CN111366101A - Real-time monitoring and early warning method for deep foundation pit based on three-dimensional laser scanning technology - Google Patents
Real-time monitoring and early warning method for deep foundation pit based on three-dimensional laser scanning technology Download PDFInfo
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- CN111366101A CN111366101A CN202010308509.8A CN202010308509A CN111366101A CN 111366101 A CN111366101 A CN 111366101A CN 202010308509 A CN202010308509 A CN 202010308509A CN 111366101 A CN111366101 A CN 111366101A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
Abstract
The invention provides a real-time monitoring and early warning method for a deep foundation pit based on a three-dimensional laser scanning technology, which comprises the following steps: s1, mounting a three-dimensional laser scanner at the position meeting the monitoring requirements of each monitoring point and the foundation pit surface; s2, using the monitoring point data and the point cloud model data of the first scanning as initial data; s3, in the monitoring process of the three-dimensional laser scanner, firstly, aiming at the rear view point to check the reference position of the instrument during each scanning; s4, displaying the monitoring data and the deformation trend in a numerical list and dynamic curve mode; s5, generating a point cloud model deformation analysis graph and maximum deformation data in real time; s6, generating data curves and scanning images of all monitoring point clouds and the point clouds of the foundation pit surface, selecting the maximum deformation value by the system, and highlighting the maximum deformation value and the occurrence part thereof; and S7, when the monitoring data exceeds the early warning value, the control terminal controls the on-site broadcast to send broadcast early warning. The invention integrally realizes the monitoring of the deep foundation pit in high frequency, large range and all weather.
Description
Technical Field
The invention relates to the technical field of deep foundation pit monitoring, in particular to a real-time monitoring and early warning method for a deep foundation pit based on a three-dimensional laser scanning technology.
Background
Traditional foundation pit deformation monitoring is manual monitoring, and a total station is adopted to carry out displacement monitoring on a fixed position pre-buried in the top surface of the foundation pit, so that the deformation condition of the foundation pit is determined. However, in the conventional method, data needs to be read and recorded manually, and contrastive analysis is performed on the previous data, so that all-weather uninterrupted monitoring and implement contrastive analysis of the data cannot be achieved, and in the patent application No. CN201510160043.0 and the patent name "deep foundation pit health monitoring management system and management method thereof", a method for modeling a deep foundation pit by using a BIM system is disclosed, so that AR implementation of the deep foundation pit data is realized, and further health grading evaluation is performed on the deep foundation pit, but dynamic monitoring cannot be performed on the whole foundation pit surface, and the manual monitoring precision error is large during night construction.
Disclosure of Invention
The invention provides a real-time monitoring and early warning method for a deep foundation pit based on a three-dimensional laser scanning technology, which is suitable for being used in continuous and uninterrupted construction process environments such as large-volume concrete construction of a basic raft and the like, and aims to solve the technical problems that the whole foundation pit surface cannot be dynamically monitored in the monitoring of the deep foundation pit at present and the error of manual monitoring precision is large in night construction.
