CN107908820B - Method for designing parallel cross section of road - Google Patents
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Abstract
The invention discloses a method for designing a parallel cross section of a road, which comprises the following steps; firstly, selecting a main design line (1) and a secondary design line (2) which need to be designed in parallel; secondly, setting sections of the main design line (1) and the secondary design line (2) which need to be parallel; calculating according to the line position relation of the main design line (1) and the secondary design line (2), carrying out segmentation processing on the main design line (1), and obtaining each subsection main line (1.1) and a corresponding subsection sub-line (2.1); the method overcomes the defect that the side slope and the side ditch of the cross section are difficult to accurately express by using a two-dimensional graph in the prior art, and has the advantage of improving the accuracy of parallel design.
Description
Technical Field
The invention relates to the field of road cross section design, in particular to a method for designing a parallel cross section of a road.
Background
In the design of highways, due to the restrictions of terrain and geological conditions or the requirements of tunnel arrangement, two proposed highways with close distances often appear, such as left and right half-widths of a separated roadbed, and a ramp and a main line of an interchange. The cross sections of the proposed road often interfere with each other, so that the slope, the gutter and the drainage between the two need to be synthesized for design in the design process.
Because of the irregularity of the horizontal distance and the vertical height difference between the two proposed roads, the side slopes and the side ditches between the two proposed roads are actually three-dimensional curved surface entities in a space, and are difficult to accurately express by using a uniform mathematical model. Therefore, the cross-sectional slope and the groove between the two are difficult to be accurately expressed by a two-dimensional graph.
At present, one design line is taken as a main design line, and the other design line is taken as a secondary design line. And a cross section obtained by intersecting the cross section of the cross section line (namely the perpendicular line) with the other design line is the cross section of the other design line.
The conventional method at present comprises the following steps: firstly, determining parallel design paragraphs, then drawing a multi-section line between a main design line and a secondary design line, and respectively solving the stake number of the corresponding main design line and the stake number of the secondary design line according to the multi-section line. Due to the fact that drawn multi-segment lines are irregular, the deviation of drawing of the multi-segment lines can directly influence the pile numbers of the main design line and the secondary design line obtained through calculation.
Disclosure of Invention
The invention aims to overcome the defects of the background technology and provides a method for designing a road parallel cross section
The aim of the invention is achieved by the following measures: a method for designing a parallel cross section of a road comprises the following steps;
firstly, selecting a main design line and a secondary design line which need to be designed in parallel;
secondly, setting sections of the main design line and the secondary design line which need to be parallel;
calculating according to the line position relation of the main design line and the secondary design line, performing segmentation processing on the main design line, and acquiring each sub-section main line and a corresponding sub-section sub-line;
fourthly, parallel design is carried out on the sub-section main lines and the corresponding sub-section sub-lines in sequence;
acquiring a side ditch and a side slope assembly on one side of the subsection falling main line close to the subsection falling sub line; calculating the pile number on the corresponding subsection subline according to the existing pile point number on the section center of the subsection subline, and simultaneously acquiring a side ditch and a side slope assembly on one side of the subsection subline close to the subsection subline;
sixthly, calculating the intersection point by utilizing the pile point numbers of the subsection main line and the subsection secondary line at the offset line at the section in the fifth step, and judging whether to be parallel or not according to the intersection point;
calculating bias lines of the road width edge at one side adjacent to the main design line and the secondary design line, and if an intersection point exists between the two bias lines, performing parallel design;
b, calculating bias lines of the top and bottom of the side slope on the adjacent side of the main design line and the secondary design line respectively, and solving whether two bias lines have intersection points or not, wherein if two or more than two intersection points exist, the number of the cross section pile point in the intersection point range is relatively short, and parallel design is needed;
c, if the slope is brushed according to the filling direction or the excavation direction, when the distance between the edges of the adjacent sides of the main design line and the secondary design line is smaller than the minimum width required by at least one side ditch and two side slopes in the design, automatically changing the design method into brushing the slope from the high side to the low side;
calculating intersection, and projecting the road width, the side ditch and the side slope component corresponding to one side of the pile number A in the main design line onto a plane to form a straight line L1 vertical to the main design line, and projecting the road width, the side ditch and the side slope component corresponding to the pile number X obtained in the secondary design line onto the plane to form a straight line L2 vertical to the secondary design line; an intersection point X formed by the L1 and the L2 is an effective intersection point P if the X is in the roadbed edge range of the main design line and the secondary design line, and an accurate parallel pile number on the secondary design line can be calculated according to the intersection point P;
eighthly, respectively calculating pile numbers A and C on the corresponding main design line and the secondary design line according to the intersection point P in the step seventhly, and respectively installing road width, side ditches and side slope components according to the pile numbers to finish a group of parallel designs;
ninthly, obtaining a regular boundary line according to the intersection points P1 and P2 … … Pn in the step (c).
