Single-pile vertical compression resistance static load test device

Abstract

The utility model discloses a single-pile vertical compression resistance static load test device, which belongs to the field of single-pile static load and comprises a pile foundation, a bearing disc perpendicular to the pile foundation is arranged above the pile foundation, the pile foundation is connected with the bearing disc through a jack, a plurality of anchor piles for fixing the bearing disc are arranged on the periphery of the pile foundation, and the anchor piles are connected with the bearing disc through a jack. The device is characterized in that the bearing disc is connected with the anchor pile through a telescopic pull rod device, and a gradienter for measuring the perpendicularity of the bearing disc is arranged above the bearing disc. Compared with the prior art, the telescopic pull rod device has the advantages that the total length of the telescopic pull rod device is changed by adjusting the connecting length of the main spiral rod and the auxiliary spiral rod of the telescopic pull rod device, when the telescopic pull rod device faces different types of pile foundations, the bearing disc located above the pile foundations can be stably connected with an anchor pile, and the anchor pile can be stably connected through the gradienter on the bearing disc. And the verticality of the weighing disc can be ensured, so that the condition of non-uniform stress cannot occur when each telescopic pull rod device is used for measurement.

Description

Technical Field

[0001] The utility model relates to the field of single pile static load, in particular to a single pile vertical compression static load test device. Background Art

[0002] Pile foundation is the foundation of the construction industry. It transfers the load of the upper building to the deep soil layer with strong bearing capacity, or compacts the soft soil layer to improve the bearing capacity and density of the foundation soil and fix the foundation of the building. Therefore, the vertical compressive static load performance of the pile foundation is one of the key factors that determine the stability of the building. In the single pile static load test, the load acting on the pile is generally provided by a reaction device. The existing pile foundation compression measurement methods often include anchor pile reaction device, weight reaction device, anchor pile weight combined reaction device, and ground anchor reaction device. Among them, the ground anchor reaction device is the most commonly used method in the single pile vertical compressive static load test device test.

[0003] The existing single pile vertical compressive static load test device fixes the bearing plate by anchor piles around the pile foundation. When the jack between the pile foundation and the bearing plate is raised, the load of the pile foundation is reversely deduced by the settlement of the pile foundation when the jack is set with a fixed force.

[0004] Although the current single pile vertical compressive static load test device can determine the load according to the settlement of the pile foundation, the pile foundation is divided into a high-cap pile foundation and a low-cap pile foundation. After the low-cap pile foundation is measured, if a high-cap pile foundation is desired, the tie rod connecting the anchor pile and the bearing plate needs to be re-determined according to the new pile foundation height. This greatly limits the measurement range of the experimental device. Utility Model Content

[0005] The technical problem to be solved by the utility model is that the pull rod of the existing single pile vertical compressive static load test device cannot adjust the appropriate fixed length according to the characteristics of the measured pile foundation.

[0006] In order to solve the above technical problems, the technical solution provided by the utility model is: a single pile vertical compressive static load test device, including a pile foundation, a bearing plate perpendicular to the pile foundation is provided above the pile foundation, the pile foundation is connected to the bearing plate by a jack, and a plurality of anchor piles for fixing the bearing plate are provided around the pile foundation, characterized in that: the bearing plate is connected to the anchor piles by a telescopic pull rod device, and a spirit level for measuring the verticality of the bearing plate is provided above the bearing plate.

[0007] As an improvement, the telescopic pull rod device includes a spiral mother rod connected to the anchor pile, a spiral sub-rod corresponding to the spiral mother rod, and a spiral sleeve for controlling the rotation of the spiral sub-rod.

[0008] As an improvement, the spiral rod is a T-shaped rod, one side of the spiral sleeve is provided with a rotating shaft hole for storing the thick column end of the spiral rod, the screw end of the spiral rod passes through the spiral sleeve, and the side of the rotating shaft hole of the spiral sleeve is provided with a closed shaft for closing the rotating shaft hole.

