A BIM-based construction process foundation pit deformation monitoring and early warning method and system

Abstract

The embodiment of the present invention relates to the technical field of foundation pit deformation monitoring, and specifically discloses a method and system for monitoring and warning of foundation pit deformation during construction based on BIM. The embodiment of the present invention obtains the foundation pit BIM data of the target monitoring foundation pit and selects a target monitoring drone; constructs a monitoring space coordinate system, selects deformation monitoring points; dynamically plans the deformation monitoring cycle; periodically performs deformation monitoring shooting to obtain foundation pit shooting data; performs feature recognition and change analysis on the foundation pit shooting data, and performs foundation pit deformation warning when there is a risk of foundation pit deformation. It is possible to construct a monitoring space coordinate system, select deformation monitoring points, dynamically plan the deformation monitoring cycle, periodically control the target monitoring drone to perform deformation monitoring shooting, and perform foundation pit deformation warning when there is a risk of foundation pit deformation. The monitoring and warning arrangement is simple, and does not require a lot of technical personnel to process and analyze, effectively reducing time and labor costs, and greatly reducing maintenance costs.

Description

Technical Field

[0001] The present invention belongs to the technical field of foundation pit deformation monitoring, and in particular relates to a BIM-based foundation pit deformation monitoring and early warning method and system during construction. Background Art

[0002] Foundation pit deformation monitoring is the process of real-time or regular measurement and analysis of the displacement, settlement, inclination and other deformation conditions of the foundation pit and its surrounding strata during engineering activities such as earth excavation and underground structure construction, in order to ensure the safety of the surrounding environment and the stability of the engineering structure. It specifically includes displacement monitoring, settlement monitoring and inclination monitoring.

[0003] In the existing technology, in order to improve the accuracy of foundation pit deformation monitoring, fiber optic sensing technology is usually used for foundation pit deformation monitoring. Although the monitoring accuracy and automation level can be effectively improved, the layout of fiber optic sensing is relatively cumbersome and requires a lot of technical personnel to process and analyze, which increases time and labor costs, and the maintenance cost is also high. Summary of the Invention

[0004] The purpose of the embodiments of the present invention is to provide a BIM-based construction process foundation pit deformation monitoring and early warning method and system, aiming to solve the problems raised in the background technology.

[0005] To achieve the above objectives, the embodiments of the present invention provide the following technical solutions:

[0006] A BIM-based construction process foundation pit deformation monitoring and early warning method, the method specifically comprising the following steps:

[0007] Determine the target monitoring pit, obtain the pit BIM data of the target monitoring pit, and select the target monitoring drone;

[0008] Obtaining the monitoring takeoff position of the target monitoring drone, constructing a monitoring space coordinate system, analyzing the foundation pit BIM data, and selecting deformation monitoring points in the monitoring space coordinate system;

[0009] Acquiring construction planning information and location weather information of the target monitoring foundation pit, analyzing the construction planning information and the location weather information, and dynamically planning a deformation monitoring cycle;

[0010] According to the deformation monitoring cycle, periodically controlling the target monitoring drone to perform deformation monitoring photography of the target monitoring foundation pit at the deformation monitoring point to obtain foundation pit photography data;

[0011] Feature recognition and change analysis are performed on the foundation pit photographed data to determine whether there is a risk of foundation pit deformation, and when there is a risk of foundation pit deformation, a foundation pit deformation warning is issued.

[0012] As a further limitation of the technical solution of the embodiment of the present invention, the steps of determining a target monitoring pit, obtaining the BIM data of the target monitoring pit, and selecting a target monitoring drone specifically include the following steps:

[0013] Determine the target monitoring pit;

[0014] Obtaining target basic information of the target monitoring foundation pit;

[0015] Matching the foundation pit BIM data of the target monitoring foundation pit according to the target basic information;

[0016] Select the target monitoring drone.

[0017] As a further limitation of the technical solution of the embodiment of the present invention, the steps of obtaining the monitoring takeoff position of the target monitoring drone, constructing a monitoring space coordinate system, and analyzing the foundation pit BIM data, and selecting deformation monitoring points in the monitoring space coordinate system specifically include the following steps:

[0018] Obtaining the monitoring takeoff position of the target monitoring drone;

[0019] Taking the monitoring takeoff position as the spatial coordinate origin, constructing a monitoring space coordinate system;

[0020] Constructing a monitoring space environment based on the monitoring space coordinate system;

[0021] In the monitoring space environment, the foundation pit BIM data is imported, and monitoring point analysis is performed to select deformation monitoring points.

[0022] As a further limitation of the technical solution of the embodiment of the present invention, obtaining the construction planning information and the meteorological information of the target monitoring pit, analyzing the construction planning information and the meteorological information of the location, and dynamically planning the deformation monitoring cycle specifically include the following steps:

[0023] Obtaining construction planning information of the target monitoring foundation pit;

[0024] Extracting the target foundation pit position of the target monitoring foundation pit from the target basic information;

[0025] According to the target foundation pit location, obtaining location meteorological information;

[0026] The construction planning information and the location meteorological information are analyzed to dynamically plan a deformation monitoring cycle.

[0027] As a further limitation of the technical solution of the embodiment of the present invention, according to the deformation monitoring period, periodically controlling the target monitoring drone to perform deformation monitoring photography of the target monitoring foundation pit at the deformation monitoring point, and obtaining the foundation pit photography data specifically includes the following steps:

[0028] periodically generating deformation monitoring instructions according to the deformation monitoring cycle;

[0029] Sending the deformation monitoring instruction to the target monitoring UAV;

[0030] The target monitoring UAV is controlled to perform deformation monitoring photography of the target monitoring foundation pit at the deformation monitoring point to obtain foundation pit photography data.

[0031] As a further limitation of the technical solution of the embodiment of the present invention, the performing of feature recognition and change analysis on the photographed foundation pit data to determine whether there is a risk of foundation pit deformation, and performing foundation pit deformation warning when there is a risk of foundation pit deformation specifically includes the following steps:

[0032] Performing feature recognition on the foundation pit photographed data to obtain foundation pit feature data;

[0033] Import historical feature data;

[0034] performing a change analysis on the foundation pit characteristic data based on the historical characteristic data to determine whether there is a risk of foundation pit deformation;

[0035] When there is a risk of foundation pit deformation, a deformation warning signal is generated;

[0036] According to the deformation warning signal, a foundation pit deformation warning is carried out.

