CN-117036294-B - Foundation pit engineering monitoring method and system based on three-dimensional point cloud and electronic equipment

CN117036294BCN 117036294 BCN117036294 BCN 117036294BCN-117036294-B

Abstract

The invention relates to the technical field of foundation pit engineering monitoring and provides a foundation pit engineering monitoring method, a system and electronic equipment based on three-dimensional point cloud, which comprise the steps of generating an ith-period original three-dimensional point cloud suitable for representing a foundation pit construction site according to an image set required by an ith monitoring period, processing the ith-period original three-dimensional point cloud into a foundation pit scene point cloud model, checking whether at least one local heap area is distributed outside the local foundation pit area, if so, carrying out risk level analysis on at least one local heap area according to the local foundation pit area, and if not, endowing a corresponding foundation pit scene point cloud model with a preset safety index, thereby overcoming the technical defect that the existing method for automatically monitoring the foundation pit engineering based on the three-dimensional point cloud ignores the risk of the external heap of the foundation pit.

Inventors

GONG ZHIQUN
YANG SHITING
ZHANG DONGLIANG
LU YENING
GAO SHAOFEI

Assignees

中国建设基础设施有限公司

Dates

Publication Date: 20260508
Application Date: 20230814

Claims (8)

1. The foundation pit engineering monitoring method based on the three-dimensional point cloud is characterized by comprising the following steps of: when an image set required by finishing an ith monitoring period is stored in a preset database with periodical updating property, generating an ith-period original three-dimensional point cloud suitable for representing a foundation pit construction site according to the image set, wherein i represents a positive integer accumulated from 1; preprocessing the i-th-period original three-dimensional point cloud to obtain a foundation pit scene point cloud model bound with the i-th monitoring period; checking whether at least one current pile area is distributed outside the current foundation pit area in the corresponding foundation pit scene point cloud model; if yes, carrying out risk level identification on at least one of the current-period stacking areas according to the current-period foundation pit area; If not, giving a preset safety index to the corresponding foundation pit scene point cloud model, wherein the preset safety index is 0 or true or other forms which can be distinguished from the risk level obtained through identification; checking whether at least one current pile area is distributed outside the current foundation pit area or not in the corresponding foundation pit scene point cloud model comprises the following steps: Selecting the foundation pit scene point cloud model subjected to point cloud semantic or panoramic segmentation according to a preset tag table, wherein the preset tag table comprises foundation pit tags and at least one stacking object tag; when the current foundation pit area matched with the foundation pit label is selected, identifying a pit mouth contour aiming at the selected current foundation pit area; when the current stacking area matched with any stacking object label is selected, identifying a stacking object outline aiming at the selected current stacking object area, and detecting the position relationship between the stacking object outline and the pithead outline; and if the pit mouth outline is separated from at least one pile outline, confirming that the auditing conclusion is yes, otherwise, confirming that the auditing conclusion is no.
2. The three-dimensional point cloud-based pit engineering monitoring method of claim 1, wherein detecting a positional relationship between the pile outline and the pithead outline comprises: projecting the pile outline on a plane where the pit outline is located so as to form a corresponding projection outline; Detecting intersection points of the projection profile and the pithead profile, if the number of the intersection points is zero, selecting any point on the projection profile as a rechecking point, otherwise, confirming that the pithead profile is intersected with the corresponding pile profile; and detecting whether the rechecking point is positioned in the pit outline, if so, confirming that the pit outline surrounds the periphery of the corresponding pile outline, otherwise, confirming that the pit outline and the pile outline are separated.
3. The three-dimensional point cloud-based pit engineering monitoring method of claim 1, wherein performing risk level identification on at least one of the current-stage pile areas according to the current-stage pit area comprises: Aiming at the pile outline profile owned by any current pile area, respectively detecting the nearest distance and the maximum height difference between the pile outline profile and the pit outline profile owned by the current foundation pit area; If the nearest distance is larger than a preset safety distance and the maximum height difference is smaller than or equal to a preset safety height, determining a corresponding risk level as a first level; if the nearest distance is greater than the preset safety distance and the maximum height difference is greater than the preset safety height, determining the risk level as a second level; if the nearest distance is smaller than or equal to the preset safe distance, detecting a pile volume for the corresponding current pile area; if the pile volume is less than or equal to a pre-designed safety volume and the maximum height difference is less than or equal to the pre-designed safety height, determining the risk level as three levels; if the pile volume is less than or equal to the preset safety volume and the maximum height difference is greater than the preset safety height, determining the risk level as a fourth level; if the stack volume is greater than the preset safety volume and the maximum height difference is less than or equal to the preset safety height, determining the risk level as five levels; if the stack volume is greater than the preset safety volume and the maximum height difference is greater than the preset safety height, the risk level is determined to be six.
