CN114790092A - Method for preparing slurry of slurry retaining wall type cast-in-situ bored pile - Google Patents
Method for preparing slurry of slurry retaining wall type cast-in-situ bored pile Download PDFInfo
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- CN114790092A CN114790092A CN202210596879.5A CN202210596879A CN114790092A CN 114790092 A CN114790092 A CN 114790092A CN 202210596879 A CN202210596879 A CN 202210596879A CN 114790092 A CN114790092 A CN 114790092A
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- 239000002002 slurry Substances 0.000 title claims abstract description 90
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 24
- 229910000278 bentonite Inorganic materials 0.000 claims abstract description 33
- 239000000440 bentonite Substances 0.000 claims abstract description 33
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 33
- 238000010276 construction Methods 0.000 claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229920000642 polymer Polymers 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 14
- 230000008569 process Effects 0.000 claims abstract description 11
- 238000005070 sampling Methods 0.000 claims abstract description 10
- 238000002474 experimental method Methods 0.000 claims abstract description 4
- 238000012360 testing method Methods 0.000 claims abstract description 4
- 229940092782 bentonite Drugs 0.000 claims description 31
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 16
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 12
- 239000004927 clay Substances 0.000 claims description 10
- 239000002689 soil Substances 0.000 claims description 10
- 239000004576 sand Substances 0.000 claims description 9
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 7
- 235000017550 sodium carbonate Nutrition 0.000 claims description 7
- 229910000281 calcium bentonite Inorganic materials 0.000 claims description 6
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 claims description 6
- 229910052901 montmorillonite Inorganic materials 0.000 claims description 6
- 229920002472 Starch Polymers 0.000 claims description 4
- 125000002057 carboxymethyl group Chemical group [H]OC(=O)C([H])([H])[*] 0.000 claims description 4
- 229920003063 hydroxymethyl cellulose Polymers 0.000 claims description 4
- 229940031574 hydroxymethyl cellulose Drugs 0.000 claims description 4
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 claims description 4
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 claims description 4
- 239000008107 starch Substances 0.000 claims description 4
- 235000019698 starch Nutrition 0.000 claims description 4
- ONCZQWJXONKSMM-UHFFFAOYSA-N dialuminum;disodium;oxygen(2-);silicon(4+);hydrate Chemical compound O.[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Na+].[Na+].[Al+3].[Al+3].[Si+4].[Si+4].[Si+4].[Si+4] ONCZQWJXONKSMM-UHFFFAOYSA-N 0.000 claims description 3
- 229920006158 high molecular weight polymer Polymers 0.000 claims description 3
- 229910000280 sodium bentonite Inorganic materials 0.000 claims description 3
- 229940080314 sodium bentonite Drugs 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims 1
- 239000002245 particle Substances 0.000 abstract description 18
- 238000002360 preparation method Methods 0.000 abstract description 17
- 238000001914 filtration Methods 0.000 abstract description 8
- 230000009286 beneficial effect Effects 0.000 abstract description 6
- 230000015572 biosynthetic process Effects 0.000 abstract description 4
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 4
- 239000001257 hydrogen Substances 0.000 abstract description 4
- 238000005553 drilling Methods 0.000 description 10
- 238000002156 mixing Methods 0.000 description 5
- 239000007787 solid Substances 0.000 description 4
- 239000010419 fine particle Substances 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
Images
Classifications
-
- 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
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/28—Polysaccharides or derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/5045—Compositions based on water or polar solvents containing inorganic compounds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/506—Compositions based on water or polar solvents containing organic compounds
- C09K8/508—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/5083—Compositions based on water or polar solvents containing organic compounds macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/506—Compositions based on water or polar solvents containing organic compounds
- C09K8/508—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/514—Compositions based on water or polar solvents containing organic compounds macromolecular compounds of natural origin, e.g. polysaccharides, cellulose
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
The invention discloses a method for preparing slurry of a slurry retaining wall type cast-in-situ bored pile, which comprises the following steps: s1, preparing a configuration material, wherein the configuration material comprises: water, bentonite and high molecular polymers; s2, surveying the geological condition and the construction condition in the process; s3, sampling experiment is carried out on the slurry, and various performance indexes of the slurry are determined; s4, forming a plurality of different proportioning schemes according to various performance indexes of the slurry; s5, testing whether each proportioning scheme meets the performance index; s6, selecting an optimal proportioning scheme, and adding the configuration materials into the drill holes according to the optimal proportioning scheme to form the wall protection slurry. The invention is beneficial to the formation of lattice surface hydrogen bonds by adsorbing the high molecular polymer on the surface of the bentonite particles, and can form a net structure, so that the viscosity of the slurry is increased, the filtration loss is reduced, various performances of the slurry are improved, the preparation is convenient, and the preparation cost is low.
