CN104141314B - The method of complete seepage proof curtain is formed in rock, native two media - Google Patents
The method of complete seepage proof curtain is formed in rock, native two media Download PDFInfo
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- CN104141314B CN104141314B CN201410382317.6A CN201410382317A CN104141314B CN 104141314 B CN104141314 B CN 104141314B CN 201410382317 A CN201410382317 A CN 201410382317A CN 104141314 B CN104141314 B CN 104141314B
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- 239000011435 rock Substances 0.000 title claims abstract description 108
- 238000000034 method Methods 0.000 title claims abstract description 32
- 239000002689 soil Substances 0.000 claims abstract description 67
- 238000010276 construction Methods 0.000 claims abstract description 25
- 239000007921 spray Substances 0.000 claims abstract description 22
- 238000013461 design Methods 0.000 claims abstract description 14
- 238000003756 stirring Methods 0.000 claims abstract description 13
- 241001074085 Scophthalmus aquosus Species 0.000 claims abstract description 3
- 230000005540 biological transmission Effects 0.000 claims description 7
- 230000003068 static effect Effects 0.000 claims description 6
- 230000036541 health Effects 0.000 claims description 4
- 230000001143 conditioned effect Effects 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 230000002265 prevention Effects 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 11
- 230000007613 environmental effect Effects 0.000 abstract description 5
- 238000005065 mining Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 6
- 230000008595 infiltration Effects 0.000 description 6
- 238000001764 infiltration Methods 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 5
- 239000002002 slurry Substances 0.000 description 4
- 239000004568 cement Substances 0.000 description 3
- 239000000356 contaminant Substances 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000007569 slipcasting Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 239000011440 grout Substances 0.000 description 2
- 238000003306 harvesting Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- -1 grating Substances 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 238000009439 industrial construction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 210000002706 plastid Anatomy 0.000 description 1
- 239000004848 polyfunctional curative Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
The invention discloses a kind of method forming complete seepage proof curtain in rock, native two media, carry out height spray stake or deeply stir pile driving construction forming upper soil horizon seepage proof curtain body of wall (3) at upper soil horizon; The pitch-row of rock mass curtain-grouting design, hole depth brill curtain-grouting hole, rock stratum (2) is pressed to impermeable rock stratum at the top of established upper soil horizon seepage proof curtain body of wall (3); Injected hole stop grouting plug (4) is enclosed within rock stratum curtain-grouting pipe (1), and be inserted in curtain-grouting hole, rock stratum (2), and by rock stratum curtain-grouting pipe (1), curtain-grouting work is completed by grouting in rock mass code requirement, thus in rock stratum, bottom, form the waterproof curtain wall in rock stratum, bottom (5), finally form the complete vertical grouting curtain wall from soil layer to rock stratum.The seepage proof curtain adopting the inventive method to construct effectively can prevent underground water streaming in rock stratum, bottom, earth's surface, and quality of wall meets current mining area, the environmental requirement of plant area completely, and speed of application is fast, expense is low.
Description
Technical field
The present invention relates to a kind of construction method of seepage proof curtain, especially relate to the method building complete vertical grouting curtain wall in rock, native two media, be applicable to higher to vertical seepage control requirement, do not allow to produce that underground is streamed, vertical grouting curtain engineering under upper soil under rock (rock mass containing fragmented rock body, severely-weathered, middle weathering) engineering geological conditions.
Background technology
Soil is the deposit of discrete particles, is the medium with continuous hole.Rock mass is the plastid naturally in certain works limit, through various geological movement, inner containing structure and crack.Because both physico-mechanical propertieses are different, penetration mechanism Hui Yi, when needing to apply vertical grouting curtain in soil, rock stratum at complicated, narrow and small place, in view of soil, the different physico-mechanical propertieses of rock and different Seepage technique cannot be taken into account, often can only carry out the soil layer seepage proof curtain construction of individual event, and cannot designing requirement be reached.
