Dynamic design method for traffic organization in construction period

Abstract

The invention discloses a dynamic design method for a traffic organization in a construction period. The method comprises the following steps of: obtaining a group-crossing object, a group-crossing object type, a group-crossing object communication-keeping section scheme, starting and ending point stake numbers, plan starting time and plan ending time; setting an initial plan construction period of the construction content of the group object; adjusting the initial planned construction period of the group delivery object to obtain a planned construction period; calculating a calculation period of the group delivery object; calculating a construction strength reference value of each intersection object; calculating the number and the total conversion time of the group object conversion sections; and drawing a crosspiece chart based on each intersection object. According to the method, intersection object data preparation, construction period library establishment and construction period adjustment are carried out in sequence, a multi-dimensional evaluation index after construction period adjustment is obtained through construction period calculation and processing and conversion section calculation, a visual and accurate feedback result is provided by using a construction strength reference value, a crosspiece chart and other expression forms, dynamic designers are assisted to iterate a construction period adjustment scheme, and the construction period adjustment efficiency is improved. The construction arrangement is optimized, and the construction efficiency is improved.

Description

Technical Field

[0001] The invention relates to the field of highway reconstruction and expansion, and in particular to a dynamic design method for traffic organization during construction period. Background Art

[0002] With the increase in the number of highly urbanized renovation and expansion projects, it is necessary to accelerate the digital transformation of traditional design methods and seize the commanding heights of engineering digitalization. Several problems that need to be solved urgently have also emerged. First, there is a large amount of urban traffic distributed around the highways in highly urbanized areas, and the transportation along the route is highly dependent on it. Special attention needs to be paid to the management and optimization of traffic flow; second, the urbanization around the project road has brought complex and diverse influencing factors, including increased population density, an increase in vehicles, and rising infrastructure demand. Therefore, the design of the maintenance plan needs to be comprehensively considered to ensure the rationality, feasibility and sustainability of the design; finally, the civil engineering design, construction and service level of the old road are directly related to the traffic organization plan. In the design process, it is necessary not only to meet the maintenance requirements and ensure smooth traffic during construction, but also to solve the problems of dense design nodes and structural demolition, while coordinating the civil engineering design, construction and operation and maintenance of the old road, and finally form a comprehensive, flexible and mature solution to adapt to the ever-changing urban traffic needs. Summary of the invention

[0003] The purpose of the present invention is to provide a method for dynamic design of traffic organization during construction period in view of the above problems existing in the prior art.

[0004] The above-mentioned purpose of the present invention is achieved by the following technical means:

[0005] A dynamic design method for traffic organization during construction period includes the following steps:

[0006] Step S1: Obtain the intersection object, the intersection object type, the intersection object maintenance section plan, the start and end pile numbers, the planned start time and the planned end time;

[0007] Step S2: setting the initial planned duration of the construction content of the handover object;

[0008] Step S3: Adjust the initial planned duration of the handover object to obtain the planned duration T 调整 ;

[0009] Step S4: Calculate the calculation period T of the intersection object 计算 ;

[0010] Step S5: Calculate the construction strength reference value P of each intersection group object;

[0011] Step S6: Calculate the number of transition segments and total transition time of the intersection object

[0012] Step S7: Draw a bar chart based on each intersection group object.

[0013] As mentioned above, the intersection objects include the main line, ramps and temporary access roads, and one intersection object has only one open section.

[0014] The initial planned duration in step S2 as described above is set based on the following steps:

[0015] Step S2.1: The construction content of the handover object is the process analysis of roadbed and pavement construction;

[0016] Step S2.2: The construction content of the handover object is the process analysis of bridge construction;

[0017] Step S2.3: Based on the analysis of the roadbed and pavement construction process and the bridge construction process, the recommended man-day values ​​of the unit engineering quantity of each construction content are summarized to obtain the initial planned construction period of the handover object.