[0037] A BIM-based foundation pit deformation monitoring and early warning system for construction processes, comprising a BIM data acquisition unit, a monitoring point selection unit, a periodic dynamic planning unit, a deformation monitoring and shooting unit, and a foundation pit deformation early warning unit, wherein:

[0038] A BIM data acquisition unit is used to determine a target monitoring pit, acquire the BIM data of the target monitoring pit, and select a target monitoring drone;

[0039] A monitoring point selection unit is used to obtain the monitoring take-off position of the target monitoring drone, construct a monitoring space coordinate system, analyze the foundation pit BIM data, and select deformation monitoring points in the monitoring space coordinate system;

[0040] a cycle dynamic planning unit, configured to obtain construction planning information and meteorological information of the target monitoring foundation pit, analyze the construction planning information and the meteorological information of the location, and dynamically plan a deformation monitoring cycle;

[0041] A deformation monitoring shooting unit is used to periodically control the target monitoring drone to perform deformation monitoring shooting of the target monitoring foundation pit at the deformation monitoring point according to the deformation monitoring cycle, and obtain foundation pit shooting data;

[0042] The foundation pit deformation early warning unit is used to perform feature recognition and change analysis on the foundation pit shooting data, determine whether there is a risk of foundation pit deformation, and issue a foundation pit deformation early warning when there is a risk of foundation pit deformation.

[0043] As a further limitation of the technical solution of the embodiment of the present invention, the BIM data acquisition unit specifically includes:

[0044] Foundation pit determination module, used to determine the target monitoring foundation pit;

[0045] An information acquisition module is used to obtain target basic information of the target monitoring pit;

[0046] A data matching module is used to match the foundation pit BIM data of the target monitoring foundation pit according to the target basic information;

[0047] The drone selection module is used to select the target monitoring drone.

[0048] As a further limitation of the technical solution of the embodiment of the present invention, the monitoring point selection unit specifically includes:

[0049] A position acquisition module is used to obtain the monitoring take-off position of the target monitoring drone;

[0050] A coordinate system construction module, configured to construct a monitoring space coordinate system with the monitoring takeoff position as the space coordinate origin;

[0051] An environment construction module, configured to construct a monitoring space environment based on the monitoring space coordinate system;

[0052] The point selection module is used to import the foundation pit BIM data in the monitoring space environment, perform monitoring point analysis, and select deformation monitoring points.

[0053] As a further limitation of the technical solution of the embodiment of the present invention, the foundation pit deformation early warning unit specifically includes:

[0054] A feature recognition module is used to perform feature recognition on the foundation pit photographed data to obtain foundation pit feature data;

[0055] History import module, used to import historical feature data;

[0056] a change analysis module, configured to perform a change analysis on the foundation pit characteristic data based on the historical characteristic data to determine whether there is a risk of foundation pit deformation;

[0057] A signal generation module is used to generate a deformation warning signal when there is a risk of foundation pit deformation;

[0058] The deformation warning module is used to provide foundation pit deformation warning according to the deformation warning signal.

[0059] Compared with the prior art, the present invention has the following beneficial effects:

[0060] The embodiment of the present invention obtains the BIM data of the target monitoring pit and selects the target monitoring drone; constructs a monitoring space coordinate system, selects deformation monitoring points; dynamically plans the deformation monitoring cycle; periodically performs deformation monitoring photography to obtain pit photography data; performs feature recognition and change analysis on the pit photography data, and issues a pit deformation warning when there is a risk of pit deformation. The system can construct a monitoring space coordinate system, select deformation monitoring points, dynamically plan the deformation monitoring cycle, periodically control the target monitoring drone to perform deformation monitoring photography, and issue a pit deformation warning when there is a risk of pit deformation. The monitoring and warning arrangement is simple, and does not require a large number of technical personnel to process and analyze, effectively reducing time and labor costs, and greatly reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention.

[0062] Figure 1 A flow chart of a method provided by an embodiment of the present invention is shown.

[0063] Figure 2 A flow chart of determining a target monitoring pit in the method provided by an embodiment of the present invention is shown.

[0064] Figure 3 A flow chart of selecting deformation monitoring points in the method provided by an embodiment of the present invention is shown.

[0065] Figure 4 A flow chart of dynamically planning a deformation monitoring cycle in the method provided by an embodiment of the present invention is shown.

[0066] Figure 5 A flow chart of obtaining foundation pit photographing data in the method provided by an embodiment of the present invention is shown.

[0067] Figure 6 A flow chart of foundation pit deformation early warning in the method provided by an embodiment of the present invention is shown.

[0068] Figure 7 The application architecture diagram of the system provided by the embodiment of the present invention is shown.

[0069] Figure 8 A structural block diagram of a BIM data acquisition unit in a system provided by an embodiment of the present invention is shown.

[0070] Figure 9 The figure shows a structural block diagram of a monitoring point selection unit in a system provided by an embodiment of the present invention.

[0071] Figure 10 The structure block diagram of the foundation pit deformation early warning unit in the system provided by the embodiment of the present invention is shown. DETAILED DESCRIPTION

[0072] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0073] It is understandable that in the existing technology, in order to improve the accuracy of foundation pit deformation monitoring, fiber optic sensing technology is usually used for foundation pit deformation monitoring. Although the monitoring accuracy and automation level can be effectively improved, the layout of fiber optic sensing is relatively cumbersome and requires many technicians to process and analyze, which increases time and labor costs, and the maintenance cost is also high.

[0074] To address the above-mentioned issues, the present invention comprises the following steps: determining a target monitoring pit, obtaining the BIM data of the target monitoring pit, and selecting a target monitoring drone; obtaining the monitoring takeoff position of the target monitoring drone, constructing a monitoring spatial coordinate system, analyzing the BIM data of the pit, selecting deformation monitoring points within the monitoring spatial coordinate system; obtaining construction planning information and meteorological information at the location of the target monitoring pit, analyzing the construction planning information and meteorological information at the location, and dynamically planning a deformation monitoring cycle; periodically controlling the target monitoring drone to perform deformation monitoring photography of the target monitoring pit at the deformation monitoring points according to the deformation monitoring cycle, and obtaining photographic data; performing feature recognition and change analysis on the photographic data to determine whether there is a risk of pit deformation, and issuing a pit deformation warning if there is a risk of pit deformation. The present invention is capable of constructing a monitoring spatial coordinate system, selecting deformation monitoring points, dynamically planning a deformation monitoring cycle, periodically controlling the target monitoring drone to perform deformation monitoring photography, and issuing a pit deformation warning if there is a risk of pit deformation. The monitoring and warning system is simple to deploy, eliminating the need for numerous technicians to process and analyze the data, effectively reducing time and labor costs, and significantly lowering maintenance costs.

[0075] Figure 1A flow chart of a method provided by an embodiment of the present invention is shown.

[0076] Specifically, a BIM-based construction process foundation pit deformation monitoring and early warning method includes the following steps:

[0077] Step S101: determine a target monitoring pit, obtain the pit BIM data of the target monitoring pit, and select a target monitoring drone.

