Subway station air duct scale optimization design method

Abstract

The invention relates to the technical field of subway station air duct plane design, and discloses a subway station air duct scale optimization design method. The method comprises the following steps: firstly, determining a subway station air duct ground building design initial point according to an inclination angle between a subway station air duct ground building and a station line, and then determining each endpoint coordinate of the subway station air duct ground building according to a quadrant where the subway station air duct ground building is located and outer contour information of the subway station air duct ground building; then, according to the quadrant where the subway station air duct ground building is located and the relation information between the station line and the subway station, the initial design point of the subway station air duct underground building is determined, and according to the closest distance between a piston air shaft in the subway station air duct ground building and the outer contour of a station body, the width and the inclination angle of the air duct ground building; coordinates of all end points of the subway station air duct underground building are determined; therefore, the subway station air duct is designed. The basic functions of the air duct are met, the air duct scale is reduced as much as possible, and the engineering cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of plane design of subway station air ducts, and in particular to a method for optimizing the scale design of subway station air ducts. Background Art

[0002] As an efficient and high-capacity urban rail transit tool, the subway is crucial to the sustainable development of the city. It effectively relieves the pressure of ground traffic, reduces road congestion and air pollution, and is an indispensable part of the modern urban transportation system. The design and layout of subway air ducts are crucial to ensure the safe, comfortable and efficient operation of the subway system. The air duct plays a role in ventilation in the subway system, ensuring air quality and removing heat, exhaust gas and possible fire smoke generated by trains.

[0003] As mentioned above. In the design process of subway station air ducts, the main purpose is to achieve its functionality, while also considering controlling its size. An oversized air duct will increase the initial construction cost, including material costs, construction difficulty, and occupy more underground space. An appropriately sized air duct can reduce engineering construction costs and energy consumption of equipment such as fans while ensuring ventilation effects, thereby reducing long-term operating costs.

[0004] In existing design methods, usually only the function is considered. In order to meet the functional requirements, redundant design is usually done, which leads to the expansion of scale and increased construction costs.

[0005] Therefore, there is an urgent need for an optimization design method for the scale of subway station air ducts, which can meet the functions of subway station air ducts while reasonably controlling their scale and controlling construction costs to meet the goal of high-quality development of subway construction. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a method for optimizing the scale of subway station air ducts, comprising the following steps: S1: Determine the initial design point of the subway station air duct ground building according to the inclination angle between the subway station air duct ground building and the station line; S2: Based on the initial design point of the subway station air duct ground building, according to the quadrant where the subway station air duct ground building is located and the outer contour information of the subway station air duct ground building, determine the coordinates of each end point of the subway station air duct ground building; S3: Determine the initial design point of the underground building of the subway station air duct according to the quadrant where the ground building of the subway station air duct is located and the relationship between the station line and the subway station; S4: Based on the design initial point of the underground building of the subway station duct, according to the shortest distance between the piston air shaft in the ground building of the subway station duct and the outer contour of the station body, the width of the ground building of the duct and the inclination angle, determine the coordinates of each end point of the underground building of the subway station duct; S5: Designing the subway station air duct based on the coordinates of each end point of the ground building of the subway station air duct and the coordinates of each end point of the underground building of the subway station air duct.

[0007] Furthermore, in S1, determining the design initial point of the subway station air duct ground building according to the inclination angle between the subway station air duct ground building and the station line includes the following steps: S11: Determine the positive and negative relationship between the inclination angles of the ground building of the subway station air duct and the station line; S12: According to the positive and negative relationship, a calculation method for the initial point of the ground building design of the subway station air duct is selected; S13: Determine the initial point of the ground building design of the subway station air duct according to the calculation method of the selected initial point of the ground building design of the subway station air duct.

[0008] Furthermore, in S12, according to the positive and negative relationship, a calculation method for selecting the initial point of the ground building design of the subway station air duct specifically includes: If α≥0, the calculation formula for the initial point of the subway station air duct ground building design is: X 上 =L 1 -δ+β-L u ; Y 上 =2D 1 +W+D 2 +δ+D; If α<0, the calculation formula for the initial point of the ground building design of the subway station air duct is: X 上 =L 1 -δ+β; Y 上 =2D 1 +W+D 2 +δ+D; Where α is the inclination angle between the ground building of the subway station wind tunnel and the station line, X 上 It represents the absolute value of the horizontal coordinate of the initial point of the ground building design of the subway station air duct, Y 上 It represents the absolute value of the vertical coordinate of the initial point of the ground building design of the subway station air duct, D 1 Indicates the distance between the station line and the edge of the platform, D 2 It indicates the distance between the station line and the inner side of the main outer wall of the subway station. W indicates the platform width. L lrepresents the vertical distance between the terminal mileage line of the subway station and the center mileage line of the platform, δ represents the thickness of the main exterior wall of the subway station, β represents the thickness of the ground building wall of the wind duct, and L u It represents the length of the ground building of the subway station air duct, and D represents the shortest distance between the ground building of the air duct and the outer edge of the main body of the subway station.

[0009] Furthermore, the outer contour information of the ground building of the subway station air duct is determined by the relationship information between the station line and the subway station, the area of ​​each ground building of the subway station air duct and the distance between the buildings, and specifically includes the following steps: S21: Obtain the relationship information between the station line and the subway station, including the distance D between the station line and the edge of the platform 1 , the distance D between the station line and the inner side of the main outer wall of the subway station 2 , Platform width , the vertical distance L between the starting mileage line of the subway station and the mileage line of the center of the platform r , the vertical distance L between the terminal mileage line of the subway station and the center mileage line of the platform l , the thickness of the main exterior wall of the subway station δ; S22: Obtain the area and building spacing of each ground building in the subway station wind tunnel; S23: Determine the outer contour information of the ground building of the subway station air duct according to the relationship information between the station line and the subway station, the area of ​​each ground building of the subway station air duct and the distance between the buildings; the outer contour information of the ground building of the subway station air duct includes the length L of the ground building of the subway station air duct u and width W u .

