Dynamic balance type single-pile vertical uplift static load test device

Abstract

The utility model relates to the field of foundation engineering test equipment, in particular to a dynamic balance type single-pile vertical anti-pulling static load test device which is provided with an angle adjusting mechanism and a counter-force mechanism, a shell is placed on a construction plane, and a rotating shaft is arranged in the shell; the placing platform is arranged in the shell, the shaft hole is formed in the side face of the placing platform, and the rotating shaft penetrates through the placing platform through the shaft hole. The counter-force steel beam is placed on the placing platform; the center hole jack is placed in the center of the counter-force steel beam; the main beam is placed above the center hole jack; the load disc is located below the counter-force steel beam. The base is positioned below the loading disc; the lower pulling blocks are located below the base, the upper pulling blocks are located above the main beams, and the lower pulling blocks are connected through the steel strands. And the main rib is positioned below the pull-down block and is hinged with the load disc. The angle of the device can be adjusted through the mechanisms so as to adapt to foundations with different gradients.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of foundation engineering test equipment, concretely relates to a dynamic balance type single pile vertical uplift static load test device. BACKGROUND

[0002] In the building construction process, in order to ensure the quality of pile foundation engineering, it is necessary to detect the bearing capacity of single pile. But there are some test sites on the top of the mountain with large slope, so a vertical uplift static load test device suitable for such complex terrain is needed.

[0003] Chinese patent CN111608212A discloses a hydraulic self-balancing type single pile vertical uplift static load test. The hydraulic self-balancing type single pile vertical uplift static load test device applies vertical upward force through a counterforce mechanism and a hydraulic jack, uses a through core jack and a steel strand to uniformly transmit the force to the main reinforcement of the test pile, realizes step loading and dynamic balance. When the through core jack exceeds the set pressure limit value, it will automatically release pressure and allow the steel strand to produce vertical displacement, and the jack that has not reached the pressure limit value continues to pull the main reinforcement until it reaches the pressure limit value and also automatically releases pressure. This cycle ensures uniform distribution of force between the main reinforcement, reduces test errors, and is suitable for detection of different pile types and diameters, simple operation and low cost. However, it does not consider the case of testing on a foundation with a large slope.

[0004] Therefore, a adjusting mechanism is needed to adjust the angle of the test device to adapt to different slopes, and a fixing mechanism is also needed to fix the test device after adjusting the angle to prevent the test device from deviating or even overturning during operation. SUMMARY

[0005] To solve the above problems, a dynamic balance type single pile vertical uplift static load test device is provided, which adds an angle adjusting mechanism to solve the problem of inconvenient testing of the vertical uplift static load test device on a foundation with a large slope.

[0006] In order to solve the prior art problems, the utility model provides a dynamic balance formula single pile vertical anti -pull static load test device, including angle adjusting mechanism and counterforce mechanism, angle adjusting mechanism includes casing, pivot, placing platform and axle hole, the casing is placed in construction plane, and the pivot is arranged in the casing, the placing platform is arranged in the casing, the axle hole is opened in the side of placing platform, and the pivot is arranged in the placing platform through the axle hole, the counterforce mechanism includes counterforce steel beam, through core jack, main beam, load disc, base, lower pull block, upper pull block and main reinforcement, the counterforce steel beam is placed on the placing platform, the through core jack is placed in the central position of counterforce steel beam, the main beam is placed above the through core jack, the load disc is below the counterforce steel beam, the base is below the load disc, the lower pull block is below the base, the upper pull block is above the main beam, and the lower pull block is connected with the lower pull block through the wire strand, and the main reinforcement is below the lower pull block and is hinged with the load disc.

[0007] Preferably, a plurality of insertion holes are formed on the load disc at equal angles along the circular edge direction, and the main reinforcement is inserted into the insertion holes and hinged with the load disc.

[0008] Preferably, a support column is arranged between the counterforce steel beam and the main beam, and when the through core jack is removed, the support column provides support for the main beam.

[0009] Preferably, a positioning mechanism is arranged between the counterforce steel beam, the main beam and the through core jack, and the positioning mechanism comprises positioning blocks and a through hole arranged at the center of the through core jack.

