CN217878120U

CN217878120U - Horizontal soil pressure monitoring device

Info

Publication number: CN217878120U
Application number: CN202222288562.3U
Authority: CN
Inventors: 宋建学; 董丽丽; 张宸; 李永明; 韩学威; 侯新明; 张东晓; 刘达; 刘涵鑫; 周通
Original assignee: Zhengzhou University
Current assignee: Zhengzhou University
Priority date: 2022-08-30
Filing date: 2022-08-30
Publication date: 2022-11-22
Anticipated expiration: 2032-08-30

Abstract

The application discloses a horizontal soil pressure monitoring device, which aims to solve the technical problems that the operation steps of horizontally laying soil pressure boxes are complex, the soil pressure boxes are easy to damage, the burying position is easy to change and the measurement precision is inaccurate; the device comprises a fixed plate, a soil pressure box and a signal transmission pipe, wherein the soil pressure box and the signal transmission pipe are arranged on the fixed plate; the signal transmission pipes are arranged on two sides of the fixed plate, the fixed plate is of a U-shaped structure, and transverse clapboards are correspondingly arranged right below the soil pressure box to support the soil pressure box; the utility model discloses operating procedure is simple, prevents effectively that soil pressure cell from burying the in-process and easily causing its damage, displacement and the unsafe problem of measurement accuracy.

Description

Horizontal soil pressure monitoring device

Technical Field

The utility model relates to a road bed engineering monitoring facilities technical field, concretely relates to horizontal soil pressure monitoring device.

Background

The soil pressure cell is a common device for testing soil stress on site, and is widely applied to the field of rock mass engineering such as slopes, roadbeds, foundation pits and the like. The self development of the sensor is gradually mature, the most commonly used vibrating wire type sensor at present has the advantages of high sensitivity, high precision, good stability, relatively low price and the like, and the sensor can be buried in soil bodies such as retaining walls, anti-slide piles, earth dikes, buildings, slopes, roadbed and the like, and can perform long-term test on the change of internal stress. The soil pressure cell is often arranged along the vertical direction or the horizontal direction, and the stress value of the soil body in the horizontal direction and the vertical direction is respectively tested. In engineering practice, the change of the lateral stress of the soil body is considered, so most of the soil pressure boxes are vertically arranged. However, in the field of engineering such as side slopes and roadbed, the stress change of the soil body generated in the vertical direction during deformation of the soil body is often required to be tested, and therefore the soil pressure box is required to be arranged along the horizontal direction.

The burying of the soil pressure cell requires that the stress surface is in good contact with the soil body, and the other surface opposite to the stress surface is relatively fixed and does not displace. This requires that the fixing surface of the soil pressure cell be attached to a fixed body during the burying process, so as to achieve the effect of stability. For a vertically arranged soil pressure cell, the soil pressure cell is often installed by means of a pile body and other relative immovable bodies. The soil pressure box can be directly attached to the surface of the structure, so that good parameter values can be obtained. For the soil pressure boxes arranged horizontally, especially in the areas of roadbed, side slope and the like, a special fixing device is usually required to be manufactured to ensure the relative fixation of the fixing surfaces of the soil pressure boxes, so that the soil pressure boxes can well play a role.

The existing horizontal soil pressure box has the following three installation modes, taking an underground continuous wall as an example:

(1) A drilling method, wherein holes are drilled in the soil behind the wall close to the underground diaphragm wall, and then the calibrated soil pressure box is placed in the drilled holes and is filled with fine sand; however, in the drilling process in the soft soil area, hole wall collapse may occur, so that the soil pressure cell cannot be smoothly buried into the preset position, and additionally, the backfilled fine sand is not an original soil body, which may cause measurement result errors.

(2) The cloth hanging method is characterized in that a rated soil pressure box is fixed on the hanging cloth of a reinforcing cage of a supporting structure, the soil pressure box is pushed forwards on the outer wall of a soil body by means of concrete pressure at the position of a descending groove wall, however, cement paste in the concrete easily enters between the soil pressure box and the soil body in the concrete pouring process, and the soil pressure box is wrapped by the cement paste and damaged.