In order to solve the above-mentioned purpose, the technical scheme of the invention is realized as follows:
a real-time monitoring and early warning method for a deep foundation pit based on a three-dimensional laser scanning technology comprises the following steps:
s1, dividing a monitoring area for a construction area in a foundation pit according to actual conditions on site, determining monitoring points and a monitoring foundation pit surface in the monitoring area, installing observation prisms in the monitoring area, determining reference points outside a construction site, installing rear view point prisms at the reference point positions, installing three-dimensional laser scanners at positions meeting monitoring requirements of the monitoring points and the foundation pit surface, and transmitting scanning data of the three-dimensional laser scanners to a control terminal in real time;
s2, after the installation is completed in the step S1, the control terminal controls the three-dimensional laser scanner to start, initial scanning is conducted on each monitoring point and the foundation pit surface in the monitoring area in the foundation pit, after the initial scanning is completed, the three-dimensional scanner is aligned to the rear view point, positioning data is checked, then second comprehensive scanning is conducted, the second scanning data is compared with the first scanning monitoring point and point cloud model data formed on the foundation pit surface, when the comparison result shows that the data are not abnormal, the first scanning monitoring point data and the point cloud model data serve as initial data, and serve as the reference of each data comparison; meanwhile, setting a safety early warning value according to the initial data value;
s3, in the monitoring process of the three-dimensional laser scanner, firstly, aiming at the viewpoint and checking the reference position of the instrument during each scanning, then, aiming at each monitoring point one by using the three-dimensional laser scanner, and collecting monitoring point data; scanning the surfaces of the foundation pits one by one, collecting cloud data of the surface points of the foundation pits, and after one-time scanning is completed, performing next scanning operation on the viewpoint after the three-dimensional scanner is aligned;
s4, according to the step S3, when the three-dimensional laser scanner collects data of each monitoring point, the three-dimensional laser scanner is used for aiming at the observation prisms one by one, the three-dimensional laser scanner transmits the data to the control terminal in real time, the control terminal finishes reading, comparing and checking the left and right aiming data of each monitoring point, generates longitudinal, transverse and elevation data of each monitoring point in real time, generates displacement difference of each point data compared with the previous scanning data and accumulated displacement difference compared with the initial data of the foundation pit according to the longitudinal, transverse and elevation data, and displays the monitoring data and the deformation trend in a numerical value list and dynamic curve mode;
s5, according to the step S3, the three-dimensional laser scanner scans the preset foundation pit surfaces one by one, the scanning data are transmitted to the control terminal in real time to generate point cloud data, a point cloud model produced by scanning the foundation pit surfaces at each time is automatically compared with a point cloud model scanned at the previous time and initial data of the foundation pit, a point cloud model deformation analysis graph and maximum deformation data are generated in real time, and monitoring data and deformation trends are displayed in a numerical list and dynamic curve mode;
s6, according to the steps S4-S5, after the control terminal obtains deformation monitoring data of each monitoring point and each base pit surface point cloud, generating data curves and scanning images of all monitoring point clouds and base pit surface point clouds, selecting a maximum deformation value by the system, and highlighting the maximum deformation value and a generation part thereof;
and S7, after the foundation pit scanning is completed and an analysis result and a monitoring report are formed each time, comparing the monitoring data with the early warning value, when the monitoring data exceeds the early warning value, controlling the on-site broadcasting and sending broadcast early warning by the control terminal, and emergently evacuating on-site constructors and vehicles, wherein the on-site safety manager checks the situation according to the warning information and on-site observation.
Preferably, in step S7, when the daily deformation value of the monitoring point and the foundation pit surface is greater than 5mm or the accumulated deformation of the monitoring point and the foundation pit surface is greater than 20mm, the control terminal controls the on-site broadcast to send the broadcast warning.
Preferably, the monitoring point in the step S1 is arranged on the top of the foundation pit slope; the observation prism is arranged along the periphery of the foundation pit, the middle part of the periphery of the foundation pit and the external corner.
Preferably, the arrangement distance of the monitoring points is less than or equal to 20m, and the number of the monitoring points on each side of the foundation pit is at least three.
Preferably, in step S1, a communication cable or a wireless bridge device is installed for data transmission between the three-dimensional laser scanner and the control terminal.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the original data of the foundation pit is collected and stored only before the foundation pit monitoring is started, and the monitoring range and the data precision are set according to the site and construction requirements; compared with the traditional artificial foundation pit monitoring process, the method is more convenient, does not need to shift on duty and operate manually by surveying and mapping professionals at any time, can improve the monitoring data precision to the maximum extent, and avoids manual operation errors;
2. in the invention, one-time scanning time of 3-4 foundation pit surfaces and monitoring point positions of the top of the foundation pit is about 20-30 minutes; if the monitoring point data of the top of the foundation pit is monitored independently, the monitoring speed of each point can reach 5 seconds, the frequency and the working efficiency of foundation pit monitoring are greatly improved, and the safety of the foundation pit is monitored at high frequency, in a large range and in all weather to the maximum extent;
3. according to the invention, the foundation pit is scanned by the three-dimensional laser scanner, and the scanning data transmission, data analysis, deformation trend curve generation, foundation pit surface point cloud model comparison, monitoring report output and early warning information release of the foundation pit can be realized through real-time transmission and real-time release, so that the hidden danger can be found, the hidden danger point can be determined, the hidden danger reason can be analyzed, the safety early warning information can be released at the first time, and the life safety of field construction workers and the smooth construction of engineering can be ensured completely.
