CN-121525532-B - Fire-fighting channel and fire hydrant layout method and system for traditional neighborhood

CN121525532BCN 121525532 BCN121525532 BCN 121525532BCN-121525532-B

Abstract

The invention discloses a fire fighting channel and fire hydrant layout method and system for a traditional block, which are used for importing traditional block information, including title cell boundaries, building outlines, layer number information and building protection level information in the block, carding the traditional block information to obtain an actual road center line, generating a fire fighting channel based on the existing passable fire fighting channel condition until all areas in the block are covered, ensuring that all title cells are covered by at least two fire hydrant service radiuses, carrying out fire hydrant layout, and carrying out specific verification and analysis of fire fighting paths aiming at each title cell, so as to ensure that the building can obtain timely fire fighting under the condition of fire. The invention can not only remarkably improve the design efficiency and the coverage comprehensiveness, but also ensure the rationality and the operability of the result by combining the multi-scheme generation with the manual screening.

Inventors

HAN DONGQING
WANG JIACHENG
DONG YINAN
Tang Pi
SONG YACHENG
GE XIN
HU ZHENYU

Assignees

东南大学

Dates

Publication Date: 20260512
Application Date: 20260115

Claims (8)

1. A fire control channel and fire hydrant layout method facing to traditional blocks is characterized by comprising the following steps: Importing traditional block information, including title cell boundaries in blocks, building outlines, layer number information and building protection level information; carding the traditional neighborhood information to obtain an actual road center line; generating a fire-fighting channel based on the existing passable fire-fighting channel conditions until all areas in the neighborhood are covered, generating the fire-fighting channel, identifying the areas which are not covered in the neighborhood based on the existing passable fire-fighting channel conditions, traversing all candidate channels, comprehensively evaluating the covering contribution and the required disassembly and modification cost of the areas to be reinforced, sorting according to the size of the benefits, generating a plurality of preferred paths, further considering the setting of a return yard for the dead-end channel to ensure the fire-fighting passing rationality, repeating the operation until all the areas in the neighborhood are covered, further considering the setting of the return yard for the dead-end channel to ensure the fire-fighting passing rationality, and repeating the operation until all the areas in the neighborhood are covered specifically: The road section is extracted from the dead-end path, the length of the road section is controlled by a parameter tail_length, and the road section is set according to different path characteristics and is used for subsequent carriage return field arrangement and channel optimization reference; Parallel offset is carried out for many times along two sides of the extracted road section by using sampling step length sampling_interval to form a series of parallel offset lines, each offset line is split by using sampling_interval as step length to obtain candidate center points, a punctiform plane is formed on two sides of the road by using the uniform distribution mode, and each point can be used as a potential return yard arrangement position to provide alternatives for subsequent optimization selection; Generating a square return yard by taking the candidate center point as a reference, determining the side length by the corresponding fire-fighting channel grade, keeping the direction of the return yard consistent with the direction of the road, analyzing the space occupation of each return yard position, superposing the return yard positions with peripheral property units, and counting possible conflict and dismantling areas; Intercepting an actual channel road section, namely finding the nearest point of each candidate center point on the road section, and intercepting the road from the nearest point to an outlet end, wherein the road section is the actual fire fighting channel; the method comprises the steps of collecting a road section of a road, collecting the collected road section of the road section, and collecting the collected road section of the road section; Calculating the total cost of the path by taking the cost required to be removed in the carriage return place, performing trial calculation on the carriage return place position generated by each candidate center point, selecting a scheme with the maximum widening value V as the final carriage return place position, and taking an actual channel section corresponding to the carriage return place position as the selected fire fighting channel; Ensuring that all property units are covered by at least two fire hydrant service radiuses, and performing fire hydrant layout; specific verification and analysis of fire paths are performed for each title unit, so that timely suppression of the building under the condition of fire is ensured.
2. The method for arranging fire fighting channels and fire hydrants facing traditional blocks according to claim 1, wherein traditional block information is combed, constraint boundaries are constructed, a Delaunay triangle network with constraint is established by taking the boundary lines as constraint conditions, triangle classification and road center line extraction are carried out on the triangle network, a graph structure is established based on the road center line, iterative simplification is carried out, a road center line which tends to be concise is obtained after 2-3 rounds of simplification, and finally an actual road center line is obtained after finishing according to actual surrounding environment conditions of the blocks.
