Earth pressure cell with wing plates

Abstract

The utility model relates to the technical field of pressure detection, in particular to an earth pressure cell with a wing plate. Comprising an earth pressure box and a pressure box wing plate, the earth pressure box is of a cylindrical structure, a center hole is reserved in the center of the pressure box wing plate, the center hole of the pressure box wing plate is a round hole, the earth pressure box is arranged in the center hole, and the thickness of the pressure box wing plate is the same as that of the earth pressure box. The device enables the rigidity of the force measuring surface of the soil pressure box to be consistent with that of the wing plate. The structure effectively eliminates the stress concentration phenomenon caused by stiffness mutation in traditional measurement, and has remarkable technical advantages in the aspects of weakening the soil arching effect and improving the measurement precision. The utility model is mainly applied to the field of earth pressure cells with wing plates.

Description

Technical Field

[0001] This utility model relates to the field of pressure detection technology, and more specifically, to a soil pressure box with wing plates. Background Technology

[0002] Earth pressure cells are instruments used in geotechnical engineering to measure earth pressure. They come in various types, including steel wire pressure cells and oil-filled pressure cells. The most commonly used in engineering is the steel wire pressure cell. Its principle is based on the fact that the natural frequency of the steel wire changes with the tension of the wire. By measuring the change in the steel wire frequency, the change in pressure on the pressure cell membrane can be determined.

[0003] In engineering practice, the use of steel-wire pressure cells to measure vertical earth pressure in layered fill has revealed that when the overlying fill is thin (generally less than 3 meters), the measured earth pressure is close to the theoretical calculation value. However, when the overlying fill is thick (generally greater than 3 meters), the measured earth pressure is lower than the theoretical calculation value, and this difference increases with the thickness of the overlying fill. Our analysis suggests that this phenomenon is due to the localized soil arching effect of the pressure cell. The pressure cell is made of steel and has a certain thickness. The overlying soil acts on the pressure cell and the surrounding soil. The stiffness of the pressure cell is much greater than that of the soil. This difference in stiffness leads to differential settlement, with the greater the pressure, the greater the differential settlement. As the soil settles, it compacts the pressure cell area, forming a soil arch. The earth pressure measured at the top is lower than the theoretical value, similar to buried pipelines. Due to the soil arching effect, the earth pressure on the pipeline is not the weight of the overlying soil. Based on these observations, traditional earth pressure cell installations are not suitable for accurately measuring the vertical earth pressure in high embankment projects. Utility Model Content

[0004] To overcome the shortcomings of the existing technology, this utility model provides an earth pressure cell with a wing plate. This device ensures that the stiffness of the earth pressure cell's measuring surface is consistent with that of the wing plate. This structure effectively eliminates the stress concentration phenomenon caused by abrupt changes in stiffness in traditional measurements, and has significant technical advantages in reducing the soil arching effect and improving measurement accuracy.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A soil pressure box with wing plates includes a soil pressure box and pressure box wing plates. The soil pressure box adopts a cylindrical structure. A central hole is reserved at the center of the pressure box wing plate. The central hole of the pressure box wing plate is circular. The soil pressure box is disposed in the central hole. The thickness of the pressure box wing plate is the same as the thickness of the soil pressure box.

[0007] The pressure box wing plate adopts a ring-shaped structure.

[0008] The inner diameter of the central hole is matched with the diameter of the earth pressure cell.

[0009] The outer ring diameter of the pressure box wing plate is five times the diameter of the earth pressure box.

[0010] The pressure box wing plate is made of steel plate.

[0011] The outer edge of the earth pressure box is welded and fixed to the inner wall of the center hole of the pressure box wing plate.

[0012] The upper surface of the pressure box wing plate is flush with the upper surface of the earth pressure box, and the lower surface of the pressure box wing plate is flush with the lower surface of the earth pressure box.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] By matching the thickness of the pressure cell wing plate to that of the earth pressure cell, a continuous force transmission interface is constructed, ensuring that the stiffness of the earth pressure cell's measuring surface remains consistent with that of the wing plate. This structure effectively eliminates stress concentration caused by abrupt changes in stiffness in traditional measurements, promoting the uniform transmission of overlying soil pressure to the sensor. A high-strength steel plate is integrally welded to create an integrated load-bearing structure for the earth pressure cell and wing plate. This design enhances the device's resistance to lateral shear, maintaining the stability of the measurement reference surface even under complex soil deformation conditions, making it particularly suitable for harsh conditions such as high embankments and vibration loads. This device offers significant technical advantages in reducing soil arching effects and improving measurement accuracy. Attached Figure Description