[0078] In an embodiment of the present invention, by determining the target monitoring pit that requires deformation monitoring and early warning, the target basic information of the target monitoring pit is obtained, and the pit BIM data of the target monitoring pit is matched according to the target basic information. A plurality of idle drones near the target monitoring pit are determined, and the target monitoring drone is selected from them.

[0079] Specifically, Figure 2 A flow chart of determining a target monitoring pit in the method provided by an embodiment of the present invention is shown.

[0080] In a preferred embodiment of the present invention, the steps of determining a target monitoring pit, obtaining BIM data of the target monitoring pit, and selecting a target monitoring drone specifically include the following steps:

[0081] Step S1011, determining the target monitoring pit;

[0082] Step S1012, obtaining target basic information of the target monitoring pit;

[0083] Step S1013, matching the foundation pit BIM data of the target monitoring foundation pit according to the target basic information;

[0084] Step S1014: Select a target monitoring drone.

[0085] Specifically, according to the target basic information, the foundation pit BIM data of the target monitoring foundation pit is matched, and the specific steps are as follows:

[0086] Obtaining a location, a size, a shape, and a depth of a foundation pit based on the target foundation information, wherein the location of the foundation pit corresponds to the size of the foundation pit in a one-to-one manner;

[0087] Obtain the location, size, shape and depth of the foundation pit based on the foundation pit BIM data, wherein the location of the foundation pit corresponds to the size of the foundation pit one by one;

[0088] Preprocess the BIM data in the BIM database using the verification mechanism of the integrity constraint rules to obtain preprocessed BIM data;

[0089] Traverse the pre-processed BIM data in the BIM database, and match the current foundation pit position with the foundation pit position based on multi-dimensional data analysis. If the two are equal, the match is successful, and the corresponding pre-processed BIM data is output; if there is a deviation between the current foundation pit position and the foundation pit position, the preset tolerance range is used to determine whether the match is successful; otherwise, the match fails, and the current pre-processed BIM data is skipped, and the next pre-processed BIM data is compared;

[0090] After the comparison is completed, all the output pre-processed BIM data are collected into a data list, and the matching accuracy is adjusted based on the dynamic optimization matching rules and combined with the historical matching data;

[0091] Traverse all pre-processed BIM data in the data list, use a multi-dimensional fusion matching strategy, combine shape and depth, and further match the size of the current foundation pit with the size of the foundation pit. If the two are equal, the match is successful, and the matched pre-processed BIM data is output and obtained; otherwise, the match fails, and the current pre-processed BIM data is skipped, and the comparison continues with the next pre-processed BIM data;

[0092] After the comparison is completed, all pre-processed BIM data that are successfully matched are output.

[0093] Specifically, the pre-processed BIM data in the BIM database is traversed, and the location of the current foundation pit is matched with the location of the foundation pit based on multi-dimensional data analysis. The specific steps are as follows:

[0094] Extract the location coordinates of the foundation pit and the location coordinates of the current foundation pit;

[0095] Calculate the difference between the location coordinates of the foundation pit and the location coordinates of the current foundation pit dimension by dimension to obtain the dimensional offset;

[0096] Accumulate the squares of the offsets in the dimensions to get the sum of the squares of the offsets;

[0097] Perform a square root operation on the sum of the squares of the offsets to obtain the spatial distance between the foundation pit and the current foundation pit;

[0098] Set the distance tolerance range;

[0099] According to the distance tolerance range, the spatial distance between the foundation pit and the current foundation pit is matched with the distance tolerance range;

[0100] When the spatial distance between the foundation pit and the current foundation pit is less than or equal to the distance tolerance range, it is confirmed that the position information of the foundation pit foundation matches the position information of the current foundation pit successfully; when the spatial distance between the foundation pit and the current foundation pit is greater than the distance tolerance range, it is confirmed that the position information of the foundation pit foundation matches the position information of the current foundation pit, and the next data is processed.

[0101] Furthermore, the BIM-based construction process foundation pit deformation monitoring and early warning method further includes the following steps:

[0102] Step S102: obtaining the monitoring take-off position of the target monitoring drone, constructing a monitoring space coordinate system, analyzing the foundation pit BIM data, and selecting deformation monitoring points in the monitoring space coordinate system.

[0103] In an embodiment of the present invention, by obtaining the monitoring take-off position of the target monitoring UAV, a monitoring space coordinate system is constructed with the monitoring take-off position as the origin of the spatial coordinate. Then, based on the monitoring space coordinate system, a monitoring space environment is constructed, and the foundation pit BIM data is imported into the monitoring space environment. By performing monitoring point analysis on the foundation pit BIM data, the deformation monitoring point on the upper side of the target monitoring foundation pit is selected.

[0104] Specifically, Figure 3 A flow chart of selecting deformation monitoring points in the method provided by an embodiment of the present invention is shown.

[0105] Among them, in the preferred embodiment provided by the present invention, the acquisition of the monitoring take-off position of the target monitoring drone, the construction of the monitoring space coordinate system, and the analysis of the foundation pit BIM data, and the selection of deformation monitoring points in the monitoring space coordinate system specifically include the following steps:

[0106] Step S1021, obtaining the monitoring take-off position of the target monitoring UAV;

[0107] Step S1022, constructing a monitoring space coordinate system with the monitoring takeoff position as the space coordinate origin;

[0108] Step S1023: constructing a monitoring space environment based on the monitoring space coordinate system;

[0109] Step S1024: In the monitoring space environment, the foundation pit BIM data is imported, and monitoring point analysis is performed to select deformation monitoring points.

[0110] Specifically, in the monitoring space environment, the foundation pit BIM data is imported, and monitoring point analysis is performed to select deformation monitoring points. The specific steps are as follows:

[0111] Extract the coordinate points of foundation pit BIM data from foundation pit BIM data;

[0112] Generate reference coordinate points based on the distribution characteristics and adjacent relationships of the coordinate points of the foundation pit BIM data;

[0113] For foundation pits that do not meet the preset regularity, a multi-region collaborative reference point optimization mechanism is used to generate reference coordinate points in combination with regional division and weight distribution.

