CN202099805U

CN202099805U - Vegetation sand stabilization structure of sand sliding slope

Info

Publication number: CN202099805U
Application number: CN2011201202303U
Authority: CN
Inventors: 张小刚; 周麟; 王成华
Original assignee: Institute of Mountain Hazards and Environment IMHE of CAS
Current assignee: Institute of Mountain Hazards and Environment IMHE of CAS
Priority date: 2011-04-22
Filing date: 2011-04-22
Publication date: 2012-01-04
Anticipated expiration: 2021-04-22

Abstract

A vegetation sand stabilization structure of a sand sliding slope comprises a reinforced concrete frame. The reinforced concrete frame is partially or totally buried in the surface of the sand sliding slope and consists of cross beams and longitudinal beams, and self-advancing anchor rods for pouring cement mortar are disposed at cross positions of the cross beams and the longitudinal beams. The concrete frame is combined with the self-advancing anchor rods, so that the vegetation sand stabilization structure of the sand sliding slope can effectively fix the sand slope and avoids harm due to sand sliding.

Description

The sand-sliding slope vegetation fixes the sand to construct

Technical field

The utility model relates to the structure that are used to administer the landslide, especially for the reinforced concrete structure of sand-sliding slope improvement.

Background technology

The sand that slips means high steep rock matter slope, under strong physical weathering, forms a large amount of sand grains and landwaste, and these sand grains and landwaste the motion of multiple mode take place and be piled into the nature evolution process on taper slope at toe under action of gravity.The taper deposit of slide sand is called sand-sliding slope.

The sand disaster of slipping is a kind of comparatively special mountain region disaster.The maximum characteristic of sand-sliding slope is a prose style free from parallelism structure, and the cohesive strength between the particle is very little, is " a heap of a loose sand ".As long as excavation sand toe, or sand slope table portion vegetation deterioration, the sand slope will acutely slip, the safety of harm highway, railway and Other Engineering building.

The slide sand of the southeast, China Tibet is extremely grown.The section in valley, the Parlung Zangbo upper reaches especially, sand-sliding slope distribute continuously in groups, and as along Parlung Zangbo main flow Sichuan-Tibet highway (national highway 318 lines) the Mi Dui exit or entrance of a clitch～middle monolith, the sand-sliding slope that only just distributes in kilometer highway section surplus in the of 20 surpasses 30 places.Nearly decades; Violent further slide sand is movable; Brought great difficulty for local transport development; Frequent rubble and the sand grains of taking place slips to highway, the incident that covers the road surface, bury engineering services, suspend traffic, even the boulder, the megalith that take place to carry under one's arms in the slide sand often smash vehicle and injure pedestrian's accident by a crashing object.Last century the mid-80; The especially big mountain torrents that monolith Parlung Zangbo Jiang Shangyou rice heap ditch glade bursts and produces in the Sichuan-Tibet highway; The a large amount of highway subgrades of monolith and sand-sliding slope toe in destroying by rush of water, the large-scale sand-sliding slope that makes nearly 20 places is aggravating activities again, suspends traffic more than half a year.According in recent years estimation, this section Sichuan-Tibet highway every year because of slip that the sand disaster causes directly and indirect economic loss can be above 10,000,000 yuan.

Along with the process of development of the West Regions, the regulation of Sichuan-Tibet highway, upgrading construction are in full swing, and the aggravating activities of slide sand has become a great problem that influences engineering construction.The Chinese Academy of Sciences-Ministry of Water Resources's Chengdu mountain region disaster and Environmental Research Institute from last century the nineties just carried out latter stage slipping the integrated control research of sand disaster.

The sand disaster of slipping is the new disaster problem that in mountain road is built, proposed in nearly ten years.Owing to do not carry out deep research, also there is not the perfect method of preventing and treating of a cover so far.Engineering design department haves no alternative but, and uses the retaining wall principle, builds sand block wall control slide sand.For a comparatively complicated system of causing disaster; Administer with a simple prevention and cure project, obviously be very incomplete, and have problems; Design considerations and theory like the sand block wall are not set up, and cause to occur in a large number that the sand block wall tilt to lose efficacy, sand body covers problems such as wall top harm highway.

Utilize the firm slope of vegetation protection to become an important content of slope reinforcement protection engineering.Its principle is to utilize the reinforcement effect of root system of plant to domatic table portion soil layer.Its shear strength of slope that contains root system is the comprehensive of the soil body and two kinds of materials of root system, and its engineering mechanics performance can obviously improve.The researcher finds also that in the multiple district investigation of the slide sand disaster of western mountainous areas the tree of well developed root system and shrubbery, grass have stronger solid sand ability.Not only timeliness is long to utilize the protective action of the solid sand of vegetation, also has unique environment protection significance, can play the effect that improves environment, but plant is difficult to survive on the sand slope of activity, and measure is produced effects slowly, becomes a difficult problem in the practical operation.

The utility model content

The purpose of the utility model provides a kind of sand-sliding slope vegetation and fixes the sand to construct, and is intended to effectively fixedly sand-sliding slope, solves the harm that the slide abrasive band is come.

This novel purpose is achieved in that a kind of sand-sliding slope vegetation fixes the sand structure; Comprise; The reinforced concrete frame that partly or entirely is embedded in the sand-sliding slope surface is made up of crossbeam and longeron, and the infall of crossbeam and longeron is provided with the self-feeding anchor pile of cement injection mortar.

