CN102505701B - Self-compaction mortar and deep hole curtain pouring construction method - Google Patents
Self-compaction mortar and deep hole curtain pouring construction method Download PDFInfo
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Abstract
The invention discloses a self-compaction mortar and a deep hole curtain pouring construction method. The deep hole curtain pouring construction method comprises the following steps of: preparing for construction, drilling a hole, detecting the drilled hole, pouring, finishing pouring, checking the pouring effect and sealing the drilled hole. The self-compaction mortar utilized in the construction comprises the following components in parts by weight: 0.52-0.94 parts of water, 1 part of cement, 0-0.55 parts of fly ash, 2.83-4.89 parts of sand, and 0.01-0.03 parts of admixture, wherein the admixture consists of 1 part of melamine, 0.2-0.6 parts of polyacrylamide anti-washout admixture, 0.1-0.5 parts of UWB-II type anti-washout admixture and 0.05-0.15 parts of flocculating agent. The self-compaction mortar and the deep hole curtain pouring construction method disclosed by the invention are suitable for different geological conditions; the self-compaction mortar is low in cement content and small in hydration temperature rise; a temperature control measure can be simplified and even omitted; gaps of crushed zones can be fully filled without vibrating the mortar; diffusivity of 600mm does not cause segregation and exudation; and in addition, the deep hole curtain pouring construction method has the advantages of simple and effective construction management, constant standard, strong operability, reduced human intervention, and more easily ensured construction quality and stability.
Description
Technical field
The invention belongs to building anti-seepage construction method field, especially belong to deep hole curtain antiseep pouring construction method field, particularly adopt self-compacting mortar to carry out deep hole curtain pouring construction technology and self-compacting mortar combination
Background technology
In existing heavy construction construction, anti-seepage construction is important construction content.The perfusion of curtain antiseep is the method often adopting, and curtain antiseep pouring construction generally has the slurry material perfusions such as the perfusion of neat slurry static pressure, two-shot grouting, cement cream slurry and ordinary mortar.
Static pressure grouting: generally serious at stratum cranny development, the Fracture Width that is stratum is large, compared with broken formation, and have in the stratum of water and carry out static pressure grouting, static pressure grouting control is poor, cement unit consumption large, treat that the solidifying time is long, especially can not be according to returning slurry or having the standard of pressure to finish, and while adopting quantitative standard to finish, the evaluation of its effect, reliability etc. are difficult to determine to be controlled.In existing research, show, under water, especially moving water condition needs more than 10 hours lower time of setting Portland cement, and false set or coagulation phenomena not even occur.
Two-shot grouting: adopt two-shot grouting, as cement-sodium silicate, controlled grouting etc., when carrying out deep hole Curtain Grouting Construction (the dark 145m of deep hole), easily there is plug-hole accident, and the bad evaluation of performance and the controls such as the setting time of its range of scatter, slurries, non-hydrophily, therefore in work progress, its effect assessment and reliability etc. are difficult to determine.
Cement cream slurry: because cement cream slurry slurries (containing rapid hardening cream slurry) have its specific scope of application, as the hole array pitch of cream slurry is determined according to on-the-spot strata condition, because the yield strength of cream slurry is larger, so its range of scatter is subject to certain constraint, therefore hole array pitch is less than the hole array pitch of cementation.For further improving grouting effect, can in the middle of two row's cream slurry grout holes, a draining mud grout hole be set, but cannot meet the demands for control indexs such as the anti-seepage standard requiring in this type of stratum, compressive strength, freeze proof, initial setting time and degree of mobilization.
Ordinary mortar: adopt mortar injection in a compresso-crushed zone stratum, but do not solve under water setting time length, slurries range of scatter, the effective problem such as curtain anti-seepage effect, especially its grouting effect is poorer under water moving.
Self-compacting mortar has high fluidity, does not emanate, durability, uniformity and stability, without vibrating pressurization, reach closely knit mortar performance, the crack diffusance difference to rock stratum from close mix ratio of mortar of variable concentrations, existing application in existing every building operations.