[0018] As mentioned above, the construction period T is calculated in step S4. 计算 Calculated based on the following formula:

[0019] T 计算 =N*t

[0020] Where: T 计算 To calculate the construction period, the unit is man-day, N is the engineering quantity of the handover object, and t is the recommended value of man-day per unit engineering quantity.

[0021] The engineering quantities of the objects of the above-mentioned handover group include:

[0022] The construction content of the handover object is the engineering quantity of the excavation project:

[0023]

[0024] Where: V 挖方 is the engineering volume of the excavation project, Si is the excavation area in the cross section of the current calculation pile number i, Si+1 is the excavation area in the cross section of the next calculation pile number i+1, and L is the distance between two adjacent calculation pile numbers;

[0025] The construction content of the handover object is the engineering quantity of the filling project:

[0026]

[0027] Where: V 填方 is the engineering volume of the filling project, Ti is the filling area in the cross section of the current calculation pile number i, Si+1 is the filling area in the cross section of the next calculation pile number i+1, and L is the distance between two adjacent calculation pile numbers.

[0028] The engineering quantities of the above-mentioned handover objects also include:

[0029] The amount of grass planting protection engineering and masonry protection engineering:

[0030] First, according to the height difference between the cross-section edge design elevation H1 and the ground line elevation H2, determine whether the roadbed should be protected by grass planting or masonry protection;

[0031] Then, the height difference ΔH=H1-H2 is calculated. When ΔH<0, it is judged as an excavation project; when ΔH≥0, it is judged as a filling project.

[0032] When ΔH ≥ 0, it is judged as a fill protection form. Furthermore, if the absolute value |ΔH| ≥ 5m, masonry protection engineering is adopted. If the absolute value |ΔH|<5m, grass planting protection project is adopted.

[0033] When ΔH < 0, it is judged as excavation protection. Furthermore, if the absolute value |ΔH|≥4m, masonry protection engineering is adopted. If the absolute value |ΔH| is less than 4m, grass planting protection engineering should be adopted.

[0034] According to the cross-sectional slope length of the current pile number, the cross-sectional slope length of the next pile number, and the distance from the current pile number to the next pile number, the section area value between the current pile number and the next pile number is calculated. The area values ​​of all sections between the first and last pile numbers of the grass planting protection project are used as the engineering quantity of the grass planting protection project, and the area values ​​of all sections between the first and last pile numbers of the masonry protection project are used as the engineering quantity of the masonry protection project.

[0035] The engineering quantities of the above-mentioned handover objects also include:

[0036] The engineering quantity of the structural layer of the pavement engineering:

[0037] S 路面 =W*L

[0038] V 路面 =S 路面 *d

[0039] Where: S 路面 is the structural layer area of ​​the pavement engineering, V 路面 is the engineering quantity of the structural layer of the pavement engineering, W is the average width of the structural layer of the pavement engineering under construction, L is the length of the structural layer of the pavement engineering under construction, and d is the thickness of the structural layer of the pavement under construction;

[0040] The amount of work for the bridge part is to use the old bridge to build a new one and to demolish the old bridge to build a new one:

[0041] S 桥梁 =W 桥梁 *L 桥梁

[0042] V 桥梁 =S 桥梁 *d 桥梁

[0043] Where: S 桥梁 is the bridge area, W 桥梁 is the average width of the bridge under construction, L 桥梁 is the average length of the bridge under construction, V 桥梁 The amount of engineering work for the bridge part is the use of old bridges to build new ones and the demolition of old bridges to build new ones. 桥梁 is the thickness of the bridge under construction.