[0010] Furthermore, in S3, according to the quadrant where the subway station air duct ground building is located and the relationship information between the station line and the subway station, the initial point of the subway station air duct underground building design is determined, which specifically includes: S31: According to the relationship information between the station line and the subway station, determine the absolute value of the horizontal coordinate and the absolute value of the vertical coordinate of the initial point of the underground building design of the subway station wind tunnel, and the calculation formula is: X 下 =L r -δ; Y 下 =2D 1 +W+D 2 +δ+W 1 ; In the formula, X 下 represents the absolute value of the horizontal coordinate of the initial point of the underground building design of the subway station air duct, Y 下 It represents the absolute value of the ordinate of the initial point of the underground building design of the subway station air duct, W 1 Indicates the outer expansion width of the shield section; S32: Based on the quadrant where the ground building of the subway station air duct is located, assign corresponding positive and negative values to the absolute value of the abscissa and the absolute value of the ordinate of the initial design point of the underground building of the subway station air duct respectively, so as to obtain the initial design point of the underground building of the subway station air duct.

[0011] Further, in the above S4, based on the initial design point of the underground building of the subway station air duct, according to the shortest distance between the piston air shaft and the outer contour of the station main body in the ground building of the subway station air duct, the width of the ground building of the air duct, and the inclination angle, determine the coordinates of each end point of the underground building of the subway station air duct. Specifically, it includes: S41: Obtain the shortest distance between the piston air shaft and the outer contour of the station main body in the ground building of the subway station air duct, compare the shortest distance with the piston air duct length threshold, and determine the inner net length of the interface between the underground building of the air duct and the station main body according to the comparison result; S42: Based on the width of the ground building of the subway station air duct, determine the width of the outer expansion section at the end of the air duct; S43: Based on the initial design point of the underground building of the subway station air duct, according to the shortest distance, the width of the outer expansion section at the end of the air duct, the inclination angle, and the inner net length of the interface between the underground building of the air duct and the station main body, determine the coordinates of each end point of the underground building of the subway station air duct.

[0012] Further, in the above S41, obtain the shortest distance between the piston air shaft and the outer contour of the station main body in the ground building of the subway station air duct, compare the shortest distance with the piston air duct length threshold, and determine the inner net length of the interface between the underground building of the air duct and the station main body. Specifically, it is: S411: Based on the inclination angle, obtain the shortest distance between the piston air shaft and the outer contour of the station main body in the ground building of the subway station air duct: If α≥0°, then D min =D+(L u -M)×sinα; If α<0°, then D min =D; Wherein, D min is the shortest distance between the piston air shaft and the outer contour of the station main body in the ground building of the subway station air duct, D is the shortest distance between the ground building of the air duct and the outer edge of the subway station main body, M is the total length of the two piston air shafts and their spacing in the ground building of the air duct, α is the inclination angle between the ground building of the subway station air duct and the station line, and L u is the length of the ground building of the subway station air duct; S412: Compare the shortest distance with the piston air duct length threshold, and determine the inner net length of the interface between the underground building of the air duct and the station main body according to the comparison result: If D min <A, then L d=L u -2β; If A ≤ D min B, then L d =P; If D min ≥ B, then L d =Q; Wherein, L d represents the inner net length of the interface between the underground building of the air duct and the main body of the station, β represents the thickness of the wall of the ground building of the air duct, A represents the threshold value of the length of the piston air duct when the accident fan and muffler in the piston air duct are both inside the main body of the station, B represents the threshold value of the length of the piston air duct when the accident fan and muffler in the piston air duct are both inside the air duct of the station, P represents the inner net length of the interface between the air duct of the station and the main body of the station when there is only one set of accident fans and mufflers in the piston air duct inside the main body of the station, Q represents the inner net length of the interface between the air duct of the station and the main body of the station when both sets of accident fans and mufflers in the piston air duct are inside the main body of the station, and A < B, L u -2β > P > Q.

[0013] Furthermore, in the S42, based on the width of the ground building of the subway station air duct, determine the width of the outer expansion section at the end of the air duct, specifically including: If α ≥ 0°, and D min < A, then there is no need to set the outer expansion section at the end of the air duct; If α ≥ 0°, and D min ≥ A, then it is necessary to set the outer expansion section at the end of the air duct; determine the width D 外扩 of the outer expansion section at the end of the air duct according to the evacuation net width and the air passing area of the fresh air shaft; When α < 0°, as Figure 7 shown, If α < 0°, and D min < A, then there is no need to set the outer expansion section at the end of the air duct; If α < 0°, and D min ≥ A, and (L u - β) × cosα ≤ L d + β, then there is no need to set the outer expansion section at the end of the air duct; If α < 0°, and D min ≥ A, and (L u - β) × cosα > L d + β, then it is necessary to set the outer expansion section at the end of the air duct; determine the width D 外扩 of the outer expansion section at the end of the air duct according to the evacuation net width and the air passing area of the fresh air shaft.

[0014] Wherein, W u represents the width of the ground building of the subway station air duct, D 外扩Indicates the external expansion width of the air duct end.

[0015] Furthermore, after S5, the step further includes determining the location of the subway station evacuation exit according to the subway station air duct, specifically: According to the coordinates of each end point of the underground building of the subway station air duct, the underground building areas of the subway station air duct on the left and right sides are obtained respectively; Get the main area on the left side and the main area on the right side of the subway station respectively; According to the underground building area of ​​the subway station air duct on the left and right sides, the main body area of ​​the subway station on the left and right sides, determine the sum of the area of ​​the underground building of the subway station air duct on the left and right sides and the main body of the subway station on their sides; An evacuation exit of the subway station is arranged on the side where the sum of the areas is larger, thereby completing the determination of the location of the evacuation exit of the subway station.

