Foundation pit supporting stress line box device

Abstract

The utility model relates to the technical field of foundation pit engineering, in particular to a foundation pit support stress line box device, which is characterized in that a detachable lining structure is arranged in a line box body, a cable clamping groove used for routing of component cables is arranged on the back of the lining structure, an R-shaped iron sheet is arranged on one side of the cable clamping groove, and the lining structure is arranged on the other side of the R-shaped iron sheet. The end part of the R-shaped iron sheet is provided with a frequency instrument connector, and the other side in the wire box body is provided with a simple folding support used for installing a frequency instrument. The wire box has the advantages that the wire box is very simple and convenient to install and use, installation and daily data acquisition and recording of the wire box can be completed by a single person, abrasion or damage of cable ends and labels of components can be effectively prevented, data acquisition efficiency can be effectively improved, the data error rate can be effectively reduced, and the wire box can be continuously and repeatedly used and is good in economic benefit.

Description

Technical Field

[0001] This utility model relates to the field of foundation pit engineering technology, specifically to a foundation pit support stress box device. Background Technology

[0002] As a testable item in the deformation monitoring of foundation pit engineering, the stress of the support structure can effectively reflect the stress condition of the foundation pit support structure and is one of the important indicators for assessing the safety status of the foundation pit.

[0003] For deep foundation pits with multi-layered support structures, in order to ensure effective monitoring of the stress condition of the foundation pit support structure, stress monitoring points are usually set up for each layer of support structure within the same monitoring section. Different types of support structures require different stress instruments. For example, each concrete support structure in the monitoring section requires the installation of 4 rebar stress gauges, and each steel support requires the installation of 1 reaction force gauge. For anchor structures in slopes, when multiple rebars are combined, rebar stress gauges need to be installed on each rebar. Since each stress instrument has a separate cable for frequency and temperature value acquisition, in order to effectively distinguish the stress instrument corresponding to each stress line during data acquisition, the instrument number is usually marked on the stress line measurement end.

[0004] Currently, the common method for acquiring stress in foundation pit support structures involves using a frequency meter to sequentially measure and record the frequency and temperature of the components within the support structure. However, each data measurement requires switching the connection between the frequency meter and the cables of different components. Furthermore, before data recording, it's necessary to search for and distinguish the component numbers and their corresponding stress measurement point numbers. This is especially problematic when multiple measurement points are needed for each stress section. A significant amount of time and effort is spent frequently switching the frequency meter and component cables amidst a jumble of cables and searching for different component numbers and their corresponding measurement point numbers. This not only severely impacts data acquisition efficiency but also greatly increases the error rate. Summary of the Invention

[0005] The purpose of this utility model is to address the shortcomings of the existing technology by providing a foundation pit support stress junction box device. This device not only provides basic protection and storage for cables, but also improves the utilization rate of the junction box space through reasonable cable routing, avoids cables from getting tangled or knotted, and sets up a dedicated measurement point and component number management mechanism to simplify the identification and matching between different measurement points and component numbers. With the help of a simple connection device, the connection between the frequency meter and different components can be switched with a single click.

[0006] The objective of this utility model is achieved through the following technical solution:

[0007] A foundation pit support stress junction box device includes a junction box body with an openable and closable door. The device is characterized by: a detachable inner lining structure inside the junction box body; a cable tray for routing component cables on the back of the inner lining structure; an R-shaped iron plate on one side of the cable tray; a frequency meter connector at the end of the R-shaped iron plate; and a simple folding bracket for mounting a frequency meter on the other side of the junction box body.

[0008] The back of the inner lining structure is provided with a plurality of cable slots, which are evenly spaced.

[0009] The component cable is connected to the switch pin on the R-shaped iron plate via a wire end fixing nut.

[0010] Several component cables are each equipped with a component connection switching switch, which controls the connection state between the component cable and the R-shaped iron plate; the switching between the several component cables is achieved through the component connection switching switch.

[0011] The front of the inner lining structure is provided with a table of numbered axial stress measuring points.

[0012] The junction box body has bolt holes for fixing.

[0013] The junction box body is equipped with a door latch for locking the box door.

[0014] The advantages of this utility model are:

[0015] 1) Installation and use are very simple, and a single person can complete the installation of the junction box and daily data collection and recording.

[0016] 2) It can effectively protect the cable ends and labels of components from wear or damage.

[0017] 3) It can effectively improve data collection efficiency and reduce data error rate.

