Assembly type subway station dynamic response monitoring system

Abstract

The utility model relates to a dynamic response monitoring system for an assembled subway station, which comprises a steel bar meter, a concrete strain gauge and a monitoring control system, and the steel bar meter and the concrete strain gauge are arranged at a plurality of monitoring signal points according to the structure of the assembled subway station. The monitoring control system is used for carrying out data acquisition, analysis, monitoring and early warning on the data acquisition and analysis devices; the monitoring signal points comprise two groups of assembly type subway station top plate monitoring signal points, two groups of assembly type subway station side wall monitoring signal points and two groups of assembly type subway station middle plate monitoring signal points, the two groups of assembly type subway station top plate monitoring signal points, the two groups of assembly type subway station side wall monitoring signal points and the two groups of assembly type subway station middle plate monitoring signal points are respectively positioned at two opposite side ends of the assembly type subway station; and the other group is a concrete strain gauge monitoring group on the opposite side. Monitoring signal points are arranged according to the structural characteristics of the assembly type subway station, monitoring is comprehensive, the monitoring condition can be rapidly obtained, and safety early warning and fault area positioning are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of urban rail transit engineering, and in particular to a dynamic response monitoring system for an assembled subway station. Background Art

[0002] Prefabricated subway stations are made by processing various components that make up the station structure in the factory, then transporting the components to the site and assembling them using lifting equipment. Compared with traditional cast-in-place concrete mixing stations, prefabricated mixing stations can achieve mechanized mass production in factories; they can improve the dimensional accuracy of components, thereby increasing the stability of the structure; they can reduce dust pollution generated during the manufacturing process, making it more environmentally friendly; they can speed up the construction progress and reduce the impact on ground transportation and surrounding residents. Therefore, prefabricated stations have gradually become the main form of subway construction in my country.

[0003] Compared with traditional cast-in-place stations, since the components of prefabricated stations are connected by different forms of joints, their integrity is obviously weaker than that of cast-in-place structures, which causes the prefabricated station structure to easily crack when subjected to stress and leak at the joints and other defects. Utility Model Content

[0004] The purpose of the utility model is to provide a dynamic response monitoring system for an assembled subway station, which forms a dynamic response system for safety monitoring of the assembled subway station according to the structural stress and stress-strain characteristics of the assembled subway station.

[0005] In order to achieve the above purpose, the technical solution provided by the utility model is:

[0006] A dynamic response monitoring system for an assembled subway station, comprising a steel bar meter, a concrete strain gauge and a monitoring control system, wherein the steel bar meter and the concrete strain gauge are installed at a plurality of monitoring signal points according to the structure of the assembled subway station, and are respectively connected to a monitoring control system for data collection and analysis and monitoring and early warning through signal lines; the monitoring signal points include monitoring signal points for the top plate of the assembled subway station, monitoring signal points for the side walls of the assembled subway station and monitoring signal points for the middle plate of the assembled subway station;

[0007] The monitoring signal points of the roof of the assembled subway station, the monitoring signal points of the side walls of the assembled subway station and the monitoring signal points of the middle plate of the assembled subway station are respectively provided with two groups, which are respectively located at the opposite sides of the assembled subway station. Each group is provided with the front, middle and rear three monitoring signal positions, and the positions of the front, middle and rear three monitoring signal points of the two groups are staggered front and back in sequence, forming a total of six monitoring sections;

[0008] The first group is the rebar meter monitoring group at one end of the prefabricated subway station, including the front rebar meter monitoring section, the middle rebar meter monitoring section and the rear rebar meter monitoring section; the second group is the concrete strain gauge monitoring group at the other side of the prefabricated subway station opposite to the first group, including the front concrete strain gauge monitoring section, the middle concrete strain gauge monitoring section and the rear concrete strain gauge monitoring section.

[0009] To optimize the above technical solutions, the specific measures taken also include:

[0010] In the three monitoring sections of the rebar meter monitoring group, namely the front rebar meter monitoring section, the middle rebar meter monitoring section and the rear rebar meter monitoring section, each monitoring section has rebar meters arranged horizontally at the top plate, side wall and middle plate respectively.

[0011] In the front concrete strain gauge monitoring section, the middle concrete strain gauge monitoring section and the rear concrete strain gauge monitoring section of the concrete strain gauge monitoring group, concrete strain gauges are arranged horizontally on the top plate, the side wall and the middle plate of each monitoring section.

