CN113155071A - Foundation pit slope horizontal displacement safety monitoring system - Google Patents
Foundation pit slope horizontal displacement safety monitoring system Download PDFInfo
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Abstract
The invention provides a safety monitoring system for horizontal displacement of a foundation pit slope, which comprises: the system comprises a horizontal displacement detection system, a monitoring information processing system and a visual management system; the horizontal displacement detection system comprises a data acquisition unit and a parameter setting unit, wherein the data acquisition unit is used for acquiring initial readings of monitoring points and data information of displacement change of each time, and the parameter setting unit is used for setting acquisition parameters and an early warning judgment mode according to a user instruction; the monitoring information processing system is used for analyzing the monitoring information and outputting early warning judgment information based on the analysis result; the visual management system is connected with the monitoring information processing system and is used for visually displaying the monitoring data and analyzing displacement factors.
Description
Technical Field
The invention relates to the technical field of building measurement, in particular to a safety monitoring system for horizontal displacement of a foundation pit slope.
Background
With the acceleration of the urbanization process, the demand for adding high-rise buildings such as subways, residential buildings and office buildings is increased, deep foundation pits are usually dug in many high-rise buildings or large commercial areas, the underground space of a land parcel is increased, the influence or huge asset loss on surrounding buildings and the like is caused when the horizontal displacement of the deep foundation pit exceeds an allowable deformation range, and how to timely acquire the displacement of the enclosure structure and the deformation condition of a soil body and ensure the safety in the construction period of the foundation pit needs to measure the horizontal displacement of the deep foundation pit. However, the monitoring and early warning for the foundation pit is mainly determined by the accumulated displacement and the displacement change rate detected by manpower or instruments, and a data error may exist in the data entry process or the problem that the alarm value monitoring is not accurate enough due to complex terrain exists.
In conclusion, the safety monitoring system for the horizontal displacement of the foundation pit slope, which can effectively avoid manual detection errors, improve detection precision and efficiency, simultaneously perform abnormity alarm in time and automatically analyze the change influence factors of the horizontal displacement, is a problem which needs to be solved by technical personnel in the field.
Disclosure of Invention
In order to solve the problems and requirements, the scheme provides a safety monitoring system for horizontal displacement of the foundation pit slope, and the technical problems can be solved by adopting the following technical scheme.
In order to achieve the purpose, the invention provides the following technical scheme: a foundation pit slope horizontal displacement safety monitoring system includes: the system comprises a horizontal displacement detection system, a monitoring information processing system and a visual management system;
the horizontal displacement detection system comprises a data acquisition unit and a parameter setting unit, wherein the data acquisition unit is used for acquiring initial readings of monitoring points and data information of displacement change of each time, and the parameter setting unit is used for setting acquisition frequency, acquisition duration, a foundation pit displacement alarm value and an early warning judgment mode according to a user instruction;
the monitoring information processing system is used for receiving monitoring information sent by the horizontal displacement detection system, analyzing the monitoring information and outputting early warning judgment information based on an analysis result, and comprises a data analysis unit and an early warning unit;
the visual management system is connected with the monitoring information processing system and used for visually displaying monitoring data and analyzing displacement factors, and the visual management system comprises a visual unit and a displacement analysis unit.
Furthermore, the data acquisition unit comprises a monitoring management module and a data communication module, and the monitoring management module comprises a data detection module and a monitoring point coding module;
the data detection module comprises a total station detection module and an inclinometer detection module, the total station detection module is used for determining coordinate data of each monitoring point in an engineering coordinate by adopting a total station fulcrum method and a GPS-RTK (global position system-real time kinematic) chart root control method according to a plurality of laid horizontal displacement datum points and supporting structure horizontal displacement monitoring points, the inclinometer detection module comprises an automatic lifting detector and an inclinometer pipe, the automatic lifting detector is arranged in the inclinometer pipe and comprises a probe and an automatic lifting platform, the probe comprises a laser sensor and an angle sensor, and the monitoring point coding module is used for distributing unique identification codes and data storage addresses to the monitoring points;
the data communication module is used for sending detection data to the monitoring information processing system, the data communication module comprises a Zigbee communication module and a radio frequency module, the radio frequency module comprises a plurality of active detection tags arranged at each monitoring point and a data read-write module, and the data read-write module acquires a secret code when reading information from the active detection tags and analyzes the secret code to obtain decrypted transmission data.
