A static load test device for detecting a traffic engineering pile foundation

Abstract

The utility model discloses a traffic engineering pile foundation detection static load test device relates to pile foundation detection technical field, aims at solving the technical problem that the counterforce balance of test device will be broken when one of the anchor points appears loose currently, including counterforce plate and the support pole of counterforce plate lower end array setting and the positioning mechanism of support pole upper setting, the end of support pole is installed with anchor point fixed plate, the lower end of counterforce plate is installed with hydraulic jack through bolt, the hydraulic rod end of hydraulic jack is provided with pressure plate, the positioning mechanism includes the counterforce connecting rod of array setting, the lower end of counterforce connecting rod is installed with fixed rod, is provided with buffer bar on fixed rod, is provided with buffer positioning plate on buffer bar. The utility model has the advantages of over V-shaped counterforce connecting rod connection support pole constructs stable frame, can transmit force to other anchor points and maintain balance when single anchor point loosens, guarantees the advantage that data is accurate.

Description

Technical Field

[0001] This utility model relates to the field of pile foundation testing technology, and more specifically, to a static load testing device for pile foundation testing in traffic engineering. Background Technology

[0002] Piling foundations are a common form of deep foundation in transportation infrastructure construction, widely used in bridges, tunnels, road slope retaining structures, and other projects. Their main function is to transfer the load of the superstructure to deep, stable strata through the piles, meeting requirements for bearing capacity, stability, and deformation control. In transportation engineering, pile foundations offer advantages such as high bearing capacity, adaptability to complex geological conditions, high degree of mechanization in construction, and minimal impact on the surrounding environment.

[0003] Static load testing of pile foundations is a crucial step in ensuring the stability of building structures. Currently, static load tests on traffic engineering pile foundations use hydraulic jacks to apply downward forces to the piles to simulate actual load conditions. During the test, multiple anchor points counteract the opposing forces to maintain the stability of the testing device. If any anchor point loosens, the reaction force balance of the testing device will be disrupted. This imbalance not only interferes with the accuracy of the test data but may also lead to misjudgments of the pile foundation's bearing capacity, thus creating safety hazards for traffic engineering projects and seriously threatening the safety of subsequent construction and use. Therefore, we propose a static load testing device for traffic engineering pile foundations. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology, adapt to the needs of reality, and provide a static load test device for pile foundation testing in traffic engineering, so as to solve the technical problem that the reaction force balance of the test device will be broken when one of the anchor points becomes loose.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a static load test device for pile foundation testing in traffic engineering, comprising a reaction plate, support rods arranged in an array at the lower end of the reaction plate, and a positioning mechanism arranged on the support rods. An anchor fixing plate is installed at the end of the support rods. A hydraulic jack is bolted to the lower end of the reaction plate. A pressure plate is provided at the end of the hydraulic rod of the hydraulic jack. The positioning mechanism includes an array of reaction connecting rods. A fixing rod is installed at the lower end of the reaction connecting rods. A buffer rod is provided on the fixing rod. A buffer positioning plate is provided on the buffer rod.

[0006] Preferably, the reaction link includes two link sections, which are bent and connected together, forming a V-shape, and a positioning part is formed at the connection between the link sections.

[0007] Preferably, the front end of the positioning part is arc-shaped, and each of the positioning parts is provided with a ball bearing. A hydraulic positioning hole is formed between the plurality of positioning parts, and the hydraulic rod of the hydraulic jack is located between the plurality of positioning parts, with the ball bearing in contact with the hydraulic rod of the hydraulic jack.

[0008] Preferably, the end of the connecting rod is bent at 90 degrees to form a bend, and the end of the bend is provided with a connecting plate. Adjacent connecting plates are connected to the support rod by bolts.

[0009] Preferably, the fixing rod is L-shaped along its long axis, the buffer rod is located at the upper end of the L-shaped bend of the fixing rod, the buffer rod is arc-shaped along its long axis, the buffer rod is arch-shaped as a whole, and the material of the buffer rod is spring steel.

[0010] Preferably, the lower end of the buffer positioning plate is provided with a positioning groove, the upper end of the buffer rod is located in the positioning groove, the buffer positioning plate is fan-shaped, the buffer positioning plate is located below the pressure plate, the front end of the buffer positioning plate is arc-shaped, and pile foundation positioning holes are formed between several buffer positioning plates.