[0012] Furthermore, the monitoring signal points also include ring-buckle monitoring signal points, and a steel bar gauge or a concrete strain gauge is installed on both sides of the ring-buckle connection of the ring-buckle monitoring signal points.

[0013] Furthermore, the monitoring signal points also include top longitudinal beam monitoring signal points, and steel bar gauges or concrete strain gauges are arranged on the top, middle, bottom and sides of the top longitudinal beam of the top longitudinal beam monitoring signal points.

[0014] Furthermore, the monitoring signal points also include monitoring signal points at joints, and a steel bar gauge or a concrete strain gauge is installed on both sides of the joints of the monitoring signal points at the joints.

[0015] As a preferred solution, the monitoring and control system is provided with an automated collection module for collecting and analyzing data every 4-6 hours, and a prompt module for issuing an early warning for data exceeding a threshold value.

[0016] Collection boxes are installed on both sides of the middle of the prefabricated subway station, and are equipped with doors that are easy to open. The lines connecting each monitoring signal point are laid on both sides and concentrated in the collection boxes.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] The utility model arranges monitoring signal points according to the structural characteristics of the assembled subway station, and respectively sets monitoring signal points on the top plate, side wall and middle plate of the assembled subway station to form a main position for arranging the monitoring signal, and sets two groups of monitoring signal points at two opposite side ends of the main position for monitoring by different devices, and the monitoring signal points are staggered front and back in sequence to form a plurality of monitoring sections.

[0019] The utility model utilizes the different monitoring properties of the steel bar meter and the concrete strain gauge to perform signal monitoring on the opposite sides of the main monitoring signal point respectively, ensures accurate and safe monitoring of the main monitoring position by comparing the two groups of signals, and obtains the overall dynamic monitoring of the prefabricated subway station in combination with other measurement sites arranged according to the structural characteristics of the prefabricated subway station.

[0020] The solution of the utility model can save the total number of monitoring devices, combine the primary and secondary monitoring targets, and monitor comprehensively. It can not only quickly obtain the overall monitoring situation, but also grasp the dynamic monitoring results of each part, which is convenient for safety warning and locating fault areas.

[0021] The utility model can be used to analyze the changing law of strain under the action of construction load, and can be used to grasp the deformation characteristics of the assembled subway station structure during its construction and operation, to ensure the construction quality and safety, and to provide a reference for deformation monitoring of assembled subway stations. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 : Schematic diagram of six monitoring section structures of the assembled subway station dynamic response monitoring system of the utility model.

[0023] Figure 2 : Schematic diagram of top plate or middle plate monitoring signal points.

[0024] Figure 3 : Schematic diagram of ring monitoring signal points.

[0025] Figure 4 : Schematic diagram of top longitudinal beam monitoring signal points.

[0026] Figure 5 : Schematic diagram of monitoring signal points at the joint.

[0027] In the figure: 1 is a steel bar gauge or a concrete strain gauge, 1-1 is the first monitoring section, 2-2 is the second monitoring section, 3-3 is the third monitoring section, 4-4 is the fourth monitoring section, 5-5 is the fifth monitoring section, and 6-6 is the sixth monitoring section. DETAILED DESCRIPTION

[0028] The above contents of the utility model are further described in detail below in the form of embodiments, but this should not be understood as the scope of the above subject matter of the utility model is limited to the following embodiments. All technologies realized based on the above contents of the utility model belong to the scope of the utility model.

[0029] In the description of the present invention, it is also necessary to explain that the orientation or position relationship is based on the relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention; terms such as "first, second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] The utility model provides a dynamic response monitoring system for an assembled subway station, comprising a steel bar meter, a concrete strain gauge and a monitoring control system. The steel bar meter and the concrete strain gauge are installed at a plurality of monitoring signal points according to the structure of the assembled subway station, and are respectively connected to a monitoring control system for data collection and analysis and monitoring and early warning through signal lines; the monitoring signal points comprise monitoring signal points for the top plate of the assembled subway station, monitoring signal points for the side walls of the assembled subway station and monitoring signal points for the middle plate of the assembled subway station.

[0031] There are two groups of monitoring signal points for the roof of the prefabricated subway station, the side wall of the prefabricated subway station and the middle plate of the prefabricated subway station, which are located at the opposite sides of the prefabricated subway station. Each group is provided with three monitoring signal positions, namely the front, middle and rear. The positions of the front, middle and rear monitoring signal points of the two groups are staggered in sequence, forming a total of six monitoring sections, such as Figure 1 As shown, it includes a first monitoring section 1-1, a second monitoring section 2-2, a third monitoring section 3-3, a fourth monitoring section 4-4, a fifth monitoring section 5-5, and a sixth monitoring section 6-6.

