CN114781156B - BIM-based channel maintenance measure analysis method - Google Patents
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Abstract
A method for analyzing a channel maintenance measure based on BIM belongs to the field of engineering maintenance and management. On the basis of an underwater topography measurement result after a channel is subjected to flood front flood in hydrological years, a B I M technology is used for establishing a riverbed curved surface model, analyzing the evolution trend of a riverbed, accurately calculating a erosion-deposition part, further integrating channel design data and the current situation of the riverbed to analyze the current situation scale and maintenance measures of the channel, providing an accurate and quantitative analysis means, reducing the artificial interference in manual CAD (computer-aided design) mapping, and improving the working efficiency and the reliability of the maintenance scheme in channel maintenance measure analysis.
Description
Technical Field
The invention particularly relates to a BIM (Building Information Modeling) based channel and channel maintenance measure analysis process and method
Background
The inland waterway maintenance is a necessary link for protecting the smoothness of the inland waterway, improving the level of the waterway and the service level and providing good and safe navigation conditions for ships. In order to ensure navigation safety, relevant specifications of channel maintenance require that regular underwater topography monitoring and tracking analysis are carried out on key channel sections of the channel, so that the water depth change trend, the riverbed change trend and current channel indexes can be comprehensively mastered, and reference is provided for channel maintenance measures.
At present, the technical means of channel maintenance and analysis mainly comprises CAD (computer-aided design) drawing, and the informatization application level is relatively laggard. In view of the complexity of water level change in hydrology, the channel maintenance navigation width and the efficiency of water depth analysis are not enough, the timeliness and economy of treatment on the channel obstacle section are influenced to a certain extent, and the navigation safety of a heavy ship in the channel cannot be guaranteed. The maintenance stage of the navigation channel is used as an important component of the whole life cycle of the project, and a bottleneck exists in the BIM information intercommunication in the design and construction stages. With the economic development and the increase of the shipping volume, the technical level of the channel maintenance is difficult to adapt to the requirement of the shipping development.
Disclosure of Invention
In order to overcome the defects of the existing channel maintenance measure analysis mode, the invention provides a BIM-based channel maintenance measure analysis method. On the basis of an underwater topography measurement result after a channel is subjected to flood front flood in hydrological years, a BIM technology is used for establishing a riverbed curved surface model, analyzing the evolution trend of a riverbed, accurately calculating a erosion and deposition part, further integrating channel design data and the current situation of the riverbed to analyze the current situation scale and maintenance measures of the channel, an accurate and quantitative analysis means is provided, the artificial interference in manual CAD (computer-aided design) mapping is reduced, and the working efficiency and the reliability of the maintenance scheme in channel maintenance measure analysis are improved.
The technical problem to be solved by the invention is realized by adopting the following technical scheme:
the BIM-based channel maintenance measure analysis method comprises the following steps:
step 1: calculating flood, month of dry season and characteristic water level in hydrological years according to hydrological statistical data in a channel area to be researched;
step 2: according to the relevant regulation requirements of channel maintenance. Carrying out underwater topography measurement operation after flood front flood on a channel research segment, and forming an underwater topography internal work result;
and step 3: establishing a BIM (building information modeling) curved surface model S1 of the underwater terrain before the flood and a BIM curved surface model S2 of the underwater terrain after the flood according to the underwater terrain interior achievement;
and 4, step 4: building a BIM volume curved surface model V1 by using the BIM curved surface models S1 and S2 of the underwater topography before and after a flood;
and 5: carrying out erosion and deposition calculation and river bed evolution analysis according to the characteristics of the curved surface models S1, S2 and V1;
step 6: according to the channel design data, establishing a channel maintenance grade cross section BIM model;
and 7: according to the characteristic water level, establishing a channel maintenance grade longitudinal section BIM model;
and step 8: combining BIM models of the channel maintenance grade cross sections and the longitudinal sections to form a channel model under a characteristic water level and generate a curved surface S3 of the navigation channel;
and step 9: building a BIM volume curved surface model V2 by using the BIM curved surface model S2 of the underwater terrain after the flood and the curved surface S3 of the navigation channel;
step 10: and analyzing the current scale and maintenance measures of the navigation channel according to the V2 characteristic of the BIM volume curved surface model.
