CN203546514U - Totally enclosed drainage prevention foundation bed structure of railway expansive soil cutting - Google Patents
Totally enclosed drainage prevention foundation bed structure of railway expansive soil cutting Download PDFInfo
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- CN203546514U CN203546514U CN201320538956.8U CN201320538956U CN203546514U CN 203546514 U CN203546514 U CN 203546514U CN 201320538956 U CN201320538956 U CN 201320538956U CN 203546514 U CN203546514 U CN 203546514U
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- 239000002689 soil Substances 0.000 title claims abstract description 57
- 238000005520 cutting process Methods 0.000 title claims abstract description 20
- 230000002265 prevention Effects 0.000 title abstract 4
- 239000010410 layer Substances 0.000 claims abstract description 38
- 239000002344 surface layer Substances 0.000 claims abstract description 8
- 238000004078 waterproofing Methods 0.000 claims description 30
- 239000004576 sand Substances 0.000 claims description 5
- 239000000945 filler Substances 0.000 claims description 4
- 230000008961 swelling Effects 0.000 claims description 4
- 238000010276 construction Methods 0.000 abstract description 14
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- 239000002352 surface water Substances 0.000 description 2
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- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
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Abstract
The utility model relates to a totally enclosed drainage prevention foundation bed structure of a railway expansive soil cutting, wherein the riding comfort of a road line and the power stability of the foundation bed are ensured by using a passage for thoroughly isolating external moisture to permeate in the foundation bed, and the replaced filling thickness of the foundation bed is effectively reduced, and the construction cost is reduced. The totally enclosed drainage prevention foundation bed structure comprises an expansion-reduction layer (11), a waterproof layer (12), a drainage layer (13) and a foundation bed surface layer (14) which are arranged on an expansive soil foundation (10), and a side ditch (20) and a blind ditch (22) which are arranged outside two transverse sides of the expansion-reduction layer (11). The waterproof layer (12) is a semi-rigidity waterproof structure layer, wherein the modulus of elasticity is 0.75-1.5 GPa, the dynamic modulus of elasticity Evd is not smaller than 65 MPa, and the impermeability coefficient is smaller than 10<-10> m/s; the waterproof layer (12) is transversely paved in a full section manner along the surface of the expansion-reduction layer (11), and a totally enclosed drainage prevention system is formed with the side ditch (20), the blind ditch (22) and waterproof side walls (21) arranged on the two sides of the blind ditch (22).
Description
Technical field
The utility model relates to railway cutting, particularly the totally-enclosed anti-draining foundation bed structure of the railway cutting under a kind of expansive soil, expansive rock geological conditions.
Background technology
At present, according to the requirement of < < railway Special Subgrade Design standard > > (TB10035-2006), expansive soil (rock) district railway cutting bedding processing method is: (1) " surface layer of subgrade bed should all change and fill out the material that meets corresponding classification of rail standard-required "; (2) " bottom layer of subgrade should be taked to change and fill out or soil improvement measure.Weak, middle expansive soils (rock) (rock) are processed to thickness, and speed per hour 200km and above railway should not be less than 1.0m, and other I, II level railway should not be less than 0.5m, strong swelling soil (rock) processing thickness should be greater than weather acutely affects layer, and should not be less than the bottom layer of subgrade degree of depth ", (3) according to 200～250 kilometers of Line for Passenger Transportation design temporary provisions > > (iron construction [(2005) No. 140]) of the newly-built speed per hour of < < and < < Railway Design standard > > (trying) requirement (TB10621-2009), expansive soil below bedding (rock) should take to seal waterproof, draining or measures of foundation treatment, on railway, conventionally adopt now full section laying composite geo-membrane or composite water drain-proof plate to carry out bedding sealing waterproof and draining.
