CN105735157A - Large-diameter steel corrugated pipe culvert structure for half-filled and half-dug roadbed in plateau high-cold region and method for constructing large-diameter steel corrugated pipe culvert structure - Google Patents
Large-diameter steel corrugated pipe culvert structure for half-filled and half-dug roadbed in plateau high-cold region and method for constructing large-diameter steel corrugated pipe culvert structure Download PDFInfo
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- CN105735157A CN105735157A CN201610258949.0A CN201610258949A CN105735157A CN 105735157 A CN105735157 A CN 105735157A CN 201610258949 A CN201610258949 A CN 201610258949A CN 105735157 A CN105735157 A CN 105735157A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F5/00—Draining the sub-base, i.e. subgrade or ground-work, e.g. embankment of roads or of the ballastway of railways or draining-off road surface or ballastway drainage by trenches, culverts, or conduits or other specially adapted means
- E01F5/005—Culverts ; Head-structures for culverts, or for drainage-conduit outlets in slopes
Abstract
The invention relates to a large-diameter steel corrugated pipe culvert structure for a half-filled and half-dug roadbed in a plateau high-cold region and a method for constructing the large-diameter steel corrugated pipe culvert structure. The method includes that the half-filled and half-dug roadbed is constructed, and a blind ditch is additionally formed in a position along a slope toe before the roadbed is constructed; single sheets are spliced to form a large-diameter steel corrugated pipe culvert, and every two corrugated plates are connected with each other by flange bolts; the upper steel corrugated plates of lapping portions cover the lower steel corrugated plates when about to be spliced, a movable scaffold is used when the corrugated pipe culvert is spliced, tracks of the scaffold are arranged on the bottom sheets of the corrugated pipe culvert, rollers are mounted on the lower portion of the movable scaffold, brake pedals are arranged on the rollers, an integral scaffold system is provided with the four rollers, and scissors supports are arranged inside the integral scaffold system and on the outer periphery of the integral scaffold system. The large-diameter steel corrugated pipe culvert structure and the method have the advantages that the steel corrugated pipe culvert is provided with a flexible cushion, and accordingly the large-diameter steel corrugated pipe culvert structure can effectively adapt to uniform stress on steel corrugated pipes and possible settlement of foundations.
Description
Technical field
The invention belongs to Con struction in Roadbed technical field, be specifically related to highland and severe cold district cut-fill subgrades Large-diameter Steel corrugated culvert structure and construction method.
Background technology
Extremely frigid zones pressure on circular reinforced concrete culvert or slab culvert be the damages occurred in various degree in use more, and more serious disease is that uneven settlement of foundation causes that culvert destroys.But Steel Corrugated Pipe Culvert has the very strong ability adapting to ground and foundation deformation, it is possible to solve the culvert because foundation differential settlement causes and destroy problem.In bad geotechnical areas such as weak soil, swelled ground, collapsible loess, ever-frozen ground, high-fill roadbed sedimentation section, there is the advantage of anti-culvert cracking destruction.It is further substituted large volume bricklaying, xoncrete structure, reduces cubic meter of stone exploitation massif and destroy, be beneficial to environmental protection；And construct convenient quickly, the repeatable utilization of agent structure, at road rapid repair, provide rescue and relief for disasters and emergencies, have broad application prospects in interim sidewalk, underground engineering safety support etc..
Relative to ordinary reinforced concrete culvert, Performance Test of Corrugated Steel Culvert is prone to construction, and the feature particularly being easy to construct at rainy season, extremely frigid zones makes it be used widely, and applies respond well.Although Performance Test of Corrugated Steel Culvert has been applied at extremely frigid zones and increased sharply, but construction equipment, construction technology are not quite similar, and have impact on construction quality.The construction of the highway of highland and severe cold district be subject to construction seasons impact, the whole year can the engineering time shorter；There are minute crack the corrosion phenomenon of some in the local, road surface, Performance Test of Corrugated Steel Culvert top that current extremely frigid zones has been constructed；The simultaneously Large-diameter Steel corrugated culvert construction technology in highland and severe cold district also immaturity.