[0018] 4) It can be reused repeatedly, resulting in good economic benefits. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model (closed box state);

[0020] Figure 2 for Figure 1 Side view;

[0021] Figure 3 This is a schematic diagram of the structure of this utility model (open box state);

[0022] Figure 4This is a schematic diagram of the inner lining structure of this utility model;

[0023] Figure 5 This is a schematic diagram of the wiring structure in this utility model;

[0024] Figure 6 for Figure 4 Side view;

[0025] Figure 7 This is a detailed schematic diagram of the wiring structure in this utility model;

[0026] Figure 8 This is a detailed schematic diagram of the box door structure of this utility model;

[0027] Figure 9 This is a detailed schematic diagram of the simple folding bracket in this utility model;

[0028] Figure 10 for Figure 9 Side view;

[0029] Figure 11 This is a schematic diagram of the usage state of this utility model. Detailed Implementation

[0030] The features and other related features of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments, so as to facilitate the understanding of those skilled in the art:

[0031] like Figure 1-11 As shown in the figure, numbers 1-23 represent: bolt hole 1, door handle 2, door lock 3, door latch 4, simple folding bracket 5, spring-loaded buckle 6, inner lining structure 7, axial force (stress) measuring point numbering table 8, component connection switch 9, frequency meter connector 10, cable slot 11, component cable 12, wire end fixing nut 13, R-type iron piece 14, spring 15, switch pin 16, spring 17, spring 18, door latch 19, spring 20, spring 21, spring 22, and spring 23.

[0032] Example: Figures 1 to 11 As shown, the foundation pit support stress junction box device in this embodiment includes a junction box body, on which an openable and closable door is provided. A matching door lock 3 and door latch 4 are provided at the location of the door; combined with... Figure 8 As shown, the door latch 4 uses a door bolt 19, and a spring 20 is provided at the door lock 3. When the door bolt 19 is inserted into the lock hole of the door lock 3, the spring 20 is pushed up and locked, thus allowing the door to be securely closed to protect the internal structure of the junction box. A door handle 2 is provided at the door position. A spring-loaded buckle 6 is provided at the door to ensure the door is secure when closed.

[0033] A simple folding bracket 5 is provided on one side of the box body. This simple folding bracket 5 is used to install the frequency meter used for stress data acquisition. Figure 9 and Figure 10 As shown, the simple folding bracket 5 is equipped with three springs: spring 21, spring 22, and spring 23. When the frequency meter is installed, the bracket rotates open, and spring 21 is stretched. After the frequency meter is installed, spring 21 uses its rebound force to limit the frequency meter, ensuring that the frequency meter is securely installed. Spring 22 is installed at the bottom of the bracket, while spring 23 is installed at the limiting structure at the bottom of the bracket. When the bracket rotates open, the limiting structure can be pried open by the action of spring 23, thereby allowing the bracket to rotate open. At this time, spring 22 also rotates. When the bracket returns to its original position, the bracket and the limiting structure are locked together by the cooperation of spring 22 and spring 23.

[0034] like Figure 3 and Figure 4 As shown, a detachable inner lining structure 7 is provided inside the wire box body, located on the other side of the simple folding bracket 5. An axial force (stress) measuring point numbering table 8 is provided on the front of the inner lining structure 7, and its information generally includes serial number, measuring point number, component number, and remarks. In this embodiment, the axial force (stress) measuring point numbering table 8 includes 10 groups of components.

[0035] Ten cable slots 11, matching the number of axial force (stress) measuring points in Table 8, are provided on the back of the inner lining structure 7. Each cable slot 11 is used for the routing of component cables 12. That is, the component cables 12 of each component are independently set in a cable slot 11, so that the routing of each component cable 12 is reasonable, the utilization rate of the junction box space is improved, and the cables are prevented from tangling and knotting.

[0036] An R-shaped metal plate 14 is provided on the side of each cable slot 11, and a spring 15 is provided at the end of the R-shaped metal plate 14. The end of the component cable 12 is connected to the switch pin 16 on the R-shaped metal plate 14 through a wire end fixing nut 13. Figure 3 and Figure 6 As shown, a frequency meter connector 10 is provided at the end of the R-shaped iron sheet 14. The frequency meter connector 10 can be directly connected to the frequency meter, thereby realizing the connection between the frequency meter and the components.