[0016] Furthermore, after determining the location of the subway station evacuation exit, it also includes: Optimize the scale design of the subway station air duct on the side corresponding to the subway station evacuation exit. The initial point of the subway station air duct ground building design is determined according to the inclination angle between the subway station air duct ground building and the station line, as well as the width of the evacuation exit.

[0017] The embodiments of the present invention have the following technical effects: The method for optimizing the design of the scale of the subway station air duct provided by the present application is as follows: first, according to the inclination angle between the subway station air duct ground building and the station line, the initial design point of the subway station air duct ground building is determined, and then according to the quadrant where the subway station air duct ground building is located and the outer contour information of the subway station air duct ground building, the coordinates of each end point of the subway station air duct ground building are determined; then, according to the quadrant where the subway station air duct ground building is located and the relationship information between the station line and the subway station, the initial design point of the subway station air duct underground building is determined, and then according to the closest distance between the piston air shaft in the subway station air duct ground building and the outer contour of the station body, the width of the air duct ground building and the inclination angle, the coordinates of each end point of the subway station air duct underground building are determined; finally, the subway station air duct is designed with the coordinates of each end point of the subway station air duct ground building and the coordinates of each end point of the subway station air duct underground building. The subway station air duct obtained in this way can reduce the scale of the air duct as much as possible and reduce the engineering cost while meeting the basic functions of the air duct. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a flow chart of a method for optimizing the scale of air ducts in a subway station provided by an embodiment of the present invention; Figure 2 is a schematic diagram of a scene when the tilt angle α is ≥ 0 provided by an embodiment of the present invention; Figure 3 is a schematic diagram of a scene when the tilt angle α is less than 0 provided by an embodiment of the present invention; Figure 4 It is a schematic diagram of the endpoints of the ground building of the subway station air duct when the inclination angle α≥0 provided by an embodiment of the present invention; Figure 5 It is a schematic diagram of the endpoints of the ground building of the subway station air duct when the inclination angle α is less than 0 provided by an embodiment of the present invention; Figure 6 It is a schematic diagram of the width of the outward expansion section at the end of the air duct when the inclination angle α is ≥ 0 provided in an embodiment of the present invention; Figure 7 It is a schematic diagram of the width of the outward expansion section at the end of the air duct when the inclination angle α is less than 0 provided in an embodiment of the present invention; Figure 8 It is a schematic diagram of the endpoints of the underground building of the subway station air duct when the inclination angle α≥0 provided by an embodiment of the present invention; Fig. 9 It is a schematic diagram of the outward expansion width of the shield section provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the present invention.

[0021] This application is based on the distance between the ground building of the duct and the main body of the station and the angle of the ground building of the duct. Through preset optimization rules, the two-dimensional dimension data of the duct is determined to achieve the refined design of the subway station duct plan and achieve the purpose of scale control. Figure 1 is a flow chart of the subway station air duct scale optimization design method provided by the embodiment of the present invention. Figure 1 , specifically comprising the following steps: The present invention provides a method for optimizing the scale of a subway station air duct, comprising the following steps: S1: Determine the initial design point of the subway station air duct ground building according to the inclination angle between the subway station air duct ground building and the station line; Exemplarily, a coordinate system can be established, that is, the intersection of the platform center mileage line and the right line of the line is taken as the coordinate origin, the forward direction of the vehicle on the right line of the line is selected as the positive direction of the X-axis, the coordinate system is established, and the coordinates of each point in the coordinate system are determined.

[0022] For example, in the design of the subway station master plan, the subway line map is usually used as the upper sequence data. The line center mileage line is usually used to determine the distance between the upper and lower stations in the subway line. The contour lines of the various components of the subway body are usually parallel or perpendicular to the right line of the line. Therefore, the intersection of the platform center mileage line and the right line of the line is specified as the coordinate origin, and the forward direction of the right line vehicle is specified as the positive direction of the X axis. Then determine the coordinates of each point in the coordinate system.

[0023] The inclination angle is the angle between the ground building of the subway station air duct and the station line, and the angle with the positive direction of the X-axis is positive.

[0024] The subway station air duct ground building is used to represent the station air duct part above the ground, including air shafts and wind pavilions; the station air duct underground building is used to represent the station air duct part below the ground.

[0025] In some embodiments, in S1, determining the design initial point of the subway station air duct ground building according to the inclination angle between the subway station air duct ground building and the station line includes the following steps: S11: Determine the positive and negative relationship between the inclination angles of the ground building of the subway station air duct and the station line; S12: According to the positive and negative relationship, a calculation method for the initial point of the ground building design of the subway station air duct is selected; In some embodiments, in S12, the calculation method for selecting the initial point of the ground building design of the subway station air duct according to the positive and negative relationship specifically includes: If α≥0, Figure 2 As shown in the figure, the calculation formula for the initial point of the ground building design of the subway station air duct is: X 上 =L 1 -δ+β-L u ; Y 上 =2D 1 +W+D 2 +δ+D; If α<0, such as Figure 3 As shown in the figure, the calculation formula for the initial point of the ground building design of the subway station air duct is: X 上 =L 1 -δ+β; Y 上 =2D 1 +W+D 2+δ+D; Where α is the inclination angle between the ground building of the subway station wind tunnel and the station line, X 上 It represents the absolute value of the horizontal coordinate of the initial point of the ground building design of the subway station air duct, Y 上 It represents the absolute value of the vertical coordinate of the initial point of the ground building design of the subway station air duct, D 1 Indicates the distance between the station line and the edge of the platform, D 2 It indicates the distance between the station line and the inner side of the main outer wall of the subway station. W indicates the platform width. L l represents the vertical distance between the terminal mileage line of the subway station and the center mileage line of the platform, δ represents the thickness of the main exterior wall of the subway station, β represents the thickness of the ground building wall of the wind duct, and L u It represents the length of the ground building of the subway station air duct, and D represents the shortest distance between the ground building of the air duct and the outer edge of the main body of the subway station.