[0009] As an improvement, the closed shaft and the bearing plate as well as the anchor pile and the spiral female rod are connected via a pin structure, and the spiral sleeve and the closed shaft are connected via a bolt structure.

[0010] As an improvement, the output end of the jack is provided with a stabilizing pad corresponding to the bearing plate.

[0011] As an improvement, the stabilizing pad is connected to the bearing plate via a bolt structure.

[0012] The advantages of the utility model compared with the prior art are: the utility model changes the total length of the telescopic pull rod device by adjusting the connection length of the spiral mother rod and the spiral sub-rod of the telescopic pull rod device; when facing different types of pile foundations, the bearing plate above the pile foundation can be stably connected to the anchor pile; the verticality of the weighing plate can be guaranteed by the spirit level on the bearing plate, so as to ensure that each telescopic pull rod device will not be subjected to uneven force during measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The utility model discloses a general structural diagram of a single pile vertical compressive static load test device.

[0014] Figure 2 The utility model discloses an exploded diagram of a pile foundation connection of a single pile vertical compressive static load test device.

[0015] Figure 3 The utility model discloses an exploded view of a telescopic pull rod device of a single pile vertical compressive static load test device.

[0016] Figure 4 The utility model is a cross-sectional view of a telescopic pull rod device of a single pile vertical compressive static load test device.

[0017] As shown in the figure: 1. Pile foundation; 2. Load-bearing plate; 3. Jack; 31. Stabilizing pad; 4. Anchor pile; 5. Telescopic pull rod device; 51. Screw mother rod; 52. Screw sub-rod; 53. Screw sleeve; 531. Rotating shaft hole; 54. Closed shaft; 6. Level. DETAILED DESCRIPTION

[0018] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0019] As the instruction manual Figure 1 , 2As shown, it includes a pile foundation 1, a bearing plate 2 perpendicular to the pile foundation 1 is provided above the pile foundation 1, the pile foundation 1 is connected to the bearing plate 2 through a jack 3, a plurality of anchor piles 4 for fixing the bearing plate 2 are provided around the pile foundation 1, the bearing plate 2 is connected to the anchor piles 4 through a telescopic pull rod device 5, a spirit level 6 for measuring the verticality of the bearing plate 2 is provided above the bearing plate 2, the output end of the jack 3 is provided with a stabilizing pad 31 corresponding to the bearing plate 2, the stabilizing pad 31 is connected to the bearing plate 2 through a bolt structure, the spirit level 6 is used to ensure that the various parts of the bearing plate 2 are subjected to uniform and stable force, and the stabilizing pad 31 is fixed to the bearing plate 2 with screws to prevent the force point of the jack 3 from being offset, resulting in uneven force on the bearing plate 2.

[0020] As the instruction manual Figure 2 , 3 As shown in Figure 4, the telescopic pull rod device 5 includes a spiral mother rod 51 connected to the anchor pile 4, a spiral sub-rod 52 corresponding to the spiral mother rod 51, and a spiral sleeve 53 for controlling the rotation of the spiral sub-rod 52. The spiral sub-rod 52 is a T-shaped rod, and one side of the spiral sleeve 53 is provided with a rotating shaft hole 531 for storing the thick column end of the spiral sub-rod 52. The screw end of the spiral sub-rod 52 passes through the spiral sleeve 53, and the side of the rotating shaft hole 531 of the spiral sleeve 53 is provided with a closed shaft 54 ​​for closing the rotating shaft hole 531. The closed shaft 54 ​​is connected to the supporting plate 2, the anchor pile 4 and the spiral mother rod 51 through a pin structure, and the spiral sleeve 53 is connected to the closed shaft 54 ​​through a bolt structure. By adjusting the length of the spiral sub-rod 52 in the spiral mother rod 51, it is ensured that the supporting plate 2 can be fixedly connected to each anchor pile 4 at any height.

