合肥市高新区某区域交通改善研究.pdf

第6 期（总第2 9 0 期）2023年6 月城市道桥与防洪URBANROADSBRIDGES&FLOODCONTROL道路交通D01:10.16799/ki.csdqyfh.2023.06.007合肥市高新区某区域交通改善研究任伟强（合肥市规划设计研究院，安徽合肥2 3 0 0 4 1）摘要：以合肥市高新区某区域交通拥堵改善研究着手，通过分析现状道路交通拥堵原因，提出深挖现有路网潜力、加强路面停车管理、优化交通组织结构以及对现状道路进行局部改造等一系列建议，力争在较少的工程投资下最大限度地释放道路通行能力。所提建议对城市道路交通改善研究和改造具有一定借鉴意义。关键词：城市道路；交通拥堵；通行能力；停车位中图分类号：U491.2文献标志码：B文章编号：1 0 0 9-7 7 1 6(2 0 2 3)0 6-0 0 2 3-0 30引言长江西路随着机动车保有量的持续快速增长，城市交通设施的供给与交通需求之间的矛盾日益突出，由此导致“行车难”和“停车难”问题越来越严重，已经成为困扰市民出行的痛点。产生交通拥堵的根本原因是交通需求超过交通供给水平，拥堵治理的基本思路也是调控供需，以达到动态平衡。交通拥堵从具体原因及展现形态上又可分为功能性拥堵、通道性拥堵和节点型拥堵。其中功能性拥堵起因是城市功能过于集中，外围新城职住分布（就业和居住分离）差异化明显，导致刚性交通需求空间集聚，超出了交通基础设施的供给能力。通道性拥堵是受山体、河流和铁路等分割，在跨越自然障碍物的路段道路通行能力有限，交通集聚度高，形成瓶颈点。节点性拥堵指交通流在道路交叉口或者路段上形成的交通量过于集中，引发点状拥堵。1现有条件分析本文研究的合肥市安医一附院高新园区周边范围由长江西路、创新大道、皖水路、杨林路合围而成（见图1）。经现场踏勘分析，该区域交通拥堵现象具备以下3 个特征。(1)功能性问题。高新区是合肥市重要的高新技术企业聚集地，有大量就业岗位，但其内部高质量教育资源匮乏，优质大型商业稀缺，需要与老城区进行资源互补。由此导致老城区至高新区的车辆主要经收稿日期：2 0 2 2-0 9-1 6作者简介：任伟强（1 9 8 6 一），男，硕士，高级工程师，主要从事市政道桥设计工作。百草街安医附院皖水路创文永彩虹路新大路路林道望江西路图1 项目区位图由长江西路，长江西路东向与创新大道南向交互交通量大。(2)通道性问题。受大蜀山、董铺水库等自然障碍物的分隔，老城区与高新区联系通道少，通道通行能力受限。且因绕城高速影响，安医周边路网不完善，车辆几乎全部经由创新大道进出安医片区，由此引发了百草街及皖水路与创新大道交口的大流量（3）节点型问题。现状医院周边小区停车位供给不足，将大量停车需求赶至周边道路解决，引发了停车乱象，影响路面通行效率。2优化交通组织结构2.1通行能力计算2.1.1长江西路东进口左转通行能力老城区至高新区的交通主要经由长江西路，长江西路东向与创新大道南向交互交通量大。通过交通量调查，长江西路与创新大道交口早、晚高峰现状东进口左转机动车交通量分别达到2 4 0 5pcu/h和1 0 2 9 pcu/h，南进口右转机动车交通量分别为1 098 pcu/h和1 7 54 pcu/h(见图2)。根据信号周期计算长江西路东向南左转车道的通行能力，计算式为：23大蜀山森林公园城市道桥与防洪任伟强：合肥市高新区某区域交通改善研究2023年第6 期北路44855862917早高峰机动车交通量图2 长江西路-创新大道交叉口早/晚高峰小时车流量(单位:pcu/h)ta-to+1)C,=3600Tti式中：C为1 条直行车道通行能力，pcu/h；T 为信号灯周期，取2 0 0 s;tg为信号周期内绿灯时间，取4 0 s；to为绿灯亮后第1 辆车通过停止线的时间，可取2.3 s；ti为平均车头时距，小型车取2.5s，大型车取3.5s，长江西路小车占比约9 0%，可取2.6 s;为折减系数,可取0.9。代人各参数后，360040-2.3C.=+1)0.9=251 pcu/h。2002.6用Cel表示专左专右车道的进口道通行能力之和,其计算式为：Cal=(1-r-,)ZC,式中：ZC。为进口道直行总通行能力，为1 条直行车道通行能力C。与车道数的乘积;i、为左、右转车辆占进口道车辆比例，取0.7 4 2、0.0 8 8。代入各参数后，Cel=72512(1-0.742-0.088)左转专用车道通行能力C为：Ci=Celr 1所以 Ci=2 9530.742=2191 pcu/h2 405 pcu/h;饱和度=2 4 0 5/2 1 9 1=1.1 0。由此得到结论：长江西路现状东进口3 条左转车道不能满足现状交通需求（2 4 0 5pcu/h），饱和度已达1.1 0,会造成上游拥堵 2 。2.1.2创新大道方向通行能力创新大道方向，长江西路、百草街、皖水路交口间距为3 2 0 m，现状均为信号灯控平交口（见图3）。根据现状创新大道与长江西路、百草街、皖水路交口间距及信号周期，计算创新大道方向路段通行能力Nm为：北路286-5492 405263508-1757南路晚高峰机动车交通量=2 953 pcu/h。(3)2451754910295C南路一(1)(2)皖水路北百草街通行能力约2.839pcu/h长江西路右转1 车道左转3 车道-2405peu/h图3 创新大道方向现状图Nm=N,xa.xkmS式中：N.为单车道通行能力，6 0 km/h设计时速取1730pcu/h;为机动车道通行能力分类系数，主干道取0.8；km为车道折减系数，创新大道5车道取3.8；8 为交口通行能力折减系数，无信号灯快速路取1，与交口间距成正比，与绿信比成正比。创新大道沿线交口信号配时为6 0 s（绿）+3 5s（红）。以百草街计，8 值为0.54；以皖水路计，8 值为0.7。根据交通量调查，上游长江西路高峰小时左转与右转交通量合计约2 6 9 6 pcu/h。以当前百草街设红绿灯计算，创新大道路段通行能力Nm=17300.83.80.54=2839pcu/h;饱和度=2 6 9 6/2 8 3 9=0.9 5，服务水平四级。取消百草街信号灯，以皖水路设红绿灯计算时，创新大道路段通行能力Nm=17300.83.80.7=3680pcu/h；饱和度=2 6 9 6/3 6 8 0=0.7 3,服务水平三级。结论：百草街交口设红绿灯，饱和度0.9 5,服务水平为四级，易引发拥堵；取消百草街交口红绿灯，仅皖水路设红绿灯，能满足上游通行需求。2.2解决方案2.2.1长江西路东进口（1)现状为3 左+2 直+1 右，建议将1 条直行车道改造为可变车道，高峰期左转，平峰直行车道，使得高峰期车道分配为4 左+1 直+1 右，匹配交通需求。(2)打通长江西路北侧客运西站周边路网，优化微循环，减少长江西路东进口右转车辆，将右转车道调整为直右车道。