Above-mentioned crossbeam spacing is 5m, and girder space is 8m, and the sectional dimension of crossbeam and longeron is 30 * 30cm; Said self-feeding anchor pile is the R32S self-feeding anchor pile, this rock-bolt length 4～6m.

Cultivate on sand-sliding slope surface between above-mentioned crossbeam and the longeron has vegetation.

Surface, sand slope in the need control is provided with reinforced concrete frame; The framework infall is provided with self-feeding anchor pile; After preliminarily stabilised sand slope is domatic; Combine husky sloping vegetation to cultivate the purpose that (select preferential species of tree, grass seeds drilling, bunch planting or broadcast sowing, adopt grass to irritate to combine, the mode of a kind, through a whole set of transplanting, sow and foster method and measure to improve the vegetation survival rate) reaches solid sand again.

The advantage of the utility model:

When 1, root system is grown in sand body, the tip of a root will to around produce axial compression, make sand slope cohesive strength, cut expansive force and frictional force increases, root system is secreted some chemical substances in growth course simultaneously, helps the gluing of particle.The character that these have fundamentally changed sand slope prose style free from parallelism structure reaches the effect of solid sand.

2, vegetation can quicken sand slope soilization, helps the recovery and the reconstruction of ecological environment, and the sand slope stability is increased.

3,, explain that the effect of the solid sand of this method is fine through monolith experiment and demonstration in national highway 318 lines (Sichuan-Tibet highway).

Description of drawings

Fig. 1 is the layout sketch map of the utility model.

The specific embodiment

Referring to Fig. 1; Reinforced concrete frame 1 (frame part or all imbed the sand-sliding slope surface) is set on the husky sloping surface of need controls to be made up of crossbeam and longeron; Be " well " font and arrange, girder space is 8m, and the crossbeam spacing is 5m; Beam is the C25 reinforced concrete structure in length and breadth, sectional dimension 30 * 30cm.Cultivate on sand-sliding slope surface between crossbeam and the longeron has vegetation.

Vertical, crossbeam infall is provided with R32S self-feeding anchor pile 2, and rock-bolt length 4～6m adopts the cement mortar perfusion, grouting pressure 0.3Mpa.

Select preferential species of tree, grass seeds, preferably local seeds, grass seeds are as the pionner of sand-sliding slope improvement.Through demonstration area comparative study, the first-selected species of shrub are currant, are Radix seu cortex hberberidis heteropodae and thin,tough silk hair rose secondly; The first-selected Achnatherum inebrians of herbaceous plant; Sweet sweet wormwood of fruticuli and silver-colored wormwood artemisia also can be introduced in right amount.

Adopt grass to irritate to combine, the mode of a kind, through a whole set of transplanting, sow and foster method and measure to carry out the solid sand engineering of vegetation.

Transplanting, seeding method such as 1. adopt drilling, bunch planting, broadcast sowing.

2. transplanted seedling should be selected to be of moderate size, and is excessive too small all unsuitable the strong sprout of height 30～50cm, digs Miao Shiying and do not hinder root as far as possible, is completely cured.

3. during nursery stock transplanting, dig 20cm * 20cm hole earlier, 0.5 kg of water is fallen in every then cave, after putting into transplanted seedling and treading ridging, adds low amounts of water, again cover sand.

4. as far as shrub, transplant density and should keep higher density at first: spacing in the rows * line-spacing=0.35～0.4m * 0.5～0.6m after dredging certainly through natural death then, reaches suitable density.Shrub is transplanted fruticuli or draft in the ranks again, every row 4～5 strains (clump).

5. transplanting time should be selected in light rain or the cloudy day carries out, otherwise, transplant and should water once permeable in back first day.

6. sand-sliding slope should be strengthened management, foster through transplanting with after planting, forbids people and animals to trample on and herd in going at least in two years.

Framework anchor pole vegetation sand consolidation technique main points:

When 1, the utilization present technique is implemented engineering practice, at first tackle geology and geomorphology environment, composition structure, ecological state and the meteorological condition etc. on sand slope and carry out complete investigation.

2, according to the concrete condition of sand-sliding slope, adopt suitable civil engineering measure, with surface, preliminarily stabilised sand slope, for plant is settled down the creation precondition.Present technique has adopted measures such as building concrete frame, can't pore-forming on the sand-sliding slope of this external activity with common creeping into, and the hole of collapsing easily, present technique has adopted the automatic anchor pole construction technology, can solve this technical barrier.

3, option of species and species quantity thereof are wanted suitably, carry out the species collocation, irritate grass and combine.Indigenous plant (endemic plant) is adapted to local ambient conditions for a long time, is the result of natural selection, and compliance is strong, and strong stress resistance is transplanted or live easy success, should preferentially select.In a single day it settle down, survive, and can realize sustainable protection effect.

Claims

1. a sand-sliding slope vegetation fixes the sand to construct, and it is characterized in that: comprise that the reinforced concrete frame (1) that partly or entirely is embedded in the sand-sliding slope surface is made up of crossbeam and longeron, and the infall of crossbeam and longeron is provided with the self-feeding anchor pile (2) of cement injection mortar.

2. sand-sliding slope vegetation according to claim 1 fixes the sand to construct, and it is characterized in that: said crossbeam spacing is 5m, and girder space is 8m, and the sectional dimension of crossbeam and longeron is 30 * 30cm; Said self-feeding anchor pile (2) is the R32S self-feeding anchor pile, this rock-bolt length 4～6m.

3. sand-sliding slope vegetation according to claim 1 and 2 fixes the sand to construct, and it is characterized in that: cultivate on the sand-sliding slope surface between said crossbeam and the longeron has vegetation.