第5期(总第265期）域命;1科5衫浃
2021 年5 月 URBAN ROADS BRIDGES & FLOOD CONTROL 道路交通DOI：10.16799/jki.csdqyfh.2021.05.007
国道110线包头北绕城段公路单喇叭互通立交选型研究
陈赣浙
[上海市城市建设设计研究总院（集团）有限公司，上海市200125]
摘要：由于B型单喇叭互通立交在主线车辆高速驶人低速环形匝道，同时A匝道上跨的情况下，主线车辆驶出环 形匝道视距不良，因此我国绝大多数单喇叭互通立交采用A型。依托国道110线包头北绕城段公路工程实例，结合交 通量、平纵线形、视距等方面因素，对A型、B型单喇叭互通立交的工程适用性进行了详细分析，并对具体方案进行了 比选。总结认为，在主线左转驶出流量不大、A匝道下穿主线不影响驶出匝道视距等情况下，B型单喇叭立交型式并不 劣于A型单喇叭立交型式。
关键词：单喇叭互通；A型单喇叭；B型单喇叭；方案比选
中图分类号：U412.35 文献标志码：B文章编号：1009-7716(2021 )05-0023-03
0引言
单喇叭互通立交是用一个环形左转匝道和一个半定向左转匝道组成的完全互通式立体交叉，是三路立交的代表形式W。单喇叭互通立交因其匝道较少、匝道间连接简单、构造物较少、布设灵活等特点而被业界广泛采用，尤其是该立交型式易于设置收费、管理场所，更适合我国国情，因此逐渐成为我国互通立交典型型式。
单喇叭互通立交分为A型和B型，经环形左转匝道驶入主线的型式为A型，驶出主线的型式为B 型。一般来说，立交布设时应将环形匝道设在左转交通量较小的方向上，主线左转弯交通量大时宜采用A型，反之可采用B型。两种布设型式各有利弊。与 A型相比，B型的缺点是：车辆从主线高速驶出进入低速环形匝道，当A匝道上跨时，主线驶出环形匝道视距不良。因此，我国的单喇叭互通立交，绝大多数采用A型，采用B型较少。图1为单喇叭互通立交型式。
U)A 型 （b)B型
图1单喇叭互通立交型式
本文依托国道110线包头北绕城段公路工程实例，结合交通量、平纵线形、视距等要素，对A型、B 收稿曰期：2020-11-23
作者简介：陈篛浙（1990—)，男，硕士，工程师，从事道路工
程设计工作。型单喇叭互通立交的工程适用性进行详细分析。
1工程概况
国道1丨0线包头北绕城段公路是包头市“十三
五”交通运输发展规划“二环五纵八横”中的“二环”
之一，是“十三五”公路规划中的重点建设项目，是内
蒙古自治区及包头市重要的东西干道，与京藏高速同
属包头市的过境干线。该项目的建设意义：连通东至
呼和浩特、西至巴彦淖尔市的整个东西呼包鄂经济
带，直接影响到包头市的社会经济发展。
项目路线起于西北门回民公墓处（110国道
K655+100)，经石拐新区、青山装备园区、花丼园区、
在一机渣场、一机靶场、物流园区、边墙壕，止于国
道110线与省道211青固线交叉处（110国道K678+ 800)。
项目包括主线和连接线，其中北绕城公路主线全
长26.121 k m，兴胜互通至市区/2丨0国道的连接线全
长13.05 k m。项目全线共设置单喇叭互通立交2处，
分别为喜桂图南互通立交和兴胜互通立交。主线及连
接线采用相同的设计标准。
(1)公路等级：一级公路。
(2)设计速度：80 k m/h(主线及连接线），40~ 50k m/h(立交匝道）。
(3)行车道宽度：2x(3_75 m x2)。
(4)断面宽度：25.5 m(整体式路基断面），32.0m (城镇段道路断面），12.75 m(分离式路基断面）。
(5)路面结构：采用沥青混凝土路面，设计使用年限15 a，设计标准轴载B Z Z-100k N。
图2为国道110线包头北绕城段公路总平图。
陈赣浙：国道11 o线包头北绕城段公路单喇队互通立交选型研究2021年第5期
2喜桂图南互通立交
2.1功能分析
210国道是南北向重要的干线国道，现状为一级
公路标准，本节点作为重要的交通转换节点应当设
置互通立交。
根据交通量预测结果，2037年出人交通量为
6 431 p c u/d，主、次流向交通量不大（见图3)。
G210
图3目标年喜桂图南互通转向流量图（单位：pcu/d)
2.2主要控制因素
(1)髙压走廊
现状G6高速北侧有4道高压走廊。
(2)现状互通
现状G6高速与210国道九原互通为双喇叭互通，包石一级公路与210国道后营子互通为单喇叭互通，均已建成。
2.3节点方案
2.3.1方案一（A型单喇叭）
如图4所示，北绕城主线下穿包石一级公路(S506)，预留桥孔，向北上跨210国道后设置A型单喇叭互通（主线无下穿空间，A匝道上跨主线）；地面平交口承担北绕城、210国道、包固公路的转向交通功能。
2.3.2方案二（B型单喇叭）
如图5所示，北绕城主线下穿包石一级公路(S506)，预留桥孔，向北上跨210国道后设置B型单喇叭互通（主线无下穿空间,A匝道上跨主线）；地面平交口承担北绕城、210国道、包固公路的转向交通功能。2.3.3方案比选
根据交通流量分析，主线转出流量较小，采用A 型或B型单喇叭均可。
从工程角度分析，方案二（B型单喇叭）将互通区南侧人口变速车道设置在700 m小半径桥梁段，A 匝道上跨不利于主线南侧出口端部识别，对主线南侧出口视距有较大影响，存在一定的交通安全隐患，同时方案一征拆量较方案二略低。
因此，综合考虑，推荐喜桂图南互通采用方案一(A型单喇叭）。喜桂图南互通方案比选见表1。
3兴胜互通立交
3.1功能分析
兴胜互通至市区/2丨0国道连接线是包头青山一大庙一五当召公路的一部分，是青山区向包头北部地区重要的射线道路之一，交通地位十分重要，现状为二级公路标准。本项目中，连接线将改建为一级公路，本节点作为重要的交通转换节点应当设置互通立交。
根据交通量预测结果，2037年出人交通量为
2 054 p c u/rl，主、次流向交通量不大（见图6)。
