CN104674763A - Method for repairing wide and large cracks of hydraulic engineering bituminous concrete impervious face slab - Google Patents
Method for repairing wide and large cracks of hydraulic engineering bituminous concrete impervious face slab Download PDFInfo
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- CN104674763A CN104674763A CN201510005803.0A CN201510005803A CN104674763A CN 104674763 A CN104674763 A CN 104674763A CN 201510005803 A CN201510005803 A CN 201510005803A CN 104674763 A CN104674763 A CN 104674763A
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Abstract
The invention relates to a method for repairing wide and large cracks of a hydraulic engineering bituminous concrete impervious face slab. The method is mainly used for repairing cracks of which the widths are greater than 2mm and the occurrence is complicated, the repairing efficiency on the cracks of the bituminous concrete impervious face slab is improved, the safety and the reliability on engineering running are improved, and the economic benefit is high. According to the technical scheme, the method for repairing the wide and large cracks of the hydraulic engineering bituminous concrete impervious face slab is mainly characterized by comprising the following steps of (a) groove forming and backfill construction, (b) groove edge trimming, (c) construction on a cementation layer, (d) construction on an impermeable layer, (e) construction on polyester grids, (f) construction on a thickening layer, and (g) construction on a closed layer. The method is suitable for similar projects such as seepage proofing on reservoir basins of bituminous concrete face slabs in a bituminous concrete face slab rock-fill dam and a pumped storage power station.
Description
Technical field
The present invention relates to the method for repairing and mending in the roomy crack of a kind of hydraulic asphalt concrete anti-seepage panel, be mainly applicable to the similar engineering such as bitumen concrete faced rockfill dam, the basin antiseepage of pumped storage power plant medium pitch concrete slab storehouse.
Background technology
In bitumen concrete faced rockfill dam, the inhomogeneities due to dam embankment causes the differential settlement of panel, thus causes the Fracture Deformation of asphalt concrete anti-seepage panel; Or in the basin seepage control project of pumped storage power plant asphalt concrete face slab storehouse, because the sudden change etc. of ground material composition, geological conditions will cause the inhomogeneous deformation of face slab for water retaining, panel will produce crack; Or after asphalt concrete face slab longtime running, due to its aging action, panel also will be caused to produce crack.In many diseases of asphalt concrete face slab seepage control project, crack is the most general, the most important disease form of asphalt concrete anti-seepage panel, the most remarkable on impacts such as the safe operations of the durability of asphalt concrete anti-seepage panel, globality, engineering, therefore, need to take engineering measure, the crack of asphalt concrete anti-seepage panel is administered.Judging from the current situation, (be less than 2mm) when crack width is less, the measure of process is more, and construct convenient, reliability is higher; But for the crack of width comparatively large (being greater than 2mm), occurrence complexity, still lack efficient, safe and reliable engineering measure.
Summary of the invention
The technical problem to be solved in the present invention is: for above-mentioned Problems existing, the method for repairing and mending in the roomy crack of a kind of hydraulic asphalt concrete anti-seepage panel is provided, the crack of 2mm, occurrence complexity is greater than mainly for width, to improve the efficiency of asphalt concrete anti-seepage panel crack repairing, the safety and reliability that enhancement engineering runs, has good economic benefit.