Furthermore, the automatic lifting platform comprises a base, a shock-proof device and a lifting slide rail, wherein a driving motor is arranged inside the base and used for driving the rotating wheel, the probe is further pulled through a cable wound on the rotating wheel, pulleys are arranged on two sides of the probe and can slide along the lifting slide rail, the lifting slide rail is arranged on the inner side wall of the inclinometer pipe, the shock-proof device comprises a vibration isolation rubber support, and the rubber support is arranged at the lower end of the base.
Furthermore, the data analysis unit comprises a displacement information analysis module, an early warning module and an instruction control module;
the displacement information analysis module judges the alarm state and grade based on the horizontal displacement sensing monitoring information acquired by the data acquisition unit, the displacement information analysis module comprises a displacement information cache module, a current early warning discrimination module and an amplification early warning discrimination module, the displacement information cache module structurally caches the displacement data of the foundation pit side slope detected by the data acquisition unit, the current early warning discrimination module compares the monitoring information of each current monitoring point with a set current maximum alarm threshold and a set current minimum alarm threshold to obtain the alarm result at the current moment, the amplification early warning discrimination module adopts a ring ratio amplification comparison mode and a mean value amplification comparison mode, and the ring ratio amplification comparison mode performs amplification comparison on the displacement data at the current moment and the depth displacement data corresponding to the previous detection period, if the increase amplitude of the comparison between the displacement data at the current moment and the displacement data in the previous detection period is greater than a preset value, carrying out automatic early warning, wherein the average value increase comparison mode carries out increase comparison between the displacement data at the current moment and the average value of the corresponding depth displacement data in the previous k-1 detection periods, and if the increase amplitude of the comparison between the displacement data at the current moment and the average value of the corresponding depth displacement data in the previous k-1 detection periods is greater than the preset value, carrying out automatic early warning;
the early warning module is connected with the early warning unit and used for sending the warning state and warning grade information output by the displacement information analysis module to the early warning unit for on-site warning and remote warning, the early warning unit comprises an on-site warning terminal and a remote warning module, and the remote warning module is used for sending warning information to the visual management system and the user mobile terminal in a wireless mode;
the instruction control module is used for sending updating and user control instructions to the horizontal displacement detection system in a wireless mode.
Furthermore, each active detection tag comprises an RFID module and a parameter updating module, the RFID module sends displacement detection information of the inclinometer detection module to the data reading and writing module, the data reading and writing module sends received information to the data analysis unit at regular time through the Zigbee communication module and receives an instruction signal of the instruction control module, and the parameter updating module is used for receiving a data updating instruction sent by the data reading and writing module when a user updates data; the data read-write module sends the updating data transmitted by the instruction control module to each electronic tag needing updating data by transmitting radio frequency signals to realize the writing of the updating data; and after the writing action is completed, the data reading and writing module performs reading and writing verification on the updated and written electronic tag, if the verification fails, the updated data is rewritten, and if the verification succeeds, the data updating action is judged to be completed.
Further, the on-site alarm terminal includes controlling means, distributed audio alert device and electric energy power module, distributed audio alert device with controlling means is connected, electric energy power module is used for doing controlling means with distributed audio alert device provides required voltage source, electric energy power module includes solar energy power module, lithium cell power module and USB charging module, lithium cell power module includes lithium cell and battery management chip, USB charging module includes the USB boost circuit board, lithium cell power module is used for carrying out reserve power supply when solar energy power module voltage is not enough, USB charging module is used for doing lithium cell power module provides external voltage.
Furthermore, the visualization unit is connected with the early warning module, the visualization unit comprises a data storage statistics module, a report inquiry module and a visualization display module, the data storage statistics module collects and counts the alarm information of each monitoring point to obtain a data storage library of each monitoring point, the report inquiry module is used for carrying out data inquiry, and the visualization display module is used for displaying the early warning information and the displacement data of different depths of each monitoring point through a large screen.