[0044] As described above, calculating the number of transition segments and the total transition time of the intersection group objects includes the following steps:

[0045] The list of intersection objects is T = {T1, T2, ..., T n}, where Tzi represents the zi-th intersection object, and zi is the intersection object sequence number;

[0046] Traverse the obtained intersection group object list and take out adjacent intersection group object pairs in turn (Tz i ,Tz i+1 ), where 1≤zi<n, n is the total number of intersection objects;

[0047] For each pair of adjacent intersection objects (Tz i ,Tz i+1 ), calculate the time difference Δt of its construction completion (zi) ;

[0048] The time difference Δt obtained each time (zi) Add to the time difference list ΔT, time difference Δt (zi) =0, no addition;

[0049] The number of elements in the time difference list ΔT is counted, which is the number of transition segments of the intersection group objects;

[0050] All time differences in the time difference list ΔT are summed to obtain the total conversion time S.

[0051] Drawing a bar chart as described above includes the following steps:

[0052] Create an empty bar chart with the horizontal axis as the time axis and the vertical axis as the intersection group object, and get each intersection group object P zi The earliest start time is taken as the project start time, and each intersection object P is obtained. ziThe latest end time of the project is used as the end time of the project:

[0053] Sort the objects in the intersection group by pile number order and plot them on the vertical axis of the bar chart;

[0054] Determine the time span of the Gantt chart, from the earliest project start time to the latest project end time;

[0055] Use different colors to mark the corresponding positions of the construction phases of each intersection group object on the timeline;

[0056] Use different colors to mark the corresponding positions of the start and end time points of the conversion segment of each intersection object on the timeline.

[0057] Compared with the prior art, the present invention has the following beneficial effects:

[0058] The existing dynamic design method of traffic organization plan during construction period lacks scientific and effective standardized process. In comparison, the technical advantages of the present invention are obvious. The present invention is carried out on the basis of the data of digital traffic organization design plan. Focusing on the dynamic design demand of traffic organization plan facing the change of construction period plan, the data preparation of traffic organization object, establishment of construction period library and construction period adjustment are carried out in sequence. The multi-dimensional evaluation index after construction period adjustment is obtained through construction period calculation and processing, conversion section calculation, and the expression form of construction intensity reference value and bar chart is used to provide intuitive and accurate feedback results, assist dynamic designers to iterate construction period adjustment plan, optimize construction arrangement and improve construction efficiency. The application of the method of the present invention can not only improve the scientificity and convenience of dynamic design of traffic organization plan during construction period, but also provide a basis for dynamic control during construction period and even operation period. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] Figure 1 It is a flow chart of the present invention. DETAILED DESCRIPTION

[0060] In order to facilitate those skilled in the art to understand and use the present invention, the present invention is further described in detail below in conjunction with embodiments. It should be understood that the implementation examples described herein are only used to illustrate and explain the present invention and are not used to limit the present invention.

[0061] A dynamic design method for traffic organization during construction period includes the following steps:

[0062] Step S1: Obtain the intersection object, the intersection object type, the intersection object maintenance section plan, the starting and ending pile numbers, the planned start time and the planned end time, specifically:

[0063] The full name of the intersection object is the traffic organization digital design object, which includes the main line, ramp and temporary access road. An intersection object has only one traffic-maintaining section.

[0064] The types of intersection objects include general objects and key construction point objects. General objects mainly include general roadbeds and general bridges; key construction points mainly include interchanges, overpasses, transition sections and structures, etc.

[0065] The starting pile number and the ending pile number are the data for locating the intersection object.

[0066] Step S2: setting the initial planned construction period of the construction content of the handover group object and establishing a construction period library for the handover group object;

[0067] Step S2.1: The construction content of the handover object is the process analysis of roadbed and pavement construction: the construction content of roadbed and pavement includes earthwork engineering, protection and drainage engineering and pavement engineering, among which, earthwork engineering includes filling engineering and excavation engineering, protection and drainage includes grass planting protection engineering and masonry protection engineering, and pavement engineering includes base and below engineering, lower layer engineering, middle surface layer engineering and upper layer engineering.

