Foundation pile pulling resistance static load tester

Abstract

The invention relates to the technical field of foundation pile anti-pulling tests, in particular to a foundation pile anti-pulling static load tester which comprises adjacent piles. And a movable test pile is arranged at the top of the adjacent pile and is fixed with the bottom of the jack. The anti-pulling foundation pile structure is arranged, a locking nut is rotated, the locking nut and a screw are in threaded transmission, a first back shore frame and a second back shore frame are folded towards the middle along with closing of a second height adjusting mechanism and a first height adjusting mechanism, and bolts of a first locking block and a second locking block are also slowly tightened to keep stable; the first back shore frame and the second back shore frame apply upward acting force to the reserved reinforcing steel bars, the reserved reinforcing steel bars are subjected to vertically upward force, the phenomenon that the reserved reinforcing steel bars are subjected to oblique pulling force and uneven stress is caused is prevented, finally, the first back shore frame and the second back shore frame are made to get close to the limiting rods, and the purposes of protecting the uplift foundation pile and smoothly completing the test detection task are achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pile uplift test, in particular to a pile uplift static load testing instrument. BACKGROUND

[0002] The pile bearing capacity detection of building engineering is a crucial link to ensure the construction quality of pile foundation engineering, and its accurate test is directly related to the safety, normal use and durability of the upper main structure, building decoration and other buildings of the building. The pile with vertical compression as the main force is usually detected by static load test to detect its ultimate bearing capacity.

[0003] The traditional pile uplift static load test adopts the stacking method or anchor pile method, which has obvious defects. The stacking method requires a large amount of counterweight material, which is time-consuming and labor-consuming to transport and unload, and is limited by the site; the anchor pile method requires pre-installed anchor piles, which increases the construction cost and period, and is easily affected by the bearing capacity of the anchor pile itself. The test results. And there are many ways to connect the single pile vertical uplift static load test device and the tested pile, generally a reliable connection is established with the test pile steel by welding. Due to the diversification of pile types, some problems will occur when the test device and the tested pile steel are connected.

[0004] For example, if the size of the pile type does not match the main beam type, it will cause part of the pile steel to be subjected to oblique tension, it is difficult to ensure the uniformity of the test stress, and it is easy to cause damage to the test pile, which cannot achieve the purpose of test detection. SUMMARY

[0005] (I) Technical problems solved In order to solve the above technical problems, the present application provides a pile uplift static load testing instrument.

[0006] (II) Technical scheme Based on this, the present application provides the following technical scheme: a pile uplift static load testing instrument, comprising adjacent piles; The top of the adjacent pile is provided with a movable test pile, the movable test pile is fixed with the bottom of the jack, the jack is fixedly connected with the bottom of the main beam, and the bottom of the main beam is provided with an uplift pile structure; The uplift pile structure comprises an uplift pile, a reserved steel bar, a fixed steel ring one, a fixed steel ring two, a locking ring, a top support frame one, a top support frame two, a locking top support mechanism and a limiting rod, the uplift pile is arranged in parallel with the adjacent pile, the top of the uplift pile is circumferentially distributed with the reserved steel bar, the bottom of the fixed steel ring one is fixed with the uplift pile, the top of the fixed steel ring two is fixed with the main beam, the top of the main beam is fixed with the locking ring, the locking top support mechanism is arranged in the middle of the fixed steel ring one and the fixed steel ring two, and the upper and lower sides of the locking top support mechanism are respectively clamped with the top support frame one and the top support frame two, and the top of the limiting rod is fixed with the fixed steel ring two.

[0007] Preferably, the fixed steel ring one and the fixed steel ring two are symmetrically arranged, and the middle part of the fixed steel ring one and the fixed steel ring two is provided with a reserved hole.

[0008] Preferably, the top support frame one is inclined, and two groups of top support frames one are arranged on the left and right sides of the fixed steel ring two, the outer side of the fixed steel ring two is provided with a locking block one, the upper end of the top support frame one is wrapped by the locking block one, and the inner side of the locking block one is bolted with the fixed steel ring two.