（3）优化交口信号灯配时，在不增大信号周期的前提下，延长早高峰东进口左转相位时长。6203680pcu/h291 pcu/h通行能力约(4)2023年第6 期任伟强：合肥市高新区某区域交通改善研究城市道桥与防洪2个项目经研究具备可行性，已列入区内建设计划(见图5)。林路2.2.2创新大道方向(1)近期封闭百草街交口，取消转向功能，保留东西向地面过街，优化信号灯配时，提高创新大道通行能力。（2)远期根据需要设置立体过街，消除该节点信号等配时影响。3加强路面停车管理项目周边除安医附院外，还有华纺新华城、海亮九玺、皖水公寓等住宅小区（见图4）。长江西路华纺新华城1600户，51 2 0 人+安医圣联皖水时代场公寓文典路-十一彩虹路图4 安医周边项目分布根据现场走访调查，安医医院内有2 4 0 0 多个停车位，其中地面50 0 多个，地下1 9 0 0 个，目前尚有富余。华纺新华城、海亮九玺小区内有59 0 0 多个停车位，其中华纺新华城1 2 0 0 个；海亮九玺南、北区总计4 7 0 0多个车位，但地面近1 2 0 0 个车位已禁停（人车分离），仅地下3 6 0 0 个车位出租使用，已饱和，超量住户沿百草街停放。百草街沿路规划约3 50 个停车位，现场实际停车数量接近50 0 辆（存在违停、超停现象），其中“僵户车”及其他长期停放车辆仅3 0 余辆，占现状停车总数约6%。另外停车位直接出人百草街机动车道，对交通干扰较大。百草街多数车辆为附近居住、工作、经商人员停放，停车周期平均约1 2 d。周边小区配建的停车位已趋于饱和，沿线存在确切的停车需求，不宜取消停车位。对停车问题提出以下建议：(1)现状路面停车位改造为由后方辅道进出，避免路面停车干扰主道。（2）引人城泊管理系统，实施分时段收费制度。(3)增设抓拍设施，管理违章停车。（4)开发周边公共停车位，疏解停车难的问题，实施分时段收费制度，对周边住户夜间停车给予优惠。4深挖现有路网潜力 3 安医片区周边路网不完善，车辆仅能从创新大道方向进出，急需解决可分流路径。经与规划建设部门协商，按照“打通半截路，构建微循环”的治堵思路，通过现场踏勘，建议片区向北增设杨林路长江西路通道，向东增设彩虹路下穿绕城高速接枫林路通道，以疏解片区交通量。这海亮九玺2477户-7926人海亮九玺彩虹路二三N长江西路百草街-7T-路-彩虹路图5建议构建微循环路段位置5结语交通改善类项目需深入现场调研、对接需求，分析存在的问题与症结所在。在城市功能上提出建议，为规划与城市管理做好参谋；在通道上探寻可利用的路由，提前做好谋划，引导建设时序；在节点上挖掘现有道路的通行能力潜力，规范和分离各类交通流，通过节点的交通改善，以点带面，提高路网交通运行效率。从目前已实施的节点及路段经验看来，优化效果较为显著。后续杨林路北延、彩虹路东延等路网微循环打通，创新大道方向慢行干扰分离后，该项目周边交通拥堵问题将会有进一步的改善。参考文献：1直道而行之.城市道路交通拥堵治理对策指引 DB/OL(2021-11-10).https:/ S3刘一鸣.改善城市道路交通微循环提高城市路网通行能力一结合工程实例，浅析城市交通拥堵点的改造和治理 J.黑龙江科技信息,2 0 1 4(6)：1 4 8-1 50.大蜀山森林公园25QU Xingwei,XIONG Zhuang,CAI Han(16)ZHANG Wei(12)Abstract:The overall design scheme of Hefei Changtong Ring II North Ring Expressway ReconstructionProject is analyzed and studied.The construction conditions of the project are analyzed,its planning isinterpreted,and the functional orientation,the study essentials and the difficulties are obtained.The road crosssection and construction scale of the project are determined through the traffic flow prediction.The overalllayout scheme focusing on how to effectively shield the cross-city traffic on the ring expressway is studied.The layout of interchange nodes and ramps is comprehensively considered.Finally,the key and difficultpoints in the design of the ring expressway are summarized,and the treatment measures for the complexswitching system of the main and auxiliary roads in the road section are proposed.Keywords:overall design;expressway;overall design;interchange node;switching of main auxiliary roadsOverall Scheme Design of Express Reconstruction of G107 in Dongxihu District of Wuhan CityAbstract:Aiming at the problems of low construction standards,low traffic efficiency and frequent trafficaccidents of the current G107,the overall scheme of the express reconstruction of G107 in Dongxihu Districtof Wuhan studied.Based on the functional orientation,service objects and technical standards of the road,combined with the analysis on the planning conditions,construction conditions and traffic volume prediction,the overall scheme of the expressway is studied and