Measurement forced centering device installed on retaining wall

Abstract

The utility model relates to a measurement forced centering device mounted on a retaining wall, which comprises a base, positioning plates are vertically connected below two sides of the base, a forced centering screw is arranged in the middle of the upper surface of the base, and three leveling screws are distributed on the upper surface of the base on the periphery of the forced centering screw in an isosceles triangle manner by taking the forced centering screw as a center. A tubular level is further arranged on the upper surface of the base; the device has the beneficial effects that the device is mounted on the retaining wall, is not shielded by the retaining wall, is directly intervisible with the foundation pit and transmits coordinate points to the foundation pit, so that the mounting process is simple, quick, time-saving and labor-saving, the processing is simple, the stability is high, the measurement precision is ensured, the cost is low, the point selection is flexible, and the device can be repeatedly used; and more importantly, the base capable of being leveled is used and matched with the forced centering screw, so that the centering error during erection of the total station or the base and the prism is reduced, and the measurement precision is improved.

Description

Technical Field

[0001] This utility model relates to the field of construction surveying, positioning, coordinate transfer, and control measurement technology for buildings with retaining walls around the foundation pit, specifically a measurement forced centering device installed on the retaining wall. Background Technology

[0002] In subway station construction, surveying, acting as the "eyes of construction," must penetrate every work surface and corner. Before excavating the foundation pit, a closed retaining wall must be constructed around the pit to prevent rainwater from entering and causing incalculable losses. The retaining wall is approximately 1.2 meters high and 0.2 meters wide. However, the construction of this retaining wall adds a barrier to the transmission of pit coordinates and the measurement of the control network. During surveying, the measuring instruments must be set up on a tripod outside the retaining wall. When the foundation pit is deep, the retaining wall often obstructs the view, preventing the measuring instruments from establishing a line of sight with the measuring points at the bottom of the pit, thus hindering normal measurement work. Furthermore, the fixed forced centering device installed on the retaining wall is susceptible to damage during construction due to mechanical or human factors, also preventing normal measurement. Therefore, a forced centering device for measurement installed on the retaining wall is needed that is simple, quick, time-saving, labor-saving, easy to manufacture, highly stable, and ensures measurement accuracy. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this utility model provides a measurement forced centering device installed on a retaining wall, including a base, with positioning plates vertically connected to the lower sides of the base, a forced centering screw provided in the middle of the upper surface of the base, and three leveling screws arranged in an isosceles triangle around the forced centering screw on the upper surface of the base, and a tubular level also provided on the upper surface of the base.

[0004] Furthermore, a positioning screw is threaded onto the outer side of the positioning plate.

[0005] Furthermore, there are two positioning screws, which are arranged horizontally.

[0006] Furthermore, the lower end of the leveling screw is arc-shaped.

[0007] Furthermore, the upper and lower surfaces of the base are rectangular, and two tubular levels are provided, with the two tubular levels perpendicular to each other.

[0008] The beneficial effects of this utility model are as follows:

[0009] Installing the device on the retaining wall allows it to have direct line of sight to the foundation pit, transmitting coordinate points to the pit. The installation process is simple, quick, time-saving, and labor-saving. It is easy to manufacture, highly stable, ensures measurement accuracy, is inexpensive, allows for flexible point selection, and can be reused multiple times. More importantly, the use of an adjustable base and a forced centering screw reduces centering errors when setting up the total station, base, or prism, thus improving measurement accuracy. Attached Figure Description

[0010] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0011] Figure 2 This is a schematic diagram of the present invention installed on a retaining wall;

[0012] In the diagram: 1. Base; 2. Positioning plate; 21. Positioning screw; 3. Forced centering screw; 4. Leveling screw; 5. Pipe level; 6. Retaining wall. Detailed Implementation

[0013] Example 1, as Figure 1-2 As shown, a measuring forced centering device installed on a retaining wall includes a base 1, with positioning plates 2 vertically connected to the lower sides of the base 1. The positioning plates 2 on both sides are parallel to each other. A forced centering screw 3 is provided in the middle of the upper surface of the base 1, and the forced centering screw 3 is perpendicular to the upper surface of the base 1. With the forced centering screw 3 as the center, three leveling screws 4 are provided in an isosceles triangle on the upper surface of the base 1 around it. A tube level 5 is also provided on the upper surface of the base 1. The base 1 and the positioning plates 2 are made of steel plates and are connected by welding.

[0014] In this embodiment, a positioning screw 21 is threaded onto the lower outer side of the positioning plate 2; there are two positioning screws 21, which are horizontally arranged. After the positioning plates 2 on both sides of the base 1 are inserted into the retaining wall, and after the base 1 is leveled, the positioning screws 21 on both sides of the positioning plate 2 can be tightened to fix the base.

[0015] In this embodiment, the lower end of the leveling screw 4 is arc-shaped. When the device is installed on the retaining wall and the base 1 is leveled by the leveling screw 4, the lower end of the leveling screw 4 is arc-shaped, which means that the contact area between the lower end of the leveling screw 4 and the upper surface of the retaining wall is very small, reducing the resistance during rotation and facilitating the rotation adjustment of the leveling screw 4.

[0016] In this embodiment, the upper and lower surfaces of the base 1 are rectangular, and two tubular levels 5 are provided, with the two tubular levels 5 being perpendicular to each other. That is, the two tubular levels 5 are parallel to the two adjacent sides of the rectangular surface. When the upper surface of the base 1 is initially leveled by the leveling screw 4, the two perpendicular tubular levels 5 can more accurately reflect the horizontal state of the upper surface of the base 1, making leveling easier.

[0017] The method of using this utility model is as follows:

[0018] Positioning plates 2 on both sides of the base 1 of this device are inserted into the sides of the retaining wall, and the lower ends of the three leveling screws 4 are brought into contact with the upper surface of the retaining wall to stop the device on the upper surface of the retaining wall. Then, rotate the three leveling screws 4 to center the horizontal bubbles of the two tube levels 5, thus completing the coarse adjustment of the device. Finally, fix the device with the positioning screws 21 to complete the setup of the device. During the later measurement, simply adjust the prism or measuring instrument set on the forced centering screw 3 for further precision leveling before starting the measurement work. After completing the measurement task, loosen the positioning screws 21 to remove the device and store it for future use.

[0019] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the invention. It should be understood that the above descriptions are merely specific embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A measuring forced alignment device installed on a retaining wall, characterized in that: Includes a base (1), with positioning plates (2) vertically connected to the lower sides of the base (1), and a forced centering screw (3) provided in the middle of the upper surface of the base (1). With the forced centering screw (3) as the center, the upper surface of the base (1) is distributed in an isosceles triangle and is provided with three leveling screws (4). The upper surface of the base (1) is also provided with a tubular level (5).

2. The measuring forced alignment device installed on a retaining wall according to claim 1, characterized in that: The outer side of the positioning plate (2) is threaded with a positioning screw (21).

3. A measuring forced alignment device installed on a retaining wall according to claim 2, characterized in that: There are two positioning screws (21), and the two positioning screws (21) are arranged horizontally.

4. A measuring forced alignment device installed on a retaining wall according to claim 1, characterized in that: The lower end of the leveling screw (4) is arc-shaped.

5. A measuring forced alignment device installed on a retaining wall according to claim 1, characterized in that: The upper and lower surfaces of the base (1) are rectangular, and two tube levels (5) are provided, with the two tube levels (5) being perpendicular to each other.

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