CN111800754A - Self-sensing and self-early warning temporary support system and construction method thereof - Google Patents
Self-sensing and self-early warning temporary support system and construction method thereof Download PDFInfo
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- CN111800754A CN111800754A CN202010649416.1A CN202010649416A CN111800754A CN 111800754 A CN111800754 A CN 111800754A CN 202010649416 A CN202010649416 A CN 202010649416A CN 111800754 A CN111800754 A CN 111800754A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/38—Services specially adapted for particular environments, situations or purposes for collecting sensor information
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G25/00—Shores or struts; Chocks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/10—Measuring force or stress, in general by measuring variations of frequency of stressed vibrating elements, e.g. of stressed strings
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C19/00—Electric signal transmission systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
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Abstract
The invention relates to the technical field of structure monitoring, in particular to a self-sensing self-early warning temporary support system, which comprises three subsystems: the system comprises a sensor subsystem, a data acquisition and transmission subsystem and a safety evaluation and alarm early warning subsystem; the sensor subsystem consists of a BGK-4000 arc welding type vibrating wire strain gauge, a sensor mounting block and a matching cable; the method has the advantages of convenient operation and wide application range, can synchronously monitor the stress difference value of the sensors at each distribution point, feeds the stress difference value back to monitoring software in real time, processes monitoring data through a formulated program, and provides reliable basis for the safety of the temporary supporting structure. The self-sensing self-early warning temporary support system has the advantages of simple manufacturing process, reasonable economic manufacturing cost, simplicity and convenience in operation, high synchronous monitoring precision and the like, can be recycled, and is suitable for construction of various long-span steel structures needing temporary support.
Description
Technical Field
The invention relates to the technical field of structure monitoring, in particular to a self-sensing and self-early-warning temporary support system and a construction method thereof.
Background
Due to the development of the design of the space steel structure towards the direction of large span, multiple functions and complex shape, the construction of the large span steel structure faces new challenges. To ensure construction safety, temporary bracing is increasingly applied to the construction process of steel structures.
However, due to the problems of long manufacturing period, high recycling, inaccurate pre-estimation of construction conditions, complex service environment and the like of the temporary support, construction safety accidents caused by failure of the temporary support at the present stage often occur, for example: temporary support fracture and collapse accidents on construction sites of Yizhou coal coking coal yard closed projects, and temporary support collapse and hit viaduct ramp of Shanghan high-speed railway in Shanghan province. How to know the condition of being in service of interim bearing structure self effectively, and then ensure the safety of interim support in the work progress has become an important link of guaranteeing long-span steel construction safety.
At present, a practical monitoring system for self-sensing and self-warning of a temporary supporting structure is urgently needed to be invented, and before the temporary supporting structure has a safety problem, warning can be realized through the system, and further safety accidents can be eliminated through human intervention.
Disclosure of Invention
The invention aims to provide a self-sensing and self-warning temporary support system and a construction method of the self-sensing and self-warning temporary support system, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention provides a self-sensing and self-warning temporary support system, which comprises three subsystems: the system comprises a sensor subsystem, a data acquisition and transmission subsystem and a safety evaluation and alarm early warning subsystem; the sensor subsystem consists of a BGK-4000 arc welding type vibrating wire strain gauge, a sensor mounting block and a matching cable; the data acquisition and transmission subsystem consists of a data transmission cable/optical cable, a digital-to-analog conversion card, a sensor subsystem matching demodulator, an automatic data acquisition instrument, a wireless transmission module and the like; the safety assessment and alarm early warning subsystem: the software is in a modular design and comprises a database management system, a safety early warning system and the like.
The self-perception self-early-warning temporary support system has the advantages that monitoring data can be collected in real time by each monitoring sensor, the monitoring data are wirelessly transmitted to the safety assessment and alarm early-warning subsystem through the automatic collection instrument, if the collected data are abnormal, the system can realize multiple means of alarming (short messages, mobile phone screen lightening, vibration and the like) through the APP and upload the data to the cloud service data center, and the monitoring center can automatically complete data analysis, safety assessment and early warning according to a large amount of received data.