[0114] Based on the reference coordinate point, record the three components of the coordinate point of each foundation pit BIM data one by one, specifically including the horizontal coordinate of the data coordinate point, the vertical coordinate of the data coordinate point, and the height of the data coordinate point;

[0115] Decompose the reference coordinate point into three components, specifically including the abscissa of the reference coordinate point, the ordinate of the reference coordinate point, and the height of the reference coordinate point;

[0116] Add the abscissa of the data coordinate point and the abscissa of the reference coordinate point to obtain the abscissa of the deformation monitoring point;

[0117] Add the ordinate of the data coordinate point to the ordinate of the reference coordinate point to obtain the ordinate of the deformation monitoring point;

[0118] Add the height of the data coordinate point to the height of the reference coordinate point to obtain the height of the deformation monitoring point;

[0119] Based on the horizontal coordinate of the deformation monitoring point, the vertical coordinate of the deformation monitoring point and the height of the deformation monitoring point, the coordinates of the deformation monitoring point are generated to further determine the position of the deformation monitoring point, and at the same time associate the time dimension and construction stage information.

[0120] Specifically, for foundation pits that do not meet the preset regularity, a multi-region collaborative reference point optimization mechanism is used to generate reference coordinate points in combination with regional division and weight distribution. The specific steps are as follows:

[0121] Extract the coordinate points of the current foundation pit and traverse the coordinate points of the current foundation pit one by one;

[0122] Determine whether the current foundation pit is within the current area boundary based on the horizontal and vertical coordinates of the current foundation pit coordinate point;

[0123] If it is within the current area boundary, the coordinate point of the current foundation pit is assigned to the current area set;

[0124] Extract the coordinate points of all foundation pits in the current area set into a matrix;

[0125] The horizontal coordinate, vertical coordinate and height of the coordinate point of the current foundation pit are weighted averaged using the weights to obtain the coordinates of the reference point corresponding to the current foundation pit;

[0126] Traverse each reference point and check whether there is an adjacent area for the current reference point;

[0127] If there is an adjacent area, the coordinates of the reference point in the adjacent area are averaged with the coordinates of the current reference point to obtain the smoothed coordinates of the reference point and output them;

[0128] If there is no adjacent area, the current reference point coordinates remain unchanged and are output.

[0129] The present invention reads the coordinates of all points from BIM data and converts the coordinates of all points into deformation monitoring point coordinates using reference coordinates. This process ensures that all points are expressed in a unified reference coordinate system to facilitate subsequent monitoring and analysis.

[0130] Furthermore, the BIM-based construction process foundation pit deformation monitoring and early warning method further includes the following steps:

[0131] Step S103: obtaining the construction planning information and the meteorological information of the target monitoring foundation pit, analyzing the construction planning information and the meteorological information of the target monitoring foundation pit, and dynamically planning the deformation monitoring cycle.

[0132] Specifically, the construction planning information and the location weather information are analyzed to dynamically plan the deformation monitoring period. The specific steps are as follows:

[0133] When the meteorological conditions are normal and the construction phase is at a critical phase, the current construction phase is recorded as a non-critical phase, the current meteorological conditions are recorded as normal meteorological conditions, and the current monitoring period is set as the default monitoring period;

[0134] Determine the corresponding precipitation threshold and wind speed threshold based on normal meteorological conditions and location meteorological information;

[0135] Extract the current precipitation and wind speed from the current location's meteorological information. If either the current precipitation or the current wind speed exceeds a precipitation threshold or a wind speed threshold, it is determined to be severe weather. The monitoring period is shortened based on the default monitoring period to obtain a monitoring period adjusted based on the current weather.

[0136] Determine the current construction phase from the current construction planning information;

[0137] The current construction stage is judged based on the non-critical stage. If the current construction stage is also a non-critical stage, the monitoring period is shortened based on the default monitoring period to obtain a monitoring period adjusted based on the current construction stage.

[0138] The shortest monitoring period is determined by combining the monitoring period adjusted based on the current weather and the monitoring period adjusted based on the current construction stage, so as to realize dynamic planning of deformation monitoring period.

[0139] The present invention analyzes the current location meteorological information and the current construction planning information one by one, and dynamically adjusts the monitoring cycle according to meteorological conditions and construction stages, so as to flexibly respond to complex changes in the construction environment.

[0140] In an embodiment of the present invention, the construction planning information of the target monitoring pit is obtained, and the target pit position of the target monitoring pit is extracted from the target basic information. Then, based on the target pit position, the location meteorological information of the target monitoring pit is obtained. The comprehensive construction planning information and location meteorological information are analyzed, and the deformation monitoring period is dynamically planned so that the deformation monitoring period is related to the construction planning information and location meteorological information. The higher the construction frequency and duration, the shorter the deformation monitoring period; the greater the probability of rain, flooding, etc., the shorter the deformation monitoring period.

[0141] Specifically, Figure 4 A flow chart of dynamically planning a deformation monitoring cycle in the method provided by an embodiment of the present invention is shown.

[0142] In a preferred embodiment of the present invention, obtaining the construction planning information and the meteorological information of the target monitoring pit, analyzing the construction planning information and the meteorological information of the target monitoring pit, and dynamically planning the deformation monitoring cycle specifically include the following steps:

[0143] Step S1031, obtaining construction planning information of the target monitoring foundation pit;

[0144] Step S1032: extracting the target foundation pit position of the target monitoring foundation pit from the target basic information;

[0145] Step S1033, obtaining location meteorological information according to the target foundation pit location;

[0146] Step S1034: Analyze the construction planning information and the location weather information to dynamically plan a deformation monitoring period.

[0147] Furthermore, the BIM-based construction process foundation pit deformation monitoring and early warning method further includes the following steps:

[0148] Step S104 , according to the deformation monitoring cycle, periodically controlling the target monitoring UAV to perform deformation monitoring photography of the target monitoring foundation pit at the deformation monitoring point to obtain foundation pit photography data.

[0149] In an embodiment of the present invention, deformation monitoring instructions are periodically generated according to the deformation monitoring cycle. The deformation monitoring instructions are sent to the target monitoring UAV. After receiving the deformation monitoring instructions, the target monitoring UAV flies to the deformation monitoring point in accordance with the deformation monitoring instructions, performs deformation monitoring shooting of the target monitoring foundation pit, and feeds back the foundation pit shooting data, thereby obtaining the foundation pit shooting data transmitted by the target monitoring UAV.

[0150] Specifically, Figure 5 A flow chart of obtaining foundation pit photographing data in the method provided by an embodiment of the present invention is shown.

[0151] In a preferred embodiment of the present invention, the target monitoring drone is periodically controlled to perform deformation monitoring photography of the target monitoring foundation pit at the deformation monitoring point according to the deformation monitoring period, and obtaining the photography data of the foundation pit specifically includes the following steps:

[0152] Step S1041, periodically generating deformation monitoring instructions according to the deformation monitoring cycle;

[0153] Step S1042, sending the deformation monitoring instruction to the target monitoring UAV;

[0154] Step S1043 : Control the target monitoring UAV to perform deformation monitoring photography of the target monitoring foundation pit at the deformation monitoring point to obtain foundation pit photography data.