[0026] In the above method, the initial point of the ground building design is different when α≥0 and when α<0 for the following reasons: For the convenience of calculation and drawing, after obtaining the inclination angle α between the duct ground building and the station line, the duct ground building should be rotated around the design initial point. When α≥0, it rotates counterclockwise, and when α<0, it rotates clockwise. At the same time, the design obtains the closest distance D between the duct ground building and the outer edge of the subway station body, and the rotation of the duct ground building around the design starting point should not change the closest distance, that is, the duct ground building always rotates to a position away from the outer edge of the body. To ensure this, the present invention selects a calculation method for the corresponding subway station duct ground building design initial point based on the positive and negative relationship between the inclination angle of the subway station duct ground building and the station line.

[0027] S13: Determine the initial point of the ground building design of the subway station air duct according to the calculation method of the selected initial point of the ground building design of the subway station air duct.

[0028] S2: Based on the initial design point of the subway station air duct ground building, according to the quadrant where the subway station air duct ground building is located and the outer contour information of the subway station air duct ground building, determine the coordinates of each end point of the subway station air duct ground building; Determine the quadrant where the ground building of the subway station wind tunnel is located based on the ground road or landscape of the subway line; For example, the ground building of the subway station air duct cannot be set up randomly. It must not affect the traffic on the ground road and must be kept at a certain distance from the ground road; it must not affect other structures on the ground to avoid affecting their land rights; and it must maintain the necessary fire protection distance and environmental impact assessment distance from the surrounding buildings on the ground. The area is the first quadrant, and the coordinate point The area is the second quadrant, and the coordinate point The area is the third quadrant, and the coordinate point The area is quadrant 4. To meet the above requirements, the minimum distance between the ground building of the air duct and the outer edge of the station body is set to 3m.

[0029] In some embodiments, the outer contour information of the ground building of the subway station air duct is determined by the relationship information between the station line and the subway station, the area of ​​each ground building of the subway station air duct and the distance between the buildings, and specifically includes the following steps: S21: Obtain the relationship information between the station line and the subway station, including the distance D between the station line and the edge of the platform 1 , the distance D between the station line and the inner side of the main outer wall of the subway station 2 , Platform width , the vertical distance L between the starting mileage line of the subway station and the mileage line of the center of the platform r , the vertical distance L between the terminal mileage line of the subway station and the center mileage line of the platform l , the thickness of the main exterior wall of the subway station δ; S22: Obtain the area and building spacing of each ground building in the subway station wind tunnel; S23: Determine the outer contour information of the ground building of the subway station air duct according to the relationship information between the station line and the subway station, the area of ​​each ground building of the subway station air duct and the distance between the buildings; the outer contour information of the ground building of the subway station air duct includes the length L of the ground building of the subway station air duct u and width W u .

[0030] For example, when the tilt angle α ≥ 0, Figure 4 As shown in the figure, point N1 and point N2 are the two end points of the ground building of the subway station wind duct. The coordinate calculation of point N1 can be done using the following method: X N1X =X 上 + L u × cosα; Y N1Y =Y 上 + L u × sinα; In the formula, X N1X is the X coordinate of point N1 when the tilt angle α≥0, and Y N1Y is the Y coordinate of point N1 when the tilt angle α≥0.

[0031] The coordinates of point N2 can be calculated using the following method: X N2X =X N1X + W u× cosα; Y N2Y =Y N1Y － W u × sinα; In the formula, X N2X is the X coordinate of point N2 when the tilt angle α≥0, and Y N2Y is the Y coordinate of point N2 when the tilt angle α≥0.

[0032] For example, when the tilt angle α is less than 0, Figure 5 As shown in the figure, point N1 and point N2 are the two end points of the ground building of the subway station wind duct. The coordinate calculation of point N1 can be done using the following method: X N1X =X 上 +W u × sinα; Y N1Y =Y 上 + W u × cosα; In the formula, X N1X is the X coordinate of point N1 when the tilt angle α is less than 0, and Y N1Y is the Y coordinate of point N1 when the tilt angle α is less than 0.

[0033] The coordinates of point N2 can be calculated using the following method: X N2X =X N1X － L u × cosα; Y N2Y =Y N1Y + L u × sinα; In the formula, X N2X is the X coordinate of point N2 when the tilt angle α≥0, and Y N2Y is the Y coordinate of point N2 when the tilt angle α≥0.

[0034] Based on this example, the method for calculating the coordinates of the other endpoints of the ground building of the subway station wind duct is the same as above.

[0035] S3: Determine the initial design point of the underground building of the subway station air duct according to the quadrant where the ground building of the subway station air duct is located and the relationship between the station line and the subway station; In some embodiments, in S3, determining the design initial point of the underground building of the subway station air duct according to the quadrant where the ground building of the subway station air duct is located and the relationship information between the station line and the subway station specifically includes: S31: According to the relationship information between the station line and the subway station, determine the absolute value of the horizontal coordinate and the absolute value of the vertical coordinate of the initial point of the underground building design of the subway station wind tunnel, and the calculation formula is: X 下 =L r -δ; Y 下 =2D 1 +W+D 2 +δ+W 1 ; In the formula, X 下 represents the absolute value of the horizontal coordinate of the initial point of the underground building design of the subway station air duct, Y 下 It represents the absolute value of the ordinate of the initial point of the underground building design of the subway station air duct, W 1 Indicates the outer expansion width of the shield section, such as Fig. 9 As shown in; S32: Based on the quadrant where the subway station air duct ground building is located, the absolute value of the horizontal coordinate and the absolute value of the vertical coordinate of the initial design point of the subway station air duct underground building are assigned corresponding positive and negative values ​​to obtain the initial design point of the subway station air duct underground building.