determined.The key node schemes for the interchangeand the intersection of one ditch and two roads are specially expounded.Keywords:expressway reconstruction;overall scheme;one ditch and two roadsROADS&COMMUNICATIONComparison and Study on Bridge and Tunnel Schemes for Cross-river Channels under Complex Urban Conditions inNingbo Abstract:With the acceleration of urbanization,there are a growing number of urban cross-river channels tobe planned.In the urban built-up areas,the construction conditions of the cross-river channels have becomemore complex.Generally,the relationship among the cross-river channel,the traffic network,landdevelopment,subway construction,river navigation and other significant constraints should be treated withcaution.There are the advantages and disadvantages of cross-river channels on the types of bridge and tunnel.Taking the channel crossing Fenghua River in Siming Road of Ningbo as an example,the overall layouts of thebridge and tunnel cross-river schemes are studied separately.And the relationship between the bridge-tunnelscheme and the subway is analyzed.After the comparison and analysis on the advantages and disadvantages ofthe bridge and tunnel schemes,the conclusion is that the bridge mode crossing river is the best scheme,whichprovides the reference for the similar cross-river channel projects.Keywords:cross-river channel;bridge and tunnel schemes;subway;sinking pipeLONG Teng(20)Research on Traffic Improvement for an Area of Hefei High-tech Industrial Development ZoneREN Weiqiang(23)Abstract:Based on the research on the improvement of traffic congestion in a certain area of Hefei High-techIndustrial Development Zone,through the analysis on the causes of traffic congestion in the current roads,aseries of proposal is put forward,such as tapping the potential of the existing road network,strengthening themanagement of road parking,optimizing the traffic organization structure and carrying out the localreconstruction of the current road in order to strive for maximizing the release of road traffic capacity underthe less engineering investment.The proposal put forward has certain reference significance for the researchand reconstruction of urban road traffic improvement.Keywords:urban road;traffic congestion;traffic capacity;parking placeStudy on Setup of Slow Traffic System for Yellow River Fenghuang Bridge in Jinan:Abstract:With the development of economy and society and the progress of engineering technology,thedevelopment and the connection of urban areas along the banks of rivers become the subject of urbandevelopment and transportation system.However,the development of motorization has aggravated theproblems of traffic congestion and environmental pollution.As the representative of green slow traffic,thenon-motor vehicles are getting more and more attention.The slow traffic channel crossing river is not onlya display