[0009] Preferably, the top support frame two is inclined, and two groups of top support frames two are arranged on the left and right sides of the fixed steel ring one, the outer side of the fixed steel ring one is provided with a locking block two, the upper end of the top support frame two is wrapped by the locking block two, and the inner side of the locking block two is bolted with the fixed steel ring one, and the top support frame one and the top support frame two are symmetrically arranged.

[0010] Preferably, the locking top support mechanism comprises a height adjusting mechanism one, a clamping structure, a locking structure, a screw rod, and a height adjusting mechanism two, the left end of the height adjusting mechanism one is provided with a clamping structure on the upper and lower sides, the clamping structure is engaged with the top support frame one, the middle part of the height adjusting mechanism one is provided with a locking structure, and the height adjusting mechanism one and the height adjusting mechanism two are symmetrically arranged.

[0011] Preferably, the screw rod is arranged on the front and rear sides of the height adjusting mechanism one and the height adjusting mechanism two, the screw rod penetrates the height adjusting mechanism one and the height adjusting mechanism two in sequence, the right end of the screw rod extends into the inner side of the locking structure, and the height adjusting mechanism one and the height adjusting mechanism two are moved to the middle part by the front and rear screw rods, so that the top support frame one and the top support frame two respectively apply upward and downward support force to the reserved steel bars, thereby ensuring that the reserved steel bars are vertically stressed upward, and achieving the purpose of protecting the uplift pile and smoothly completing the test and detection task.

[0012] Preferably, the height adjusting mechanism one comprises a vertical plate, a sliding block, a moving plate, and a locking bolt, the moving plate is fixed with the right end of the clamping structure, the vertical plate is fixed with the right end of the sliding block, the sliding block is slidingly matched with the right end of the moving plate, and the vertical plate is locked and fixed with the moving plate by the locking bolt, so as to adjust the relative position of the moving plate and the vertical plate.

[0013] Preferably, the moving plate is arranged on the left end of the vertical plate, and the left end of the moving plate is provided with a clamping structure on the upper and lower sides, and the left end of the moving plate is provided with a clamping structure on the front and rear sides, so as to adjust the clamping position of the clamping structure by adjusting the upper and lower positions of the two groups of moving plates, and facilitate the top support frame one and the top support frame two with different heights.

[0014] Preferably, the clamping structure includes connecting columns, positioning frames, sliding rods, clamping blocks, top wheels, extension springs, the right end of the connecting column is fixed with the height adjusting mechanism, the connecting column is fixed with the front end of the positioning frame, the sliding rods are in sliding fit with the middle part of the connecting column and the positioning frame, the sliding rods are fixed with the rear end of the clamping blocks, the front end of the positioning frame is provided with top wheels on the left and right sides, the top wheels are in contact with the side walls of the clamping blocks, the sliding rods are fixed with the left end of the extension springs, and the right end of the extension springs is fixedly connected with the connecting column.

[0015] Preferably, the locking structure includes movable seats, bearings, locking nuts, receiving frames and guide seats, the movable seat is fixed with the right end of the height adjusting mechanism one, the right end of the movable seat is fixed with a bearing, the bearing is movably connected with the left end of the locking nut, the left end of the movable seat is fixed with the receiving frame, and the middle part of the receiving frame is fixedly connected with the guide seat.