The technical solution adopted in the present invention is: the method for repairing and mending in the roomy crack of a kind of hydraulic asphalt concrete anti-seepage panel, is primarily characterized in that and comprises the following steps:
A. raggle and backfill construction: according to the scope of designing requirement size determination raggle, then with concrete cutting machine by bituminous concrete stripping and slicing, artificial crowbar prizes the bituminous concrete square cut, raggle surrounding manually repaiies inclined-plane at 45 ° with drill rod, excavate the draining layered material in cut coverage and anti-filter layered material, after inspection no problem is carried out to the construction quality of drainage blanket, loaded filter and ground, again configuration drainage blanket and loaded filter is required according to former design grating, manually successively fill design altitude, every layer of 10 ~ 15cm, successively tamps with hand steered vibro-rammer;
B. trough rim finishing: carry out roasting limit by special propane burner, baking temperature controls at 190 ~ 210 DEG C, bakes while repair smooth-going with spades by 45 ° of inclined-planes, meanwhile, roots out destroyed bituminous concrete, expose the bituminous concrete that original state is fresh;
C. glued layer construction: before glued layer construction, is painted on the good drainage blanket surface of compacting and 45 ° of inclined-planes equably by mulseal; By 70 DEG C in flow-like pitch: stone flour=1: the bitumastic of 2 is painted on 45 ° of inclined-planes, scrapes evenly with spades; The bituminous concrete of temperature 170 ~ 200 DEG C is transported to paving site, glued layer one deck that 8cm is thick has paved, glued layer placement temperature is 160 ~ 190 DEG C, hand steered vibro-rammer vibrates 4 ~ 5 times, temperature controls at 160 ± 10 DEG C, levelling by shake pressure 2 times of vibrating plate again, temperature controls at 120 ~ 130 DEG C; Glued layer puts in storage while with burner heating raggle periphery, again with the hand-held vibrator tamping peripheral seam of heating after glued layer tamping, guarantee that adhesion of new and old concrete is good;
D. impervious barrier construction: the bituminous concrete of temperature 170 ~ 190 DEG C is transported to the place that paves, first evenly brushing mulseal is surperficial in the glued layer of new paving, and heat raggle periphery with burner, impervious barrier gross thickness 10cm, divide 2 layers and pave, 1st layer is 5cm, asphalt concrete material temperature controls at 170 ~ 190 DEG C, and the 1st layer adopts hand steered vibro-rammer to shake pressure 6 times, and temperature controls at 160 ± 10 DEG C, then vibrating plate shakes pressure 2 times, and temperature controls at 120-130 DEG C; 2nd layer of paving thickness 5cm, rolls with 2t vibrating roller, and first static pressure shakes for 2 times pressure 6 times again, then static pressure 2 times is levelling, and when rolling, muller will keep moistening;
E. polyester grid construction: heat with the cold seam of infrared element to bonding surface, then with the compacting of hand-held heating vibrator, even brushing mulseal, spreads 2 strata fat grids, more even brushing mulseal, polyester grid will keep smooth-going;
F. thickening layer construction: the asphalt concrete material of the thickening layer that paves, the thickness of thickening layer is 5cm, adopt 1 layer to pave, thickening layer end face slightly arches upward radian, so that compacting, its construction method and the same impervious barrier of material therefor, overlay thickness is 5cm after guaranteeing compacting, and thickening layer periphery is with using the flanging of heating vibrator after infrared element heating again;
G. confining bed construction: bitumastic enclosed layer thickness is 2mm, material therefor weight ratio is pitch: stone flour=30: 70, by asphalt heating to 120 ± 10 DEG C, then dry stone flour is slowly added by proportioning, ceaselessly stir while add stone flour limit, until uniform mixing, continue little fire and be heated to 190 DEG C, control this temperature at more than 6h; During job site, with iron spoon, the bitumastic processed is poured on construction part, construction temperature, at 190 DEG C, strikes off with the scraper plate of band rubber tile, one-shot forming and being combined well with former confining bed bitumastic.
The invention has the beneficial effects as follows: the present invention has following characteristics to the roomy crack repairing method of asphalt concrete anti-seepage panel: 1, safety: the drainage blanket, loaded filter, ground etc. of the method fracture bottom check, the origin cause of formation of fracture has carried out careful research and analysis, eliminate the possibility in this asphalt concrete anti-seepage panel secondary crack, position, for the safe impounding and operation of engineering provides good guarantee; 2, practicality: the method is simple to operate, convenient construction, does not need special engineering equipment, has stronger practicality and operability; 3, economy: the method can utilize bituminous concrete block when excavating, the raw material as glued layer carry out secondary utilization, decrease the waste of bituminous concrete, have effectively saved investment.