[0021] When the utility model is implemented, the pile foundation 1 is fixed in the ground, the anchor pile 4 is inserted around the pile foundation, the pin hole of the pile foundation 4 is parallel to the pin hole of the bearing plate 2, the jack 3 is placed above the center of the pile foundation 1, and the stabilizing pad 31 at the output end of the jack 3 is fixed in the screw hole of the bearing plate 2 with a screw; the threaded end of the spiral rod 52 is inserted into the rotating shaft hole 531, and the thick column end of the spiral rod 52 is located in the rotating shaft hole 531, and the screw hole of the closed shaft 54 ​​is aligned with the screw hole of the spiral sleeve 53, and the screw is used to fix it, and the spiral rod 52 is rotated into the spiral mother rod 51; the pin hole of the spiral mother rod 51 is aligned with the pin hole of the fixed plate above the anchor pile 4, and a pin is inserted to fix it, and the length of the spiral rod 52 in the spiral mother rod 51 is adjusted, and the pin hole on the side of the closed shaft 54 ​​is aligned with the pin hole on the side of the bearing plate 2, and a pin is inserted to fix it, and the same operation is performed to connect other telescopic pull rod devices 5 to the fixing frame of the bearing plate 2 and the fixing plate above each anchor pile 4.

[0022] When in use, the jack 3 is started at low power to tighten the multiple telescopic rod devices 5, then the jack 3 is closed, and the level 6 above the bearing plate 2 is observed. The bearing plate 2 is made perpendicular to the ground by adjusting the length of the telescopic rod devices 5 in all directions, and then the jack 3 is started. The settlement of the pile foundation 1 is observed through the fixing force applied by the jack 3, and the load of the pile foundation 1 is deduced. When the type of the pile foundation 1 is changed, the height of the bearing plate 2 is controlled by adjusting the length of the spiral sub-rod 52 in the spiral mother rod 51, so that the bearing plate 2 can be adjusted at any time according to the height of the top of the pile foundation 1 exposed from the ground, ensuring that the device can measure the load of various pile foundations without changing accessories.

[0023] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.

Claims

1. A single pile vertical compressive static load test device, comprising a pile foundation (1), a bearing plate (2) perpendicular to the pile foundation (1) is arranged above the pile foundation (1), the pile foundation (1) is connected to the bearing plate (2) through a jack (3), and a plurality of anchor piles (4) for fixing the bearing plate (2) are arranged around the pile foundation (1), characterized in that: The bearing plate (2) is connected to the anchor pile (4) via a telescopic pull rod device (5), and a level (6) for measuring the verticality of the bearing plate (2) is provided above the bearing plate (2).

2. A single pile vertical compressive static load test device according to claim 1, characterized in that: The telescopic pull rod device (5) comprises a spiral mother rod (51) connected to the anchor pile (4), a spiral sub-rod (52) corresponding to the spiral mother rod (51), and a spiral sleeve (53) for controlling the rotation of the spiral sub-rod (52).

3. A single pile vertical compressive static load test device according to claim 2, characterized in that: The spiral rod (52) is a T-shaped rod, and a rotating shaft hole (531) for storing the thick column end of the spiral rod (52) is provided on one side of the spiral sleeve (53). The screw end of the spiral rod (52) passes through the spiral sleeve (53), and a closing shaft (54) for closing the rotating shaft hole (531) is provided on the side of the rotating shaft hole (531) of the spiral sleeve (53).

4. A single pile vertical compressive static load test device according to claim 3, characterized in that: The closed shaft (54) is connected to the bearing plate (2) and the anchor pile (4) and the spiral female rod (51) through a pin structure, and the spiral sleeve (53) is connected to the closed shaft (54) through a bolt structure.

5. The single pile vertical compressive static load test device according to claim 1, characterized in that: The output end of the jack (3) is provided with a stabilizing pad (31) corresponding to the bearing plate (2).

6. A single pile vertical compressive static load test device according to claim 5, characterized in that: The stabilizing pad (31) is connected to the supporting plate (2) via a bolt structure.

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