[0016] (Three) beneficial effects Compared with the prior art, the base pile static load test instrument has the following beneficial effects: The base pile static load test instrument is provided with the anti-pulling base pile structure, the locking nut is in threaded transmission with the screw rod, the height adjusting mechanism two and the height adjusting mechanism one are close to each other, the supporting frame one and the supporting frame two are folded to the middle, the bolts of the locking block one and the locking block two are slowly tightened to keep stable, the supporting frame one and the supporting frame two exert upward force on the reserved steel bars, the reserved steel bars are subjected to vertical force, the phenomenon of uneven stress caused by oblique tension is prevented, and finally the supporting frame one and the supporting frame two are folded to the limiting rod, the anti-pulling base pile is protected, and the test detection task is successfully completed. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present application; Figure 2 It is a schematic diagram of the anti-pulling base pile structure of the present application; Figure 3 It is a schematic diagram of the locking ring of the present application; Figure 4 It is a schematic diagram of the locking supporting mechanism of the present application; Figure 5 It is a schematic diagram of the height adjusting mechanism one of the present application; Figure 6 It is a schematic diagram of the clamping structure of the present application; Figure 7 It is a schematic diagram of the clamping structure of the present application; Figure 8It is the internal structure schematic view of the locking structure of the application.

[0018] In the figure: 1, adjacent pile, 2, movable test pile, 3, jack, 4, main beam, 5, anti-pulling pile structure; 51, anti-pulling pile, 52, reserved steel bar, 53, fixed steel ring one, 531, locking block two, 54, fixed steel ring two, 541, locking block one, 55, locking ring, 56, top support frame one, 57, top support frame two, 58, locking top support mechanism, 59, limiting rod; 581, height adjusting mechanism one, 582, clamping structure, 583, locking structure, 584, screw rod, 585, height adjusting mechanism two; 5811, vertical plate, 5812, sliding block, 5813, moving plate, 5814, locking bolt; 5821, connecting column, 5822, positioning frame, 5823, sliding rod, 5824, clamping block, 5825, top wheel, 5826, extension spring; 5831, movable seat, 5832, bearing, 5833, locking nut, 5834, receiving frame, 5835, guide seat. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the application.

[0020] Please refer to Figure 1 A pile anti-pulling static load tester, comprising an adjacent pile 1; the top of the adjacent pile 1 is provided with a movable test pile 2, the movable test pile 2 is fixed with the bottom of a jack 3, the jack 3 is fixedly connected with the bottom of a main beam 4, and the bottom of the main beam 4 is provided with an anti-pulling pile structure 5.

[0021] In the present application, the jack 3 is a multi-stage hydraulic cylinder, which is an execution element for long-stroke linear motion through a multi-stage sleeve-shaped piston rod. Its maximum feature is that the stroke can reach several times of a single-stage cylinder, while maintaining a compact retracted length. A displacement sensor (precision 0.01 mm) and a strain gauge are installed on the jack 3, which is connected to a full-automatic static load tester. The movable test pile 2 is designed in size according to the characteristics of the adjacent pile 1 and the arrangement of the test device. According to the actual conditions, it is processed by using reinforced concrete prefabrication or high-strength steel. When using reinforced concrete prefabrication, C50 concrete is used for one-time pouring and molding to ensure the flatness of the upper and lower surfaces. If necessary, a whole steel plate can be laid. When using high-strength steel processing, according to the specific size requirements or the stress condition of the test device, the type and quantity of I-beam are selected. The symmetry principle should be ensured during processing to control the uniform stress of the movable test pile 2.