Accompanying drawing explanation
Fig. 1 is the plan view of crack treatment of the present invention.
Fig. 2 is the A-A sectional view of crack treatment of the present invention.
Detailed description of the invention
As shown in Figure 1 and Figure 2, the present embodiment is the method for repairing and mending in the roomy crack of a kind of hydraulic asphalt concrete anti-seepage panel, for guaranteeing the safe, reliable of the roomy crack repairing of asphalt concrete anti-seepage panel, having site operative simultaneously, adopting following form of construction work:
A. raggle and backfill construction: be of a size of two ends, crack according to designing requirement determination raggle 1 and all end at and annihilate 148cm place a little, both sides scope distance between centers of tracks 146cm, then with concrete cutting machine by bituminous concrete stripping and slicing, artificial crowbar prizes the bituminous concrete square (raw material as glued layer 3) cut, and raggle 1 surrounding manually repaiies inclined-plane 2 at 45 ° with drill rod; Excavate drainage blanket 102 material in cut coverage and loaded filter 101 material, the construction quality of draining material, filter material and ground are checked, after inspection no problem, again configuration draining material and filter material is required according to former design grating, manually successively fill design altitude, every layer of 10 ~ 15cm, successively tamps with hand steered vibro-rammer;
B. trough rim finishing: carry out roasting limit by special propane burner, baking temperature controls at about 200 DEG C, bakes while repair smooth-going with spades by 45 ° of inclined-planes 2, meanwhile, roots out destroyed bituminous concrete, exposes the bituminous concrete that original state is fresh;
C. glued layer 3 is constructed: before glued layer 3 is constructed, and is first painted on by mulseal on compacting good drainage blanket 102 surface and 45 ° of inclined-planes 2 equably; Again by 70 DEG C in flow-like bitumastic (pitch: stone flour=1: 2) be painted on 45 ° of inclined-planes 2, scrape evenly with spades; Then the bituminous concrete of temperature 170 ~ 200 DEG C is transported to paving site, glued layer 3 one deck that 8cm is thick has paved, glued layer 3 placement temperature controls at 160 ~ 190 DEG C, hand steered vibro-rammer vibrates 4 ~ 5 times, temperature is at about 160 DEG C, levelling by shake pressure 2 times of vibrating plate again, temperature controls more than 120 DEG C; Glued layer 3 puts in storage while with burner heating tank periphery, again with the hand-held vibrator tamping peripheral seam of heating after glued layer 3 tamping, guarantee that adhesion of new and old concrete is good;
D. impervious barrier 4 is constructed: the bituminous concrete of temperature 170 ~ 190 DEG C is transported to the place that paves, even brushing mulseal in the glued layer surface of new paving, and with burner heating tank periphery.Impervious barrier 4 gross thickness 10cm, points 2 layers pave, and the 1st layer be 5cm, and asphalt concrete material temperature controls at 170 ~ 190 DEG C, and the 1st layer of hand steered vibro-rammer of employing shakes pressure 6 times, and temperature is at about 160 DEG C, and then vibrating plate shakes pressure 2 times, and temperature is greater than 120 DEG C; 2nd layer of paving thickness 5cm, rolls with 2t vibrating roller, and first static pressure shakes for 2 times pressure 6 times again, then static pressure 2 times is levelling, and when rolling, muller will keep moistening;
E. polyester grid 5 is constructed: heat, then with the compacting of hand-held heating vibrator with the cold seam (i.e. seam) of infrared element to bonding surface; Even brushing mulseal, spreads 2 strata fat grids 5, more even brushing mulseal, and polyester grid 5 will keep smooth-going; Polyester graticule 5 is that the one of bituminous concrete steps up material, be a kind of high-strength polyester material, in bituminous concrete, lay polyester graticule, greatly can improve tensile strength, improve the internal stress of bituminous concrete, make the non-deformability of bituminous concrete stronger;
F. thickening layer 6 is constructed: the asphalt concrete material of the thickening layer 6 that paves, the thickness of thickening layer 6 is 5cm, adopt 1 layer to pave, thickening layer 6 end face slightly arches upward radian, so that compacting, its construction method is identical with impervious barrier 4 with material therefor, and overlay thickness is 5cm after guaranteeing compacting, and thickening layer 6 periphery is with using the flanging of heating vibrator after infrared element heating again;
G. confining bed 7 is constructed: bitumastic confining bed 7 thickness is 2mm, the weight ratio of material therefor is pitch: stone flour=30: 70, by asphalt heating to about 120 DEG C, then dry stone flour is slowly added by proportioning, ceaselessly stir while add stone flour limit, until uniform mixing, continue little fire and be heated to 190 DEG C, control this temperature at more than 6h; During job site, with iron spoon, the bitumastic processed is poured on construction part, construction temperature, at 190 DEG C, strikes off with the scraper plate of band rubber tile, one-shot forming and being combined well with former confining bed bitumastic.
