CN115504723B - Plastic slurry suitable for anti-seepage grouting of karst development stratum - Google Patents
Plastic slurry suitable for anti-seepage grouting of karst development stratum Download PDFInfo
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- CN115504723B CN115504723B CN202211374131.7A CN202211374131A CN115504723B CN 115504723 B CN115504723 B CN 115504723B CN 202211374131 A CN202211374131 A CN 202211374131A CN 115504723 B CN115504723 B CN 115504723B
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- 239000002002 slurry Substances 0.000 title claims abstract description 71
- 239000002689 soil Substances 0.000 claims abstract description 72
- 239000002245 particle Substances 0.000 claims abstract description 40
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 35
- 239000004568 cement Substances 0.000 claims abstract description 21
- 238000010276 construction Methods 0.000 claims abstract description 18
- 238000007873 sieving Methods 0.000 claims abstract description 7
- 239000007787 solid Substances 0.000 claims abstract description 7
- 235000019738 Limestone Nutrition 0.000 claims description 4
- 239000011362 coarse particle Substances 0.000 claims description 4
- 239000006028 limestone Substances 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 3
- 239000004927 clay Substances 0.000 abstract description 32
- 238000000034 method Methods 0.000 abstract description 28
- 230000008569 process Effects 0.000 abstract description 13
- 239000000843 powder Substances 0.000 abstract description 8
- 238000004537 pulping Methods 0.000 abstract description 5
- 238000010521 absorption reaction Methods 0.000 abstract description 4
- 239000003054 catalyst Substances 0.000 abstract description 4
- 239000000463 material Substances 0.000 description 10
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 9
- 230000000694 effects Effects 0.000 description 5
- 230000002265 prevention Effects 0.000 description 5
- 239000000654 additive Substances 0.000 description 4
- 230000000996 additive effect Effects 0.000 description 4
- 239000004575 stone Substances 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000011049 filling Methods 0.000 description 3
- 239000003673 groundwater Substances 0.000 description 3
- 235000011837 pasties Nutrition 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 208000005189 Embolism Diseases 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 241000801118 Lepidium Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
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- 238000005755 formation reaction Methods 0.000 description 1
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- 238000003475 lamination Methods 0.000 description 1
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- 230000003014 reinforcing effect Effects 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/04—Silica-rich materials; Silicates
- C04B14/10—Clay
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/16—Sealings or joints
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/70—Grouts, e.g. injection mixtures for cables for prestressed concrete
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The plastic slurry suitable for the anti-seepage grouting of karst development stratum is mainly prepared from (10-25) 100 (45-70) cement, crushed soil and water, wherein the crushed soil is prepared by crushing and sieving original cohesive soil. In the plastic slurry, the original sticky soil on site is adopted to prepare the crushed soil with the particle size smaller than 20mm, the specific surface area is much smaller than that of clay powder or clay particles obtained by the prior method, and the particle size is 400m 2 Above/kg is reduced to 10m 2 The ratio of the total weight of the catalyst to the total weight of the catalyst is less than or equal to kg; in the pulping process of the crushed soil, the water consumption is reduced from the water-solid ratio (0.88-1.1) to the water-solid ratio (0.44-0.56) to below 1, so that the water consumption of plastic slurry is greatly reduced; the initial fluidity TF value of the slurry is 120-170 mm, and the fluidity TF value after half an hour is 110-140 mm, so that the water absorption rate of the slurry is greatly slowed down, and the pipe blockage in the construction process is reduced.
Description
Technical Field
The invention belongs to the field of mine curtain grouting, and particularly relates to a plastic slurry suitable for seepage prevention grouting of karst development strata mainly with erosion cracks or karst cave, which can also be used for seepage prevention reinforcement of earth dams and clay core wall dams in hydraulic and hydroelectric engineering.
Background
Limestone mines for producing cement are often located in karst development areas, and when pit excavation is adopted, groundwater can be discharged to a pit, so that the groundwater is pumped out in a large amount, the groundwater level is rapidly reduced, peripheral collapse is caused, and many geological disasters are caused. For karst mine water burst, curtain grouting is mainly adopted. For filling large karst cave, the filling slurry amount is about 10 square, so the material cost of slurry materials and the water blocking construction effect are mainly reduced.