Further, the displacement analysis unit comprises an index construction module, a model construction module and a report output module, wherein the index construction module is used for constructing the correlation influencing the horizontal displacement according to the influenceIndex data construction evaluation index set U ═ U1,u2,...,unN is the number of evaluation indexes; initializing the weight of the related index data in the index set U by the model establishing module to obtain a weight initial value, and establishing a hierarchical structure model based on the related index data in the index system and the weight initial value, wherein the hierarchical structure model comprises a target layer, a criterion layer and a factor layer; according to the scale principle of an FAHP weighting method, the importance degree of index detection values of every two displacements in different time periods is graded, a fuzzy complementary judgment matrix is constructed, matrix data in the fuzzy complementary judgment matrix are subjected to traversal and consistency processing, a fuzzy consistency matrix is obtained, and the fuzzy consistency matrix meets the consistency condition; calculating the maximum characteristic root of the fuzzy consistency matrix and normalizing the fuzzy consistency matrix to obtain a characteristic vector, wherein the characteristic vector is a single-row weight vector of each row, then calculating the total weight of each layer in an accumulated manner, and finally performing weight normalization to obtain the total weight of each element index; according to the weight of each layer index, according to
Calculating the comprehensive weight of each index of the factor layer relative to the target layer, wherein wrRepresenting the weight of the r-th criterion layer relative to the target,
and obtaining the influence factors of the displacement change condition of each time period for the weight of the jth factor in the ith criterion layer relative to the ith criterion, and then forming a displacement change condition report of each time period through the report output module, wherein the report output module controls the intelligent printer to print.
According to the technical scheme, the invention has the beneficial effects that: the invention can effectively avoid manual detection errors, improve detection precision and efficiency, simultaneously can timely alarm for abnormity, and automatically analyze the change influence factors of horizontal displacement.
In addition to the above objects, features and advantages, preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings so that the features and advantages of the present invention can be easily understood.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments of the present invention or the prior art will be briefly described, wherein the drawings are only used for illustrating some embodiments of the present invention and do not limit all embodiments of the present invention thereto.
Fig. 1 is a schematic structural diagram of a horizontal displacement safety monitoring system for a foundation pit slope according to the present invention.
Fig. 2 is a schematic diagram of a composition structure of the monitoring management module according to the present invention.
Fig. 3 is a schematic structural diagram of the early warning unit according to the present invention.
Fig. 4 is a schematic structural diagram of a data communication module according to the present invention.
Fig. 5 is a schematic step diagram of the shift factor analysis process in this embodiment.
Fig. 6 is a schematic structural view of the automatic lifting table of the present invention.
Reference numerals: base 1, shock-proof device 2, lifting slide rail 3 and probe 4
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of specific embodiments of the present invention. Like reference symbols in the various drawings indicate like elements. It should be noted that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention.
In the engineering construction of subways, high-rise buildings, rooms at the bottom and the like, foundation pit excavation is needed, in order to ensure the engineering construction safety and provide data for the selection of a foundation pit supporting scheme, deformation monitoring is carried out on the foundation pit, and irreparable loss of surrounding buildings and the like is prevented, so that the observation of the horizontal displacement of the foundation pit side slope is particularly important. As shown in fig. 1 to 4, the system includes: horizontal displacement detecting system, monitoring information processing system and visual management system, horizontal displacement detecting system mainly used carry out displacement data acquisition according to the collection frequency that sets up, order such as cycle to with the data transmission who gathers to monitoring information processing system carries out information analysis and early warning judgement and then output alarm information by it, visual management system is used for carrying out visual display to the detected data, and user's accessible this system is looked over directly perceived to on-the-spot detection data and alarm information to automatic output causes the influence factor report of foundation ditch horizontal displacement.
In the system, the horizontal displacement detection system comprises a data acquisition unit and a parameter setting unit, wherein the data acquisition unit is used for acquiring initial readings of monitoring points and displacement change data information of each time, and the parameter setting unit is used for setting acquisition frequency, acquisition duration, a foundation pit displacement alarm value and an early warning judgment mode according to a user instruction. In the embodiment, the acquisition frequency is set to 5s, the acquisition duration is set to the whole day, the foundation pit displacement alarm value needs to be set according to the monitoring place, and the early warning discrimination mode adopts an annular ratio amplification comparison mode.
