With the accelerated pace of road, mountain road construction is at an unprecedented pace. This mountain people become prosperous, early access to the well-off standard of living provides a good foundation conditions. However, the mountain road vulnerable to water damage, during the annual rainy season, roads washed directly convergence landscape, ranging from traffic capacity of roads, heavy traffic will be interrupted, threatening road traffic safety, and caused great economic losses. Now how do water damage prevention measures in mountain road, talking points superficial view.
one reason and of the damaged
1. mountain road terrain, steep curves are sharp, the road is narrow, less protection project setting. The big variations in stream river, flood ferocious, often resulting in flooded roads. At the same time a large number of branches in the flood and debris entrainment, ditches and culverts are often the intake blocked, resulting in poor drainage, flash straight into the road, embankment formation of the gap, affecting the safety of traffic flow.
2. the convergence landscape, easy to back up the river water is easy, swift water, bending more parallel with the river often suffer serious roadbed slope erosion, leading to slope collapse, creating the foundation gap, compromise driving safety. Although some sections set the protection works, but most of the protection works based embedded deep enough,Bailey UGG boots, are often washed the exposed foundation.
3. rainy season, a long time, often heavy rains, resulting in all the mountain vegetation cover is saturated, an increase of the decline in cover weight.
because rainwater infiltration, to cover the bond with the mountain rock face friction decreases,Discount UGG boots, and some cover lost his balance and stability, leading to root out the road slope collapse, while the few sections of the cave because the embankment reconstruction process, due to large blast vibration, so that occurrence of cracks in the rock strata, but did not take any protective measures, when the water involved in rock cracks, loss of balance stability of the generated landslides. Sometimes due to improper artificial excavation dug in the case of more rain, a lot of rain into the soil, destruction of the cohesion between particles, increasing the weight of soil collapse.
4. Because groundwater is rich, so that land-based and grass-roots strength decreased during the rainy season, often causing subsidence become soft subgrade, resulting in poor driving.
5. in the highway reconstruction or alteration (additional) culvert, the culvert does not match the settings of the culvert with the actual location and type of the normal maintenance of roads during the rainy season caused significant water damage risk.
6. While the highway reconstruction on the local economic development has played a positive role, but local residents love is not strong awareness of road and road protection, often in the mountains on the stone slope, debris piled in the road shoulder, slope or embankment caused the collapse, worse, the housing built in the slope, in order to prevent the surface water drainage, road shoulder on the highway and build a clay barrier, resulting in flooding during the rainy season is often the road, endangering traffic safety.
Second, the damaged control measures
1. parallel road and river protection works set, based on appropriate deepen as much as possible, to ensure quality, prevent flood scour. Dig deep for the regular sections of the landslide should be set on the top of the slope drainage ditches, slope gradient should be set different segments. For the high-fill section, in addition to set the protection works, but also planting trees and grass, especially high filling and digging soil sections for planting vetiver, vetiver root system, root depth up to 1-2 meters, both to protect the overall stability of the slope, but also beautify the road, improving the ecological environment.
2. on the soil and grass-roots base strong enough to sink easily become soft subgrade section appears set underground drain or sewer, so that water can be discharged outside the embankment.
3. to firmly establish the concept of governance road must first flood, mountain roads due to terrain restrictions, narrow roads, drains should be better adapted to local conditions on the vertical widening, culvert inlet of grit should be properly deeper in the roads of the vertical and horizontal drainage intensify its efforts to include the daily maintenance of conservation culvert, the patrol road system should uphold the rain, and remove debris in ditches and culverts, and keep drainage facilities in good condition. Conservation in their daily work, and constantly improve the drainage facilities, according to the local climate and geographical conditions, local conditions to develop specific control measures, the damaged seedling from the inspection start destroying the ideological emphasis on prevention, strengthening the anti-damage from the action .