4. The method for monitoring the foundation pit engineering based on the three-dimensional point cloud according to any one of claims 1 to 3, further comprising detecting the volume ratio between the foundation pit area of the present period and the preset foundation pit shape as the corresponding foundation pit excavation progress.
5. Foundation pit engineering monitoring system based on three-dimensional point cloud, characterized by comprising: the three-dimensional point cloud generation module is used for generating an i-phase primary three-dimensional point cloud suitable for representing a foundation pit construction site according to an image set required by finishing an i-th monitoring period when the image set is stored in a preset database with periodical updating properties, wherein i represents a positive integer accumulated from 1; The point cloud scene reconstruction module is used for preprocessing the i-phase original three-dimensional point cloud to obtain a foundation pit scene point cloud model bound with the i-phase monitoring period; The pile risk inspection module is used for inspecting whether at least one pile area in the corresponding foundation pit scene point cloud model is distributed outside the foundation pit area in the present period, if yes, carrying out risk level identification on at least one pile area in the present period according to the foundation pit area in the present period, and if not, giving a preset safety index to the corresponding foundation pit scene point cloud model, wherein the preset safety index is 0 or true or other forms which can be distinguished from the risk level obtained through identification; the stack risk inspection module is specifically configured to: Selecting the foundation pit scene point cloud model subjected to point cloud semantic or panoramic segmentation according to a preset tag table, wherein the preset tag table comprises foundation pit tags and at least one stacking object tag; when the current foundation pit area matched with the foundation pit label is selected, identifying a pit mouth contour aiming at the selected current foundation pit area; when the current stacking area matched with any stacking object label is selected, identifying a stacking object outline aiming at the selected current stacking object area, and detecting the position relationship between the stacking object outline and the pithead outline; and if the pit mouth outline is separated from at least one pile outline, confirming that the auditing conclusion is yes, otherwise, confirming that the auditing conclusion is no.
6. The three-dimensional point cloud based pit engineering monitoring system of claim 5, wherein the pile risk inspection module is specifically configured to: Detecting the nearest distance and the maximum height difference between the pile outline owned by any current pile area and the pit outline owned by the current foundation pit area respectively; If the nearest distance is larger than a preset safety distance and the maximum height difference is smaller than or equal to a preset safety height, determining a corresponding risk level as a first level; if the nearest distance is greater than the preset safety distance and the maximum height difference is greater than the preset safety height, determining the risk level as a second level; if the nearest distance is smaller than or equal to the preset safe distance, detecting a pile volume for the corresponding current pile area; if the pile volume is less than or equal to a pre-designed safety volume and the maximum height difference is less than or equal to the pre-designed safety height, determining the risk level as three levels; if the pile volume is less than or equal to the preset safety volume and the maximum height difference is greater than the preset safety height, determining the risk level as a fourth level; if the stack volume is greater than the preset safety volume and the maximum height difference is less than or equal to the preset safety height, determining the risk level as five levels; if the stack volume is greater than the preset safety volume and the maximum height difference is greater than the preset safety height, the risk level is determined to be six.
7. The three-dimensional point cloud based pit engineering monitoring system of any one of claims 5 to 6, further comprising: And the pit digging progress detection module is used for detecting the volume ratio between the foundation pit area in the current period and the preset foundation pit shape so as to serve as the corresponding foundation pit digging progress.
8. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the three-dimensional point cloud based pit engineering monitoring method according to any one of claims 1-4 when executing the computer program.

