Novel uplift static load test device for prefabricated square pile

Abstract

The utility model discloses a novel prefabricated square pile uplift static load test device which comprises buttresses and a prefabricated square pile body, the buttresses are arranged on the two sides of the prefabricated square pile body, and the top ends of the buttresses are connected with a main beam. In the using process, the two sets of first locking blocks are welded to the reinforcing steel bar, the second locking blocks and the first locking blocks are rapidly connected and welded through the positioning blocks and the positioning grooves, overall installation of the locking blocks is completed, and a ladder-shaped structure with the small lower portion and the large upper portion is formed between the bottom and the top of each locking block; the two groups of tension locking frames are mutually matched with the inner contours of the connecting grooves formed in the tension locking frames, and the two groups of tension locking frames are connected and locked on the outer side of the locking block assembly through the first bolts, that is, in the anti-pulling static load test process, not only can the steel bar clamping firmness be improved, but also the tension locking frames and the locking blocks are connected in a split manner, so that the clamping firmness is improved. And the pulling force locking frame can be conveniently recycled.

Description

Technical Field

[0001] The utility model relates to the technical field of pile foundation detection, in particular to a novel prefabricated square pile anti-pulling static load test device. Background Art

[0002] With the rapid development of science and technology, people have more and more requirements for environmental protection. Prefabricated square piles, as a prefabricated component, are easy to construct, environmentally friendly, and have high strength. Because they are solid piles, they can achieve higher shear resistance than prefabricated pipe piles. Therefore, square piles are generally used in construction projects. Whether it is to provide scientific and reliable design basis for design units or for project quality acceptance, the single pile vertical pullout static load test is the most effective means to test the vertical pullout bearing capacity. Its characteristics are that it can scientifically, intuitively and accurately reflect the vertical pullout bearing capacity of prestressed pipe piles.

[0003] When conducting a static pullout test on a square pile, a jack is generally used to drive the tension rod and the connecting plate connected to the extended steel bars at the upper end of the engineering pile for testing. However, the current connecting plate is usually fixedly connected to the extended main reinforcement of the engineering pile by welding. After the test, the entire connecting plate needs to be cut, which causes a lot of material waste and increases the testing cost. There is a certain room for optimization. Therefore, it is necessary to design a new type of prefabricated square pile static pullout test device to solve the above-mentioned problems. Utility Model Content

[0004] The utility model aims to provide a novel prefabricated square pile anti-pulling static load test device to solve the problems of high test cost and inconvenience in recycling the device proposed in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a novel prefabricated square pile anti-pulling static load test device, comprising a buttress and a prefabricated square pile body, wherein the buttress is arranged on both sides of the prefabricated square pile body;

[0006] The top of the pier is connected to the main beam, and a hydraulic cylinder is provided at the top of the main beam, the top of the hydraulic cylinder is connected to the top plate, the top of the prefabricated square pile body is evenly fixed with steel bars, and the outside of the steel bars is welded with a first locking block and a second locking block, the outsides of the first locking block and the second locking block are connected to the first tension locking frame and the second tension locking frame, the first tension locking frame and the second tension locking frame are each provided with a connecting groove inside, and the connecting groove is connected to the first locking block and the second locking block, the first tension locking frame and the second tension locking frame are each connected to a pull rod inside, and the top of the pull rod vertically penetrates the inside of the main beam and is connected to the top plate, and both ends of the pull rod are connected to a locking nut.

[0007] Preferably, a clamping plate is evenly fixed to the top of the pier, screw holes are opened at both ends of the main beam, and the inside of the screw holes are connected with second bolts through the clamping plate.

[0008] Preferably, two groups of the clamping plates are provided, and the clamping plates are symmetrically arranged about the central axis of the pier.

[0009] Preferably, positioning grooves are formed on the inner sides of the first locking blocks, positioning blocks are evenly fixed on both ends of the second locking blocks, and the positioning blocks are connected to the positioning grooves.

[0010] Preferably, the width of the positioning groove matches the width of the positioning block, and the cross-sections of the positioning groove and the positioning block are both convex.

[0011] Preferably, the diameter of the first locking block is equal to the diameter of the second locking block, and the cross-sections of the first locking block and the second locking block are both arranged to be inverted convex shapes.