[0068] Step S2.2: The construction content of the handover object is the process analysis of bridge construction: According to the structural status of the existing bridge, the construction methods of the bridge are divided into two types: utilization of the old bridge and new construction after the old bridge is demolished. The overall construction content of the old bridge utilization includes lower structure construction, upper structure prefabrication, upper structure construction, bridge deck paving, reinforcement and reconstruction of the old bridge, etc.; the overall construction content of the new construction after the old bridge is demolished includes lower structure construction, upper structure prefabrication, old bridge demolition, bridge deck paving, etc.

[0069] Step S2.3: Setting the initial planned construction period of the handover group object: Based on the analysis of the roadbed and pavement construction process and the bridge construction process, refer to the "Highway Engineering Estimation Index" (JTG / T3821-2018) for the earthwork engineering (filling engineering and excavation engineering), protection and drainage engineering (grass planting protection engineering and masonry protection engineering) and pavement engineering (base and below engineering, lower layer engineering, middle surface layer engineering and upper layer engineering) of the roadbed part and the old bridge part. New construction (lower structure construction, upper structure prefabrication, upper structure construction, bridge deck paving, reinforcement and reconstruction of old bridges) and new construction after demolition of old bridges (lower structure construction, upper structure prefabrication, old bridge demolition, bridge deck paving) are summarized to obtain the initial planned construction period of the handover group object, and the construction period library of the handover group object is constructed according to the initial planned construction period of the handover group object.

[0070] Step S3: Adjust the initial planned duration of the handover object to obtain the planned duration T 调整 , including:

[0071] The construction period is adjusted according to the construction stage with the intersection group object as the target unit. According to the actual situation on site during the construction period, the planned construction period of each intersection group object is adjusted. You can select multiple intersection group objects to batch set the corresponding planned construction period, or set the planned construction period of each intersection group object individually, including setting the planned start time and planned end time, so as to obtain the planned construction period T of each intersection group object dynamically designed and adjusted. 调整 .

[0072] Step S4: Calculation period T of the intersection object 计算 Calculation of

[0073] (1) The calculated duration of the handover object is directly obtained by multiplying the project scale by the duration library, that is:

[0074] T 计算 =N*t

[0075] Where: T 计算 To calculate the construction period, the unit is man-day, N is the amount of work to be done, and t is the "recommended value of man-day per unit amount of work" obtained in the previous step S2.

[0076] (2) According to the purpose and accuracy requirements of the construction period calculation, the engineering quantity N of the construction content of the above-mentioned handover objects is calculated. The specific method is as follows:

[0077] ① The calculation formula for the engineering quantity of excavation engineering is:

[0078]

[0079] Where: V 挖方 is the engineering volume of the excavation project, Si is the area of ​​the excavation in the cross section of the current calculation pile number i, Si+1 is the area of ​​the excavation in the cross section of the next calculation pile number i+1, and L is the distance between two adjacent calculation pile numbers.

[0080] ②The calculation formula for the engineering quantity of the filling project is:

[0081]

[0082] Where: V 填方 is the engineering volume of the filling project, Ti is the filling area in the cross section of the current calculation pile number i, Si+1 is the filling area in the cross section of the next calculation pile number i+1, and L is the distance between two adjacent calculation pile numbers.

[0083] ③ Calculation of the engineering quantity of grass planting protection engineering and masonry protection engineering:

[0084] First, according to the height difference between the design elevation H1 of the cross section edge and the ground line elevation H2, determine whether the roadbed should be protected by grass planting or masonry protection:

[0085] H1 is the design elevation of the cross-section edge, which can be directly obtained through the design file, or calculated through the design elevation and cross slope value near the design center line; H2 is the ground line elevation at the intersection of the slopes, and the ground elevation data of the corresponding cross section can be obtained through the offset.

[0086] Then, determine the filling and excavation, the height difference ΔH=H1-H2, when ΔH<0, it is determined to be an excavation project; when ΔH≥0, it is determined to be a filling project.