In the above technical scheme: in the step (sixthly); the concrete mode of excavation and slope brushing is as follows: digging side ditches are respectively arranged on the adjacent sides of the main design line and the secondary design line, then the slope brushing is respectively carried out according to the digging side slopes, and a line, namely a boundary line, can be formed in the middle of the side slopes on the two sides.
In the above technical scheme: in the step (sixthly); the concrete mode of filling and slope brushing is as follows: and brushing slopes on the edges of the roadbed on the adjacent sides of the main design line and the secondary design line according to filling slopes, and converging the slopes in the middle to form a line, namely a boundary line, wherein a side ditch is arranged on the boundary line.
In the above technical scheme: the concrete mode of high-direction and low-direction slope brushing is as follows: when the main design line and the secondary design line have a high side and a low side; and arranging a side ditch at the edge of the roadbed at the lower side, and brushing a slope from the high side to the low side to form a side slope.
In the above technical scheme: in step (c), if the intersection point P is not the valid intersection point, a new straight line L2 and L1 are continuously formed within the range of moving the X pile number back and forth by 20 meters on the secondary design line to calculate the intersection point.
In the above technical scheme: in the step (sixthly); and calculating the bias lines of the road width edge on one side adjacent to the main design line and the secondary design line, wherein if two or more intersection points exist in the two bias lines, the number of the cross section pile points in the intersection point range is closer, and parallel design is not needed.
The invention has the following advantages: 1. the invention provides three parallel design modes to solve the problem of the side slope and the side ditch of two design lines, and simplifies the complex three-dimensional roadbed relation to a two-dimensional drawing. 2. The parallel design adopts full-automatic design, and designers can automatically carry out the parallel design according to the parameters only by filling the range of the pile number of the initial point, setting the relevant parameters of slope brushing and processing modes of various conditions, thereby greatly reducing the working time of the designers and improving the design efficiency. 3. The invention also optimizes the problems of random design and low accuracy of the conventional method and improves the accuracy of parallel design.
Drawings
FIG. 1 is a line bitmap of two lines designed in parallel.
FIG. 2 is a group of parallel design structure layout diagram with both sides brushed according to respective filling slopes.
FIG. 3 is a group of parallel design structure layout diagram with both sides brushed according to respective excavation slopes.
FIG. 4 is a layout diagram of a group of parallel design structures for brushing slopes from high to low.
FIG. 5 is a parallel design plane flow diagram.
FIG. 6 is a schematic plan view of a parallel design.
FIG. 7 is a plan effect diagram of a parallel design.
In the figure: the main design line 1, the subsection main line 1.1, the sub design line 2, the subsection sub line 2.1, the side ditch 3, the side slope 4, the road width 5, the boundary line 6 and the roadbed 7.
Detailed Description
The embodiments of the present invention will be described in detail with reference to the accompanying drawings, but the invention is not limited thereto, and is given by way of example only; while the advantages of the invention will be apparent and readily appreciated by the description.