[0155] Specifically, the target monitoring drone is controlled to perform deformation monitoring photography of the target monitoring foundation pit at the deformation monitoring point to obtain foundation pit photography data. The specific steps are as follows:

[0156] The spatial coordinates of the monitoring points and the total number of monitoring points are obtained through BIM. The Euclidean distance between the front and rear monitoring points is calculated based on the spatial coordinates of the monitoring points. The flight path optimization strategy is calculated based on the Euclidean distance and the total number of monitoring points. The relationship between the corresponding process is:

[0157] ;

[0158] in, represents the flight path optimization strategy, represents the total number of monitoring points, Indicates the The spatial coordinates of the monitoring points, Indicates the The spatial coordinates of the monitoring points, Represents the flight distance weight coefficient;

[0159] The shooting angle is determined by the parameters of the drone camera, and the adjustment amount of the shooting angle is determined based on the shooting angle. The angle adjustment optimization strategy is calculated based on the adjustment amount of the shooting angle and the total number of monitoring points. The relationship between the corresponding process is:

[0160] ;

[0161] in, represents the perspective adjustment optimization strategy, represents the perspective adjustment weight coefficient, Indicates in The shooting angle of each monitoring point, Indicates in Shooting angles of each monitoring point;

[0162] Obtain the total number of foundation pit deformation monitoring points, obtain the position coordinates of the foundation pit deformation monitoring points based on BIM, and then calculate and determine the optimization strategy of the deformation monitoring points based on the total number of foundation pit deformation monitoring points and the position coordinates of the foundation pit deformation monitoring points. The corresponding relationship in the process is:

[0163] ;

[0164] in, represents the optimization strategy of deformation monitoring points, represents the weight coefficient of the deformation monitoring point, Indicates the Coordinates of deformation monitoring points, 、 and Both indicate The unique component of a deformation monitoring point, represents the deformation function of the monitoring point;

[0165] Combining the flight path optimization strategy, the view angle adjustment optimization strategy, and the deformation monitoring point optimization strategy, a comprehensive optimization strategy is obtained. The relationship between the corresponding processes is:

[0166] ;

[0167] in, represents a comprehensive optimization strategy;

[0168] A comprehensive optimization strategy is used to optimize drone deformation monitoring shooting and obtain foundation pit shooting data.

[0169] Furthermore, the present invention reduces the probability of foundation pit safety accidents by giving priority to covering high-risk areas to ensure the timeliness and pertinence of monitoring; the present invention emphasizes the importance of deformation. When the deformation of a monitoring point approaches or exceeds the tolerance threshold, the deformation will increase to force the optimization strategy to give priority to covering these monitoring points.

[0170] Furthermore, the BIM-based construction process foundation pit deformation monitoring and early warning method further includes the following steps:

[0171] Step S105 , performing feature recognition and change analysis on the foundation pit photographed data to determine whether there is a risk of foundation pit deformation, and issuing a foundation pit deformation warning when there is a risk of foundation pit deformation.

[0172] In an embodiment of the present invention, feature recognition is performed on the photographed data of the foundation pit to obtain foundation pit feature data, and historical feature data is imported. Based on the historical feature data, a change analysis is performed on the foundation pit feature data to determine whether there is a risk of foundation pit deformation, and when there is a risk of foundation pit deformation, a deformation warning signal is generated. At this time, a foundation pit deformation warning is performed according to the deformation warning signal.

[0173] Specifically, Figure 6 A flow chart of foundation pit deformation early warning in the method provided by an embodiment of the present invention is shown.

[0174] Among them, in the preferred embodiment provided by the present invention, the feature recognition and change analysis of the foundation pit photographed data to determine whether there is a risk of foundation pit deformation, and when there is a risk of foundation pit deformation, the foundation pit deformation warning is specifically carried out including the following steps:

[0175] Step S1051, performing feature recognition on the foundation pit photographed data to obtain foundation pit feature data;

[0176] Step S1052, importing historical feature data;

[0177] Step S1053: performing a change analysis on the foundation pit characteristic data based on the historical characteristic data to determine whether there is a risk of foundation pit deformation;

[0178] Step S1054: When there is a risk of foundation pit deformation, a deformation warning signal is generated;

[0179] Step S1055: Perform foundation pit deformation warning according to the deformation warning signal.

[0180] Specifically, based on the historical characteristic data, a change analysis is performed on the foundation pit characteristic data to determine whether there is a risk of foundation pit deformation. The specific steps are as follows:

[0181] Foundation pit characteristic data and historical characteristic data, obtaining foundation pit characteristic values and historical characteristic values, and generating a foundation pit characteristic value list and a historical characteristic value list, wherein the characteristic values in the foundation pit characteristic value list correspond one to one with the characteristic values in the historical characteristic value list;

[0182] Setting risk judgment thresholds based on the allowable range of characteristic value changes;

[0183] Calculate the difference between each pair of foundation pit characteristic values and historical characteristic values, take the absolute value of the difference, and obtain the absolute value of the difference;

[0184] Then the absolute value of the difference is compared with the historical characteristic value to obtain the change degree value;

[0185] The degree of change value is compared with the risk judgment threshold. When the degree of change value is greater than the risk judgment threshold, it indicates that there is a certain deformation risk. The calculation is then terminated and a deformation warning signal is generated. When the degree of change value is less than the risk judgment threshold, it indicates that there is no deformation risk. The next foundation pit characteristic value is then processed until all foundation pit characteristic values are processed.

[0186] The present invention compares the characteristic values of the foundation pit with the historical characteristic values, calculates the change amplitude one by one, then compares the change amplitude with the risk judgment threshold, and finally judges the change amplitude based on the risk judgment threshold, and further judges the current foundation pit deformation risk. The judgment process can keenly capture possible risk signals and ensure timely warning to ensure safety.

[0187] Further, Figure 7 The application architecture diagram of the system provided by the embodiment of the present invention is shown.

[0188] In another preferred embodiment of the present invention, a BIM-based foundation pit deformation monitoring and early warning system for construction process includes:

[0189] The BIM data acquisition unit 101 is used to determine a target monitoring pit, acquire the BIM data of the target monitoring pit, and select a target monitoring drone.

[0190] In an embodiment of the present invention, the BIM data acquisition unit 101 determines the target monitoring pit that requires deformation monitoring and early warning, obtains the target basic information of the target monitoring pit, matches the pit BIM data of the target monitoring pit based on the target basic information, and determines multiple drones that are idle near the target monitoring pit, and selects the target monitoring drone from them.

[0191] Specifically, Figure 8 It shows a structural block diagram of the BIM data acquisition unit 101 in the system provided by an embodiment of the present invention.