The pulse grouting technology is a main treatment method of curtain grouting of the dam body of the present earth dam, and the method is characterized in that a double-cylinder reciprocating pump is adopted to intermittently press pasty slurry with good controllability and low cost into the dam body of the dam, and grouting pressure is balanced by using viscous force, larger internal friction resistance, counter pressure of surrounding medium and the like of the pasty slurry, so that the controllability of diffusion radius is realized, the compaction treatment of soil at a slurry outlet is realized, and the porosity and permeability coefficient of the soil are greatly reduced; the required curtain body with continuous, complete and low permeability coefficient is formed by grouting from bottom to top without embolism. Chinese characterIn patent application CN201210172437.4, there is disclosed a method for non-embolism grouting by using clay paste with fluidity of 60-80 mm, the method adopts a clay pulping machine to crush and screen clay, soak clay to form clay slurry with specific gravity of 1.15-1.25 cm 3 The water content of the clay slurry exceeds 60 percent, and then cement and an additive are added into the clay slurry to form paste slurry, which is called as paste slurry for short. The method has the advantages of good continuous pulping effect, slurry particles up to 95% less than 80um, good pourability, small slurry fluidity, good controllability and the like. The disadvantage is that the clay slurry has high water content, and when the slurry with low fluidity is prepared, a large amount of cement and additive are needed to be added, so that the material cost is high and reaches 400 yuan/m 3 . Meanwhile, as the pasty slurry mainly comprises particle materials with the particle size smaller than 80um, repeated splitting is easy to occur in the soil body, so that the filling amount is extremely large, and the hole depth per meter reaches 1-2 m 3 The cost is high, and the manufacturing cost is high; meanwhile, as the clay particles prepared by adopting the clay pulping machine have smaller particle size, the clay particles are easy to wash away under the action of the dynamic water, so that the grouting is ineffective, and a large amount of grouting materials are wasted. In addition, there are also commercially available clay powders as grouting materials, which are obtained by drying soil until the water content is less than 5%, grinding by a ball mill to obtain clay particles, and the clay particles have a specific surface area as large as that of clay particles in clay slurry, usually 400m 2 Above/kg, and then transported from the manufacturer to the construction site for a further long distance. In the construction site, cement, soil and water are adopted to prepare paste slurry, and the method utilizes dry clay powder, cement and water to prepare thicker slurry, which has the defects of high transportation cost of the clay powder, high carbon emission in the drying process and high cost of grinding the clay, so that the material cost of the paste slurry reaches 600 yuan/m 3 The above. Meanwhile, in the construction process, the dried clay powder has large specific surface area, quick water absorption and easy agglomeration, so that the water consumption is large, the water-solid ratio is usually more than 1.1:1, meanwhile, the slurry absorbs water quickly, the viscosity is continuously and quickly increased, the pipe is easily blocked in the grouting process, the construction is impossible or the workability is poor, and the quality problem is easy to occur.
Disclosure of Invention
The invention aims to solve the technical problems and overcome the defects and shortcomings in the background art, and provides plastic slurry suitable for anti-seepage grouting of karst development stratum.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
the plastic slurry is mainly prepared from (10-25): 100 (45-70) of cement, crushed soil and water, wherein the crushed soil is prepared by crushing and sieving undisturbed cohesive soil.
The plastic slurry preferably has a water-to-solid ratio of (0.44 to 0.56) 1.
In the plastic slurry, the initial fluidity TF value (Table-jump method) of the plastic slurry is preferably 120 to 170mm, and the fluidity TF value after half an hour is preferably 110 to 140mm. Compared with the traditional clay cement paste (measured fluidity TF value (table jump method) of 210-240 mm) with the measured fluidity of 60-80 mm in the plate fluidity (as in CN 201210172437.4), the cement paste has smaller fluidity and larger internal friction resistance, has higher pressure in the grouting process, and can achieve grouting design pressure under the condition of small grouting amount; meanwhile, the water content of the slurry is lower, the cement consumption can be reduced by more than 2/3 under the condition of the same strength, and the injection amount of the slurry is reduced by more than 1/3 under the condition of the same stratum.