[0036] S4: Based on the design initial point of the underground building of the subway station duct, according to the shortest distance between the piston air shaft in the ground building of the subway station duct and the outer contour of the station body, the width of the ground building of the duct and the inclination angle, determine the coordinates of each end point of the underground building of the subway station duct; In some embodiments, in S4, based on the design initial point of the subway station air duct underground building, according to the closest distance between the piston air shaft in the subway station air duct ground building and the outer contour of the station body, the width of the air duct ground building and the inclination angle, the coordinates of each end point of the subway station air duct underground building are determined, specifically including: S41: Obtain the closest distance between the piston air shaft in the ground building of the subway station air duct and the outer contour of the station body, and compare the closest distance with the piston air duct length threshold, and determine the inner net length of the interface between the underground building of the air duct and the station body according to the comparison result; In the traditional subway station air duct design method, the inner net length L of the interface between the air duct underground building and the station main body is d Usually customized, that is, usually L d =L u , that is, the inner net length of the interface between the underground air duct building and the station body is consistent with the length of the ground air duct building of the railway station. However, the inventor of this application found that when the closest distance between the piston air shaft in the ground air duct building of the subway station and the outer contour of the station body is different, the inner net length L of the interface between the underground air duct building and the station body is d It is too arbitrary to uniformly set the length of the ground building of the subway station air duct, which will cause unnecessary waste of space and increase engineering costs. This application sets the closest distance D between the piston air shaft in the ground building of the subway station air duct and the outer contour of the station body minThe ground building outline of the subway station air duct is divided into multiple value intervals according to the inclination angle α, and different internal net lengths L of the interface between the underground building of the air duct and the station main body are set for different value intervals d , so as to reduce the scale of the subway station air duct.

[0037] The ground building of the air duct usually includes: fresh air shaft, exhaust air shaft, piston air shaft 1, piston air shaft 2 and safety evacuation opening (whether the safety evacuation opening is set has been described above). There are spacing requirements between each air shaft. The above L u The value is based on the total length of each air shaft and the safety evacuation opening, including the spacing between each air shaft. The underground part of the air duct is provided with air ducts connecting each air shaft and evacuation channels connecting the safety evacuation openings. Silencers, air defense doors and corresponding civil engineering structures are arranged in the air ducts and evacuation channels. Accident fans are arranged in the two piston air shafts for emergency ventilation. The internal net length L of the interface between the air duct and the station main body d , depends on the air passing area of the air duct, the evacuation width, and the space for placing the accident fan. When the length of the air duct is large enough, the internal spaces, equipment and facilities inside it can be arranged in a staggered manner, so as to achieve the purpose of reducing the internal net length of the interface between the air duct and the station main body, and thus control the overall plane scale of the air duct.

[0038] In some embodiments, in S41, the shortest distance between the piston air shaft in the ground building of the subway station air duct and the outer contour of the station main body is obtained, and the shortest distance is compared with the piston air duct length threshold, and the internal net length of the interface between the underground building of the air duct and the station main body is determined according to the comparison result. Specifically: S411: Based on the inclination angle, obtain the shortest distance between the piston air shaft in the ground building of the subway station air duct and the outer contour of the station main body: If α≥0°, then D min =D+(L u -M)×sinα; If α<0°, then D min =D; Among them, D min is the shortest distance between the piston air shaft in the ground building of the subway station air duct and the outer contour of the station main body, D is the shortest distance between the ground building of the air duct and the outer edge of the subway station main body, M is the total length of the two piston air shafts and their spacing in the ground building of the air duct, α is the inclination angle between the ground building of the subway station air duct and the station line, L u is the length of the ground building of the subway station air duct; S412: Compare the shortest distance with the piston air duct length threshold, and determine the internal net length of the interface between the underground building of the air duct and the station main body according to the comparison result: Case 1: If D min <A, then L d =L u -2β; Determined based on the length of the two piston air shafts and their spacing. A is determined based on the length occupied by the piston air duct, fan, and muffler. In this case, due to The emergency fans and silencers in the two piston air ducts are relatively small and are located inside the main body of the station. Their width cannot be reduced and is consistent with the ground building length of the air duct. The minimum distance between the ground building of the air duct and the edge of the main body of the station is stipulated. Therefore, if the ground building of the air duct has a certain angle, the length of the piston air duct will change accordingly. Correction can be made and the above judgment can be made with the corrected air duct length to increase the accuracy of the judgment. Figure 6 shown.

[0039] Case 2: If A≤D min B, then L d =P; As described in the first case, when When L d Length can be reduced to ,As mentioned above, this value is not unique and is determined comprehensively based on the wind flow area of ​​each air duct, the width of the emergency fan, the evacuation width, etc.

[0040] Case 3: If D min ≥B, then L d =Q; As described in the first case, when When L d The length can be reduced to Q. As mentioned above, the value Q is not unique and is determined comprehensively based on the wind flow area of ​​each air duct, the width of the emergency fan, the evacuation width, etc.

[0041] As mentioned above, since D specifies the minimum distance between the ground building of the duct and the main body of the station, when , the piston air well position controls the length of the piston air duct, and no trigonometric function correction is required. Figure 7 shown.

[0042] Among them, L dLet \(L\) represent the internal net length of the interface between the underground building of the air duct and the station main body, \(\beta\) represent the thickness of the wall of the ground building of the air duct, \(A\) represent the threshold value of the length of the piston air duct when the emergency fan and muffler in the piston air duct are both inside the station main body, \(B\) represent the threshold value of the length of the piston air duct when the emergency fan and muffler in the piston air duct are both inside the station air duct, \(P\) represent the internal net length of the interface between the station air duct and the station main body when there is exactly one set of emergency fan and muffler in the piston air duct inside the station main body, \(Q\) represent the internal net length of the interface between the station air duct and the station main body when both sets of emergency fan and muffler in the piston air duct are inside the station main body, and \(A < B\). u \(L - 2\beta> P> Q\).

