CN105200881A - Construction method for comprehensive treatment structure for subgrade frost damage in high cold region - Google Patents
Construction method for comprehensive treatment structure for subgrade frost damage in high cold region Download PDFInfo
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- CN105200881A CN105200881A CN201510682394.8A CN201510682394A CN105200881A CN 105200881 A CN105200881 A CN 105200881A CN 201510682394 A CN201510682394 A CN 201510682394A CN 105200881 A CN105200881 A CN 105200881A
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Abstract
The invention relates to a construction method for comprehensive treatment for subgrade frost damage in a high cold region. The construction method comprises the following steps: construction layout, blind ditch digging, concrete foundation pouring and blind ditch laying, wherein a blind ditch comprises a concrete foundation, a vertical heat insulation board, a water filter tube, medium-coarse sand, gravels, a transverse heat insulation board, geotechnical cloth and the like from bottom to top; the top of the blind ditch is treated with the following processes of pouring a concrete layer with a side ditch, laying a plastic waterproof board, refilling filled earth of a heat insulation layer, building a mortar rubble masonry pavement, arranging an intercepting drain and the like. The construction method disclosed by the invention is simple in construction process and an operation method. The comprehensive treatment structure for subgrade frost damage in the high cold region, obtained by the construction method, has the advantages that the construction is convenient, dewatering and draining are achieved, freeze injury caused by water seepage is reduced, further water seepage is avoided, the stability of the whole foundation is improved, and the like.
Description
Technical field
The invention belongs to Roadbed Construction Technology field, be specifically related to the construction method of High-cold regions roadbed freeze-harm Comprehensive Treatment structure.
Background technology
Extremely frigid zones winter temperature is low, can increase domatic load after side slope seepage freezes, and simultaneously maximumly to freeze in dark scope because frost heave can destroy domatic original soil stabilization structure, causes landslide.Roadbed infiltration, through long-term corrosion function, can weaken the bulk strength of basic unit, base plinth, and under the repeat function of long-term traffic load, top layer Free water forms mortar, and long-term assembly causes road surface check crack, causes road structure early damage.Winter can there is frost heave because there being water in roadbed, destroys road structure, is ruptured in road surface, endanger traffic safety, increases maintenance costs.Spring melts season, and the soil body is in saturation state, under dynamic loading, causes frost heave, bursts and become muddy when a thaw sets in, emits the diseases such as mud, destroy subgrade stability, impact driving quality.
High-cold regions roadbed cold-proof heat insulation, dredges the infiltration in side slope and roadbed, and infiltration is discharged smoothly, avoids seeping water washing away side slope and causing slope failure to become the difficult point of roadbed freeze-harm integrated treatment.
Given this, need a kind of sequence of construction of invention at present badly reasonable, road bed and lowering water level draining can be ensured, effectively solve construction method and the technique of the frozen earth roadbed seepage problem of extremely frigid zones.
Summary of the invention
The object of the present invention is to provide a kind of construction method of easy High-cold regions roadbed freeze-harm Comprehensive Treatment structure, the structural configuration of improvement french drain on the one hand, the control of rationally process side slope seepage and freeze injury on the other hand, the method taking mole drainage and earth's surface to cut draining to combine, realize infiltration in winter and discharge minimizing freeze injury, further infiltration of avoiding seeping water improves the construction method of whole subgrade stability.
