CN113250169A - Method for monitoring foundation pit of constructional engineering - Google Patents
Method for monitoring foundation pit of constructional engineering Download PDFInfo
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- E—FIXED CONSTRUCTIONS
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Abstract
The invention relates to a method for monitoring a foundation pit of constructional engineering, wherein a plurality of monitoring point positions are pre-buried in a geodetic plane coordinate system of the foundation pit of the constructional engineering, each monitoring point position comprises at least one coordinate control point and a plurality of monitoring points, an original contour line is drawn and formed on the basis of each monitoring point positioned at the same elevation, each original contour line is defined as a measurement group, and each measurement group comprises at least two auxiliary control points and a plurality of encrypted points; monitoring and data acquisition are carried out on each monitoring point in each measurement group by using an unmanned aerial vehicle group, the acquired data are integrated by using a central processing unit to generate a real-time contour line, and the real-time contour line and an original contour line are fitted and compared to obtain a displacement and altitude elevation change value of the construction foundation pit engineering, so that the aim of digitally monitoring the construction foundation pit is fulfilled.
Description
Technical Field
The invention relates to the technical field of civil engineering, in particular to the technical field of foundation pit monitoring of constructional engineering, and specifically relates to a method for monitoring the foundation pit of the constructional engineering.
Background
With the rapid development of economic society in China, residential buildings are also developed unprecedentedly, high-rise residences become the main melody of the development of residential engineering, and foundation pit monitoring work is more and more common. Foundation pit monitoring mainly includes: supporting structures, relevant natural environments, construction conditions, groundwater conditions, foundation pit bottom and surrounding soil, surrounding buildings, surrounding underground pipelines and underground facilities, surrounding important roads and other objects to be monitored.
In the prior art, a monitoring technology for a foundation pit is realized by mainly adopting an installation sensor and utilizing a measuring instrument to carry out data acquisition on each set monitoring point position, and the technical defect is that a digital monitoring scheme for settlement and displacement of the foundation pit of the building engineering cannot be realized.
Disclosure of Invention
The invention aims to: the method is used for monitoring the foundation pit of the building engineering and is used for solving the technical defect that the existing building engineering foundation pit cannot realize digital monitoring.
In order to realize the technical scheme, the invention is realized by the following technical scheme:
a method for monitoring a foundation pit of a building engineering comprises the steps of pre-burying a plurality of monitoring points in a ground plane coordinate system of the foundation pit of the building engineering, wherein each monitoring point comprises at least one coordinate control point and a plurality of monitoring points, drawing and forming an original contour line on the basis of each monitoring point located at the same altitude elevation, defining each original contour line as a measurement group, and each measurement group comprises at least two auxiliary control points and a plurality of encryption points;
monitoring each measurement group by using a surveying and mapping unmanned aerial vehicle group; the unmanned aerial vehicle unit transmits monitoring data to a central processing unit by wireless communication to be integrated to obtain a real-time contour line, the real-time contour line and an original contour line are matched and compared to obtain the latest data value of each point in the foundation pit of the construction engineering, and the displacement and the elevation change value of the foundation pit of the construction engineering are obtained according to the matching and comparing data;
the unmanned aerial vehicle group is used for the monitoring unmanned aerial vehicle including navigation unmanned aerial vehicle and two at least while, navigation unmanned aerial vehicle passes through central processing unit and is connected with flight control system communication, monitoring unmanned aerial vehicle is connected with navigation unmanned aerial vehicle communication, each monitoring unmanned aerial vehicle measures in proper order each monitoring point in measuring the group.
In order to better implement the present invention, as a further optimization of the above technical solution, the central coordinate of the central coordinate point of the original contour line is the central coordinate of the coordinate control point.
As a further optimization of the above technical solution, the altitude difference between two adjacent original contour lines and the altitude difference between two adjacent real-time contour lines are both 1mm to 5mm, and the altitude difference between two adjacent original contour lines is the same as the altitude difference between two adjacent real-time contour lines.