(3) The air pressure method is characterized in that a calibrated soil pressure box is fixed on an air pressure piece and then is arranged on a steel frame, air pressure is respectively applied to the interfaces of each instrument piece in the groove below the concrete pouring front, so that the soil pressure box is fixed on the wall of the groove, the pressure is relieved after the concrete pouring is finished, and the soil pressure box is permanently fixed on the wall of the wall by using the pressure of the concrete.

The information disclosed in this background section is only for enhancement of understanding of the background of the disclosure and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art that is known to a person skilled in the art.

Disclosure of Invention

In view of at least one of the above technical problems, the present disclosure provides a horizontal soil pressure monitoring device, in the process of pressing down a fixing plate, a diaphragm plate firstly contacts and cuts a soil body, so as to effectively ensure that a soil pressure box is not damaged, and ensure that the burying position of the soil pressure box is fixed.

According to one aspect of the present disclosure, a horizontal soil pressure monitoring device is provided, which includes a fixing plate, a soil pressure box mounted on the fixing plate, and a signal transmission pipe; the signal transmission pipes are arranged on two sides of the fixing plate, the fixing plate is of a U-shaped structure, and a transverse partition plate is correspondingly arranged right below the soil pressure box to support the soil pressure box.

In some embodiments of the present disclosure, a protruding length of the diaphragm plate in a direction perpendicular to the fixing plate is not less than a protruding length of the soil pressure cell in a direction perpendicular to the fixing plate.

In some embodiments of the present disclosure, a rubber membrane layer is disposed on a surface of the soil pressure cell.

In some embodiments of the present disclosure, the rubber film layer has a thickness of 1 to 2mm.

In some embodiments of the present disclosure, the signal transmission tube is a PVC tube, and the diameter of the signal transmission tube is not smaller than the diameter of the wire of the soil pressure cell, so that the wire of the soil pressure cell is inserted into the PVC tube.

One or more technical solutions provided in the embodiments of the present application have at least any one of the following technical effects or advantages:

1. the soil pressure cell is arranged on the fixing plate, the transverse partition plate is arranged under the fixing plate, the width of the transverse partition plate is larger than the thickness of the soil pressure cell, and in the process that the fixing plate presses downwards, the transverse partition plate firstly contacts and cuts soil, so that the soil pressure cell is effectively prevented from being damaged, and the burying position of the soil pressure cell is guaranteed to be fixed.

2. A1-2 mm rubber film layer is arranged on the surface of the soil pressure cell to protect the soil pressure cell, prolong the service life of the soil pressure cell and reduce the failure rate.

3. PVC hoses are arranged on two sides of the corner of the U-shaped fixing plate, so that a lead of the soil pressure cell can be led to the measuring and reading instrument through the PVC hoses, and the lead is protected to be damaged when the fixing plate is pressed down.

Drawings

Fig. 1 is a schematic plan view of a horizontal soil pressure monitoring device according to an embodiment of the present disclosure.

Fig. 2 is a schematic cross-sectional view of a horizontal soil pressure monitoring device according to an embodiment of the present disclosure.

In the above figures, 1, a fixing plate; 2. a soil pressure cell; 3. a diaphragm plate 4 and a PVC hose.

Detailed Description

In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "vertical", "horizontal", "clockwise", "counterclockwise", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present application and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present application.

The embodiment of the application provides a horizontal soil pressure monitoring device, and solves the technical problems that the operation steps of horizontally arranging the soil pressure boxes are complex, the soil pressure boxes are easy to damage, the embedding positions are easy to change, and the measurement precision is inaccurate.