[0011] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model designs a reaction link structure, using V-shaped reaction links to connect multiple support rods, forming a stable overall frame structure. When an anchor point becomes loose, the force on that loose anchor point can be transferred to other non-loose anchor points through the reaction link. The other anchor points and the connected reaction links work together to share the force originally borne by the loose anchor point, effectively maintaining the stability of the test device and preventing the reaction balance of the test device from being broken due to the loosening of a single anchor point. This ensures the accuracy of the test data, prevents misjudgment of the pile foundation bearing capacity, and eliminates safety hazards in the subsequent construction and use of traffic engineering. Secondly, the positioning part between the connecting parts of the reaction link can accurately position the hydraulic rod of the hydraulic jack, ensuring that the hydraulic rod moves stably along the predetermined direction during the application of force, avoiding deviation or tilting, further ensuring the accuracy and reliability of the test force application, so that the test data can more accurately reflect the bearing performance of the pile foundation, and solving the problem that the reaction balance of the test device will be broken when one of the anchor points becomes loose.

[0012] 2. This utility model also incorporates a buffer rod and positioning plate structure. When the hydraulic rod of the hydraulic jack extends to near its maximum stroke, the pressure plate presses against the buffer positioning plate. The buffer rod deforms to buffer the pressure on the pressure plate, while the L-shaped fixing rod restricts the pressure plate from continuing to descend. This effectively prevents the load from exceeding the design value due to uncontrolled stroke during manual operation, thus avoiding damage to the pile. Furthermore, the pile positioning hole formed by multiple fan-shaped buffer positioning plates has an arc-shaped front end that matches the shape of the pile. It can be precisely fitted onto the outside of the pile to center the load applied by the pressure plate, ensuring that the load is evenly transmitted to the top of the pile. This prevents the pile from tilting under stress and avoids detection errors caused by eccentric stress, further improving the accuracy and reliability of the static load test results of the pile. Attached Figure Description

[0013] Figure 1 This is a front view structural diagram of the present utility model; Figure 2 This is a bottom view of the test mechanism of this utility model; Figure 3 This is a schematic diagram of the positioning mechanism structure of this utility model; Figure 4 This is a partial front view schematic diagram of the positioning mechanism of this utility model; Figure 5 This is a partial bottom view of the positioning mechanism of this utility model.

[0014] The following are the labels in the diagram: 101, reaction plate; 102, support rod; 103, anchor fixing plate; 104, hydraulic jack; 105, pressure plate; 200, positioning mechanism; 201, reaction rod; 2011, connecting rod part; 2012, positioning part; 2013, bending part; 2014, connecting plate; 2015, ball bearing; 202, hydraulic positioning hole; 203, fixing rod; 204, buffer rod; 205, buffer positioning plate; 206, pile foundation positioning hole. Detailed Implementation

[0015] like Figures 1 to 5As shown, this utility model relates to a static load testing device for pile foundation testing in traffic engineering, including a reaction plate 101, support rods 102 arranged in an array at the lower end of the reaction plate 101, and a positioning mechanism 200 arranged on the support rods 102. An anchor fixing plate 103 is installed at the end of the support rods 102. A hydraulic jack 104 is bolted to the lower end of the reaction plate 101. A pressure plate 105 is provided at the end of the hydraulic rod of the hydraulic jack 104. The positioning mechanism 200 includes an array of reaction connecting rods 201. A fixing rod 203 is installed at the lower end of the reaction connecting rods 201. A buffer rod 204 is provided on the fixing rod 203. A buffer positioning plate 205 is provided on the buffer rod 204. This utility model constructs a stable frame by connecting the support rod 102 with the V-shaped reaction rod 201. When a single anchor point becomes loose, the force can be transferred to other anchor points to maintain balance and ensure data accuracy. Secondly, the positioning part 2012 works with the ball bearing 2015 to ensure that the hydraulic rod applies force stably. The buffer rod 204 combined with the positioning plate can buffer overload and accurately position the load, avoiding damage to the pile and eccentricity error.

[0016] Specifically, the reaction link 201 includes two link sections 2011, which are bent and connected to form a V-shape. A positioning section 2012 is formed at the connection between the link sections 2011. The V-shape of the reaction link 201 not only connects multiple support rods 102 to form a stable overall frame, but also allows other anchor points and connected reaction links 201 to work together to share the force originally borne by the loose anchor point when one anchor point becomes loose, maintaining the stability of the test device, ensuring the accuracy of the test data, and avoiding misjudgment of the pile foundation's bearing capacity. Furthermore, it forms the positioning section 2012, which positions the hydraulic rod of the hydraulic jack 104, ensuring that the hydraulic rod moves along a predetermined direction during force application, avoiding deviation or tilting, thereby ensuring the accuracy and reliability of the applied test force.