[0087] Furthermore, when ΔH ≥ 0, it is judged as a fill protection form, and the 5m height difference is used as the boundary to distinguish between masonry protection and grass planting protection. If the absolute value | ΔH | ≥ 5m, the masonry protection project is adopted, using a roadbed protection structure made of bricks and stone masonry. If the absolute value |ΔH|<5m, grass planting protection engineering is adopted, and plants are planted or sown on the land surface.

[0088] It can be seen from the above formula that the slope rate of the fill slope has been simplified. The slope rate of the fill slope is generally 1:1.5 for the first level, 1:1.75 for the second level, and 1:2 for the third level. For the masonry protection slope, it is generally considered not to exceed level 2, and the average value is 1:1.6.

[0089] Furthermore, when ΔH < 0, it is judged as excavation protection, and the 4m height difference is used as the boundary to distinguish between masonry protection and grass planting protection. If the absolute value | ΔH | ≥ 4m, the masonry protection project is adopted. If the absolute value |ΔH| is less than 4m, grass planting protection engineering should be adopted.

[0090] It can be seen from the above formula that the slope rate of the excavation slope has been simplified. According to project experience, the higher excavation slopes are generally 1:1 for the first level, 1:1.25 for the second level, and 1:1.5 for the third level. For the masonry protection slope, it is generally considered not to exceed level 2, and the average value is 1:1.13. When the excavation slope is level 1, a gentler slope rate is often used to improve the stability of the slope while meeting the protection requirements of grass planting, so 1:1.25 is taken as the representative value.

[0091] According to the cross-sectional slope length of the current pile number, the cross-sectional slope length of the next pile number, and the distance from the current pile number to the next pile number, the section area value between the current pile number and the next pile number is calculated. The area values ​​of all sections between the first and last pile numbers of the grass planting protection project are used as the engineering quantity of the grass planting protection project, and the area values ​​of all sections between the first and last pile numbers of the masonry protection project are used as the engineering quantity of the masonry protection project.

[0092] ④ The engineering quantity calculation formula of the structural layer of the pavement engineering is unified. The structural layer of the pavement engineering includes the base layer and the following engineering, the lower layer engineering, the middle surface layer engineering and the upper layer engineering:

[0093] S 路面 =W 路面 *L 路面

[0094] V 路面 =S 路面 *d 路面

[0095] Where: S 路面 is the structural layer area of ​​the pavement engineering, V 路面 is the engineering quantity of the structural layer of the pavement engineering, W 路面 is the average width of the structural layer of the pavement construction project, L 路面 is the length of the structural layer of the pavement construction project, d 路面 It is the thickness of the construction pavement structure layer.

[0096] ⑤ Calculation of the engineering quantity of the bridge part: the new construction of the old bridge and the new construction after the demolition of the old bridge:

[0097] S 桥梁 =W 桥梁 *L 桥梁

[0098] V 桥梁 =S 桥梁 *d 桥梁

[0099] Where: S 桥梁 is the bridge area, W 桥梁 is the average width of the bridge under construction, L 桥梁 is the average length of the bridge under construction, V 桥梁 The amount of engineering work for the bridge part is the use of old bridges to build new ones and the demolition of old bridges to build new ones. 桥梁 is the thickness of the bridge under construction.

[0100] Step S5: Calculation of the construction strength reference value P of each intersection group object;

[0101] The construction strength reference value P of each intersection group object is calculated based on the following formula:

[0102] P=T 调整 / T 计算

[0103] Step S6: Calculate the number of conversion segments and the total conversion time of the intersection object, specifically including:

[0104] (1) Obtain a series of intersection objects from the data source and organize them into a list. This list of intersection objects is denoted as T = {T1, T2, ..., T n}, where Tzi represents the zi-th intersection object, and zi is the intersection object sequence number;

[0105] (2) Traverse the obtained intersection object list and take out adjacent intersection object pairs in turn (Tz i ,Tz i+1 ), where 1≤zi<n, n is the total number of intersection objects;

