CN111118989A - Method for standardizing A-type single-horn intercommunication design of highway - Google Patents
Method for standardizing A-type single-horn intercommunication design of highway Download PDFInfo
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- CN111118989A CN111118989A CN201911420176.1A CN201911420176A CN111118989A CN 111118989 A CN111118989 A CN 111118989A CN 201911420176 A CN201911420176 A CN 201911420176A CN 111118989 A CN111118989 A CN 111118989A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C1/00—Design or layout of roads, e.g. for noise abatement, for gas absorption
- E01C1/002—Design or lay-out of roads, e.g. street systems, cross-sections ; Design for noise abatement, e.g. sunken road
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C1/00—Design or layout of roads, e.g. for noise abatement, for gas absorption
- E01C1/04—Road crossings on different levels; Interconnections between roads on different levels
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Abstract
The invention discloses a method for standardizing A-type single-horn intercommunication design of a highway, which comprises the steps of classifying the types of A-type single-horn intercommunication ramps, determining the standard form of each type of ramp plane line element combination, giving the recommended value of each design parameter in the standard form line element combination, and selecting the recommended value of the standardized parameter according to the design condition, thereby realizing the design standardization of the interchange type interchange. The invention provides a recommended value of design parameters of a basic section of an A-type single-horn intercommunication ramp, wherein the recommended value can guide the selection of the design parameters of the basic section of the A-type single-horn intercommunication ramp; the design efficiency of the A-type single-horn intercommunication can be improved, and the control of the design quality is facilitated; the difference of the A-type single-horn intercommunication design results can be controlled, and a foundation is laid for A-type single-horn intercommunication assembly type construction, BIM technical application and the like.
Description
Technical Field
The invention belongs to the technical field of standardization, and relates to a method for standardizing A-type single-horn intercommunication design of a highway.
Background
The intercommunicated type solid intersection (hereinafter referred to as intercommunicated) is used as an important node of a road network for improving the operation efficiency and a passage for turning traffic flow to turn smoothly and efficiently, and has a great proportion in an expressway network.
Two problems exist with current interworking designs: firstly, due to the mutual restriction between an intercommunicating main line and a ramp and between ramps, the selection of design parameters is very difficult, and in addition, the selection of intercommunicating design indexes needs to comprehensively consider various factors, so that a designer is difficult to grasp, the intercommunicating design efficiency is lower, and the design quality is difficult to ensure; secondly, due to the difference of design concepts, design experiences and the like of designers, even if the same design task is faced, the difference of design results is often larger, and therefore the repetitive work in the design and construction of subsequent bridges, handing over and security facilities and the like is increased.
The realization of the intercommunication design standardization can improve the intercommunication design efficiency and ensure the intercommunication design quality on one hand, thereby enhancing the rationality and scientificity of the intercommunication design; on the other hand, the difference of the design results can be controlled, and a foundation is laid for the effective combination of the intercommunicated factory production, the assembly type construction and the BIM technology. For the highway industry, the research of design standardization mainly focuses on bridge and culvert design, retaining wall design, highway traffic safety facility design and the like, a series of common drawings exist, and the research of intercommunication design standardization is still blank. Therefore, it is necessary to provide a standardized design method for the basic section of the a-type single-horn intercommunication ramp.
Disclosure of Invention
The invention aims to solve the problem of the blank research of intercommunication design standardization in the prior art and provides a method for the intercommunication design standardization of an A-type single horn of a highway. The method can improve the efficiency of intercommunication design, ensure the quality of intercommunication design and reduce the difference of the result of intercommunication design, thereby laying a foundation for intercommunication standardized construction and standardized management.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
a method for standardizing A-type single-horn intercommunication design of a highway comprises the following steps:
(1) collecting A-type single-horn intercommunication design data;
(2) classifying the type of the A-type single-horn intercommunication ramp;
(3) analyzing the combination mode of each type of ramp line elements, and constructing an A-type single-horn intercommunication standardized model;
(4) classifying ramp design parameters, and determining an A-type single-horn intercommunication standardized parameter;
(5) determining a standardized parameter recommendation value;
(6) and selecting a standardized parameter recommended value according to the design condition.