[0022] Please refer to Figures 2-4 A foundation pile uplift static load tester, the uplift foundation pile structure 5 includes an uplift foundation pile 51, a reserved steel bar 52, a fixed steel ring one 53, a fixed steel ring two 54, a locking ring 55, a top support frame one 56, a top support frame two 57, a locking top support mechanism 58, and a limiting rod 59. The uplift foundation pile 51 is arranged in parallel with the adjacent pile 1. The top of the uplift foundation pile 51 is circumferentially distributed with the reserved steel bar 52. The bottom of the fixed steel ring one 53 is fixed with the uplift foundation pile 51. The top of the fixed steel ring two 54 is fixed with the main beam 4. The locking ring 55 is fixed with the top of the main beam 4. The locking top support mechanism 58 is arranged in the middle of the fixed steel ring one 53 and the fixed steel ring two 54, and the upper and lower sides of the locking top support mechanism 58 are clamped with the top support frame one 56 and the top support frame two 57, respectively. The top of the limiting rod 59 is fixed with the fixed steel ring two 54. The fixed steel ring one 53 and the fixed steel ring two 54 are arranged symmetrically up and down, and the middle of the fixed steel ring one 53 and the fixed steel ring two 54 is provided with a reserved hole. The reserved steel bar 52 penetrates the middle of the reserved hole of the fixed steel ring one 53 and the fixed steel ring two 54, respectively. The top support frame one 56 is arranged obliquely, and there are two groups of the top support frame one 56 arranged oppositely along the left and right sides of the fixed steel ring two 54. The outer side of the fixed steel ring two 54 is provided with a locking block one 541, which wraps the upper end of the top support frame one 56, and the inner side of the locking block one 541 is bolted with the fixed steel ring two 54. The top support frame two 57 is arranged obliquely, and there are two groups of the top support frame two 57 arranged oppositely along the left and right sides of the fixed steel ring one 53. The outer side of the fixed steel ring one 53 is provided with a locking block two 531, which wraps the upper end of the top support frame two 57, and the inner side of the locking block two 531 is bolted with the fixed steel ring one 53. The top support frame one 56 and the top support frame two 57 are arranged symmetrically up and down, and the side ends of the top support frame one 56 and the top support frame two 57 are provided with protrusions on the front and back sides, which are convenient for clamping and fixing the protrusions with the clamping structure 582.

[0023] In some embodiments, the locking support mechanism 58 comprises a height adjustment mechanism one 581, a clamping structure 582, a locking structure 583, a screw rod 584, a height adjustment mechanism two 585, the left end of the height adjustment mechanism one 581 is provided with the clamping structure 582 on the upper and lower sides in opposition, the clamping structure 582 is engaged with the support frame one 56, the middle part of the height adjustment mechanism one 581 is provided with the locking structure 583, the height adjustment mechanism one 581 and the height adjustment mechanism two 585 are provided in mutual symmetry, the screw rod 584 is provided with two groups in opposition along the front and back sides of the height adjustment mechanism one 581 and the height adjustment mechanism two 585, the screw rod 584 penetrates the height adjustment mechanism one 581 and the height adjustment mechanism two 585 in turn, and the right end of the screw rod 584 extends into the inside of the locking structure 583, the height adjustment mechanism one 581 and the height adjustment mechanism two 585 are brought together to the middle part through the front and back two groups of screw rods 584, so that the support frame one 56 and the support frame two 57 respectively exert the upward and downward support force on the reserved steel bar 52, which can ensure that the reserved steel bar 52 is stressed vertically upward, and achieve the purpose of protecting the uplift pile 51 and smoothly completing the test and detection task, the left end of the screw rod 584 is provided with a limiting seat, the limiting seat is embedded in the left end of the height adjustment mechanism two 585 and is in abutment with the left end of the height adjustment mechanism two 585, the support frame one 56 and the support frame two 57 are provided in eight-shaped symmetry, and the upper left and right sides of the fixed steel ring two 54 and the upper left and right sides of the fixed steel ring one 53 are respectively wrapped, the reserved steel bar 52 refers to the steel bar pre-buried in the building construction process for subsequent structure connection or functional expansion, mainly used for load transmission and structural integrity enhancement.

[0024] Please refer to Figures 5-7 The height adjustment mechanism one 581 of the pile uplift static load tester comprises a vertical plate 5811, a sliding block 5812, a moving plate 5813, and a locking bolt 5814, the moving plate 5813 is fixed with the right end of the clamping structure 582, the vertical plate 5811 is fixed with the right end of the sliding block 5812, the sliding block 5812 is in sliding fit with the right end inside of the moving plate 5813, the vertical plate 5811 is locked and fixed with the moving plate 5813 by the locking bolt 5814, the relative position of the moving plate 5813 and the vertical plate 5811 can be adjusted, the moving plate 5813 is provided with two groups in opposition along the left end of the vertical plate 5811, the left end of the two groups of moving plates 5813 is provided with the clamping structure 582 on the front and back sides, the clamping position of the clamping structure 582 can be changed by adjusting the up and down positions of the two groups of moving plates 5813, which is convenient for coping with the support frame one 56 and the support frame two 57 of different heights.