[0106] (3) For each pair of adjacent intersection objects (Tz i ,Tz i+1 ), calculate the time difference of its construction completion, recorded as Δt (zi) The time difference is calculated as: Δt (zi) =|t zi+1 -t zi ∣, where t zi and t zi+1 Respectively represent the intersection object T zi and T zi+1 Calculation period of construction;

[0107] (4) The time difference Δt obtained each time (zi) Add to the time difference list ΔT, ΔT = {Δt (1) ,Δ t(2) ,...,Δt (n-1)}, time difference Δt (zi) =0, no addition;

[0108] (5) Count the number of elements in the time difference list ΔT, which is the number of transition segments of the intersection object. The number of transition segments is N, and the calculation formula is: N = len(ΔT), and the output is the number of transition segments N;

[0109] (6) Sum all the time differences in the time difference list ΔT to obtain the total conversion time. The total conversion time is denoted as S, and its calculation formula is: The total conversion time S is output as one of the output evaluation data.

[0110] Step S7: Draw a bar chart based on each intersection group object. Specifically, it includes:

[0111] (1) Create an empty bar chart with the horizontal axis as the time axis and the vertical axis as the intersection object, and obtain each intersection object P zi The earliest start time is taken as the project start time, and each intersection object P is obtained. zi The latest end time of the project is used as the end time of the project:

[0112]

[0113] Project start time←min({T start (P zi )})

[0114] Project end time ← max({T end (P zi )})

[0115] Among them, P zi Represents each intersection object, T start (P zi ) and T end (P zi ) represent the intersection objects P zi The start time and end time of the

[0116] (2) Sort the objects in the intersection group by pile number and plot them on the vertical axis of the bar chart:

[0117] {P1,P2,...,P n}←Sort({P zi},by S i )

[0118] Among them, S i Represents the zi-th intersection object P zi The i-th pile number, Sort is the sorting function.

[0119] (3) Determine the time span of the Gantt chart, from the earliest project start time to the latest project end time:

[0120] Time span←[project start time, project end time]

[0121] (4) Use different colors to mark the corresponding positions of the construction phases of each intersection group object on the timeline:

[0122] P zi ∈{P1,P2,...,P n}

[0123] Bar chart [P zi ,T start (P zi ):T end (P zi )]←Color zi

[0124] Among them, T start (P zi ) and T end (P zi ) represent the intersection objects P ziThe start and end time of each stage, Color zi Represents the intersection object P zi The colors of the stages on the bar graph.

[0125] (5) Use different colors to mark the corresponding positions of the start and end time points of the conversion segments of each intersection object on the time axis:

[0126] P zi ∈{P1,P2,...,P n}

[0127] Bar chart [P zi ,T trans_start (P zi )]←Color trans_start

[0128] Bar chart [P zi ,T trans_end (P zi )]←Color trans_end

[0129] Among them, T trans_start (P zi ) and T trans_end (P zi ) represent the intersection objects P zi The start and end time points of the conversion segment, Color trans_start and Color trans_end The color indicating the start and end time points of the transition segment.