4. increase the
Highway Flood Prevention
1, damaged roads should be designed this control at its source. Design is about engineering quality and an important part of life, in terms of alignment, or the bridge, embankment slope protection design should take into account this factor damaged, conscious elimination of hazards may lead to damaged roads and improve the resilience of the project.
election online in highway design, first consideration should be easy to avoid collapse, slippery areas. Section 316 State Road Jiangbei Xunyang loose rock weathering, south of the mountain is relatively stable, the original line in the election due to long distance walking a few kilometers south, and ultimately chose the north shore, the formation of today's multi-collapse slippery Another example is the Shu River Hanjiang River Bridge, the original building fully into account when the blue beach if the big slide, down to the bridge you can avoid this trouble. Secondly, along the river line selection should take into account flood, reservoir storage, soaking the subgrade, the impact of erosion, should be appropriately high go.
in the engineering design should be based on geological and hydrological conditions, adapt to improve the flood control standards and avoid duplication of investment in the future. Either bridge or retaining wall design should have the necessary embedment depth of flood water will sad, when necessary, set up apron. Mountain highway drainage is particularly important in the design should be considered when setting of a certain drainage facilities, such as ditching or water, rapids slope, retaining walls, drainage facilities and other small blind ditch. Can solve the big problem of small facilities, it is to prevent blockage of the smooth water charge guarantee.
routine road maintenance in the blockage of small bridges and culverts is a prominent issue, not only maintenance is difficult, but very vulnerable to road embankment washed away. Should pay attention to three issues in the design: A, Han should have a certain bottom slope, sediment carried by the mountain torrents smooth excretion. Should generally be consistent with the natural channel. B culvert diameter should be at least twice the diameter of the largest rolling over rocks. C, a travel set in Han sediment control dams, blocking a large sediment, to facilitate the timely removal after the flood.
poor geological conditions of mountain building roads, not the mountains, is the puzzle Hom, in this case, should avoid mountains, under the retaining wall would rather do more, less mountains. Mountains often has become a landslide at the angle of repose, angle of repose once destroyed, will be induced landslides,bailey UGG boots, causing endless trouble.
2, to enhance the daily maintenance, prevention and treatment of the damaged roads. Combination of prevention and treatment should be control of the damaged roads to prevent the main preventive measure. Eliminate the hidden dangers in their daily maintenance damaged, so, road maintenance departments should control as a major task of the damaged roads.
A,UGGs, to strengthen the damaged section of the observation and easy to predict. Activity of some regular observations of landslide arrange for someone, make a record, a comprehensive analysis in time as soon as possible to develop snatches plans to avoid big accidents.
B, flood prevention in non-flood season. Production arrangements in the conservation of water damage on the issues to be considered in advance, before the arrival of the rainy season should ditch, culvert to divert clean pass, to ensure smooth flow of flood water. Highway to divert the drainage slope should be based on the number of poor drainage, prone to clogging the roads, according to division of the catchment area, the necessary additional drainage structures. Highway subgrade under the slope should be based on the roadbed subsidence occurs, deposits in the society's reinforcement in advance to prevent the disease to expand.
C, rainy mountain prevention inspections is an important task of the damaged roads, it can detect danger at any time to clear the blockage Ditch, smooth flow and prevent diseases caused by mud on the road.
D, in the rescue of the damaged, the body should be unloaded after the collapse of the Qing, so as to ensure safety. The landslide should adopt an integrated treatment program can not blindly adopt clear way across the board by clear and sometimes make more clear landslide, the more clear and more. For some small landslides can be more anti-less clear, such as retaining walls for protection to assemble such short, so that slip can achieve the purpose, but also save money.
3, to enhance biological control. Highway Flood control, the use of retaining wall, retaining wall, slope protection measures and other projects, but also should pay attention to biological control, increasing vegetation, improve the natural environment, to reduce soil erosion, slope stability role. Vulnerable to floods on the end of the hoisting and the scouring of the river road, for slope on a variety of grass, plant trees, planted in the ground made Beach water forest, landslide-prone, collapse of the hillside grass, tree planting, so will greatly reduce the damaged roads. In the choice of species should be developed to select those roots, lush foliage, drought tolerant and difficult to pass through the trees and shrubs, such as black locust. Greening and tree planting is a long and arduous work, as long as the one who's not slack constant, the road will improve the ecological environment, the ability to resist natural disasters will increase.
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