Monitoring structure suitable for foam lightweight concrete roadbed

Abstract

The utility model discloses a monitoring structure suitable for foam lightweight concrete subgrade, including subgrade, transmission line, information collector and total station, the subgrade along subgrade depth direction is buried with earth pressure cell layer by layer, the bottom of subgrade is connected with the base plate, one side of subgrade is provided with retaining wall, earth pressure cell is divided into eight groups, information collector is provided with the total station, the base plate is connected with the earth pressure cell. And the eight groups of soil pressure boxes are divided into two rows and are symmetrically distributed by taking the retaining wall as a center. According to the invention, roadbed settlement and other diseases after long-term service can be monitored, the soil pressure box is mounted in the roadbed, and the total station, the cable and the information collector are utilized to monitor soil conditions and remotely transmit data; the obtained data are converted into stress strain, correlation analysis is carried out, and an evaluation basis is provided for the cause and improvement method of roadbed diseases.

Description

Technical Field

[0001] This utility model relates to the field of geotechnical engineering technology in transportation engineering and civil engineering, specifically a monitoring structure suitable for foamed lightweight concrete roadbeds. Background Technology

[0002] Foamed concrete, as a new type of fill material, has many characteristics such as low density, good uprightness, and good fluidity. The roadbed cast with it is an integral structure. After the foundation settlement is transferred upward to the pavement structure through this roadbed structure, the difference in lateral settlement will inevitably be reduced. In addition, the foundation load under the action of lightweight soil roadbed is significantly reduced. Therefore, lightweight soil roadbed can reduce total settlement, post-construction settlement, and differential settlement, and improve the stability of roadbed and structures. It can effectively solve the problems of excessive settlement and insufficient stability of deep soft soil high fill roadbed. Considering the characteristics of poor soft soil properties, large soft soil foundation thickness, and high roadbed fill, in order to improve the stability of high fill roadbed on deep soft soil foundation, reduce foundation settlement, ensure the successful implementation of soft soil foundation roadbed engineering in this project, improve driving comfort during road operation, effectively control post-construction settlement, and ensure the durability of roadbed and pavement structure, the high fill roadbed section is filled with cast-in-place foamed lightweight soil. Utility Model Content

[0003] The purpose of this invention is to provide a monitoring structure suitable for foamed lightweight concrete subgrade, so as to solve the problem mentioned in the background art that the existing technology cannot systematically monitor and evaluate the causes of subgrade settlement and other defects after long-term service of lightweight soil subgrade.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a monitoring structure suitable for foamed lightweight concrete roadbed, comprising a roadbed, a transmission line, an information collector, and a total station. The roadbed has earth pressure cells embedded in layers along the depth direction of the roadbed. The bottom of the roadbed is connected to a base plate. A retaining wall is provided on one side of the roadbed. There are eight groups of earth pressure cells, which are arranged in two rows and symmetrically distributed with the retaining wall as the center.

[0005] Preferably, the earth pressure box is electrically connected to a data acquisition device installed within the roadbed land area via wiring.

[0006] Preferably, the earth pressure cells mentioned above are longitudinally arranged 50cm down from the top of the roadbed, and the distance between two adjacent sets of earth pressure cells in the vertical plane is 90cm.

[0007] Preferably, the earth pressure cell is a strain gauge miniature earth pressure sensor.

[0008] Preferably, the earth pressure cell is connected by a full-bridge connection.

[0009] Compared with the prior art, the beneficial effects of this utility model are: the monitoring structure applicable to foamed lightweight concrete subgrade can monitor subgrade settlement and other defects after long-term service. By installing earth pressure cells inside the subgrade, the soil condition is monitored using a total station, cable, and data acquisition device, and the data is transmitted remotely. The obtained data is converted into stress and strain, and correlation analysis is performed to provide an evaluation basis for the causes of subgrade defects and improvement methods. Attached Figure Description

[0010] Figure 1 This is the front view of the present invention;

[0011] Figure 2 This is a side view of the present invention;

[0012] Figure 3 This is a schematic diagram of the retaining wall structure of this utility model.