Given this, the feature of construction seasons impact it is subject to for the construction of the highway of highland and severe cold district, in order to accelerate construction speed and the construction quality of Large-diameter Steel corrugated culvert, urgently invent a kind of simple and effective highland and severe cold district cut-fill subgrades Large-diameter Steel corrugated culvert construction method, improve construction quality and the efficiency of construction of major diameter corrugated culvert.
Summary of the invention
It is an object of the invention to improve the deficiency of tradition corrugated culvert form of construction work; a kind of highland and severe cold district cut-fill subgrades Large-diameter Steel corrugated culvert structure and construction method are provided; it can improve construction quality and the efficiency of construction of major diameter corrugated culvert; have ecological protection, resources concurrently, there is good technical economic benefit.
For achieving the above object, present invention employs techniques below scheme:
nullHighland and severe cold district cut-fill subgrades Large-diameter Steel corrugated culvert structure，Including substrate and major diameter corrugated culvert，Described substrate is provided with plain concrete plate，Described plain concrete plate is equipped with flexible cushion，Described major diameter corrugated culvert is arranged on flexible cushion，Described flexible cushion is equipped with GSZ，The below ground at described major diameter corrugated culvert two ends place in the radial direction is provided with splayed beam basis，Splayed beam is set up on described splayed beam basis，Reinforced-concrete plate is set up in the bottom of described splayed beam，The top of described splayed beam is erected with cap stone，Described major diameter corrugated culvert is in axial direction equipped with GSZ，The upper plane of described reinforced-concrete plate lays sand bedding course，The arranged outside barricade of described major diameter corrugated culvert，Bottom the axial two-port of described major diameter corrugated culvert, stabilization zone is set，Described stabilization zone has reinforcing basic unit，The interior outside of described splayed beam is respectively equipped with inner side slabstone bank protection and slabstone bank protection，The toe of described slabstone bank protection offers french drain，It is provided with inside inside described major diameter corrugated culvert and adjustable temporary support is set，Described GSZ is filled backfill soil.
Described highland and severe cold district cut-fill subgrades Large-diameter Steel corrugated culvert structure, it is characterised in that described GSZ is direction earthwork grille.
Described highland and severe cold district cut-fill subgrades Large-diameter Steel corrugated culvert structure, it is characterized in that, described barricade is provided with pre-buried draw ring, pre-buried draw ring is provided with fixing band, fixing band one end is fixed on the pre-buried draw ring in side, and the other end is close to outside major diameter corrugated culvert and is fixed on the pre-buried draw ring of opposite side.
Described highland and severe cold district cut-fill subgrades Large-diameter Steel corrugated culvert structure, it is characterized in that, described major diameter corrugated culvert is Steel Corrugated Pipe Culvert, ripple section of jurisdiction is adopted to be bolted composition, ripple is provided with anticorrosive coat inside and outside section of jurisdiction, anticorrosive coat is provided with waterproof layer, adopts sealant sealing between gap, described ripple section of jurisdiction.
Described highland and severe cold district cut-fill subgrades Large-diameter Steel corrugated culvert structure, it is characterised in that described adjustable temporary support is umbrella-shaped structure, has threaded adjusting section near middle part, is provided with arc band iron bottom support bar, and support bar is adjustable type.
Described highland and severe cold district cut-fill subgrades Large-diameter Steel corrugated culvert structure, it is characterised in that described flexible cushion radially reserves the basic camber of 0.2%～0.5% at major diameter corrugated culvert.
Described highland and severe cold district cut-fill subgrades Large-diameter Steel corrugated culvert structure, it is characterised in that barricade and major diameter corrugated culvert gap are filled with cement stabilizing sand grains.