[0130] In step S1, the present invention fully considers the basic data required in the dynamic design process of the traffic organization plan during the construction period, analyzes the generality and particularity in the maintenance design, introduces the concept of intersection objects, divides the entire highway into general objects and key work point objects, and describes the horizontal and vertical characteristics of each intersection object based on the maintenance section and the starting and ending pile numbers, clarifies the dynamic design content of the traffic organization plan, and lays a foundation for digital dynamic design; in step S2, the construction process content of each intersection object is analyzed, and the intersection objects are divided into two types: roadbed and pavement, and bridges, and objects of different types are divided into multiple areas, and a construction period library is established based on highway engineering estimation indicators to provide standardized construction period data; in step S3, it is allowed to adjust the planned construction period in batches or individually according to the actual construction situation, to ensure the flexibility and operability of the maintenance plan, and to help cope with changes that may occur during the construction process; in step S4, the construction period is adjusted according to the actual situation of the construction, so as to ensure the flexibility and operability of the maintenance plan, and to help cope with changes that may occur during the construction process; in step S5, the construction period is adjusted according to the actual situation of the construction, so as to ensure the flexibility and operability of the maintenance plan, and to help cope with changes that may occur during the construction process. In step S4, the calculated construction period of the intersection objects is introduced to cover various construction contents of the intersection objects, including excavation, filling, protective engineering, pavement structure layer and bridge engineering, ensuring the accuracy and reliability of the construction period calculation of each intersection object; in step S5, the construction intensity reference value is calculated to ensure that the construction intensity matches the planned construction period, balance the construction intensity, and provide a reference basis for the dynamic design construction period adjustment; in step S6, the number of transition sections and the total transition section time after the construction period adjustment are calculated and counted, and through reasonable arrangement of transition sections, the construction period delay caused by improper transition sections is reduced, the dynamic design process of the construction period is optimized, and the overall construction efficiency is improved; in step S7, a visual management tool is provided, and the planned construction period and actual construction period are intuitively displayed through a bar chart, and the construction stages and transition sections of each intersection object are marked with different colors, which clearly shows the project progress and the time distribution of each stage, making it convenient for project managers to monitor and adjust.

[0131] It should be noted that the embodiments described in the present invention are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the described embodiments or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the attached claims.

Claims

1. A dynamic design method for traffic organization during construction period, characterized in that: The following steps are involved: Step S1: Obtain the intersection object, the intersection object type, the intersection object maintenance section plan, the start and end pile numbers, the planned start time and the planned end time; Step S2: setting the initial planned duration of the construction content of the handover object; Step S3: Adjust the initial planned duration of the handover object to obtain the planned duration T 调整 ; Step S4: Calculate the calculation period T of the intersection object 计算 ; Step S5: Calculate the construction strength reference value P of each intersection group object; Step S6: Calculate the number of transition segments and total transition time of the intersection object Step S7: Draw a bar chart based on each intersection group object.

2. According to claim 1, a dynamic design method for traffic organization during construction period is characterized in that: The intersection group objects include the main line, ramps and temporary access roads, and one intersection group object has only one open section.

3. According to claim 1, a dynamic design method for traffic organization during construction period is characterized in that: The initial planned duration in step S2 is set based on the following steps: Step S2.1: The construction content of the handover object is the process analysis of roadbed and pavement construction; Step S2.2: The construction content of the handover object is the process analysis of bridge construction; Step S2.3: Based on the analysis of the roadbed and pavement construction process and the bridge construction process, the recommended man-day values ​​of the unit engineering quantity of each construction content are summarized to obtain the initial planned construction period of the handover object.

4. According to claim 1, a dynamic design method for traffic organization during construction period is characterized in that: In step S4, the construction period T is calculated 计算 Calculated based on the following formula: T 计算 =N*t Where: T 计算 To calculate the construction period, the unit is man-day, N is the engineering quantity of the handover object, and t is the recommended value of man-day per unit engineering quantity.

5. According to claim 4, a dynamic design method for traffic organization during construction period is characterized in that: The engineering quantities of the handover objects include: The construction content of the handover object is the engineering quantity of the excavation project: Where: V 挖方 is the engineering volume of the excavation project, Si is the excavation area in the cross section of the current calculation pile number i, Si+1 is the excavation area in the cross section of the next calculation pile number i+1, and L is the distance between two adjacent calculation pile numbers; The construction content of the handover object is the engineering quantity of the filling project: Where: V 填方 is the engineering volume of the filling project, Ti is the filling area in the cross section of the current calculation pile number i, Si+1 is the filling area in the cross section of the next calculation pile number i+1, and L is the distance between two adjacent calculation pile numbers.