[0043] By comparing the shortest distance between the piston air shaft in the ground building of the subway station air duct and the outer contour of the station main body with the threshold value of the piston air duct length, the internal net length of the interface between the underground building of the air duct and the station main body is determined. Considering different scenarios, the scale of the air duct is further reduced, thus reducing the project cost.

[0044] S42: Determine the width of the outer expansion section at the end of the air duct based on the width of the ground building of the subway station air duct; In some embodiments, in S42, based on the width of the ground building of the subway station air duct, the width of the outer expansion section at the end of the air duct is determined. Setting the outer expansion section is to ensure that there is enough path space in the underground building space of the air duct, enabling access from the underground building space of the air duct to the evacuation exit to ensure the emergency safety of personnel; and the air in the fresh air shaft can flow into the underground building of the air duct to ensure air circulation in the underground building of the air duct. As shown by \(D_{expansion}\) in Figure 6-Figure 7 The brown part in the upper left corner of the figure represents the evacuation exit, and the light blue next to it represents the fresh air shaft. The calculation method of the width of the outer expansion section at the end of the air duct specifically includes: If \(\alpha\geq0^{\circ}\), and \(D\) min \(< A\), then there is no need to set the outer expansion section at the end of the air duct; At this time, the shortest distance \(D\) between the piston air shaft in the ground building of the subway station air duct and the outer contour of the station main body min is less than the threshold value \(A\) of the length of the piston air duct when the emergency fan and muffler in the piston air duct are both inside the station main body. There is already enough path space to allow access from the underground building space of the air duct to the evacuation exit and fresh air shaft for air passage. Therefore, there is no need to set the outer expansion section at the end of the air duct, nor to determine the width of the outer expansion section at the end of the air duct.

[0045] If \(\alpha\geq0^{\circ}\), and \(D\) min \(\geq A\), then it is necessary to set the outer expansion section at the end of the air duct to ensure that there is enough path space to allow access from the underground building space of the air duct to the evacuation exit and fresh air shaft for air passage, as shown in Figure 6 According to the evacuation net width and the air passage area of the fresh air shaft, determine the width \(D\) of the outer expansion section at the end of the air duct 外扩: The larger the evacuation net width, the larger the value of D 外扩 ; the larger the air passing area of the fresh air shaft, the larger the value of D 外扩 ; vice versa, the smaller the value of D 外扩 .

[0046] If α < 0°, and D min < A, then there is no need to set the outward expansion section at the end of the air duct, for the same reason as when α ≥ 0° and D min < A; If α < 0°, and D min ≥ A, and (L u - β) × cosα ≤ L d + β, then there is no need to set the outward expansion section at the end of the air duct; because there is already enough path space at this time, there is no need to set an additional expansion section, nor to determine the width of the outward expansion section at the end of the air duct.

[0047] If α < 0°, and D min ≥ A, and (L u - β) × cosα > L d + β, then it is necessary to set the outward expansion section at the end of the air duct to ensure there is enough path space to allow passage from the underground building space of the air duct to the evacuation opening and the air passing of the fresh air shaft, as Figure 7 shown. Determine the width D of the outward expansion section at the end of the air duct according to the evacuation net width and the air passing area of the fresh air shaft 外扩 : The larger the evacuation net width, the larger the value of D 外扩 ; the larger the air passing area of the fresh air shaft, the larger the value of D 外扩 ; vice versa, the smaller the value of D 外扩 .

[0048] Among them, W u represents the width of the ground building of the subway station air duct, and D 外扩 represents the width of the outward expansion at the end of the air duct.

[0049] S43: Based on the initial design point of the underground building of the subway station air duct, determine the coordinates of each endpoint of the underground building of the subway station air duct according to the shortest distance, the width of the enlarged section at the end of the air duct, the inclination angle, and the internal net length of the interface between the underground building of the air duct and the station main body.

[0050] S5: Design the subway station air duct with the coordinates of each endpoint of the ground building of the subway station air duct and the coordinates of each endpoint of the underground building of the subway station air duct.

[0051] The subway station air duct scale optimization design method provided by this application minimizes the air duct scale and reduces the project cost while meeting the basic functions of the air duct.

[0052] Exemplarily, take Figure 8 This paper takes an example to illustrate the method of calculating the endpoint coordinates of the underground building of the subway station wind duct.

[0053] Points N3 and N4 are the two end points of the underground building of the subway station wind tunnel. The coordinate calculation of point N3 can be done using the following method: X N3X =X 下 ; ; In the formula, X N3X is the X coordinate of point N3 when the tilt angle α≥0°, and Y N3Y It is the Y coordinate of point N3 when the tilt angle α≥0°.

[0054] X N4X =X 下 -L d ; Y N4Y =2D 1 +W+D 2 +δ+DD 外扩 ×cosα; In the formula, X N4X is the X coordinate of point N4 when the tilt angle α≥0°, and Y N4Y It is the Y coordinate of point N4 when the tilt angle α≥0°.

[0055] According to this example, the calculation method of the coordinates of the other end points of the underground building of the subway station air duct is the same as above. The outer contour of the underground building of the air duct is expanded outward by an auxiliary wall thickness γ based on each point of the inner contour.

[0056] In some embodiments, after S5, the process further includes: S6: Determine the location of the subway station evacuation exit based on the subway station air duct, specifically: According to the coordinates of each end point of the underground building of the subway station air duct, the underground building areas of the subway station air duct on the left and right sides are obtained respectively; Get the main area on the left side and the main area on the right side of the subway station respectively; According to the underground building area of ​​the subway station air duct on the left and right sides, the main body area of ​​the subway station on the left and right sides, determine the sum of the area of ​​the underground building of the subway station air duct on the left and right sides and the main body of the subway station on their sides; An evacuation exit of the subway station is arranged on the side where the sum of the areas is larger, thereby completing the determination of the location of the evacuation exit of the subway station.

