Foundation pit and surrounding structure deformation monitoring method based on BIM combined with GIS technology

Abstract

The invention relates to a foundation pit and surrounding structure deformation monitoring method based on the combination of BIM and GIS technology, and the method comprises the steps: building a foundation pit BIM model according to the structure data information of a foundation pit; scanning surrounding structures of the foundation pit by using an unmanned aerial vehicle, and establishing an oblique photography model; a foundation pit BIM model and a peripheral structure oblique photography model are imported into a GIS system; monitoring frequency, observation points and observation datum points are determined according to the conditions such as the depth and size of the foundation pit and the meteorological environment; according to the visual field range of the observation datum point, a monitoring object is installed at a monitoring point position, and a monitoring base station is arranged at the datum point to form an on-site monitoring module; the cloud server analyzes and processes the change data through the monitoring change data collected by the monitoring system, and reflects the change data on the terminal module in real time, namely a foundation pit BIM model and an oblique photography model. The system has the advantages that deformation conditions such as settlement and the like of the foundation pit and surrounding buildings can be displayed more visually through the terminal display module based on the BIM + GIS technology.

Description

Technical Field

[0001] The present invention relates to the technical field of foundation pit construction monitoring, and in particular to a method for monitoring deformation of a foundation pit and surrounding structures based on BIM combined with GIS technology. Background Art

[0002] With the continuous advancement of urbanization in my country, higher requirements have been put forward for the utilization rate of urban space. Overpasses, underpasses, subways, high-rise buildings, etc. are increasing day by day. These projects more or less involve deep foundation pit construction. The existing foundation pit monitoring technology focuses on the monitoring of the deformation of the foundation pit support structure, while ignoring the monitoring of the foundation pit wall. However, the stress on the foundation pit wall is relatively complex, and it is easy to have bulges, seepage, cross-sections, etc. during the construction process. Inadequate monitoring will cause serious consequences; and the existing foundation pit monitoring generally adopts manual monitoring of the local or key parts of the foundation pit support structure through the layout of monitoring points, which is not only time-consuming and labor-intensive, but also may lead to incomplete monitoring data, delayed information processing and large errors, and untimely feedback, which often cause major safety accidents. Summary of the invention

[0003] The purpose of the present invention is to provide a deformation monitoring method for foundation pits and surrounding structures based on BIM combined with GIS technology in response to the deficiencies of the above-mentioned prior art. Through a cloud server, monitoring data can be collected and analyzed in real time, and automatic collection, uploading, processing and analysis of monitoring data can be realized, so as to achieve automatic alarm of early warning values ​​and realize the purpose of "early detection, early warning and early treatment". At the same time, the deformation of the foundation pit can be grasped in real time through the cloud server and the terminal display module, and emergencies can be dealt with in time, reducing manual comparative analysis, shortening the monitoring data processing time, and greatly improving efficiency.

[0004] The purpose of the present invention is achieved by the following technical solutions: A method for monitoring deformation of a foundation pit and surrounding structures based on BIM combined with GIS technology, characterized in that: a foundation pit BIM model is established according to structural data information of the foundation pit; Using a drone to scan the surrounding structures of the foundation pit to establish an oblique photography model; Import the foundation pit BIM model and the oblique photography model of the surrounding structures into the GIS system; Determine the monitoring frequency, observation points and observation reference points according to the depth, size and meteorological environment of the foundation pit; According to the visual range of the observation reference point, monitoring objects are installed at the monitoring point, and monitoring base stations are set at the reference point to form a field monitoring module; The cloud server collects the monitoring change data through the monitoring system, analyzes and processes the change data, and reflects the change data in real time on the terminal module, that is, the foundation pit BIM model and the oblique photography model.

[0005] A visualization module is built into the BIM module to form a visualization deformation thermal map, a deformation curve map, and a deformation dynamic visualization of the foundation pit retaining structure and the pit wall; Among them, the deformation heat map is visualized on the BIM model in different colors according to the size of the deformation, the deformation curve diagram is visualized on the BIM model in the form of a curve, and the deformation dynamic visualization is visualized on the BIM model in the form of an animation.

[0006] The monitoring modules include: monitoring of horizontal and vertical displacements of the slope (pile) top and surrounding crown beams; monitoring of vertical displacements of surrounding roads and bridge columns; monitoring of foundation pit support axial forces; monitoring of groundwater levels; and monitoring of deep horizontal displacements of retaining piles.

[0007] If the change value collected by the detection system reaches or exceeds the set warning threshold, the warning system will immediately initiate an emergency response and issue a warning message.