3.2主要控制因素
(1)花卉园区
节点西北角为花丼园区，互通方案应尽量对其避让，降低前期费用和实施难度。
(2)包头服务区
202丨年第5期
陈赣浙：国道110线包头北绕城段公路单喇叭互通立交选型研究
同向超高接人，横坡差为
在公切点接人主线，横 1.5%；加速车道位于700 m 坡差为1.5% 半径且设在3%超高的桥
梁段上，不利于交通安全
表1喜桂图南互通方案比选
比选项目
方案一（A 型单喇叭）
方案二（B 型单喇叭）
主线分曲线外侧分流，连接 同向超高分流，横坡差为
流位置部横坡差为4% 1.5%1道
D 1
满足规范要求，但由于受
〇2
视距
满足规范要求
A 匝道跨线桥影响，视距低于方案一
E 2
主线纵断面210国道跨线桥区域
可不受立交区竖曲线指 标控制210国道跨线桥区域应
受立交区竖曲线指标控制， 增加工程量主线
视线驶出 诱导
匝道
出口匝道D 1设置在 主线S 形曲线前，视线 诱导好
A 匝道以S 形曲线上
跨主线，视线诱导不佳
出口匝道D 2设置位置紧 接在主线S 形曲线后，视线 诱导较差
A 匝道以同向圆上跨主
线，视线诱导较好
拆迁量/m 2 占地面积/hm
9 27216.5
10 36018.4
连接线
图6
目标年兴胜互通转向流量图（单位：pcu /d }
现状G 6高速包头服务区刚刚建成，互通方案须 对其避让。
(3)高速交警支队
位于节点东北角，互通方案应对其避让。
3.3节点方案
3.3.1方案_(A 型单喇叭}
如图7所示，主线与连接线立交采用A 型单喇 机互通（主线有下穿空间，A 匝道下穿主线），互通范 围内主线上跨连接线及K 30+813处地方道路。方案 要求拆除部分花丼园区大棚，避让交警支队、高速服 务区，与物流园区规划没有矛盾。
3.3.2方案二（B 型单喇队）
如图8所示，主线与连接线立交采用B 型单喇 口八互通（主线有下穿空间，A 匝道下穿主线），互通范 围内主线上跨连接线及K 30+813处地方道路。方案 要求拆除部分花卉园区大棚，避让交警支队、高速服 务区，与物流园区规划没有矛盾。
3.3.3方案比选
根据交通流量分析，主线转出流量较小，采用A 型或B 型单喇叭均可。
从工程角度分析，A 匝道方案一（A 型单喇叭）与 方案二（B 型单喇叭）征拆面积相近，但A 匝道线形 方案二优于方案一，且由于主线有下穿空间，A 匝道 下穿主线后，B 型单喇叭型式也不会对主线出人口
视距造成不良影响。
因此，综合考虑，推荐兴胜互通采用方案二（B 型 单喇叭）。兴胜互通方案比选见表2。
表2
兴胜互通方案比选
比选项目方案一（A 型单喇叭）
方案二（B 型单喇叭）
主线出人口
A 匝道下穿主线，对主
A 匝道下穿主线，对主
视距
线形诱导标志线出入口视距均无影响
线出人口视距均无影响A 匝道线形
S 形曲线上跨主线，行
同向圆上跨主线，行车车视线一般
视线较好
拆迁量1 328 m 21 558 m 2占地面积
15.7 m 2
16 m 2
4
结语
单喇叭立交是我国公路立交中应用最广泛的一
种立交型式，且绝大多数为A 型，因此在设计过程 中，往往容易陷人“A 型单喇叭优于B 型单喇叭”的
思维定式。在实际工程中应具体问题具体分析，在某 些特定情况下（主线驶出流量不大、A 匝道下穿主线 不影响驶出匝道视距等），B 型单喇叭型式并不劣于 A 型单喇叭型式。
参考文献：
⑴杨少伟.道路勘测设计[M ].北京：人民交通出版社，2009.
入线
置接主位口道丨 入匝E
Overall Design of Datong South Central Ring Rapid Reconstruction Project ..........................................MA Le ( 11 ) Abstract：South Central Ring Rapid Reconstruction Project is the largest east-w est traffic corridor in Datong City in the future, which effectively connects the new and old urban areas and the railway air transportation hub. The overall design of the rapid reconstruction of South Central Ring is described in detail. Combined with the analysis of the current road section and traffic dem and, the section optimization design is carried out. Through the summarization of the current horizontal road network and the setting of important node interchanges, the specific schem e for the ram p setting of expressway system is put forward.
According to the design of road crossing river and interchange, the effective solutions are proposed by borrowing the current terrain so as to reduce the reconstruction of the existing road facilities. Finally, the relevant experience is concluded for the construction of rapid connection of old and new urban areas.