For achieving the above object, present invention employs following technical scheme:
The construction method of described High-cold regions roadbed freeze-harm Comprehensive Treatment structure, is characterized in that comprising the following steps:
1) french drain excavation: by design french drain arrangement diagram, and the left side french drain on Combining with terrain concrete condition road pavement both sides, right side french drain carry out surveying setting-out, and put french drain internal and external contour line on the ground well with lime, then adopts machinery and indirect labor's excavation;
2) left survey french drain is laid: lay permeable geotextiles and waterproof geotextiles by designing requirement, wherein the bottom of french drain, left side and right side adopt permeable geotextiles, its top and left side adopt waterproof geotextiles, concrete foundation, filter pipe, medium coarse sand and rubble is laid successively from top to bottom in order in geotextiles, the vertical warming plate of one deck is added outside waterproof geotextiles on the left of the french drain of left side, add the horizontal warming plate of one deck above the waterproof geotextiles at french drain top, left side, horizontal warming plate end face builds the layer of concrete of one deck band lateral sulcus;
3) lay right survey french drain: the top of right side french drain and right side adopt permeable geotextiles, bottom and left side adopt waterproof geotextiles, lay concrete foundation, filter pipe, medium coarse sand and rubble successively from top to bottom in order in geotextiles;
4) arrange drainage systems to banket with insulation layer: on the rubble of the right side french drain that step 3) is completed, arrange drainage systems transversely adopt levels stacked overlap joint to be connected by plastic plate, often lay a width plastic plate, horse back backfill insulation layer earth material obtains insulation layer and bankets, successively lay and successively backfill, drainage systems and insulation layer banket end of successively constructing;
5) mortar rubble masonry pavement is built: bottom mortar rubble masonry pavement, lay waterproof geotextiles I, side wall is built after waterproof geotextiles I first builds base plate, the staggered lock knot of the flush joint of building by laying bricks or stones, bottom bank protection, gutter is set with intersection, road surface, bank protection end face arranges catchwater, catchwater is between mortar rubble masonry pavement and natural slope, and gutter to be arranged on mortar rubble masonry pavement and to be positioned at side, road surface.
The construction method of described High-cold regions roadbed freeze-harm Comprehensive Treatment structure, is characterized in that the mortar rubble masonry pavement gradient is 1:1.5.
The construction method of described High-cold regions roadbed freeze-harm Comprehensive Treatment structure, is characterized in that step 2) in preset tightening latch is set in vertical warming plate, preset tightening latch is connected with concrete foundation when concreting.
The construction method of described High-cold regions roadbed freeze-harm Comprehensive Treatment structure, is characterized in that step 2) in vertical warming plate and horizontal warming plate intersection bonding agent connect and compose node, node outside angle bar is reinforced.
The construction method of described High-cold regions roadbed freeze-harm Comprehensive Treatment structure, it is characterized in that in step 3), drainage systems overlaps connection by plastic plate by levels stacked, bottom plastic plate is pressed in above upper plastic plate, and overlapping part marine glue is bonding.
The construction method of described High-cold regions roadbed freeze-harm Comprehensive Treatment structure, it is characterized in that seam that plastic plate levels stacked overlaps wide be 30cm.
By adopting above-mentioned technology, compared with prior art, the present invention there is following feature and beneficial effect as follows:
1) french drain is arranged symmetrically with, and the method taking mole drainage and earth's surface to cut draining to combine, reduce the destruction of freeze thawing to the soil body, effectively enhance the stability of roadbed;
2) french drain adopts concrete foundation, vertical warming plate, steel band reinforced polyethylene spiral ripple filter pipe, medium coarse sand, rubble and horizontal warming plate from the bottom to top, surrounding adopts the form of structure of permeable and waterproof geotextiles flexible combination, the effect reaching draining, reduce water level, reduce roadbed freeze-harm;
3) vertical warming plate and concrete foundation adopt reserved peg to be connected and fixed, and vertical warming plate and horizontal warming plate adopt angle bar to be suitable for being connected and fixed, and reach convenient construction, improve the drainage effect of french drain and the object of globality;
4) adopt bonding agent to be connected between warming plate with geotextiles, after bonding process, there is not gap between geotextiles and warming plate, reach and improve the displacement mass of french drain and the object of globality;
5) side slope waterproof adopts french drain, insulation layer to banket and the combining form of splash guard, reaches to reduce winter and seep water freeze injury, avoid seeping water and permeate and improve the effect of whole subgrade stability further;
6) simple, the method for operating of construction method of the present invention, the High-cold regions roadbed freeze-harm Comprehensive Treatment structure obtained by the method has easy construction, dewatering and drainage, reduce winter seep water freeze injury, avoid seeping water and permeate further and improve the advantages such as whole subgrade stability.
Accompanying drawing explanation
Fig. 1 is High-cold regions roadbed freeze-harm Comprehensive Treatment structural layout plan;
Fig. 2 is construction process figure.
In figure: 1-lateral sulcus; 2-layer of concrete; 3-curb; 4-road surface; 5-gutter; 6-mortar rubble masonry pavement; 7-catchwater; 8-is domatic; 9-insulation layer bankets; 10-drainage systems; 11-angle bar; The waterproof geotextiles of 12-; The vertical warming plate of 13-; The horizontal warming plate of 13a-; 14-rubble; The permeable geotextiles of 15-; 16-medium coarse sand; 17-filter pipe; 18-concrete foundation; The preset tightening latch of 19-, the waterproof geotextiles I of 20-.
