Experimental device for influence of rotary excavating bored pile base sediment on foundation bearing capacity
By designing a rotary drilling pile foundation sediment experimental device, using automatic positioning and load simulation technology, the problem of low accuracy of pile foundation experimental data in the existing technology is solved, and the rapid and accurate acquisition of experimental results and load control is achieved, improving the The accuracy and reliability of the experiments were achieved.
Patent Information
- Application Number
- CN202420937796.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-30
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-04-30
AI Technical Summary
In the prior art, it is difficult to quickly and accurately understand and record the properties of sediment and sediment-free loads in indoor experiments of pile foundations. The construction of experimental equipment is troublesome and the load is inconvenient, resulting in low accuracy of the experimental results data and cannot be effectively used in practice. .
An experimental device for the influence of rotary drilling pile foundation sediment on the foundation bearing capacity is designed, including guard plates, fixing frames, load rods, displacement sensors and scale plates. By automatically positioning and simulating pile foundation load, load changes are obtained in real time. numerical values to improve experimental accuracy and detection accuracy.
It realizes a quick and accurate understanding and recording of sediment and sediment-free bearing changes, improves the accuracy and reliability of experimental results, and facilitates the construction of experimental equipment and load control.
Smart Images
Figure CN222206512U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of pile foundation experimental devices, in particular to an experimental device for the influence of rotary bored pile bottom sediment on foundation bearing capacity. Background Art
[0002] At present, the application of pile foundation in the construction field is becoming more and more extensive. Especially when some foundation soils cannot meet the requirements of upper loads and foundation treatment measures cannot be taken, pile foundations are needed for construction. Pile foundations are generally called pile foundations. They are buried relatively deep and mainly use the lower hard soil layer as the foundation. In order to transfer the load to a deeper underground, the structure is composed of different numbers of piles and caps. According to the number of piles, they can be divided into single pile foundations and pile group foundations. The load on the pile foundation is mainly borne by the pile side friction and pile end resistance. The current research on the bearing capacity of pile foundations generally adopts two research methods: theoretical research and experimental research. Because theoretical research needs to be limited by various conditions, it is very different from actual problems. This method does not conform to the actual results, so it will be carried out together with indoor experiments during the research to improve the rationality of the research.
[0003] However, in the prior art, in the current indoor experiments on pile foundations, it is difficult to quickly and accurately understand and record the load-bearing changes of piles with and without sediment at the bottom, and the experimental equipment is cumbersome to set up and it is inconvenient to change the load application, resulting in low accuracy of the experimental results of the pile foundation and making it impossible to use it in practice. Utility Model Content
[0004] The purpose of the utility model is to solve the problems in the prior art that it is difficult to quickly and accurately understand and record the load-bearing changes of pile bottoms with and without sediment, and that the experimental equipment is troublesome to set up and it is inconvenient to change the load application, resulting in low accuracy of the experimental result data of the pile foundation and inability to be used in practice. An experimental device for studying the influence of sediment at the bottom of a rotary bored pile on the bearing capacity of the foundation is proposed.
[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an experimental device for the influence of sediment at the bottom of a rotary bored pile on the bearing capacity of the foundation, comprising a guard plate, a bottom plate is installed on the bottom surface of the guard plate, a fixing frame is installed on the top surface of the guard plate, connecting grooves are opened on the bottom surfaces of both ends of the fixing frame, the inner wall of the connecting groove is movably connected to the outer wall of the guard plate, a bearing rod is movably connected through the center of the top surface of the guard plate, a load support plate is installed on the top of the bearing rod, a connecting rod is fixedly installed on the outer wall of the bearing rod, one end of the connecting rod is fixedly connected to a displacement sensor, a scale plate is fixedly connected to the top surface of one end of the fixing frame, the displacement sensor is movably sleeved on the outer wall of the scale plate, and a pressure plate is installed on the bottom end of the bearing rod.
[0006] Preferably, first locking bolts are threadedly connected to the outer walls of both ends of the fixing frame, and one end of the first locking bolt is in contact with the outer wall of the guard plate.
[0007] Preferably, the upper and lower outer walls of the guard plate are both fixedly connected to a first connecting plate, and the outer wall of the bottom plate is fixedly connected to a second connecting plate.
[0008] Preferably, a transparent plate is connected through the outer wall of the guard plate.
[0009] Preferably, the other end of the connecting rod is threadedly connected with a second locking bolt, and the outer wall of the connecting rod is provided with a slot, and the inner wall of the slot is movably connected to the outer wall of the supporting rod.
[0010] Preferably, the bearing rod comprises a splicing rod, a top surface of the splicing rod is provided with a first threaded hole, and a bottom end of the splicing rod is fixedly connected to a first threaded rod.
[0011] Preferably, a second threaded hole is formed on the top surface of the pressure plate, the first threaded rod is threadedly connected to the second threaded hole, and a second threaded rod is fixedly connected to the bottom surface of the load support plate, and the second threaded rod is threadedly connected to the first threaded hole.