[0032] The first group is the rebar meter monitoring group at one end of the prefabricated subway station, including the front rebar meter monitoring section, the middle rebar meter monitoring section and the rear rebar meter monitoring section; the second group is the concrete strain gauge monitoring group at the other side of the prefabricated subway station opposite to the first group, including the front concrete strain gauge monitoring section, the middle concrete strain gauge monitoring section and the rear concrete strain gauge monitoring section.

[0033] In the three monitoring sections of the rebar meter monitoring group, namely the front rebar meter monitoring section, the middle rebar meter monitoring section and the rear rebar meter monitoring section, each monitoring section has rebar meters arranged horizontally at the top plate, side wall and middle plate respectively.

[0034] In the front concrete strain gauge monitoring section, the middle concrete strain gauge monitoring section and the rear concrete strain gauge monitoring section of the concrete strain gauge monitoring group, concrete strain gauges are arranged horizontally on the top plate, the side wall and the middle plate of each monitoring section.

[0035] like Figure 2As shown, the monitoring signal points also include loop monitoring signal points, and a steel bar gauge or a concrete strain gauge is installed on both sides of the loop connection of the loop monitoring signal point.

[0036] like Figure 3 As shown, the monitoring signal points also include top longitudinal beam monitoring signal points, and steel bar gauges or concrete strain gauges are arranged on the top longitudinal beam, middle, bottom and sides of the top longitudinal beam monitoring signal points.

[0037] like Figure 4 As shown, the monitoring signal points also include monitoring signal points at joints, and steel bar gauges or concrete strain gauges are respectively installed on both sides of the joints of the monitoring signal points at the joints.

[0038] The monitoring and control system of the utility model is provided with an automatic collection module for collecting and analyzing data once every 4-6 hours, and is provided with a prompt module for issuing an early warning for data exceeding a threshold value.

[0039] Collection boxes are installed on both sides of the middle of the prefabricated subway station, and are equipped with doors that are easy to open. The lines connecting each monitoring signal point are laid on both sides and concentrated in the collection boxes.

[0040] The utility model can be used to analyze the variation law of strain under the construction load, and can be used to master the deformation characteristics of the assembled subway station structure during its construction and operation, to ensure the construction quality and safety, and to provide a reference for the deformation monitoring of assembled subway stations. The utility model can also be used to fit according to the monitoring data to reveal the inherent law of the environment and the monitoring data.

[0041] The present invention is further described in detail below in conjunction with specific embodiments:

[0042] Taking the Wuxi Metro Nanmen Station project as an example, the monitoring data is fitted to determine the safety status of the structural components; the structural design model is modified based on the monitoring results; the variation of strain is analyzed under the action of construction loads; compared with the design displacement limit, an early warning is issued when the structure has excessive support displacement deformation; the displacement data is used, combined with the measurement data of the relationship between structural environmental conditions such as temperature and structural component strain, to modify the structural design model.

[0043] Combined with the structural form and stress characteristics of Nanmen Station, a total of 6 main characteristic monitoring sections are set up: section at the 3rd axis, section at the 4th axis, section at the 8th axis, section at the 10th axis, section at the 12th axis, and section at the 13th axis. The monitoring sensors are steel bar gauges or concrete strain gauges; steel bar gauges are installed at the sections at the 3rd axis, 8th axis, and 12th axis on one side, and concrete strain gauges are installed at the sections at the 4th axis, 10th axis, and 13th axis on the other side, with 3 steel bar gauges or concrete strain gauges arranged horizontally at each location; all-round monitoring of the stress, deformation, cracks, etc. of prefabricated components is carried out; 4-6 steel bar gauges or concrete strain gauges are arranged at the buckles, top beams, and joints respectively to monitor the stress and strain at key connections.