Self-compacting mortar composition and proportioning difference are large, according to different building operations, want condition for peace to have larger difference, this be also self-compacting mortar and job practices thereof always in probing into, developing reason.At large-scale constructions such as power plant dams, the strengthening constructions such as antiseep, as in deep hole Curtain Grouting Construction always all finding that a kind of cost is low, easy construction, environmentally friendly etc. have dominance more can grouting agent and job practices thereof.Self-compacting mortar is a kind of grouting agent of excellence, but for deep hole Curtain Grouting Construction, particularly the deep hole curtain grouting for different cracks does not also have suitable self-compacting mortar and job practices thereof.
Summary of the invention
The present invention discloses a kind of self-compacting mortar and deep hole curtain pouring construction method thereof according to the deficiencies in the prior art, the problem to be solved in the present invention is to provide a kind of self-compacting mortar combination that various cracks require that is applicable to, and another problem that the present invention will solve is to provide and adopts above-mentioned self-compacting mortar to carry out the process of deep hole curtain pouring construction.
The present invention is achieved through the following technical solutions:
Self-compacting mortar deep hole curtain pouring construction method, is characterized in that comprising the following steps:
A, preparation of construction, comprise and carry out position, hole setting-out accurately;
B, boring, adopt leading concentric bore, holes piecemeal from top to bottom, and Piecemeal erection packer pours into, until at the bottom of hole, boring aperture >=φ 76mm, segment length 2～5m;
C, boring detect, comprise TV in hole deviation measurement, packer permeability test and hole, after every section of boring completes, boring hole deviation is measured, then hole section is carried out to packer permeability test, collect data, after packer permeability test finishes, treat clarification of water in hole, by crack developmental state in TV peep hole in hole, determine mix ratio of mortar;
D, perfusion, hocket with drilling construction, and every section of boring is complete, according to every section of boring testing result, determines pouring material; Water hole is returned in boring, adopts grout pouring, and boring, without returning water hole, adopts self-compacting mortar perfusion;
E, perfusion finish, and every section of perfusion mortar, to aperture, stops perfusion, carries out cleaning bottom of hole, and fill with rear setting-out after solidifying 4 hours, when setting-out reaches standard, carries out hypomere construction; When setting-out does not reach check criteria, proceed mortar injection, until reach ending standard;
F, perfusion effect inspection, has poured in full hole, treats solidifying 14 days, by TV in sonic detection and/or hole after boring and coring, segmentation packer permeability test, filling, perfusion effect is checked;
G, sealing of hole, after the perfusion effect passed examination of full hole, adopt full hole grout pouring sealing of hole, and it is floating that sealing of hole perfusion finishes rear aperture.
While adopting self-compacting mortar perfusion in further described d step, according to the TV judgement section of portalling crack size in hole, select corresponding self-compacting mortar proportioning and reperfusion mode, large crack adopts permeability mode to pour into, and rimala adopts controlled grout pump to push controlled perfusion.
While adopting permeability perfusion, fill with mortar in hole,, mortar face maintenance 5min does not decline or mortar falling head≤1cm/min can finish slip casting in the hole in; While adopting extruding controlled perfusion, when reaching after design pressure keeps 5min, aperture pressure can finish perfusion.
The self-compacting mortar that the present invention adopts comprises the component of following parts by weight:
Water: 0.52～0.94 part;
Cement: 1 part;
Flyash: 0～0.55 part;
Sand: 2.83～4.89 parts;
Admixture: 0.01～0.03 part;
Wherein Admixture is comprised of the component of following parts by weight: melamine: 1 part; Polyacrylamide is dispersing agent not efficiently: 0.2～0.6 part; UWB-II type is dispersing agent not under water: 0.1～0.5 part; Flocculant: 0.05～0.15 part.
Further after the position setting-out of described hole, can first close the door hole drilling and perfusion, then carry out centre curtain hole drilling and perfusion.
The position setting-out of described hole is to close aperture of door array pitch 3.0m, pitch-row 0.75m; Middle curtain hole is double, array pitch 1.0m, pitch-row 1.5m; Pass aperture of door and the dislocation of middle curtain hole arrange that formation is quincunx, close aperture of door and middle curtain hole array pitch 1.0m.
Another kind of hole position setting-out is to close aperture of door array pitch 3.0m, pitch-row 0.75m; Middle curtain hole is single, pitch-row 1.5m; Pass aperture of door and the dislocation of middle curtain hole arrange that formation is quincunx, close aperture of door and middle curtain hole array pitch 1.5m.
Further, hole piecemeal from top to bottom, can adopt first paragraph segment length is 2m, and second segment segment length is 3m, and the 3rd section of segment length that each segment length is 5m later carries out.