The construction method of described highland and severe cold district cut-fill subgrades Large-diameter Steel corrugated culvert structure, comprises the following steps:
1) underlayment is smooth: offers french drain in the toe position of slabstone bank protection before construction, digs base section excavation section by section, fill out base section back-filling in layers, compacting, adopts sand grains to change in frozen soil and fills out；
2) reinforce the process of basic unit bottom the axial two-port of major diameter corrugated tube: the construction area bottom the axial two-port of major diameter corrugated culvert is changed and fills out process, change and fill out position, upper back packing real soil formation stabilization zone；
3) cushion construction: construct a laminin concrete slab in substrate, top construction flexible cushion, lay one layer of GSZ subsequently；
4) basis camber is set: cement stabilizing sand grains longitudinally reserves the basic camber of 0.2%～0.5% at major diameter corrugated culvert；
5) corrugated culvert egative film is installed: ripple section of jurisdiction is close on flexible cushion, with central axis, start of installation position for benchmark, 1st ripple section of jurisdiction is positioned, tube coupling both sides are respectively fixed with two jack, 2nd corrugated tube oblique cut grafting is on the 1st ripple section of jurisdiction, insert bolt, nut is carried out pretension；
6) setting up packaged type scaffold in pipe culvert: roller track is placed in major diameter corrugated culvert on egative film, be provided with the fixing plate of track between two track plates, roller is placed on roller track, and roller is set up scaffold, and operating platform is laid on transverse horizontal bar top；
7) remaining ripple section of jurisdiction is installed: remaining corrugated culvert sheet can be constructed on packaged type scaffold, supreme splicing under ripple pipe sheet assembling annular；On overlap, ripple section of jurisdiction covers lower ripple section of jurisdiction, the circumferential stairstepping that is connected by, and after connecting hole aligns, inserts bolt, nut is carried out pretension；
8) major diameter corrugated culvert water-proofing treatment: ripple section of jurisdiction connecting sewing and bolt hole adopt sealant sealing to process；Outside brushing waterproof layer in major diameter corrugated culvert；
9) ripple tube side backfill: adjustable temporary support is set inside major diameter corrugated culvert, outside major diameter corrugated tube culvert pipe, barricade is set every uniform distances, barricade is provided with pre-buried draw ring, fixing band one end is fixed on the pre-buried draw ring in side, the other end is close to outside corrugated tube and is fixed on the pre-buried draw ring of opposite side, type part backfill cement stabilizing sand grains, the soil of pipe culvert lateral symmetry backfill subsequently, construction in layer is carved at 45 °-90 °.
The construction method of described highland and severe cold district cut-fill subgrades Large-diameter Steel corrugated culvert structure, it is characterised in that described step 1) fill out dug after carry out pipe culvert excavation of foundation pit again.
The invention have the advantages that:
1) first the present invention constructs cut-fill subgrades, adopts cement stabilizing sand grains that basis is changed subsequently and fills out, and adopts packaged type scaffold during corrugated culvert assembly, and whole work progress is simple to operate, remarkable benefit；
2) Steel Corrugated Pipe Culvert of the present invention adopts flexible cushion, can better be suitable for corrugated steel pipe uniform stressed and sedimentation that ground is likely to occur；
3) construction area of corrugated tube two oxter is carried out consolidation process by the present invention, simultaneously at the real soil of corrugated tube two oxter packing, can strengthen the antiskid performance of major diameter corrugated culvert；
4) corrugated culvert egative film of the present invention arranges packaged type scaffold, scaffold is installed operating platform, it is simple to major diameter corrugated culvert is assembled.
Accompanying drawing explanation
Fig. 1 is highland and severe cold district of the present invention cut-fill subgrades Large-diameter Steel corrugated culvert construction method structural representation；
Fig. 2 is Large-diameter Steel corrugated culvert plane graph of the present invention；
Fig. 3 is Large-diameter Steel corrugated culvert hole of the present invention profile；
Fig. 4 is the A-A profile of Fig. 2；
Fig. 5 is the B-B profile of Fig. 2；
Fig. 6 is the C-C profile of Fig. 2；
Fig. 7 is packaged type scaffold schematic diagram in pipe culvert of the present invention；
Fig. 8 is pipe culvert of the present invention splicing schematic diagram；
Fig. 9 is the adjustable temporary support schematic diagram of the present invention；
Figure 10 is corrugated steel pipe chip architecture schematic diagram of the present invention；
Figure 11 is dams setting schematic diagram of the present invention；
Figure 12 is work progress figure of the present invention.