Description
Technical Field
The invention relates to the technical field of drilling and grouting slurry, in particular to a method for preparing slurry of a slurry retaining wall type cast-in-situ bored pile.
Background
For pile foundations on complex foundations such as soft foundations, stone blocks and the like, accidents such as hole collapse, drill sticking, drill burying and the like are easy to generate due to the adoption of dry method hole forming, and a mud dado hole forming construction process is mostly adopted for ensuring the construction safety. For the whole building, the bearing capacity of the pile foundation directly determines the overall stability of the building, and the quality of the retaining wall slurry largely determines the quality of the pile foundation. The slurry is a suspension system mainly composed of water, bentonite particles, cohesive soil particles and an additive, wherein generally, the water accounts for 70-80% and the solid particles account for 20-30% according to volume ratio, and the slurry mainly comprises slurry concentration, slurry dry solid organic content, slurry salinity, pH value, solid particle surface potential, solid particle size distribution and the like. During the drilling process, the components and the characteristics of the drilling mud are changed continuously, the mud is gradually deteriorated due to the mixing of drilling slag, and the drilling mud needs to be treated or discarded when the use requirements cannot be met.
Therefore, improvements to the prior art are yet to be made.
Disclosure of Invention
The invention aims to provide a method for preparing slurry of a slurry retaining wall type cast-in-situ bored pile, and aims to solve the technical problems that the conventional cast-in-situ bored pile is inconvenient to prepare and high in cost, and the conventional retaining wall slurry is not good enough in performance.
In order to achieve the purpose, the technical scheme of the invention is as follows: a method for preparing slurry of a slurry retaining wall type cast-in-situ bored pile comprises the following steps:
s1, preparing a configuration material, wherein the configuration material comprises: water, bentonite and high molecular polymers;
s2, surveying the geological condition and the construction condition in the process;
s3, performing sampling experiments on the slurry, and determining various performance indexes of the slurry;
s4, forming a plurality of different proportioning schemes according to various performance indexes of the slurry;
s5, testing whether each proportioning scheme meets the performance index;
s6, selecting an optimal proportioning scheme, and adding the configuration materials into the drill holes according to the optimal proportioning scheme to form the wall protection slurry.
The preparation method of the slurry for the slurry retaining wall type cast-in-situ bored pile comprises the following steps of mixing 0.1% of sodium polyacrylate and 0.4% of carboxymethyl starch, and stirring.
The mud preparation method of the mud retaining wall type cast-in-situ bored pile comprises the following steps of mixing bentonite, sodium bentonite and calcium bentonite, and stirring.
The preparation method of the slurry retaining wall type cast-in-situ bored pile comprises the following steps of mixing the slurry with the cement, and stirring the slurry to obtain the slurry.
The mud preparation method of the mud retaining wall type cast-in-situ bored pile comprises the steps of adopting loess or clay with sand content to naturally make mud when the geological condition and the construction condition are better, and adding soda ash and sodium hydroxide into the mud when the mud prepared by the clay is found to be not in accordance with the requirements during construction.
The mud preparation method of the mud retaining wall type cast-in-situ bored pile comprises the steps of preparing mud by using calcium bentonite with good service performance when the geological condition and the construction condition are poor, mixing the mud into a coarse sand layer according to the proportion of 12-15kg in 100L of water, and then adding 0.8kg of hydroxymethyl cellulose and 0.3kg of soda into the mud.