The subject matter of carrying out the anti-draining processing of bedding existence according to composite geo-membrane conventional on present railway or composite water drain-proof plate is: (1) composite earthwork material adopts overlap joint or welding, many and the welding quality of constuction joint is difficult to control, cause constuction joint to be difficult to sealing, easily become surface water and infiltrate a little; (2) contact net basic is executed man-hour requirement through the waterproofing course of composite geo-membrane or drainable waterproofing plate formation, inevitably can cause the composite geo-membrane of contact net basic periphery or composite water drain-proof plate damaged, causes the waterproof failure of contact net basic periphery; (3) because the distribution of Train induced load on bedding horizontal plane is that inhomogeneous (single line is single saddle shaped, two-wire is two saddle shapeds), increase along with the circuit service time, bedding can produce inhomogeneous deformation gradually, form railway ballast capsule, and composite geo-membrane or drainable waterproofing plate is flexible material, opposing vertical deformation ability, along with the distortion of bedding, be out of shape, cause bedding draining horizontal wall inscription lost efficacy and then affected bedding impeded drainage or Zang Shui, make bedding produce the disease of rising soil; (4) surface water enters to be seeped into after expansive soil (rock) ground through composite geo-membrane or composite water drain-proof plate constuction joint, contact net basic periphery splash guard damage location, expansive soil (rock) water content increases, produce dilatancy, cause the diseases such as bedding bulging, lateral sulcus abutment wall destruction, lateral sulcus bottom of trench protuberance, these diseases have reduced ride comfort and the bedding kinetic stability of circuit, and serious meeting affects the steady safe operation of train; (5) due to the atmosphere of expansive soil (rock), acutely to affect the degree of depth larger, according to current specifications, requires bottom layer of subgrade to take to change to fill out or soil improvement measure is processed, and soil improvement amount and excavation change that the amount of filling out is large, and the side of abandoning is many, both uneconomical, also not environmental protection.
Utility model content
Technical problem to be solved in the utility model is to provide the totally-enclosed anti-draining foundation bed structure of a kind of railway expansive soil cutting, thoroughly to cut off extraneous moisture, infiltrate the passage of bedding, guarantee the stability of ride comfort and the bedding power of circuit, and effectively reduce bedding and change and fill out thickness, reduce construction costs.
It is as follows that the utility model solves the technical scheme that its technical problem adopts:
The totally-enclosed anti-draining foundation bed structure of railway expansive soil cutting of the present utility model, be included on expansive soil foundation and from bottom to top set gradually and subtract swollen layer, waterproofing course, drainage blanket, surface layer of subgrade bed, and lateral sulcus and french drain are set subtracting swollen layer both sides, it is characterized in that: described waterproofing course is semi-rigid Waterproof structural course, its modulus of elasticity is 0.75GPa～1.5GPa, Dynamic Elastic Module E
vdbe not less than 65MPa, impervious coefficient <10
-10m/s; Waterproofing course is along subtracting the laterally full section making in swollen layer surface, forms totally-enclosed anti-drainage system with lateral sulcus, french drain and the waterproof sidewall that is arranged at french drain both sides.
Describedly subtract swollen layer and adopt A, B group filler to fill, corresponding to the thickness of different inflation level expansive soil foundations, be respectively: weak expansive soil section is not less than 0.5m, and middle expansive soils section is not less than 0.8m, and strong swelling soil section is not less than 1.0m.
The beneficial effects of the utility model are that waterproofing course adopts the disposable decking and rolling moulding of mechanization, has solved the leakage problems that the constuction joint existing in the anti-drainage measure of conventional flexible geosynthetics is many, contact seam position with contact net upright post basic; Waterproofing course rigidity is larger, its modulus of elasticity reaches 0.75GPa～1.5GPa, and Train induced load is had to good uniform effect, thereby has reduced the inhomogeneous deformation of bedding, when keeping bedding transverse drainage horizontal wall inscription, reduce that bedding produces railway ballast capsule or the Defect of Foundation Bed of Express such as rise soil; Waterproofing course and lateral sulcus furrow bank wing plate overlap joint, have good bonding strength and sealing, thereby avoid the leakage problems of lateral sulcus and waterproofing course contact position; For weak, in, the expansive soil foundation of strong three kinds of different inflation level, determined respectively and reasonably subtracted swollen layer thickness, eliminate expansive soil foundation and affected by amblent air temperature and the impact on Track regularity of the swell-shrinking deformation that produces; Waterproofing course has some improvement to the dynamic response tool of bedding, can reduce bedding and change and fill out thickness, reduces construction costs.