Further described boring detection is according to TV in packer permeability test and hole, boring to be divided into: a, groundwater table are with epimere, b, groundwater table are with hypomere, c, rimala section: 1mm≤Fracture Width < 2mm, d, common crack section: 2mm≤Fracture Width < 10mm, e, large crack section: 10mm≤Fracture Width.The all types of holes of described a, b, c, d or e section is corresponding respectively uses self-compacting mortar 1,2,3,4 or No. 5.As shown in table 1:
Table 1 is adapted to the mortar weight ratio in different cracks
The pioneering above-mentioned self-compacting mortar of the present invention and deep hole curtain pouring construction method thereof.By detecting different geological conditions, provide the self-compacting mortar of various combination and job practices to realize pouring construction.Tool of the present invention has the following advantages:
(1) self-compacting mortar integrated cost significantly reduces compared with conventional slurry, and reduced rate can reach 15-30%.
(2) without the operation of vibrating, mortar is controlled oneself and can be filled the space of full zone of fracture, and the diffusance of 600mm is not also emanated, bleeding not, site construction management measure is simply effective, and control criterion is fixed, workable, reduce human intervention, construction quality and stability more easily guarantee.
(3) construction technology is simple, can significantly improve the efficiency of construction of mortar, effectively the reduction of erection time, creates economic benefit.
(4) self-compacting mortar cement factor is low, and hydration temperature rises little, can greatly simplify, and even cancels temperature control measures.
(5) self-compacting mortar cement consumption significantly reduces, and belongs to environmental friendliness engineering, and energy-saving and emission-reduction benefit is obvious.
Accompanying drawing explanation
Fig. 1 is a kind of layout schematic diagram of position, hole setting-out;
Fig. 2 is the another kind of schematic diagram of arranging of position, hole setting-out.
In figure, the 1st, close aperture of door, 1a closes aperture of door row axis, and the 2nd, middle curtain hole, 2a is middle curtain hole row's axis.
The specific embodiment
Below in conjunction with the specific embodiment, the present invention is further described, and the specific embodiment is to the further illustrating of the principle of the invention, and does not limit the present invention in any way, or similar techniques identical with the present invention all do not exceed the scope of protection of the invention.
Embodiment 1
Self-compacting mortar preparation: according to different self-compacting mortar ratio requirement preparations, self-compacting mortar manufacturing process comprises: the preparation that (1) should do before producing: 1. select good self-compacting mortar match ratio, and carry out corresponding raw material preparation; 2. before self-compacting mortar production, reply raw material detect, and understand moisture content and the fineness modulus of sand.3. guarantee that the water in transportation tank car drains, will note in transit stirring.(2) points for attention in manufacturing process: 1. the stirring of self-compacting mortar is sequentially: by load weighted Sha with Rubber gel material Fen Do drops into mixer dry mixing, the mixer dry mixing time is not less than 10 seconds, after adding water and Admixture, continue to stir more than 60 seconds, temperature during lower than 15 ℃ mixing time should be not less than 120 seconds, self-compacting mortar working performance goes out machine after reaching requirement.While 2. needing to add water in process of production, the amplitude maximum value that single is added water is no more than 5kg.3. if there is because the water yield adds too much, mortar state does not reach out confidential asking, can be appropriate add some cement, single is added cement maximum value and is no more than 20kg. and 4. regularly to producing, with sand, inspects by random samples, fineness modulus variation should be no more than 0.2 as requested.
Admixture preparation; In described Admixture each component ratio, add successively efficiently dispersing agent, UWB-II type not dispersing agent and flocculant under water not of melamine, polyacrylamide; In container, artificial or mixing device stirs; Admixture adds remaining part at twice after can first adding by 80% of total amount in self-compacting mortar preparation process in whipping process.
After preparing self-compacting mortar, detect, and contrast with cement paste and ordinary mortar testing result, testing result is in Table 2.