nullIn figure: 1. major diameter corrugated culvert，2. flexible cushion，3. reinforced-concrete plate，4. substrate，5. GSZ，6. stabilization zone，7. reinforce basic unit，8. plain concrete plate，9. cap stone，10. backfill soil，11. roadbed sideline，12. roadbed centrage，13. splayed beam，14. slabstone bank protection，15. inner side slabstone bank protection，16. major diameter corrugated tube axis，17. sand bedding course，18. splayed beam is basic，19. the pre-arch in basis，20. cement stabilizing sand grains，21. it is domatic，22. ground，23. waterproof layer，24. ground floor operating platform，25. scaffold，26. second layer operating platform，27. cruciform fastening for falsework，28. original place upper thread，29. barricade，30. roller，31. roller track，32. roller brake plate，33. plate fixed by track，34. french drain，35. fixing band，36. pre-buried draw ring，37. adjustable temporary support，38. adjustment section，39. ripple section of jurisdiction，40. bolt，41. anticorrosive coat，42. arc band iron，43. fluid sealant.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is further elaborated.
As shown in figs. 1-12, highland and severe cold district cut-fill subgrades Large-diameter Steel corrugated culvert structure, including major diameter corrugated culvert 1, flexible cushion 2, reinforced-concrete plate 3, platform back of the body substrate 4, GSZ 5, stabilization zone 6, reinforce that basic unit 7, plain concrete plate 8, cap stone 9, backfill soil 10, splayed beam 13, slabstone bank protection 14, inner side slabstone bank protection 15, sand bedding course 17, splayed beam basis 18,21 be domatic, 22 ground, barricade 29 and 34 french drain.Described major diameter corrugated culvert 1 adopts and passes through what bolt 40 was formed by connecting between some ripple sections of jurisdiction 39, fluid sealant 43 is adopted to seal between ripple section of jurisdiction 39, the ectonexine of ripple section of jurisdiction 39 is equipped with anticorrosive coat 41, anticorrosive coat 41 is provided with waterproof layer 23, described barricade 29 is provided with and buries draw ring 36, pre-buried draw ring 36 is provided with fixing band 35, fixing band 35 one end is fixed on the pre-buried draw ring 36 in side, the other end is close to outside major diameter corrugated culvert 1 and is fixed on the pre-buried draw ring of opposite side 36, is fixed by major diameter corrugated culvert 1.Described major diameter corrugated culvert 1 is internal is provided with adjustable temporary support 37, adjustable temporary support 37 is umbrella-shaped structure, threaded adjusting section 38 is had near middle part, arc band iron 42 it is provided with bottom support bar, support bar is adjustable type, described flexible cushion 2 is cement stabilizing sand grains 20, and described flexible cushion 2 radially reserves the basic camber 19 of 0.2%～0.5% at major diameter corrugated culvert 1.Described GSZ 5 is filled backfill soil 10.
Cut-fill subgrades domatic 21 adopts slabstone bank protection 14, bottom slabstone bank protection 14, toe is provided with french drain 34, excavation corrugated culvert foundation ditch after cut-fill subgrades is smooth, major diameter corrugated culvert 1 arranges stabilization zone 6 bottom axial two ends, stabilization zone 6 is the sand grains that the local grating drawn materials is good, stabilization zone 6 has reinforcing basic unit 7, reinforcing basic unit 7 is that sand grains Huan Tian district flexible cushion 2 adopts conventional cement stabilizing sand grains 20, major diameter corrugated culvert 1 is placed on cement stabilizing sand grains 20, the cement used when cement stabilizing sand grains 20 coordinates is slow hardening Portland cement, rubble is 10-30mm rubble, 5-10mm rubble and the aggregate chips less than 5mm, less than 0.5mm, aggregate chips expects that plasticity index is not more than 8.Laying GSZ 5 on cement stabilizing sand grains 20, GSZ 5 is direction earthwork grille, warp-wise and broadwise ultimate strength >=50kN/m.The longitudinal two ends of major diameter corrugated culvert 1 are provided with splayed beam 13, and the interior outside of splayed beam 13 is respectively equipped with inner side slabstone bank protection 15 and slabstone bank protection 14, and slabstone Stone Strength grade is not less than MU30.