Keywords：urban road, rapid reconstruction, cross section design, layout of ram p system, interchange design
Study on Reconstruction Schem e of Intersection of X ihuan Road and W est Y ushan Road in Panyu District ....................................................................................................................................................LIN Nengyou, WU W eihao ( 15 ) Abstract：Aiming at the problems in the intersection reconstruction of X ihuan Road and W est Y ushan Road in Panyu D istrict of Guangzhou City, com bined with the regional development, functional positioning, current conditions and other factors, the conditionality factors of intersection reconstruction are analyzed.
The "4-stag e" method is used. The prediction model is established according to the data of current road network flow obtained by the traffic observation to predict the traffic flow. On the basis, the reco
nstruction scheme of separated interchange is selected by the analysis and com parison of many design schemes. After several rounds of expert argumentation, it is considererl that the separated interchange schem e m eets the actual situation of intersection, is im plem entable and also reserves the reconstruction conditions for the further increm ent of long-term traffic flow.
Keywords：interchange reconstruction, displacem ent left-tu rn, separated interchange
Study on Scheme of Jiaxuan South Avenue and New G320 Interchange in Shangrao City ........................................... ................................................................................................................................................................................XIONG Xin ( 20 ) Abstract：W ith the increasing acceleration of urbanization progress and the continuous extension of urban frame, Guangfeng Area is brought into the central urban area of Shangrao City. The urban expressway network system is planned to construct The planning and design issues of urban expressway interchange are started to face. Based on the traffic demand prediction and construction condition analysis on the node of Jiaxuan South Avenue and New G320, the different interchange design schem es are proposed, and com prehensively com pared from the interchange functions, types, safeties and costs. Finally, the interchange schem e is determ ined in order to provide the reference for the sim ilar projects.