Along with Environmental protection pay attention to day by day; also more strict to the control of run, drip, leak in industrial construction; generally in construction, adopt horizontal leakage preventing technology; the contaminant water produced in production is focused on after earth's surface is collected; but still there is the situation needing contaminant water to be controlled at certain area, namely adopt vertical grouting curtain Control pollution water to spread in underground.
According to the origin cause of formation of ground, generally soil layer (comprising plain fill, sandy loam, silt, sand etc.), strongly weathered sand-rock, middle weathered rock formation, micro-weathered rock formation, basement rock down can be divided into from earth's surface.The infiltration of the soil body is because soil is the medium with continuous hole, underground water can produce intrapore flowing through soil body hole under water-head effect, the permeability of soil is different according to the temperature of the kind of soil, grating, void ratio and water, from permeable (K < 10 hardly
-7cm/s ﹚ is to high osmosis (K > 10
-1cm/s), 5 grades can be divided into.Be then hole in rock stratum and crack in rock mass be that the infiltration of surface water and the convection of underground water create condition, represent its penetrating power in rock stratum with " Lu ", general≤3Lu then can think and reaches permeable rank hardly.Because soil is different with the physico-mechanical properties of rock, seepage flow mode is different, so its barrier technology is also different.General soil layer vertical seepage control adopts high-pressure rotary spraying method, deep mixing method or grouting etc., but in the soil body, adopt grouting, no matter be infiltrate grouting, fracture grouting, extrusion grouting or electrochemical grouting, its seepage proof curtain formed all cannot ensure its globality because of the limitation of grouting process, anti-seepage effect is unreliable, therefore less employing).Then often adopt Curtain Grouting Method in rock mass, rely on larger grouting pressure to make slurries enter hole in rock mass and crack, the Seed harvest blocking rock mass mesopore after slurry consolidation and crack, form seepage proof curtain.Be generally in rock mass, implement grouting water-tight construction, the method for heavy excavation need be adopted to remove the upper overburden layer of rock mass, and bored grouting again apply grout cover (concrete) on the rock mass exposed after.
Because the construction technology forming seepage proof curtain in soil, rock is different, therefore the seepage proof curtain construction technology adopted in the soil body can not use in rock mass, and the curtain-grouting technique used in rock mass is when upper overburden layer thereon exists, because uncontrollable slurries descending filling rock cranny is (because the soil solidifying intensity of soil layer is low, can not stop grouting plug be laid), and complete grouting curtain cannot be formed make it cannot use in the soil body in soil layer.Therefore when running into this situation, in the soil body, make seepage proof curtain, although vertical seepage control object in soil layer effectively can be reached, underground water streaming in rock mass can not be stoped for general, its anti-seepage effect will be had a greatly reduced quality, and can not meet the engineering that vertical seepage control requirement is high.
Summary of the invention
Object of the present invention is exactly the above-mentioned defect for existing in prior art, and providing that a kind of construction technology is simple, speed of application is fast, engineering cost is low and sealing anti-seepage effect forms the method for complete seepage proof curtain reliably in rock, native two media, the antiseepage curtain wall of formation can reach " permeable hardly " i.e. K < 10
-7cm/s rank.
For realizing above-mentioned purpose of the present invention, the method that the present invention forms complete seepage proof curtain in rock, native two media adopts following steps:
1) region unwrapping wire, the fixed high spray stake of vertical seepage control curtain wall need done at upper soil horizon according to designing requirement or deeply stirring stake holes position;
2) by designing and carrying out height spray stake according to corresponding specification or to rock stratum, bottom only deeply stir pile driving construction, upper soil horizon seepage proof curtain body of wall is formed;
3) by the conditioned time of code requirement, health is carried out to the upper soil horizon seepage proof curtain body of wall formed, make the strength of wall body >=1.0Mpa of upper soil horizon seepage proof curtain body of wall;
4) pitch-row of rock mass curtain-grouting design, hole depth brill curtain-grouting hole, rock stratum is then pressed at the top of upper soil horizon seepage proof curtain body of wall to impermeable rock stratum;
5) then injected hole stop grouting plug is enclosed within the curtain-grouting pipe of rock stratum, and be inserted in curtain-grouting hole, rock stratum, injected hole stop grouting plug is made to be placed in the bottom of upper soil horizon seepage proof curtain body of wall in the curtain-grouting hole, rock stratum at end face place, rock stratum, make upper soil horizon seepage proof curtain body of wall and upper overburden layer as the grout cover of curtain-grouting, thus the curtain-grouting work of rock stratum, bottom can be completed by grouting in rock mass code requirement.