6. According to claim 4, a dynamic design method for traffic organization during construction period is characterized in that: The engineering quantity of the handover object also includes: The amount of grass planting protection engineering and masonry protection engineering: First, according to the height difference between the cross-section edge design elevation H1 and the ground line elevation H2, determine whether the roadbed should be protected by grass planting or masonry protection; Then, the height difference ΔH=H1-H2 is calculated. When ΔH<0, it is judged as an excavation project; when ΔH≥0, it is judged as a filling project. When ΔH ≥ 0, it is judged as a fill protection form. Furthermore, if the absolute value |ΔH| ≥ 5m, masonry protection engineering is adopted. If the absolute value |ΔH|<5m, grass planting protection project is adopted. When ΔH < 0, it is judged as excavation protection. Furthermore, if the absolute value |ΔH| ≥ 4m, masonry protection engineering is adopted. If the absolute value |ΔH| is less than 4m, grass planting protection engineering should be adopted. According to the cross-sectional slope length of the current pile number, the cross-sectional slope length of the next pile number, and the distance from the current pile number to the next pile number, the section area value between the current pile number and the next pile number is calculated. The area values ​​of all sections between the first and last pile numbers of the grass planting protection project are used as the engineering quantity of the grass planting protection project, and the area values ​​of all sections between the first and last pile numbers of the masonry protection project are used as the engineering quantity of the masonry protection project.

7. A method for dynamic design of traffic organization during construction period according to claim 4, characterized in that: The engineering quantity of the handover object also includes: The engineering quantity of the structural layer of the pavement engineering: S 路面 =W*L V 路面 =S 路面 *d Where: S 路面 is the structural layer area of ​​the pavement engineering, V 路面 is the engineering quantity of the structural layer of the pavement engineering, W is the average width of the structural layer of the pavement engineering under construction, L is the length of the structural layer of the pavement engineering under construction, and d is the thickness of the structural layer of the pavement under construction; The amount of work for the bridge part is to use the old bridge to build a new one and to demolish the old bridge to build a new one: S 桥梁 =W 桥梁 *L 桥梁 V 桥梁 =S 桥梁 *d 桥梁 Where: S 桥梁 is the bridge area, W 桥梁 is the average width of the bridge under construction, L 桥梁 is the average length of the bridge under construction, V 桥梁 The amount of engineering work for the bridge part is the use of old bridges to build new ones and the demolition of old bridges to build new ones. 桥梁 is the thickness of the bridge under construction.

8. According to claim 4, a method for dynamic design of traffic organization during construction period is characterized in that: The calculation of the number of conversion segments and the total conversion time of the intersection group objects comprises the following steps: The list of intersection objects is T = {T1, T2, ..., T n }, where Tzi represents the zi-th intersection object, and zi is the intersection object sequence number; Traverse the obtained intersection group object list and take out adjacent intersection group object pairs in turn (Tz i ,Tz i+1 ), where 1≤zi<n, n is the total number of intersection objects; For each pair of adjacent intersection objects (Tz i ,Tz i+1 ), calculate the time difference Δt for completion of construction (zi) ; The time difference Δt obtained each time (zi) Add to the time difference list ΔT, time difference Δt (zi) =0, no addition; The number of elements in the time difference list ΔT is counted, which is the number of transition segments of the intersection group objects; All time differences in the time difference list ΔT are summed to obtain the total conversion time S.

9. A method for dynamic design of traffic organization during construction period according to claim 4, characterized in that: The drawing of the bar graph comprises the following steps: Create an empty bar chart with the horizontal axis as the time axis and the vertical axis as the intersection group object, and get each intersection group object P zi The earliest start time is taken as the project start time, and each intersection object P is obtained. zi The latest end time of the project is used as the end time of the project: Sort the objects in the intersection group by pile number order and plot them on the vertical axis of the bar chart; Determine the time span of the Gantt chart, from the earliest project start time to the latest project end time; Use different colors to mark the corresponding positions of the construction phases of each intersection group object on the timeline; Use different colors to mark the corresponding positions of the start and end time points of the conversion segment of each intersection object on the timeline.

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