Detailed description of the invention
Below in conjunction with Figure of description, the invention will be further described, and present embodiment emphasis sets forth the embodiment that the present invention relates to structure.
Fig. 1 represents High-cold regions roadbed freeze-harm Comprehensive Treatment structural layout plan.As shown in the figure, roadbed freeze-harm Comprehensive Treatment structure mainly comprises: road surface 4, lateral sulcus 1, layer of concrete 2, gutter 5, mortar rubble masonry pavement 6, catchwater 7, insulation layer banket 9, drainage systems 10 and french drain composition; Described lateral sulcus 1, gutter 5 are positioned at both sides, road surface 4, lateral sulcus 1 on layer of concrete 2, catchwater 7 is between natural slope 8 and mortar rubble masonry pavement 6, layer of concrete 2 is connected by curb 3 with road surface 4, mortar rubble masonry pavement covers insulation layer for 6 times and bankets 9, insulation layer bankets and lays drainage systems 10 9 times, insulation layer banket 9 bottoms arrange right side french drain, layer of concrete 2 bottom arrange left side french drain; Waterproof geotextiles I 20 is laid bottom mortar rubble masonry pavement 6;
Described left side french drain is from the bottom to top successively by concrete foundation 18, soakaway trench 17, medium coarse sand 16, rubble 14 geotextiles forms, described geotextiles comprises permeable geotextiles 15 and waterproof geotextiles 12, permeable geotextiles 15 is arranged on bottom the french drain of left side and right side wall place, waterproof geotextiles 12 is arranged on the left of the french drain of left side and top, soakaway trench 17 is between concrete foundation 18 and medium coarse sand 16, horizontal warming plate 13a is provided with above the waterproof geotextiles 12 at french drain top, left side, outside waterproof geotextiles 12 on the left of the french drain of left side, vertical warming plate 13 is set, vertical warming plate 13 connects and composes node with horizontal warming plate 13a intersection bonding agent, node outside angle bar 11 is reinforced,
Described right side french drain is made up of concrete foundation 18, soakaway trench 17, medium coarse sand 16, rubble 14 and geotextiles from the bottom to top successively, described geotextiles comprises permeable geotextiles 15 and waterproof geotextiles 12, waterproof geotextiles 12 is arranged on bottom the french drain of right side and left side place, permeable geotextiles 15 is arranged on the right side of the french drain of right side and top, and soakaway trench 17 is between concrete foundation 18 and medium coarse sand 16;
As shown in Figure 2, the construction method of High-cold regions of the present invention roadbed freeze-harm Comprehensive Treatment structure, comprises the steps:
1) by design french drain arrangement diagram Combining with terrain concrete condition carries out french drain surveying setting-out, french drain internal and external contour line is put on the ground well with lime, then machinery is adopted and indirect labor's excavation, when excavating contiguous design ground about 10 ~ 20cm, need change hand excavation into, hand excavation must be careful, speed slows down, do not allow super excavation and owe to dig, can not disturbance side, bottom of trench and domatic original soil layer, slowly excavation is to design attitude;
2) left survey french drain is laid: in the french drain of left side, place the vertical warming plate 13 with preset tightening latch 19 in advance, preset tightening latch 19 is connected with concrete foundation 18 when concreting, then geotextiles is laid, permeable geotextiles 15 is adopted in the bottom of left side french drain and right side by designing requirement, its top and left side adopt waterproof geotextiles 12, geotextiles is executed man-hour requirement and is laid neatly smooth-going, all transverse directions, longitudinal lap joint seam must be alternately arranged, and the lap length need >=300mm of seam, geotextiles lays the thick concrete foundation 18 of 20mm in order from top to bottom successively, employing Handheld vibrator vibrates, two row's filter pipes 17 are laid after concrete strength reaches 85%, filter pipe 17 is spread successively medium coarse sand 16 and rubble 14, then waterproof geotextiles 12 is covered on request, the vertical warming plate 13 of one deck is added outside waterproof geotextiles 12 on the left of the french drain of left side, the horizontal warming plate 13a of one deck is added above the waterproof geotextiles 12 at french drain top, left side, horizontal warming plate 13a end face builds the layer of concrete 2 of one deck band lateral sulcus 1,
3) right survey french drain is laid: the top of right side french drain and right side adopt permeable geotextiles 15, bottom and left side adopt waterproof geotextiles 12, equally, geotextiles is executed man-hour requirement and is laid neatly smooth-going, all transverse directions, longitudinal lap joint seam must be alternately arranged, and the lap length need >=300mm of seam, the thick concrete foundation 18 of 20mm is laid successively from top to bottom in order in geotextiles, employing Handheld vibrator vibrates, two row's filter pipes 17 are laid after concrete strength reaches 85%, filter pipe 17 is spread successively medium coarse sand 16 and rubble 14, then permeable geotextiles 15 is covered on request,
4) with reference to shown in Fig. 2, above the right side french drain that step 3) is completed, side slope arranges drainage systems 10, drainage systems 10 transversely adopts cataphracted levels stacked to overlap, bottom plastic plate is pressed on upper plastic plate, overlapping part waterproof is gluing, the wide 30cm of seam, and per pass seam is parallel with roadbed longitudinal section, drainage systems 10 and domatic between to flatten and tamp, but drainage systems 10 should not be drawn to obtain tension.Often lay a width drainage systems 10, at once backfill insulation layer earth material obtains insulation layer and bankets 9, successively lays and successively backfills, backfill insulation layer banket 9 time, must put down gently, in order to avoid crash through drainage systems 10.
