Pit mouth positioning mechanism capable of adjusting levelness

Abstract

The utility model relates to the technical field of airport earthwork filling, and particularly discloses a levelness-adjustable pithead positioning mechanism which comprises a pithead positioning ring, an annular positioning plate, a positioning pin and an adjusting bolt, the annular positioning plate is fixedly sleeved at the bottom of the outer side ring wall of the pithead positioning ring, a positioning hole and a threaded hole are arranged on the annular positioning plate, and the positioning pin is arranged in the positioning hole. The adjusting bolts are arranged in the threaded holes in a threaded connection and penetrating mode and abut against the ground in a matched mode, the adjusting bolts are used for adjusting the levelness of the annular positioning plate, and the positioning pins penetrate through the positioning holes to fix the annular positioning plate to the ground. According to the utility model, the levelness adjustment and stable fixation of the pithead positioning ring can be realized, the position of the pithead positioning ring can be ensured not to deviate or incline in the process of excavating a test pit in the pithead positioning ring to carry out a detection test of an irrigation method, the pithead positioning ring can be always ensured to be horizontally placed and fixed, and the working efficiency is improved. Therefore, the detection precision and the detection progress of the test are improved, and the test pit size meets specification requirements.

Description

An adjustable level pithead positioning mechanism Technical Field

[0001] This utility model relates to the field of airport earthwork filling technology, specifically to an adjustable level pithead positioning mechanism. Background Technology

[0002] During airport earthwork construction, the conventional water injection method testing steps are as follows: select the test point – level the ground – select the excavation diameter and depth according to the fill aggregate, and place the pit positioning ring – lay a plastic film and inject water to the top of the pit positioning ring – measure the amount of water injected into the pit positioning ring – remove the plastic film and water from the pit positioning ring, excavate to the design required depth within the pit positioning ring, weigh and extract the soil sample – repair the pit walls and bottom, lay a plastic film inside the pit, inject water to the top of the pit positioning ring, and measure the volume of water injected – measure the solid volume ratio according to the test procedure, and backfill the test pit.

[0003] To ensure the accuracy and validity of the test data and to guarantee that the test pit dimensions meet the specifications, the pit opening positioning ring must remain fixed and horizontal throughout the entire test. However, conventional pit opening positioning rings are single circular rings without an effective fixing method. During testing, they are often fixed by manually stepping on them, which cannot effectively guarantee that the positioning ring will not move throughout the test. Especially during the excavation of the test pit, disturbances to the positioning ring and constant adjustments to its position by personnel can significantly affect its location. Furthermore, the horizontality of the positioning ring depends on the leveling degree of the fill surface. Due to the large leveling area and the influence of manual removal, the flatness of the positioning ring may not be good enough, requiring multiple removals for leveling or the use of a water-filling test while the ring is tilted. This affects the overall testing accuracy and progress. Summary of the Invention

[0004] The present invention aims to provide an adjustable leveling pit positioning mechanism to solve the above-mentioned technical problems.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows: an adjustable level pit opening positioning mechanism, comprising a pit opening positioning ring, an annular positioning plate, a positioning pin, and an adjusting bolt. The annular positioning plate is fixedly sleeved on the bottom of the outer ring wall of the pit opening positioning ring. The annular positioning plate is provided with a positioning hole and a threaded hole. The adjusting bolt is threaded through and installed in the threaded hole and abuts against the ground. The adjusting bolt is used to adjust the level of the annular positioning plate. The positioning pin passes through the positioning hole to fix the annular positioning plate on the ground.

[0006] Preferably, the annular positioning plate is fixedly welded to the bottom of the outer ring wall of the pit opening positioning ring.

[0007] Preferably, the ring width of the annular positioning plate is more than 5 times the ring width of the pit opening positioning ring.

[0008] Preferably, the number of positioning holes and threaded holes is the same, and the positioning holes and threaded holes are evenly and alternately arranged along the circumferential direction on the annular positioning plate.

