CN204849506U - Anti roadbed structure that collapses of karst area ductility - Google Patents

Abstract

The utility model relates to an anti roadbed structure that collapses of karst area ductility, including soil cement confining bed (4), it has netted gabion structure (3), soil padding (2) and continuous arch structure (1) to cover in proper order on soil cement confining bed (4), and netted gabion structure (3) inside soil cement that is equipped with, netted gabion structure (3) include: reinforcing bar gabion frame (5) and setting up with its reinforcing bar (6) of separating into a plurality of regions in reinforcing bar gabion frame (5). Through using netted gabion structure to improve roadbed structure's the anti ability of collapsing of ductility greatly. The construction method finally obtains anti roadbed structure that collapses of karst area ductility for laying soil cement confining bed, netted gabion structure, soil padding and continuous arch structure in proper order.

Description

The anti-road structure that collapses of a kind of karst area ductility

Technical field

The utility model relates to a kind of roadbed, is specifically related to the anti-road structure that collapses of a kind of karst area ductility.

Background technology

Due to developing rapidly of engineering activity, karst ground subsidence occurs immediately in a large number, and the frequency occurred, intensity and harmfulness are also increasing.These generations of subsiding, none does not destroy the original equilibrium state in karst area with engineering activity relevant.Karst ground subsidence has become the roadbed construction of current karst area and has faced very general, but insoluble engineering geological problems.

Karst area generally lacks soil and many stone, slags tap railway embankment using in most excavation cutting rock ballast and tunnel of adopting.It has been generally acknowledged that, relative soil property filler, the intensity that rock matter filler is higher, less distortion and good water permeability, is the good material of railway embankment using.If soil subgrade, easily intercept surface water circulation, cause ponding, ponding permeates downwards, is easy to cause karst ground subsidence.Although be provided with the culvert of one, the hundreds of rice in interval, still have some local ponding unavoidably.And the shortcoming that culvert has rigidity excessive, the easily impact of aggravation vibrating load, cause karst area surface collapse.

Although rock subgrade has plurality of advantages than soil subgrade, also there is shortcoming.Although rock subgrade can not cause trackside ponding, there is hole large like this, be easy to cause the soil matrix below roadbed to soak, shear resistance declines thereupon, and then disequilibrium is subsided.

Karst ground subsidence harm is huge, the measure of prevention of must taking the initiative.And the road structure of the loose types such as original soil subgrade, rock subgrade cannot meet the needs that karst area roadbed is built, the anti-road structure that collapses of a kind of ductility is proposed very necessary, still to have certain stability and anti-ability of collapsing when Collapse Pit appears in karst ground, at utmost ensure traffic safety.

Utility model content

The purpose of this utility model is to overcome the shortcoming existed in above-mentioned prior art, provides a kind of karst area ductility the anti-road structure that collapses, to improve road structure stability and the anti-ability of collapsing of ductility.。

For achieving the above object, the utility model by the following technical solutions: comprise cement-soil confining bed, cement-soil confining bed is coated with successively netted gabion structure, soil padding and continuous arch structure; And netted gabion structure inside is provided with cement-soil;

Described netted gabion structure comprises: reinforced gabion framework and be arranged at the reinforcing bar being divided into some regions in reinforced gabion framework.

For colligation is fixed between described reinforced gabion framework and reinforcing bar.

Described netted gabion structure is piled up by reinforced gabion stratification on cement-soil confining bed and is formed.

Described cement-soil comprises plantmix's rendzinas that dirt and water ratio are 1:6.

The utility model has following beneficial effect: prior art of comparing, and the utility model comprises cement-soil confining bed, cement-soil confining bed is coated with successively netted gabion structure, soil padding and continuous arch structure; And netted gabion structure inside is provided with cement-soil; Netted gabion structure comprises: reinforced gabion framework and be arranged at the reinforcing bar being divided into some regions in reinforced gabion framework; By the globality using netted gabion structure to substantially increase road structure.When ground occurs that diameter is less than the small-sized Collapse Pit of 1m, netted gabion structure is not had an impact; When the small-sized Collapse Pit of diameter 1 ~ 3m appears in ground, gabion structure can fill obstruction Karst corridor, and making to subside slowly stops.When there is slightly large Collapse Pit in ground, gabion structure occurs that fraction collapses, but because netted gabion structure is each other by reinforcing bar binding, thus there will not be large area to collapse, add the ability that continuous arch structure has again good maladjustment geology, still have that good stability support road structure is unlikely to collapse.Therefore, this device is applicable to spread and use.Finally obtain the anti-road structure that collapses of karst area ductility, it is short that the method lays the cycle, and it is convenient to lay, and lay simple, and cost is low.

Accompanying drawing explanation

Fig. 1 is the anti-roadbed schematic longitudinal section that collapses of a kind of karst area ductility.

Fig. 2 is reinforced gabion frame construction schematic diagram.

Detailed description of the invention

Below in conjunction with accompanying drawing, the utility model is described in further detail.

See Fig. 1-2, the utility model comprises the anti-road structure that collapses of a kind of karst area ductility, it is characterized in that: comprise cement-soil confining bed 4, cement-soil confining bed 4 is coated with successively netted gabion structure 3, soil padding 2 and continuous arch structure 1; And netted gabion structure 3 inside is provided with cement-soil; Netted gabion structure 3 comprises: reinforced gabion framework 5 and be arranged at the reinforcing bar 6 being divided into some regions in reinforced gabion framework 5.For colligation is fixed between reinforced gabion framework 5 and reinforcing bar 6.Netted gabion structure 3 is piled up by reinforced gabion stratification on cement-soil confining bed 4 and is formed.Cement-soil comprises plantmix's rendzinas, and in plantmix's rendzinas, the ratio of dirt and water is 1:6.