Specifically, the data acquisition unit comprises a monitoring management module and a data communication module, the monitoring management module is connected with the data communication module, and the monitoring management module comprises a data detection module and a monitoring point coding module; the data detection module comprises a total station detection module and an inclinometer detection module, the total station detection module is used for measuring coordinate data of each monitoring point in an engineering coordinate by adopting a total station fulcrum method and a GPS-RTK chart root control method according to a plurality of horizontal displacement datum points and supporting structure horizontal displacement monitoring points which are arranged, the monitoring points for deformation monitoring can be divided into control points and deformation points, the control points comprise datum points, the datum points are selected to be arranged at stable positions outside a deformation influence range and convenient for long-term storage, the horizontal displacement monitoring points, namely the deformation points are selected to be arranged at positions capable of reflecting deformation characteristics on a deformation body, the deformation points can be observed from adjacent datum points, and the total station fulcrum method can be used for monitoring the horizontal displacement by adopting a datum line method, a front intersection method, a polar method, a rear intersection method and the like. The inclinometer detection module comprises an automatic lifting detector and an inclinometer tube, wherein the automatic lifting detector is arranged in the inclinometer tube and comprises a probe 4 and an automatic lifting platform, the probe 4 comprises sensor elements such as a laser sensor and an angle sensor, and the automatic lifting detector is used for acquiring displacement data and the like of different depths at different moments according to acquisition control commands and sending the displacement data and the like to a monitoring information processing system. The monitoring point coding module is used for distributing unique identification codes and data storage addresses to each monitoring point; the data communication module is used for sending detection data to the monitoring information processing system, the data communication module comprises a Zigbee communication module and a radio frequency module, the radio frequency module comprises a plurality of active detection tags arranged at each monitoring point and a data read-write module, and the data read-write module acquires a secret code when reading information from the active detection tags and analyzes the secret code to obtain decrypted transmission data. In this embodiment, the data acquisition unit is disposed in a monitoring site, wherein a plurality of active detection tags are connected to the automatic lifting detector, and the data read-write module includes a read-write device, and can automatically read tag information within a certain range and update the acquired frequency and period.
As shown in fig. 6, the automatic lifting platform includes a base 1, a shock-proof device 2 and a lifting slide rail 3, a driving motor is arranged inside the base, the driving motor is used for driving a rotating wheel, and further the probe 4 is pulled by a cable wound on the rotating wheel, pulleys are arranged on two sides of the probe 4, the pulleys can slide along the lifting slide rail, the lifting slide rail is arranged on the inner side wall of the inclinometer pipe, the shock-proof device includes a vibration isolation rubber support, and the rubber support is arranged at the lower end of the base and can be used for preventing the vibration of the motor from influencing the detection precision.
The monitoring information processing system is used for receiving the monitoring information sent by the horizontal displacement detection system, analyzing the monitoring information and outputting early warning judgment information based on an analysis result, and comprises a data analysis unit and an early warning unit.
Specifically, the data analysis unit comprises a displacement information analysis module, an early warning module and an instruction control module; the displacement information analysis module judges the alarm state and grade based on the horizontal displacement sensing monitoring information acquired by the data acquisition unit, the displacement information analysis module comprises a displacement information cache module, a current early warning discrimination module and an amplification early warning discrimination module, the displacement information cache module structurally caches the displacement data of the foundation pit side slope detected by the data acquisition unit, the current early warning discrimination module compares the monitoring information of each current monitoring point with a set current maximum alarm threshold and a set current minimum alarm threshold to obtain the alarm result at the current moment, the amplification early warning discrimination module adopts a ring ratio amplification comparison mode and a mean value amplification comparison mode, and the ring ratio amplification comparison mode performs amplification comparison on the displacement data at the current moment and the depth displacement data corresponding to the previous detection period, and if the increase amplitude of the displacement data at the current moment compared with the displacement data in the previous detection period is greater than a preset value, carrying out automatic early warning, wherein the average value increase comparison mode carries out increase comparison on the displacement data at the current moment and the average value of the corresponding depth displacement data in the previous k-1 detection periods, and if the increase amplitude of the displacement data at the current moment compared with the average value of the corresponding depth displacement data in the previous k-1 detection periods is greater than the preset value, carrying out automatic early warning. The early warning module with the early warning unit links to each other, the early warning module be used for with the alarm state and the warning grade information of displacement information analysis module output send to the early warning unit carries out on-the-spot warning and remote alarm, the early warning unit includes on-the-spot warning terminal and remote alarm module, remote alarm module is used for sending alarm information for through wireless mode visual management system and user remove the end, and the user removes the end and includes intelligent mobile devices such as intelligent mobile phone, IPAD that can visit terminal management server. The instruction control module is used for sending updating and user control instructions to the horizontal displacement detection system in a wireless mode. Wherein, the on-site alarm terminal includes controlling means, distributed audio alert device and electric energy power module, distributed audio alert device with controlling means is connected, electric energy power module is used for doing controlling means with distributed audio alert device provides required voltage source, electric energy power module includes solar energy power module, lithium cell power module and USB module of charging, lithium cell power module includes lithium cell and battery management chip, USB module of charging includes the USB boost circuit board, lithium cell power module is used for carrying out stand-by power supply when solar energy power module voltage is not enough, USB module of charging is used for doing lithium cell power module provides external voltage. The control device comprises a PLC controller, the distributed voice alarm device is arranged in the warning area in a wired mode, and when alarm information exists, field workers are informed through the loudspeaker.
