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A highway widening method at the overpass

A technology for highways and overpasses, which is applied to roads, roads, buildings, etc., and can solve problems such as large land occupation, large environmental impact, and complex engineering

Active Publication Date: 2021-06-18
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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  • A highway widening method at the overpass
  • A highway widening method at the overpass
  • A highway widening method at the 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 a wall-type underground continuous structure at the side of the original road, the method can maintain the stability of the original road after the side slope of the original road is excavated, and at the same time provide It is possible to reduce the width of the road surface elevation to meet the clear height, and to increase the possibility to meet the requirements of the horizontal clear width, that is, to provide the possibility of direct width. At the same time, through the reasonable marking of markings, the setting of lane dividers in the same direction, supplemented by necessary traffic signs, can guide vehicles to drive safely. The method of the present invention has the advantages of: by setting the wall-type underground continuous structure and the lane divider in the same direction, it provides a way to solve the clearance problem that may be caused by direct widening under the overpass, and provides a beneficial way for the widening of the expressway at the overpass. This method can avoid problems such as large land occupation, large project scale, and large environmental impact caused by demolishing the overpass for reconstruction or separating and building 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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Patent Type & Authority Patents(China)
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