[0017] Furthermore, the front end of the positioning part 2012 is arc-shaped, and each positioning part 2012 has a ball bearing 2015 at its front end. Hydraulic positioning holes 202 are formed between several positioning parts 2012. The hydraulic rod of the hydraulic jack 104 is located between the positioning parts 2012, and the ball bearing 2015 contacts the hydraulic rod of the hydraulic jack 104. The positioning part 2012 can position the hydraulic rod of the hydraulic jack 104, ensuring that the hydraulic rod moves along a predetermined direction during the application of force, avoiding deviation or tilting. The ball bearing 2015 converts the sliding friction between the hydraulic rod and the positioning part 2012 into rolling friction, which significantly reduces the coefficient of friction while positioning the hydraulic rod during extension and retraction.

[0018] It is worth noting that the end of the connecting rod 2011 is bent at a 90-degree angle to form a bending part 2013, and the end of the bending part 2013 is provided with a connecting plate 2014. Adjacent connecting plates 2014 are connected to the support rod 102 by bolts. The connection plate 2014 not only connects adjacent reaction rods 201 to each other, but also connects the reaction rods 201 to the support rod 102. When a certain anchor point becomes loose, the reaction force can be applied to other anchor points through the reaction rods 201, sharing the force originally borne by the loose anchor point, maintaining the stability of the test device, and ensuring the accuracy of the test data.

[0019] It is worth noting that the fixing rod 203 is L-shaped along its long axis, and the buffer rod 204 is located at the upper end of the L-shaped bend of the fixing rod 203. The buffer rod 204 is arc-shaped along its long axis and is arched in shape. The material of the buffer rod 204 is spring steel. During the static load test of the pile foundation, the hydraulic jack 104 operates to lower the pressure plate 105 to apply pressure to the pile foundation. When the hydraulic rod of the hydraulic jack 104 extends close to its maximum stroke, the pressure plate 105 can press on the buffer positioning plate 205. The deformation of the arched buffer rod 204 further buffers the pressure on the pressure plate 105. The multiple sets of fixing rods 203 further limit its descent, preventing the load from exceeding the design value and damaging the pile body due to uncontrolled stroke during manual operation.

[0020] It is worth noting that the lower end of the buffer positioning plate 205 is provided with a positioning groove, and the upper end of the buffer rod 204 is located in the positioning groove. The buffer positioning plate 205 is fan-shaped and located below the pressure plate 105. The front end of the buffer positioning plate 205 is arc-shaped. Several buffer positioning plates 205 form a pile foundation positioning hole 206. Multiple fan-shaped buffer positioning plates 205 are combined to form the pile foundation positioning hole 206. Its arc-shaped front end is adapted to the shape of the pile foundation and can be accurately fitted on the outside of the pile foundation to center the load applied by the pressure plate 105, ensuring that the load is evenly transmitted to the top of the pile foundation, avoiding the pile foundation from tilting when under stress, and preventing detection errors caused by eccentric stress.

