking blocks (36) are slidably mounted at the bottoms of the strip-shaped holes (28) of each group, and the jacking blocks (36) are used for extending out of the two sides of the supporting wall (5) when the inserting plates (34) move below the limiting plates (35) and supporting the two groups of inserting plates (34) to the splayed shape;
and a driving device is arranged at the bottom of the support wall (5) and used for driving the two groups of ejector blocks (36) to synchronously extend outwards when the inserting plate (34) moves to the position below the limiting plate (35).
6. The static load test device for pile foundation detection according to claim 5, wherein the driving device comprises a base (37) fixedly installed at the bottom of the support wall (5) and a pressing plate (39) slidably installed inside the support wall (5), connecting rods (38) are rotatably installed on both sides of the base (37), two groups of connecting rods (38) are rotatably installed on both sides of the pressing plate (39), the two groups of connecting rods (38) located on the same side of the base (37) and the pressing plate (39) are rotatably connected, a fourth spring (40) is fixedly installed between the base (37) and the pressing plate (39), and the joint of the two groups of connecting rods (38) on the same side is used for pushing the two groups of top blocks (36) to move outwards.
7. The static load test device for pile foundation detection according to claim 2, wherein a telescopic rod (13) is inserted inside each group of the first springs (12), two ends of the telescopic rod (13) are fixedly connected with the second fixing seat (11) and the first fixing seat (10) respectively, and the axis of the telescopic rod (13) is parallel to the moving path of the driving plate (8).
8. The static load test device for pile foundation detection according to claim 1, wherein the bottom of the jack (3) is provided with a centering chuck for fixing the jack (3) on the top end of the pile foundation (4) and enabling the axis of the output end of the jack (3) to be collinear with the axis of the pile foundation (4).
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| CN202210013387.9A CN114215126B (en) | 2022-01-06 | 2022-01-06 | Static load test device for pile foundation detection |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN214219687U (en) * | 2020-10-29 | 2021-09-17 | 四川科鲁睿工程设计有限公司 | Prevent soil erosion and water loss's fixed protective structure |
| CN214472333U (en) * | 2021-01-29 | 2021-10-22 | 河南锐意工程检测有限公司 | Engineering pile detection static load test device |
| CN215330044U (en) * | 2021-07-09 | 2021-12-28 | 珠海思创物联科技有限公司 | Well lid unlocking means based on RFID and wireless power supply |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN214219687U (en) * | 2020-10-29 | 2021-09-17 | 四川科鲁睿工程设计有限公司 | Prevent soil erosion and water loss's fixed protective structure |
| CN214472333U (en) * | 2021-01-29 | 2021-10-22 | 河南锐意工程检测有限公司 | Engineering pile detection static load test device |
| CN215330044U (en) * | 2021-07-09 | 2021-12-28 | 珠海思创物联科技有限公司 | Well lid unlocking means based on RFID and wireless power supply |
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