Description

Foundation pit engineering monitoring method and system based on three-dimensional point cloud and electronic equipment Technical Field The invention relates to the technical field of foundation pit engineering monitoring, in particular to a foundation pit engineering monitoring method, system and electronic equipment based on three-dimensional point cloud. Background The foundation pit engineering is systematic engineering integrating geological engineering, geotechnical engineering, structural engineering and geotechnical testing technology, and mainly comprises engineering investigation, supporting structure design and construction, earthwork excavation and backfill, groundwater control, informationized construction, surrounding environment protection and the like. The foundation pit engineering is influenced by geological conditions, surrounding environments and other factors, risks are large in construction and service periods, various construction specifications provide various construction engineering safety requirements for the foundation pit engineering, for example, in the building foundation pit engineering monitoring technical standard, main technical contents such as monitoring projects, monitoring methods, precision requirements and monitoring frequency are formulated, instrument monitoring projects such as side slope displacement/soil pressure, pit bottom bulge and underground water level are provided, inspection projects such as whether a supporting structure is cracked or not, whether the ground around the foundation pit is overloaded and the stacking change condition of the adjacent foundation pit are provided, in the building foundation engineering construction specification, the construction site material stacking is required to meet the design load control requirement, the temporary stacking soil in the site reasonably determines the plane range and the height of the stacking soil, the stacking height is larger than the design overload requirements, the foundation pit safety problem is caused, the distance from the stacking soil to the pit edge is generally not smaller than 3m or not smaller than 5m, and the like. However, construction manager periodically patrols foundation pit construction site to prevent and control risk of piled objects (such as earthwork and/or building materials), and has various disadvantages of time and effort consumption, untimely early warning, high personnel risk and the like, which are more prominent in severe weather such as heavy rain and earthquake, and the automated foundation pit engineering monitoring technology focuses on foundation pit deformation, earth quantity of pit digging, collapse water seepage and the like, and the automated foundation pit engineering monitoring technology focusing on piled object risk is to be provided. Disclosure of Invention The invention aims to solve the technical problems in the related art to at least a certain extent, and provides a foundation pit engineering monitoring method, a system and electronic equipment based on three-dimensional point cloud. In a first aspect, the present invention provides a foundation pit engineering monitoring method based on three-dimensional point cloud, including: when an image set required by finishing an ith monitoring period is stored in a preset database with periodical updating property, generating an ith-period original three-dimensional point cloud suitable for representing a foundation pit construction site according to the image set, wherein i represents a positive integer accumulated from 1; preprocessing the i-th-period original three-dimensional point cloud to obtain a foundation pit scene point cloud model bound with the i-th monitoring period; checking whether at least one current pile area is distributed outside the current foundation pit area in the corresponding foundation pit scene point cloud model; if yes, carrying out risk level identification on at least one of the current-period stacking areas according to the current-period foundation pit area; If not, the preset safety index is given to the corresponding foundation pit scene point cloud model. In a second aspect, the present invention provides a foundation pit engineering monitoring system based on three-dimensional point cloud, including: the three-dimensional point cloud generation module is used for generating an i-phase primary three-dimensional point cloud suitable for representing a foundation pit construction site according to an image set required by finishing an i-th monitoring period when the image set is stored in a preset database with periodical updating properties, wherein i represents a positive integer accumulated from 1; The point cloud scene reconstruction module is used for preprocessing the i-phase original three-dimensional point cloud to obtain a foundation pit scene point cloud model bound with the i-phase monitoring period; And the pile risk inspection module is used for inspecting whethe