CN208151798U - A kind of seasonal frozen soil region high-speed rail roadbed water cut infiltration ditch system - Google Patents

Abstract

The utility model relates to a kind of seasonal frozen soil region high-speed rail roadbed water cut infiltration ditch systems, from top to bottom include trapezoidal open drain and blind drain；The trapezoidal open drain includes the conditioned soil of trapezoidal open drain and its underpart；The blind drain includes the double-wall corrugated pipe of the non-fine concrete plates of ditch two sides, the sewer pedestal of bottom, the insulating layer at top, the obturator at middle part and sewer base position.The utility model takes full advantage of without anti-geotextiles, non-fine concrete plate, the permeable reverse filter effect for cleaning rubble, soil body moisture more than high-speed railway subgrade frost heave line can be penetrated into sewer to greatest extent and be discharged from subgrade soil, realize Earth Surface Atmosphere precipitation again simultaneously effectively collects discharge, greatly reduce subgrade soil moisture, the most important condition for causing roadbed that frost heave occurs is eliminated, i.e.,：The influence of water can effectively prevent deep seasonal frozen ground area high-speed rail roadbed and frost heave occur, and the application effect in Lanzhou-Xinjiang high-speed rail is significant.

Description

A kind of seasonal frozen soil region high-speed rail roadbed water cut infiltration ditch system

Technical field

The utility model relates to high speed railway construction field of engineering technology, and in particular to a kind of high railway in seasonal frozen soil region Base water cut infiltration ditch system.

Background technique

The stability of high-speed railway roadbed engineering proposes new requirements at the higher level, and subgrade engineering is high-speed iron whether stabilization Can road realize high speed, steady, safe operation key.It is different from previous common railway subgrade engineering and focuses on Intensity Design, it is high For fast railway subgrade works under the premise of meeting intensity requirement, Deformation control has been raised to extremely important position.To high speed Railway impact deformation the most serious is roadbed vertical deformation, and one kind showing as subgrade settlement, and another kind shows as road bed Lifting.In severe cold area, periodic temperature change, the natural conditions such as comprehensive rain, snow will form a kind of special ground class Type-Seasonal analysis.Volume occurs swollen when the most significant feature of frost zone and its in winter temperature are located at 0 DEG C or less Swollen, this characteristic most directly shows as winter road bed on subgrade engineering and is lifted, i.e.,：Frost heave causes railway rail level Irregularity, and then influence train traffic safety.Therefore, in the design of severe cold area high-speed railway subgrade, the design of roadbed anti-freeze expansion is aobvious It obtains particularly important.

The frost heave of the soil body is since outside air temperature reaches solidification point hereinafter, part water build-ups ice and leads to soil in soil body hole Volume expansion increases.Therefore, the moisture content in soil plays decisive role in frost heave.Under field conditions (factors), the benefit of moisture To including mainly two sources, first is that the recirculation water in Atmospheric precipitation and drainage procedure, Atmospheric precipitation influence it is maximum be Before subzero temperature arrives, i.e., the precipitation before freezing soil.The other is underground water, key is distance from groundwater with a distance from earth's surface, In a certain range, level of ground water is higher, and the frost heave of the soil body is bigger.Due to there is endlessly water supply in the soil body, significantly Increase the frost heave of soil.So the moisture in drainage roadbed, reduces the level of ground water of roadbed lower part, is with effectivelying prevent severe cold The important measure of area's high-speed railway subgrade generation frost heave.

Summary of the invention

The purpose of the utility model is to provide a kind of seasonal frozen soil region high-speed rail roadbed water cut infiltration ditch systems, can effectively reduce Roadbed lower part soil body moisture has achieved the purpose that prevent the frost failure of roadbed from occurring, and maintains cold area's high-speed railway subgrade Long-time stability.

Technical solution used by the utility model is：

A kind of seasonal frozen soil region high-speed rail roadbed water cut infiltration ditch system, it is characterised in that：

It from top to bottom include trapezoidal open drain and blind drain；

The trapezoidal open drain includes the conditioned soil of trapezoidal open drain and its underpart；

The blind drain includes the non-fine concrete plate, the sewer pedestal of bottom, the insulating layer at top, middle part of ditch two sides Obturator and sewer base position double-wall corrugated pipe.

Non-woven geotextile is provided with outside non-fine concrete plate.

Insulating layer includes upper layer and lower layer protective layer and intermediate insulation board, and protective layer is medium-sand seam.

Trapezoidal open drain is concrete prefabricated structure or cast-in-place structural, or is mortar flag stone masonry construction.

Sewer pedestal is concrete cast-in-situ structure, and the non-fine concrete plate of two sides is precast construction.

Obturator is to clean rubble filling.