The sensor subsystem is a system hardware, namely a BGK-4000 arc welding type vibrating wire strain gauge, and the BGK-4000 arc welding type vibrating wire strain gauge is provided with an installation block. The temporary supports are usually fixed by means of welded or glued mounting blocks, which are provided in pairs with conical fixing screws, and the surfaces of the welded or glued bars should be cleaned. When the sensor is installed, the length of the installation rod is determined, then the installation block is welded or stuck on the temporary supporting structure, and the sensor is installed before construction.
The temperature expansion coefficient of a sensor of the sensor subsystem is the same as that of a temporary support steel structure to be detected, and the sensor subsystem has high precision and sensitivity, excellent waterproof performance, corrosion resistance and long-term stability. The sensor functions in sensing the temporary supported load and effect information and outputting the information in the form of physical parameters such as frequency, temperature and the like. The sensor has special four-core shielded cable to transmit frequency and temperature resistance signals, the frequency and the signals are not influenced by the length of the cable, and the sensor is suitable for monitoring the strain change of the rod piece in a severe environment for a long time.
The data acquisition and transmission subsystem: the system mainly comprises a data transmission cable/optical cable, a digital-to-analog conversion card, a sensor subsystem matching demodulator and the like, and an automatic data acquisition instrument for data acquisition and transmission. The data acquisition and transmission subsystem can complete automatic acquisition, and adopts a BGK-MICRO-40 type automatic data acquisition instrument with wireless transmission and acquisition functions, namely a distributed network measurement system. A matched software system is based on a WINDOWS98/Me/NT/2000/XP/7 working platform, integrates user management, measurement management, data management and communication management, and realizes automatic measurement of engineering and real-time data acquisition.
The safety assessment and alarm early warning subsystem is a set of dynamic monitoring and early warning service software based on cloud platform data storage, and the software has the basic functions of: the data monitoring system has the advantages that the real-time data acquisition of each monitoring sensor can be realized, if the received data is abnormal, the alarm (short message, mobile phone screen lightening, vibration and the like) can be realized through various means through the APP, the data can be uploaded to a cloud service data center, and the data analysis, safety assessment and early warning can be automatically completed by the monitoring center according to a large amount of received data.
The construction method of the self-sensing and self-warning temporary support system comprises the following steps:
the method comprises the following steps: analyzing the use characteristics of the temporary support of a specific project, and determining the vulnerable position of the temporary support rod piece by simulation analysis of the construction process through finite element general software; determining the distribution position of the sensors and collecting instruments on the temporary support according to the vulnerability analysis result, optimizing a sensor subsystem and a data collecting and transmitting subsystem according to the instrument characteristics and the sensor requirements, and determining the number of the sensors and the automatic collecting instruments;
step two: installing the sensors at the designed layout positions according to the monitoring scheme in the step one, verifying whether the performance of the sensors is intact, and connecting the matched data line cables of the sensors after the sensors are determined to be available;
step three: and arranging a PVC sleeve along the data line cable of each measuring point sensor along the support frame, wherein the data line penetrates through the sleeve and is gathered at the automatic data acquisition instrument. Each wiring has external protection measures at the exposed part of the ground and has clear and definite serial numbers and marks. The wiring groove of weak current engineering is adopted as far as possible for line walking, and the wiring groove is laid automatically when necessary.
Step four: the connection between the sensor data line and the data acquisition channel of the automatic acquisition instrument is connected according to a system topological graph and a physical connection graph. The connecting cable is required to be attached with a corresponding label so as to be convenient for later maintenance and troubleshooting and prevent a connecting port from being wrong; checking the correct transmission of signals of each sensor of the automatic acquisition system, and acquiring and recording original values for future reference by data;
step five: and performing centralized test on the equipment, connecting all the equipment according to the implementation scheme, and performing data receiving test of each test by using data receiving software.
1) Checking whether the acquisition parameter setting of each sensor meets the design requirement;
2) when a design requires multiple acquisition strategies, whether the sensor can correctly return a test signal or not is respectively tested according to each acquisition strategy;
3) the response time of the data collected by a single sensor is required to meet the requirements of design and product technical documents;
4) and the synchronous precision of each sensor is less than 5s during static synchronous acquisition.
5) The serial numbers and data of the sensors are completely corresponding in a field database and a remote database;
6) the sensor data should correspond to its physical location;
7) the data storage accuracy should not be less than the resolution of the sensor.
8) The measurement data of each sensor should not exceed the measurement range of the sensor and the measurement range specified by the design file.