[0013] In the diagram: 1. Roadbed; 2. Earth pressure cell; 3. Base plate; 4. Transmission line; 5. Data collector; 6. Total station; 7. Retaining wall. Detailed Implementation

[0014] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0015] Please see Figure 1-3 The present invention provides an embodiment of a monitoring structure suitable for foamed lightweight concrete roadbed, comprising a roadbed 1, a transmission line 4, an information collector 5, and a total station 6. The roadbed 1 is provided with earth pressure cells 2 buried in layers along the depth direction of the roadbed. The bottom of the roadbed 1 is connected to a base plate 3. A retaining wall 7 is provided on one side of the roadbed 1. There are eight sets of earth pressure cells 2, which are arranged in two rows and symmetrically distributed with the retaining wall 7 as the center.

[0016] Furthermore, the earth pressure box 2 is electrically connected to the data acquisition device 5 installed within the land area of ​​the roadbed 1 via wiring.

[0017] Furthermore, the upper earth pressure box 2 is set longitudinally 50cm down from the top of the roadbed 1, and the distance between two adjacent sets of earth pressure boxes 2 in the vertical plane is 90cm.

[0018] Furthermore, the earth pressure cell 2 is connected by a full-bridge connection, and the measurement data acquisition is controlled by a computer. Before the test, the performance of the strain gauge needs to be tested to ensure that it meets the accuracy requirements.

[0019] According to the requirements of displacement measurement accuracy in this test, a dial indicator was selected to control the displacement of the retaining wall with an accuracy of 0.01mm and a maximum range of 10mm. The dial indicator is fixed with a magnetic base, and the extension rod of the dial indicator is pressed against the wall near the displacement rod. As the displacement rod is rotated, the retaining wall is displaced, and the dial indicator can simultaneously measure the magnitude of the displacement of the retaining wall.

[0020] Working principle: This monitoring structure is applicable to foamed lightweight concrete subgrade. It monitors subgrade settlement and other defects after long-term service. Earth pressure cells 2 are installed inside the subgrade. The soil condition is monitored using a total station 6, cable and data acquisition device 5 and the data is transmitted remotely. The obtained data is converted into stress and strain and correlation analysis is performed to provide an evaluation basis for the causes of subgrade defects and improvement methods. The earth pressure cells 2 are divided into eight groups, arranged in two rows of four corresponding to each other inside the retaining wall.

[0021] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0022] 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.

[0023] 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 or a detachable connection; a mechanical connection or an electrical connection; 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.

Claims

1. A monitoring structure suitable for foamed lightweight concrete subgrade, comprising a subgrade (1), a transmission line (4), an information collector (5), and a total station (6), characterized in that: The roadbed (1) is provided with earth pressure cells (2) in layers along the depth direction of the roadbed. The bottom of the roadbed (1) is connected to a base plate (3). A retaining wall (7) is provided on one side of the roadbed (1). There are eight sets of earth pressure cells (2). The eight sets of earth pressure cells (2) are divided into two rows and are symmetrically distributed with the retaining wall (7) as the center.

2. The monitoring structure for foamed lightweight concrete subgrade according to claim 1, characterized in that: The earth pressure box (2) is electrically connected to the data information acquisition device (5) installed within the land area of ​​the roadbed (1) via wiring.

3. The monitoring structure for foamed lightweight concrete subgrade according to claim 1, characterized in that: The earth pressure cells (2) mentioned above are set longitudinally 50cm down from the top of the roadbed (1), and the distance between two adjacent earth pressure cells (2) in the vertical plane is 90cm.

4. A monitoring structure suitable for foamed lightweight concrete subgrade according to claim 1, characterized in that: The earth pressure cell (2) is a strain gauge miniature earth pressure sensor.

5. A monitoring structure suitable for foamed lightweight concrete subgrade according to claim 1, characterized in that: The earth pressure cell (2) is connected by a full bridge connection.

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