Determining the flood season of the channel according to the current year hydrological data sequence of the channel control water level station, and determining the river bed observation dates before and after the flood; the water level in the non-flood season is reduced to cause the navigation obstruction of the shoals, and the change range and the characteristic water level in the medium-dry season need to be determined according to the hydrological sequence.
The further technology of the invention is as follows:
preferably, in the step 2, the underwater topography internal work result is 1.
Preferably, in the step 3, the underwater terrain BIM curved surface model before the flood is a triangular mesh curved surface model or a grid curved surface model.
Preferably, in the step 4, the reference curved surface of the BIM volume curved surface model V1 is the underwater terrain BIM curved surface model S1 before the flood.
Preferably, in the step 5, the erosion and deposition calculation is obtained by an envelope volume of the volume curved surface V1, or is obtained by the curved surface models S1 and S2 by setting a sampling interval and a sampling line; riverbed evolution is calculated by slope and slope analysis of S1 and S2.
Preferably, in step 6, the BIM cross-section model is a parameterized assembly and includes a parameter control component and a physical component.
Preferably, in step 7, the channel maintenance level profile is obtained from the characteristic water level and the channel design water depth.
Preferably, in the step 10, the current state scale of the channel is obtained by making a zero isopachous line on the volume curved surface model V2; whether the channel scale meets the maintenance scale or not can be evaluated by the following method:
1) Restricting the silt depth; the water depth of the maintenance can not be met within the range of the bottom width of the channel, and the average silt height is lower than a critical value h c ；
2) Bottom width constraint; the bottom width meeting the maintenance water depth in the range of the bottom width of the channel is less than the critical value
And->
The following requirements are satisfied:
in the formula:
x-channel rating;
B (x+1) -a minor level channel minimum base width of an x level channel;
the minimum bottom width difference value of the delta B-x level channel and the secondary level channel;
controlling the ratio of the bottom width between the lambda-grade channels;
in addition, a channel length constraint l may be added c Or channel proportional constraint p c When the length of the flight section which does not meet the water depth constraint or the bottom width constraint does not exceed the channel length constraint l c Or the range mileage proportion does not exceed the channel proportion constraint p c And judging that the navigation section meets the requirement of the maintenance level of the navigation channel.
The invention has the following technical effects:
aiming at the defects of the current artificial CAD drawing method in analyzing the channel maintenance measures, the invention overcomes the defect of low efficiency in the artificial CAD drawing analysis by researching the relevant standard specifications of channel design and the requirements of channel management and maintenance, modeling and analyzing the current conditions of channel riverbeds by combining hydrologic annual characteristic water levels and considering the influence factors of whether the channel dimensions meet the maintenance conditions under the actual channel maintenance level, eliminates the interference of human factors on the calculation results and solves the problems of quantitative calculation of the current conditions of the channel and the analysis of maintenance measure schemes in the engineering management and maintenance stage.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts;
FIG. 1 is a schematic flow chart of the main implementation of the present invention;
FIG. 2 is a graph of measured recent hydrological statistics in an embodiment of the present invention;
FIG. 3 is a cross-sectional model diagram of a waterway in an exemplary embodiment of the present invention;
FIG. 4 is a plan view of a curved surface of a channel in an exemplary embodiment of the invention;
FIG. 5 is a graphical illustration of a slot scale analysis in an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
The invention provides a figure 1 which is an execution flow of a BIM-based channel maintenance measure provided by the invention, and the execution flow comprises a whole set of processes of channel erosion and deposition calculation, channel evolution, channel scale analysis, maintenance measure analysis and the like. The method of the embodiment mainly comprises the following steps:
step 1: the recent hydrological statistical data in the research channel area are shown in a figure 2, and the hydrological statistics data are calculated to obtain the flood season months (6-9 months) and the dry season months (10 months-5 months of the next year) in the hydrological year, wherein the annual water level change range except the flood year is small and generally changes in the range of 6.5-8.5 m, and the characteristic water level is 6.5m;
step 2: according to the relevant regulation requirements of channel maintenance. Carrying out underwater topography measurement operation after flood in front of flood on a channel research segment, generally using a single-beam depth measuring instrument to carry out water depth measurement, forming an underwater topography internal work result, and finally converting the result into CAD mapping data to reflect the change of riverbed topography elevation;
and step 3: establishing a BIM triangulation network curved surface model S1 of the underwater terrain before a flood and a BIM triangulation network curved surface model S2 of the underwater terrain after the flood according to the underwater terrain interior achievement; and filtering the measurement points with abnormal elevation through the definition function of the curved surface, and defining the boundary of the triangular net curved surface.