nullAs shown in Figure 7，The roller track 31 of scaffold 25 is placed in major diameter corrugated culvert 1 on egative film，It coincide with major diameter corrugated tube 1 external waviness bottom the roller track 31 of scaffold 25，The fixing plate 33 of track it is provided with between two track plates，Roller track 31 is Q235 steel with the fixing plate 33 of track，Both are welded and fixed，Scaffold 25 is packaged type，Bottom is provided with four rolling 30，Roller 30 is provided with roller brake plate 32，Roller 30 is placed on roller track 31，Roller 30 is set up scaffold 25，Adopt steel pipe scaffold，Scaffold 25 can vertically move to major diameter corrugated culvert 1 along with construction speed，Internal and outside surrounding is equipped with bridging，Transverse horizontal bar is located under longitudinal rod，Transfer is 1.05m，Vertical rod advance is 1.5m，Scaffold building all adopts the steel pipe of φ 48mm，Intensity Q 235，Height is chosen according to major diameter corrugated culvert 1 diameter，And fix with cruciform fastening for falsework 27，Wooden operating platform is laid on cross bar top，Described operating platform includes ground floor operating platform 24 and second layer operating platform 26.
As shown in Figure 8: major diameter corrugated culvert 1 diameter is 6 meters, 6 assembly of time-division of constructing, pipe shaft adopts Q235A hot rolled steel plate to make, steel plate yield strength >=235MPa, comprcssive strength >=375MPa, carries out galvanizing by dipping preservative treatment, clean appearance before dispatching from the factory, without hole, seaming is without cracking, without threading off.Supreme splicing under the assembled annular in ripple section of jurisdiction 39；On overlap, ripple section of jurisdiction 39 covers lower ripple section of jurisdiction 39, circumferential it is connected by stairstepping, after connecting hole aligns, insert bolt 40, nut is carried out pretension, after assembled complete 1 segmental length of above step, this sections to be carried out cross sectional shape and the mensuration of axis off normal, meet design requirement and be further continued for assembly；Being unsatisfactory for should correcting in time of requirement, cross sectional shape and axis off normal are regulated by jack.
As it is shown in figure 9, the steel pipe that adjustable temporary support 37 adopts diameter to be 48mm, middle part cruciform fastening for falsework is fixed, and has threaded adjusting section 38 conveniently to regulate length near middle part, one piece of arc band iron 42 of end welding, increases the contact area with ripple section of jurisdiction 39.
As shown in Figure 10, there are galvanized anticorrosive layer 41, the heated bitumen waterproof layer of brushing twice respectively 23 inside and outside after assembly is complete in ripple section of jurisdiction 39 in interior outside before dispatching from the factory respectively.
As shown in figure 11: the barricade of high 50cm is set every 5 meters at corrugated tube before banketing, the brick triangularity of barricade, stablize sand grains 20 with corrugated tube gap filling concrete.