Construction method of the present utility model, comprises the following steps:

Step 1) pave setting-out earth real formation cement-soil confining bed 4 after excavating original ground loose soil bed 0.4m; Step 1) in, the preparation method of cement-soil waters to mix and stir with the lime-soil ratio of 1:6 to obtain cement-soil, step 1) in, the every thickness 30 ~ 40cm of cement-soil confining bed 4, after compacting, every layer thickness is 15 ~ 20cm, total laying depth 0.4m, and preserving period is 7 days;

Step 2) on cement-soil confining bed 4, use many placing of reinforcements gabion to pile up the netted gabion structure 3 of stratification; Step 2) the middle high 0.5m of reinforced gabion framework 5, length and width are 2m, and relying on reinforcing bar 6 to carry out colligation each other becomes overall, and reinforced gabion lower portion, with geotechnological woven bag, is equipped with earth and stone material with the soil-rock ratio of 1:4 in woven bag;

Step 3) pave the smooth rear acquisition soil padding 2 of grogs compacting on netted gabion structure 3; Step 3) in, soil padding 2 paves the continuous arcuation in sagitta 1 ~ 1.2m, sagitta 0.6m after compacting, span of arch 5m, the wide 0.4m of arch springing;

Step 4) described in be joints cement concrete on continuous arcuation soil padding 2, make it to become flat-shaped in lower arch, form continuous arch structure 1, finally obtain the anti-road structure that collapses of karst area ductility.

Concrete construction method is as follows:

First excavate original ground loose soil bed, form the soil box that 0.4m is high.Choose the cement of 32.5 grades, and with the lime-soil ratio of 1:6, compound is mixed and stirred in center batching plant.After the compound mixed and stirred is transported to scene, pave uniformly in soil box by the thickness layering of 30 ~ 40cm with land leveller or paver.Tentatively strike off and integer with land leveller after paving.First first static pressure 1 ~ 2 time within the scope of overall with after integer, be then compacted to the requirement of regulation with vibratory roller, after compacting, every layer thickness is 15 ~ 20cm.Every layer all by above-mentioned method compacting, should make total compacted depth be 0.4m, and just in time fills up soil box.Should health be carried out after compacting completes, all should keep wet in the whole process of health, except sprinkling truck, answer close traffic health 7 days.

Netted gabion structure is piled up on the cement-soil confining bed that health is good by many placing of reinforcements gabion to form.Wherein gabion adopts rectangular framework, and framework height is 0.5m, and length and width are 2m, carry out colligation, make it into as a whole between adjacent gabion with steel wire.Gabions all so just becomes a large entirety.In the inside of gabion, therein attached with geotechnological woven bag, use the earth and stone material of the soil-rock ratio of 1:4 to be contained in geotechnological woven bag simultaneously.

Soil padding making is on netted gabion structure.Soil padding material should adopt good, the scleroid medium sand of grain composition, coarse sand, gravelly sand, rubble, aggregate chips or other Industry Waste pellets.In lacking, the area of coarse sand and gravelly sand, also can adopt fine sand, but rubble or the cobble of some will be mixed simultaneously.Sand material used, must not contain the foreign organic matter such as grass roots, rubbish, mud content is no more than 3%, and rubble or cobble the largest particles should not be greater than 50mm.After the grogs that chooses is pulverized under optimum moisture content mix, with transporter, the earth material mixed is transported to construction plant, will ensures that in Transportation Engineering the moisture of compound does not evaporate as far as possible.Before paving, should ensure the neatly smooth of gabion structure surface, will prevent earth material from emanating paving in engineering, and the moment notices that the elevation of each some position makes it meet the requirement of design, making to pave forms the continuous arcuation soil padding that sagitta is 1 ~ 1.2m.Adopt road roller to roll subsequently, soil padding is rolled into sagitta 0.6m the most at last, span of arch 5m, the continuous arcuation soil padding of arch springing height 0.4m, will note carrying out watering health, make it reach corresponding intensity after having rolled.

Continuous arch structure is casting cement concrete on continuous arcuation soil padding, makes it to become flat structure in the lower arch based on pressurized.Cement concrete can adopt C40, C50, C60 etc., removing and the leveling work of soil padding surface irregularities should be carried out before paving, then pave cement concrete to design elevation, then propose slurry leveling with instruments such as vane type, disc type finisher or floating rules, and use vacuum hydroextractor to dewater.Health 28d, makes the moisture in concrete fully react and evaporate, and reduces shrinkage.

Claims (3)

1. the anti-road structure that collapses of karst area ductility, it is characterized in that: comprise cement-soil confining bed (4), cement-soil confining bed (4) is coated with successively netted gabion structure (3), soil padding (2) and continuous arch structure (1); And netted gabion structure (3) inside is provided with cement-soil;

Described netted gabion structure (3) comprising: reinforced gabion framework (5) and be arranged at the reinforcing bar (6) being divided into some regions in reinforced gabion framework (5).

2. the anti-road structure that collapses of a kind of karst area according to claim 1 ductility, is characterized in that: for colligation is fixed between described reinforced gabion framework (5) and reinforcing bar (6).

3. the anti-road structure that collapses of a kind of karst area according to claim 1 ductility, is characterized in that: described netted gabion structure (3) is piled up by reinforced gabion stratification on cement-soil confining bed (4) and formed.