[0015] Figure 1 This is a schematic diagram illustrating the use of the present invention;

[0016] Figure 2 Schematic diagram of existing earth pressure cell installation;

[0017] Figure 3 This is a schematic diagram of the pressure box wing plate structure in this invention;

[0018] Figure 4 This is a schematic diagram of the internal structure of the present invention;

[0019] In the diagram: 1 is the earth pressure cell, 2 is the pressure cell wing plate, and 3 is the center hole. Detailed Implementation

[0020] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0021] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0022] like Figures 1 to 4 As shown, an earth pressure box with a wing plate includes an earth pressure box 1 and a pressure box wing plate 2. The earth pressure box 1 adopts a cylindrical structure. A central hole 3 is reserved at the center of the pressure box wing plate 2. The central hole 3 of the pressure box wing plate 2 adopts a circular through hole structure. The earth pressure box 1 is set in the central hole 3. The thickness of the pressure box wing plate 2 is the same as the thickness of the earth pressure box 1.

[0023] Preferably, the pressure box wing plate 2 adopts a circular ring structure. The pressure box wing plate 2 is a standard circular ring structure made of Q235 cold-rolled steel plate.

[0024] Preferably, the inner diameter of the central hole 3 is matched with the diameter of the earth pressure cell 1.

[0025] Preferably, the outer ring diameter of the pressure box wing plate 2 is five times the diameter of the earth pressure box 1.

[0026] Preferably, the pressure box wing plate 2 is made of steel plate.

[0027] Preferably, the outer edge of the earth pressure box 1 is welded and fixed to the inner wall of the center hole 3 of the pressure box wing plate 2.

[0028] Preferably, the upper surface of the pressure box wing plate 2 is flush with the upper surface of the earth pressure box 1, and the lower surface of the pressure box wing plate 2 is flush with the lower surface of the earth pressure box 1.

[0029] The earth pressure box 1, with the pressure box wing plate 2 installed on the outside, is buried in the backfill to measure the earth pressure. Since the stiffness of the measuring surface of the earth pressure box 1 is basically the same as that of the external pressure box wing plate 2, the pressure box 1 deforms with the pressure box wing plate 2 under the action of the overlying backfill pressure. This reduces the conditions for the formation of the soil arch and weakens the influence of the soil arch effect. The measured earth pressure is close to the self-weight of the overlying soil.

[0030] The above description only details the preferred embodiments of the present utility model. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model, and all such changes should be included within the protection scope of the present utility model.

Claims

1. An earth pressure cell with wing plates, characterized in that: It includes an earth pressure box (1) and a pressure box wing plate (2). The earth pressure box (1) adopts a cylindrical structure. A central hole (3) is reserved at the center of the pressure box wing plate (2). The central hole (3) of the pressure box wing plate (2) adopts a circular through hole structure. The earth pressure box (1) is set in the central hole (3). The thickness of the pressure box wing plate (2) is the same as the thickness of the earth pressure box (1).

2. The earth pressure cell with wing plates according to claim 1, characterized in that: The pressure box wing plate (2) adopts a circular ring structure.

3. The earth pressure cell with wing plates according to claim 1, characterized in that: The inner diameter of the central hole (3) is matched with the diameter of the earth pressure cell (1).

4. The earth pressure cell with wing plates according to claim 1, characterized in that: The outer ring diameter of the pressure box wing plate (2) is five times the diameter of the earth pressure box (1).

5. The earth pressure cell with wing plates according to claim 1, characterized in that: The pressure box wing plate (2) is made of steel plate.

6. The earth pressure cell with wing plates according to claim 1, characterized in that: The outer edge of the earth pressure box (1) is welded and fixed to the inner wall of the center hole (3) of the pressure box wing plate (2).

7. The earth pressure cell with wing plates according to claim 1, characterized in that: The upper surface of the pressure box wing plate (2) is flush with the upper surface of the earth pressure box (1), and the lower surface of the pressure box wing plate (2) is flush with the lower surface of the earth pressure box (1).

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