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 or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is an overall work flow diagram of the present invention.
FIG. 2 is a schematic view of the distribution of observation prisms in the present invention.
FIG. 3 is a graph of accumulated vector displacement at each point of the top of the pit according to the present invention.
FIG. 4 is a diagram of accumulated deviations of displacement of each point at the top of the foundation pit in different directions according to the present invention.
FIG. 5 is a line drawing illustrating cumulative elevation displacement changes at each point on the top of the foundation pit according to the present invention.
FIG. 6 is a cloud of the monitored and scanned portion of the foundation pit surface in accordance with the present invention.
Detailed Description
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 obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
As shown in fig. 1, a real-time monitoring and early warning method for a deep foundation pit based on a three-dimensional laser scanning technology includes the following steps:
s1, dividing a monitoring area, a monitoring section or a monitoring surface for a construction area in a foundation pit according to actual conditions on site, determining monitoring points and a monitoring foundation pit surface in the monitoring area, wherein the monitoring points are arranged on the top of a slope of the foundation pit, the arrangement distance of the monitoring points is less than or equal to 20m, the number of each side of the foundation pit is at least three, according to the construction site and the construction deployment conditions, important monitoring near the positions of stacking concentration and mechanical equipment concentration is dealt with, and monitoring points in the corresponding sections are distributed and densely distributed;
as shown in fig. 2, an observation prism is installed in a monitoring area, the mirror surface of the observation prism is right opposite to a three-dimensional laser scanner, so that the observation prism cannot be shielded, and good monitoring conditions are guaranteed;
the three-dimensional laser scanner is arranged at a position meeting the monitoring requirements of each monitoring point and the surface of the foundation pit, the scanning data of the three-dimensional laser scanner is transmitted to the control terminal in real time, a communication cable or wireless network bridge equipment is erected for transmitting the data between the three-dimensional laser scanner and the control terminal, the control terminal is a mobile phone or a computer, a come card GeoMoS monitoring system is configured on the control terminal for processing the data sent by the three-dimensional laser scanning, and the simultaneous monitoring of the horizontal displacement and the vertical displacement of a single measuring point at the top of the foundation pit can be realized through a three-dimensional laser scanning technology; in addition, a point cloud model technology is formed through scanning, so that all points on the side slope free face of the foundation pit and on the side slope supporting structure are comprehensively monitored, all-weather 24-hour uninterrupted monitoring is realized, and the safety monitoring of the foundation pit in the underground construction stage is guaranteed; the method adopts high-performance total station scanner equipment, combines a specially developed foundation pit real-time safety monitoring system and a point cloud model real-time comparison system, can uninterruptedly complete data acquisition, transmission, analysis and early warning in real time, eliminates process time difference, simultaneously achieves monitoring precision of 0.5mm, and greatly improves safety monitoring efficiency and reaction speed; the automatic point location observation of the measuring robot and the point cloud collection of laser scanning are organically integrated through the total station scanner, the real-time dynamic position point sub-millimeter displacement data and the foundation pit surface chromatographic analysis data are comprehensively processed by combining the foundation pit implementation safety monitoring system, and the deep foundation pit safety monitoring and driving protection navigation in the foundation construction stage is more accurate, real-time and reliable, and the monitoring system is also the first application of the same type of domestic building engineering.