[0192] In a preferred embodiment of the present invention, the BIM data acquisition unit 101 specifically includes:

[0193] The foundation pit determination module 1011 is used to determine the target monitoring foundation pit;

[0194] An information acquisition module 1012 is used to acquire target basic information of the target monitoring pit;

[0195] The data matching module 1013 is used to match the foundation pit BIM data of the target monitoring foundation pit according to the target basic information;

[0196] The drone selection module 1014 is used to select a target monitoring drone.

[0197] Furthermore, the BIM-based construction process foundation pit deformation monitoring and early warning system also includes:

[0198] The monitoring point selection unit 102 is used to obtain the monitoring take-off position of the target monitoring drone, construct a monitoring space coordinate system, analyze the foundation pit BIM data, and select deformation monitoring points in the monitoring space coordinate system.

[0199] In an embodiment of the present invention, the monitoring point selection unit 102 obtains the monitoring take-off position of the target monitoring UAV, takes the monitoring take-off position as the spatial coordinate origin, constructs a monitoring space coordinate system, and then constructs a monitoring space environment based on the monitoring space coordinate system. The foundation pit BIM data is imported into the monitoring space environment, and the deformation monitoring point on the upper side of the target monitoring foundation pit is selected by performing monitoring point analysis on the foundation pit BIM data.

[0200] Specifically, Figure 9 FIG. 1 shows a structural block diagram of the monitoring point selection unit 102 in the system provided by an embodiment of the present invention.

[0201] In a preferred embodiment of the present invention, the monitoring point selection unit 102 specifically includes:

[0202] The position acquisition module 1021 is used to obtain the monitoring take-off position of the target monitoring UAV;

[0203] A coordinate system construction module 1022 is configured to construct a monitoring space coordinate system with the monitoring takeoff position as the space coordinate origin;

[0204] An environment construction module 1023 is used to construct a monitoring space environment based on the monitoring space coordinate system;

[0205] The point selection module 1024 is used to import the foundation pit BIM data into the monitoring space environment, perform monitoring point analysis, and select deformation monitoring points.

[0206] Furthermore, the BIM-based construction process foundation pit deformation monitoring and early warning system also includes:

[0207] The cycle dynamic planning unit 103 is used to obtain the construction planning information and the location weather information of the target monitoring foundation pit, analyze the construction planning information and the location weather information, and dynamically plan the deformation monitoring cycle.

[0208] In an embodiment of the present invention, the period dynamic planning unit 103 obtains the construction planning information of the target monitoring pit, extracts the target pit position of the target monitoring pit from the target basic information, and then obtains the location meteorological information of the target monitoring pit based on the target pit position, comprehensively analyzes the construction planning information and the location meteorological information, and dynamically plans the deformation monitoring period, so that the deformation monitoring period is related to the construction planning information and the location meteorological information. The higher the construction frequency and duration, the shorter the deformation monitoring period; the greater the probability of rain, flooding, etc., the shorter the deformation monitoring period.

[0209] The deformation monitoring shooting unit 104 is used to periodically control the target monitoring UAV to perform deformation monitoring shooting of the target monitoring foundation pit at the deformation monitoring point according to the deformation monitoring cycle, and obtain foundation pit shooting data.

[0210] In an embodiment of the present invention, the deformation monitoring shooting unit 104 periodically generates deformation monitoring instructions according to the deformation monitoring cycle, and sends the deformation monitoring instructions to the target monitoring UAV. After receiving the deformation monitoring instructions, the target monitoring UAV flies to the deformation monitoring point in accordance with the deformation monitoring instructions, performs deformation monitoring shooting of the target monitoring foundation pit, and feeds back the foundation pit shooting data, thereby obtaining the foundation pit shooting data transmitted by the target monitoring UAV.

[0211] The foundation pit deformation warning unit 105 is used to perform feature recognition and change analysis on the foundation pit photographed data to determine whether there is a risk of foundation pit deformation, and to issue a foundation pit deformation warning when there is a risk of foundation pit deformation.

[0212] In an embodiment of the present invention, the foundation pit deformation warning unit 105 obtains foundation pit feature data by performing feature recognition on the foundation pit photographed data, and imports historical feature data. Based on the historical feature data, the foundation pit feature data is analyzed for changes to determine whether there is a risk of foundation pit deformation, and a deformation warning signal is generated when there is a risk of foundation pit deformation. At this time, a foundation pit deformation warning is performed according to the deformation warning signal.

[0213] Specifically, Figure 10 A structural block diagram of the foundation pit deformation warning unit 105 in the system provided by an embodiment of the present invention is shown.

[0214] In a preferred embodiment of the present invention, the foundation pit deformation warning unit 105 specifically includes:

[0215] The feature recognition module 1051 is used to perform feature recognition on the foundation pit photographed data to obtain foundation pit feature data;

[0216] A history import module 1052 is used to import historical feature data;

[0217] A change analysis module 1053 is used to perform a change analysis on the foundation pit characteristic data based on the historical characteristic data to determine whether there is a risk of foundation pit deformation;

[0218] The signal generating module 1054 is used to generate a deformation warning signal when there is a risk of foundation pit deformation;

[0219] The deformation warning module 1055 is used to provide foundation pit deformation warning according to the deformation warning signal.

[0220] It should be understood that, although the various steps in the flow chart of each embodiment of the present invention are shown in sequence according to the indication of the arrows, these steps are not necessarily performed in sequence according to the order indicated by the arrows. Unless otherwise specified herein, the execution of these steps is not strictly limited in order, and these steps can be performed in other orders. Moreover, at least a portion of the steps in each embodiment may include a plurality of sub-steps or a plurality of stages, and these sub-steps or stages are not necessarily performed at the same time, but can be performed at different times, and the execution order of these sub-steps or stages is not necessarily performed in sequence, but can be performed in turn or alternately with at least a portion of other steps or sub-steps or stages of other steps.

[0221] Those skilled in the art will appreciate that all or part of the processes in the above-described method embodiments can be implemented by instructing the relevant hardware through a computer program. The program can be stored in a non-volatile computer-readable storage medium. When executed, the program can include the processes of the above-described method embodiments. Any reference to memory, storage, database, or other media used in the various embodiments provided herein may include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), RAMbus direct RAM (RDRAM), direct RAMbus dynamic RAM (DRDRAM), and RAMbus dynamic RAM (RDRAM).