Table 2 cement paste, ordinary mortar and the contrast of self-compacting mortar performance indications
| Sequence number | Performance parameter | Cement paste | Ordinary mortar | Self-compacting mortar |
| 1 | Initial setting time (min) | 121 | 210 | 240 |
| 2 | Final setting time (min) | 180 | 270 | 460 |
| 3 | 3 days compressive strength (MPa) | 25.1 | 1.96 | 2.1 |
| 4 | 7 days compressive strength (MPa) | 28.3 | 5.69 | 5.6 |
| 5 | 28 days compressive strength (MPa) | 28.3 | 32.7 | 35.5 |
| 6 | Density (g/cm3) | 1.83 | 2.35 | 1.94-1.97 |
| 7 | Viscosity (s) | 51.2 | VF=10-60 | VF=5-40 |
| 8 | Bleed rate (%) | 2.3 | 3 | / |
| 9 | Diffusance (cm) | ≤600 | ≤150 | ≤600 |
| 10 | Hydrophilicity whether | Hydrophily | Hydrophily | Non-hydrophily |
In table 2: can show that self-compacting mortar has the following advantages.
(1) initial setting time of self-compacting mortar, final setting time longer than the time of setting of cement paste and ordinary mortar, like this can be for self-compacting mortar filling process increases the controlled adjustment time, so that slurries fully spread.
(2) the self-compacting mortar compressive strength rate cement paste of 28 days, the mortar compressive strength of 28 days are corresponding larger, can better guarantee that impervious system is not breakdown, occur weak spot.
(3) diffusance of self-compacting mortar is larger, can make to starch material and fully be spread in the crack on stratum.
(4) self-compacting mortar has non-hydrophily, and during underwater perfusion, grouting agent performance and proportioning are difficult for destroyed quality and can be guaranteed.
Embodiment 2
Carry out according to the following steps self-compacting mortar deep hole Curtain Grouting Construction:
A, preparation of construction: comprise that construction framed bent is set up, geomantic omen electric system is arranged, drainage is arranged, the contents such as layout of grouting pipeline.Comprise according to position, curtain grouting hole parameter and carry out position, hole setting-out accurately; The setting-out of position, hole can have two kinds of arrangements, as shown in Figure 2, the one, close aperture of door array pitch 3.0m, pitch-row 0.75m; Middle curtain hole is double, array pitch 1.0m, pitch-row 1.5m; Pass aperture of door and the dislocation of middle curtain hole arrange that formation is quincunx, close aperture of door and middle curtain hole array pitch 1.0m; As shown in Figure 1, another layout is to close aperture of door array pitch 3.0m, pitch-row 0.75m; Middle curtain hole is single, pitch-row 1.5m; Pass aperture of door and the dislocation of middle curtain hole arrange that formation is quincunx, close aperture of door and middle curtain hole array pitch 1.5m.
B, drilling construction: adopt leading concentric bore, subsection hole-drilling from top to bottom, boring aperture >=φ 76mm; Leading concentric bore is before grouting, for ease of understanding in advance geological conditions, adopt XY-2 type geological drilling rig to carry out concentric Rotary drilling, to judge in advance crack situation in hole according to situations such as TVs in boring situation, setting-out situation, hole, to instruct subsequent processing construction.Hole piecemeal from top to bottom, can adopt first paragraph segment length is 2m, and second segment segment length is 3m, and the 3rd section of segment length that each segment length is 5m later carries out.
C, hole deviation measure and packer permeability test: hole and rear boring hole deviation has been measured, then hole section has been carried out to packer permeability test, collection data;
Hole deviation measurement is to understand hole deviation situation, is convenient to timely correction.In the boring procedure of curtain, by deviational survey, understand at any time the situation of hole scattering.If hole scattering has surpassed allowed band, analyze its Reasons of skews, take appropriate measures, correct in time, just later boring can be crept into according to the boring direction of design, to guarantee to hole, final deviation proportion does not exceed permissible value scope.
Packer permeability test: by packer permeability test, Lu's capacitance of the compressed water section on known this stratum size, the size of setting-out flow, can tentatively judge the Fracture Width on stratum etc. like this, and the water/binder ratio of the grouting of subsequent processing, cement paste are self-compacting mortar consumption etc.
TV in d, hole: after packer permeability test finishes, treat the clarification of water in hole, by crack developmental state in TV peep hole in hole, eye slit developmental state, determines mix ratio of mortar; In hole, TV test section needs setting-out, grouting, in test process, can intuitively see and need the rock stratum of setting-out, grout compartment situation and just sentence Fracture Width, then by specialty analysis software, accurately draw the crack size cases of this filling section, then according to Fracture Width, select suitable cement grout proportioning and cement mortar ratio, instruct subsequent processing construction.Be conducive to like this select suitable cement grout proportioning and self-compacting mortar proportioning according to Fracture Width.