[0025] In some embodiments, the clamping structure 582 comprises a connecting column 5821, a positioning frame 5822, a sliding rod 5823, a clamping block 5824, a top wheel 5825, a telescopic spring 5826, the right end of the connecting column 5821 is fixed with the height adjusting mechanism 581, the connecting column 5821 is fixed with the front end of the positioning frame 5822, the sliding rod 5823 is in sliding fit with the middle part of the connecting column 5821 and the positioning frame 5822, the sliding rod 5823 is fixed with the rear end of the clamping block 5824, the front end of the positioning frame 5822 is oppositely provided with the top wheel 5825 on the left and right sides, the top wheel 5825 is in contact with the side wall of the clamping block 5824, the sliding rod 5823 is fixed with the left end of the telescopic spring 5826, the right end of the telescopic spring 5826 is fixedly connected with the connecting column 5821, the locking bolt 5814 is a high-strength bolt, the high-strength bolt is a key connecting element in the engineering field, and its core feature lies in that structural stability is realized through the synergistic effect of pre-tightening force and friction, and the telescopic spring 5826 is an energy storage element that realizes length change through elastic deformation.

[0026] Please refer to Figure 8 A foundation pile uplift static load tester, the locking structure 583 comprises a movable seat 5831, a bearing 5832, a locking nut 5833, a receiving frame 5834 and a guide seat 5835, the movable seat 5831 is fixed with the right end of the height adjusting mechanism 581, the right end of the movable seat 5831 is fixedly provided with the bearing 5832 on the inner side, the bearing 5832 is movably connected with the left end of the locking nut 5833, the left end of the movable seat 5831 is fixed with the receiving frame 5834, the middle part of the receiving frame 5834 is fixedly connected with the guide seat 5835, the bearing 5832 is a core component for supporting a rotating body, reducing a friction coefficient and ensuring the accuracy of rotation in mechanical equipment, so that the locking nut 5833 can stably rotate, the locking nut 5833 is a special fastener for preventing the loosening of a threaded connection, and is in threaded fit with the screw rod 584, and the guide seat 5835 is used for guiding the screw rod 584.

[0027] As described above, in use, first, a suitable adjacent pile 1 is found, then the movable test pile 2 is placed on the top of the adjacent pile 1, if necessary, a whole steel plate can be laid on the top of the movable test pile 2 and the adjacent pile 1, and then the jack 3 is installed on the top of the movable test pile 2; Next, the fixed steel ring one 53 is fixed on the top of the uplift foundation pile 51, the reserved steel bar 52 penetrates through the middle part of the fixed steel ring one 53, and the reserved steel bar 52 is fixed on the fixed steel ring one 53 through an anchor device, and the fixed steel ring two 54 is installed in the same way; Then the top support frame one 56 and the top support frame two 57 are buckled on the left and right sides of the fixed steel ring two 54 and the fixed steel ring one 53 respectively, and the top support frame one 56 and the top support frame two 57 are arranged in a figure-eight shape, and the locking block one 541 and the locking block two 531 are used to lock and position the top support frame one 56 and the top support frame two 57 respectively; After locking, the height adjusting mechanism two 585 and the height adjusting mechanism one 581 embrace the middle part of the top support frame one 56 and the top support frame two 57, the clamping structure 582 clamps the top support frame one 56 and the top support frame two 57 respectively, and the screw rod 584 penetrates the middle part of the height adjusting mechanism two 585 and the height adjusting mechanism one 581, so that the right end of the screw rod 584 passes through the guide seat 5835 and extends into the locking nut 5833, then the locking nut 5833 is rotated clockwise to drive the screw rod 584 in a threaded manner, so that the height adjusting mechanism two 585 and the height adjusting mechanism one 581 are tightened, and during the tightening process of the height adjusting mechanism two 585 and the height adjusting mechanism one 581, Because the clamping structure 582 arranged on the upper end of the top support frame one 56 and the top support frame two 57 clamps the top support, as the protrusion on the upper end of the top support frame one 56 and the top support frame two 57 is embedded in the inner side of the clamping block 5824, the clamping block 5824 is driven to move to the right end, so that the clamping block 5824 is tightened to the middle by the top support of the top wheel 5825, the protrusion is stably clamped, and when the clamping block 5824 moves, the sliding rod 5823 moves to the right end and drives the extension spring 5826 to contract; As the height adjusting mechanism two 585 and the height adjusting mechanism one 581 approach each other, the top support frame one 56 and the top support frame two 57 are folded to the middle, in order to maintain stability, the bolts of the locking block one 541 and the locking block two 531 on the other side of the top support frame one 56 and the top support frame two 57 are also slowly tightened, so that the top support frame one 56 and the top support frame two 57 exert an upward force on the reserved steel bar 52, so that the reserved steel bar 52 is subjected to a vertical upward force, preventing the reserved steel bar 52 from being subjected to an oblique tensile force, causing uneven stress, and finally the top support frame one 56 and the top support frame two 57 are folded to the limiting rod 59; After the operation is completed, the main beam 4 is fixed on the top of the fixed steel ring two 54, the locking ring 55 is arranged on the main beam 4, and the reserved steel bar 52 is fixed again to prevent the reserved steel bar 52 from loosening; Then the top of the jack 3 can be fixed with the bottom of the main beam 4, a constant or slowly increasing static load is applied through the jack 3 to determine the bearing capacity, deformation characteristics and failure mode of the uplift pile 51, complete the standardized test, and record and display the data through the full-automatic static load tester, automatically collect displacement, load and other data.