Step six: the application method of the monitoring system comprises the following steps:
1) reasonable programs and parameters are set in a monitoring software system, so that the accuracy of data acquired and transmitted can meet the requirements;
2) when the steel structure installation is carried out in a sectional manner in different areas, the stress change condition of the position of the sensor on the self-sensing self-early warning temporary support can be estimated through numerical simulation calculation, and the installation is guided through test data;
3) if the data of the item 2) has larger deviation with the theoretical value, reporting to a constructor, and continuing to install after stopping searching for reasons;
4) after the final installation is finished, the installation completion condition can be effectively judged through the intelligent temporary support data;
5) if the APP in the system application process has the alarm condition, the construction side should stop immediately, search the alarm reason, and continue to install after the potential safety hazard is eliminated.
Step seven: after the site construction is finished, the monitoring center automatically completes data analysis and safety assessment of the structural state according to the received large amount of collected data as soon as possible. The safety of the intelligent temporary support and the safety performance of the whole steel structure installation process are effectively controlled.
Step eight: the method for dismantling the monitoring system comprises the following steps:
1) after the monitoring is finished at a certain construction stage according to the approval of an owner, the monitoring system needs to be dismantled and recycled within a specified time period;
2) when the comprehensive working surface is withdrawn, monitoring lines, equipment and the like must be withdrawn according to the regulations;
3) the removed equipment must be recovered and stored according to the protection measures of the equipment, and the equipment can be ensured to be recycled.
The self-sensing and self-warning temporary support system and the construction method are suitable for various construction projects adopting temporary supports as multi-layer large-span steel structures.
Compared with the prior art, the invention has the beneficial effects that:
1. the self-sensing and self-early warning temporary support system provided by the invention provides real-time warning and query functions of a mobile phone APP by arranging a sensor system, a data acquisition and transmission system and a warning and early warning system, and realizes remote safety monitoring and real-time early warning in a construction process of a large-span steel structure project.
2. The self-sensing and self-warning temporary support system integrates intellectualization and informatization, and realizes the combination of the support of the temporary support system and the automatic safety monitoring function; monitoring data transmission is wireless transmission, and data transmission automation is realized; and through integrated early warning and aassessment software in the cell-phone APP, realize the early warning of the self safety of bed-jig structure and report to the police, this monitoring system design is advanced reasonable, and monitoring accuracy is high, modular structure, operation control reliability is high.
3. The self-sensing and self-warning temporary support system does not influence the original construction process of the project, is convenient to operate and wide in application range, can synchronously monitor the stress difference value of the sensors at each distribution point, feeds the stress difference value back to monitoring software in real time, processes monitoring data through a formulated program, and provides a reliable basis for the safety of the temporary support structure.
4. The self-sensing self-early warning temporary support system has the advantages of simple manufacturing process, reasonable economic manufacturing cost, simplicity and convenience in operation, high synchronous monitoring precision and the like, can be recycled, and is suitable for construction engineering of various long-span steel structures adopting temporary support.
Drawings
Fig. 1 is a schematic view of a construction structure according to an embodiment of the present invention.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present invention provides an embodiment:
the method comprises the following steps: analyzing the use characteristics of the temporary support of a specific project, and determining the vulnerable position of the temporary support rod member 1 by simulation analysis of the construction process through finite element general software; determining the distribution position of the sensors on the temporary support and collecting instruments according to the vulnerability analysis result, optimizing a sensor subsystem and a data collecting and transmitting subsystem according to the instrument characteristics and the sensor requirements, and determining the number of the sensors 2 and the automatic collecting instruments 3;
step two: installing the sensor 2 at a designed layout position according to the monitoring scheme in the step one, verifying whether the performance of the sensor 2 is intact by using a red box 4, and connecting a data line cable matched with the sensor 2 after determining that the sensor 2 is available;
step three: arranging a PVC sleeve along the data line cable of each measuring point sensor 2 along the support frame, and enabling the data line to penetrate through the sleeve and be gathered at the automatic data acquisition instrument 3; each wiring is provided with an external protection measure at the exposed part of the ground and is provided with a clear number and an identification; the wiring groove of weak current engineering is adopted as far as possible for line walking, and the wiring groove is laid automatically when necessary.