As shown in figure 12, the invention mainly comprises following construction procedure:
1) underlayment is smooth: set up french drain 34 in slabstone bank protection 14 toe position before construction, is guided to by water beyond embankment district in gutter, digs base section excavation section by section, fill out base section back-filling in layers, compacting, frozen soil employing sand grains is changed and fills out；
2) it is provided with reinforcing basic unit 7 bottom the axial two-port of major diameter corrugated culvert 1 to process: to the seasonal frost heave district of construction area bottom the axial two-port of major diameter corrugated culvert 1, carry out changing filling out with the sand grains that grating is good, change and fill out position, upper back packing real soil formation stabilization zone 6；
3) cushion construction: flexible cushion 2 adopts cement stabilizing sand grains 20, the cement used when cement stabilizing sand grains 20 coordinates is slow hardening Portland cement, rubble is 10-30mm rubble, 5-10mm rubble and the aggregate chips less than 5mm, expects that plasticity index is not more than 8 less than 0.5mm in aggregate chips.The cement stabilizing sand grains 20 mixed and stirred directly transport to pipe culvert foundation ditch after hand fit's loader uniformly pave with on underlayment, layered rolling, having paved and laid one layer of GSZ 5 before cement final set, GSZ 5 is direction earthwork grille, warp-wise and broadwise ultimate strength >=50kN/m.Major diameter corrugated culvert longitudinal direction two ends are provided with splayed beam 13, are provided with inner side slabstone bank protection 15 inside splayed beam 13, and outside is provided with slabstone bank protection 14, and slabstone Stone Strength grade is not less than MU30；
4) basis camber 19 is set: cement stabilizing sand grains 20 longitudinally reserves the basic camber 19 of 0.2%～0.5% at major diameter corrugated culvert 1, and basis camber 19 successively controls along with the construction of bed course；
5) installing corrugated culvert egative film: pipe shaft adopts Q235A hot rolled steel plate to make, steel plate yield strength >=235MPa, comprcssive strength >=375MPa first checks for pipe culvert base foundation flatness, level, absolute altitude；Determine culvert location, central axis, midpoint, roadbed centrage 12, major diameter corrugated culvert axis 16 and original place upper thread 28.Pipe shaft is installed and should be close on flexible cushion 2, makes pipe culvert energy uniform force, center is symmetrically installed to two ends.With central axis, start of installation position for benchmark, being positioned first ripple section of jurisdiction 39, tube coupling both sides are respectively fixed with a jack, it is prevented that bigger off normal occurs in installation process central axis, extend to the other end with this as the starting point；Second ripple section of jurisdiction 39 is overlapped on above first ripple section of jurisdiction 39, makes connecting hole between two ripple sections of jurisdiction align.From inside to outside bolt 40 is inserted connecting hole, washer nut is enclosed within outside, nut is carried out pretension；
null6) packaged type scaffold is set up in pipe culvert: the roller track 31 of scaffold 25 is placed in major diameter corrugated culvert 1 on egative film，It coincide with major diameter corrugated tube 1 external waviness bottom the roller track 31 of scaffold 25，The fixing plate 33 of track it is provided with between two track plates，Roller track 31 is Q235 steel with the fixing plate 33 of track，Both are welded and fixed，Scaffold 25 bottom is provided with four rolling 30，Roller 30 is provided with roller brake plate 32，Roller 30 is placed on track，Roller 30 is set up scaffold 25，Adopt steel pipe scaffold，Scaffold 25 can vertically move to major diameter corrugated culvert 1 along with construction speed，Internal and outside surrounding is equipped with bridging，Transverse horizontal bar is located under longitudinal rod，Transfer is 1.05m，Vertical rod advance is 1.5m，Scaffold 25 is set up and is all adopted φ 48mm steel pipe，Intensity Q 235，Height is chosen according to major diameter corrugated culvert 1 diameter，And fix with cruciform fastening for falsework 27，Wooden operating platform is laid on cross bar top，Operating platform is plank；
7) remaining ripple section of jurisdiction 39 is installed: remaining corrugated culvert sheet 39 can be constructed on packaged type scaffold, supreme splicing under the assembled annular in ripple section of jurisdiction 39；On overlap, ripple section of jurisdiction 39 covers lower ripple section of jurisdiction 39, the circumferential stairstepping that is connected by, and after connecting hole aligns, inserts flange bolt, nut is carried out pretension；
8) major diameter corrugated culvert 1 water-proofing treatment: after connecting bolt 35 is tightened and met the requirements, adopts Special seal material seal at bolt hole place, outside brushing twice bituminous water-proof coating 23 in ripple section of jurisdiction 39；
9) ripple tube side backfill: adjustable temporary support is set inside major diameter corrugated culvert before backfill, adjustable temporary support adopts the steel pipe of diameter 48mm, middle part cruciform fastening for falsework is fixed, threaded adjusting section is had conveniently to regulate length near middle part, one piece of arc iron plate of end welding, increases the contact area with major diameter corrugated culvert 1.The barricade of high 1 meter, the brick triangularity of barricade are set every 5 meters at corrugated tube before banketing, stablize sand grains with corrugated tube gap filling concrete.Steel Corrugated Pipe Culvert tube side carves type part backfill cement stabilizing sand grains 20 more than 45 degree, lays one layer of GSZ 5 during backfill at about 50cm place from major diameter corrugated culvert 1 pipe top.Pipe culvert both sides backfill soil 10 answers symmetrical, construction in layer, and every layer thickness, less than 20cm, is backfilled to concordant with roadbed sideline 11.
