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Method for widening expressway at overpass

A technology for highways and flyovers, applied in roads, roads, climate change adaptation, etc., can solve problems such as large environmental impact, large land occupation, and complex engineering

Active Publication Date: 2019-01-18
ZHEJIANG PROVINCIAL INST OF COMM PLANNING DESIGN & RES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In view of the above, the present invention provides a method for widening the expressway at the overpass, which can directly connect the roads outside the overpass and solve the problem of other schemes such as dismantling the overpass and rebuilding or separating and building a new road. , complex engineering, large environmental impact and other issues

Method used

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  • Method for widening expressway at overpass
  • Method for widening expressway at overpass
  • Method for widening expressway at overpass

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] This embodiment widens the original road structure as shown in Figure 1 (a), specifically including the following steps:

[0038] S1: Construct a wall-type underground continuous structure at the original roadside on the widening side. As shown in Figure 1(b), the height of the original embankment in this embodiment is 5m. According to the calculation, the clearance of the widening part is less than about 1.5m, and the thickness of the pavement structure layer in the widening part is 0.8m. Therefore, the cantilever part of the underground continuous structure is about 2.3m. According to this Determination: The underground continuous structure adopts densely packed high-pressure jet grouting piles, which are convenient for construction. The diameter of the piles is 0.8m, the distance between piles is 0.6m, and the pile length is 6m. Before construction, auxiliary preparations such as traffic organization and safety warning signs for operating expressways should be done; ...

Embodiment 2

[0053] Embodiment 2: (when the overpass is located in the intercommunication area)

[0054] The upper-span bridge is an upper-span bridge in the intercommunication area. Since the entrance and exit ramps are located in the aforementioned transition section, and because the vertical alignment of the ramp leaving or entering the main road conflicts with the longitudinal alignment of the lanes that the main road gradually exits, if the The construction of vertical and horizontal slopes will cause unevenness on the road surface in the overlapping area, which cannot guarantee normal driving. In order to solve this problem, this example solves the problem by changing the entrance and exit of the ramp, moving the entrance and exit beyond the two ends of the lane divider in the same direction, so as to avoid the overlapping phenomenon; the specific implementation is to insert the step of changing the entrance and exit of the ramp before the aforementioned step S1. The construction met...

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Abstract

The invention discloses a method for widening an expressway at an overpass. By constructing the wall-type underground continuous structure at the side of the original road, the method can maintain thestability of the original road after excavation, at the same time, it provides the possibility for reducing the height of widening pavement to meet the net height, and also increases the possibilityfor satisfying the demand of lateral widening, that is, it provides the possibility for direct widening. At the same time, through the reasonable marking, set up the same lane separation belt, supplemented by the necessary traffic signs, can guide vehicles to drive safely. A method accord to that invention has the advantages that: A wall-type underground continuous structure and a co-directional lane partition are arranged, In order to solve the problem of clearance caused by direct widening under the flyover, a beneficial method is provided for widening the expressway at the flyover. This method can avoid the problems such as more space, large project scale and large environmental impact caused by demolishing the flyover and rebuilding or separating a new road.

Description

technical field [0001] The invention belongs to the technical field of road engineering, and in particular relates to an expressway widening method at an overpass. Background technique [0002] Expressway reconstruction and expansion involves road widening. The easiest way to widen is to directly widen. It has the advantages of less land occupation, small project scale, low cost, small environmental impact, and convenient construction. Therefore, it is the preferred widening method for expressway reconstruction and expansion. . [0003] However, when there is an overpass, it is often difficult to implement due to the clearance of the overpass, which is manifested in the following aspects: [0004] (1) The net height is less than 5m, which does not meet the requirements of expressways. After the expressway is directly widened, it is still a whole section, and the horizontal lanes are arranged next to each other. The road surfaces of adjacent lanes are smoothly connected, an...

Claims

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Application Information

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IPC IPC(8): E01C1/00E01C1/04
CPCE01C1/002E01C1/04Y02A30/60
Inventor 姜正晖
Owner ZHEJIANG PROVINCIAL INST OF COMM PLANNING DESIGN & RES CO LTD