[0012] Compared with the prior art, the advantages and positive effects of the utility model are:
[0013] 1. In the utility model, the bottom plate and multiple groups of guard plates are installed and constructed, and then the connecting grooves at both ends of the fixing frame are connected to the top of the guard plate, so that the bearing rod is automatically positioned in the center of the guard plate, and sediment is placed in the guard plate or no sediment is placed and a load is added to the load support plate, and the pile foundation is simulated by the bearing rod to conduct experiments. When the load of the bearing rod moves, the displacement sensor is driven to move synchronously by the connecting rod, and the load change value is obtained in real time. The utility model can be modularly spliced and constructed, and through the setting of the displacement sensor and the scale plate, the experimenter can accurately understand the change data and improve the accuracy of the experiment.
[0014] 2. In the utility model, the second locking bolt is provided to ensure a stable connection between the connecting rod and the load-bearing rod, so that the displacement sensor can more accurately detect the position change of the load-bearing rod and improve the detection accuracy. The splicing rod, the first threaded hole and the first threaded rod are provided, so that the utility model can be freely assembled to simulate pile foundations of different heights, and the load weight can be freely controlled on the load support plate, which is convenient for users to use. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 A three-dimensional structural schematic diagram of an experimental device for the influence of sediment at the bottom of a rotary bored pile on the bearing capacity of the foundation is provided in the utility model;
[0016] Figure 2 The utility model provides a schematic diagram of the internal structure of an experimental device for the influence of sediment at the bottom of a rotary bored pile on the bearing capacity of the foundation;
[0017] Figure 3 The utility model proposes an experimental device for the influence of rotary bored pile bottom sediment on foundation bearing capacity. Figure 2 A magnified view of the structure at center;
[0018] Figure 4 The utility model provides a schematic diagram of the internal structure of the bearing rod of an experimental device for testing the influence of the sediment at the base of a rotary bored pile on the bearing capacity of the foundation.
[0019] Legend: 1. Guard plate; 11. First connecting plate; 12. Transparent plate; 2. Bottom plate; 21. Second connecting plate; 3. Fixing frame; 31. Connecting groove; 32. First locking bolt; 4. Load-bearing rod; 41. Splicing rod; 42. First threaded hole; 43. First threaded rod; 5. Connecting rod; 51. Scale plate; 52. Displacement sensor; 53. Slot; 54. Second locking bolt; 6. Load support plate; 61. Second threaded rod; 7. Pressure plate; 71. Second threaded hole. DETAILED DESCRIPTION
[0020] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.
[0021] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.
[0022] Embodiment 1
[0023] like Figure 1-4 As shown, the utility model provides an experimental device for the influence of sediment at the bottom of a rotary bored pile on the bearing capacity of the foundation, comprising a guard plate 1, a bottom plate 2 is installed on the bottom surface of the guard plate 1, a fixing frame 3 is installed on the top surface of the guard plate 1, connecting grooves 31 are provided on the bottom surfaces of both ends of the fixing frame 3, the inner wall of the connecting groove 31 is movably connected to the outer wall of the guard plate 1, a bearing rod 4 is movably connected through the center of the top surface of the guard plate 1, a load support plate 6 is installed on the top of the bearing rod 4, a connecting rod 5 is fixedly installed on the outer wall of the bearing rod 4, one end of the connecting rod 5 is fixedly connected to a displacement sensor 52, a scale plate 51 is fixedly connected to the top surface of one end of the fixing frame 3, the displacement sensor 52 is movably sleeved on the outer wall of the scale plate 51, and a pressing plate 7 is installed on the bottom end of the bearing rod 4.
[0024] The specific settings and functions of this embodiment are described in detail below. The base plate 2 and multiple groups of guard plates 1 are installed and constructed, and then the connecting grooves 31 at both ends of the fixing frame 3 are connected to the top of the guard plate 1, so that the bearing rod 4 is automatically positioned at the center of the guard plate 1, and sediment is placed in the guard plate 1 or not and a load is added to the load support plate 6. The bearing rod 4 is used to simulate the pile foundation for experiments. The displacement sensor 52 is driven to move synchronously when the load of the bearing rod 4 is moved by the connecting rod 5. The load change value is obtained in real time by the movement of the displacement sensor 52 on the scale plate 51. The utility model can be modularly spliced and constructed, and through the setting of the displacement sensor 52 and the scale plate 51, the experimenter can accurately understand the change data and improve the accuracy of the experiment.
[0025] Embodiment 2
[0026] like Figure 1-4 As shown, the outer walls of both ends of the fixing frame 3 are threadedly connected with the first locking bolt 32, one end of the first locking bolt 32 is in contact with the outer wall of the guard plate 1, the upper and lower outer walls of the guard plate 1 are fixedly connected with the first connecting plate 11, the outer wall of the bottom plate 2 is fixedly connected with the second connecting plate 21, the outer wall of the guard plate 1 is threadedly connected with the transparent plate 12, the other end of the connecting rod 5 is threadedly connected with the second locking bolt 54, the outer wall of the connecting rod 5 is provided with a slot 53, the inner wall of the slot 53 is movably connected with the outer wall of the bearing rod 4, the bearing rod 4 includes a splicing rod 41, the top surface of the splicing rod 41 is provided with a first threaded hole 42, the bottom end of the splicing rod 41 is fixedly connected with the first threaded rod 43, the top surface of the pressure plate 7 is provided with a second threaded hole 71, the first threaded rod 43 is threadedly connected to the second threaded hole 71, the bottom surface of the load support plate 6 is fixedly connected with the second threaded rod 61, and the second threaded rod 61 is threadedly connected to the first threaded hole 42.