S2, after the installation is completed in the step S1, the control terminal controls the three-dimensional laser scanner to start, initial scanning is conducted on each monitoring point and the foundation pit surface in the monitoring area in the foundation pit, after the initial scanning is completed, the three-dimensional scanner is aligned to the rear view point, positioning data is checked, then second comprehensive scanning is conducted, the second scanning data is compared with the first scanning monitoring point and point cloud model data formed on the foundation pit surface, when the comparison result shows that the data are not abnormal, the first scanning monitoring point data and the point cloud model data serve as initial data, and serve as the reference of each data comparison; meanwhile, setting a safety early warning value according to the initial data value;
s3, in the process of monitoring the three-dimensional laser scanner, before each monitoring scanning cycle begins, the sighting work of the rear view point must be finished firstly, the relative independence and accuracy of each scanning data are ensured, the cumulative influence of scanning data errors in continuous long-time monitoring work is avoided, and the position of the instrument is ensured to be relatively stable in the whole monitoring process and is not disturbed by construction disturbance. Meanwhile, before each scanning program is started, after a rear viewpoint is looked at, the system automatically identifies the position data of the instrument and takes the position data as a data reference point of single scanning so as to ensure that the data scanned each time is not influenced by the position change or shaking of the instrument and the like; then, the three-dimensional laser scanner is used for aiming at each monitoring point one by one, and monitoring point data are collected; scanning the surfaces of the foundation pits one by one, collecting cloud data of the surface points of the foundation pits, and after one-time scanning is completed, performing next scanning operation on the viewpoint after the three-dimensional scanner is aligned;
s4, according to the step S3, when the three-dimensional laser scanner collects data of each monitoring point, the three-dimensional laser scanner is used for aiming at the observation prisms one by one, the data are transmitted to the control terminal in real time by the three-dimensional laser scanner, the control terminal finishes the respective reading and comparison and checking of the left and right aiming data of each monitoring point, generates longitudinal, transverse and elevation data of each monitoring point in real time, and generates displacement difference of each point data compared with the previous scanning data and accumulated displacement difference compared with the initial data of the foundation pit according to the longitudinal, transverse and elevation data so as to reflect the single deformation difference and accumulated deformation difference of each monitoring point in each scanning, and the monitoring data and the deformation trend are displayed in a mode of a numerical value list and a dynamic curve;
as shown in fig. 6, S5, according to step S3, the three-dimensional laser scanner scans the preset foundation pit surfaces one by one, the scanned data is transmitted to the control terminal in real time to generate point cloud data, the point cloud model generated by scanning the foundation pit surface each time is automatically compared with the point cloud model scanned last time and the initial data of the foundation pit, a point cloud model deformation analysis diagram and maximum deformation data are generated in real time, and meanwhile, specific point location data and deformation data can be viewed from each point location on the foundation pit surface, and the monitoring data and deformation trend are displayed in a manner of a numerical value list and a dynamic curve; the time of each foundation pit monitoring scanning process is 20-30 minutes, complete scanning and data collection are completed for each monitoring point on the top of the foundation pit and each foundation pit surface once, and the completion time of one-time scanning is slightly different according to the difference between the number of monitoring point positions and the scanning precision of the foundation pit surface which are set for monitoring the foundation pit;
and comparing each group of monitoring point data and foundation pit surface point cloud model data with the previous scanning data and the foundation pit initial data in real time, and generating each group of monitoring points and each foundation pit surface point cloud displacement value so as to obtain real-time deformation and accumulated deformation.
As shown in fig. 3 to 5, S6, according to steps S4 to S5, the control terminal generates data curves and scanned images of all monitoring points and the point clouds of the foundation pit surface after obtaining the deformation monitoring data of each monitoring point and the point cloud of each foundation pit surface, and the system selects the maximum deformation value and highlights the maximum deformation value and the occurrence part thereof; according to the complete data obtained by each scanning and the actual situation of field construction, whether construction disturbance deformation occurs on each monitoring point position and foundation pit surface and the reason of the deformation can be analyzed, and a monitoring report of each foundation pit safety monitoring scanning is formed to guide field safety coordination and safety evacuation management.