3. The method for arranging fire fighting channels and fire hydrants facing traditional blocks according to claim 1 is characterized in that based on the existing passable fire fighting channel conditions, the area which is not covered in the blocks is identified, specifically, an existing passable road or channel is regarded as an initial fire fighting channel, a covering buffer radius R is set for the initial fire fighting channel, a covering area Region of the fire fighting channel is obtained, difference set operation is carried out on the covering area region_origin with the integral area Region of the blocks, an uncovered area is obtained and is recorded as a Region region_rest to be reinforced, and therefore a target covering area requiring a new fire fighting channel is determined.
4. The traditional neighborhood oriented fire fighting access and hydrant layout method according to claim 1, wherein all candidate channels are traversed, the coverage contribution of the areas to be reinforced and the required dismantling cost are comprehensively evaluated, and the plurality of preferred paths are generated by sorting according to the profit size, wherein the steps are as follows: Establishing buffer areas at two sides of a road according to a set fire-fighting road grade, identifying property units intersected with the buffer areas, dividing the property units into two sides of the road according to the positions of the property units relative to the road, and then calculating the minimum distance between the property units at two sides; Based on the road sections, building a corresponding graph structure, and searching all paths which can return to the fire-fighting channel or reach the end from the existing fire-fighting channel through the channel to be selected by depth-first searching; counting the property units related to two sides of each path according to the road sections contained in each path, judging the property units to be in conflict if the distance between two buildings is smaller than the set width, collecting all conflict pairs and establishing a conflict adjacency list, and calculating a demolition score = property unit value/(adjacent conflict unit quantity; obtaining dismantling cost required to be paid by each path under the condition that the width requirement is met, establishing a buffer zone for the paths by the radius R, solving intersection with a region to be reinforced to obtain a reinforced coverage area, sequencing all candidate paths according to the widening value from high to low, and outputting a plurality of schemes with highest comprehensive scores for manual decision and scheme comparison selection.
5. The method for arranging fire-fighting channels and fire hydrants facing traditional blocks according to claim 1, wherein after determining newly added fire-fighting channels, the set of fire-fighting channels and channels to be widened needs to be updated synchronously, property units in the blocks are corrected, a plurality of groups of schemes are continuously generated in each iteration, and the remaining areas to be reinforced are gradually covered until main areas in the blocks meet the service requirement of the fire-fighting channels through comprehensive value sequencing and manual screening, so that complete coverage of the whole domain is realized.
6. The method for arranging fire fighting channels and fire hydrants facing traditional blocks according to claim 1, wherein fire hydrants are generated, property units are used as basic coverage objects, discrete processing is carried out by adopting a lattice point method, greedy algorithm is adopted to gradually select candidate points which can maximally cover point sets which do not meet requirements until all property units are covered by at least two fire hydrants service radiuses, global optimization is carried out by utilizing a genetic algorithm on the basis of obtaining feasible solutions, redundant fire hydrants are tried to be deleted, and a better final layout scheme is obtained on the premise of guaranteeing coverage requirements.
7. The method for arranging fire tunnels and fire hydrants facing the traditional neighborhood according to claim 1, wherein a buffer area is built at a fixed interval d_buf for each title unit polygon, a road section intersecting a road is found in the buffer area, n_hyd fire hydrants closest to each title unit are found, dijkstra algorithm is respectively adopted on a road network, shortest paths from title unit access points to the selected fire hydrants are calculated, shortest paths from the fire hydrants to external roads are calculated at the same time, so as to simulate fire vehicle access tunnels, actual time required for putting out fire vehicles and personnel is estimated through combination of path lengths, the above procedures are implemented one by one for each title unit, full-field household-by-household verification results are generated, and the positions of the fire hydrants or the road access connection are adjusted according to the verification results, so that a final optimization scheme is formed.
8. A system for implementing the traditional neighborhood oriented fire fighting access and fire hydrant layout method as claimed in claim 1, comprising an information importing module, an information carding module, a fire fighting access generating module, a fire hydrant generating module and a accessibility verifying module, wherein the information importing module imports traditional neighborhood information, the information carding module cards the traditional neighborhood information to obtain an actual road center line, the fire fighting access generating module is based on the existing passable fire fighting access conditions until all areas in the neighborhood are covered, the fire hydrant generating module guarantees that all property units are covered by at least two fire hydrant service radiuses, fire hydrant layout is carried out, and the accessibility verifying module carries out specific verification and analysis of fire fighting paths for each property unit, so that timely rescue of a building under a fire condition is guaranteed.