E, grouting are prepared: according to c step and d step results, carry out before fill with in mortar mixing, transportation and aperture preparing; According to TV in packer permeability test and hole, boring is divided into: 1, groundwater table is with epimere, 2, groundwater table is with hypomere, 3, rimala section: 1mm≤Fracture Width < 2mm, 4, common crack section: 2mm≤Fracture Width < 10mm, 5, large crack section: 10mm≤Fracture Width.Described 1,2,3,4 and 5 all types of holes sections are corresponding respectively uses self-compacting mortar 1,2,3,4 or No. 5.As shown in Table 1.
F, grouting: water hole is returned in boring, adopt cementation, and boring, without returning water hole, adopts self-compacting mortar grouting; While adopting self-compacting mortar grouting, according to the TV judgement section of portalling crack size in hole, select corresponding cement mortar ratio and grouting way, large crack adopts permeability mode to pour into, and rimala adopts controlled grout pump to push controlled grouting;
G, grouting finish: while adopting permeability perfusion, while filling with mortar in hole, in the hole in mortar face maintenance 5min do not decline or hole in mortar falling head≤1cm/min can finish slip casting; While adopting the controlled grouting of extruding, when reaching after design pressure keeps 5min, aperture pressure can finish grouting;
When mortar is filled with to aperture, stop grouting, and water rinses aperture, top to hole depth 2m position, grouting end; After solidifying 4 hours, carry out cleaning bottom of hole, after cleaning bottom of hole, carry out packer permeability test, when packer permeability test reaches the following permeability rate of reservoir area level of dead water, be not more than 3Lu, it is standard that level of dead water is not more than 5Lu above, permeability rate computational methods: q=Q/(L*P), q represents permeability rate (Lu), and Q represents setting-out flow (L/min), and L represents setting-out segment length (m), P setting-out pressure (MPa), and fill with rear setting-out, when setting-out reaches check criteria, carry out hypomere construction; When setting-out does not reach check criteria, proceed mortar injection, until reach ending standard; After grouting finishes, check, its check criteria is: the quantity of curtain inspection eye is 10% of curtain grouting hole number, and level of dead water following permeability rate in reservoir area is not more than 3Lu, and it is qualified that the above permeability rate of level of dead water is not more than 5Lu.Concrete and basement rock contact-segment setting-out qualification rate reach 100%, and the qualification rate of the total hop count of setting-out should reach more than 90%, and the permeability rate of all the other less than 10% grout compartments is not more than 8Lu, and do not concentrate and can think qualified, otherwise should discuss processing scheme by managing, design, constructing.
H, grouting effect inspection sealing of hole: full hole mortar injection completes, treat solidifying 14 days, adopts by TV in sonic detection and/or hole after boring and coring, segmentation packer permeability test, filling grouting effect is checked; After the grouting of full hole finishes, adopt full hole grout pouring sealing of hole, it is floating that sealing of hole perfusion finishes rear aperture.
Adopt above-mentioned self-compacting mortar and deep hole Curtain Grouting Construction method thereof in the construction of some hydropower station foundation treatment engineering, this project belongs to severe cold areas (more than 3100 meter above sea level, the extreme lowest temperature-15.6 ℃, maximum wind velocity 20.7m/s).Engineering Curtain Grouting Construction watertight grouting axis is about 1050m, engineering quantity approximately 25 myriametres, maximum hole depth 145m, there is below underground water in average hole depth 50m, this stratum belongs to stretch-draw type fractured rock, and its geological conditions at home and abroad belongs to first and exploring for the antiseepage of dam foundation curtain.Intend reaching by grouting constructions such as straight cement slurries, mortar and controlled slurries the curtain anti-seepage standard (≤3Lu) of designing requirement early stage, but cement unit consumption amount is large, investment is higher, the duration is long, anti-seepage effect is undesirable, for saving investment, shorten the construction period, we at this point adopt curtain Seepage Prevention Mechanism of the present invention, self-compacting mortar to coordinate when construction technology to obtain very good effect in layer, reach the curtain anti-seepage standard of designing requirement: permeability rate≤3Lu.Some hydropower station foundation treatment engineering part curtain grouting hole data below:
1, fill with front Lv Rong Data-Statistics
According to pre-stage test result, the mortar of trial zone and cement paste are filled with front Lv Rong Data-Statistics and are seen the following form 3.