The precondition for the parallel design of two different design lines is that the left and right sides of the two lines are designed with normal cross sections, and road width, side slope and side ditch components are respectively installed.
Referring to FIGS. 1-7: a method for designing a parallel cross section of a road comprises the following steps;
firstly, selecting a main design line 1 and a secondary design line 2 which need to be designed in parallel;
secondly, setting paragraphs needing to be paralleled on the main design line 1 and the secondary design line 2;
calculating according to the line position relation of the main design line 1 and the secondary design line 2, performing segmentation processing on the main design line 1, and acquiring a main line 1.1 of each sub-paragraph and a corresponding sub-paragraph secondary line 2.1;
fourthly, sequentially designing the sub-section main line 1.1 and the corresponding sub-section sub-line 2.1 in parallel one by one in the third step;
acquiring side ditch 3 and side slope 4 assemblies at one side of the subsection falling main line 1.1 close to the subsection falling secondary line 2.1; calculating the pile number on the corresponding subsection secondary line 2.1 according to the existing pile point number on the center of the section of the subsection primary line 1.1, and simultaneously acquiring a side ditch 3 and a side slope 4 assembly on one side of the subsection secondary line 2.1 close to the subsection primary line 1.1;
sixthly, calculating the intersection point by utilizing the pile point number of the subsection falling main line 1.1 and the subsection falling secondary line 2.1 at the offset line at the section in the fifth step, and judging whether to be parallel or not according to the intersection point;
calculating bias lines at the edge of a road width 5 at one side adjacent to the main design line 1 and the secondary design line 2, and if an intersection point exists between the two bias lines, performing parallel design;
b, respectively calculating bias lines of the top and bottom of the slope 4 on one side adjacent to the main design line 1 and the secondary design line 2, and determining whether two bias lines have an intersection point, wherein if two or more than two intersection points exist, the number of cross-section pile points in the intersection point range is relatively close, and parallel design is required;
c, if the slope is brushed according to the filling direction or the excavation direction, when the distance between the edges of the adjacent sides of the main design line 1 and the secondary design line 2 is smaller than the minimum width required by at least one side ditch 3 and two side slopes 4 in the design, automatically changing the design method into the slope brushing from the high side to the low side;
d, if the slope is brushed according to filling or excavation or from high to low, when the distance between the edges of the adjacent sides of the main design line 1 and the secondary design line 2 is larger than the maximum width required by the two side ditches 3 and the two side slopes 4 in the design, the parallel design is not required;
seventhly, calculating intersection, and projecting road width 5, side ditch 3 and side slope 4 components corresponding to one side of the pile number A in the main design line 1 onto a plane to form a straight line L1 vertical to the main design line 1, and projecting road width 5, side ditch 3 and side slope 4 components corresponding to the pile number X obtained on the secondary design line 2 onto the plane to form a straight line L2 vertical to the secondary design line 2; an intersection point X formed by L1 and L2 (wherein B, C, D pile point numbers are front and rear pile numbers of X pile point numbers, and vertical line trial calculation is carried out on accurate parallel pile numbers, wherein B, D pile point numbers exceed the intersection range of A pile numbers and are regarded as invalid intersection points, and a C pile point number is P, and a secondary design line 2 is carried out on P and is regarded as a secondary line vertical line trial calculation, and the auxiliary line vertical line trial calculation is shown in figure 5);
eighthly, respectively calculating pile numbers A and C on the corresponding main design line 1 and the corresponding secondary design line 2 according to the intersection point P in the step seventhly, and respectively installing road width 5, side ditch 3 and side slope 4 components according to the pile numbers to finish a group of parallel designs;
ninthly, a regular boundary line 6 is obtained according to the intersection points P1 and P2 … … Pn in the step (c) (see fig. 7).
In the step (sixthly); the concrete mode of excavation and slope brushing is as follows: and excavating side ditches 3 are respectively arranged on the adjacent sides of the main design line 1 and the secondary design line 2, then brushing is respectively carried out according to the excavating side slopes 4, and a line, namely a boundary line 6 is formed between the side slopes 4 on the two sides.