The invention is further improved in that:
the interworking design data in step (1) includes interworking design specifications, plan views, general views, longitudinal section views and standard cross section views.
And (3) in the step (2), the number of the A-type single-horn intercommunication ramps is 5, and the A-type single-horn intercommunication ramps comprise 1 annular ramp, 1 semi-direct-connection ramp, 1 connecting ramp and 2 direct-connection ramps.
The specific method for constructing the A-type single-horn intercommunication standardized model in the step (3) is as follows:
2 line element combination modes are set for 5 ramps and are respectively marked as a line element combination 1 and a line element combination 2; respectively counting the proportion of each type of ramp line element combination 1 and line element combination 2 based on the design data collected in the step (1), and determining the line element combination mode with the larger proportion as a standard line element combination mode; and combining the A-type single-horn intercommunication 5 ramp standardized line element combination modes with each other to obtain the A-type single-horn intercommunication standardized model.
The ramp design parameters in the step (4) comprise three types of independent parameters, non-independent parameters and control parameters, wherein the independent parameters comprise design speed, radius of a circular curve and parameters of a relaxation curve; the dependent parameters comprise cross section parameters, speed change lane length, circular curve superelevation and circular curve widening; the control parameters include linear combination coordination, longitudinal slope, vertical curve radius, nose design parameters and visual range.
And (5) the normalized parameter recommended value comprises a circular curve radius and a gentle curve parameter.
A. Counting the value ranges of the radius of each ramp circle curve and the parameters of a relaxation curve in the A-type single-horn intercommunication standardized model determined in the step (3) based on the design data collected in the step (1), analyzing the value ranges of the parameters by using a box diagram, wherein the upper limit and the lower limit of each parameter value range are respectively 75% quantiles and 25% quantiles of the parameters;
B. optimizing the radius and the gentle curve parameters of the circular curve by adopting a genetic algorithm, wherein the basic parameter values, the target optimization function and the constraint conditions of the genetic algorithm are determined; looking up relevant documents to determine a basic parameter value, and selecting the basic parameter value according to the general value of a basic parameter of a genetic algorithm; the target optimization function is the ramp length; the constraint conditions comprise relevant standard regulations and safe driving requirements; firstly, optimizing an annular ramp, and taking an optimized result of the annular ramp as a wiring condition of a semi-direct-connection ramp and a connection ramp;
C. the parameters of the interchange are adjusted to be multiples of 5 during design, the optimization result is adjusted according to the principle, and the recommended values of the design parameters of all planes of all ramps are determined.
The design conditions in the step (6) comprise design speed, height difference and crossing angle.
Compared with the prior art, the invention has the following beneficial effects:
the invention discloses a method for standardizing A-type single-horn intercommunication design of a highway, which statistically analyzes linear combination modes of A-type single-horn intercommunication of all ramps so as to determine the standardized linear combination modes of A-type single-horn intercommunication of all ramps. On the basis of standardized linear combination, a genetic algorithm is introduced to optimize each ramp design parameter, and finally, recommended values of design parameters of each ramp basic section communicated by the A-type single-horn are given, and the recommended values can guide the selection of the design parameters of the A-type single-horn communicated ramp basic section; the design efficiency of the A-type single-horn intercommunication can be improved, and the control of the design quality is facilitated; the difference of the A-type single-horn intercommunication design results can be controlled, and a foundation is laid for A-type single-horn intercommunication assembly type construction, BIM technical application and the like. In addition, in the process of determining the recommended value of the design parameter of each ramp communicated by the A-type single horn, the design parameter value meets the standard requirement, and linear coordination and the like are also considered.