[0044] After completing the installation of sensors on the top plate, side wall of the first negative floor, side wall of the second negative floor and middle plate of all monitoring sections (section at the 3rd axis, section at the 4th axis, section at the 8th axis, section at the 10th axis, section at the 12th axis and section at the 13th axis), as well as the installation of sensors on each panel at the buckle, top beam and joint, the initial data collection work is carried out and regular monitoring is carried out as required; the main test conditions currently include before loading of prefabricated panels (after pouring), before hoisting, after hoisting, before pouring of post-casting strips and after pouring of post-casting strips; after the panel installation is stable, the monitoring plan requires every 7 days The frequency of one round of monitoring is to test the data of the installed sensors, and the test frequency is increased for important working conditions. After that, the installation of the automated data collection equipment is carried out, and the installation of each integrated data collection equipment is completed, and all sensor wiring is connected to the automated data collection system; the monitoring data is set to collect data every 6 hours; as the installation of the monitoring panels is gradually completed, the sensor lines of each panel are laid one after another, and the line laying is carried out as follows: ① The line is laid through the middle board decorative layer, vertically occupying a height of 5 to 10 cm and horizontally occupying a width of 20 cm to 40 cm;

[0045] ②The collection box is mainly installed on the side wall of the 10-axis doorway, and the lines on both sides are laid centrally there.

[0046] The above description is only a preferred embodiment of the utility model and does not constitute any form of limitation to the utility model. Any technician familiar with the profession, without departing from the scope of the technical solution of the utility model and based on the technical essence of the utility model, any simple modification, equivalent replacement and improvement made to the above embodiment shall still fall within the scope of protection of the technical solution of the utility model.

Claims

1. An assembled subway station dynamic response monitoring system, characterized by: It includes a steel bar meter, a concrete strain gauge and a monitoring control system. The steel bar meter and the concrete strain gauge are installed at several monitoring signal points according to the structure of the prefabricated subway station, and are respectively connected to the monitoring control system for data collection and analysis and monitoring and early warning through signal lines; the monitoring signal points include the monitoring signal points of the top plate of the prefabricated subway station, the monitoring signal points of the side wall of the prefabricated subway station and the monitoring signal points of the middle plate of the prefabricated subway station; The monitoring signal points of the roof of the assembled subway station, the monitoring signal points of the side walls of the assembled subway station and the monitoring signal points of the middle plate of the assembled subway station are respectively provided with two groups, which are respectively located at the opposite sides of the assembled subway station. Each group is provided with the front, middle and rear three monitoring signal positions, and the positions of the front, middle and rear three monitoring signal points of the two groups are staggered front and back in sequence, forming a total of six monitoring sections; The first group is the rebar meter monitoring group at one end of the prefabricated subway station, including the front rebar meter monitoring section, the middle rebar meter monitoring section and the rear rebar meter monitoring section; the second group is the concrete strain gauge monitoring group at the other side of the prefabricated subway station opposite to the first group, including the front concrete strain gauge monitoring section, the middle concrete strain gauge monitoring section and the rear concrete strain gauge monitoring section.

2. The dynamic response monitoring system for assembled subway stations according to claim 1 is characterized in that: In the three monitoring sections of the rebar meter monitoring group, namely the front rebar meter monitoring section, the middle rebar meter monitoring section and the rear rebar meter monitoring section, each monitoring section has rebar meters arranged horizontally at the top plate, side wall and middle plate respectively.

3. The dynamic response monitoring system for assembled subway stations according to claim 1 is characterized in that: In the front concrete strain gauge monitoring section, the middle concrete strain gauge monitoring section and the rear concrete strain gauge monitoring section of the concrete strain gauge monitoring group, concrete strain gauges are arranged horizontally on the top plate, the side wall and the middle plate of each monitoring section.

4. The dynamic response monitoring system for assembled subway stations according to claim 1 is characterized in that: The monitoring signal points also include loop monitoring signal points, and a steel bar gauge or a concrete strain gauge is respectively installed on both sides of the loop connection of the loop monitoring signal points.

5. The dynamic response monitoring system for assembled subway stations according to claim 1 is characterized in that: The monitoring signal points also include top longitudinal beam monitoring signal points, and steel bar gauges or concrete strain gauges are arranged on the top longitudinal beam, middle, bottom and sides of the top longitudinal beam monitoring signal points.

6. The assembled subway station dynamic response monitoring system according to claim 1 is characterized by: The monitoring signal points also include monitoring signal points at joints, and a steel bar gauge or a concrete strain gauge is installed on both sides of the joints of the monitoring signal points at the joints.

7. The dynamic response monitoring system for assembled subway stations according to claim 1 is characterized in that: The monitoring and control system is provided with an automatic collection module for collecting and analyzing data every 4-6 hours, and a prompt module for issuing an early warning for data exceeding a threshold value.

8. The dynamic response monitoring system for assembled subway stations according to claim 1 is characterized in that: Collection boxes are installed on both sides of the middle of the prefabricated subway station, and are equipped with doors that are easy to open. The lines connecting each monitoring signal point are laid on both sides and concentrated in the collection boxes.

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