5) mortar rubble masonry pavement is built: with reference to shown in Fig. 2, first lay waterproof geotextiles I 20 bottom mortar rubble masonry pavement, mortar rubble masonry pavement 6 gradient is 1:1.5, acts in accordance with side slope build by laying bricks or stones to pushing up layering successively the end of from when building side slope by laying bricks or stones, first should build base plate when building gutter by laying bricks or stones, then build side wall.First slabstone should be watered before building by laying bricks or stones moistening, to realize the better bonding with mortar.First floor slabstone should greatly facing to basal plane, to ensure and enough contacts area of basal plane, second layer slabstone adopts seat to grout and builds, namely first at the mortar of first floor slabstone upper berth one deck suitable thickness, then second layer slabstone is laid, bottom bank protection, gutter 5 is set with intersection, road surface, after mortar rubble masonry pavement 6 jointing health, catchwater 7 is set at bank protection end face.
Claims (6)
1. the construction method of High-cold regions roadbed freeze-harm Comprehensive Treatment structure, is characterized in that comprising the following steps:
1) french drain excavation: by design french drain arrangement diagram, and the left side french drain on Combining with terrain concrete condition road pavement both sides, right side french drain carry out surveying setting-out, and put french drain internal and external contour line on the ground well with lime, then adopts machinery and indirect labor's excavation;
2) left survey french drain is laid: lay permeable geotextiles (15) and waterproof geotextiles (12) by designing requirement, wherein the bottom of french drain, left side and right side adopt permeable geotextiles (15), its top and left side adopt waterproof geotextiles (12), geotextiles lays concrete foundation (18) in order from top to bottom successively, filter pipe (17), medium coarse sand (16) and rubble (14), the vertical warming plate of one deck (13) is added outside waterproof geotextiles (12) on the left of the french drain of left side, waterproof geotextiles (12) top at french drain top, left side adds the horizontal warming plate (13a) of one deck, horizontal warming plate (13a) end face builds the layer of concrete (2) of one deck band lateral sulcus (1),
3) right survey french drain is laid: the top of right side french drain and right side adopt permeable geotextiles (15), bottom and left side adopt waterproof geotextiles (12), lay concrete foundation (18), filter pipe (17), medium coarse sand (16) and rubble (14) in order from top to bottom successively in geotextiles;
4) arrange drainage systems to banket with insulation layer: on the rubble (14) of the right side french drain that step 3) is completed, arrange drainage systems (10) transversely adopt levels stacked overlap joint to be connected by plastic plate, often lay a width plastic plate, backfill insulation layer earth material obtains insulation layer and bankets (9) at once, successively lay and successively backfill, drainage systems (10) and insulation layer banket (9) successively to construct end;
5) mortar rubble masonry pavement (6) is built: lay waterproof geotextiles I (20) in mortar rubble masonry pavement (6) bottom, side wall is built after waterproof geotextiles I (20) first builds base plate, the staggered lock knot of the flush joint of building by laying bricks or stones, bottom bank protection, gutter (5) is set with intersection, road surface, bank protection end face arranges catchwater (7), catchwater (7) is positioned between mortar rubble masonry pavement (6) and natural slope (8), and gutter (5) is arranged on mortar rubble masonry pavement (6) and goes up and be positioned at road surface (4) side.