Accompanying drawing explanation
This manual comprises following three width accompanying drawings:
Fig. 1 is the profile of the totally-enclosed anti-draining foundation bed structure of the utility model railway expansive soil cutting;
Fig. 2 is the enlarged diagram of A part in Fig. 1;
Fig. 3 is the sectional drawing of the totally-enclosed anti-draining foundation bed structure Waterproof structural course of the utility model railway expansive soil cutting processing scheme when constuction joint appears in moat bearing of trend by the way.
Member shown in figure, toponym and corresponding mark: expansive soil foundation 10, subtract swollen layer 11, waterproofing course 12, construction waterproof layer 12a, new construction waterproof layer 12b, drainage blanket 13, surface layer of subgrade bed 14, railway ballast layer 15, waterproof coating 16; Lateral sulcus 20, wing plate 20a, waterproof sidewall 21, french drain 22, gutter 22a, sandy gravel 22b.
The specific embodiment
Below in conjunction with drawings and Examples, the utility model is further illustrated.
With reference to Fig. 1, the totally-enclosed anti-draining foundation bed structure of railway expansive soil cutting of the present utility model, be included on expansive soil foundation 10 and subtract swollen layer 11, waterproofing course 12, drainage blanket 13, surface layer of subgrade bed 14 by what set gradually on lower, and be arranged on lateral sulcus 20 and the french drain 22 subtracting outside swollen layer 11 both lateral sides.Described waterproofing course 12 is semi-rigid Waterproof structural course, and its modulus of elasticity is 0.75GPa～1.5GPa, Dynamic Elastic Module E
vdbe not less than 65MPa, impervious coefficient <10
-10m/s, waterproofing course 12 is along subtracting the swollen layer 11 laterally full section making in surface, forms totally-enclosed anti-drainage system with lateral sulcus 20, french drain 22 and the waterproof sidewall 21 that is arranged at french drain 22 both sides.Waterproofing course 12 adopts the disposable decking and rolling moulding of mechanization, solved the leakage problems that the constuction joint existing in the anti-drainage measure of conventional flexible geosynthetics is many, contact seam position with contact net upright post basic, thoroughly cut off the passage that extraneous moisture infiltrates bedding, guarantee ride comfort and the bedding kinetic stability of circuit.Because waterproofing course 12 rigidity are larger, its modulus of elasticity reaches 0.75GPa～1.5GPa, and Train induced load is had to certain uniform effect, thereby reduces the inhomogeneous deformation of bedding, when keeping bedding transverse drainage horizontal wall inscription, reduce that bedding produces railway ballast capsule or the Defect of Foundation Bed of Express such as rise soil.
The described swollen layer 11 that subtracts adopts A, B group fillers to fill, for eliminating the impact on Track regularity of swell-shrinking deformation that expansive soil foundation affects by amblent air temperature to produce, thickness corresponding to different inflation level expansive soil foundations is respectively: weak expansive soil section is not less than 0.5m, middle expansive soils section is not less than 0.8m, and strong swelling soil section is not less than 1.0m.
With reference to Fig. 2, for avoiding lateral sulcus 20 and waterproofing course 12 contact positions to occur seepage, the inside top of described lateral sulcus 20 has the wing plate 20a of inside horizontal expansion, the end face of wing plate 20a with subtract swollen layer 11 surface and be positioned in same level, and form overlap joint with waterproofing course 12 lateral ends, there is good bonding strength and sealing.Described french drain 22 bottoms are positioned at the following 20cm, interior gutter 22a the heap sand cobble 22b of arranging of french drain 22 of being not less than in expansive soil foundation 10 surfaces.Described drainage blanket 13 adopts medium coarse sand to lay conventionally, and its thickness is generally 5cm.With reference to Fig. 1, described waterproofing course 12, drainage blanket 13 and subtract swollen layer 11 surface and have 3～4% transverse drainage gradients, so that drainage blanket 13 has better drainage effect.