6) static pressure curtain-grouting: by rock stratum curtain-grouting pipe, complete curtain-grouting work by grouting in rock mass code requirement, thus in rock stratum, bottom, form the waterproof curtain wall in rock stratum, bottom, finally form the complete vertical grouting curtain wall from soil layer to rock stratum.
For adapting to higher design antiseepage class requirement, improve the anti-seepage effect of vertical grouting curtain, high location is required at vertical seepage control, the above-mentioned 2nd) step employing three row high spray stakes, the 4th), 5), 6) step adopts two or three row's static pressure curtain-grouting design and constructions, thus composition associating seepage prevention curtain.The advantage of such design and construction is: 1. piling wall thickening and add groundwater seepage path, total infiltration capacity can be reduced; 2. guarantee that the seepage proof curtain formed can not open " skylight " owing to not overlapping between the deflection of pore-forming, stake; 3. the seepage-resistant grade of seepage proof curtain is improved further.
The transmission coefficient of described upper soil horizon seepage proof curtain body of wall controls in K=1.11 × 10
-7cm/s ~ 6.49 × 10
-8cm/s scope; Transmission coefficient q=0.17 ~ the 1.97Lu of the waterproof curtain wall in rock stratum, bottom is formed in rock stratum, bottom.
Adopt the inventive method, established upper soil horizon seepage proof curtain body of wall intensity is much larger than surrounding soil strength, this is because general high spray stake or deeply to stir the hardener that stake adopts be cement paste, its induration formed is a kind of special cement-native network structure, because hydrated cementitious forms various hydrate crystallization around soil particle in pile body, crystallization constantly grows, the weave in that stretches forms the network structure in space, the divided encirclement of the soil body, compacted, Free water reduces gradually, the fluid-tight induration of final formation, its intensity is had any different because soil property is different, minimumly also more than 1.5Mpa can be reached, reach as high as 20Mpa, soil strength then can not be greater than 0.3Mpa, and borehole wall in Seed harvest is complete, aperture is regular, reaches the requirement of laying injected hole stop grouting plug completely, therefore the grouting requirement that next step carries out curtain-grouting can be met.Above-mentioned 6th) connection of the waterproof curtain wall in rock stratum, bottom that the static pressure curtain-grouting that step is taked is formed and upper soil horizon seepage proof curtain body of wall, prevent underground water the infiltration of soil layer and in bottom the streaming of permeable rock mass.Form the vertical grouting curtain of complete leakproof, Practical Project is checked, and the transmission coefficient of high spray stake curtain wall is maximum reaches K < 10
-8cm/s, the rock mass infiltration capacity after curtain-grouting is maximum is less than 0.5Lu.
Have the following advantages after the method that the present invention forms complete seepage proof curtain in rock, native two media adopts above technical scheme:
1) stratum is suitable for extensive.All soil layer, the rock stratum that can carry out curtain-grouting being applicable to high spray stake or deeply stir stake all can adopt this technique;
2) equipment of construction usage mostly is general geotechnical engineering common equipment, and construction, design all have corresponding specification to comply with;
3) reliable construction quality;
4) quality detecting method that country can be used now to have promulgated carries out construction quality inspection, sprays stake or deeply stir stake to adopt flood-pot experiment as height, and curtain-grouting can adopt setting-out to test;
5) operating expenses is low, speed is fast, construction plant takies little;
6) safety and environmental protection.Because adopting cement as the curing compound of seepage proof curtain, so can not secondary pollution be caused.