[0028] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely exemplary of the principles and application of the present application. Numerous modifications and adaptions can be effected without departing from the spirit and scope of the present application, which is not limited to the exact construction and arrangement described. It is intended, therefore, to cover all modifications and adaptions that fall within the scope of the claims and their equivalents.

Claims

1. A static load tester for pile pull-out resistance, characterized in that: Including adjacent piles (1); The top of the adjacent pile (1) is provided with a movable test pile (2), the movable test pile (2) is fixed to the bottom of the jack (3), the jack (3) is fixedly connected to the bottom of the main beam (4), and the bottom of the main beam (4) is provided with an anti-pull-out foundation pile structure (5). The anti-uplift pile structure (5) includes an anti-uplift pile (51), reserved reinforcing bars (52), a first fixed steel ring (53), a second fixed steel ring (54), a locking ring (55), a first top support frame (56), a second top support frame (57), a locking top support mechanism (58), and a limiting rod (59). The anti-uplift pile (51) is arranged parallel to the adjacent pile (1). Reserved reinforcing bars (52) are distributed circumferentially on the top of the anti-uplift pile (51). The bottom of the first fixed steel ring (53) is connected to the... The anti-uplift pile (51) is fixed, the top of the second fixed steel ring (54) is fixed to the main beam (4), the locking ring (55) is fixed to the top of the main beam (4), the locking top support mechanism (58) is set in the middle of the first fixed steel ring (53) and the second fixed steel ring (54), and the upper and lower sides of the locking top support mechanism (58) are respectively clamped to the first top support frame (56) and the second top support frame (57), and the top of the limiting rod (59) is fixed to the second fixed steel ring (54).

2. The pile pull-out static load tester according to claim 1, characterized in that: The first fixed steel ring (53) and the second fixed steel ring (54) are arranged symmetrically in the upper and lower parts, and the middle of the first fixed steel ring (53) and the second fixed steel ring (54) are provided with reserved holes. The reserved steel bars (52) pass through the middle of the reserved holes of the first fixed steel ring (53) and the second fixed steel ring (54).

3. The pile pull-out static load tester according to claim 1, characterized in that: The top support frame (56) is inclined and there are two sets of top support frames (56), which are arranged opposite to each other on the left and right sides of the fixing steel ring (54). The outer side of the fixing steel ring (54) is provided with a locking block (541), which wraps the upper end of the top support frame (56) and the inner side of the locking block (541) is bolted to the fixing steel ring (54).