[0057] The side with the larger total area can be used to set up the studio and other facilities as much as possible to improve space utilization. In order to improve the evacuation ability of the staff in the studio in case of an accident, the subway station evacuation exit is also set up on this side. This will further improve space utilization, reduce project costs, and improve station safety.

[0058] In some embodiments, determining the location of the subway station evacuation exit according to the subway station air duct in S6 further includes: S7: Optimize the scale design of the subway station air duct on the side corresponding to the subway station evacuation exit, where the initial point of the subway station air duct ground building design optimization is determined based on the inclination angle of the subway station air duct ground building and the station line and the evacuation exit width.

[0059] Specifically, if α≥0, the calculation formula for the initial point of the subway station air duct ground building design is: X ‘ 上 = - +β-L u -W 2 ; Y ‘ 上 = ; If α<0, the calculation formula for the initial point of the ground building design of the subway station air duct is: X ‘ 上 = - +β; Y ‘ 上 = ; Among them, X ‘ 上 represents the absolute value of the horizontal coordinate of the initial point of the subway station air duct ground building design optimization, Y ‘ 上 It represents the absolute value of the ordinate of the initial point of the ground building design optimization of the subway station air duct.

[0060] According to the initial point of the ground building design optimization of the subway station air duct, the method of steps S4 and S5 is used to optimize the design of the subway station air duct, so that the design is more suitable for the use scenario.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the technical solutions of the embodiments of the present invention.

Claims

1. A subway station air duct scale optimization design method, characterized in that: The steps include: S1: Determine the initial design point of the subway station air duct ground building according to the inclination angle between the subway station air duct ground building and the station line; S2: Based on the initial design point of the subway station air duct ground building, according to the quadrant where the subway station air duct ground building is located and the outer contour information of the subway station air duct ground building, determine the coordinates of each end point of the subway station air duct ground building; S3: Determine the initial design point of the underground building of the subway station air duct according to the quadrant where the ground building of the subway station air duct is located and the relationship between the station line and the subway station; S4: Based on the initial design point of the subway station air duct underground building, according to the closest distance between the piston air shaft in the subway station air duct ground building and the outer contour of the station body, the width of the air duct ground building and the inclination angle, determine the coordinates of each end point of the subway station air duct underground building; S5: Designing the subway station air duct based on the coordinates of each end point of the ground building of the subway station air duct and the coordinates of each end point of the underground building of the subway station air duct.

2. The subway station air duct scale optimization design method according to claim 1 is characterized in that: In S1, determining the initial design point of the subway station air duct ground building according to the inclination angle between the subway station air duct ground building and the station line includes the following steps: S11: Determine the positive and negative relationship between the inclination angles of the ground building of the subway station air duct and the station line; S12: According to the positive and negative relationship, a calculation method for the initial point of the ground building design of the subway station air duct is selected; S13: Determine the initial point of the ground building design of the subway station air duct according to the calculation method of the selected initial point of the ground building design of the subway station air duct.

3. The subway station air duct scale optimization design method according to claim 2 is characterized in that: In S12, according to the positive and negative relationship, a calculation method for selecting the initial point of the ground building design of the subway station air duct specifically includes: If α≥0, the calculation formula for the initial point of the subway station air duct ground building design is: X 上 =L1-δ+β-L u Y 上 =2D1+W+D2+δ+D; If α<0, the calculation formula for the initial point of the ground building design of the subway station air duct is: X 上 =L1-δ+β; Y 上 =2D1+W+D2+δ+D; Where α is the inclination angle between the ground building of the subway station wind tunnel and the station line, X 上 It represents the absolute value of the horizontal coordinate of the initial point of the ground building design of the subway station air duct, Y 上 It represents the absolute value of the vertical coordinate of the initial point of the ground building design of the subway station air duct. D1 represents the distance between the station line and the edge of the platform. D2 represents the distance between the station line and the inner side of the main outer wall of the subway station. W represents the platform width. L l represents the vertical distance between the terminal mileage line of the subway station and the center mileage line of the platform, δ represents the thickness of the main exterior wall of the subway station, β represents the thickness of the ground building wall of the duct, and L u It represents the length of the ground building of the subway station air duct, and D represents the shortest distance between the ground building of the air duct and the outer edge of the main body of the subway station.

4. The subway station air duct scale optimization design method according to claim 1 is characterized in that: The outer contour information of the ground buildings in the subway station air duct is determined by the relationship information between the station line and the subway station, the area of ​​each ground building in the subway station air duct, and the distance between the buildings, and specifically includes the following steps: S21: Obtain the relationship information between the station line and the subway station, including the distance D1 between the station line and the edge of the platform, the distance D2 between the station line and the inner side of the main outer wall of the subway station, and the platform width. , the vertical distance L between the starting mileage line of the subway station and the mileage line of the center of the platform r , the vertical distance L between the terminal mileage line of the subway station and the center mileage line of the platform l , the thickness of the main exterior wall of the subway station δ; S22: Obtain the area and building spacing of each ground building in the subway station wind tunnel; S23: Determine the outer contour information of the ground building of the subway station air duct according to the relationship information between the station line and the subway station, the area of ​​each ground building of the subway station air duct and the distance between the buildings; the outer contour information of the ground building of the subway station air duct includes the length L of the ground building of the subway station air duct u and width W u .