Table 3
2, mortar, grout pouring statistical effect
Trial zone self-compacting mortar and grout pouring statistical effect see the following form 4.
Table 4
3, after self-compacting mortar perfusion, inspection eye the results are shown in following table 5
Table 5
By upper table 3, table 4, table 5, can draw:
(1) in upper table 3, before self-compacting mortar perfusion, scheme is poured into altogether 79 sections times, and scheme two is poured into 111 sections times altogether, and before filling with, the result of setting-out is all ∝, and crushing rock formation, cranny development are described; After self-compacting mortar perfusion, before neat slurry perfusion, setting-out before we have adopted again neat slurry to fill with (self-compacting mortar is filled with rear setting-out), can draw, it is interval that the maximum interval of permeability rate of scheme one, scheme two has become 10～100Lu from ∝, hence one can see that, and self-compacting mortar has carried out effective filling to the crack in rock stratum, and geological condition has obtained larger improvement.
(2) by upper table 4, we can find out that self-compacting mortar concrete castability is good, mortar unit consumption average out to 148L/m; After self-compacting mortar perfusion, then adopt the average quantity used in unit volume blasted of grout pouring lower (for 318kg/m), it can be said that brightly, first pour into after self-compacting mortar, then adopt the job practices of neat slurry perfusion can reduce cement unit consumption.
(3) by known in upper table 5, the permeability rate of check result meets design requirement completely, be that scheme one, scheme two are poured into according to self-compacting mortar, the job practices of rear employing grout pouring completes after Curtain Grouting Construction, and its setting-out check result meets design requirement.In addition, the permeability rate of inspection eye interval is 0.5Lu～6.8Lu, and comprehensive average Lv Rong value is 3.26Lu, meets design anti-seepage standard.
Claims (9)
1. a self-compacting mortar deep hole curtain pouring construction method, is characterized in that comprising the following steps:
A, preparation of construction, comprise and carry out position, hole setting-out accurately;
B, boring, adopt leading concentric bore, holes piecemeal from top to bottom, and Piecemeal erection packer pours into, until at the bottom of hole, boring aperture >=φ 76mm, segment length 2～5m;
C, boring detect, comprise TV in hole deviation measurement, packer permeability test and hole, after every section of boring completes, boring hole deviation is measured, then hole section is carried out to packer permeability test, collect data, after packer permeability test finishes, treat clarification of water in hole, by crack developmental state in TV peep hole in hole, determine mix ratio of mortar;
D, perfusion, hocket with drilling construction, and every section of boring is complete, according to every section of boring testing result, determines pouring material; Water hole is returned in boring, adopts grout pouring, and boring, without returning water hole, adopts self-compacting mortar perfusion;
E, perfusion finish, and every section of perfusion mortar, to aperture, stops perfusion, carries out cleaning bottom of hole, and fill with rear setting-out after solidifying 4 hours, when setting-out reaches standard, carries out hypomere construction; When setting-out does not reach check criteria, proceed mortar injection, until reach ending standard;
F, perfusion effect inspection, has poured in full hole, treats solidifying 14 days, by TV in sonic detection and/or hole after boring and coring, segmentation packer permeability test, filling, perfusion effect is checked;
G, sealing of hole, after the perfusion effect passed examination of full hole, adopt full hole grout pouring sealing of hole, and it is floating that sealing of hole perfusion finishes rear aperture;
Described self-compacting mortar comprises the component of following parts by weight:
Water: 0.52～0.94 part;
Cement: 1 part;
Flyash: 0～0.55 part;
Sand: 2.83～4.89 parts;
Admixture: 0.01～0.03 part;
Wherein Admixture is comprised of the component of following parts by weight: melamine: 1 part; Polyacrylamide is dispersing agent not efficiently: 0.2～0.6 part; UWB-II type is dispersing agent not under water: 0.1～0.5 part; Flocculant: 0.05～0.15 part.
2. self-compacting mortar deep hole curtain pouring construction method according to claim 1, it is characterized in that: while adopting self-compacting mortar perfusion in described d step, according to the TV judgement section of portalling crack size in hole, select corresponding self-compacting mortar proportioning and reperfusion mode, large crack adopts permeability mode to pour into, and rimala adopts controlled grout pump to push controlled perfusion.