[0037] In this embodiment, the connection between each component cable 12 and the R-shaped iron plate 14 is established via a component connection switch 9. When data from a specific component needs to be collected, the corresponding component switch 9 is turned on to connect the component cable 12 of that component to the frequency meter. At this time, the point and component number management mechanism set in the axial force (stress) measurement point numbering table 8 simplifies the identification and matching of different measurement points and component numbers. Furthermore, the component switch 9 enables "one-click switching" of the connection between the frequency meter and different components.

[0038] like Figure 7 As shown, in this embodiment, a spring 18 is provided at the R-shaped iron plate 14 to ensure that the position of the R-shaped iron plate 14 is adjustable; a spring 17 is provided at the switch pin 16, and the switch pin 16 can be inserted into the slot of the R-shaped iron plate 14 under the extension and contraction of the spring 17. When the switch pin 16 is inserted, the R-shaped iron plate 14 undergoes a slight displacement under the action of the spring 18, and then the R-shaped iron plate 14 is reset under the action of the spring 18 and locks the switch pin 16.

[0039] like Figure 1 or Figure 3 As shown, bolt holes 1 are provided on the main body of the junction box for fixing the main body of the junction box in the designed position.

[0040] When using this embodiment, the following steps are included:

[0041] (1) Junction box installation:

[0042] 1) Depending on the actual situation, use a nail gun or wire to fix the junction box body to the retaining wall of the foundation pit or the edge guardrail at a suitable height through the bolt holes 1 reserved on the upper and lower edges of the junction box body.

[0043] 2) Straighten the component cables 12 of the foundation pit support structure stress measuring points located on the same monitoring section and sort them according to the measuring point number. Insert them one by one into the cable slots 11 on the back of the inner lining structure 7 for fixation. Then, securely connect the component cables 12 to the wire end fixing nuts 13 in sequence, and use a frequency meter to test whether the connection is good.

[0044] 3) After all components and cables 12 are connected and tested, mark the test point numbers and corresponding component numbers on the front numbering area of ​​the inner lining structure 7 according to the installation sequence using a pen or small sticker.

[0045] 4) Insert the installed liner into the junction box shell to complete the installation.

[0046] (2) Data collection:

[0047] 1) After opening the cabinet door, put down the simple folding bracket 5 behind the cabinet door, fix the frequency meter on the bracket, and turn on the power.

[0048] 2) Connect the frequency meter to the frequency meter connector 10 on the inner lining structure 7 of the junction box using a BNC cable.

[0049] 3) Press the switch corresponding to the part number of the component to be measured.

[0050] 4) Read and record the data displayed on the frequency meter screen.

[0051] 5) Press the other component switch to collect and measure the stress data of the next component.

[0052] Although the above embodiments have described the concept and embodiments of the present invention in detail with reference to the accompanying drawings, those skilled in the art will recognize that various improvements and modifications can still be made to the present invention without departing from the scope of the claims, and therefore will not be elaborated here.

Claims

1. A foundation pit support stress line box device, comprising a line box body, the line box body has an openable and closable box door, characterized in that: A detachable inner lining structure is arranged in the wire box body, the back of the inner lining structure is provided with a cable clamping groove for component cable wiring, one side of the cable clamping groove is provided with an R-shaped iron sheet, the end of the R-shaped iron sheet is provided with a frequency instrument connector, the other side in the wire box body is provided with a simple folding support for mounting a frequency instrument.

2. The stress line box device for a foundation pit support according to claim 1, characterized in that: The back of the inner lining structure is provided with a plurality of cable clamping grooves, which are uniformly arranged.

3. The stress line box device for a foundation pit support according to claim 1, characterized in that: The component cable is connected with the switch pin on the R-shaped iron sheet through a wire head fixing nut.

4. A stress cone device for use in a foundation pit support according to claim 3, wherein: A plurality of component cables are respectively provided with component connection switching switches, the component connection switching switches control the communication state between the component cables and the R-shaped iron sheet; the switching between a plurality of component cables is realized through the component connection switching switches.

5. The stress line box device for a foundation pit support according to claim 1, characterized in that: The front of the inner lining structure is provided with an axial force stress measuring point numbering table.

6. The stress line box device for a foundation pit support according to claim 1, characterized in that: A bolt hole for fixing is formed on the wire box body.

7. The pit support stress line box device according to claim 1, characterized by: A box door lock catch for locking the box door is arranged on the wire box body.

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