Service condition: the key point when method that the present invention forms complete seepage proof curtain in rock, native two media uses is the connection how ensureing the impervious wall that two kinds of techniques are formed, and namely formed upper soil horizon seepage proof curtain body of wall should be able to provide to be placed and injected hole stop grouting plug can be made normally to work.By the control of stop grouting plug make curtain-grouting under middle high grouting pressure to the crack of rock mass, hole infiltration, filling.For ensureing the normal work of injected hole stop grouting plug and larger grouting pressure can being born, pile quality, strength of the mixing pile (answering ≮ 1.0Mpa) to be ensured when design, construction, especially when pile body bottom is close to rock stratum.Therefore to the curtain wall that height spray is formed, during design, adopt high spray stake to be connected into wall, stop grouting plug segment should be laid reduce high lance lift speed or multiple pressure spray process is adopted to this section drafting during construction, two rows or three rows should be laid in design simultaneously and be advisable; Stop grouting plug segment should be laid adopt multiple spray to stir technique again, to improve the strength of the mixing pile of this section drafting deeply stirring pile.
Accompanying drawing explanation
Fig. 1 is the representative section figure of the complete vertical grouting curtain wall adopting the inventive method to build.
Fig. 2 is the construction flow chart forming the method for complete seepage proof curtain in rock, native two media.
Be labeled as in figure: 1-rock stratum curtain-grouting pipe; Curtain-grouting hole, 2-rock stratum; 3-upper soil horizon seepage proof curtain body of wall; 4-injected hole stop grouting plug; The waterproof curtain wall in rock stratum, 5-bottom.
Detailed description of the invention
For further describing the present invention, below in conjunction with drawings and Examples, the method that the present invention forms complete seepage proof curtain in rock, native two media is described in further detail.
The representative section figure of the complete vertical grouting curtain wall that employing the inventive method as shown in Figure 1 builds composition graphs 2 are found out, the method that the present invention forms complete seepage proof curtain in rock, native two media adopts following processing step:
1) region unwrapping wire, the fixed high spray stake of vertical seepage control curtain wall need done at upper soil horizon according to designing requirement or deeply stirring stake holes position.
2) carry out height spray stake or deeply stir pile driving construction extremely stopping lower sleeping rock stratum by design and according to corresponding specification, thus form upper soil horizon seepage proof curtain body of wall 3.
3) by the conditioned time of code requirement, health is carried out to the upper soil horizon seepage proof curtain body of wall (3) formed, generally need health 20 days, adjust depending on prevailing circumstances temperature, make the strength of wall body of upper soil horizon seepage proof curtain body of wall 3 reach design load, strength of wall body ≮ 1.0Mpa can carry out lower step operation.
4) pitch-row then designed by rock mass curtain-grouting at the top of the upper soil horizon seepage proof curtain body of wall 3 reaching design strength, hole depth bore 2 to impermeable rock stratum, curtain-grouting hole, rock stratum.
5) then injected hole stop grouting plug 4 is enclosed within the correct position of rock stratum curtain-grouting pipe 1, and be inserted in curtain-grouting hole, rock stratum 2, make injected hole stop grouting plug 4 be placed in the bottom of upper soil horizon seepage proof curtain body of wall 3 in the curtain-grouting hole, rock stratum 2 at end face place, rock stratum.
6) static pressure curtain-grouting: by rock stratum curtain-grouting pipe 1, grouting pressure and slurries the controlling of injecting quantity is controlled by grouting in rock mass specification and designing requirement, complete curtain-grouting work, thus in rock stratum, bottom, form the waterproof curtain wall 5 in rock stratum, bottom, finally form the complete vertical grouting curtain wall from soil layer to rock stratum.In this step, should be high by slip casting Authority Contro1 slip casting section, if the high > 10m of single hop section, then should adopt downward grouting method.
7) by management assigned address height spray stake or deeply stir stake formed curtain wall on hole, carry out flood-pot experiment to check the construction quality of curtain wall.Hole depth is no more than the degree of depth of upper soil horizon seepage proof curtain body of wall 3.
8) to curtain-grouting, after stop grouting plug is laid in upper soil horizon seepage proof curtain body of wall 3 bottom, setting-out experiment is carried out, to check the construction quality of grouting curtain by the boring of management assigned address.