Drawings
FIG. 1 is a flow chart of a method for standardizing a highway type A single-horn intercommunication design of the present invention;
FIG. 2 is a schematic view of a type A single horn intercommunication ramp of the present invention;
FIG. 3 is a schematic diagram of the A-type single-horn interchange standardized line element combination of the present invention;
FIG. 4 shows the ratio of the combination 1 and the combination 2 of the ring ramp elements in embodiment 1 of the present invention;
fig. 5 shows statistical results of design parameters of ring ramp planes in embodiment 1 of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention:
as shown in fig. 1, the method for standardizing the a-shaped single-horn intercommunication design of the highway comprises the following steps:
(1) a large amount of type A single-horn intercommunication design data (such as 100 seats) is collected.
(2) The ramp with the A-type single horn intercommunication is divided into four types of ring ramps, semi-direct-connection ramps, direct-connection ramps and connection ramps, and is shown in detail in figure 2.
(3) Two line element combination modes are drawn for each type of ramp and are respectively marked as a line element combination 1 and a line element combination 2, finally, the proportion of the line element combination 1 and the line element combination 2 of each type of ramp is respectively counted, the larger proportion is determined as a standardized line element combination mode, and an A-type single-loudspeaker intercommunication standardized model is obtained, which is shown in detail in figure 3.
(4) And dividing the intercommunicated design parameters into three types of independent parameters, dependent parameters and control parameters according to the constraint relation among the intercommunicated design parameters, wherein the independent parameters and the dependent parameters can realize design standardization, and the control parameters are used for checking the rationality of the design standardization parameters. The non-independent parameters can be determined according to the independent parameters, and the ramp design speed in the independent parameters is often determined before design, so that the A-type loud speaker intercommunication standardized parameters are determined as circular curve radius and gentle curve parameters.
(5) Statistically analyzing the value ranges of the radius of each ramp circular curve and the parameters of a relaxation curve in the A-type single-horn intercommunication standardized model based on the design data collected in the step (1); based on the statistical result, a genetic algorithm is introduced to optimize the radius and the gentle curve parameters of the circular curve; and finally, adjusting the optimization result according to the multiple of 5 to determine the optimization result as a standard parameter recommended value.
(6) And selecting a standardized parameter recommended value according to the design condition.
The method is described below by taking an example of an a-type single-horn intercommunicated ring ramp, and the specific process is as follows:
example 1:
(1) method for determining standard line element combination mode of A-type single-horn intercommunication ring ramp
The design data of 100A-type single-horn intercommunicating units, including intercommunicating design description, plan view, general view, longitudinal cross-sectional view, standard cross-sectional view, etc., are collected. The intercommunicating design data is mainly obtained by design houses, and each design house has engineering design comprehensive first-level quality or provincial design houses of each provincial transportation industry and can basically represent the top level of domestic intercommunicating design and the selection habit of intercommunicating design parameters.
(2) The ramp with the A-type single horn intercommunication is divided into four types, namely an annular ramp, a semi-direct-connection ramp, a direct-connection ramp and a connection ramp.
(3) Two line element combinations are drawn up for the ring ramp by combining with the design data, and are shown in table 1:
TABLE 1A-TYPE COMBINATION OF SINGLE HORN INTERCONNECTING ELEMENTS
And (4) counting the proportion of the combination 1 of the ring-shaped ramp line elements and the combination 2 of the line elements, wherein the counting result is shown in figure 4. The statistical result shows that the wire element combination 1 in the ring ramp accounts for about 86%, which indicates that the designer will preferentially adopt the wire element combination mode, so that the wire element combination can be used as the standardized wire element combination of the ring ramp. A schematic diagram of the standardized line element combination of the determined a-type single-horn intercommunicating ramps is shown in fig. 3.