2/3rds range aperture of double-wall corrugated pipe top, lower part not aperture are external to wrap up one layer of non-woven geotextile.

The utility model has the following advantages that：

1. the utility model takes full advantage of without anti-geotextiles, non-fine concrete plate, the permeable anti-filter work for cleaning rubble With soil body moisture more than high-speed railway subgrade frost heave line can be penetrated into sewer to greatest extent and arranged from subgrade soil Out, while again realize Earth Surface Atmosphere precipitation effectively collects discharge, greatly reduces subgrade soil moisture, eliminates and cause road The most important condition of frost heave occurs for base, i.e.,：The influence of water can effectively prevent deep seasonal frozen ground area high-speed rail roadbed and freeze Swollen, the application effect in Lanzhou-Xinjiang high-speed rail is significant.

2. water cut infiltration ditch uses inverted trapezoidal form of fracture, furrow bank is laid with non-fine concrete plate.It is non-fine concrete plate, trapezoidal Concrete guiding gutter is all made of prefabrication system.Convenient and quick construction, relative inexpensiveness, operational procedure is simple, to environmental perturbation It is small.

3. the utility model may be directly applied to severe cold area high-speed railway embankment section, in existing sewer and new anatonosis It can lay and be transformed in ditch, not influence the normal operation of railway.

Detailed description of the invention

Fig. 1 is the utility model schematic cross-sectional view.

Fig. 2 is double-wall corrugated pipe cross-sectional view with holes.

Fig. 3 is utility model works schematic diagram.

In figure, 1- non-fine concrete plate, 2- non-woven geotextile, 3- sewer pedestal, 4- double-wall corrugated pipe, 5- obturator, 6- Protective layer, 7- insulation board, the trapezoidal open drain 8-, 9- conditioned soil, 10- high-speed rail roadbed.

Specific embodiment

The utility model is described in detail With reference to embodiment.

The utility model relates to a kind of seasonal frozen soil region high-speed rail roadbed water cut infiltration ditch system, by the ground of water cut infiltration ditch Sufficiently combined with underdrainage system, on the one hand utilize sewer top the trapezoidal gutter of concrete, by near embankment slope foot by The water that the earth's surfaces such as natural precipitation, snowfall confluence generates drains into inspection shaft and is discharged in time, effectively reduces Atmospheric precipitation and satisfies the need The supply of base soil body moisture；On the other hand, by moisture more than roadbed lower part body frost heaving line, by non-woven geotextile, without sand Concrete slab and clean rubble penetrate into sewer, are drained to inspection in time by the Double-wall PVC bellows with holes of sewer bottom It looks into interior, so that subgrade soil be discharged, greatly reduces the moisture in the soil body；Simultaneously during seepage action of ground water, nonwoven soil Work cloth again separates silt in the soil body etc., to effectively prevent the sedimentation of road bed caused by soil erosion.Do not influencing roadbed Under the premise of sedimentation, by inspection shaft by roadbed lower part and slope foot periphery easily cause frost heave underground water and surface water and When be discharged, therefore be a kind of effective underground and aboveground drainage pattern in embankment section, especially to severe cold area high-speed railway road Base has apparent anti-freeze expansion effect.

Specific structure is：

It from top to bottom include trapezoidal open drain and blind drain；The trapezoidal open drain includes trapezoidal open drain 8 With the conditioned soil 9 of its underpart；The blind drain includes the non-fine concrete plate 1 of ditch two sides, the sewer pedestal 3 of bottom, top Insulating layer, middle part obturator 5 and the double-wall corrugated pipe 4 at sewer pedestal 3, nonwoven is provided with outside non-fine concrete plate 1 Geotextiles 2, insulating layer include upper layer and lower layer protective layer 6 and intermediate XPS insulation board 7, and protective layer 6 is medium-sand seam.

Trapezoidal open drain 8 is concrete prefabricated structure or cast-in-place structural, or is mortar flag stone masonry construction.Sewer pedestal 3 be concrete cast-in-situ structure, and the non-fine concrete plate 1 of two sides is precast construction.Obturator 5 is to clean rubble filling.

4 top of double-wall corrugated pipe, 2/3rds range aperture, lower part not aperture are external to wrap up one layer of non-woven geotextile 2.

The construction method of structure is：

Step 1：Sewer earth excavation is carried out at high-speed rail roadbed slope foot or lateral sulcus, sewer sidewall slopes are than 1:0.25~1: 0.5, depth about 2.0m ~ 3.0m guarantee sewer bottom lower than frost heave line about 25cm or so.

Step 2：After the completion of manually repairing hole, sewer pedestal 3 is poured in sewer bottom, prefabricated nothing is arranged in water cut infiltration ditch two sides Non-woven geotextile 2 is wrapped up in sand concrete plate 1, plate outside, and quality is not less than 450g/m.