More specifically, each active detection tag comprises an RFID module and a parameter updating module, the RFID module sends displacement detection information of the inclinometer detection module to the data reading and writing module, the data reading and writing module sends received information to the data analysis unit at regular time through the Zigbee communication module and receives an instruction signal of the instruction control module, and the parameter updating module is used for receiving a data updating instruction sent by the data reading and writing module when a user updates data; the data read-write module sends the updating data transmitted by the instruction control module to each electronic tag needing updating data by transmitting radio frequency signals to realize the writing of the updating data; and after the writing action is completed, the data reading and writing module performs reading and writing verification on the updated and written electronic tag, if the verification fails, the updated data is rewritten, and if the verification succeeds, the data updating action is judged to be completed.
The visual management system is connected with the monitoring information processing system and used for visually displaying monitoring data and analyzing displacement factors, and the visual management system comprises a visual unit and a displacement analysis unit. The visual unit is connected with the early warning module, the visual unit comprises a data storage statistical module, a report inquiry module and a visual display module, the data storage statistical module collects and counts alarm information of each monitoring point to obtain a data storage library of each monitoring point, the report inquiry module is used for inquiring data, the visual display module is used for displaying the displacement data of the early warning information and different depths of each monitoring point through a large screen, and in the embodiment, the data of each monitoring point is visually displayed through line graphs of different colors, so that the variation fluctuation range is more visual.
As shown in fig. 5, the displacement influence factor analysis of the system adopts a fuzzy comprehensive evaluation method based on combined empowerment to perform evaluation analysis, the displacement analysis unit includes an index construction module, a model construction module and a report output module, and the displacement factor analysis process is as follows: a. the index construction module is used for constructing an evaluation index set U-U { U } according to the related index data influencing horizontal displacement1,u2,...,unN is the number of evaluation indexes; b. the model building module initializes the weight of the relevant index data in the index set U to obtain a weight initial value, and builds a hierarchical structure model based on the relevant index data in the index system and the weight initial value, wherein the hierarchical structure model comprises a target layer, a criterion layer and a factor layer, in the embodiment, the target layer is a foundation pit side slope horizontal displacement safety evaluation A, the criterion layer is a water level B1, a geology B2 and a terrain B3, and the factor layer comprises an underground water level C11, a hydrostatic pressure C12, a dynamic water pressure C13, a rainwater precipitation C14, a softened rock layer C21, a soil moisture content C22, a protruded terrain C31, a sunken terrain C32 and the like; c. then according to the scale principle of FAHP weighting method, using FAHP with scale of 0.1-0.9 to establish the fuzzy of relative importance degree of two indexes related to some criterionJudging a matrix, converting the fuzzy judgment matrix into a fuzzy complementary matrix, namely, marking the importance degree of index detection values of two-two displacement in different time periods, constructing the fuzzy complementary judgment matrix, traversing and unifying matrix data in the fuzzy complementary judgment matrix to obtain a fuzzy consistency matrix, and enabling the fuzzy consistency matrix to meet an additive consistency condition; d. calculating the maximum characteristic root of the fuzzy consistency matrix and normalizing the fuzzy consistency matrix to obtain a characteristic vector, wherein the characteristic vector is a single-row weight vector of each row, then calculating the total weight of each layer in an accumulated way, finally performing weight normalization to obtain the total weight of each element index, and according to the weight of each layer index
Calculating the comprehensive weight of each index of the factor layer relative to the target layer, wherein wrRepresenting the weight of the r-th criterion layer relative to the target,
the method comprises the steps of obtaining influence factors of displacement change conditions of time periods for the weight of the jth factor in the ith criterion layer relative to the ith criterion, wherein the larger the weight value is, the more biased the factor is, then forming displacement change condition reports of the time periods through a report output module, and controlling an intelligent printer to print through the report output module.