[0009] Preferably, the threaded hole is a threaded post hole that protrudes upward from the surface of the annular positioning plate.

[0010] Preferably, the positioning hole and the threaded hole are located at the middle of the ring width of the annular positioning plate.

[0011] This utility model has the following beneficial effects:

[0012] This invention first adjusts the height of the annular positioning plate at corresponding positions by rotating adjusting bolts at different locations, thereby adjusting the levelness of the annular positioning plate and ultimately adjusting the levelness of the pit opening positioning ring. Then, the annular positioning plate is fixed to the ground by passing a positioning pin through the positioning hole, thus achieving level adjustment and stable fixation of the pit opening positioning ring. This ensures that during the water filling test in the excavated test pit within the pit opening positioning ring, the position of the pit opening positioning ring will not shift or tilt, always ensuring that the pit opening positioning ring can be placed horizontally and fixed, thereby improving the test accuracy and progress, ensuring the accuracy and validity of the test data, accurately controlling the compaction quality, ensuring the uniformity of project quality, providing accurate and effective data support for project acceptance, and ensuring that the test pit dimensions meet the specifications. Attached Figure Description

[0013] Figure 1 is a front view of an embodiment of this utility model.

[0014] Figure 2 is a cross-sectional view of section AA in Figure 1.

[0015] Figure 3 is a schematic diagram of the pit positioning ring adjusting the levelness according to an embodiment of the present invention.

[0016] Figure 4 is a schematic diagram of the installation of the pithead positioning ring.

[0017] The components include: 1. Pithead positioning ring, 2. Annular positioning plate, 3. Positioning pin, 4. Adjusting bolt, 5. Positioning hole, 6. Threaded hole, 7. Test pit, and 8. Earthwork filling. Detailed Implementation

[0018] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention and are mainly used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. Components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0019] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] Referring to Figures 1-4, as an embodiment of this utility model, an adjustable level pit positioning mechanism is provided, including a pit positioning ring 1, an annular positioning plate 2, a positioning pin 3, and an adjusting bolt 4. The annular positioning plate 2 is fixedly sleeved on the bottom of the outer ring wall of the pit positioning ring 1. The annular positioning plate 2 is provided with a positioning hole 5 and a threaded hole 6. The adjusting bolt 4 is threaded through and disposed in the threaded hole 6 and abuts against the ground. The adjusting bolt 4 is used to adjust the level of the annular positioning plate 2. The positioning pin 3 passes through the positioning hole 5 to fix the annular positioning plate 2 to the ground, thereby fixing the pit positioning ring 1 to the ground.

[0022] When testing the solid volume ratio using the water-filling method during the earthwork filling of the airport, the pithead positioning mechanism is placed on the ground. First, the height of the annular positioning plate 2 at corresponding positions is adjusted by rotating the adjusting bolts 4 at different locations, thereby adjusting the levelness of the annular positioning plate 2. Finally, the levelness of the pithead positioning ring 1 is adjusted. Then, the positioning pin 3 passes through the positioning hole 5 to fix the annular positioning plate 2 to the ground, thus achieving level adjustment and stable fixation of the pithead positioning ring 1. This ensures that during the water-filling test in the excavated test pit 7 within the pithead positioning ring 1, the position of the pithead positioning ring 1 will not shift or tilt, always ensuring that the pithead positioning ring 1 is horizontally fixed. This improves the accuracy and progress of the test, ensuring the accuracy and validity of the test data, accurately controlling the compaction quality, ensuring the uniformity of the project quality, providing accurate and effective data support for project acceptance, and ensuring that the dimensions of the test pit 7 meet the specifications.

[0023] In this embodiment, the annular positioning plate 2 is fixedly welded to the bottom of the outer ring wall of the pit opening positioning ring 1, thereby improving the connection stability between the annular positioning plate 2 and the pit opening positioning ring 1.