As a further optimization of the technical scheme, the navigation unmanned aerial vehicle comprises a body in communication connection with a central processing unit, a navigation module and a flight control module are arranged on the body, the input end of the navigation module is in communication connection with the central processing unit, and the output end of the navigation module is in communication connection with the input end of the flight control module; the flight control module is provided with at least two output ends, and each output end of the flight control module controls one monitoring unmanned aerial vehicle respectively.
As the further optimization of the technical scheme, the method mainly comprises the following steps:
s1, measuring and pre-embedding coordinate control points near the to-be-built construction engineering foundation pit, and determining the boundary line of the to-be-built construction engineering foundation pit by using the measuring instrument in combination with the coordinate control points and a design drawing;
s2, constructing a protective structure for the building engineering foundation pit on the boundary line of the building engineering foundation pit and excavating the foundation pit in the boundary line;
s3, hardening the bottom of the foundation pit, embedding monitoring points, collecting original data of the monitoring points, generating original contour lines by using the collected original data, and numbering the original contour lines in sequence;
s4, releasing the unmanned aerial vehicle set, sequentially monitoring each monitoring point by using the monitoring unmanned aerial vehicles in the unmanned aerial vehicle set, transmitting data measured by each monitoring unmanned aerial vehicle to a central processor by using a navigation module on the navigation unmanned aerial vehicle, generating a real-time contour line, fitting and comparing the real-time contour line with the original contour line, and obtaining the data change value of each monitoring point.
As a further optimization of the above technical solution, the step S3 mainly includes the following steps:
s31, hardening the bottom of the foundation pit by using C15-C30 concrete;
s32, determining each auxiliary control point and monitoring point at the bottom of the hardened construction engineering foundation pit by using a measuring instrument, and pre-burying reinforcing steel bar heads on each auxiliary control point and each encryption point;
s33, collecting the original data of each auxiliary control point and each encryption point;
s34, importing the original data into a central processing unit to be integrated and generate an original contour line;
and S35, numbering the original contour lines in sequence according to the altitude difference sequence change values.
As a further optimization of the above technical solution, the S4 mainly includes the following steps:
s41, after the navigation unmanned aerial vehicle is controlled by the flight control system to fly to the designated height of the designated area, transmitting each original contour line covering the data information of the monitoring point to the navigation module;
s42, the navigation module distributes the numbered original contour lines to corresponding monitoring unmanned aerial vehicles through output ends on the flight control module respectively;
s43, the flight control module controls the monitoring unmanned aerial vehicle to monitor each monitoring point position on the appointed original contour line through the signal output end of the flight control module, and transmits monitoring data to the navigation module;
s44, the navigation module transmits the received monitoring data to a central processing unit;
s45, the central processing unit integrates the monitoring data to generate a real-time contour line;
and S46, the central processing unit performs fitting comparison on the real-time contour line and the original contour line to obtain data change values such as displacement, altitude and the like of each monitoring point.
Compared with the prior art, the invention has the following advantages and beneficial effects:
the method comprises the steps of pre-embedding a plurality of monitoring point positions in a geodetic plane coordinate system of a foundation pit of the construction engineering, wherein the monitoring point positions comprise at least one coordinate control point and a plurality of monitoring points, drawing and forming original contour lines on the basis of the monitoring points at the same elevation, defining the original contour lines into a measurement group, and each measurement group comprises at least two auxiliary control points and a plurality of encryption points; monitoring and data acquisition are carried out on each monitoring point in each measurement group by using an unmanned aerial vehicle group, the acquired data are integrated by using a central processing unit to generate a real-time contour line, and the real-time contour line and an original contour line are fitted and compared to obtain a displacement and altitude elevation change value of the construction foundation pit engineering, so that the aim of digitally monitoring the construction foundation pit is fulfilled.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a flow chart of a monitoring method of the present invention;
FIG. 2 is a flow chart of a method for generating original contour lines according to the present invention;
FIG. 3 is a flow chart of a method for real-time contour generation in accordance with the present invention;
FIG. 4 is a schematic diagram of the construction of the mapping unmanned aerial vehicle of the present invention;
fig. 5 is a schematic view of the arrangement structure of the present invention.