It should be noted that the described embodiments of the invention are only preferred ways of implementing the invention, and that all obvious modifications, which are within the scope of the invention, are all included in the present general inventive concept.
Claims (8)
1. The utility model provides a foundation ditch side slope horizontal displacement safety monitoring system which characterized in that includes: the system comprises a horizontal displacement detection system, a monitoring information processing system and a visual management system;
the horizontal displacement detection system comprises a data acquisition unit and a parameter setting unit, wherein the data acquisition unit is used for acquiring initial readings of monitoring points and data information of displacement change of each time, and the parameter setting unit is used for setting acquisition frequency, acquisition duration, a foundation pit displacement alarm value and an early warning judgment mode according to a user instruction;
the monitoring information processing system is used for receiving monitoring information sent by the horizontal displacement detection system, analyzing the monitoring information and outputting early warning judgment information based on an analysis result, and comprises a data analysis unit and an early warning unit;
the visual management system is connected with the monitoring information processing system and used for visually displaying monitoring data and analyzing displacement factors, and the visual management system comprises a visual unit and a displacement analysis unit.
2. The foundation pit slope horizontal displacement safety monitoring system of claim 1, wherein the data acquisition unit comprises a monitoring management module and a data communication module, and the monitoring management module comprises a data detection module and a monitoring point coding module;
the data detection module comprises a total station detection module and an inclinometer detection module, the total station detection module is used for determining coordinate data of each monitoring point in an engineering coordinate by adopting a total station fulcrum method and a GPS-RTK (global position system-real time kinematic) chart root control method according to a plurality of laid horizontal displacement datum points and supporting structure horizontal displacement monitoring points, the inclinometer detection module comprises an automatic lifting detector and an inclinometer pipe, the automatic lifting detector is arranged in the inclinometer pipe and comprises a probe and an automatic lifting platform, the probe comprises a laser sensor and an angle sensor, and the monitoring point coding module is used for distributing unique identification codes and data storage addresses to the monitoring points;
the data communication module is used for sending detection data to the monitoring information processing system, the data communication module comprises a Zigbee communication module and a radio frequency module, the radio frequency module comprises a plurality of active detection tags arranged at each monitoring point and a data read-write module, and the data read-write module acquires a secret code when reading information from the active detection tags and analyzes the secret code to obtain decrypted transmission data.
3. The system for monitoring the safety of the horizontal displacement of the side slope of the foundation pit as claimed in claim 2, wherein the automatic lifting platform comprises a base, a shock-proof device and a lifting slide rail, a driving motor is arranged in the base and used for driving a rotating wheel, so that the probe is pulled by a cable wound on the rotating wheel, pulleys are arranged on two sides of the probe and can slide along the lifting slide rail, the lifting slide rail is arranged on the inner side wall of the inclinometer pipe, the shock-proof device comprises a vibration-proof rubber support, and the rubber support is arranged at the lower end of the base.
4. The foundation pit slope horizontal displacement safety monitoring system of claim 3, wherein the data analysis unit comprises a displacement information analysis module, an early warning module and an instruction control module;
the displacement information analysis module judges the alarm state and grade based on the horizontal displacement sensing monitoring information acquired by the data acquisition unit, the displacement information analysis module comprises a displacement information cache module, a current early warning discrimination module and an amplification early warning discrimination module, the displacement information cache module structurally caches the displacement data of the foundation pit side slope detected by the data acquisition unit, the current early warning discrimination module compares the monitoring information of each current monitoring point with a set current maximum alarm threshold and a set current minimum alarm threshold to obtain the alarm result at the current moment, the amplification early warning discrimination module adopts a ring ratio amplification comparison mode and a mean value amplification comparison mode, and the ring ratio amplification comparison mode performs amplification comparison on the displacement data at the current moment and the depth displacement data corresponding to the previous detection period, if the increase amplitude of the comparison between the displacement data at the current moment and the displacement data in the previous detection period is greater than a preset value, carrying out automatic early warning, wherein the average value increase comparison mode carries out increase comparison between the displacement data at the current moment and the average value of the corresponding depth displacement data in the previous k-1 detection periods, and if the increase amplitude of the comparison between the displacement data at the current moment and the average value of the corresponding depth displacement data in the previous k-1 detection periods is greater than the preset value, carrying out automatic early warning;
the early warning module is connected with the early warning unit and used for sending the warning state and warning grade information output by the displacement information analysis module to the early warning unit for on-site warning and remote warning, the early warning unit comprises an on-site warning terminal and a remote warning module, and the remote warning module is used for sending warning information to the visual management system and the user mobile terminal in a wireless mode;
the instruction control module is used for sending updating and user control instructions to the horizontal displacement detection system in a wireless mode.