[0024] In this embodiment, the ring width of the annular positioning plate 2 is more than 5 times the ring width of the pit positioning ring 1, thereby ensuring that the annular positioning plate 2 has a sufficiently large fixing area and improving the fixing effect.

[0025] In this embodiment, there are four positioning holes 5 and four threaded holes 6. These holes are evenly and alternately arranged along the circumference of the annular positioning plate 2, with the angle between adjacent positioning holes 5 and threaded holes 6 being 45°. This ensures that the entire pit opening positioning mechanism can be stably fixed on the ground, and also makes the overall leveling adjustment of the pit opening positioning mechanism more precise, uniform, and reliable. Of course, there can be more than four positioning holes 5 and four threaded holes 6, such as six, which is not limited here.

[0026] In this embodiment, the threaded hole 6 is a threaded post hole that protrudes upward from the surface of the annular positioning plate 2, thereby increasing the contact area of ​​the threaded connection between the adjusting bolt 4 and the threaded post hole, ensuring the connection stability of the adjusting bolt 4 and the reliability of the level adjustment.

[0027] In this embodiment, the positioning hole 5 and the threaded hole 6 are located at the middle of the ring width of the annular positioning plate 2, so that there is a certain distance between the positioning hole 5, the threaded hole 6 and the opening of the pit positioning ring 1, so that the positioning pin 3 and the adjusting bolt 4 will not be disturbed too much during the excavation of the test pit 7 after being fixed and locked, ensuring that the excavation process is generally stable and reliable.

[0028] The size and dimensions of the pithead positioning ring 1 are determined according to the specifications and design requirements based on the maximum particle size of the fill material. The annular positioning plate 2 is processed according to the dimensions of the pithead positioning ring 1 and then fixedly welded to the bottom of the outer ring wall of the pithead positioning ring 1.

[0029] The purpose of this invention is to solve the problem of insufficient levelness and stability of the pithead positioning ring 1 during the water filling method for testing the solid volume ratio in airport earthwork filling. This invention adjusts the levelness of the pithead positioning ring 1 by rotating the adjusting screw, so that the pithead positioning ring 1 can maintain a level and be stable and reliable throughout the water filling method test, thereby improving the accuracy and effectiveness of the test data, accurately controlling the compaction quality, ensuring the uniformity of project quality, and providing accurate and effective data support for project acceptance.

[0030] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that any changes in form and detail made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims fall within the protection scope of the present invention.

Claims

1. A pit positioning mechanism for adjusting levelness, characterized by: It includes a pithead positioning ring, an annular positioning plate, a positioning pin, and an adjusting bolt. The annular positioning plate is fixedly sleeved on the bottom of the outer ring wall of the pithead positioning ring. The annular positioning plate is provided with a positioning hole and a threaded hole. The adjusting bolt is threaded through the threaded hole and abuts against the ground. The adjusting bolt is used to adjust the level of the annular positioning plate. The positioning pin passes through the positioning hole to fix the annular positioning plate to the ground.

2. The adjustable levelness pit positioning mechanism of claim 1, wherein: The annular positioning plate is fixedly welded and sleeved on the bottom of the outer ring wall of the pit opening positioning ring.

3. The adjustable leveling pit positioning mechanism according to claim 1, characterized in that: The ring width of the annular positioning plate is more than 5 times the ring width of the pit opening positioning ring.

4. The adjustable levelness pit positioning mechanism of claim 1, wherein: The number of positioning holes and threaded holes is the same, and they are evenly and alternately arranged along the circumference on the annular positioning plate.

5. The adjustable leveling pit positioning mechanism according to claim 1, characterized in that: The threaded hole is a threaded post hole that protrudes upward from the surface of the annular positioning plate.

6. The adjustable leveling pit positioning mechanism according to claim 1, characterized in that: The positioning hole and the threaded hole are located at the middle of the ring width of the annular positioning plate.

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