[0010] Preferably, the base is designed as a grid, and the main reinforcement is inserted into the grid of the base and hinged with the load disc.

[0011] Preferably, a fixing mechanism is arranged on the placing platform, and the fixing mechanism comprises through holes and fixing rods, the through holes are arranged at the four corners of the placing platform, the fixing rods are inserted into the ground of the working plane through the through holes and arranged in the placing platform, and a hollow is formed at the bottom of the casing for the fixing rods.

[0012] The utility model has the beneficial effects compared with the prior art:

[0013] 1. The angle adjusting mechanism can adapt to the initial slope of the foundation, and the problem that most of the devices in the prior art do not consider the slope of the foundation is solved.

[0014] 2. The load disc is designed to have a plurality of insertion holes at equal angles along the direction of its circular edge, so that the main reinforcement can be articulated with the load disc from multiple directions, realizing multi-directional force transmission and uniform dispersion. This design ensures that the load disc can effectively distribute the force evenly to the main reinforcement when the vertical force is applied, avoiding local stress concentration, and at the same time, the articulated mode allows the main reinforcement to have a certain degree of rotational freedom when subjected to stress, reducing the additional stress caused by excessive fixation, and improving the safety and accuracy of the test.

[0015] 3. The utility model discloses a support column between counterforce steel beam and main beam, when the through core jack is taken out, the support column provides support for the main beam, keeps the main beam position and attitude. The device ensures that the main beam can still keep correct position and attitude under the condition that the through core jack is removed, enhances the rigidity and strength of the whole counterforce mechanism, guarantees the stability and reliability in the test process. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a kind of dynamic balance formula single pile vertical anti-pulling static load test device's perspective diagram.

[0017] Figure 2 It is a kind of dynamic balance formula single pile vertical anti-pulling static load test device's front view.

[0018] Figure 3 It is a kind of dynamic balance formula single pile vertical anti-pulling static load test device's angle adjusting mechanism's perspective diagram.

[0019] Figure 4 It is a kind of dynamic balance formula single pile vertical anti-pulling static load test device's angle adjusting mechanism's structure exploded view.

[0020] Figure 5 It is a kind of dynamic balance formula single pile vertical anti-pulling static load test device's counterforce mechanism's structure exploded view.

[0021] Figure 6 It is a kind of dynamic balance formula single pile vertical anti-pulling static load test device's base and down block's perspective diagram.

[0022] Marked in the figure is: 1, angle adjusting mechanism;11, shell;111, pivot;12, placement platform;121, shaft hole;2, counterforce mechanism;21, counterforce steel beam;22, main beam;23, through core jack;24, main reinforcement;25, load disc;251, insertion hole;26, base;27, down block;28, up block;3, support column;4, positioning mechanism;41, positioning block;5, fixed mechanism;51, via hole;52, fixed insertion rod. DETAILED DESCRIPTION

[0023] In order to further understand the features, technical means and specific purposes and functions achieved by the utility model, the utility model will be described in further detail below in combination with the drawings and specific embodiments.

[0024] Referring to Figures 1-6 As shown in the figure: a dynamic balance type single pile vertical uplift static load test device, including angle adjusting mechanism 1 and counterforce mechanism 2, the angle adjusting mechanism 1 includes shell 11, pivot 111, placement platform 12 and shaft hole 121;The shell 11 is placed on the construction plane, and the pivot 111 is arranged inside the shell 11;The placement platform 12 is arranged inside the shell 11, the shaft hole 121 is opened on the side of the placement platform 12, and the pivot 111 is arranged in the placement platform 12 through the shaft hole 121;The counterforce mechanism 2 includes counterforce steel beam 21, through core jack 23, main beam 22, load disc 25, base 26, lower pull block 27, upper pull block 28 and main reinforcement 24;The counterforce steel beam 21 is placed on the placement platform 12;The through core jack 23 is placed at the center position of the counterforce steel beam 21;The main beam 22 is placed above the through core jack 23;The load disc 25 is located below the counterforce steel beam 21;The base 26 is located below the load disc 25;The lower pull block 27 is located below the base 26, the upper pull block 28 is located above the main beam 22, and the lower pull block 27 and the lower pull block 27 are connected through the steel strand;The main reinforcement 24 is located below the lower pull block 27 and is hinged to the load disc 25.