[0222] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0223] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

[0224] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A BIM-based construction process foundation pit deformation monitoring and early warning method, characterized in that: The method specifically comprises the following steps: Determine the target monitoring pit, obtain the pit BIM data of the target monitoring pit, and select the target monitoring drone; Obtaining the monitoring takeoff position of the target monitoring drone, constructing a monitoring space coordinate system, analyzing the foundation pit BIM data, and selecting deformation monitoring points in the monitoring space coordinate system; Acquiring construction planning information and location weather information of the target monitoring foundation pit, analyzing the construction planning information and the location weather information, and dynamically planning a deformation monitoring cycle; According to the deformation monitoring cycle, periodically controlling the target monitoring drone to perform deformation monitoring photography of the target monitoring foundation pit at the deformation monitoring point to obtain foundation pit photography data; Performing feature recognition and change analysis on the photographed data of the foundation pit to determine whether there is a risk of foundation pit deformation, and issuing a foundation pit deformation warning when there is a risk of foundation pit deformation; The steps of determining a target monitoring pit, obtaining BIM data of the target monitoring pit, and selecting a target monitoring drone specifically include the following steps: Determine the target monitoring pit; Obtaining target basic information of the target monitoring foundation pit; Matching the foundation pit BIM data of the target monitoring foundation pit according to the target basic information; Select target monitoring drone; According to the target basic information, the foundation pit BIM data of the target monitoring foundation pit is matched, and the specific steps are as follows: Obtaining a location, a size, a shape, and a depth of a foundation pit based on the target foundation information, wherein the location of the foundation pit corresponds to the size of the foundation pit in a one-to-one manner; Obtain the location, size, shape and depth of the foundation pit based on the foundation pit BIM data, wherein the location of the foundation pit corresponds to the size of the foundation pit one by one; Preprocess the BIM data in the BIM database using the verification mechanism of the integrity constraint rules to obtain preprocessed BIM data; Traverse the pre-processed BIM data in the BIM database, and match the current foundation pit position with the foundation pit position based on multi-dimensional data analysis. If the two are equal, the match is successful, and the corresponding pre-processed BIM data is output; if there is a deviation between the current foundation pit position and the foundation pit position, the preset tolerance range is used to determine whether the match is successful; otherwise, the match fails, and the current pre-processed BIM data is skipped, and the next pre-processed BIM data is compared; After the comparison is completed, all the output pre-processed BIM data are collected into a data list, and the matching accuracy is adjusted based on the dynamic optimization matching rules and combined with the historical matching data; Traverse all pre-processed BIM data in the data list, use a multi-dimensional fusion matching strategy, combine shape and depth, and further match the size of the current foundation pit with the size of the foundation pit. If the two are equal, the match is successful, and the matched pre-processed BIM data is output and obtained; otherwise, the match fails, and the current pre-processed BIM data is skipped, and the comparison continues with the next pre-processed BIM data; After the comparison is completed, all pre-processed BIM data that have successfully matched are output; The process of obtaining the monitoring takeoff position of the target monitoring drone, constructing a monitoring space coordinate system, and analyzing the foundation pit BIM data includes the following steps: Obtaining the monitoring takeoff position of the target monitoring drone; Taking the monitoring takeoff position as the spatial coordinate origin, constructing a monitoring space coordinate system; Constructing a monitoring space environment based on the monitoring space coordinate system; In the monitoring space environment, the foundation pit BIM data is imported, and monitoring point analysis is performed to select deformation monitoring points; In the monitoring space environment, the foundation pit BIM data is imported, and monitoring point analysis is performed to select deformation monitoring points. The specific steps are as follows: Extract the coordinate points of foundation pit BIM data from foundation pit BIM data; Generate reference coordinate points based on the distribution characteristics and adjacent relationships of the coordinate points of the foundation pit BIM data; For foundation pits that do not meet the preset regularity, a multi-region collaborative reference point optimization mechanism is used to generate reference coordinate points in combination with regional division and weight distribution. Based on the reference coordinate point, record the three components of the coordinate point of each foundation pit BIM data one by one, specifically including the horizontal coordinate of the data coordinate point, the vertical coordinate of the data coordinate point, and the height of the data coordinate point; Decompose the reference coordinate point into three components, specifically including the abscissa of the reference coordinate point, the ordinate of the reference coordinate point, and the height of the reference coordinate point; Add the abscissa of the data coordinate point and the abscissa of the reference coordinate point to obtain the abscissa of the deformation monitoring point; Add the ordinate of the data coordinate point to the ordinate of the reference coordinate point to obtain the ordinate of the deformation monitoring point; Add the height of the data coordinate point to the height of the reference coordinate point to obtain the height of the deformation monitoring point; Based on the horizontal coordinate of the deformation monitoring point, the vertical coordinate of the deformation monitoring point and the height of the deformation monitoring point, the coordinates of the deformation monitoring point are generated to further determine the position of the deformation monitoring point, and at the same time, the time dimension and construction stage information are associated; For foundation pits that do not meet the preset regularity, a multi-region collaborative reference point optimization mechanism is used to generate reference coordinate points in combination with regional division and weight distribution. The specific steps are as follows: Extract the coordinate points of the current foundation pit and traverse the coordinate points of the current foundation pit one by one; Determine whether the current foundation pit is within the current area boundary based on the horizontal and vertical coordinates of the current foundation pit coordinate point; If it is within the current area boundary, the coordinate point of the current foundation pit is assigned to the current area set; Extract the coordinate points of all foundation pits in the current area set into a matrix; The horizontal coordinate, vertical coordinate and height of the coordinate point of the current foundation pit are weighted averaged using the weights to obtain the coordinates of the reference point corresponding to the current foundation pit; Traverse each reference point and check whether there is an adjacent area for the current reference point; If there is an adjacent area, the coordinates of the reference point in the adjacent area are averaged with the coordinates of the current reference point to obtain the smoothed coordinates of the reference point and output them; If there is no adjacent area, keep the current reference point coordinates unchanged and output; The method of periodically controlling the target monitoring drone to perform deformation monitoring photography of the target monitoring foundation pit at the deformation monitoring point according to the deformation monitoring cycle, and obtaining the photography data of the foundation pit specifically comprises the following steps: periodically generating deformation monitoring instructions according to the deformation monitoring cycle; sending the deformation monitoring instruction to the target monitoring UAV; Controlling the target monitoring UAV to perform deformation monitoring photography of the target monitoring foundation pit at the deformation monitoring point to obtain foundation pit photography data; The step of controlling the target monitoring drone to perform deformation monitoring photography of the target monitoring foundation pit at the deformation monitoring point and obtaining photography data of the foundation pit specifically includes the following sub-steps: The spatial coordinates of the monitoring points and the total number of monitoring points are obtained through BIM. The Euclidean distance between the front and rear monitoring points is calculated based on the spatial coordinates of the monitoring points. The flight path optimization strategy is calculated based on the Euclidean distance and the total number of monitoring points. The relationship between the corresponding process is: ； in, represents the flight path optimization strategy, represents the total number of monitoring points, Indicates the The spatial coordinates of the monitoring points, Indicates the The spatial coordinates of the monitoring points, Represents the flight distance weight coefficient; The shooting angle is determined by the parameters of the drone camera, and the adjustment amount of the shooting angle is determined based on the shooting angle. The angle adjustment optimization strategy is calculated based on the adjustment amount of the shooting angle and the total number of monitoring points. The relationship between the corresponding process is: ； in, represents the perspective adjustment optimization strategy, represents the perspective adjustment weight coefficient, Indicates in The shooting angle of each monitoring point, Indicates in Shooting angles of each monitoring point; Obtain the total number of foundation pit deformation monitoring points, obtain the position coordinates of the foundation pit deformation monitoring points based on BIM, and then calculate and determine the optimization strategy of the deformation monitoring points based on the total number of foundation pit deformation monitoring points and the position coordinates of the foundation pit deformation monitoring points. The corresponding relationship in the process is: ； in, represents the optimization strategy of deformation monitoring points, represents the weight coefficient of the deformation monitoring point, Indicates the Coordinates of deformation monitoring points, 、 and Both indicate The unique component of a deformation monitoring point, represents the deformation function of the monitoring point; Combining the flight path optimization strategy, the view angle adjustment optimization strategy, and the deformation monitoring point optimization strategy, a comprehensive optimization strategy is obtained. The relationship between the corresponding processes is: ； in, represents a comprehensive optimization strategy; A comprehensive optimization strategy is used to optimize drone deformation monitoring shooting and obtain foundation pit shooting data.

