CN1339633A

CN1339633A - Medium speed direct turning type overpass

Info

Publication number: CN1339633A
Application number: CN 01133300
Authority: CN
Inventors: 刘克勤
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-09-21
Filing date: 2001-09-21
Publication date: 2002-03-13

Abstract

The overpass suitable for facilitating city traffic in cross road makes left turning vehicle capable of turning directly. The technological scheme is that the right main lanes in four different directions are raised to required height higher than that of left main lanes before entering to the overpass so as to provide the turning space for turning left and direct turning left.

Description

The direct steering overpass of middling speed

One, technical field

The present invention relates to a kind of highway cross-over bridge, particularly city, city cross overpass bridge.

Two, background technology

Existing overpass bridge generally adopts cloverleaf formula, directional type, winding type, go in ring and rhombus etc., and it is far away and numerous and diverse that its common issue with is that left turning vehicle detours, and it is big that turning vehicle disturbs main line, and vehicle operating has some setbacks, and safety is not high, take up an area of big, the cost height; The 16th the 40th phase of volume of Chinese invention patent communique discloses a kind of high-speed directly-steering overpass bridge (publication number CN1268602A), it is toward the intersection system central area from four jiaos of start positions of overpass bridge, article two, between the main stem in opposite directions and with it be separated into certain distance gradually between two main in opposite directions bridges of high-order grade separation, make every left-hand rotation bridge behind the broad warp grade separation, realize with left in the same way the level and smooth incision of main line converge, finish direct left steering, thereby it is not smooth to have solved the ubiquitous circuit of existing overpass bridge, left steering detour road line length, the unsafe problem of high speed traveling, but this invention only is applicable to greatly that because of taking up an area of limited on less speedway and suburbs and the belt expressway, city by the place uses, to then can not adopt by the crowded cross traffic main artery of bustling vehicle, the big city of place restriction, do not find effective way so far yet to cushioning the crowded situation of these local traffics.

Three, summary of the invention

The purpose of this invention is to provide a kind of take up an area of little, directly turn to, safe and efficient, vehicle flowrate is big, the ability of dredging is strong, be applicable to the direct steering overpass of middling speed that the bustling cross road in congested in traffic city is built, with the cancellation traffic lights, each is unimpeded quick to driving to make cross traffic main artery, bustling location, city, to change city bustling cross road traffic jam situation.

For reaching above purpose, technical solution of the present invention is: the direct steering overpass of this middling speed is made up of double-layer structure, the main right lateral line of four direction was all brought up to the height that grade separation requires respectively before entering overpass bridge central authorities cross grade separation, form parallel high low head with main left lateral line, turn to the space for main right lateral line left steering provides.When four direction master right lateral line is brought up to the grade separation height, successively tell left-hand rotation bridge and right-hand rotation line, left-hand rotation bridge elder generation and the high-order grade separation of its left lateral line with left master right lateral line low level grade separation, forward cut from left master left lateral line and finish direct left steering behind the broad warp descending; The right-hand rotation line of telling on the right main stem is forward cut from right-hand main bridge after flatting turn, and the right-hand rotation line that You Zhuqiao tells is forward cut from right-hand main stem behind the broad warp descending, thereby finishes right turn.

Adopt the direct steering overpass of middling speed of above technical scheme, not only driving is quick, smooth, safety, and because the main stem craspedodrome, the left steering of four direction all is to have created to turn to the space outside the grade separation center, the mode on edge, Shen becomes staggered up and down mode to the left and right cleverly, make Turning Roadways shorter, dwindle the bridge construction floor space greatly, reduced the overpass bridge cost, bustling cross traffic main artery, city is adopted, thereby the cancellation traffic lights improve the situation that urban traffic blocks greatly.

Four, description of drawings

Fig. 1 is the direct steering overpass floor map of middling speed of the present invention.Among the figure E, S, W, N represent respectively east, south, west, the north to, l, r represent a left side and the right side respectively,

Expression is gone up a slope, " ↓ " expression descending.

Five, the specific embodiment

Medium speed direct turning type overpass shown in Figure 1 is double-layer structure, main stem SrNl, NrSl and main bridge ErWl, WrEl are in central cross grade separation, four direction master right lateral line was all brought up to respectively the height 5500mm of grade separation requirement before entering central cross grade separation, form the parallel height drop with main left lateral line, at this moment four left-hand rotation bridge Sr₁El ₁、Nr ₁Wl ₁、Er ₁Nl ₁And Wr₁Sl ₁Earlier with the high-order grade separation of its left lateral line, behind the broad warp descending again with the right main line low level grade separation of left, forward cut from left master left lateral line again, meet at respectively El₁、Wl ₁、Nl ₁And Sl₁Point, thus direct left steering finished; The right-hand rotation line Sr that tells from right main stem₂Wl ₂、Nr ₂El ₂Forward cut from main bridge respectively after a 2500mm high position is flatted turn through broad warp and to meet at Wl₂And El₂Point is finished direct right turn, and the right-hand rotation line Er that tells from right main bridge₂Sl ₂、Wr ₂Nl ₂Then behind the broad warp descending, forward cut from main stem and meet at Sl₂And Nl₂Point is finished direct right turn.

Claims

1. the direct steering overpass of middling speed is made up of main stem, main bridge, left-hand rotation bridge and right-hand rotation line, and main stem and main bridge are two-layer layout in overpass bridge centre cross grade separation; It is characterized in that: the main right lateral line of four direction was all brought up to the height that grade separation requires respectively before entering overpass bridge central authorities cross grade separation, form parallel high low head with main left lateral line, at this moment, four direction master right lateral line is successively told left-hand rotation bridge and right-hand rotation line, the high-order grade separation of the earlier main left lateral line of each bar left-hand rotation bridge with it, behind the broad warp descending,, forward cut from left master left lateral line again and finish direct left steering with left master right lateral line low level grade separation; The right-hand rotation line is then directly forward cut from right-hand main right track behind broad warp and is finished direct right turn.