A real-time monitoring device for tunnel secondary lining strip mode injection grouting fullness

Abstract

The utility model belongs to tunnel construction technical field discloses a kind of real-time monitoring device of tunnel secondary lining strip formwork grouting fullness, comprising: pressure sensing module, by not less than 12 groups high-performance pressure strain sensing meter composition, it is arranged in the key stress point between tunnel secondary lining vault lining and formwork in matrix, cover vault full section area;Signal acquisition module is connected with pressure sensing module, real-time reading and preprocessing original pressure data;Wireless transmission module is connected with signal acquisition module, using low-power wide-area network LPWAN or industrial-grade WiFi protocol, the data after preprocessing is synchronized to remote monitoring terminal, support 500m range stable transmission;Early warning module, monitoring terminal preset pressure early warning threshold, such as the standard pressure value of grouting fullness ±10%, support artificial dynamic adjustment;When monitoring pressure value is continuously lower than early warning threshold, the following actions are automatically triggered: local sound-light alarm device starts;Early warning message is sent to construction management personnel mobile terminal.

Description

Technical Field

[0001] This utility model belongs to, but is not limited to, the field of tunnel construction technology, and particularly relates to a real-time monitoring device for the fullness of grouting in the secondary lining of a tunnel. Background Technology

[0002] 1. Grouting with formwork in the secondary lining of tunnels is a key process for solving the void defect in the arch crown. By promptly grouting after concrete pouring to fill the voids in the arch crown, the overall integrity of the lining structure is improved. However, traditional methods have the following technical bottlenecks:

[0003] The judgment of fullness relies on human experience: when the grouting is finished, the machine usually judges the grouting by sudden change in grouting pressure or estimation of grouting volume. Without the support of quantitative data, it is easy to cause insufficient grouting or over-grouting. Manual inspection cannot cover the entire area of ​​the arch in real time, and hidden void defects are difficult to find. Later, radar detection is required for rework, which is costly and affects the construction period.

[0004] 2. Outdated monitoring methods: Traditional monitoring only sets up a single-point pressure gauge at the end of the grouting pipe, which cannot reflect the actual filling state of the complex curved surface of the arch, and the data is significantly biased; there is no dynamic feedback mechanism during the grouting process, and it is impossible to adjust the grouting parameters (such as grouting speed and termination pressure) according to real-time data.

[0005] 3. Lack of a quality traceability system: Grouting construction data (pressure, time, volume) rely on manual recording, which is prone to omissions and errors, and lacks visualization analysis tools, making it difficult to trace the causes of quality problems; grouting process standards are not uniform across different tunnel projects, and there is a lack of replicable intelligent monitoring solutions. Utility Model Content

[0006] To address the problems existing in the prior art, this utility model provides a real-time monitoring device for the fullness of grouting in the secondary lining of a tunnel.

[0007] This utility model is implemented as follows: a real-time monitoring device for the grout fullness of tunnel secondary lining with formwork, the device comprising:

[0008] The pressure sensing module consists of no less than 12 sets of high-performance pressure strain sensors, which are arranged in a matrix at key stress points between the tunnel secondary lining arch and the template, covering the entire cross-sectional area of ​​the arch.

[0009] The signal acquisition module is connected to the pressure sensing module to read and preprocess the raw pressure data in real time.

[0010] The wireless transmission module connects to the signal acquisition module and uses low-power wide area network (LPWAN) or industrial-grade WiFi protocol to synchronize pre-processed data to the remote monitoring terminal, supporting stable transmission within a range of 500 meters.

[0011] The early warning module presets a pressure warning threshold on the monitoring terminal, such as ±10% of the standard pressure value when grouting is full, and supports manual dynamic adjustment. When the monitored pressure value continues to be lower than the warning threshold, the following actions are automatically triggered: the local audible and visual alarm device is activated; and a warning SMS is sent to the mobile terminal of the construction management personnel.

[0012] Furthermore, the sensor has high sensitivity, accuracy ≤0.1kPa, and wide range (0-500kPa), enabling it to collect dynamic pressure change data in real time during concrete pouring and grouting with formwork.

[0013] Furthermore, the pressure strain sensor adopts an embedded installation method, which is fixed between the secondary lining steel reinforcement frame and the formwork before pouring. Its sensing surface is flush with the inner side of the formwork to ensure that the pressure data directly reflects the filling state of the arch.

[0014] Furthermore, the warning text message includes the specific location, abnormal pressure value, and time of occurrence.

[0015] Furthermore, this device is applicable to the secondary lining concrete pouring construction of railway and highway tunnel projects, especially for the prevention and control of quality defects such as arch voids and insufficient secondary lining thickness.