Step four: the connection between the sensor data line and the data acquisition channel of the automatic acquisition instrument is connected according to a system topological graph and a physical connection graph. The connecting cable is required to be attached with a corresponding label so as to be convenient for later maintenance and troubleshooting and prevent a connecting port from being wrong; checking the correct transmission of signals of each sensor of the automatic acquisition system, and acquiring and recording original values for future reference by data;
step five: and performing centralized test on the equipment, connecting all the equipment according to the implementation scheme, and performing data receiving test of each test by using data receiving software.
1) Checking whether the acquisition parameter setting of each sensor meets the design requirement;
2) when a design requires multiple acquisition strategies, whether the sensor can correctly return a test signal or not is respectively tested according to each acquisition strategy;
3) the response time of the data collected by a single sensor is required to meet the requirements of design and product technical documents;
4) and the synchronous precision of each sensor is less than 5s during static synchronous acquisition.
5) The serial numbers and data of the sensors are completely corresponding in a field database and a remote database;
6) the sensor data should correspond to its physical location;
7) the data storage accuracy should not be less than the resolution of the sensor.
8) The measurement data of each sensor should not exceed the measurement range of the sensor and the measurement range specified by the design file.
Step six: the application method of the monitoring system comprises the following steps:
1) reasonable programs and parameters are set in a monitoring software system, so that the accuracy of data acquired and transmitted can meet the requirements;
2) when the steel structure installation is carried out in a sectional manner in different areas, the stress change condition of the position of the sensor on the self-sensing self-early warning temporary support can be estimated through numerical simulation calculation, and the installation is guided through test data;
3) if the data of the item 2) has larger deviation with the theoretical value, reporting to a constructor, and continuing to install after stopping searching for reasons;
4) after the final installation is finished, the installation completion condition can be effectively judged through the intelligent temporary support data;
5) if the APP in the system application process has the alarm condition, the construction side should stop immediately, search the alarm reason, and continue to install after the potential safety hazard is eliminated.
Step seven: after the site construction is finished, the monitoring center automatically completes data analysis and safety assessment of the structural state according to the received large amount of collected data as soon as possible. The safety of the intelligent temporary support and the safety performance of the whole steel structure installation process are effectively controlled.
Step eight: the method for dismantling the monitoring system comprises the following steps:
1) after the monitoring is finished at a certain construction stage according to the approval of an owner, the monitoring system needs to be dismantled and recycled within a specified time period;
2) when the comprehensive working surface is withdrawn, monitoring lines, equipment and the like must be withdrawn according to the regulations;
3) the removed equipment must be recovered and stored according to the protection measures of the equipment, and the equipment can be ensured to be recycled.
Claims (4)
1. A self-sensing and self-early warning temporary support system is characterized by comprising a sensor subsystem, a data acquisition and transmission subsystem and a safety evaluation and warning early warning subsystem; the sensor subsystem consists of a strain gauge, a sensor mounting block and a matched cable; the data acquisition and transmission subsystem consists of a data transmission cable/optical cable, a digital-to-analog conversion card, a sensor subsystem matching demodulator, an automatic data acquisition instrument, a wireless transmission module and a monitoring sensor; the safety assessment and alarm early warning subsystem comprises a sensor system, a data acquisition system, a database management system and a safety early warning system, monitoring data can be acquired by a monitoring sensor in real time, the monitoring data are wirelessly transmitted to the safety assessment and alarm early warning subsystem through an automatic acquisition instrument, when the acquired data are abnormal, the safety assessment and alarm early warning subsystem realizes alarming through APP, the data are uploaded to a cloud service data center, and the cloud service data center automatically completes data analysis, safety assessment and early warning according to a large amount of received data.
2. The self-sensing self-warning temporary support system according to claim 1, wherein: the sensor subsystem is a BGK-4000 arc welding type vibrating wire strain gauge, the BGK-4000 arc welding type vibrating wire strain gauge is provided with an installation block, the installation block is fixed on a temporary support in a welding or bonding mode, the installation blocks are provided in pairs, and conical tip fixing screws are arranged on the installation blocks.
3. The self-sensing self-warning temporary support system according to claim 1, wherein: the data acquisition and transmission subsystem adopts a BGK-MICRO-40 type automatic data acquisition instrument and a distributed network measurement system which have wireless transmission and acquisition functions, is used for integrating user management, measurement management, data management and communication management, can complete automatic acquisition and realizes automatic measurement of engineering and real-time data acquisition.