Description

Fire-fighting channel and fire hydrant layout method and system for traditional neighborhood Technical Field The invention relates to the technical field of fire protection system planning, in particular to a traditional neighborhood-oriented fire fighting channel and fire hydrant layout method and system. Background The characteristics of high building density, narrow roads, irregular street textures and the like commonly exist in the traditional neighborhood, so that the traditional neighborhood has great challenges in the planning and design of a fire-fighting system. On the one hand, the road shape of the neighborhood is irregular, the branches are numerous, the scale is limited, the building space is compact, and the space relationship is complex. Designers often need to gradually judge road connectivity and fire truck accessibility, and are difficult to simultaneously consider fire safety, neighborhood protection, scheme economy and practicality in a global scope. On the other hand, the existing design method mainly depends on manual drawing and experience judgment, has low efficiency when facing the complex conditions, and is easy to leak. The traditional method lacks systematic and digital support, so that the scheme is slow to iterate, the adjustment of the block condition is difficult to quickly respond, and meanwhile, the problems of coverage blind areas, arrangement redundancy and the like can occur. In this context, the introduction of digitization technology is an important way to enhance the design capabilities of fire protection systems. By establishing a spatial data model and utilizing an algorithm to automatically generate a fire-fighting channel and fire hydrant layout scheme, the scheme can be rapidly generated and compared with multiple schemes on the whole scale, and the efficiency and coverage comprehensiveness are remarkably improved. Meanwhile, the digitizing method provides systematic analysis support for design, so that designers can make more reasonable and quantifiable decisions under complex conditions. Disclosure of Invention The invention aims to provide a traditional neighborhood-oriented fire-fighting channel and fire hydrant layout method and system, which not only can remarkably improve design efficiency and coverage comprehensiveness, but also can ensure rationality and operability of results by combining multi-scheme generation with manual screening. The invention discloses a traditional neighborhood-oriented fire fighting access and fire hydrant layout method, which comprises the following steps: Importing traditional block information, including title cell boundaries in blocks, building outlines, layer number information and building protection level information; carding the traditional neighborhood information to obtain an actual road center line; generating a fire-fighting channel based on the existing passable fire-fighting channel conditions until all areas in the neighborhood are covered; Ensuring that all property units are covered by at least two fire hydrant service radiuses, and performing fire hydrant layout; specific verification and analysis of fire paths are performed for each title unit, so that timely suppression of the building under the condition of fire is ensured. Further, the traditional neighborhood information is combed, constraint boundaries are constructed, the boundary lines are used as constraint conditions, a Delaunay triangle network with constraint is established, triangle classification and road center line extraction are carried out on the triangle network, a graph structure is established based on the road center line, iterative simplification is carried out, after 2-3 rounds of simplification, a road center line which tends to be concise is obtained, and finally, according to the actual surrounding environment conditions of the neighborhood, the actual road center line is obtained after finishing. Further, generating a fire-fighting channel, identifying an area which is not covered in a neighborhood based on the existing passable fire-fighting channel conditions, traversing all candidate channels, comprehensively evaluating the covering contribution and the required dismantling and changing cost of the area to be reinforced, sorting according to the size of benefits, generating a plurality of better paths, regarding the end channel, further considering the setting of a truck yard to ensure the fire-fighting passing rationality, and repeating the operation until all the areas in the neighborhood are covered. Further, based on the existing passable fire-fighting channel conditions, the method comprises the steps of identifying the area which is not covered in the neighborhood, specifically, regarding the existing passable road or channel as an initial fire-fighting channel, setting a covering buffer radius R for the initial fire-fighting channel to obtain a covering area Region of the fire-fighting channel, performing difference operati