The plastic slurry described above, preferably, the crushed soil is prepared by the following preparation method:
(1) Digging limestone weathered soil near a construction site, namely undisturbed cohesive soil, wherein the water content of the soil is required to be less than 40%;
(2) Crushing undisturbed soil by adopting a single-rotor and folding blade fine crusher, sieving by using a 10-20 mm grid, and removing coarse particles to form crushed soil with the particle size smaller than 20mm.
The plastic slurry preferably has a crushed soil particle size of 5mm or more, a crushed soil particle size of 1mm or more, a crushed soil particle size of 40% or more, and a specific surface area of 10m or less 2 /kg。
The plastic slurry is required to have the moisture content of undisturbed cohesive soil less than 40%, and the main reason is that the moisture content is too high, the crushing difficulty is increased, and the formed crushed soil is mutually stuck and is not easy to screen.
Compared with clay powder purchased in the market, the crushed clay has the following advantages: the crushed soil particles are larger and smaller than 20mm, wherein the formed crushed soil particles with the particle diameter larger than 5mm account for more than 20%, the formed crushed soil particles with the particle diameter larger than 1mm account for more than 40%, and the crushed soil particles with the particle diameter larger than strength, small specific surface area and slow water absorption are obtained after mechanical extrusion and crushing of the crushed soil, so that the particles in the formed slurry mixture are larger, the required total water amount is greatly reduced, and the later-stage cement addition is also greatly reduced; in addition, in the soil preparation process, the soil does not need to be dried or sunned, so that intermediate links are reduced, carbon emission is reduced, and the construction efficiency is greatly improved.
Preferably, the plastic slurry is prepared from soil on a construction site, the transportation cost is low, the raw material cost is low, and the cost of one ton of crushed soil is not more than 30 yuan.
Compared with the prior art, the invention has the advantages that:
(1) In the plastic slurry, the original sticky soil on site is adopted to prepare the crushed soil with the particle size smaller than 20mm, the specific surface area is much smaller than that of clay powder or clay particles obtained by the prior method, and the particle size is 400m 2 Above/kg is reduced to 10m 2 The ratio of the total weight of the catalyst to the total weight of the catalyst is less than or equal to kg; in the pulping process of the crushed soil, the water consumption is reduced from the water-solid ratio (0.88-1.1) to the water-solid ratio (0.44-0.56) to below 1, so that the water consumption of plastic slurry is greatly reduced; the initial fluidity TF value of the slurry is 120-170 mm, and the fluidity TF value after half an hour is 110-140 mm, so that the water absorption rate of the slurry is greatly slowed down, and the pipe blockage in the construction process is reduced.
(2) In the plastic slurry, the original state cohesive soil on site is adopted to prepare the crushed soil with the grain diameter smaller than 20mm, so that the cost of soil used in the plastic slurry is greatly reduced, and the cost of one ton of crushed soil can be controlled within 30 yuan/ton; and one ton of the commercial clay powder is transported to engineering projects, and the cost of one ton of on-site clay slurry is more than 80 yuan/ton at more than 300 yuan/ton.
(3) When the strength of the stone body is the same finally, compared with the existing paste slurry, the plastic slurry can greatly reduce the cement consumption, and the cement slurry adding ratio is reduced from 50% to below 20%.
(4) The crushed soil adopted in the plastic slurry contains a large amount of coarse particles, the particle size of more than 5mm is more than 20%, the plastic slurry can replace sand, construction procedures are simplified, karst plugging treatment is carried out under the condition of flowing water, and the plastic slurry has a very good construction effect.
In conclusion, the invention adopts the original clay near the construction site to directly dig and crush the original clay to form crushed soil with the particle diameter of less than 20mm and the specific surface area of less than 10m aiming at the characteristics of karst treatment engineering 2 Per kg, the cost of the used soil is reduced to be within 30 yuan/ton; the plastic slurry formed by the broken soil has a slow thickening effect, the strength of the stone body is improved by 3-5 times under the same cement condition, compared with the existing slurry material, the cement additive amount can be greatly reduced, the pumpability of the slurry is increased, the energy consumption is reduced, the manufacturing cost and the raw material cost of 2/3 materials can be saved, and the plastic slurry is used for carrying out pulse grouting treatment on large soil holes, karst cave, fully weathered or strongly weathered rock formations with fault development and numerous fracture groups, so that the good seepage prevention treatment effect can be quickly and economically achieved, and is also suitable for grouting seepage prevention treatment of earth dams and core wall dams.