[0016] Based on the above technical solutions and the technical problems solved, the advantages and positive effects of the technical solution to be protected by this utility model are as follows:

[0017] This invention improves the quality of tunnel lining construction by enabling full-process control of construction quality through intelligent monitoring and data analysis, effectively preventing and reducing the occurrence of quality defects; it also improves construction efficiency by reducing manual intervention and shortening the construction period through intelligent construction technology and monitoring systems; it reduces construction costs by providing early warning and intervention for quality defects; and it promotes technological progress in the industry by developing and applying intelligent monitoring systems for tunnel lining, which will drive the advancement and upgrading of tunnel engineering construction technology. Attached Figure Description

[0018] Figure 1 This is a structural diagram of the real-time monitoring device for the fullness of grouting in the secondary lining of a tunnel provided in this embodiment of the utility model;

[0019] In the diagram: 1. Pressure sensing module; 2. Signal acquisition module; 3. Wireless transmission module; 4. Early warning module. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this utility model.

[0021] like Figure 1 As shown, this utility model embodiment provides a real-time monitoring device for the grouting fullness of the secondary lining of a tunnel, the device comprising:

[0022] Pressure sensing module 1 consists of no less than 12 sets of high-performance pressure strain sensors, which are arranged in a matrix at key stress points between the tunnel secondary lining arch lining and the template, covering the entire cross-sectional area of ​​the arch.

[0023] Signal acquisition module 2 is connected to pressure sensing module 1 to read and preprocess raw pressure data in real time;

[0024] The wireless transmission module 3 is connected to the signal acquisition module 2. It adopts the low-power wide area network (LPWAN) or industrial-grade WiFi protocol to synchronize the pre-processed data to the remote monitoring terminal and supports stable transmission within a range of 500 meters.

[0025] The early warning module 4 presets a pressure early warning threshold on the monitoring terminal, such as ±10% of the standard pressure value when grouting is full, and supports manual dynamic adjustment; when the monitored pressure value continues to be lower than the early warning threshold, the following actions are automatically triggered: the local audible and visual alarm device is activated; and an early warning SMS is sent to the mobile terminal of the construction management personnel.

[0026] The sensor has high sensitivity, accuracy ≤0.1kPa, and wide range (0-500kPa), and can collect dynamic pressure change data in real time during concrete pouring and grouting with formwork.

[0027] The pressure strain sensor is installed in an embedded manner, fixed between the secondary lining steel reinforcement frame and the formwork before pouring. Its sensing surface is flush with the inner side of the formwork to ensure that the pressure data directly reflects the filling state of the arch.

[0028] The warning text message includes the specific location, abnormal pressure value, and time of occurrence.

[0029] This device is suitable for the secondary lining concrete pouring construction of railway and highway tunnel projects, especially for the prevention and control of quality defects such as voids in the arch and insufficient thickness of the secondary lining.

[0030] 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.

[0031] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any modifications, equivalent substitutions and improvements made by those skilled in the art within the technical scope disclosed in this utility model, and within the spirit and principles of this utility model, should be included within the protection scope of this utility model.

Claims

1. A real-time monitoring device for the grouting fullness of tunnel secondary lining with formwork, characterized in that, The device includes: The pressure sensing module consists of no less than 12 sets of high-performance pressure strain sensors, which are arranged in a matrix at key stress points between the tunnel secondary lining arch and the template, covering the entire cross-sectional area of ​​the arch. The signal acquisition module is connected to the pressure sensing module to read and preprocess the raw pressure data in real time. The wireless transmission module connects to the signal acquisition module and uses low-power wide area network (LPWAN) or industrial-grade WiFi protocol to synchronize pre-processed data to the remote monitoring terminal, supporting stable transmission within a range of 500 meters. The early warning module presets a pressure warning threshold on the monitoring terminal, such as ±10% of the standard pressure value when grouting is full, and supports manual dynamic adjustment. When the monitored pressure value continues to be lower than the warning threshold, the following actions are automatically triggered: the local audible and visual alarm device is activated; and a warning SMS is sent to the mobile terminal of the construction management personnel.

2. The real-time monitoring device for the fullness of grouting in the secondary lining of a tunnel according to claim 1, characterized in that, The sensor has high sensitivity, accuracy ≤0.1kPa, and wide range (0-500kPa), and can collect dynamic pressure change data in real time during concrete pouring and grouting with formwork.

3. The real-time monitoring device for the fullness of grouting in the secondary lining of a tunnel according to claim 1, characterized in that, The pressure strain sensor is installed in an embedded manner, fixed between the secondary lining steel reinforcement frame and the formwork before pouring. Its sensing surface is flush with the inner side of the formwork to ensure that the pressure data directly reflects the filling state of the arch.

4. The real-time monitoring device for the fullness of grouting in the secondary lining of a tunnel according to claim 1, characterized in that, The warning text message includes the specific location, abnormal pressure value, and time of occurrence.

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