2. the construction method of High-cold regions according to claim 1 roadbed freeze-harm Comprehensive Treatment structure, is characterized in that mortar rubble masonry pavement (6) gradient is 1:1.5.
3. the construction method of High-cold regions according to claim 1 roadbed freeze-harm Comprehensive Treatment structure, it is characterized in that step 2) in preset tightening latch (19) is set in vertical warming plate (13), preset tightening latch (19) is connected with concrete foundation (18) when concreting.
4. the construction method of High-cold regions according to claim 1 roadbed freeze-harm Comprehensive Treatment structure, it is characterized in that step 2) in vertical warming plate (13) connect and compose node with horizontal warming plate (13a) intersection bonding agent, the outside angle bar of node (11) reinforcing.
5. the construction method of High-cold regions according to claim 1 roadbed freeze-harm Comprehensive Treatment structure, it is characterized in that drainage systems in step 3) (10) overlaps connection by plastic plate by levels stacked, bottom plastic plate is pressed in above upper plastic plate, and overlapping part marine glue is bonding.
6. the construction method of High-cold regions according to claim 5 roadbed freeze-harm Comprehensive Treatment structure, it is characterized in that seam that plastic plate levels stacked overlaps wide be 30cm.
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Cited By (6)
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| CN107165190A (en) * | 2017-07-04 | 2017-09-15 | 西安科技大学 | Zhong Dong areas roadbed antiseepage anti-freezing and heat-insulating wall construction method |
| CN107938690A (en) * | 2017-12-23 | 2018-04-20 | 中国电力工程顾问集团西北电力设计院有限公司 | A kind of french drain structure and its construction method for Slope Prevention |
| CN108411893A (en) * | 2018-05-14 | 2018-08-17 | 兰州理工大学 | A kind of frost damage prevention water seepage mechanism and its construction method |
| CN109577125A (en) * | 2018-12-12 | 2019-04-05 | 中国十七冶集团有限公司 | A kind of method of extremely frigid zones roadbed frost damage prevention |
| CN109736141A (en) * | 2019-01-29 | 2019-05-10 | 中建新疆建工土木工程有限公司 | The anti-freeze expansion structural body and paving method of Railway Roadbed in Permafrost Regions |
| CN116556235A (en) * | 2023-03-13 | 2023-08-08 | 中国科学院西北生态环境资源研究院 | Gear system for preventing and controlling hot-melt landslide in plateau frozen soil area |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107165190A (en) * | 2017-07-04 | 2017-09-15 | 西安科技大学 | Zhong Dong areas roadbed antiseepage anti-freezing and heat-insulating wall construction method |
| CN107938690A (en) * | 2017-12-23 | 2018-04-20 | 中国电力工程顾问集团西北电力设计院有限公司 | A kind of french drain structure and its construction method for Slope Prevention |
| CN108411893A (en) * | 2018-05-14 | 2018-08-17 | 兰州理工大学 | A kind of frost damage prevention water seepage mechanism and its construction method |
| CN109577125A (en) * | 2018-12-12 | 2019-04-05 | 中国十七冶集团有限公司 | A kind of method of extremely frigid zones roadbed frost damage prevention |
| CN109736141A (en) * | 2019-01-29 | 2019-05-10 | 中建新疆建工土木工程有限公司 | The anti-freeze expansion structural body and paving method of Railway Roadbed in Permafrost Regions |
| CN116556235A (en) * | 2023-03-13 | 2023-08-08 | 中国科学院西北生态环境资源研究院 | Gear system for preventing and controlling hot-melt landslide in plateau frozen soil area |
| CN116556235B (en) * | 2023-03-13 | 2023-09-29 | 中国科学院西北生态环境资源研究院 | Gear system for preventing and controlling hot-melt landslide in plateau frozen soil area |
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Effective date of registration: 20170621 Address after: 810000 No. 54 West 67, Xining, Qinghai Applicant after: ZHENGPING ROAD AND BRIDGE CONSTRUCTION CO., LTD. Address before: 310015 Hangzhou, Gongshu District Wanda Commercial Center, building 3, room 3, unit 1901, room Applicant before: Hangzhou Jiang Run Science and Technology Ltd. |
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