In the step (sixthly); the concrete mode of filling and slope brushing is as follows: brushing slopes on the edges of the roadbed 7 on the adjacent sides of the main design line 1 and the secondary design line 2 according to the filling side slope 4, and converging the slopes in the middle to form a line, namely a boundary line 6, wherein the boundary line 6 is provided with a side ditch 3.
The concrete mode of high-direction and low-direction slope brushing is as follows: when the main design line 1 and the secondary design line 2 are high on one side and low on one side; and a side ditch 3 is arranged at the edge of the roadbed 7 at the lower side, and a side slope 4 is formed by brushing the slope from the high side to the low side.
Referring to FIG. 7, shown in the circular area: when the overlapped or crossed part exists between the roadbed edges at the adjacent sides of the main design line 1 and the secondary design line 2, the two design lines are considered to be too close to each other, and parallel design is not needed;
referring to FIG. 7, shown in the rectangular area: when the distance between the roadbed edges at the adjacent sides of the main design line 1 and the secondary design line 2 is smaller than the minimum width required by at least one side ditch 3 and two side slopes 4, the design method is automatically changed into brushing slopes from high to low;
referring to fig. 7 shown in hexagonal area: when the distance between the roadbed edges of the adjacent sides of the main design line 1 and the secondary design line 2 exceeds the maximum width required by the two side ditches 3 and the two side slopes 4, the distance between the main design line 1 and the secondary design line 2 is considered to be too far, and parallel design is not required (the maximum width required by the side ditches 3 and the side slopes 4 is calculated in the following process that the width of the side ditches 3 can determine the accurate width according to the pile number position, the side slopes 4 can determine the side slope form according to the pile number position, and the maximum height of the unknown side slope can be set to be 20 meters due to the fact that the side slope form has the first-level unknown side slope height.
In step (c), if the intersection point P is not the valid intersection point, a new straight line L2 and L1 are continuously formed to calculate the intersection point within the range of moving the X pile number back and forth by 20 meters on the secondary design line 2.
In the step (sixthly); and calculating the offset lines of the edges of the road width 5 on one side adjacent to the main design line 1 and the secondary design line 2, wherein if two or more intersection points exist in the two offset lines, the number of the cross section pile points in the intersection point range is closer, and parallel design is not needed.
The above-mentioned parts not described in detail are prior art.
Claims (6)
1. A method for designing a parallel cross section of a road is characterized by comprising the following steps: it comprises the following steps;
firstly, selecting a main design line (1) and a secondary design line (2) which need to be designed in parallel;
secondly, setting sections of the main design line (1) and the secondary design line (2) which need to be parallel;
calculating according to the line position relation of the main design line (1) and the secondary design line (2), carrying out segmentation processing on the main design line (1), and obtaining each subsection main line (1.1) and a corresponding subsection sub-line (2.1);
fourthly, sequentially designing the subsection main falling line (1.1) and the corresponding subsection sub falling line (2.1) in the third step one by one in parallel;
acquiring a side ditch (3) and a side slope (4) assembly at one side of the subsection falling main line (1.1) close to the subsection falling secondary line (2.1); calculating the pile number on the corresponding subsection sublevel (2.1) through the existing pile point number on the center of the section of the subsection sublevel (1.1), and simultaneously acquiring a side ditch (3) and a side slope (4) assembly on one side of the subsection sublevel (2.1) close to the subsection sublevel (1.1);
sixthly, calculating the intersection point by utilizing the pile point numbers of the subsection falling main line (1.1) and the subsection falling secondary line (2.1) at the offset line of the section in the fifth step, judging whether the parallel connection is performed or not according to the intersection point and obtaining the parallel connection method;
calculating bias lines at the edges of the road width (5) at one side adjacent to the main design line (1) and the secondary design line (2), and if one intersection point exists between the two bias lines, performing parallel design;