The figure is marked with 1-construction engineering foundation pit, 2-monitoring point location, 3-unmanned aerial vehicle set, 21-coordinate control point,
22-monitoring point, 31-navigation unmanned aerial vehicle, 32-monitoring unmanned aerial vehicle, 33-central processing unit, 221-auxiliary control point, 222-encryption point, 311-engine body, 312-navigation module and 313-flight control module.
Detailed Description
The present invention will be described in detail and with reference to preferred embodiments thereof, but the present invention is not limited thereto.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "first", "second", "third", etc. are used only for distinguishing the description, and are not intended to indicate or imply relative importance.
The terms "upper", "lower", "left", "right", "inner", "outer", and the like, refer to orientations or positional relationships based on orientations or positional relationships illustrated in the drawings or orientations and positional relationships that are conventionally used in the practice of the products of the present invention, and are used for convenience in describing and simplifying the invention, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the invention.
Furthermore, the terms "vertical" and the like do not require absolute perpendicularity between the components, but may be slightly inclined. Such as "vertical" merely means that the direction is relatively more vertical and does not mean that the structure must be perfectly vertical, but may be slightly inclined.
In the description of the present invention, it is also to be noted that the terms "disposed," "mounted," "connected," and the like are to be construed broadly unless otherwise specifically stated or limited. For example, the connection can be fixed, detachable or integrated; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example (b):
as a preferred embodiment, it is shown in FIG. 1 to FIG. 5;
a method for monitoring a foundation pit of a building engineering comprises the steps of pre-burying a plurality of monitoring point positions 2 in a ground plane coordinate system of a foundation pit 1 of the building engineering, wherein each monitoring point position 2 comprises at least one coordinate control point 21 and a plurality of monitoring points 22, drawing and forming original contour lines on the basis of each monitoring point 22 located at the same altitude elevation, defining each original contour line as a measurement group, and each measurement group comprises at least two auxiliary control points 221 and a plurality of encryption points 222;
monitoring each measurement group by using the surveying and mapping unmanned aerial vehicle set 3; the unmanned aerial vehicle set 3 transmits monitoring data to a central processing unit 33 through wireless communication to be integrated to obtain a real-time contour line, the real-time contour line and an original contour line are matched and compared to obtain the latest data value of each point in the foundation pit 1 of the constructional engineering, and the displacement and the elevation change value of the foundation pit 1 of the constructional engineering are obtained according to the matching and comparing data;
unmanned aerial vehicle group 3 is used for the monitoring unmanned aerial vehicle 32 of monitoring including navigation unmanned aerial vehicle 31 and two at least simultaneously, navigation unmanned aerial vehicle 31 is connected with flight control system communication through central processing unit 33, monitoring unmanned aerial vehicle 32 is connected with navigation unmanned aerial vehicle 31 communication, each monitoring unmanned aerial vehicle 32 measures each monitoring point 22 in each measurement group in proper order.
In order to better implement the present invention, as shown in fig. 1 to 5, the working process of the present invention is as follows: firstly, lofting the building engineering foundation pit 1 to be built by using a surveying instrument, embedding at least one coordinate control point 21, lofting the building engineering foundation pit 1 by using the coordinate control point 21 as a central coordinate, excavating the foundation pit, constructing the bottom of the foundation pit, determining each monitoring point position by using the measuring instrument, embedding the monitoring points, collecting coordinate data of each monitoring point by using the measuring instrument, guiding collected data coordinates into a central processing unit 33 for data integration, drawing an original contour line by using the central processing unit 33, transmitting the data contained in the original contour line to a navigation unmanned aerial vehicle 31, flying the navigation unmanned aerial vehicle 31 to a designated area under the control of a flight control system, after the navigation unmanned aerial vehicle 31 flies to the designated area, controlling the monitoring unmanned aerial vehicle 32 to collect data of each monitoring point 22 by using the navigation unmanned aerial vehicle 31, transmitting the monitoring data to the central processing unit 33 by using the navigation unmanned aerial vehicle 32, the central processor 33 integrates and generates real-time contour lines according to the real-time data, and the real-time contour lines and the original contour lines are matched and compared to obtain data change values of the monitoring points 22, so that the aim of digitally monitoring the foundation pit 1 of the building engineering is fulfilled.