4. A construction method of a self-sensing and self-warning temporary support system is characterized by comprising the following steps: the construction method comprises the following steps:
the method comprises the following steps: analyzing the use characteristics of the temporary support of a specific project, and determining the vulnerable position of the temporary support rod piece by simulation analysis of the construction process through finite element general software; determining the distribution position of the sensors and collecting instruments on the temporary support according to the vulnerability analysis result, optimizing a sensor subsystem and a data collecting and transmitting subsystem according to the instrument characteristics and the sensor requirements, and determining the number of the sensors and the automatic collecting instruments;
step two: installing the sensors at the designed layout positions according to the monitoring scheme in the step one, verifying whether the performance of the sensors is intact by using a red box, and connecting a data line cable matched with the sensors after the sensors are determined to be usable;
step three: arranging a PVC sleeve along a data line cable of each measuring point sensor along a support frame body, wherein the data line penetrates through the sleeve and is gathered at an automatic data acquisition instrument; each wiring is provided with an external protection measure at the exposed part of the ground and is provided with a clear number and an identification; adopting a wire groove of weak current engineering to walk the line as much as possible, and automatically laying the wire groove when necessary;
step four: the connection between the sensor data line and the data acquisition channel of the automatic acquisition instrument is connected according to a system topological graph and a physical connection graph; the connecting cable is required to be attached with a corresponding label so as to be convenient for later maintenance and troubleshooting and prevent a connecting port from being wrong; checking the correct transmission of signals of each sensor of the automatic acquisition system, and acquiring and recording original values for future reference by data;
step five: the equipment centralized test is carried out, all the equipment are connected according to the implementation scheme, and data receiving software is used for carrying out data receiving test of each test;
1) checking whether the acquisition parameter setting of each sensor meets the design requirement;
2) when a design requires multiple acquisition strategies, whether the sensor can correctly return a test signal or not is respectively tested according to each acquisition strategy;
3) the response time of the data collected by a single sensor is required to meet the requirements of design and product technical documents;
4) the synchronous precision of each sensor is less than 5s during static synchronous acquisition;
5) the serial numbers and data of the sensors are completely corresponding in a field database and a remote database;
6) the sensor data should correspond to its physical location;
7) the data storage precision is not lower than the resolution of the sensor;
8) the measurement data of each sensor should not exceed the measurement range of the sensor and the measurement range specified by the design file;
step six: the application method of the monitoring system comprises the following steps:
1) reasonable programs and parameters are set in a monitoring software system, so that the accuracy of data acquired and transmitted can meet the requirements;
2) when the steel structure installation is carried out in a sectional manner in different areas, the stress change condition of the position of the sensor on the self-sensing self-early warning temporary support can be estimated through numerical simulation calculation, and the installation is guided through test data;
3) if the data of the item 2) has larger deviation with the theoretical value, reporting to a constructor, and continuing to install after stopping searching for reasons;
4) after the final installation is finished, the installation completion condition can be effectively judged through the intelligent temporary support data;
5) if the APP is in an alarm condition in the application process of the system, the construction side should shut down immediately, search for the reason of the alarm, and continue to install after potential safety hazards are eliminated;
step seven: after the site construction is finished, the monitoring center automatically completes data analysis and safety assessment of the structural state according to the received large amount of collected data as soon as possible; the safety of intelligent temporary support and the safety performance of the whole steel structure installation process are effectively controlled;
step eight: the method for dismantling the monitoring system comprises the following steps:
1) after the monitoring is finished at a certain construction stage according to the approval of an owner, the monitoring system needs to be dismantled and recycled within a specified time period;
2) when the comprehensive working surface is withdrawn, monitoring lines, equipment and the like must be withdrawn according to the regulations;
3) the removed equipment must be recovered and stored according to the protection measures of the equipment, and the equipment can be ensured to be recycled.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116522451A (en) * | 2023-05-08 | 2023-08-01 | 江苏泰源环保科技股份有限公司 | Steel structure assembled sewage treatment pool deformation early warning method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116522451A (en) * | 2023-05-08 | 2023-08-01 | 江苏泰源环保科技股份有限公司 | Steel structure assembled sewage treatment pool deformation early warning method |
| CN116522451B (en) * | 2023-05-08 | 2023-10-10 | 江苏泰源环保科技股份有限公司 | Steel structure assembled sewage treatment pool deformation early warning method |
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