[0025] In the prior art, most of the devices do not consider that the foundation initially has a certain slope, so when the test is carried out in the mountainous area with large slope, a large amount of manpower and material resources may be needed, and for this purpose, the shell 11 is placed on the construction plane, and the placement platform 12 and the shell 11 can rotate, so that the angle thereof can be adjusted by rotating the placement platform 12 to adapt to different construction conditions and test requirements. During the test, the vertical uplift force is applied through the through core jack 23, the main beam 22 and the counterforce steel beam 21 bear the counterforce, the load disc 25 is responsible for transmitting the vertical uplift force of the through core jack 23 to the main reinforcement 24, the steel strand is connected between the lower pull block 27 and the upper pull block 28, which provides stable support for the load disc 25 and also realizes force transmission and balance, and the whole device realizes accurate test and dynamic balance control of the vertical uplift force of the single pile through the interaction of the above components.

[0026] Referring to Figure 6 As shown in the figure: a dynamic balance type single pile vertical uplift static load test device, including angle adjusting mechanism 1 and counterforce mechanism 2, the angle adjusting mechanism 1 includes shell 11, pivot 111, placement platform 12 and shaft hole 121;The shell 11 is placed on the construction plane, and the pivot 111 is arranged inside the shell 11;The placement platform 12 is arranged inside the shell 11, the shaft hole 121 is opened on the side of the placement platform 12, and the pivot 111 is arranged in the placement platform 12 through the shaft hole 121;The counterforce mechanism 2 includes counterforce steel beam 21, through core jack 23, main beam 22, load disc 25, base 26, lower pull block 27, upper pull block 28 and main reinforcement 24;The counterforce steel beam 21 is placed on the placement platform 12;The through core jack 23 is placed at the center position of the counterforce steel beam 21;The main beam 22 is placed above the through core jack 23;The load disc 25 is located below the counterforce steel beam 21;The base 26 is located below the load disc 25;The lower pull block 27 is located below the base 26, the upper pull block 28 is located above the main beam 22, and the lower pull block 27 and the lower pull block 27 are connected through the steel strand;The main reinforcement 24 is located below the lower pull block 27 and is hinged to the load disc 25.

[0027] The main reinforcement 24 passes through the insertion hole 251 on the load disc 25, so that the main reinforcement 24 can be articulated with the load disc 25 in multiple directions, thereby realizing multi-directional transmission and uniform dispersion of force. When vertical uplift resistance testing is performed, it can be ensured that the load disc 25 can effectively uniformly distribute force to the main reinforcement 24 when a vertical force is applied, avoiding local stress concentration, and at the same time, the articulated manner allows the main reinforcement 24 to have a certain degree of rotational freedom when stressed, thereby reducing additional stress caused by excessive fixation.

[0028] Referring to Figures 1-5 It is shown that the support column 3 is arranged between the counterforce steel beam 21 and the main beam 22, and when the through-rod jack 23 is removed, the support column 3 provides support for the main beam 22.

[0029] When the through-rod jack 23 is not in place, the support column 3 immediately intervenes to provide the necessary support force for the main beam 22, preventing the main beam 22 from being displaced due to the loss of support, thereby ensuring that the main beam 22 can still maintain the correct position and posture under the condition that the through-rod jack 23 is removed, and ensuring the rigidity and strength of the entire counterforce mechanism 2.

[0030] Referring to Figure 5 It is shown that the positioning mechanism 4 is arranged between the counterforce steel beam 21, the main beam 22 and the through-rod jack 23; the positioning mechanism 4 comprises a positioning block 41 and a through-hole arranged at the center of the through-rod jack 23; the positioning block 41 is arranged at the center of the opposite surface of the counterforce steel beam 21 and the main beam 22; and the positioning block 41 is arranged in the through-rod jack 23 through the through-hole.