It should be noted that, in the method and the device for generating thick and thin contour lines disclosed in chinese patent CN202010753694.1 and the method for measuring and calculating ground subsidence degree by fusing ArcGIS and entropy weight method disclosed in chinese patent CN201810448692.4, methods for generating contour lines using data points are introduced in detail. Meanwhile, in the invention, when the real-time contour line needs to be compared with the original contour line, the real-time contour line generated in the central processing unit 33 is directly superposed with the original contour line stored in the central processing unit 33, and when the real-time contour line is superposed, the coordinates of each monitoring point 22 in the real-time contour line are compared with the coordinates of each monitoring point 22 in the original contour line, so that the actual change values of the data such as the displacement, the altitude elevation and the like of each monitoring point 22 can be obtained.
In order to better implement the present invention, as a further optimization of the above technical solution, the central coordinate of the original contour line central coordinate point is the central coordinate of the coordinate control point 21.
In this embodiment, as shown in fig. 5, the coordinate control point 21 is set as the center coordinate of the original contour line, which is advantageous in that the coordinate control point 21 is a permanent control point, and both the coordinate data and the elevation data are not changed, so that the coordinate data of the pit bottom of the foundation pit 1 of the constructional engineering can be fused into the geodetic coordinate system, and further the coordinate data, the elevation data and the like of each monitoring point 22 in the foundation pit 1 of the constructional engineering have accurate reference values, and finally the change values of the data such as the displacement data, the elevation data and the like of the monitored foundation pit 1 of the constructional engineering can be accurately monitored.
As a further optimization of the above technical solution, the altitude difference between two adjacent original contour lines and the altitude difference between two adjacent real-time contour lines are both 1mm to 5mm, and the altitude difference between two adjacent original contour lines is the same as the altitude difference between two adjacent real-time contour lines.
In this embodiment, the difference between the altitude heights of the two adjacent original contour lines and the difference between the altitude heights of the two adjacent real-time contour lines are both set to be within a range of 1mm to 5mm, which has the advantages that not only the purpose of digitally monitoring the foundation pit 1 of the construction engineering can be realized, but also the monitoring process of the foundation pit 1 of the construction engineering can be realized without increasing too much workload for technicians. As a preferred embodiment, in this embodiment, the elevation difference between two adjacent original contour lines and the elevation difference between two adjacent real-time contour lines are both set to be 1mm, which is advantageous in that the elevation change value of the foundation pit 1 in the construction engineering can be changed by taking 1mm as a difference value.
As a further optimization of the above technical solution, the navigation unmanned aerial vehicle 31 includes a body 311 in communication connection with the central processing unit 33, the body 311 is provided with a navigation module 312 and a flight control module, an input end of the navigation module 312 is in communication connection with the central processing unit 33, and an output end is in communication connection with an input end of the flight control module; the flight control module has at least two outputs, and each output of the flight control module controls one monitoring unmanned aerial vehicle 32.
In this embodiment, as shown in fig. 5, the advantage of installing the navigation module 312 and the flight control module on the body 311 is that after the navigation drone 31 is released, the navigation drone 31 can be controlled by using the flight control system, and when the monitoring drones 32 are controlled and monitored, the monitoring drones 32 can be controlled and monitored by using the navigation module 312 and the flight control module on the navigation drone 31. The detailed technical scheme of navigation and flight control of the auxiliary unmanned aerial vehicle by the main unmanned aerial vehicle is disclosed in detail in the unmanned aerial vehicle 3 surveying and mapping method based on the AGV matrix disclosed in the Chinese patent CN201710822794.3, so that the process is not repeated one by one in the invention, and meanwhile, the surveying and mapping method under the cooperation of the main unmanned aerial vehicle and the auxiliary unmanned aerial vehicle is also disclosed in detail in the invention.
It should be noted that, as a preferred embodiment, in this embodiment, the communication protocol adopted by the navigation module 312 and the flight control module is mavrink.
