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Highway Slope Common Supporting Method

At present, our country mountainous area highway to construct rapid development. In first-class highway construction, were massively deep cut cutting and high embankment slope, its protection outstanding issues. In order to meet the safe and reliable and reasonable economy dual goals, the high slope of disease of thorough analysis and characteristics of its governance engineering scheme discreet choice is very important.

Highway slope along the road to the distribution of wide, natural environmental damage range, if the protection at the same time, can protect the environment and create an environment, the adoption of appropriate greening methods for, can make highway has safe, comfortable, beautiful, in harmony with the environment and other characteristics, which will create considerable economic benefit and social benefit and ecological benefits.

Slope design should follow the 'safe green, water and soil conservation and restoration of natural, environmental protection way' design principle.

On the highway slope protection, must consider the following questions:

(1) the slope stability: protect embankment slope surface from the rains washed out, slowing down the influence of temperature and temperature changes, to prevent and delay the surface of soft rock weathering, broken, eroding evolution process, thus protect the overall stability of roadbed.

(2) the environmental protection: make the project on environment to minimize the disturbing degree, and seek artificially alkali-silica coordinated with the natural environment.

(3) comprehensive effects: comprehensive against the light, prevent dazzle, smoke, induction of driver line of sight, improve landscape slope greening purpose, give full play to the comprehensive benefit protection project.

1, Engineering protection

1.1 plaster and beat noodles

1.1.1 applicable condition:

(1) to all sorts of easy weathering of soft rock (such as shaly sands, shale, thousand pieces of rock, shale SLATE) slope, when rock weathering not very serious when;

(2) the slope protection by itself must be stable, but the slope shape, gradient and smooth unrestrained;

(3) the slope protection, which must be dry, no groundwater rocky slope.

1.1.2 structural requirements:

(1) the plaster ply is commonly 5 ~ 7cm, beat surface thickness for 10 ~ 15cm, generally for thickness sections.

(2) the plaster and beat surface engineering peripheral and not protective slope cohesion place, should strictly closed. As in the slope top do cut ditch, or GouBian also to do with plaster or beat surface protection.

(3) on large surface, precausions or every 5 ~ 10m should set is adjustable seam.

1.2 grouting and tick off seam

Grouting applies to the rocky hard, not easy weathering, rock joints growth inside, but the crack width of smaller rocky cutting slope.

Tick off seam is applicable to the rocky, difficult to weathering, open hard very not development, and joints of deep seams larger jointed rock cutting slope.

1.3 soil-cement slope protection

1.3.1 applicable condition:

(1) suitable for silty and sand, silty clay, clay etc fill slope.

(2) the vulnerable to flood inundated the roadbed fill slope.

(3) can be used in saline soil area.

1.3.2 structural requirements: soil-cement revetment thickness for 10 ~ 20cm. General admixture of general 8% of cement concrete ~ 15%, according to the site during the construction of the admixture was confirmed.

1.4 HuMianQiang

1.4.1 applicable condition:

(1) more for easy weathering of mica rocks, LuNi schist, 1000 pieces rock and other weathering serious soft rock formations and a broken rock location, to prevent continue to weathering;

(2) the slope protection by itself must be substantial;

(3) HuMianQiang, hole HuMianQiang have entity HuMianQiang, arch casing HuMianQiang HuMianQiang and rib type. Entity HuMianQiang used in general soil and rock slope; Empty HuMianQiang used for slope slow in casing 1-0. 75, hole in the window can be used on slope surface (dry) or dry build by laying bricks or stones PianShi; HuMianQiang arch for slope, while the lower strata relatively complete upper slope or those who need protection by individual weak area, slope rock slope steep intact and used when HuMianQiang rib type.

1.4.2 structural requirements:

1. HuMianQiang entities

(1) high and decide on wall thickness, use commonly 0.4 ~ 0.6 m, width is equal to the general DingKuan add H / 10 ~ H / 20; The height of the single stage counterfort 15m usually less than the total height, multilevel wall as usually less than.

(2) along the wall body length set a 2cm every 10m within the expansion joints with reinforced asphalt hemp seam padded. After discharge holes in the sand with rubble and make reverse filter layer to exclude wall drainage.

(3) to build HuMianQiang ago, all the slope rock weathering layer to fresh cleared to weathering quickly, the rocky (like mica rocks, LuNi schist, etc) slope, clear dug fresh gape, shall be immediately repaired after HuMianQiang.

(4) the soils ramming fill top application, lest flow washout.

2. HuMianQiang casing hole

HuMianQiang window casing hole hole for semicircle arch, usually high 2.5 ~ 3.5 m, width 2 ~ 3m, radius 1 ~ 1.5 m. its base, thickness, expansion joints, such as HuMianQiang identical with the entity within hole, according to specific situation PianShi, electrode using dry build by laying bricks or stones on grass, or face.

3. HuMianQiang arch

Arch than hours (across 2 ~ 3m), the arch ring can use 10 # cement mortar build by laying bricks or stones, PianShi arch height depending on the s

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