The preparation method of the slurry retaining wall type cast-in-situ bored pile comprises the following step of using bentonite accounting for 5-11% of the water.
The mud preparation method of the mud retaining wall type cast-in-situ bored pile comprises the following steps of taking a clay soil layer as a local geological condition and taking 5% of bentonite.
The mud preparation method of the mud retaining wall type cast-in-situ bored pile comprises the steps of sampling and measuring the mud at corresponding time and position in order to better control the performance index of the retaining wall mud in the construction process, sampling at the upper part, the middle part and the bottom part, and measuring various performances of the mud.
The mud preparation method of the mud retaining wall type cast-in-situ bored pile comprises the following step of preparing bentonite, wherein the bentonite mainly comprises montmorillonite.
Has the beneficial effects that: the invention is beneficial to the formation of lattice surface hydrogen bonds by adsorbing the high molecular polymer on the surface of the bentonite particles, and can form a net structure, so that the viscosity of the slurry is increased, the filtration loss is reduced, various performances of the slurry are improved, the preparation is convenient, and the preparation cost is low.
Drawings
FIG. 1 is a block diagram of the steps of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples.
The requirements for the slurry in the actual process of drilling the cast-in-situ pile are as follows: the protective hole wall has strong performance, lower filtration loss and better wall protection; the cooling performance is good, and the drill bit is prevented from being burnt in the drilling process; the impurity carrying performance is high, the sediment cleaning cost is reduced, and the drilling efficiency is improved; the lubricating agent has proper lubricity, so that not only is the frictional resistance between the drill rod and the soil layer effectively reduced, but also the excessive reduction of the side frictional resistance of the pile is avoided.
As shown in fig. 1, the invention discloses a method for preparing slurry of a slurry retaining wall type cast-in-situ bored pile, which comprises the following steps:
s1, preparing a configuration material, wherein the configuration material comprises: water, bentonite and high molecular polymer;
s2, surveying the geological condition and the construction condition in the process;
s3, sampling experiment is carried out on the slurry, and various performance indexes of the slurry are determined;
s4, forming a plurality of different proportioning schemes according to various performance indexes of the slurry;
s5, testing whether each proportioning scheme meets the performance index;
s6, selecting an optimal proportioning scheme, and adding configuration materials into the drill holes according to the optimal proportioning scheme to form the wall protection slurry.
The invention adsorbs the bentonite particles on the surface through the high molecular polymer, which is beneficial to the formation of hydrogen bonds on the lattice surface and can form a net structure, so that the viscosity of slurry is increased, and the filtration loss is reduced. By observing the micro-topography before and after the bentonite added with the high polymer, the appearance of the bentonite particles added with the high polymer is not obviously different from the original bentonite, which indicates that the crystal structure of the bentonite is not damaged. The boundary between original soil particles of the bentonite is clearer, the dispersion is more uniform, and the particles are not obviously aggregated; the fine particles are uniformly dispersed and tightly distributed, a phenomenon of mutual aggregation occurs among partial fine particles, and montmorillonite fine particles with a desalted side contour are also observed to aggregate together because long carbon chains of high polymers are linked at the end of a montmorillonite layer to play a role in bridging among the particles, so that the acting force among the particles is enhanced, and the linking form among the particles not only enhances the stable strength of a slurry system and improves the viscosity of the slurry system, but also is beneficial to stabilizing the migration of free water in the slurry system and reducing the filtration loss of the slurry. The addition of a suitable amount of the high molecular weight polymer results in an improvement in various properties of the slurry because the high molecular weight polymer can be adsorbed on the surface of the bentonite particles.
The slurry making technology added with the high molecular polymer is simple and convenient to operate, the slurry making performance of the sodium-modified soil is improved, and the low-grade bentonite is changed into the high-quality muddy soil under the condition of low cost. The method not only makes full use of the low-grade bentonite resource in China and improves the utilization rate of the bentonite resource in China, but also provides technical guidance for the industrial production of the slurry material.
Preferably, the high molecular polymer is 0.1% of sodium polyacrylate and 0.4% of carboxymethyl starch.