Claims (9)
- null1. highland and severe cold district cut-fill subgrades Large-diameter Steel corrugated culvert structure，Including substrate (4) and major diameter corrugated culvert (1)，It is characterized in that，Described substrate (4) is provided with plain concrete plate (8)，Described plain concrete plate (8) is equipped with flexible cushion (2)，Described major diameter corrugated culvert (1) is arranged on flexible cushion (2)，Described flexible cushion (2) is equipped with GSZ (5)，The ground (22) at described major diameter corrugated culvert (1) two ends place in the radial direction is to have splayed beam basis (18)，Described splayed beam basis (18) sets up splayed beam (13)，Reinforced-concrete plate (3) is set up in the bottom of described splayed beam (13)，The top of described splayed beam (3) is erected with cap stone (9)，Described major diameter corrugated culvert (1) is in axial direction equipped with GSZ (5)，The upper plane of described reinforced-concrete plate (3) lays sand bedding course (17)，The arranged outside barricade (29) of described major diameter corrugated culvert (1)，Bottom the axial two-port of described major diameter corrugated culvert (1), stabilization zone (6) is set，Described stabilization zone (6) has reinforcing basic unit (7)，The interior outside of described splayed beam is respectively equipped with inner side slabstone bank protection (15) and slabstone bank protection (14)，The toe of described slabstone bank protection (14) offers french drain (34)，It is provided with inside inside described major diameter corrugated culvert and adjustable temporary support (37) is set，Described GSZ (5) is upper fills backfill soil (10).
- 2. highland and severe cold district according to claim 1 cut-fill subgrades Large-diameter Steel corrugated culvert structure, it is characterised in that described GSZ (5) is direction earthwork grille.
- 3. highland and severe cold district according to claim 1 cut-fill subgrades Large-diameter Steel corrugated culvert structure, it is characterized in that, described barricade (29) is provided with pre-buried draw ring (36), pre-buried draw ring (36) is provided with fixing band (35), fixing band (35) one end is fixed on the pre-buried draw ring in side (36), and the other end is close to major diameter corrugated culvert (1) outside and is fixed on the pre-buried draw ring of opposite side (36).
- 4. highland and severe cold district according to claim 1 cut-fill subgrades Large-diameter Steel corrugated culvert structure, it is characterized in that, described major diameter corrugated culvert (1) is Steel Corrugated Pipe Culvert, ripple section of jurisdiction (39) is adopted to be connected and composed by bolt (40), anticorrosive coat (41) it is externally provided with in ripple section of jurisdiction (39), anticorrosive coat (41) is provided with waterproof layer (23), adopts fluid sealant (43) to seal between described ripple section of jurisdiction (39) gap.
- 5. highland and severe cold district according to claim 1 cut-fill subgrades Large-diameter Steel corrugated culvert structure, it is characterized in that, described adjustable temporary support (37) is umbrella-shaped structure, threaded adjusting section (38) is had near middle part, being provided with arc band iron (42) bottom support bar, support bar is adjustable type.