window of city style,but also the direct embodiment of urban life quality.In order to solve theproblem of slow traffic crossing the river,taking the setup of slow traffic system for Yellow RiverFenghuang Bridge in Jinan as an example,the application of different slow traffic organization patternsacross the river are discussed under the different conditions so as to provide reference for the slow trafficorganization of urban channels crossing river.Keywords:slow traffic;river-crossing bridge;pedestrian;non-motor vehicleStudy on Adjustment of Speed Restriction for Urban Roads in Zhoushan.ZHANG Fanglun,WANG Feng(30)Abstract:According to the relevant research and reports in recent years,the urban traffic problems causedby the unreasonable speed restriction are common in China,especially in some high-grade roads.Somesections with the good traffic conditions often lead to the waste of road resources due to low speedrestriction.At present,in some large and medium-sized cities of China,such as Chengdu and Xiamen,therelevant research and practice on the adjustment of speed restriction are carried out,and good efficienciesare achieved.But in the most cities,the problem of unreasonable speed restriction is still common.How toformulate the speed restriction scientifically and reasonably is still an important subject of the urban trafficoperation and management.In order to reasonably formulate the speed limit value of urban road andimprove the road efficiency and traffic safety,relying on Zhoushan City Binhai Avenue Project,after theinvestigation and survey of each road section operation speed,and based on the theoretical calculationmethod of highway speed limit design,the optimization adjustment scheme of the speed limit value isdetermined,and the existing problems of taking the design speed as the speed limit value and thetheoretical basis of taking the 85%percentile speed as the speed limit value of urban road are verified.Keywords:speed restriction;design speed;urban road;85%percentile speedResearch on Design Scheme of Extra High Voltage Line Nodes Involved in Expressway.Abstract:The construction of expressway outside the city is growing vigorously,in which the interactionof the important municipal pipelines,such as expressway,extra high voltage line,oil conveying pipeand gas pipe in the urban area is increasing.Taking the Riverside Channel Pudong SectionConstruction Project as an example and focusing on the node of Zhouhai Substation,the schemedesign of expressway under the condition of extra-high voltage lines is studied.Based on the complexconstruction conditions of extra-high voltage lines,three design schemes of tunnel,ground and lowoverhead are proposed,and are systematically compared and selected.Combined with the pipelinecharacteristics at the nodes of Zhouhai Substation and the design requirements of the riverside channel.ZHU Xiaoyu(26).LIU Huan(33)