9) quality inspection is qualified, and completion of works is checked and accepted: quality inspection is defective, then again should construct in defective place high spray stake or curtain-grouting are until passed examination.
Put into practice in the mode of over contract of designing and constructing in the vertical grouting curtain construction of the method that the present invention forms complete seepage proof curtain in rock, native two media in certain smeltery.Triple pipe of constructing altogether in engineering height spray stake 613 (wherein the darkest high spray degree of depth 35m, the long 18m of the most shallow stake), 10710 linear meter(lin.m.)s, curtain-grouting 61 hole, effective slip casting length 340 linear meter(lin.m.); Use cement 2100 tons; 45 days engineering times; The transmission coefficient of high spray piling wall is in K=1.11 × 10 after testing
-7cm/s ~ 6.49 × 10
-8cm/s (6 hole flood-pot experiment value); Transmission coefficient q=0.17 ~ the 1.97Lu (3 hole setting-out experiment value) of curtain-grouting section rock stratum.All be less than requirement in the national environmental impact assessment reply suggestion of this unit (K≤10 in soil layer
-7cm/s rank, q≤3Lu in rock stratum).
Application shows, the inventive method adopts new process combination in rock, soil, become the mode of wall, soil layer seepage proof curtain and rock stratum seepage proof curtain is made to form entirety, can reach seepage prevention curtain from the soil body to the connection of waterproof basement rock, thorough shutoff plant area contaminant water subsurface seepage flow passage, can not produce and stream, become that wall permeability coefficient is little, good seepage-proof property, safe and reliable, speed of application is fast, engineering cost is low, ensure that the success that the national environmental impact assessment in certain large-scale smeltery is checked and accepted.
Claims (2)
1. in rock, native two media, form a method for complete seepage proof curtain, it is characterized in that adopting following processing step:
1) region unwrapping wire, the fixed high spray stake of vertical seepage control curtain wall need done at upper soil horizon according to designing requirement or deeply stirring stake holes position;
2) by designing and carrying out height spray stake according to corresponding specification or to rock stratum, bottom only deeply stir pile driving construction, upper soil horizon seepage proof curtain body of wall (3) is formed;
3) by the conditioned time of code requirement, health is carried out to the upper soil horizon seepage proof curtain body of wall (3) formed, make the strength of wall body >=1.0Mpa of upper soil horizon seepage proof curtain body of wall (3);
4) pitch-row of rock mass curtain-grouting design, hole depth brill curtain-grouting hole, rock stratum (2) is then pressed at the top of upper soil horizon seepage proof curtain body of wall (3) to impermeable rock stratum;
5) then injected hole stop grouting plug (4) is enclosed within rock stratum curtain-grouting pipe (1), and be inserted in curtain-grouting hole, rock stratum (2), make injected hole stop grouting plug (4) be placed in the bottom of upper soil horizon seepage proof curtain body of wall (3) in the curtain-grouting hole, rock stratum (2) at end face place, rock stratum;
6) static pressure curtain-grouting: by rock stratum curtain-grouting pipe (1), curtain-grouting work is completed by grouting in rock mass code requirement, thus in rock stratum, bottom, form the waterproof curtain wall in rock stratum, bottom (5), finally form the complete vertical grouting curtain wall from soil layer to rock stratum;
The transmission coefficient of described upper soil horizon seepage proof curtain body of wall (3) controls in K=1.11 × 10
-7cm/s ~ 6.49 × 10
-8cm/s scope, the transmission coefficient of the described waterproof curtain wall in rock stratum, bottom (5) controls at q=0.17 ~ 1.97Lu.
2. in rock, native two media, form the method for complete seepage proof curtain as claimed in claim 1, it is characterized in that: the 2nd) step employing three row high spray stakes, the 4th), 5), 6) step adopts two or three row's static pressure curtain-grouting design and constructions, thus composition associating seepage prevention curtain.
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| CN112982464B (en) * | 2021-02-03 | 2022-04-08 | 中煤科工集团西安研究院有限公司 | Method for closing up weak sections of curtain |
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| CN104141314A (en) | 2014-11-12 |
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