Technical scheme in the embodiment of this application is for solving the aforesaid problem of laying horizontal soil pressure cell, and the general thinking is as follows:

the soil pressure box is fixedly arranged on the fixing plate, the transverse partition plate is arranged under the soil pressure box, and the arrangement width of the transverse partition plate is larger than that of the soil pressure box, so that the transverse partition plate cuts soil firstly when the soil pressure box is arranged downwards, and the influence of the soil on the position deviation of the soil pressure box is prevented.

The both sides of fixed plate set up the PVC hose respectively along vertical direction to on passing through PVC hose UNICOM to the survey and reading appearance with the wire of soil pressure cell, be favorable to protecting the wire and cause the damage to the wire when preventing to push down the fixed plate.

In order to better understand the technical scheme of the application, the technical scheme is described in detail in the following with reference to the accompanying drawings and specific embodiments.

Example one

The example discloses a horizontal soil pressure monitoring device, which is shown in fig. 1-2 and comprises a fixed plate 1, a soil pressure box 2 arranged on the fixed plate 1 and a signal transmission pipe.

The fixing plate 1 is a U-shaped steel plate, so that the structural stability of the fixing plate can be kept and the fixing plate can be prevented from being deformed due to stress when the fixing plate is buried downwards; the soil pressure box 2 is fixed on the fixing plate 1, and is of a CK-TJ29 type vibration string type; a transverse partition plate 3 is arranged right below the soil pressure box 2, the transverse partition plate 3 is connected with the bottom of the soil pressure box 2 to support and fix the soil pressure box, the transverse partition plate 3 is arranged along the horizontal direction, the length of the transverse partition plate is equal to the width of the U-shaped groove of the fixing plate 1, the width of the transverse partition plate is larger than the thickness of the soil pressure box 2, the width of the transverse partition plate is larger than 23-4 mm of the soil pressure box, the thickness of the transverse partition plate is about 10mm, and the transverse partition plate is made of square steel plates; in the process of embedding the fixing plate 1, the diaphragm plate 3 can cut soil firstly, so that the soil pressure box 2 is prevented from shifting due to the thrust of the soil to the soil pressure box 2 in the downward process.

And signal transmission pipes are fixed on two sides of the fixing plate 1 through epoxy resin glue and used for conducting wires of the soil pressure box 2 to be connected with the measuring and reading instrument, the signal transmission pipes are made of PVC (polyvinyl chloride) hoses 4 and are hollow inside, and the pipe diameter of each signal transmission pipe is slightly larger than the wire diameter of the wires in the soil pressure box 2, so that the wires are prevented from being damaged in the embedding process of the fixing plate 1.

And a rubber film is covered on the surface of the soil pressure cell 2 to protect the soil pressure cell, so that the service life of the soil pressure cell is prolonged, and the failure rate is reduced.

Although preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the appended claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various changes and modifications may be made to the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present application and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A horizontal soil pressure monitoring device is characterized by comprising a fixed plate, a soil pressure box and a signal transmission pipe, wherein the soil pressure box and the signal transmission pipe are arranged on the fixed plate; the signal transmission pipes are arranged on two sides of the fixed plate, the fixed plate is of a U-shaped structure, and transverse clapboards are correspondingly arranged right below the soil pressure box to support the soil pressure box.

2. The apparatus as claimed in claim 1, wherein the length of the diaphragm plate in the direction perpendicular to the fixing plate is not less than the length of the pressure cell in the direction perpendicular to the fixing plate.

3. The fixing device for horizontally laying soil pressure boxes according to claim 1, wherein a rubber film layer is provided on the surface of the soil pressure box.

4. The fixing device for horizontally laying the soil pressure cell as claimed in claim 3, wherein the thickness of the rubber film layer is 1-2 mm.

5. The horizontal soil pressure monitoring device of claim 1, wherein the signal transmission pipe is a PVC pipe, and the diameter of the signal transmission pipe is not smaller than the wire diameter of the soil pressure cell, so that the wire of the soil pressure cell is inserted into the PVC pipe.