The method for monitoring the foundation pit of the building engineering specifically comprises the following steps:
s1, measuring and pre-embedding the coordinate control point 21 near the foundation pit 1 of the building engineering to be built, and determining the boundary line of the foundation pit 1 of the building engineering to be built by using the measuring instrument and combining the coordinate control point 21 and a design drawing;
in this embodiment, as shown in fig. 2, in step S1, the specific work flow of pre-burying the coordinate control point 21 and determining the boundary line of the foundation pit 1 of the architectural engineering is to obtain the permanent control point coordinate closest to the foundation pit 1 of the architectural engineering to be built by the design unit, introduce the permanent control point coordinate to the vicinity of the foundation pit 1 of the architectural engineering to be built by using an instrument such as a GPS, pre-bury the coordinate control point 21 in the vicinity of the foundation pit 1 of the architectural engineering to be built, loft the foundation pit 1 of the architectural engineering to be built by using the coordinate control point 21 as a coordinate center, and determine the boundary line of the foundation pit 1 of the architectural engineering to be built, and loft the foundation pit 1 of the architectural engineering in the design drawing to the designated area by this method.
S2, constructing the building engineering foundation pit 1 on the boundary line of the building engineering foundation pit 1 by using a protective structure and excavating the foundation pit in the boundary line;
in step S2, when the protective structure of the construction engineering foundation pit 1 is constructed, firstly, the protective structure is constructed, and the monitoring points 22 are embedded in the already constructed protective structure, after the embedding of the monitoring points 22 is completed, data acquisition is performed on each monitoring point 22 by using a measuring instrument, then, foundation pit excavation is performed, and after the foundation pit excavation construction is completed, the bottom of the foundation pit needs to be leveled, and the leveling aims to make the elevation change value of the bottom of the foundation pit smaller, so that the foundation pit can be monitored in the later period.
It should be noted that, as a preferred embodiment, in the present embodiment, when the monitoring points 22 are pre-buried, the encryption points 222 need to be disposed between the auxiliary control points 221, and the purpose of disposing the auxiliary control points 221 is to enable the generated original contour lines to be more accurate through the disposed auxiliary control points 221, and the more the number of the encryption points 222 is, the more accurate the generated original contour lines are, the more accurate the monitored data is.
S3, hardening the bottom of the foundation pit, pre-burying the monitoring point 2 and acquiring 22-bit original data of each monitoring point, generating original contour lines by using the acquired original data, and numbering the original contour lines in sequence;
s4, releasing the unmanned aerial vehicle set 3, sequentially monitoring the positions of the monitoring points 22 by the monitoring unmanned aerial vehicles 32 in the unmanned aerial vehicle set 3, transmitting data measured by the monitoring unmanned aerial vehicles 32 to a central processor by the navigation module 312 on the navigation unmanned aerial vehicle 31, generating real-time contour lines, fitting and comparing the real-time contour lines with original contour lines, and obtaining data change values of the monitoring points 22.
As a further optimization of the above technical solution, the step S3 mainly includes the following steps:
s31, hardening the bottom of the foundation pit by using C15-C30 concrete;
it should be noted that, as a preferred embodiment, in this embodiment, the process of using concrete to harden the bottom of the foundation pit includes first performing bed course pouring, laying a reinforcing mesh, pouring a hardened layer, and performing elevation control on the elevation of the top of the hardened layer by using a measuring instrument, and the advantage of using this construction sequence is that by this construction method, the elevation of the bottom of the foundation pit of the present invention has a smaller difference, which facilitates monitoring the elevation of the bottom of the foundation pit at a later stage. In the embodiment, the concrete adopted at the bottom of the foundation pit is the cushion layer C15 or C20 and the hardened layer C25 or C30 respectively, and the two types of concrete have the advantage of reducing the elevation change value caused by the expansion and collapse of the concrete.
S32, determining each auxiliary control point 221 and monitoring point 22 at the bottom of the hardened construction engineering foundation pit 1 by using a measuring instrument, and pre-burying reinforcing steel bar heads on each auxiliary control point 221 and each encryption point 222;
it should be noted that, as a preferred embodiment, in this embodiment, when the steel bar heads are embedded, the embedded steel bar heads need to be sequentially numbered, and the advantage of sequential numbering is that the unmanned aerial vehicle set 3 can directionally monitor each monitoring point 22 in the monitoring process through sequential numbering, thereby effectively avoiding the defects of repeated monitoring or missed detection and the like.