3. self-compacting mortar deep hole curtain pouring construction method according to claim 2, is characterized in that: during described employing permeability perfusion, fill with mortar in hole,, mortar face maintenance 5min does not decline or mortar falling head≤1cm/min can finish slip casting in the hole in; While adopting extruding controlled perfusion, when reaching after design pressure keeps 5min, aperture pressure can finish perfusion.
4. according to self-compacting mortar deep hole curtain pouring construction method described in claim 1,2 or 3, it is characterized in that: after the position setting-out of described hole, first close the door hole drilling and perfusion, then carry out centre curtain hole drilling and perfusion.
5. according to self-compacting mortar deep hole curtain pouring construction method described in claim 1,2 or 3, it is characterized in that: the position setting-out of described hole is to close aperture of door array pitch 3.0m, pitch-row 0.75m～1.0m; Middle curtain hole is double, array pitch 1.0m, pitch-row 1.5m; Pass aperture of door and the dislocation of middle curtain hole arrange that formation is quincunx, close aperture of door and middle curtain hole array pitch 1.0m.
6. according to self-compacting mortar deep hole curtain pouring construction method described in claim 1,2 or 3, it is characterized in that: the position setting-out of described hole is to close aperture of door array pitch 3.0m, pitch-row 0.75m～1.0m; Middle curtain hole is single, pitch-row 1.5m; Pass aperture of door and the dislocation of middle curtain hole arrange that formation is quincunx, close aperture of door and middle curtain hole array pitch 1.5m.
7. according to self-compacting mortar deep hole curtain pouring construction method described in claim 1,2 or 3, it is characterized in that: describedly hole piecemeal from top to bottom, first paragraph segment length is 2m, and second segment segment length is 3m, each segment length is 5m after the 3rd section.
8. according to self-compacting mortar deep hole curtain pouring construction method described in claim 1,2 or 3,1), groundwater table is with epimere it is characterized in that: it is according to TV in packer permeability test and hole, boring to be divided into that described boring detects:, 2), groundwater table is with hypomere, 3), rimala section: 1mm≤Fracture Width < 2mm, 4), common crack section: 2mm≤Fracture Width < 10mm, 5), large crack section: 10mm≤Fracture Width.
9. self-compacting mortar deep hole curtain pouring construction method according to claim 8, is characterized in that:
Described 1) type hole section is corresponding uses self-compacting mortar No. 1, consists of water 248 weight portions, cement 405 weight portions, sand 1282 weight portions and Admixture 4.73 weight portions;
Described 2) type hole section is corresponding uses self-compacting mortar No. 2, consists of water 234 weight portions, cement 452 weight portions, sand 1280 weight portions and Admixture 5.56 weight portions;
Described 3) type hole section is corresponding uses self-compacting mortar No. 3, consists of water 249 weight portions, cement 405 weight portions, sand 1282 weight portions and Admixture 6.16 weight portions;
Described 4) type hole section is corresponding uses self-compacting mortar No. 4, consists of water 247 weight portions, cement 262 weight portions, flyash 144 weight portions, sand 1282 weight portions and Admixture 6.01 weight portions;
Described 5) type hole section is corresponding uses self-compacting mortar No. 5, consists of water 233 weight portions, cement 288 weight portions, flyash 158 weight portions, sand 1282 weight portions and Admixture 7.75 weight portions.
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| CN106869132A (en) * | 2017-02-22 | 2017-06-20 | 中国水利水电第九工程局有限公司 | A kind of upper uphole Curtain Grouting Construction method |
| CN108301398B (en) * | 2018-01-23 | 2019-12-24 | 山东大学 | TRD continuous wall quality evaluation method |
| CN109881695A (en) * | 2019-01-15 | 2019-06-14 | 北京国电水利电力工程有限公司 | The drilling cleaning method of cultural relic protection project rock mass impervious grouting |
| CN111287145A (en) * | 2020-02-25 | 2020-06-16 | 水利部交通运输部国家能源局南京水利科学研究院 | Biological anti-seepage method for large-flow-rate centralized leakage |
| CN112459010A (en) * | 2020-11-02 | 2021-03-09 | 张甜甜 | Hydraulic engineering concrete dam leakage-repairing reinforcing grouting method |
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