5. The subway station air duct scale optimization design method according to claim 4 is characterized in that: In S3, according to the quadrant where the ground building of the subway station air duct is located and the relationship information between the station line and the subway station, the initial point of the design of the underground building of the subway station air duct is determined, which specifically includes: S31: According to the relationship information between the station line and the subway station, determine the absolute value of the horizontal coordinate and the absolute value of the vertical coordinate of the initial point of the underground building design of the subway station wind tunnel, and the calculation formula is: X 下 =L r -d; Y 下 =2D1+W+D2+δ+W1; Where, X 下 represents the absolute value of the horizontal coordinate of the initial point of the underground building design of the subway station air duct, Y 下 It represents the absolute value of the ordinate of the initial point of the underground building design of the subway station wind tunnel, and W1 represents the outer expansion width of the shield section; S32: Based on the quadrant where the subway station air duct ground building is located, the absolute value of the horizontal coordinate and the absolute value of the vertical coordinate of the initial design point of the subway station air duct underground building are assigned corresponding positive and negative values ​​to obtain the initial design point of the subway station air duct underground building.

6. The subway station air duct scale optimization design method according to claim 1 is characterized in that: In the S4, based on the design initial point of the subway station air duct underground building, according to the closest distance between the piston air shaft in the subway station air duct ground building and the outer contour of the station body, the width of the air duct ground building and the inclination angle, the coordinates of each end point of the subway station air duct underground building are determined, specifically including: S41: Obtain the closest distance between the piston air shaft in the ground building of the subway station air duct and the outer contour of the station body, and compare the closest distance with the piston air duct length threshold, and determine the inner net length of the interface between the underground building of the air duct and the station body according to the comparison result; S42: Determine the width of the outward expansion section at the end of the air duct based on the width of the ground building of the subway station air duct; S43: Based on the initial design point of the subway station air duct underground building, determine the coordinates of each end point of the subway station air duct underground building according to the shortest distance, the width of the outward expansion section of the air duct end, the inclination angle, and the inner net length of the interface between the air duct underground building and the station body.

7. The subway station air duct scale optimization design method according to claim 6 is characterized in that: In the S41, the closest distance between the piston air shaft in the ground building of the subway station air duct and the outer contour of the station body is obtained, and the closest distance is compared with the piston air duct length threshold, and the inner net length of the interface between the underground building of the air duct and the station body is determined according to the comparison result, specifically: S411: Based on the tilt angle, the shortest distance between the piston air shaft in the ground building of the subway station air duct and the outer contour of the station body is obtained: If α≥0°, then D min =D+(L u -M)×sinα; If α<0°, then D min =D; Among them, D min is the shortest distance between the piston air shaft in the subway station air duct ground building and the outer contour of the station body, D is the shortest distance between the air duct ground building and the outer edge of the subway station body, M is the total length of the two piston air shafts and their distance in the air duct ground building, α is the inclination angle between the subway station air duct ground building and the station line, L u is the length of the ground building of the subway station air duct; S412: Compare the shortest distance with the piston air duct length threshold, and determine the inner net length of the interface between the air duct underground building and the station body according to the comparison result: If D min < A, then L d = L u - 2β; If A≤D min B, then L d =P; If D min ≥B, then L d =Q; Among them, L d represents the inner net length of the interface between the underground building of the air duct and the main body of the station, β represents the thickness of the wall of the ground building of the air duct, A represents the piston air duct length threshold when the accident fan and muffler in the piston air duct are both inside the main body of the station, B represents the piston air duct length threshold when the accident fan and muffler in the piston air duct are both inside the main body of the station, P represents the net length of the interface between the station air duct and the main body of the station when there is only one set of accident fans and mufflers in the piston air duct inside the main body of the station, Q represents the net length of the interface between the station air duct and the main body of the station when the accident fans and mufflers in two sets of piston air ducts are both inside the main body of the station, and A<B, L u -2β>P>Q.

8. The subway station air duct scale optimization design method according to claim 7 is characterized in that: In the above S42, based on the width of the ground building of the subway station air duct, the width of the outward expansion section at the end of the air duct is determined, which specifically includes: If α ≥ 0°, and D min < A, then there is no need to set an outward expansion section at the end of the air duct; If α≥0°, and D min ≥A, it is necessary to set up an outward expansion section at the end of the duct; according to the clear evacuation width and the wind area of ​​the fresh air well, determine the width D of the outward expansion section at the end of the duct 外扩 ; If α < 0°, and D min < A, then there is no need to set an outward extension section at the end of the air duct; If α<0°, and D min ≥A, and (L u -β)×cosα≤L d +β, there is no need to set the end expansion section of the air duct; If α<0°, and D min ≥A, and (L u -β)×cosα>L d +β, it is necessary to set an outward expansion section at the end of the duct; according to the clear evacuation width and the wind area of ​​the fresh air well, determine the width D of the outward expansion section at the end of the duct 外扩 ; Among them, W u Indicates the width of the ground building of the subway station air duct, D 外扩 Indicates the external expansion width of the air duct end.

9. The subway station air duct scale optimization design method according to claim 1 is characterized in that: After S5, the location of the subway station evacuation exit is determined according to the subway station air duct, specifically: According to the coordinates of each end point of the underground building of the subway station air duct, the underground building areas of the subway station air duct on the left and right sides are obtained respectively; Get the main area on the left side and the main area on the right side of the subway station respectively; According to the underground building area of ​​the subway station air duct on the left and right sides, the main body area of ​​the subway station on the left and right sides, determine the sum of the area of ​​the underground building of the subway station air duct on the left and right sides and the main body of the subway station on their sides; An evacuation exit of the subway station is arranged on the side where the sum of the areas is larger, thereby completing the determination of the location of the evacuation exit of the subway station.

10. The subway station air duct scale optimization design method according to claim 9, characterized in that: After determining the location of the subway station evacuation exit, it also includes: Optimize the scale design of the subway station air duct on the side corresponding to the subway station evacuation exit. The initial point of the subway station air duct ground building design is determined according to the inclination angle between the subway station air duct ground building and the station line, as well as the width of the evacuation exit.

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