Drawings
FIG. 1 is a photograph of crushed soil used for the plastic slurry in example 1 of the present invention.
Detailed Description
The invention will be described more fully hereinafter with reference to the preferred embodiments for the purpose of facilitating an understanding of the invention, but the scope of the invention is not limited to the specific embodiments described below.
Unless defined otherwise, all technical and scientific terms used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the scope of the present invention.
Unless otherwise specifically indicated, the various raw materials, reagents, instruments, equipment and the like used in the present invention are commercially available or may be prepared by existing methods.
Example 1:
the limestone ore in the Lepidium mining area of the ancient cooking vessel of Changde city is located in North and west directions of Changde city and is directly 30km away. The mine starts working in 3 months of 2010 and 10 months of 2011, and the karst cave at the position of +27m on the wall of the south pit suddenly gushes water until 60000m in 2013 3 And/d. In 2014 to 2017, the pit is used for two-stage water control. After the curtain is implemented, the pit is normally mined. Under the influence of blasting, the water inflow in the south of the pit is 5000m after treatment 3 The/d is gradually increased to 18000m 3 And/d. For mining south overburden resources, a curtain construction is performed around the red line.
The design adopts a hole pitch of 3m, and double-row curtains are designed for strong karst development areas and fault development areas of F1 and F2 fault positions, and the positions with particularly large local injection quantity consider to be added with measure holes or encryption holes, the row pitch is 1.5m and the hole pitch is 3m.
The construction process is a pulsating grouting construction process, and the construction materials adopted are mainly clay, cement and additive HY-1.
Crushing and hydrating clay to form clay slurry of 1.20-1.25 g/cm 3 Is soaked for 24 hours for standby. The clay slurry mixing ratio was about 100 kg/150 kg/220 kg/5 kg of the clay slurry/cement/water admixture HY-1=250L/150 kg/5 kg, and the slurry fluidity TF value (Table jump method) was 230mm. During grouting, the slurry is passively flushed into the pit, the slurry retention rate in the karst cave is less than 20%, a large amount of slurry is wasted, and the water blocking effect is poor.
Then the plastic slurry is adopted for plugging, and the specific process is as follows:
(1) The test shows that the moisture content of the undisturbed cohesive soil on the mountain top is 29%. Digging and piling undisturbed cohesive soil on site, feeding by adopting a forklift and adopting a single rotor and a folding bladeCrushing by the fine crusher, sieving by a 10-20 mm grid, and removing coarse particles to form crushed soil with the diameter smaller than 20mm. Through a particle test, the proportion of the crushed soil particles with the particle diameter larger than 5mm is 32%, the proportion of the crushed soil particles with the particle diameter larger than 1mm is 55%, and the specific surface area is about 2m 2 Kg, as shown in FIG. 1.
(2) The crushed soil is prepared into plastic slurry, and the proportion of each component in the plastic slurry is cement to crushed soil to water=20:100:50.
(3) The slurry was tested for an initial TF value (Table-jump) of 140mm and a flow TF value after half an hour of 120mm.
(4) Grouting construction is carried out on the main karst pipeline by adopting a pulse grouting technology, the pumping pressure is 3.0-4.0 MPa, after 2000 cubic plastic slurry is injected, water-gushing points disappear, and the water-blocking rate is 100%.
The compressive strength of the plastic slurry adopted in the embodiment reaches 1.5MPa after the detection of the 28-day material stone body.
Example 2:
the Xinhua county vehicle Tian Jiangshui reservoir is positioned at the upstream of the first-class tributary oil stream of the Yijiang river and is positioned in the watershed zone of the Yishui and Hunan water, and the reservoir dam area belongs to the land form of low mountain ridge valley corrosion structure and is an inclined basin. The dam site area is a deep river valley, is in a V shape, and has a bottom width of about 50m; left bank lower slope ratio 1:1.7, upper slope ratio 1:2.3; the lower slope ratio of the right bank is 1:1.7, and the upper slope ratio is 1:1.9; the elevation of the ground surface of the dam area is 430 m-860 m. The river bed elevation at the dam site is 435-440 m, the mountain top elevation is 600-700 m, the mountain bedrock is mostly in an exposed state, the fourth-series slope lamination is thinner, and the vegetation development is general. The upper vegetation of the mountain of the right bank is covered, and the lower partial bedrock is exposed.
