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重庆最复杂立交设计师:走错路,10分钟就能转换

2017-06-02 07:40:45   新京报

刘帮俊:不会出现这种情况。如果有司机开错路了,即出现方向选择失误的情况,可以通过附近其他立交桥进行道路转换,周边相邻立交桥的间距均在4公里以内,距离很近,转换的正常车程也在10分钟以内。

新京报:有人建议,不同匝道或不同路线应涂上不同颜色,将黄桷湾立交桥弄成"彩虹桥"以增加司机通行的辨识度?

刘帮俊:我个人觉得不太好。从景观上看,立交桥是个单体工程,最好还是维持统一的颜色,涂上不同颜色会显得花花绿绿,可能对周边大环境的和谐不太好。再加上在立交桥下,也正在进行绿化工程,最好颜色还是以统一协调为主。

“最复杂立交”设计花了5年

新京报:黄桷湾立交桥设计了多久?有何难度?

刘帮俊:这个项目的设计时间很长,从2004年开始研究方案,花了5年时间才完成设计。2009年完成设计后,开始施工,到现在施工基本完成也用了7年时间。

设计上要考虑交通组织、交通识别性等问题,在用地范围有限的情况下,设置5层结构20个匝道,实现各等级道路之间的转换,还是比较麻烦的。而且为了不影响交通,必须创新采用特殊结构和特殊工艺,都用在一个立交桥上,增加了一定难度。

新京报:项目的设计方案复杂,且时间跨度也较大,中间有过设计变动吗?

刘帮俊:我们在设计过程中是没有改变方案的。只是在施工过程中,根据实际出现的问题进行了一些调整,但大多只是施工工序的调整。

新京报:施工过程中有难度吗?

刘帮俊:施工难度还是有一些的。施工期间,为保证既有交通道路的正常通行,桥梁结构采用很多特殊结构,比如钢管混凝土格构柱、叠合梁等,同时采用顶推施工等多种特殊工艺,实属不易。比如上层桥施工时下面路要通行,那么就要选用跨度大的梁进行施工连接,有的单个跨度就有49米。还有因为立交桥层数较多,在立交桥上下层的施工排序上也花费了很多功夫。

“热议和吐槽都很正常”

新京报:除了被公众评价为"最复杂立交",黄桷湾立交桥自身有什么特点?

刘帮俊:首先这个立交桥的功能明确,层级分明,形成了两套体系,上面四层实现了快速交通和快速交通的转换,最下层保留了原来快速交通和慢速交通的转换。同时黄桷湾立交桥是资源节约型立交桥。此处自然地形的高差比较大,大概有50多米,立交桥自身的高差也有30米左右。本来地形高差是不利条件,但我们充分结合地形高差,形成以定向匝道为主的五层立交。而且我们还充分利用原来立交桥的用地,该处本有个老立交桥,在改造时我们尽量用原有立交桥的用地,以减少对周边环境的影响和冲击,实现土地节约利用。

新京报:后续还有哪些措施减少司机走错路?

刘帮俊:可以考虑改进交通告示牌的设置,比如交通告示牌上的地名设置,可先设大地名,再设小地名等。在征集更多公众意见后,这些都可以改善的。

新京报:面对网上的各种吐槽,作为设计负责人心情如何?

刘帮俊:这几天本来有点忙,听到同事说这事后,就去了解了一下,其实对我们来说也没觉得特别怎样。我觉得网络上的热议和吐槽都是很正常的,普通公众对立交桥的理解没这么专业,对由来和为什么这么设计不太了解。

当然专业人士不会这么看,专业内外的人理解存在差异是很正常的事情。可能还有些人为了吸引眼球,找一个特殊点放大,其实大部分人说立交桥复杂只是看到了网上的照片,觉得密密麻麻很复杂,这都是很直观的感受。而实际上没有问题,这个立交桥的交通识别性还是不错的,真的走起来还是很好认路的。

责任编辑:孙启浩 CN037
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