[0021] Working Principle: This embodiment provides a static load testing device for traffic engineering pile foundations. In use, the testing device is first moved above the pile foundation to be tested. The support rod 102 is fixed to the ground anchoring structure via anchor point fixing plates 103. Multiple anchor point fixing plates 103 are connected to the ground anchoring structure to form a multi-point fixed foundation. A hydraulic jack 104 is located below the reaction plate 101. The hydraulic rod of the hydraulic jack 104 passes through the hydraulic positioning hole 202 formed by the positioning part 2012 of the reaction connecting rod 201. The pressure plate 105 at the end of the hydraulic rod is aligned with the top of the pile foundation, simultaneously causing the pile foundation positioning hole 202 formed by the buffer positioning plate 205 to... 06. The device is precisely installed on the outside of the pile foundation, completing the initial installation and positioning. The test begins by activating the hydraulic jack 104. The hydraulic rod extends, causing the pressure plate 105 to descend, applying downward pressure to the pile foundation to simulate actual load conditions. During this process, the ball bearing 2015 at the front end of the positioning part 2012 contacts the hydraulic rod, converting the sliding friction of the hydraulic rod into rolling friction. This ensures stable movement of the hydraulic rod within the hydraulic positioning hole 202 in the predetermined direction while reducing frictional resistance, ensuring the accuracy of the applied test force. If any anchor point becomes loose during the test, the force originally borne by that loose anchor point will change. At this time, the reaction force... Rod 201 plays a crucial role; its V-shaped structure connects multiple support rods 102 to form a stable frame. The force on the loosened anchor point is transmitted to other unloose anchor points through the reaction rod 201. The other anchor points and the connected reaction rod 201 work together to share this force, thereby maintaining the overall stability of the test device, ensuring that the test data is not disturbed, and avoiding misjudgments of the pile foundation bearing capacity. As the hydraulic rod of the hydraulic jack 104 extends, when it approaches its maximum stroke, the pressure plate 105 will contact the buffer positioning plate 205 below. Since the buffer rod 204 is made of arched spring steel, the pressure of the pressure plate 105... The force causes the buffer rod 204 to deform, absorbing the pressure and buffering the pressure plate 105. At the same time, the L-shaped fixing rod 203 restricts the pressure plate 105 from continuing to descend, preventing the load applied to the pile foundation from exceeding the design value due to the uncontrolled stroke of the hydraulic rod, effectively protecting the pile from damage. Throughout the test, the pile foundation positioning hole 206 formed by the combination of multiple fan-shaped buffer positioning plates 205 has an arc-shaped front end that matches the shape of the pile foundation, which can accurately center the load applied by the pressure plate 105, ensuring that the load is evenly transmitted to the top of the pile foundation, avoiding the pile foundation from tilting when under stress, and further ensuring the accuracy of the test results.

[0022] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of this utility model based on the above embodiments and make different extensions and variations. However, as long as they do not depart from the spirit of this utility model, they are all within the protection scope of this utility model.

Claims

1. A static load testing device for pile foundation testing in traffic engineering, characterized in that, The system includes a reaction plate (101), a support rod (102) arranged in an array at the lower end of the reaction plate (101), and a positioning mechanism (200) arranged on the support rod (102). An anchor fixing plate (103) is installed at the end of the support rod (102). A hydraulic jack (104) is installed at the lower end of the reaction plate (101) by bolts. A pressure plate (105) is provided at the end of the hydraulic rod of the hydraulic jack (104). The positioning mechanism (200) includes a reaction connecting rod (201) arranged in an array. A fixing rod (203) is installed at the lower end of the reaction connecting rod (201). A buffer rod (204) is provided on the fixing rod (203). A buffer positioning plate (205) is provided on the buffer rod (204).

2. The static load testing device for traffic engineering pile foundations according to claim 1, characterized in that, The reaction link (201) includes two link parts (2011), which are bent and connected. The two link parts (2011) form a V-shape with the reaction link (201), and a positioning part (2012) is formed at the connection between the link parts (2011).

3. The static load testing device for traffic engineering pile foundations according to claim 2, characterized in that, The front end of the positioning part (2012) is arc-shaped, and each of the positioning parts (2012) is provided with a ball (2015). A hydraulic positioning hole (202) is formed between several positioning parts (2012). The hydraulic rod of the hydraulic jack (104) is located between several positioning parts (2012), and the ball (2015) is in contact with the hydraulic rod of the hydraulic jack (104).

4. The static load testing device for traffic engineering pile foundations according to claim 3, characterized in that, The end of the connecting rod (2011) is bent at ninety degrees and has a bending part (2013). The end of the bending part (2013) is provided with a connecting plate (2014). The adjacent connecting plates (2014) are connected to the support rod (102) by bolts.

5. The static load testing device for traffic engineering pile foundations according to claim 4, characterized in that, The fixed rod (203) is L-shaped along its long axis, and the buffer rod (204) is located at the upper end of the L-shaped bend of the fixed rod (203). The buffer rod (204) is arc-shaped along its long axis and is arch-shaped overall. The material of the buffer rod (204) is spring steel.

6. The static load testing device for traffic engineering pile foundations according to claim 5, characterized in that, The lower end of the buffer positioning plate (205) is provided with a positioning groove, the upper end of the buffer rod (204) is located in the positioning groove, the buffer positioning plate (205) is fan-shaped, the buffer positioning plate (205) is located below the pressure plate (105), the front end of the buffer positioning plate (205) is arc-shaped, and pile foundation positioning holes (206) are formed between several buffer positioning plates (205).

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