Claims (1)
1. the method for repairing and mending in the roomy crack of hydraulic asphalt concrete anti-seepage panel, is primarily characterized in that and comprises the following steps:
A. raggle and backfill construction: according to the scope of designing requirement size determination raggle (1), then with concrete cutting machine by bituminous concrete stripping and slicing, artificial crowbar prizes the bituminous concrete square cut, raggle (1) surrounding manually repaiies inclined-plane at 45 ° (2) with drill rod, excavate drainage blanket (102) material in cut coverage and loaded filter (101) material, to drainage blanket, after the construction quality of loaded filter and ground carry out inspection no problem, again configuration drainage blanket (102) and loaded filter (101) is required according to former design grating, manually successively fill design altitude, every layer of 10 ~ 15cm, successively tamp with hand steered vibro-rammer,
B. trough rim finishing: carry out roasting limit by special propane burner, baking temperature controls at 190 ~ 210 DEG C, bakes while repair smooth-going with spades by 45 ° of inclined-planes (2), simultaneously, root out destroyed bituminous concrete, expose the bituminous concrete that original state is fresh;
C. glued layer (3) construction: before glued layer (3) construction, is painted on the good drainage blanket of compacting (102) surface and 45 ° of inclined-planes (2) equably by mulseal; By 70 DEG C in flow-like pitch: stone flour=1: the bitumastic of 2 is painted on 45 ° of inclined-planes (2), scrapes evenly with spades; The bituminous concrete of temperature 170 ~ 200 DEG C is transported to paving site, glued layer (3) one deck that 8cm is thick has paved, glued layer (3) placement temperature is 160 ~ 190 DEG C, hand steered vibro-rammer vibrates 4 ~ 5 times, temperature controls at 160 ± 10 DEG C, levelling by shake pressure 2 times of vibrating plate again, temperature controls at 120 ~ 130 DEG C; Glued layer (3) puts in storage while heat raggle (1) periphery with burner, again with the hand-held vibrator tamping peripheral seam of heating after glued layer (3) tamping, guarantees that adhesion of new and old concrete is good;
D. impervious barrier (4) construction: the bituminous concrete of temperature 170 ~ 190 DEG C is transported to the place that paves, first evenly brushing mulseal is surperficial in the glued layer (3) of new paving, and heat raggle (1) periphery with burner, impervious barrier (4) gross thickness 10cm, divide 2 layers to pave, 1st layer is 5cm, asphalt concrete material temperature controls at 170 ~ 190 DEG C, 1st layer adopts hand steered vibro-rammer to shake pressure 6 times, temperature controls at 160 ± 10 DEG C, then vibrating plate shakes pressure 2 times, and temperature controls at 120 ~ 130 DEG C; 2nd layer of paving thickness 5cm, rolls with 2t vibrating roller, and first static pressure shakes for 2 times pressure 6 times again, then static pressure 2 times is levelling, and when rolling, muller will keep moistening;
E. polyester grid (5) construction: heat with the cold seam of infrared element to bonding surface, then with the compacting of hand-held heating vibrator, even brushing mulseal, spreads 2 strata fat grids (5), even brushing mulseal again, polyester grid will keep smooth-going;
F. thickening layer (6) construction: the asphalt concrete material of the thickening layer that paves (6), the thickness of thickening layer (6) is 5cm, adopt 1 layer to pave, thickening layer end face slightly arches upward radian, so that compacting, its construction method and the same impervious barrier of material therefor (4), overlay thickness is 5cm after guaranteeing compacting, and thickening layer (6) periphery is with using the flanging of heating vibrator after infrared element heating again;
G. confining bed (7) construction: bitumastic confining bed (7) thickness is 2mm, material therefor weight ratio is pitch: stone flour=30: 70, by asphalt heating to 120 ± 10 DEG C, then dry stone flour is slowly added by proportioning, ceaselessly stir while add stone flour limit, until uniform mixing, continue little fire and be heated to 190 DEG C, control this temperature at more than 6h; During job site, with iron spoon, the bitumastic processed is poured on construction part, construction temperature, at 190 DEG C, strikes off with the scraper plate of band rubber tile, one-shot forming and being combined well with former confining bed bitumastic.