(4) And dividing the intercommunicated design parameters into three types of independent parameters, dependent parameters and control parameters according to the constraint relation among the intercommunicated design parameters, wherein the independent parameters and the dependent parameters can realize design standardization, and the control parameters are used for checking the rationality of the design standardization parameters. Because the dependent parameters can be determined according to the independent parameters and the ramp design speed in the independent parameters is often determined before design, the A-type large horn intercommunication standardized parameters are determined as the radius of a circular curve and the gentle curve parameters, and the A-type single horn intercommunication parameters are classified and detailed in a table 2.
TABLE 2A-TYPE SINGLE HORN INTERPERCEMENT PARAMETER CLASSIFICATION TABLE
(5) Determining a recommended value of a standardized parameter of an A-type single-horn intercommunication loop ramp
The method for determining the standardized parameter recommendation value of the A-type single-horn intercommunication loop ramp mainly comprises the following steps: and (4) determining a parameter optimization range, optimizing the parameters, adjusting the parameters and determining a standardized parameter recommendation value by parameter statistical analysis.
A. And determining the optimization range of the parameters. According to the step (1), the design parameter needing to be optimized for the ring-shaped ramp is A1、R1、A2. Since the value of the design parameter is related to the design speed, the design speed should be determined first. The analysis of the collected design data shows that the design speed of the A-type single-horn intercommunication ramp is more 40km/h becauseDuring the statistics, the ramps with the design speed not being 40km/h are rejected. FIG. 5 shows a ring ramp A1、R1、A2The upper and lower sides of the rectangle represent 75% quantiles and 25% quantiles, respectively, which are determined as A1、R1、A2Is a value range of1、R1、A2Respectively has a value range of [70,80 ]]、[52,60]And [85,100 ]]. The optimization ranges of other ramp parameters determined according to the above steps are shown in table 3.
TABLE 3 optimization Range of other ramp parameters
B. Parameter optimization
The basic parameters of the genetic algorithm can be determined according to common values. The basic parameters of the genetic algorithm are detailed in a table 4, and the iteration times can be 200 times.
TABLE 4 genetic Algorithm parameter selection Table
Ring ramp target optimization function:
Max(fitvalue(i))＝500-(Ls1(i)+Ls2(i)+Lr(i)) (1)
in the formula: i-is the number of iterations;
ls1(i), Ls2(i) — relaxation curve 1 and relaxation curve 2 lengths in the ith iteration;
lr (i) -the length of the circular curve in the ith iteration;
max () -Max function.
And determining constraint conditions during parameter optimization according to the standard requirements and the driving safety requirements. Including minimum circle curve radius, minimum length of the easement curve, minimum parameter of the easement curve, maximum longitudinal slope and the like, easement curve deflection angle, linear harmony, driving sight distance and the like. The loop ramps and other ramp constraints are detailed in table 5.
TABLE 5 Loop ramps and other ramp constraints
Note: rBig (a)、RSmallThe radii of the large and small circles in the oval curve are shown, respectively.
After the parameter setting is finished, the parameters of the ring ramps can be optimized by adopting a genetic algorithm and the ring ramps A can be determined1、R1、A2The optimization result of (2).
C. Determining standardized recommended value of each parameter design
Obtaining the ring ramp A according to the step (3)1、R1、A2The optimization results, as shown in table 6, are then rounded by integer multiples of 5 for each design parameter, and the ring ramp a1、R1、A2The recommended values are shown in Table 7.
TABLE 6 Ring ramp A1、R1、A2Optimizing results
TABLE 7 Ring ramp A1、R1、A2Recommended value
And (5) repeating the step (5) to obtain recommended values of other ramp standardized parameters, wherein the recommended values of the other ramp standardized parameters are detailed in tables 8-10.
TABLE 8 recommended values of semi-direct-connection type ramp standardized parameters
TABLE 9 Standard connection ramp parameter recommendation
TABLE 10 normalized recommended values of direct-connected ramp parameters
(6) Selecting a recommended value of a standardized parameter according to design conditions
The standard parameters of the ring ramps are fixed, and the plane design drawing can be directly carried out according to the recommended values of the standard parameters of the ring ramps given in the table 7. The semi-direct connection type ramp standardization parameters are also relatively fixed and can be directly determined according to the table 8. The standardized parameter values of the linear ramp and the connecting ramp are related to the crossing angle and the height difference, and the corresponding design parameter values can be determined by a table 9 and a table 10 according to the determined crossing angle and the determined height difference during design.