Step 3：1 Double-wall PVC bellows 4 with holes, ripple pipe diameter are laid in 3 or more central location of sewer pedestal It is determined according to flow.

Step 4：Rubble is cleaned by filling in sewer（Obturator 5）With non-woven geotextile bedding to ditch top surface 20cm, so It is laid with 20cm thickness medium coarse sand protective layer 6 afterwards, point two layers of laying, coarse sand middle part is laid with one layer of heat preservation plate 7, and plate thickness calculates as needed It determines, thermal coefficient is lower than 0.027W/m DEG C；Insulation board 7 generally using extrusion moulding type polystyrene add other supplementary materials with Polymerization, extrusion forming.

Step 5：Sewer underdrain top is laid with the trapezoidal open drain 8 of prefabricated concrete, and improvement is then backfilled around it Soil 9 guarantees to be slightly below horizontal line at slope foot at the top of dovetail groove, so that surface water collects.

Step 6：Inspection shaft at one is laid every 50m on roadbed longitudinal direction, it is timely to collect the water collected in sewer Discharge.

As shown in Fig. 2, the draining of water cut infiltration ditch system mainly passes through ground and subdrainage two ways：Sewer top The trapezoidal gutter of concrete belongs to Ming Gou, by by near embankment slope foot by natural precipitation, drop（Product）The earth's surfaces such as snow confluence generates Water be pooled to gutter, and then drain into inspection shaft discharge, can effectively reduce supply of the Atmospheric precipitation to roadbed soil body moisture, Water recharging is weakened from source；On the other hand, by moisture more than roadbed lower part body frost heaving line, pass through nonwoven geotechnique Cloth, non-fine concrete plate and clean rubble penetrate into sewer, are drained in time using the double-wall corrugated pipe with holes of sewer bottom In inspection shaft, subgrade soil is discharged, effectively reduces the underground water content in subgrade soil；Simultaneously in seepage action of ground water process In, geotextiles, non-fine concrete plate again separate silt driven seepage through soil mass during etc. in outside sewer, to effectively prevent Road bed caused by soil erosion settles, and then under the premise of not influencing subgrade settlement, by inspection shaft by roadbed lower part And slope foot periphery easily causes the underground water of frost heave and Atmospheric precipitation is discharged in time, is a kind of effective underground in embankment section With ground drainage pattern, especially there is apparent antifreezing expansion effect to severe cold area high-speed railway.

The content of the utility model is not limited to cited by embodiment, and those of ordinary skill in the art are practical new by reading this Type specification and to any equivalent transformation that technical solutions of the utility model are taken, be the claim institute of the utility model Cover.

Claims (7)

1. a kind of seasonal frozen soil region high-speed rail roadbed water cut infiltration ditch system, it is characterised in that：

It from top to bottom include trapezoidal open drain and blind drain；

The trapezoidal open drain includes trapezoidal open drain（8）With the conditioned soil of its underpart（9）；

The blind drain includes the non-fine concrete plate of ditch two sides（1）, bottom sewer pedestal（3）, top insulating layer, in The obturator in portion（5）And sewer pedestal（3）The double-wall corrugated pipe at place（4）.

2. a kind of seasonal frozen soil region high-speed rail roadbed water cut infiltration ditch system according to claim 1, it is characterised in that：

Non-fine concrete plate（1）It is provided with non-woven geotextile outside（2）.

3. a kind of seasonal frozen soil region high-speed rail roadbed water cut infiltration ditch system according to claim 1, it is characterised in that：

Insulating layer includes upper layer and lower layer protective layer（6）With intermediate insulation board（7）, protective layer（6）For medium-sand seam.

4. a kind of seasonal frozen soil region high-speed rail roadbed water cut infiltration ditch system according to claim 1, it is characterised in that：

Trapezoidal open drain（8）It for concrete prefabricated structure or cast-in-place structural, or is mortar flag stone masonry construction.

5. a kind of seasonal frozen soil region high-speed rail roadbed water cut infiltration ditch system according to claim 1, it is characterised in that：

Sewer pedestal（3）For concrete cast-in-situ structure, the non-fine concrete plate of two sides（1）For precast construction.

6. a kind of seasonal frozen soil region high-speed rail roadbed water cut infiltration ditch system according to claim 1, it is characterised in that：

Obturator（5）To clean rubble filling.

7. a kind of seasonal frozen soil region high-speed rail roadbed water cut infiltration ditch system according to claim 1, it is characterised in that：

Double-wall corrugated pipe（4）2/3rds range aperture of top, lower part not aperture are external to wrap up one layer of non-woven geotextile（2）.