And 4, step 4: establishing a BIM triangulation network volume curved surface model V1 by taking the S1 as a reference curved surface and the S2 as a target curved surface;
and 5: in order to analyze the back-silting intensity and the distribution rule of the channels at the entrance of the flood season, sampling lines are arranged along the trend of the channels for analyzing the cross section of the channels, erosion-silting calculation is carried out according to the characteristics of the curved surface models S1, S2 and V1, and the comparison of the results is shown in a table 1; the slope and slope analysis is carried out on the S1 and the S2, the swing of the deep-field line in the flood season is very small, and the trend is not changed obviously;
TABLE 1 comparison of erosion and deposition calculations
Step 6: according to the channel design data, a channel maintenance level cross section model is established, the model is a BIM assembly and consists of a river channel part, a side slope part and a control part, and the figure is 3;
and 7: establishing a channel maintenance grade longitudinal section, namely a straight line section with the distance elevation of 2.5m according to the characteristic water level of 6.5m determined in the step 1 and the channel maintenance water depth of 4 m;
and step 8: combining the BIM models of the cross sections and the longitudinal sections of the channel maintenance grades to form a channel model under the characteristic water level and generate a curved surface S3 of the navigation channel, wherein an irregular sideline of the curved surface is an intersection line of the navigation channel and an original terrain curved surface as shown in figure 4;
and step 9: establishing a BIM triangulation network volume curved surface model V2 by taking the S2 as a reference curved surface and the navigation channel curved surface S3 as a target curved surface;
step 10: according to the characteristics of the BIM volume curved surface model V2, a 0-equal-thickness line is drawn, as shown in figure 5, the equal-thickness line penetrates through the navigation section and approaches to the central line of the navigation channel, and the navigation section does not meet the requirement of the maintenance level of the navigation channel under the characteristic water level. And calculating the maintenance dredging amount by using the V2, wherein the maintenance dredging amount is about 20 ten thousand square, and in view of large engineering quantity, an annual maintenance plan of the section is made according to actual maintenance capacity and expenditure guarantee, and the channel maintenance dredging work is carried out so as to ensure the safety and smoothness of the channel.
The method has the advantages that the quantitative calculation of the erosion and deposition change of the riverbed after the flood in front of the flood is carried out through the volume curved surface technology, the method can be compared with a standard average end area method, the calculation efficiency is high, and the method is not influenced by the sampling interval;
the slope gradient analysis technology of the volume curved surface can intuitively and efficiently reflect the trend of the deep body line and eliminate the artificial interference of manually connecting the deep body line;
the BIM model of the navigation channel can directly adopt the BIM model achievement of the navigation channel in the design and construction stages, so that the extended application of the BIM model in the maintenance stage in the whole life cycle of the navigation channel is realized, and the information island effect among organizations is broken;
the BIM parameterized component model can adapt to the on-the-way change of channel design parameters, and can efficiently analyze different maintenance scale schemes of a channel;
the BIM parameterization characteristic efficiently realizes the multi-scale judgment of the channel scale and the maintenance standard, and provides a sufficient reference basis for channel maintenance measures.