5. The foundation pit slope horizontal displacement safety monitoring system of claim 4, wherein each active detection tag comprises an RFID module and a parameter updating module, the RFID module sends displacement detection information of the inclinometer detection module to the data reading and writing module, the data reading and writing module sends received information to the data analysis unit at regular time through the Zigbee communication module and receives an instruction signal of the instruction control module, and the parameter updating module is used for receiving a data updating instruction sent by the data reading and writing module when a user updates data; the data read-write module sends the updating data transmitted by the instruction control module to each electronic tag needing updating data by transmitting radio frequency signals to realize the writing of the updating data; and after the writing action is completed, the data reading and writing module performs reading and writing verification on the updated and written electronic tag, if the verification fails, the updated data is rewritten, and if the verification succeeds, the data updating action is judged to be completed.
6. The foundation pit slope horizontal displacement safety monitoring system of claim 4, wherein the on-site alarm terminal comprises a control device, a distributed voice alarm device and an electric energy power supply module, the distributed voice alarm device is connected with the control device, the electric energy power supply module is used for providing a required voltage source for the control device and the distributed voice alarm device, the electric energy power supply module comprises a solar power supply module, a lithium battery power supply module and a USB charging module, the lithium battery power supply module comprises a lithium battery and a battery management chip, the USB charging module comprises a USB boost circuit board, the lithium battery power supply module is used for performing standby power supply when the voltage of the solar power supply module is insufficient, and the USB charging module is used for providing external voltage for the lithium battery power supply module.
7. The foundation pit slope horizontal displacement safety monitoring system of claim 6, wherein the visualization unit is connected with the early warning module, the visualization unit comprises a data storage statistics module, a report query module and a visualization display module, the data storage statistics module collects and counts alarm information of each monitoring point to obtain a data storage library of each monitoring point, the report query module is used for data query, and the visualization display module is used for displaying the early warning information and displacement data of different depths of each monitoring point through a large screen.
8. The system according to claim 1, wherein the displacement analysis unit comprises an index construction module, a model construction module and a report output module, and the index construction module is configured to construct an evaluation index set U ═ U { U } according to relevant index data affecting horizontal displacement1,u2,...,unN is the number of evaluation indexes; initializing the weight of the related index data in the index set U by the model establishing module to obtain a weight initial value, and establishing a hierarchical structure model based on the related index data in the index system and the weight initial value, wherein the hierarchical structure model comprises a target layer, a criterion layer and a factor layer; according to the scale principle of the FAHP weighting method, the importance degree of the index detection values of two-two displacement in different time periods is marked, and fuzzy interaction is constructedA complementary judgment matrix, which is used for traversing and unifying matrix data in the fuzzy complementary judgment matrix to obtain a fuzzy consistency matrix and enabling the fuzzy consistency matrix to meet an additive consistency condition; calculating the maximum characteristic root of the fuzzy consistency matrix and normalizing the fuzzy consistency matrix to obtain a characteristic vector, wherein the characteristic vector is a single-row weight vector of each row, then calculating the total weight of each layer in an accumulated manner, and finally performing weight normalization to obtain the total weight of each element index; according to the weight of each layer index, according to
Calculating the comprehensive weight of each index of the factor layer relative to the target layer, wherein wrRepresenting the weight of the r-th criterion layer relative to the target,
and obtaining the influence factors of the displacement change condition of each time period for the weight of the jth factor in the ith criterion layer relative to the ith criterion, and then forming a displacement change condition report of each time period through the report output module, wherein the report output module controls the intelligent printer to print.
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