b, respectively calculating bias lines of the top and bottom of the side slope (4) on one side adjacent to the main design line (1) and the secondary design line (2), and solving whether two bias lines have intersection points or not, wherein if two or more intersection points exist, the number of cross-section pile points in the intersection point range is relatively short, and parallel design is needed;
c, if the slope is brushed according to filling or excavation, when the distance between the edges of the adjacent sides of the main design line (1) and the secondary design line (2) is smaller than the minimum width required by at least one side ditch (3) and two side slopes (4) in the design, automatically changing the design method into brushing the slope from high to low;
seventhly, calculating intersection, and projecting road width components (5), side ditches (3) and side slopes (4) corresponding to one side of the pile number A in the main design line (1) onto a plane to form a straight line L1 vertical to the main design line (1), and projecting road width components (5), side ditches (3) and side slopes (4) corresponding to the pile number X obtained in the secondary design line (2) onto the plane to form a straight line L2 vertical to the secondary design line (2); an intersection point X formed by the L1 and the L2 is an effective intersection point P if the X is in the roadbed edge range of the main design line (1) and the secondary design line (2), and an accurate parallel pile number on the secondary design line can be calculated according to the intersection point P;
eighthly, respectively calculating pile numbers A and C on the corresponding main design line (1) and the corresponding secondary design line (2) according to the intersection point P in the step seventhly, and respectively installing road width components (5), side ditches (3) and side slopes (4) according to the pile numbers to finish a group of parallel designs;
ninthly, obtaining a regular boundary line (6) according to the intersection points P1 and P2 … … Pn in the step (c).
2. A method of road side-by-side cross-sectional design according to claim 1, wherein: in the step (sixthly); the concrete mode of excavation and slope brushing is as follows: and excavating side ditches (3) are respectively arranged on the adjacent sides of the main design line (1) and the secondary design line (2), then brushing is respectively carried out according to the excavating side slopes (4), and a line, namely a boundary line (6) is formed in the middle of the side slopes (4) on the two sides.
3. A method of road side-by-side cross-sectional design according to claim 1, wherein: in the step (sixthly); the concrete mode of filling and slope brushing is as follows: brushing slopes on the edges of the roadbed (7) on the adjacent sides of the main design line (1) and the secondary design line (2) according to the filling slope (4), intersecting the middles to form a line, namely a boundary line (6), and installing the side ditch (3) on the boundary line (6).
4. A method of road side-by-side cross-sectional design according to claim 1, wherein: the concrete mode of high-direction and low-direction slope brushing is as follows: when the main design line (1) and the secondary design line (2) have a high side and a low side; and a side ditch (3) is arranged at the edge of the roadbed (7) at the lower side, and a side slope (4) is formed by brushing the slope from the high side to the low side.
5. A method of road side-by-side cross-sectional design according to claim 1, wherein: in the step (c), if the intersection point P is not the valid intersection point, continuing to form a new straight line L2 and L1 to calculate the intersection point within the range of moving the X pile number back and forth by 20 meters on the secondary design line (2).
6. A method of road side-by-side cross-sectional design according to claim 1, wherein: in the step (sixthly); and calculating the offset lines of the edges of the roadways (5) on one side adjacent to the main design line (1) and the secondary design line (2), wherein if two or more intersection points exist in the two offset lines, the number of the cross section pile points in the intersection point range is closer, and parallel design is not needed.
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| CN111859513B (en) * | 2020-07-30 | 2022-05-03 | 中铁二院工程集团有限责任公司 | Automatic calculation and rapid drawing method for roadbed gutter |
| CN117521206A (en) * | 2023-11-08 | 2024-02-06 | 四川省交通勘察设计研究院有限公司 | Roadbed three-dimensional BIM model slope intersection cutting method and system |
| CN118520626B (en) * | 2024-07-25 | 2024-09-24 | 山东省交通规划设计院集团有限公司 | Main line roadbed width calculation method at ramp junction |
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