[0027] The effect achieved by the entire embodiment is that, through the provision of the first locking bolt 32, it is convenient to fix the fixing frame 3 and the guard plate 1 after being connected to prevent them from falling off; through the provision of the first connecting plate 11, it is convenient for the user to conduct simulation experiments on the connection of the guard plate 1 and the base plate 2 of different heights as needed; through the provision of the second locking bolt 54, the connecting rod 5 and the bearing rod 4 are firmly connected, which facilitates the displacement sensor 52 to more accurately detect the position change of the bearing rod 4 and improve the detection accuracy; through the provision of the splicing rod 41, the first threaded hole 42 and the first threaded rod 43, the utility model can be freely assembled, thereby simulating pile foundations of different heights and facilitating user use.
[0028] The usage method and working principle of the device: when in use, the bottom plate 2 and multiple groups of guard plates 1 are installed and constructed through the first connecting plate 11, and then the connecting grooves 31 at both ends of the fixing frame 3 are used to connect with the top of the guard plate 1, so that the bearing rod 4 is automatically positioned at the center of the guard plate 1, and by putting sediment or not putting sediment in the guard plate 1 and adding a load on the load support plate 6, the bearing rod 4 is used to simulate the pile foundation for experiments, and the displacement sensor 52 is driven to move synchronously when the load of the bearing rod 4 is moved by the connecting rod 5, and the load change value of the load sensor 52 on the scale plate 51 is obtained in real time. The utility model can be modularly spliced and constructed, and through the setting of the displacement sensor 52 and the scale plate 51, the experimenter can accurately understand the change data and improve the accuracy of the experiment.
[0029] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.
Claims
1. An experimental device for studying the influence of sediment at the bottom of a rotary bored pile on the bearing capacity of the foundation, comprising a guard plate (1), characterized in that: The bottom surface of the guard plate (1) is installed with a bottom plate (2), the top surface of the guard plate (1) is installed with a fixing frame (3), the bottom surfaces of both ends of the fixing frame (3) are provided with connecting grooves (31), the inner wall of the connecting groove (31) is movably connected to the outer wall of the guard plate (1), a bearing rod (4) is movably connected through the center of the top surface of the guard plate (1), a load support plate (6) is installed at the top end of the bearing rod (4), a connecting rod (5) is fixedly installed on the outer wall of the bearing rod (4), one end of the connecting rod (5) is fixedly connected to a displacement sensor (52), the top surface of one end of the fixing frame (3) is fixedly connected to a scale plate (51), the displacement sensor (52) is movably sleeved on the outer wall of the scale plate (51), and a pressing plate (7) is installed at the bottom end of the bearing rod (4).
2. The experimental device for measuring the influence of the sediment at the bottom of the rotary bored pile on the bearing capacity of the foundation according to claim 1, characterized in that: The outer walls at both ends of the fixing frame (3) are threadedly connected with first locking bolts (32), and one end of the first locking bolt (32) is in contact with the outer wall of the guard plate (1).
3. The experimental device for measuring the influence of sediment at the bottom of a rotary bored pile on the bearing capacity of the foundation according to claim 1, characterized in that: The upper and lower outer walls of the guard plate (1) are both fixedly connected to a first connecting plate (11), and the outer wall of the bottom plate (2) is fixedly connected to a second connecting plate (21).
4. The experimental device for measuring the influence of rotary bored pile bottom sediment on foundation bearing capacity according to claim 3, characterized in that: A transparent plate (12) is connected through the outer wall of the guard plate (1).
5. The experimental device for measuring the influence of rotary bored pile bottom sediment on foundation bearing capacity according to claim 1, characterized in that: The other end of the connecting rod (5) is threadedly connected with a second locking bolt (54), and the outer wall of the connecting rod (5) is provided with a clamping groove (53), and the inner wall of the clamping groove (53) is movably connected to the outer wall of the supporting rod (4).
6. The experimental device for measuring the influence of sediment at the bottom of a rotary bored pile on the bearing capacity of the foundation according to claim 1, characterized in that: The bearing rod (4) comprises a splicing rod (41), a first threaded hole (42) is provided on the top surface of the splicing rod (41), and a first threaded rod (43) is fixedly connected to the bottom end of the splicing rod (41).
7. The experimental device for measuring the influence of sediment at the bottom of a rotary bored pile on the bearing capacity of the foundation according to claim 6, characterized in that: A second threaded hole (71) is formed on the top surface of the pressure plate (7), and the first threaded rod (43) is threadedly connected to the second threaded hole (71); a second threaded rod (61) is fixedly connected to the bottom surface of the load support plate (6), and the second threaded rod (61) is threadedly connected to the first threaded hole (42).