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (8)
1. A method for standardizing A-type single-horn intercommunication design of a highway is characterized by comprising the following steps:
(1) collecting A-type single-horn intercommunication design data;
(2) classifying the type of the A-type single-horn intercommunication ramp;
(3) analyzing the combination mode of each type of ramp line elements, and constructing an A-type single-horn intercommunication standardized model;
(4) classifying ramp design parameters, and determining an A-type single-horn intercommunication standardized parameter;
(5) determining a standardized parameter recommendation value;
(6) and selecting a standardized parameter recommended value according to the design condition.
2. The method of claim 1, wherein the interworking design information in step (1) includes interworking design specifications, plan views, general views, longitudinal section views and standard cross section views.
3. The method according to claim 1, wherein the number of the a-type single-horn intercommunication ramps in the step (2) is 5, and the a-type single-horn intercommunication ramps include 1 ring ramp, 1 semi-direct ramp, 1 connecting ramp and 2 direct ramps.
4. The method for standardizing a type-A single-horn intercommunication design of a highway according to claim 3, wherein the specific method for constructing the type-A single-horn intercommunication standardization model in the step (3) is as follows:
2 line element combination modes are set for 5 ramps and are respectively marked as a line element combination 1 and a line element combination 2; respectively counting the proportion of each type of ramp line element combination 1 and line element combination 2 based on the design data collected in the step (1), and determining the line element combination mode with the larger proportion as a standard line element combination mode; and combining the A-type single-horn intercommunication 5 ramp standardized line element combination modes with each other to obtain the A-type single-horn intercommunication standardized model.
5. The method for standardizing a type-a single-horn intercommunication design of a highway of claim 3 wherein the ramp design parameters in step (4) include three types of independent parameters, dependent parameters and control parameters, the independent parameters including design speed, radius of circular curve and easement curve parameters; the dependent parameters comprise cross section parameters, speed change lane length, circular curve superelevation and circular curve widening; the control parameters include linear combination coordination, longitudinal slope, vertical curve radius, nose design parameters and visual range.
6. The method of claim 3, wherein the recommended values of the standardized parameters in step (5) comprise a radius of a circular curve and a gentle curve parameter.
7. The method for standardizing a type a single-horn intercommunication design of a highway according to claim 6 wherein the determination of the radius of the circular curve and the parameters of the blend curve is as follows:
A. counting the value ranges of the radius of each ramp circle curve and the parameters of a relaxation curve in the A-type single-horn intercommunication standardized model determined in the step (3) based on the design data collected in the step (1), analyzing the value ranges of the parameters by using a box diagram, wherein the upper limit and the lower limit of each parameter value range are respectively 75% quantiles and 25% quantiles of the parameters;
B. optimizing the radius and the gentle curve parameters of the circular curve by adopting a genetic algorithm, wherein the basic parameter values, the target optimization function and the constraint conditions of the genetic algorithm are determined; looking up relevant documents to determine a basic parameter value, and selecting the basic parameter value according to the general value of a basic parameter of a genetic algorithm; the target optimization function is the ramp length; the constraint conditions comprise relevant standard regulations and safe driving requirements; firstly, optimizing an annular ramp, and taking an optimized result of the annular ramp as a wiring condition of a semi-direct-connection ramp and a connection ramp;
C. the parameters of the interchange are adjusted to be multiples of 5 during design, the optimization result is adjusted according to the principle, and the recommended values of the design parameters of all planes of all ramps are determined.
8. The method for standardizing a type a single-horn intercommunication design for a highway according to claim 1 wherein the design conditions in step (6) include design speed, head height and crossing angle.
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