[0031] The positioning mechanism 4 ensures accurate alignment and stable operation between the counterforce steel beam 21, the main beam 22 and the through-rod jack 23. The through-rod jack 23 is accurately positioned at the center of the counterforce steel beam 21 and the main beam 22 through the positioning block 41, and the alignment of the main beam 22 and the counterforce steel beam 21 is ensured. This makes the transmission path of the force remain straight when the through-rod jack 23 applies a vertical force, reduces the influence of the deviated force, and improves the accuracy of the test. When the through-rod jack 23 is removed or installed, the positioning block 41 and the through-hole arranged at the center of the through-rod jack 23 provide a convenient guiding effect, simplify the assembly process, and ensure the repeatability and reliability of the device.

[0032] Referring to Figure 5 and Figure 6 It is shown that the base 26 is designed as a grid, and the main reinforcement 24 passes through the grid of the base 26 and is articulated with the load disc 25.

[0033] The grid design makes the arrangement of the main reinforcement 24 more flexible, and facilitates the adjustment of the position of the main reinforcement 24 to adapt to different testing requirements. At the same time, the grid structure provides sufficient strength and stability to ensure that the base 26 will not deform or be damaged when a vertical uplift force is applied.

[0034] Referring to Figures 1-4 As shown: the placement platform 12 is provided with a fixing mechanism 5; the fixing mechanism 5 comprises through holes 51 and fixed insertion rods 52; the through holes 51 are located at the four corners of the placement platform 12; the fixed insertion rods 52 are arranged in the placement platform 12 through the through holes 51 and are inserted into the ground of the working plane; the bottom of the shell 11 is provided with cavities for the insertion rods to pass through.

[0035] The fixed insertion rods 52 pass through the placement platform 12 and are inserted into the ground of the working plane, so as to fix the angle of the placement platform 12. The bottom of the shell 11 is provided with cavities, so that the fixed insertion rods 52 can smoothly pass through and be inserted into the ground, thereby enhancing the stability of the entire device during the single pile vertical uplift static load test, preventing displacement or overturning due to stress, and ensuring the safety of the test process and the accuracy of the results.

[0036] The utility model discloses a vertical angle adjusting mechanism and counterforce mechanism cooperate, realize accurate vertical uplift resistance test. Angle adjusting mechanism 1 is by shell 11, pivot 111, the platform 12 of placing and shaft hole 121 is formed, and shell 11 is placed on the construction plane, and pivot 111 is located inside shell 11, and the platform 12 of placing is arranged in shell 11 and shaft hole 121 is opened in its side, and pivot 111 is connected with the platform 12 of placing through shaft hole 121, and the platform 12 of placing is allowed to rotate and adjust angle, to adapt to the foundation of different gradient. Counterforce mechanism 2 includes counterforce steel beam 21, through core jack 23, main beam 22, load disc 25, base 26, pull-down block 27, pull-up block 28 and main reinforcement 24, and counterforce steel beam 21 is placed on the platform 12 of placing, and through core jack 23 is located in the center, and main beam 22 is located above through core jack 23, and load disc 25 is located below counterforce steel beam 21, and base 26 is located below load disc 25, and pull-down block 27 is located below base 26, and pull-up block 28 is located above main beam 22, and pull-down block 27 is connected with pull-up block 28 through wire rope, and main reinforcement 24 is located below pull-down block 27 and is hinged with load disc 25, realizes the transmission and balance of force. Load disc 25 is provided with a plurality of through holes 251 along the direction of the circular edge at equal angles, and main reinforcement 24 passes through the through holes 251 and is hinged to the load disc 25, realizing multi-angle force transmission and dispersion. Support column 3 is arranged between counterforce steel beam 21 and main beam 22, when through core jack 23 is taken out, support column 3 provides support for main beam 22, and keeps the position and posture of main beam 22. Positioning mechanism 4 includes positioning block 41 and through hole in the center position of through core jack 23, positioning block 41 is arranged in the center position on the opposite surface of counterforce steel beam 21 and main beam 22, and is connected with through core jack 23 through the through hole, ensuring accurate alignment and stable work of each component. Base 26 is designed as a grid, and main reinforcement 24 passes through the grid of base 26 and is hinged to load disc 25, providing flexible arrangement and sufficient strength. The fixing mechanism 5 is arranged on the platform 12 of placing, including through hole 51 and fixed insertion rod 52, the through hole 51 is opened in the four corners of the platform 12 of placing, and the fixed insertion rod 52 is arranged in the platform 12 of placing through the through hole 51 and is inserted into the ground, and the bottom of shell 11 is provided with a hollow for the insertion rod to pass out, realizing the fixation of the platform 12 of placing, enhancing the stability of the device, preventing displacement or overturning during the test process, ensuring the safety of the test and the accuracy of the results.