S33, collecting the original data of each auxiliary control point 221 and each encryption point 222;
s34, importing the original data into the central processing unit 33 to be integrated and generate an original contour line;
and S35, numbering the original contour lines in sequence according to the altitude difference sequence change values.
It is worth noting that, as a preferred embodiment, in this embodiment, the original contour lines are sequentially numbered according to the altitude difference sequential variation values, which has an advantage that when data are distributed to the monitoring unmanned aerial vehicles 32, a certain original contour line or an original contour line group in a specific area can be distributed to the designated monitoring unmanned aerial vehicle 32, so that the accuracy of monitoring data acquisition is effectively improved. It should be explicitly stated that, as a preferred embodiment, in this embodiment, the original contour numbering method may be performed in two ways, namely, low-to-high or high-to-bottom numbering according to altitude and elevation.
As a further optimization of the above technical solution, the S4 mainly includes the following steps:
s41, after the navigation unmanned aerial vehicle 31 is controlled by the flight control system to fly to the designated height of the designated area, the original contour lines covering the data information of the monitoring point 2 are transmitted to the navigation module 312;
s42, the navigation module 312 distributes the numbered original contour lines to the corresponding monitoring drones 32 through each output end of the flight control module;
s43, the flight control module controls the monitoring unmanned aerial vehicle 32 to monitor each monitoring point 22 bit on the designated original contour line through the signal output end of the flight control module, and transmits the monitoring data to the navigation module 312;
s44, the navigation module 312 transmits the received monitoring data to the central processing unit 33;
s45, the central processing unit 33 integrates the monitoring data to generate a real-time contour line;
and S46, the central processing unit 33 performs fitting comparison on the real-time contour line and the original contour line to obtain data change values such as displacement, altitude and the like of each monitoring point 22.
It should be noted that, as a preferred embodiment, in order to more clearly and clearly illustrate the method for the unmanned aerial vehicle 3 to monitor each monitoring point 22 in the present invention, in this embodiment, the unmanned aerial vehicle 3 has at least two monitoring unmanned aerial vehicles 32, and the monitoring unmanned aerial vehicles 32 are uniformly distributed around the navigation unmanned aerial vehicle 31 in a circumferential array.
According to the scheme, a plurality of monitoring point positions are pre-buried in a ground plane coordinate system of a foundation pit of a construction project, the monitoring point positions comprise at least one coordinate control point and a plurality of monitoring points, original contour lines are drawn and formed on the basis of the monitoring points located at the same elevation, each original contour line is defined as a measurement group, and each measurement group comprises at least two auxiliary control points and a plurality of encryption points; monitoring and data acquisition are carried out on each monitoring point in each measurement group by using an unmanned aerial vehicle group, the acquired data are integrated by using a central processing unit to generate a real-time contour line, and the real-time contour line and an original contour line are fitted and compared to obtain a displacement and altitude elevation change value of the construction foundation pit engineering, so that the aim of digitally monitoring the construction foundation pit is fulfilled.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A method for monitoring a foundation pit of constructional engineering is characterized by comprising the following steps: embedding a plurality of monitoring point positions (2) in a geodetic plane coordinate system of a foundation pit (1) of a construction project, wherein each monitoring point position (2) comprises at least one coordinate control point (21) and a plurality of monitoring points (22), drawing and forming original contour lines on the basis of each monitoring point (22) located at the same elevation, defining each original contour line as a measurement group, and each measurement group comprises at least two auxiliary control points (221) and a plurality of encryption points (222);
monitoring each measurement group by using a surveying and mapping unmanned aerial vehicle set (3); the unmanned aerial vehicle set (3) transmits monitoring data to a central processing unit (33) through wireless communication to be integrated to obtain a real-time contour line, the real-time contour line and an original contour line are matched and compared to obtain the latest data value of each point in the foundation pit (1) of the constructional engineering, and the displacement and the elevation change value of the elevation of the foundation pit (1) of the constructional engineering are obtained according to the matching and comparing data;
unmanned aerial vehicle group (3) are used for monitoring unmanned aerial vehicle (32) including navigation unmanned aerial vehicle (31) and two at least simultaneously, navigation unmanned aerial vehicle (31) are connected with flight control system communication through central processing unit (33), monitoring unmanned aerial vehicle (32) are connected with navigation unmanned aerial vehicle (31) communication, each monitoring unmanned aerial vehicle (32) are measured each monitoring point (22) in each measurement group in proper order.