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| CN201510005803.0A CN104674763A (en) | 2015-01-06 | 2015-01-06 | Method for repairing wide and large cracks of hydraulic engineering bituminous concrete impervious face slab |
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| CN201510005803.0A CN104674763A (en) | 2015-01-06 | 2015-01-06 | Method for repairing wide and large cracks of hydraulic engineering bituminous concrete impervious face slab |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112982300A (en) * | 2021-02-01 | 2021-06-18 | 中国电建集团华东勘测设计研究院有限公司 | Seepage-proofing and drainage connecting structure for asphalt concrete face plate of reservoir bank and geomembrane at reservoir bottom and construction method |
| CN114775530A (en) * | 2022-05-06 | 2022-07-22 | 重庆交通大学 | Pumped storage upper reservoir dry-wet circulation lower heat insulation seepage-proofing reservoir bank structure and construction method thereof |
| CN115404820A (en) * | 2022-09-05 | 2022-11-29 | 中国电建集团华东勘测设计研究院有限公司 | Asphalt concrete panel rock-fill dam arrangement structure and construction method |
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| CN101078209A (en) * | 2006-05-26 | 2007-11-28 | 中国水利水电科学研究院 | Cold construction seal coat for asphalt concrete anti-seepage panel and construction technique thereof |
| CN103643656A (en) * | 2013-11-22 | 2014-03-19 | 河海大学 | High rock-fill dam membrane anti-seepage body on deep coverage layer and construction method of high rock-fill dam membrane anti-seepage body |
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Patent Citations (3)
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| CN101078209A (en) * | 2006-05-26 | 2007-11-28 | 中国水利水电科学研究院 | Cold construction seal coat for asphalt concrete anti-seepage panel and construction technique thereof |
| CN103643656A (en) * | 2013-11-22 | 2014-03-19 | 河海大学 | High rock-fill dam membrane anti-seepage body on deep coverage layer and construction method of high rock-fill dam membrane anti-seepage body |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112982300A (en) * | 2021-02-01 | 2021-06-18 | 中国电建集团华东勘测设计研究院有限公司 | Seepage-proofing and drainage connecting structure for asphalt concrete face plate of reservoir bank and geomembrane at reservoir bottom and construction method |
| CN112982300B (en) * | 2021-02-01 | 2022-06-14 | 中国电建集团华东勘测设计研究院有限公司 | Seepage-proofing and drainage connecting structure for bank asphalt concrete panel and reservoir bottom geomembrane and construction method |
| CN114775530A (en) * | 2022-05-06 | 2022-07-22 | 重庆交通大学 | Pumped storage upper reservoir dry-wet circulation lower heat insulation seepage-proofing reservoir bank structure and construction method thereof |
| CN115404820A (en) * | 2022-09-05 | 2022-11-29 | 中国电建集团华东勘测设计研究院有限公司 | Asphalt concrete panel rock-fill dam arrangement structure and construction method |
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