When the high molecular polymer is 0.1 percent of sodium polyacrylate and 0.4 percent of carboxymethyl starch, the filtration loss is 14.5 mL, and other properties also meet the requirements of national standards on slurry soil.
Preferably, the bentonite includes sodium bentonite and calcium bentonite.
Preferably, the performance indexes include density, viscosity, sand content and pH value.
Preferably, when the geological condition and the construction condition are better, loess or clay with sand content is adopted for naturally slurrying, and when the mud prepared from the clay is found to be not satisfactory during construction, soda ash and sodium hydroxide are added into the mud.
The performance index of the slurry is obviously improved by adding the sodium carbonate and the sodium hydroxide.
Preferably, when the geological condition and the construction condition are poor, the calcium bentonite concocting slurry with better service performance is mixed into the coarse sand layer according to the proportion of 12-15kg in each 100L of water, and then 0.8kg of hydroxymethyl cellulose and 0.3kg of soda ash are added into the slurry.
The wall protection effect can be enhanced by adding 0.8kg of hydroxymethyl cellulose and 0.3kg of soda ash into the slurry; the cellulose can form a film on the surface of the soil layer to prevent the hole wall from peeling off, and has the function of reducing water loss; the pH value of the slurry can be increased to about 10 by the soda ash, the clay particles are easy to decompose, the colloid rate and the stability of the slurry are comprehensively improved, the water loss is reduced, the viscosity is increased, and the fluidity is kept.
Preferably, the amount of bentonite is 5% -11% of the amount of water.
Preferably, the bentonite is present in an amount of 5% when the geological conditions are clay soil.
Preferably, in order to better control the performance index of the wall protection slurry in the construction process, the slurry needs to be sampled and measured at corresponding time and position, three positions of the upper part, the middle part and the bottom part are taken for sampling, and various performances of the slurry are measured.
The quality of the slurry is ensured by sampling measurement so as to know the performance of the slurry in real time. When the fresh slurry is stirred to reach 100 cubic meters and is left for 24 hours, sampling is needed to measure various performance indexes of the slurry, including density, viscosity, sand content, pH value and the like. The depth of the slurry in the hole needs to be detected at intervals, three positions of the upper part, the middle part and the bottom part are sampled in actual construction, and various properties of the slurry are measured. After the steel reinforcement cage is placed in the hole and before concrete is poured, samples are taken from the upper position, the middle position and the lower position of slurry in the hole for determination.
Preferably, the main component of the bentonite is montmorillonite.
Montmorillonite used in slurry preparation has specific layered structure to make it have ion exchange property, adsorption property and expansibility; the bentonite particles can be dispersed into gel with a net structure in a static water medium, the fluidity becomes good after external force is applied, the excellent thixotropy is embodied, and the bentonite is used as a basic slurry preparation material of the drilling fluid and plays roles of viscosity increasing, fluid loss reducing and the like.
The invention is beneficial to the formation of hydrogen bonds on the surface of crystal lattices by adsorbing the high molecular polymer on the surface of the bentonite particles, can also form a net structure, increases the viscosity of slurry, reduces the filtration loss, improves various performances of the slurry, and has convenient preparation and low preparation cost. The wall protection slurry prepared by adding the high molecular polymer meets the aim of increasing viscosity and reducing filtration loss, ensures pile forming quality, improves drilling efficiency and reduces sediment cleaning cost.
The above is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, modifications or equivalent substitutions of the technical solution of the present invention without inventive work may be made without departing from the scope of the present invention.
Claims (10)
1. A method for preparing slurry of a slurry retaining wall type cast-in-situ bored pile is characterized by comprising the following steps: s1, preparing a configuration material, wherein the configuration material comprises: water, bentonite and high molecular polymers; s2, surveying the geological condition and the construction condition in the process; s3, performing sampling experiments on the slurry, and determining various performance indexes of the slurry; s4, forming a plurality of different proportioning schemes according to various performance indexes of the slurry; s5, testing whether each proportioning scheme meets the performance index; s6, selecting an optimal proportioning scheme, and adding configuration materials into the drill holes according to the optimal proportioning scheme to form the wall protection slurry.