2. A method for construction engineering pit monitoring according to claim 1, characterized in that: the center coordinates of the center coordinate points of the original contour lines are the center coordinates of the coordinate control points (21).
3. A method for construction engineering pit monitoring according to claim 2, characterized in that: the altitude height difference between two adjacent original contour lines and the altitude height difference between two adjacent real-time contour lines are both 1mm-5mm, and the altitude height difference between two adjacent original contour lines is the same as the altitude height difference between two adjacent real-time contour lines.
4. A method for construction engineering pit monitoring according to claim 3, characterized in that: the navigation unmanned aerial vehicle (31) comprises a machine body (311) in communication connection with the central processing unit (33), a navigation module (312) and a flight control module are arranged on the machine body (311), the input end of the navigation module (312) is in communication connection with the central processing unit (33), and the output end of the navigation unmanned aerial vehicle is in communication connection with the input end of the flight control module; the flight control module is provided with at least two output ends, and each output end of the flight control module respectively controls one monitoring unmanned aerial vehicle (32).
5. A method for construction engineering pit monitoring according to claim 4, characterized in that: the method mainly comprises the following steps:
s1, measuring and pre-burying a coordinate control point (21) near the foundation pit (1) of the building engineering to be built, and determining the boundary line of the foundation pit (1) of the building engineering to be built by using the measuring instrument in combination with the coordinate control point (21) and a design drawing;
s2, constructing the building engineering foundation pit (1) on the boundary line of the building engineering foundation pit (1) by using a protective structure and excavating the foundation pit in the boundary line;
s3, hardening the bottom of the foundation pit, embedding the monitoring points (2) and acquiring original data of each monitoring point (22), generating original contour lines by using the acquired original data, and numbering the original contour lines in sequence;
s4, releasing the unmanned aerial vehicle set (3), sequentially monitoring the positions of the monitoring points (22) by using the monitoring unmanned aerial vehicle (32) in the unmanned aerial vehicle set (3), transmitting data measured by each monitoring unmanned aerial vehicle (32) to a central processor by using a navigation module (312) on the navigation unmanned aerial vehicle (31), generating real-time contour lines, and fitting and comparing the real-time contour lines with original contour lines to obtain data change values of the monitoring points (22).
6. A method for construction engineering pit monitoring according to claim 5, characterized in that: the step S3 mainly includes the following steps:
s31, hardening the bottom of the foundation pit by using C15-C30 concrete;
s32, determining each auxiliary control point (221) and a monitoring point (22) at the bottom of the hardened construction engineering foundation pit (1) by using a measuring instrument, and pre-burying reinforcing steel bar heads on each auxiliary control point (221) and each encryption point (222);
s33, collecting the original data of each auxiliary control point (221) and each encryption point (222);
s34, importing the original data into a central processing unit (33) to be integrated and generate an original contour line;
and S35, numbering the original contour lines in sequence according to the altitude difference sequence change values.
7. A method for construction engineering pit monitoring according to claim 5, characterized in that: the S4 mainly includes the following steps:
s41, after the navigation unmanned aerial vehicle (31) is controlled by the flight control system to fly to the designated height of the designated area, transmitting each original contour line covering the data information of the monitoring point (2) to the navigation module (312);
s42, the navigation module (312) distributes the numbered original contour lines to the corresponding monitoring unmanned aerial vehicles (32) through the output ends of the flight control module;
s43, the flight control module controls the monitoring unmanned aerial vehicle (32) to monitor each monitoring point (22) on the designated original contour line through the signal output end of the flight control module, and transmits the monitoring data to the navigation module (312);
s44, the navigation module (312) transmits the received monitoring data to a central processor (33);
s45, the central processing unit (33) integrates the monitoring data to generate a real-time contour line;
and S46, the central processing unit (33) performs fitting comparison on the real-time contour line and the original contour line to obtain data change values of displacement, altitude range and the like of each monitoring point (22).
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