In the present invention, features are not necessarily present in isolation, but are interleaved with each other unless explicitly stated or limited. The foregoing shows and describes the general principles, broad features, and advantages of the invention. Those skilled in the art should appreciate that the present invention is not limited to the above-described embodiments, and the above-described embodiments and descriptions are only preferred examples of the present invention, and are not intended to limit the present invention to the only choice. The invention may be further modified and optimized while remaining within the spirit and scope of the claimed invention, as defined by the appended claims and their equivalents.
Claims (1)
1. BIM-based channel maintenance measure analysis method is characterized by comprising the following steps: the method comprises the following steps:
step 1: calculating flood, month of dry season and characteristic water level in hydrological years according to hydrological statistical data in a channel area to be researched;
step 2: according to relevant requirements of channel maintenance, carrying out underwater terrain measurement operation after flood and flood in a channel research segment, and forming an underwater terrain internal work result;
and 3, step 3: establishing a BIM curved surface model S1 of the underwater terrain before a flood and a BIM curved surface model S2 of the underwater terrain after the flood according to the underwater terrain interior achievement;
and 4, step 4: building a BIM volume curved surface model V1 by using the BIM curved surface models S1 and S2 of the underwater topography after flood and flood ahead;
and 5: carrying out erosion and deposition calculation and river bed evolution analysis according to the characteristics of the curved surface models S1, S2 and V1;
step 6: establishing a BIM (building information modeling) model of a cross section of a channel maintenance level according to channel design data;
and 7: according to the characteristic water level, establishing a channel maintenance grade longitudinal section BIM model;
and 8: combining BIM models of the channel maintenance grade cross sections and the longitudinal sections to form a channel model under a characteristic water level and generate a curved surface S3 of the navigation channel;
and step 9: building a BIM volume curved surface model V2 by using the BIM curved surface model S2 of the underwater terrain after the flood and the curved surface S3 of the navigation channel;
step 10: according to the characteristics of the BIM volume curved surface model V2, analyzing the current state scale of the navigation channel and maintenance measures;
in the step 2, the underwater topography internal work result is 1;
in the step 3, the BIM curved surface model of the underwater terrain before the flood is a triangular mesh curved surface model or a grid curved surface model;
in the step 4, the BIM curved surface model S1 of the underwater terrain before flood is taken from the reference curved surface of the BIM volumetric curved surface model V1;
in the step 5, the erosion and deposition calculation is obtained by the envelope volume of the volume curved surface V1, or is obtained by curved surface models S1 and S2 in a mode of setting a sampling interval and a sampling line; the river bed evolution is calculated through slope and surface analysis of S1 and S2;
in the step 6, the BIM cross section model is parameterized and assembled and comprises a parameter control part and an entity part;
in the step 7, the channel maintenance level longitudinal section is obtained by the characteristic water level and the channel design water depth;
in the step 10, the current state scale of the channel is obtained by making a zero-thickness-equality line through the volume curved surface model V2; whether the channel scale meets the maintenance scale or not can be evaluated by the following method:
1) Restricting the silt depth; the water depth of the maintenance can not be met within the range of the bottom width of the channel, and the average silt height is lower than a critical value h c ；
2) Bottom width constraint; the bottom width meeting the maintenance water depth in the range of the bottom width of the channel is less than the critical value
And->
The following requirements are satisfied:
in the formula:
x is the channel grade;
B (x+1) the minimum bottom width of a secondary level channel of an x level channel;
delta B is the minimum bottom width difference value of the x-grade channel and the secondary-grade channel;
and lambda is the bottom width scale control proportion between the level channels.
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