2. The method for preparing mud for a mud-backed wall-bored pile according to claim 1, wherein the high molecular weight polymer is 0.1% sodium polyacrylate +0.4% carboxymethyl starch.
3. The method of making a mud for a mud-backed bored pile according to claim 1, wherein the bentonite includes sodium bentonite and calcium bentonite.
4. The method for preparing the slurry for the mud retaining wall type cast-in-situ bored pile according to claim 1, wherein the performance indexes include density, viscosity, sand content and pH value.
5. The method for preparing mud for a mud retaining wall type cast-in-situ bored pile according to claim 1, wherein when the geological conditions and the construction conditions are relatively good, loess or clay with a sand content is used for naturally slurrying, and when the clay prepared mud is found to be unsatisfactory during construction, soda ash and sodium hydroxide are added into the mud.
6. The method for preparing the slurry for the mud-protecting wall-type cast-in-situ bored pile according to claim 5, wherein when the geological conditions and the construction conditions are poor, the slurry is prepared by using calcium bentonite with good performance, the slurry is mixed into the coarse sand layer in a proportion of 12-15kg per 100L of water, and then 0.8kg of hydroxymethyl cellulose and 0.3kg of soda are added into the slurry.
7. The method for preparing the slurry of the mud-protecting wall-type cast-in-situ bored pile according to claim 1, wherein the amount of the bentonite is 5-11% of the amount of the water.
8. The method as claimed in claim 1, wherein the bentonite is present in an amount of 5% based on the geological condition of the clay soil.
9. The method for preparing mud for a mud retaining wall type cast-in-situ bored pile according to claim 1, wherein sampling and measuring the mud at corresponding time and position is required for better controlling the performance index of the mud for wall protection during the construction process, and the three positions of the upper part, the middle part and the bottom part are sampled to measure each performance of the mud.
10. A method of formulating a slurry for a mud-backed bored pile according to claim 1, wherein the bentonite has a main component of montmorillonite.
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| CN202210596879.5A CN114790092A (en) | 2022-05-30 | 2022-05-30 | Method for preparing slurry of slurry retaining wall type cast-in-situ bored pile |
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| CN202210596879.5A CN114790092A (en) | 2022-05-30 | 2022-05-30 | Method for preparing slurry of slurry retaining wall type cast-in-situ bored pile |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102757199A (en) * | 2012-07-10 | 2012-10-31 | 捷高科技（苏州）有限公司 | Polymer and bentonite drilling mud |
| CN106433586A (en) * | 2016-07-29 | 2017-02-22 | 中航勘察设计研究院有限公司 | Organic slurry used for hole-boring cast-in place pile wall protection, and production method thereof |
| CN110066661A (en) * | 2019-04-23 | 2019-07-30 | 中铁四局集团有限公司 | A kind of round gravel stratum deep big foundation pit diaphram wall slurry coat method and its configuration method |
| CN113502148A (en) * | 2021-06-30 | 2021-10-15 | 句容康泰膨润土有限公司 | Bentonite for drilling mud material and production method thereof |
-
2022
- 2022-05-30 CN CN202210596879.5A patent/CN114790092A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102757199A (en) * | 2012-07-10 | 2012-10-31 | 捷高科技（苏州）有限公司 | Polymer and bentonite drilling mud |
| CN106433586A (en) * | 2016-07-29 | 2017-02-22 | 中航勘察设计研究院有限公司 | Organic slurry used for hole-boring cast-in place pile wall protection, and production method thereof |
| CN110066661A (en) * | 2019-04-23 | 2019-07-30 | 中铁四局集团有限公司 | A kind of round gravel stratum deep big foundation pit diaphram wall slurry coat method and its configuration method |
| CN113502148A (en) * | 2021-06-30 | 2021-10-15 | 句容康泰膨润土有限公司 | Bentonite for drilling mud material and production method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 李粮纲等: "《基础工程施工技术》", 31 May 2001, 中国地质大学出版社 * |
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