S7, after the foundation pit scanning is completed and an analysis result and a monitoring report are formed each time, safety monitoring personnel should perform management coordination measures such as peripheral field management strengthening, vehicle reduction properly, vehicle and foundation pit safety distance increasing, emergency evacuation personnel and the like on a region with larger foundation pit deformation according to monitoring data and field condition verification in time; by comparing the monitoring data with the early warning value, when the monitoring data exceeds the early warning value, the control terminal controls the site to broadcast and send broadcast early warning, namely when the deformation values of the monitoring point position and the foundation pit surface are larger than 5mm every day or the accumulated deformation of the monitoring point position and the foundation pit surface is larger than 20mm, the control terminal controls the site to broadcast and send broadcast early warning to emergently evacuate site constructors and vehicles, and site safety management personnel release and adjust safety instructions of different levels such as construction deployment, construction machinery transfer, personnel temporary evacuation or evacuation, and emergency clearing according to the warning information and site observation and checking conditions and instruct the site personnel to emergently evacuate and evacuate according to a preset scheme. Monitoring personnel regularly report the monitoring result and the deformation trend, and reasonably coordinate the site construction deployment so as to achieve the purpose of preventing the situation from being mild and gradual. Continuously monitoring the foundation pit condition in a stable state within 1 day after the construction is finished and various construction machines and materials are removed from the field, finishing the monitoring, collating process data and issuing a monitoring report; according to the invention, advanced total station scanner equipment is adopted, automatic point location observation of a measuring robot and laser scanning point cloud collection are organically combined through the total station scanner, real-time dynamic position point sub-millimeter displacement data and foundation pit surface chromatographic analysis data are comprehensively processed, and the obtained foundation pit monitoring data is more accurate, real-time and reliable.
On the basis of realizing the real-time monitoring data transmission of the foundation pit, the real-time safety monitoring system of the foundation pit and the point cloud model real-time comparison system analyze and compare all data, and display the monitoring data and the deformation trend in real time in a numerical list and dynamic curve mode; by setting the deformation early warning value, the alarm is given in real time when the deformation early warning value is exceeded, and the value and the occurrence position of the alarm deformation value are displayed, so that safety instructions of different levels, such as adjusting construction deployment, transferring construction machinery, temporarily evacuating or evacuating personnel, and emergently clearing, can be issued on site at any time according to the change condition of monitoring data or early warning information. The construction method achieves the purpose of preventing the accident of the deep foundation pit from happening in a gentle and gradual manner.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (5)
1. A real-time monitoring and early warning method for a deep foundation pit based on a three-dimensional laser scanning technology is characterized by comprising the following steps:
s1, dividing a monitoring area for a construction area in a foundation pit according to actual conditions on site, determining monitoring points and a monitoring foundation pit surface in the monitoring area, installing observation prisms in the monitoring area, determining reference points outside a construction site, installing rear view point prisms at the reference point positions, installing three-dimensional laser scanners at positions meeting monitoring requirements of the monitoring points and the foundation pit surface, and transmitting scanning data of the three-dimensional laser scanners to a control terminal in real time;
s2, after the installation is completed in the step S1, the control terminal controls the three-dimensional laser scanner to start, initial scanning is conducted on each monitoring point and the foundation pit surface in the monitoring area in the foundation pit, after the initial scanning is completed, the three-dimensional scanner is aligned to the rear view point, positioning data is checked, then second comprehensive scanning is conducted, the second scanning data is compared with the first scanning monitoring point and point cloud model data formed on the foundation pit surface, when the comparison result shows that the data are not abnormal, the first scanning monitoring point data and the point cloud model data serve as initial data, and serve as the reference of each data comparison; meanwhile, setting a safety early warning value according to the initial data value;
s3, in the monitoring process of the three-dimensional laser scanner, firstly, aiming at the viewpoint and checking the reference position of the instrument during each scanning, then, aiming at each monitoring point one by using the three-dimensional laser scanner, and collecting monitoring point data; scanning the surfaces of the foundation pits one by one, collecting cloud data of the surface points of the foundation pits, and after one-time scanning is completed, performing next scanning operation on the viewpoint after the three-dimensional scanner is aligned;
