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Mountain area highway subgrade and construction method

A technology for roadbeds and roads, which is applied to roads, roads, and the bottom of roads, etc. It can solve the problems of low drainage capacity and easy blockage, and achieve the effects of preventing rainwater retention, protecting roadbeds, and increasing drainage performance

Pending Publication Date: 2019-08-27
CITIC GUOAN CONSTR GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the above-mentioned technical problems of low drainage capacity and easy blockage of the existing roadbed in mountainous areas, the present invention provides a roadbed in mountainous areas, which can expand the effective drainage cross-sectional area of ​​the drainage ditch while ensuring the structural strength of the roadbed, with strong drainage capacity and high drainage capacity. Reliable to protect roadbed safety

Method used

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  • Mountain area highway subgrade and construction method
  • Mountain area highway subgrade and construction method

Examples

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Effect test

Embodiment 1

[0033] A roadbed for a mountainous road, comprising an excavated embankment 1 and a filled embankment 2, where a main drainage ditch 3 is built at the connection between the excavated embankment 1 and the mountain body. The top of the excavated subgrade 1 is provided with several columns of bin grid boxes 4, and the bin grid boxes 4 are arranged from the inside of the main drainage ditch 3 to the excavated subgrade 1, that is, the bin grid boxes 4 are arranged in several columns along the length of the road. It can be understood that the bin grid box 4 is made for filling stones in the gabion net, and most of them are filled with cobblestones with a compression resistance of 60mPa or more. The top of the excavated subgrade 1 described in the Binger grid box 4 is facing the filling subgrade 2 side and is vertically built with a concrete ridge 5, that is to say, the Binger grid box 4 is located at the inner side of the concrete ridge 5 and surrounded by the side walls of the main...

Embodiment 2

[0040] Based on Embodiment 1, a siphon pipe 10 is provided inside the fill roadbed 2 . It should be understood that the water inlet of the siphon pipe 10 is located between the concrete ridge 5 and the bin grid box 4 , and the water outlet of the siphon pipe 10 extends to the auxiliary drainage ditch 9 . Arranged in this way, when the amount of water to be discharged is too large, rainwater can be discharged from the main drainage ditch 3 and the auxiliary drainage ditch 9 at the same time, thereby reducing the drainage pressure of the main drainage ditch 3 . The siphon 10 can accelerate the discharge of rainwater, prevent rainwater from stagnating, and ensure the safety of the roadbed. Wherein, the siphon pipe 10 can generate negative pressure through flow velocity difference to achieve siphon effect, such as an inverted L-shaped pipeline; it can also be a pipeline in which pre-tank water diversion generates negative pressure to achieve siphon effect, such as an inverted S-sh...

Embodiment 3

[0043] Based on embodiment 1 or embodiment 2, in order to eliminate the compaction blind area of ​​filling subgrade 2, improve the compactness of filling subgrade 2 and the overall stability of the subgrade, the junction of described excavating subgrade 1 and filling subgrade 2 is dug as a ladder shape. And for improving the stability of concrete ridge 5, described concrete ridge 5 bottoms are embedded in the excavated subgrade 2 upper ends.

[0044] In addition, because most roads in mountainous areas have a certain slope, the rainwater received by the road will flow down the road, and finally flow out from the side slope of the roadbed or the drainage ditch. In this embodiment, the road surface structure layer 7 is inclined to the side of the main drainage ditch 3. On the one hand, it can make the rainwater on the road flow to the main drainage ditch 3, preventing rainwater from accumulating and affecting driving safety. On the other hand, it can prevent road surface water ...

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Abstract

The invention relates to the technical field of landscape architecture, in particular to a mountain area highway subgrade. According to the technical scheme, the mountain area highway subgrade comprises a cut subgrade and a fill subgrade, a main drainage ditch is constructed at the joint of the cut subgrade and a mountain body, a plurality of gabion mesh cages are arranged at the top end of the cut subgrade, the gabion mesh cages are arranged form the inner of the main drainage ditch to the cut subgrade, a concrete bridge is longitudinally constructed on the side, directly opposite to the fillsubgrade, of the top end of the cut subgrade, the concrete bridge is higher than the top surfaces of the gabion mesh cages and the fill subgrade, a water-proof layer is paved on the top surfaces of the gabion mesh cages, the top surface of the fill subgrade, and the top surface of the concrete bridge and the top surface of the water-proof layer are used for paving a pavement structure layer. According to the mountain area highway subgrade, the structural strength of the subgrade is ensured, meanwhile the effective drainage section area of the drainage ditch is enlarged, the characteristics ofhigh drainage capacity and reliable drainage are achieved, and the subgrade safety can be guaranteed for a long time.

Description

technical field [0001] The invention relates to the technical field of road construction, in particular to a mountain road subgrade. Background technique [0002] In the construction of mountainous roads, due to the undulating terrain and complex geological structure of mountainous areas, the subgrades of mountainous roads are mainly half-dug and half-filled roadbeds. In order to prevent the rainwater from washing the roadbed, it is necessary to build drainage ditches to protect the roadbed. Most of the existing drainage ditches are built on the side of the mountain body. However, the drainage ditch opened on the side of the mountain body has a limited cross-sectional area, so the drainage capacity is low; when flash floods break out in the rainy season or when the rainfall is too large, the rain cannot be drained in time to erode the roadbed or overflow the road surface. Scouring the side slope or filling the side roadbed will cause damage to the roadbed, interrupt traffi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C3/00E01C3/04E01C11/22E03F3/02E03F3/04E01F5/00E03F5/20E01C3/06
CPCE01C3/00E01C3/04E01C11/227E03F3/02E03F3/04E01F5/005E03F5/20E01C3/06Y02A30/60
Inventor 陈涛李绍辉刘小雪陈全付谭静乐义强
Owner CITIC GUOAN CONSTR GRP CO LTD
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