[0012] Preferably, through holes are formed on both sides of the first tension locking frame and the second tension locking frame, and first bolts are connected inside the through holes.

[0013] Compared with the prior art, the utility model has the following beneficial effects: the novel prefabricated square pile anti-pulling static load test device realizes the function of being easy to recycle and use;

[0014] By welding the two groups of first locking blocks to the steel bars during use, and quickly connecting and welding the second locking block to the first locking block via the positioning block and the positioning groove, the overall installation of the locking block is completed, and a stepped structure with a smaller bottom and a larger top is formed between the bottom and the top of the locking block, which cooperates with the inner contour of the connecting groove opened by the tension locking frame, and the two groups of tension locking frames are connected and locked on the outside of the locking block assembly by the first bolt, that is, during the pull-out static load test, it can not only ensure the firmness of the steel bar clamping, but also the tension locking frame and the locking block are connected in a split manner, which can facilitate the recycling of the tension locking frame, reduce the detection cost, and improve the practicability and flexibility of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a front view cross-sectional structural schematic diagram of the utility model;

[0017] Figure 2It is a schematic diagram of the cross-sectional structure of the tension locking frame of the utility model from top view;

[0018] Figure 3 This is a schematic diagram of the three-dimensional structure of the first locking block of the utility model;

[0019] Figure 4 This is a schematic diagram of the three-dimensional structure of the second locking block of the utility model;

[0020] Figure 5 It is a schematic diagram of the three-dimensional structure of the splint of the utility model.

[0021] Explanation of the reference numerals in the figure: 1. top plate; 2. main beam; 3. pier; 4. prefabricated square pile body; 5. steel bar; 6. first tension locking frame; 7. connecting groove; 8. first locking block; 9. screw hole; 10. clamping plate; 11. pull rod; 12. hydraulic cylinder; 13. second locking block; 14. positioning groove; 15. positioning block; 16. second tension locking frame; 17. through hole; 18. first bolt; 19. second bolt; 20. locking nut. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-Figure 5 , the utility model provides an embodiment: a novel prefabricated square pile anti-pulling static load test device, comprising a buttress 3 and a prefabricated square pile body 4;

[0024] The top of the pier 3 is evenly fixed with a clamping plate 10, both ends of the main beam 2 are provided with screw holes 9, and the inside of the screw holes 9 are connected with second bolts 19 through the clamping plates 10. Two groups of clamping plates 10 are provided, and the clamping plates 10 are symmetrically arranged about the central axis of the pier 3;

[0025] Specifically, Figure 1 and Figure 5 As shown, when in use, a clamping plate 10 is provided, which is fixedly connected to the main beam 2 by a second bolt 19, so as to improve the anti-detachment property of the connection between the device structures when in use, and enhance the use effect of the device;

[0026] The buttress 3 is arranged on both sides of the prefabricated square pile body 4, the top of the buttress 3 is connected to the main beam 2, and the top of the main beam 2 is provided with a hydraulic cylinder 12, the top of the hydraulic cylinder 12 is connected to the top plate 1, the top of the prefabricated square pile body 4 is evenly fixed with steel bars 5, and the outer side of the steel bars 5 is welded with a first locking block 8 and a second locking block 13;

[0027] The inner side of the first locking block 8 is provided with a positioning groove 14, and the two ends of the second locking block 13 are evenly fixed with positioning blocks 15, and the positioning blocks 15 are connected to the positioning groove 14;

[0028] Specifically, Figure 2 , Figure 3 and Figure 4 As shown, when in use, the positioning block 15 and the positioning groove 14 can play the role of guiding and limiting the first locking block 8 and the second locking block 13 when connected, thereby improving the convenience of connection;

[0029] The diameter of the first locking block 8 is equal to the diameter of the second locking block 13, and the cross-sections of the first locking block 8 and the second locking block 13 are both set to be inverted convex;

[0030] Specifically, Figure 1 As shown, when in use, by setting the cross-sections of the first locking block 8 and the second locking block 13 to be inverted convex shapes, it is possible to facilitate the subsequent pull-out test;

[0031] The first locking block 8 and the second locking block 13 are connected to the outer sides thereof with a first tension locking frame 6 and a second tension locking frame 16;

[0032] Through holes 17 are provided on both sides of the first tension locking frame 6 and the second tension locking frame 16, and first bolts 18 are connected inside the through holes 17;