In the danger-removing and reinforcing engineering of a vehicle Tian Jiang reservoir, the dam body is a clay core wall dam, grouting and seepage-preventing treatment is carried out on the dam body by adopting a pulse grouting method, the hole spacing is 1.0m, the row spacing is 0.7m, and the seepage-preventing treatment is carried out on the dam body by adopting a pulse grouting process and the plastic slurry disclosed by the invention, wherein the concrete process is as follows:
(1) Digging out undisturbed clay near 5km of a Tian Jiang dam body of a vehicle, removing stones larger than 10cm, and transferring the clay into a soil yard by a loader to obtain a water content of 38%, a clay content of 12% and a gravel content of less than 10%;
(2) Storing soil, loading the soil onto a belt by a forklift, conveying the belt into a fine crusher system, extruding and crushing the soil to form crushed soil, wherein the particle size of the crushed soil is measured to be 0.5-8 mm, the particle size is more than 64% of 1mm, the particle size is more than 22% of 5mm, and the specific surface area is about 10m 2 /kg；
(3) Mixing and stirring cement, crushed soil and water according to the mass ratio of 10:100:50 to form plastic slurry, wherein the initial TF value of the slurry fluidity (table jump method) is 170mm, and the TF value of the slurry fluidity after half an hour is 140mm;
(4) And (3) adopting a pulse grouting process to fill the plastic slurry into the stratum from bottom to top in sections to form the seepage-proofing body. And (3) detecting the detection holes after 14 days, wherein the seepage prevention coefficient of each section of the full hole is 0.5-0.95 Lu, and the design standard is less than 1Lu.
The compressive strength of the plastic slurry in the embodiment reaches 1.1MPa after 28 days of detection.
Claims (1)
1. The plastic slurry is characterized by being prepared from cement, crushed soil and water, wherein the mass ratio of the cement to the crushed soil is (10-25): 100, and the crushed soil is prepared by crushing and sieving undisturbed cohesive soil; the broken soil is obtained by digging limestone weathered soil near a construction site, and then breaking and sieving; the crushed soil is prepared by the following preparation method:
(1) Digging out undisturbed cohesive soil with water content less than 40%;
(2) Crushing undisturbed cohesive soil, sieving by a 10 mm-20 mm grid, and removing coarse particles to obtain crushed soil with the particle size smaller than 20mm, wherein the proportion of the particle size of the crushed soil larger than 5mm is not lower than 20%, and the proportion of the particle size larger than 1mm is not lower than 40%;
the water-solid ratio of the plastic slurry is (0.44-0.56): 1, and the initial fluidity TF value of the plastic slurry is 120-170 mm and the fluidity TF value after half an hour is 110-140 mm by adopting a table jump test.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211374131.7A CN115504723B (en) | 2022-11-03 | 2022-11-03 | Plastic slurry suitable for anti-seepage grouting of karst development stratum |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211374131.7A CN115504723B (en) | 2022-11-03 | 2022-11-03 | Plastic slurry suitable for anti-seepage grouting of karst development stratum |
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| CN115504723B true CN115504723B (en) | 2023-11-17 |
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|---|---|---|---|---|
| JP2008303586A (en) * | 2007-06-06 | 2008-12-18 | Kyokado Eng Co Ltd | Soil reinforcing method |
| CN102249642A (en) * | 2011-05-04 | 2011-11-23 | 湖南宏禹水利水电岩土工程有限公司 | Thixotropic pasty grout containing clay slurry and preparation method thereof |
| CN102660952A (en) * | 2012-05-30 | 2012-09-12 | 湖南宏禹水利水电岩土工程有限公司 | Controllable clay paste slurry grouting technique |
| KR101357829B1 (en) * | 2013-04-16 | 2014-02-06 | (주)서해산업개발 | Recycling material of industrial sludge for use of fill material, cover material and subbase material and method for producing the same |
| CN109279829A (en) * | 2018-11-15 | 2019-01-29 | 北京中煤矿山工程有限公司 | A kind of environmentally friendly injecting paste material based on Wumeng Shan Mountain section laterite |
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