With reference to Fig. 1, the construction method of the totally-enclosed anti-draining foundation bed structure of the utility model railway expansive soil cutting is as follows:
By design drawing, expansive soil cutting bedding is excavated to the design elevation of expansive soil foundation 10, whether detect expansive soil foundation 10 bearing capacities can meet the demands, when when expansive soil foundation or after ground is processed, bearing capacity meets the demands, at expansive soil foundation 10 higher slices, fill and subtract swollen layer 11, subtract swollen floor filling process and compacting criteria and see that 200～250 kilometers of Lines for Passenger Transportation of the newly-built speed per hour of < < design temporary provisions > > (iron construction [(2005) No. 140]) and < < Railway Design standard > > (trying) (TB10621-2009), after subtracting swollen layer 11 and having filled, utilize excavator to excavate waterproof sidewall 21 downwards along lateral sulcus 20 positions and french drain 22 arranges groove, with reference to Fig. 2, during french drain 22 construction, first at bottom land, lay part sandy gravel 22b, then place the gutter 22a(that is wrapped with permeable geotextiles and conventionally adopt perforate pvc pipe), and guarantee its drainage grade, then outside gutter 22a cover sand cobble 22b, after blind ditch construction finishes, with concrete casting building waterproofing sidewall 21, building is highly lateral sulcus 20 bottom surface design elevations, waterproof sidewall 21 intensity reach after related request, lay lateral sulcus steel mesh reinforcement (wing plate 20a arrangement of reinforcement and lateral sulcus wall integrated connection), formwork erection monobloc cast lateral sulcus 20 and wing plate 20a, subtracting the full section laying of swollen layer 11 end face waterproofing course 12, its surface should arrange the transverse drainage gradient, and carries out maintenance, when waterproofing course 12 intensity, rigidity reach detection index, lay drainage blanket 13, finally fill surface layer of subgrade bed 14, surface layer of subgrade bed adopts graded broken stone filling technology, and filler requirement and compacting criteria are referring to < < Railway Design standard > >.
Fig. 3 shows the treatment measures of waterproofing course 12 constuction joints, being waterproofing course executes man-hour requirement constuction joint is carried out to emphasis processing along discontinuous on circuit bearing of trend, upper once construction start before, first construction waterproof layer 12a constuction joint section is whittled into inclined-plane, dabbing, watering, then the new construction waterproof layer of decking and rolling 12b smears waterproof coating after construction finishes on constuction joint.
Some principles of the above totally-enclosed anti-draining foundation bed structure of the utility model railway expansive soil cutting that just explains through diagrams, be not the utility model to be confined to shown in and in described concrete structure and the scope of application, therefore the corresponding modify being likely utilized every and equivalent, all belong to the scope of the claims that the utility model is applied for.
Claims (6)
1. the totally-enclosed anti-draining foundation bed structure of railway expansive soil cutting, be included in that expansive soil foundation (10) is upper subtracts swollen layer (11), waterproofing course (12), drainage blanket (13), surface layer of subgrade bed (14) by what set gradually on lower, and be arranged on lateral sulcus (20) and the french drain (22) subtracting outside swollen layer (11) both lateral sides, it is characterized in that: described waterproofing course (12) is semi-rigid Waterproof structural course, its modulus of elasticity is 0.75GPa～1.5GPa, Dynamic Elastic Module E
vdbe not less than 65MPa, impervious coefficient <10
-10m/s; Waterproofing course (12) is along subtracting the laterally full section making in swollen layer (11) surface, forms totally-enclosed anti-drainage system with lateral sulcus (20), french drain (22) and the waterproof sidewall (21) that is arranged at french drain (22) both sides.
2. the totally-enclosed anti-draining foundation bed structure of railway expansive soil cutting as claimed in claim 1, it is characterized in that: described in subtract swollen layer (11) and adopt A, B group filler to fill, thickness corresponding to different inflation level expansive soil foundations is respectively: weak expansive soil section is not less than 0.5m, middle expansive soils section is not less than 0.8m, and strong swelling soil section is not less than 1.0m.
3. the totally-enclosed anti-draining foundation bed structure of railway expansive soil cutting as claimed in claim 1, it is characterized in that: the inside top of described lateral sulcus (20) has the wing plate (20a) of inside horizontal expansion, the end face of wing plate (20a) with subtract swollen layer (11) surface and be positioned in same level, and form overlap joint with waterproofing course (12) lateral ends.