[0037] The above embodiments only express one or several embodiments of the utility model, and the description is more specific and detailed, but it can not be understood as the limitation of the scope of the utility model. It should be pointed out that for ordinary skilled person in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which belong to the protection scope of the utility model. Therefore, the protection scope of the utility model should be subject to the appended claims.

Claims

1. A dynamic equilibrium type single pile vertical pull-out static load test device, characterized in that: It includes an angle adjustment mechanism (1) and a reaction mechanism (2); The angle adjustment mechanism (1) includes a housing (11), a rotating shaft (111), a placement platform (12), and a shaft hole (121). The housing (11) is placed on the ground, and the rotating shaft (111) is located inside the housing (11); The placement platform (12) is located inside the housing (11), and the shaft hole (121) is opened on the side of the placement platform (12). The rotating shaft (111) passes through the shaft hole (121) and is inserted into the placement platform (12). The reaction mechanism (2) includes a reaction steel beam (21), a through-hole jack (23), a main beam (22), a load plate (25), a base (26), a pull-down block (27), an pull-up block (28), and a main reinforcement (24). The reaction steel beam (21) is placed on the placement platform (12); The through-hole jack (23) is placed at the center of the reaction steel beam (21); The main beam (22) is placed above the through-hole jack (23); The load disk (25) is located below the reaction steel beam (21); The base (26) is located below the load disk (25); The pull-down block (27) is located below the base (26), the pull-up block (28) is located above the main beam (22), and the pull-down block (27) is connected to the pull-up block (28) by steel strands; The main rib (24) is located below the pull-down block (27) and is hinged to the load plate (25).

2. The dynamic equilibrium type single pile vertical pull-out static load test device according to claim 1, characterized in that, The load disk (25) has several through holes (251) at equal angles along its circular edge direction. The main rib (24) passes through the through holes (251) and is hinged to the load disk (25).

3. The dynamic equilibrium type single pile vertical pull-out static load test device according to claim 1, characterized in that, A support column (3) is provided between the reaction steel beam (21) and the main beam (22). When the through jack (23) is removed, the support column (3) provides support for the main beam (22).

4. The dynamic equilibrium type single pile vertical pull-out static load test device according to claim 1, characterized in that, A positioning mechanism (4) is provided between the reaction steel beam (21), the main beam (22) and the through jack (23); The positioning mechanism (4) includes a positioning block (41) and a through hole located at the center of the through jack (23); The positioning block (41) is located at the center of the opposite surfaces of the reaction steel beam (21) and the main beam (22); The positioning block (41) is inserted into the through-hole jack (23).

5. The dynamic equilibrium type single pile vertical pull-out static load test device according to claim 1, characterized in that, The base (26) is a grid design, and the main rib (24) passes through the grid of the base (26) and is hinged to the load plate (25).

6. The dynamic equilibrium type single pile vertical pull-out static load test device according to claim 1, characterized in that, The placement platform (12) is equipped with a fixing mechanism (5); The fixing mechanism (5) includes a through hole (51) and a fixing rod (52); The vias (51) are located at the four corners of the placement platform (12); The fixed insertion rod (52) is inserted into the placement platform (12) through the through hole (51) and into the ground of the working plane; The bottom of the housing (11) has a hole for the insertion rod to pass through.

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