[0033] Specifically, Figure 2 As shown, when in use, the first tension locking frame 6 and the second tension locking frame 16 can be connected or disassembled by providing a first bolt 18;

[0034] The first tension locking frame 6 and the second tension locking frame 16 are both provided with connecting grooves 7, and the connecting grooves 7 are connected to the first locking block 8 and the second locking block 13. The first tension locking frame 6 and the second tension locking frame 16 are both connected with pull rods 11, and the top ends of the pull rods 11 vertically penetrate the interior of the main beam 2 and are connected to the top plate 1, and both ends of the pull rods 11 are connected with locking nuts 20.

[0035] Working principle: When the utility model is in use, the two groups of first locking blocks 8 are welded to the steel bars 5, and the second locking block 13 is quickly connected and welded to the first locking block 8 via the positioning block 15 and the positioning groove 14, so that the overall installation of the locking block is completed, and a stepped structure with a smaller bottom and a larger top is formed between the bottom and the top of the locking block, which cooperates with the inner contour of the connecting groove 7 opened by the tension locking frame, and the two groups of tension locking frames are connected and locked on the outside of the locking block assembly by the first bolt 18. At the same time, the top plate 1 and the tension locking frame are connected by a pull rod 11, and the hydraulic cylinder 12 is started to drive the top plate 1 to lift for a pull-out test. At the same time, the tension locking frame and the locking block are connected in a split type, which can facilitate the recycling of the tension locking frame after the test, reduce the detection cost, and improve the practicality and flexibility of the device.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A novel prefabricated square pile anti-pulling static load test device, comprising a buttress (3) and a prefabricated square pile body (4), wherein the buttress (3) is arranged on both sides of the prefabricated square pile body (4); Features: The top of the pier (3) is connected to the main beam (2), and the top of the main beam (2) is provided with a hydraulic cylinder (12), the top of the hydraulic cylinder (12) is connected to the top plate (1), the top of the prefabricated square pile body (4) is evenly fixed with steel bars (5), and the outer side of the steel bars (5) is welded with a first locking block (8) and a second locking block (13), and the outer sides of the first locking block (8) and the second locking block (13) are connected with a first tension locking frame (6) and a second tension locking frame (16). The first tension locking frame (6) and the second tension locking frame (16) are each provided with a connecting groove (7) inside, and the connecting groove (7) is connected to the first locking block (8) and the second locking block (13); the first tension locking frame (6) and the second tension locking frame (16) are each connected to a pull rod (11) inside, and the top end of the pull rod (11) vertically penetrates the inside of the main beam (2) and is connected to the top plate (1); both ends of the pull rod (11) are connected to locking nuts (20).

2. A novel prefabricated square pile anti-pulling static load test device according to claim 1, characterized in that: A clamping plate (10) is evenly fixed on the top of the pier (3), screw holes (9) are opened at both ends of the main beam (2), and the inside of the screw holes (9) are connected with second bolts (19) through the clamping plate (10).

3. A novel prefabricated square pile anti-pulling static load test device according to claim 2, characterized in that: Two groups of the clamping plates (10) are provided, and the clamping plates (10) are symmetrically arranged with respect to the central axis of the buttress (3).

4. The novel prefabricated square pile anti-pulling static load test device according to claim 1 is characterized by: The first locking block (8) is provided with a positioning groove (14) on its inner side, and positioning blocks (15) are evenly fixed at both ends of the second locking block (13), and the positioning blocks (15) are connected to the positioning groove (14).

5. The novel prefabricated square pile anti-pulling static load test device according to claim 4 is characterized in that: The width of the positioning groove (14) matches the width of the positioning block (15), and the cross-sections of the positioning groove (14) and the positioning block (15) are both convex.

6. The novel prefabricated square pile anti-pulling static load test device according to claim 1 is characterized by: The diameter of the first locking block (8) is equal to the diameter of the second locking block (13), and the cross-sections of the first locking block (8) and the second locking block (13) are both arranged to be in an inverted convex shape.

7. The novel prefabricated square pile anti-pulling static load test device according to claim 1 is characterized by: Through holes (17) are provided on both sides of the first tension locking frame (6) and the second tension locking frame (16), and first bolts (18) are connected inside the through holes (17).

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