4. the totally-enclosed anti-draining foundation bed structure of railway expansive soil cutting as claimed in claim 1, it is characterized in that: described french drain (22) bottom is not less than 20cm below being positioned at expansive soil foundation (10) surface, and gutter (22a) heap sand cobble (22b) are set in french drain (22).
5. the totally-enclosed anti-draining foundation bed structure of railway expansive soil cutting as claimed in claim 1, is characterized in that: described drainage blanket (13) adopts medium coarse sand to lay, and its thickness is 5cm.
6. the totally-enclosed anti-draining foundation bed structure of railway expansive soil cutting as claimed in claim 1, is characterized in that: described waterproofing course (12), drainage blanket (13) and subtract swollen layer (11) surface and have 3～4% transverse drainage gradients.
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| CN201320538956.8U CN203546514U (en) | 2013-08-31 | 2013-08-31 | Totally enclosed drainage prevention foundation bed structure of railway expansive soil cutting |
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| CN201320538956.8U CN203546514U (en) | 2013-08-31 | 2013-08-31 | Totally enclosed drainage prevention foundation bed structure of railway expansive soil cutting |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107447597A (en) * | 2017-07-25 | 2017-12-08 | 中铁二院工程集团有限责任公司 | A kind of non-fragment orbit railway expensive soil cutting structure and construction method |
| CN109235475A (en) * | 2018-09-10 | 2019-01-18 | 中铁二院工程集团有限责任公司 | A kind of high-speed railway cutting subdrainage educates the construction method of ditch |
| CN111304969A (en) * | 2020-03-31 | 2020-06-19 | 中铁二院工程集团有限责任公司 | Anti-bulging structure of ballastless track tramcar on strongly expansive soil or expansive rock section |
| CN111424469A (en) * | 2019-11-19 | 2020-07-17 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Waterproof structure in ballastless track of roadbed, construction method and application |
| CN111424481A (en) * | 2020-03-10 | 2020-07-17 | 西南交通大学 | Expansive soil cutting structure and construction method thereof |
| KR102175107B1 (en) * | 2019-11-27 | 2020-11-05 | 주식회사 대한콘설탄트 | Construction method of structure for preventing differential settlement and pushed of concrete orbit |
| CN113931025A (en) * | 2021-12-01 | 2022-01-14 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Three-dimensional drainage system and construction method thereof |
| CN114934407A (en) * | 2022-05-11 | 2022-08-23 | 东方雨虹智能装备有限责任公司 | Construction method for waterproof engineering of high-speed rail |
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2013
- 2013-08-31 CN CN201320538956.8U patent/CN203546514U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107447597A (en) * | 2017-07-25 | 2017-12-08 | 中铁二院工程集团有限责任公司 | A kind of non-fragment orbit railway expensive soil cutting structure and construction method |
| CN109235475A (en) * | 2018-09-10 | 2019-01-18 | 中铁二院工程集团有限责任公司 | A kind of high-speed railway cutting subdrainage educates the construction method of ditch |
| CN109235475B (en) * | 2018-09-10 | 2024-03-22 | 中铁二院工程集团有限责任公司 | Construction method of underground drainage blind ditch of high-speed railway cutting |
| CN111424469A (en) * | 2019-11-19 | 2020-07-17 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Waterproof structure in ballastless track of roadbed, construction method and application |
| KR102175107B1 (en) * | 2019-11-27 | 2020-11-05 | 주식회사 대한콘설탄트 | Construction method of structure for preventing differential settlement and pushed of concrete orbit |
| CN111424481A (en) * | 2020-03-10 | 2020-07-17 | 西南交通大学 | Expansive soil cutting structure and construction method thereof |
| CN111304969A (en) * | 2020-03-31 | 2020-06-19 | 中铁二院工程集团有限责任公司 | Anti-bulging structure of ballastless track tramcar on strongly expansive soil or expansive rock section |
| CN113931025A (en) * | 2021-12-01 | 2022-01-14 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Three-dimensional drainage system and construction method thereof |
| CN114934407A (en) * | 2022-05-11 | 2022-08-23 | 东方雨虹智能装备有限责任公司 | Construction method for waterproof engineering of high-speed rail |
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