[0008] The advantages of the present invention are as follows: through the terminal display module based on BIM+GIS technology, the deformation of the foundation pit and surrounding buildings such as settlement can be displayed more intuitively; the monitoring data can be analyzed and processed in real time through the cloud server to improve the timeliness of the monitoring data; the on-site monitoring module controlled by the program can greatly reduce the labor intensity and labor cost; the early warning module can start the emergency procedure more efficiently, and the emergency situation can be handled in time, reducing the error rate of human operation and greatly improving the efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the composition of the monitoring system module in the present invention; Figure 2 It is an implementation flow chart of the present invention. Implementation

[0010] The features of the present invention and other related features are further described in detail below through embodiments in conjunction with the accompanying drawings to facilitate understanding by those skilled in the art: Example: Figure 1 As shown, this embodiment provides a monitoring system for deformation of foundation pit and surrounding environment based on BIM+GIS, including: On-site monitoring module (responsible for data collection), cloud server (responsible for data processing and analysis); terminal module (responsible for real-time display of changes in foundation pits and surrounding structures); early warning module (automatically issues an alarm message and initiates emergency measures when the warning threshold is reached).

[0011] like Figure 2 As shown, this embodiment provides a method for monitoring deformation of a foundation pit and surrounding environment based on BIM+GIS, and the process includes: According to the structural data information of the foundation pit, a foundation pit BIM model is established, and a visualization module is built into the BIM module to form a visualization deformation heat map, a deformation curve map, and a deformation dynamic visualization of the foundation pit retaining structure and the pit wall; the deformation heat map is visualized on the BIM model in different colors according to the size of the deformation variable, the deformation curve map is a visualization of the deformation process in the form of a curve on the BIM model, and the deformation dynamic visualization is a visualization of the deformation process in the form of an animation on the BIM model; Using a drone to scan the surrounding structures of the foundation pit to establish an oblique photography model; Import the foundation pit BIM model and the oblique photography model of the surrounding structures into the GIS system; Determine the monitoring frequency, observation points and observation reference points according to the depth, size and meteorological environment of the foundation pit; According to the visual range of the observation benchmark point, monitoring objects are installed at the monitoring point, and monitoring base stations are set up at the benchmark point to form a field monitoring module; the monitoring module includes: ① horizontal and vertical displacement monitoring of the slope (pile) top and surrounding crown beams; ② vertical displacement monitoring of surrounding roads and bridge columns; ③ foundation pit support axial force monitoring; ④ groundwater level monitoring; ⑤ monitoring of deep horizontal displacement of retaining piles; The cloud server collects the monitoring change data through the monitoring system, analyzes and processes the change data, and reflects the change data in real time on the terminal module, that is, the foundation pit BIM model and the oblique photography model.

[0012] If the change value reaches or exceeds the set warning threshold, the warning system will immediately initiate an emergency response and issue a warning message.

[0013] Although the above embodiments have described in detail the concepts and embodiments of the present invention with reference to the accompanying drawings, ordinary technicians in this field can recognize that various improvements and changes can still be made to the present invention without departing from the scope of the claims, so they are not described one by one here.

Claims

1. A method for monitoring deformation of foundation pits and surrounding structures based on BIM combined with GIS technology, characterized in that: Establishing a foundation pit BIM model according to the structural data information of the foundation pit; Using a drone to scan the surrounding structures of the foundation pit to establish an oblique photography model; Import the foundation pit BIM model and the oblique photography model of the surrounding structures into the GIS system; Determine the monitoring frequency, observation points and observation reference points according to the depth, size and meteorological environment of the foundation pit; According to the visual range of the observation reference point, monitoring objects are installed at the monitoring point, and monitoring base stations are set at the reference point to form a field monitoring module; The cloud server collects the monitoring change data through the monitoring system, analyzes and processes the change data, and reflects the change data in real time on the terminal module, that is, the foundation pit BIM model and the oblique photography model.

2. According to claim 1, a method for monitoring deformation of foundation pits and surrounding structures based on BIM combined with GIS technology, characterized in that: A visualization module is built into the BIM module to form a visualization deformation thermal map, a deformation curve map, and a deformation dynamic visualization of the foundation pit retaining structure and the pit wall; Among them, the deformation heat map is visualized on the BIM model in different colors according to the size of the deformation, the deformation curve diagram is visualized on the BIM model in the form of a curve, and the deformation dynamic visualization is visualized on the BIM model in the form of an animation.

3. The method for monitoring deformation of foundation pits and surrounding structures based on BIM and GIS technology according to claim 1 is characterized by: The monitoring modules include: monitoring of horizontal and vertical displacements of the slope (pile) top and surrounding crown beams; monitoring of vertical displacements of surrounding roads and bridge columns; monitoring of foundation pit support axial forces; monitoring of groundwater levels; and monitoring of deep horizontal displacements of retaining piles.

4. The method for monitoring deformation of foundation pits and surrounding structures based on BIM and GIS technology according to claim 1 is characterized in that: If the change value collected by the detection system reaches or exceeds the set warning threshold, the warning system will immediately initiate an emergency response and issue a warning message.

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