s4, according to the step S3, when the three-dimensional laser scanner collects data of each monitoring point, the three-dimensional laser scanner is used for aiming at the observation prisms one by one, the three-dimensional laser scanner transmits the data to the control terminal in real time, the control terminal finishes reading, comparing and checking the left and right aiming data of each monitoring point, generates longitudinal, transverse and elevation data of each monitoring point in real time, generates displacement difference of each point data compared with the previous scanning data and accumulated displacement difference compared with the initial data of the foundation pit according to the longitudinal, transverse and elevation data, and displays the monitoring data and the deformation trend in a numerical value list and dynamic curve mode;
s5, according to the step S3, the three-dimensional laser scanner scans the preset foundation pit surfaces one by one, the scanning data are transmitted to the control terminal in real time to generate point cloud data, a point cloud model produced by scanning the foundation pit surfaces at each time is automatically compared with a point cloud model scanned at the previous time and initial data of the foundation pit, a point cloud model deformation analysis graph and maximum deformation data are generated in real time, and monitoring data and deformation trends are displayed in a numerical list and dynamic curve mode;
s6, according to the steps S4-S5, after the control terminal obtains deformation monitoring data of each monitoring point and each base pit surface point cloud, generating data curves and scanning images of all monitoring point clouds and base pit surface point clouds, selecting a maximum deformation value by the system, and highlighting the maximum deformation value and a generation part thereof;
and S7, after the foundation pit scanning is completed and an analysis result and a monitoring report are formed each time, comparing the monitoring data with the early warning value, when the monitoring data exceeds the early warning value, controlling the on-site broadcasting and sending broadcast early warning by the control terminal, and emergently evacuating on-site constructors and vehicles, wherein the on-site safety manager checks the situation according to the warning information and on-site observation.
2. The real-time monitoring and early warning method for the deep foundation pit based on the three-dimensional laser scanning technology as claimed in claim 1, wherein in step S7, when the daily deformation values of the monitoring point and the foundation pit surface are greater than 5mm or the accumulated deformation of the monitoring point and the foundation pit surface is greater than 20mm, the control terminal controls the on-site broadcast to send the broadcast early warning.
3. The real-time monitoring and early warning method for the deep foundation pit based on the three-dimensional laser scanning technology as claimed in claim 1, wherein the monitoring point in the step S1 is arranged on the top of the side slope of the foundation pit; the observation prism is arranged along the periphery of the foundation pit, the middle part of the periphery of the foundation pit and the external corner.
4. The real-time monitoring and early warning method for the deep foundation pit based on the three-dimensional laser scanning technology as claimed in claim 3, wherein the arrangement distance of the monitoring points is less than or equal to 20m and the number of each side of the foundation pit is at least three.
5. The real-time monitoring and early warning method for the deep foundation pit based on the three-dimensional laser scanning technology as claimed in claim 1, wherein in step S1, a communication cable or a wireless bridge device is erected for data transmission between the three-dimensional laser scanner and the control terminal.
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| CN112832303A (en) * | 2020-12-31 | 2021-05-25 | 山东明嘉勘察测绘有限公司 | Vertical displacement monitoring system in top of slope based on construction of piping lane foundation ditch |
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| CN113404029A (en) * | 2021-07-12 | 2021-09-17 | 苏州思萃融合基建技术研究所有限公司 | Construction site deep foundation pit intelligent monitoring and early warning system based on digital twin technology |
| CN114485456A (en) * | 2021-12-17 | 2022-05-13 | 卜庆斌 | Depth measuring device for foundation pit monitoring and measuring method thereof |
| CN114485456B (en) * | 2021-12-17 | 2024-03-15 | 永信和瑞工程咨询有限公司 | Depth measuring device for foundation pit monitoring and measuring method thereof |
| CN114754252A (en) * | 2022-04-15 | 2022-07-15 | 中地华建工程勘察设计有限公司 | Networking real-time monitoring's automatic deformation monitoring facilities of subway foundation ditch |
| CN114754252B (en) * | 2022-04-15 | 2023-10-13 | 中地华建工程勘察设计有限公司 | Automatic deformation monitoring equipment for subway foundation pit with real-time monitoring function through networking |
| CN115142484A (en) * | 2022-07-27 | 2022-10-04 | 中国十七冶集团有限公司 | Integrated intelligent monitoring system and monitoring method for foundation pit slope top displacement and deep horizontal displacement |
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