Keywords：urban expressway, interchange, schem e comparison, basic farmland
Study on Selection of S ingle-horn Interchange for Baotou North Beltway Section Highway in National Highway 110 ...................................................................................................................................................................CHEN Ganzhe ( 23 ) Abstract：Because of Type B single-horn interchange where the main line vehicles highly speed into the low-speed ring ramp, also under the condition of O n-ram p A, the sight distance of main line vehicles leaving ring ram p is bad. Therefore, the most of single-horn interchange adopt Type A in China. Relying on the case of National Highway 110 Baotou North Beltway Section Highway Project, com bined with the traffic flow, plat and vertical linear, sight distance and the other factors, the engineering applicability of Type A and Type B single-horn interchanges is analyzed in detail. The specific schem e is compared. The
conclusion shows that Type B single-horn interchange is not inferior to Type A single-horn interchange in the case that the leaving flow of the main line on the left turn is not large and the main line of O ff-ram p A does not influence the sight distance of ramp.
Keywords：single-horn interchange, Type A single horn, Type B single horn, schem e comparison
Analysis on Node Reconstruction of Partial Interchange ...................................................................CHEN Na ( 26 ) Abstract: Interchange plays an important role in urban traffic system, and it is the key node of urban road network. An indispensable part of interchange, whether the design of ram p is reasonable or not is directly related to the function of interchange, the safety and smoothness of driving, the economics of operation and the investm ent of engineering. Taihe East Bridge in Beijing Economic and Technological Development Zone is a double cloverleaf interchange. Taking this interchange adding the turning ramps for realizing the full interchange of nodes as an example, through the combing of the current conditions, interpretation of the planning scheme, understanding of the project function and consideration of the design scheme, the final design schem e is determ ined. The design schemes of this interchange to add two left-tu rn ram ps are analyzed, com pared and summarized, which provide the experience and reference for the sim ilar projects.
Keywords：grade separation, partial interchange, ramp, full interchange, schem e design
Overall Design Method and Typical Function Division of Pilotless Automobile Test Field ........................................ ............................................................................................................................................................................KONG
L in g q i(31) Abstract：Aiming at the im portant carrier of pilotless autom obile operation safety test -pilotless autom obile test field, the overall design method of studying test scene -building scene model — dem and of infrastructure -integrated im plem entation of facilities is put forward. Four kinds of main test scenes of road traffic class scene, efficiency class scene, information service class scene, and communication and orientation capability class scene are summarized. The basic method from the model establishm ent to integrated im plem entation of facilities is given. Combined with the industry technical standards at home and abroad, the typical function divisions of urban block, rotary road (including high-speed test), low grade highway and m ultifunction test area are proposed. Finally, the conclusion shows that the pilotless autom obile test field as a new engineering design type involves many subjects of vehicle, communication, transportation and so on. Its overall design is faced with the great indeterm inacy and growth, which must keep up with the new technology and new orientation adjustm ent and perfection of each professional subject.
Keywords：unpiloted, test field, test scene, overall design, function division
Study on Layout and Scale of Urban Expressway in Coastal Cluster Structure .........................JUAN Haimin ( 33 ) Abstract：The layout and scale of urban expressway network are determ ined by the urban spatial pattern, road network form, traffic dem and characteristics and other factors. Dalian Cit
y is located in the south end of Liaodong P eninsula, and is the obvious cluster city with many m ountains and low hilly. Its traffic network pattern is different from the inland plain cities and its traffic mode is the diversified developm ent.
U nder this background, its status of urban rapid transit is prom inent and im portant. At the same time to synthesize the generalized deciding essen tials, the specific urban structural features and diversified traffic characteristics of Dalian are integrated. The targeted planning principle of "making pattern by shape, m aking scale by resource'* is proposed. Through the functional orientation and combination of "radiation lin e, interval lin e, structure line and transition line'*, the expressway network of "clear functions, balance of supply and d em an d, and m ultiple interactions" is built in order to maximize the utilization benefit of com prehensive traffic resource, enrich and perfect the planning theory and method f urban expressw ay, and also provide the reference for the planning of the sim ilar urban road netw orks.
发布评论