4. The pile pull-out static load tester according to claim 1, characterized in that: The second top support frame (57) is inclined and there are two sets of the second top support frame (57), which are arranged opposite to each other on the left and right sides of the first fixed steel ring (53). The second locking block (531) is provided on the outer side of the first fixed steel ring (53). The second locking block (531) wraps around the upper end of the second top support frame (57), and the inner side of the second locking block (531) is bolted to the first fixed steel ring (53). The first top support frame (56) and the second top support frame (57) are arranged symmetrically from top to bottom.

5. The pile pull-out static load tester according to claim 1, characterized in that: The locking top support mechanism (58) includes a height adjustment mechanism one (581), a clamping structure (582), a locking structure (583), a screw (584), and a height adjustment mechanism two (585). The left end of the height adjustment mechanism one (581) is provided with clamping structures (582) on both the upper and lower sides. The clamping structures (582) are engaged with the top support frame one (56). The middle part of the height adjustment mechanism one (581) is provided with a locking structure (583). The height adjustment mechanism one (581) and the height adjustment mechanism two (585) are symmetrically arranged.

6. The pile pull-out static load tester according to claim 5, characterized in that: There are two sets of screws (584), and the screws (584) are arranged opposite to each other on the front and rear sides of the height adjustment mechanism one (581) and the height adjustment mechanism two (585). The screws (584) pass through the height adjustment mechanism one (581) and the height adjustment mechanism two (585) in sequence, and the right end of the screws (584) extends into the inside of the locking structure (583).

7. The static load tester for pile pull-out as described in claim 5, characterized in that: The height adjustment mechanism (581) includes a vertical plate (5811), a slider (5812), a movable plate (5813), and a locking bolt (5814). The movable plate (5813) is fixed to the right end of the clamping structure (582). The vertical plate (5811) is fixed to the right end of the slider (5812). The slider (5812) slides inside the right end of the movable plate (5813). The vertical plate (5811) is locked and fixed to the movable plate (5813) by the locking bolt (5814).

8. The static load tester for pile pull-out as described in claim 7, characterized in that: Two sets of movable plates (5813) are provided, and the movable plates (5813) are arranged opposite each other on the upper and lower sides of the left end of the vertical plate (5811). Clamping structures (582) are provided on the front and rear sides of the left end of the two sets of movable plates (5813).

9. A static load tester for pile pull-out resistance according to claim 5, characterized in that: The clamping structure (582) includes a connecting column (5821), a positioning frame (5822), a slide rod (5823), a clamping block (5824), a top wheel (5825), and a telescopic spring (5826). The right end of the connecting column (5821) is fixed to the height adjustment mechanism (581), and the connecting column (5821) is fixed to the front end of the positioning frame (5822). The slide rod (5823) is connected to both the connecting column (5821) and the positioning frame. The middle part of (5822) is slidably fitted, the slide rod (5823) is fixed to the rear end of the clamping block (5824), the front left and right sides of the positioning frame (5822) are provided with top wheels (5825), the top wheels (5825) are in contact with the side wall of the clamping block (5824), the slide rod (5823) is fixed to the left end of the telescopic spring (5826), and the right end of the telescopic spring (5826) is fixedly connected to the connecting column (5821).

10. A static load tester for pile pull-out resistance according to claim 5, characterized in that: The locking structure (583) includes a movable seat (5831), a bearing (5832), a locking nut (5833), a support frame (5834), and a guide seat (5835). The movable seat (5831) is fixed to the right end of the height adjustment mechanism (581). The bearing (5832) is fixed to the inner side of the right end of the movable seat (5831). The bearing (5832) is movably connected to the left end of the locking nut (5833). The left end of the movable seat (5831) is fixed to the support frame (5834). The middle part of the support frame (5834) is fixedly connected to the guide seat (5835).

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