- 6. highland and severe cold district according to claim 1 cut-fill subgrades Large-diameter Steel corrugated culvert structure, it is characterised in that described flexible cushion (2) radially reserves the basic camber (19) of 0.2%～0.5% at major diameter corrugated culvert (1).
- 7. highland and severe cold district according to claim 1 cut-fill subgrades Large-diameter Steel corrugated culvert structure, it is characterised in that barricade (29) and major diameter corrugated culvert (1) gap are filled with cement stabilizing sand grains (20).
- 8. the construction method according to the arbitrary described highland and severe cold district cut-fill subgrades Large-diameter Steel corrugated culvert structure of claim 1-7, it is characterised in that comprise the following steps:1) underlayment is smooth: offers french drain (34) in the toe position of slabstone bank protection (14) before construction, digs base section excavation section by section, fill out base section back-filling in layers, compacting, adopts sand grains to change in frozen soil and fills out；2) process of basic unit (7) is reinforced bottom the axial two-port of major diameter corrugated tube (1): the construction area bottom major diameter corrugated culvert (1) axially two-port is changed and fills out process, change and fill out real soil formation stabilization zone (6) of position, upper back packing；3) cushion construction: construct a laminin concrete slab (8) in substrate, top construction flexible cushion (2), lay one layer of GSZ (5) subsequently；4) basis camber (19) is set: cement stabilizing sand grains (20) longitudinally reserves the basic camber (19) of 0.2%～0.5% at major diameter corrugated culvert (1)；5) corrugated culvert egative film is installed: ripple section of jurisdiction (39) are close on flexible cushion (2), with central axis, start of installation position for benchmark, 1st ripple section of jurisdiction (39) is positioned, tube coupling both sides are respectively fixed with two jack, 2nd ripple section of jurisdiction (39) is overlapped on the 1st ripple section of jurisdiction (39) above, insert bolt (40), nut is carried out pretension；6) packaged type scaffold is set up in pipe culvert: roller track (31) is placed on major diameter corrugated culvert (1) interior egative film, the fixing plate (33) of track it is provided with between two track plates, roller (30) is placed on roller track (31), setting up scaffold (25) on roller (30), operating platform is laid on transverse horizontal bar top；7) remaining ripple section of jurisdiction (39) is installed: remaining corrugated culvert sheet (39) can be constructed on packaged type scaffold, supreme splicing under ripple section of jurisdiction (39) assembled annular；On overlap, ripple section of jurisdiction (39) cover lower ripple section of jurisdiction (39), the circumferential stairstepping that is connected by, and after connecting hole aligns, insert bolt (40), nut is carried out pretension；8) major diameter corrugated culvert (1) water-proofing treatment: ripple section of jurisdiction (39) connecting sewing adopts fluid sealant (43) encapsulation process with bolt hole；Outside brushing waterproof layer (23) in major diameter corrugated culvert (1)；9) ripple tube side backfill: major diameter corrugated culvert (1) is internal arranges adjustable temporary support (37), outside major diameter corrugated culvert (1) pipe, barricade (29) is set every uniform distances, barricade (29) is provided with pre-buried draw ring (36), fixing band (35) one end is fixed on the pre-buried draw ring in side (36), and the other end is close to outside corrugated tube and is fixed on the pre-buried draw ring of opposite side (36)；Type part backfill cement stabilizing sand grains (20) is carved, pipe culvert lateral symmetry backfill subsequently soil (10), construction in layer at 45 °-90 °.
- 9. the construction method of highland and severe cold district according to claim 8 cut-fill subgrades Large-diameter Steel corrugated culvert structure, it is characterised in that described step 1) fill out dug after carry out pipe culvert excavation of foundation pit again.
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| CN110438914A (en) * | 2019-07-01 | 2019-11-12 | 中国葛洲坝集团第一工程有限公司 | Water tank culvert and its construction method are crossed on soft soil foundation |
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