2. The BIM-based construction process foundation pit deformation monitoring and early warning method according to claim 1 is characterized in that: Traverse the pre-processed BIM data in the BIM database and match the current foundation pit location with the foundation pit location based on multi-dimensional data analysis. The specific steps are as follows: Extract the location coordinates of the foundation pit and the location coordinates of the current foundation pit; Calculate the difference between the location coordinates of the foundation pit and the location coordinates of the current foundation pit dimension by dimension to obtain the dimensional offset; Accumulate the squares of the offsets in the dimensions to get the sum of the squares of the offsets; Perform a square root operation on the sum of the squares of the offsets to obtain the spatial distance between the foundation pit and the current foundation pit; Set the distance tolerance range; According to the distance tolerance range, the spatial distance between the foundation pit and the current foundation pit is matched with the distance tolerance range; When the spatial distance between the foundation pit and the current foundation pit is less than or equal to the tolerance range of the distance, it is confirmed that the position information of the foundation pit foundation matches the position information of the current foundation pit successfully; when the spatial distance between the foundation pit and the current foundation pit is greater than the tolerance range of the distance, it is confirmed that the position information of the foundation pit foundation matches the position information of the current foundation pit, and the next data is processed.

3. The BIM-based construction process foundation pit deformation monitoring and early warning method according to claim 1 is characterized in that: The obtaining of the construction planning information and the meteorological information of the target monitoring pit, analyzing the construction planning information and the meteorological information of the target monitoring pit, and dynamically planning the deformation monitoring cycle specifically include the following steps: Obtaining construction planning information of the target monitoring foundation pit; Extracting the target foundation pit position of the target monitoring foundation pit from the target basic information; According to the target foundation pit location, obtaining location meteorological information; The construction planning information and the location meteorological information are analyzed to dynamically plan a deformation monitoring cycle.

4. The BIM-based construction process foundation pit deformation monitoring and early warning method according to claim 3 is characterized in that: Analyzing the construction planning information and the meteorological information of the location and dynamically planning the deformation monitoring period specifically includes the following sub-steps: When the meteorological conditions are normal and the construction phase is in a non-critical phase, the current construction phase is recorded as a non-critical phase, the current meteorological conditions are recorded as normal meteorological conditions, and the current monitoring period is set as the default monitoring period; Determine the corresponding precipitation threshold and wind speed threshold based on normal meteorological conditions and location meteorological information; Extract the current precipitation and wind speed from the current location's meteorological information. If either the current precipitation or the current wind speed exceeds a precipitation threshold or a wind speed threshold, it is determined to be severe weather. The monitoring period is shortened based on the default monitoring period to obtain a monitoring period adjusted based on the current weather. Determine the current construction phase from the current construction planning information; The current construction stage is judged based on the non-critical stage. If the current construction stage is also a non-critical stage, the monitoring period is shortened based on the default monitoring period to obtain a monitoring period adjusted based on the current construction stage. The shortest monitoring period is determined by combining the monitoring period adjusted based on the current weather and the monitoring period adjusted based on the current construction stage, so as to realize dynamic planning of deformation monitoring period.

5. The BIM-based construction process foundation pit deformation monitoring and early warning method according to claim 1 is characterized in that: The method of performing feature recognition and change analysis on the photographed data of the foundation pit to determine whether there is a risk of foundation pit deformation, and performing foundation pit deformation warning when there is a risk of foundation pit deformation specifically includes the following steps: Performing feature recognition on the foundation pit photographed data to obtain foundation pit feature data; Import historical feature data; performing a change analysis on the foundation pit characteristic data based on the historical characteristic data to determine whether there is a risk of foundation pit deformation; When there is a risk of foundation pit deformation, a deformation warning signal is generated; According to the deformation warning signal, a foundation pit deformation warning is carried out.

6. A BIM-based construction process foundation pit deformation monitoring and early warning system, characterized by: The system applies the BIM-based construction process foundation pit deformation monitoring and early warning method as described in any one of claims 1 to 5 above, and the system includes a BIM data acquisition unit, a monitoring point selection unit, a periodic dynamic planning unit, a deformation monitoring and shooting unit, and a foundation pit deformation early warning unit, wherein: A BIM data acquisition unit is used to determine a target monitoring pit, acquire the BIM data of the target monitoring pit, and select a target monitoring drone; A monitoring point selection unit is used to obtain the monitoring take-off position of the target monitoring drone, construct a monitoring space coordinate system, analyze the foundation pit BIM data, and select deformation monitoring points in the monitoring space coordinate system; a cycle dynamic planning unit, configured to obtain construction planning information and meteorological information of the target monitoring foundation pit, analyze the construction planning information and the meteorological information of the location, and dynamically plan a deformation monitoring cycle; A deformation monitoring shooting unit is used to periodically control the target monitoring drone to perform deformation monitoring shooting of the target monitoring foundation pit at the deformation monitoring point according to the deformation monitoring cycle, and obtain foundation pit shooting data; The foundation pit deformation early warning unit is used to perform feature recognition and change analysis on the foundation pit shooting data, determine whether there is a risk of foundation pit deformation, and issue a foundation pit deformation early warning when there is a risk of foundation pit deformation.

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