CN108677921A - Anti-floating anchor rod advanced reinforcing drilling and wall protecting method based on microbial grouting technology - Google Patents
Anti-floating anchor rod advanced reinforcing drilling and wall protecting method based on microbial grouting technology Download PDFInfo
- Publication number
- CN108677921A CN108677921A CN201810264100.3A CN201810264100A CN108677921A CN 108677921 A CN108677921 A CN 108677921A CN 201810264100 A CN201810264100 A CN 201810264100A CN 108677921 A CN108677921 A CN 108677921A
- Authority
- CN
- China
- Prior art keywords
- soil
- anchor rod
- hole
- culture
- situ
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000005553 drilling Methods 0.000 title claims abstract description 28
- 238000007667 floating Methods 0.000 title claims abstract description 12
- 230000000813 microbial effect Effects 0.000 title claims description 8
- 238000005516 engineering process Methods 0.000 title abstract description 5
- 230000003014 reinforcing effect Effects 0.000 title 1
- 239000002689 soil Substances 0.000 claims abstract description 81
- 241000894006 Bacteria Species 0.000 claims abstract description 34
- 238000011065 in-situ storage Methods 0.000 claims abstract description 34
- 108010046334 Urease Proteins 0.000 claims abstract description 25
- 244000005700 microbiome Species 0.000 claims abstract description 23
- 238000007711 solidification Methods 0.000 claims abstract description 19
- 230000008023 solidification Effects 0.000 claims abstract description 19
- 230000002787 reinforcement Effects 0.000 claims abstract description 15
- 230000008569 process Effects 0.000 claims abstract description 13
- 238000004873 anchoring Methods 0.000 claims abstract description 10
- 230000033558 biomineral tissue development Effects 0.000 claims abstract description 9
- 238000006243 chemical reaction Methods 0.000 claims abstract description 9
- 230000008901 benefit Effects 0.000 claims abstract description 6
- 239000007788 liquid Substances 0.000 claims description 35
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims description 26
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 19
- 239000004202 carbamide Substances 0.000 claims description 19
- 238000002347 injection Methods 0.000 claims description 17
- 239000007924 injection Substances 0.000 claims description 17
- 238000007569 slipcasting Methods 0.000 claims description 14
- 235000019270 ammonium chloride Nutrition 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 13
- 229940041514 candida albicans extract Drugs 0.000 claims description 12
- 239000012138 yeast extract Substances 0.000 claims description 12
- 239000002002 slurry Substances 0.000 claims description 11
- 239000011435 rock Substances 0.000 claims description 9
- 239000007790 solid phase Substances 0.000 claims description 8
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 7
- 239000001110 calcium chloride Substances 0.000 claims description 7
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 7
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 4
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000011575 calcium Substances 0.000 claims description 4
- 229960005069 calcium Drugs 0.000 claims description 4
- 229910052791 calcium Inorganic materials 0.000 claims description 4
- 239000011083 cement mortar Substances 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 239000000243 solution Substances 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- NKWPZUCBCARRDP-UHFFFAOYSA-L calcium bicarbonate Chemical compound [Ca+2].OC([O-])=O.OC([O-])=O NKWPZUCBCARRDP-UHFFFAOYSA-L 0.000 claims description 2
- 229910000020 calcium bicarbonate Inorganic materials 0.000 claims description 2
- FUFJGUQYACFECW-UHFFFAOYSA-L calcium hydrogenphosphate Chemical compound [Ca+2].OP([O-])([O-])=O FUFJGUQYACFECW-UHFFFAOYSA-L 0.000 claims description 2
- MKJXYGKVIBWPFZ-UHFFFAOYSA-L calcium lactate Chemical compound [Ca+2].CC(O)C([O-])=O.CC(O)C([O-])=O MKJXYGKVIBWPFZ-UHFFFAOYSA-L 0.000 claims description 2
- 239000001527 calcium lactate Substances 0.000 claims description 2
- 229960002401 calcium lactate Drugs 0.000 claims description 2
- 235000011086 calcium lactate Nutrition 0.000 claims description 2
- 235000019700 dicalcium phosphate Nutrition 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- 235000019994 cava Nutrition 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 6
- 239000001963 growth medium Substances 0.000 abstract description 4
- 230000006378 damage Effects 0.000 abstract description 3
- 230000005284 excitation Effects 0.000 abstract description 2
- 238000005192 partition Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 10
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 239000004576 sand Substances 0.000 description 4
- 239000004568 cement Substances 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- 238000002955 isolation Methods 0.000 description 3
- 101150054854 POU1F1 gene Proteins 0.000 description 2
- 229940037003 alum Drugs 0.000 description 2
- 238000009395 breeding Methods 0.000 description 2
- 230000001488 breeding effect Effects 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 239000003673 groundwater Substances 0.000 description 2
- 239000002068 microbial inoculum Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 241001070941 Castanea Species 0.000 description 1
- 235000014036 Castanea Nutrition 0.000 description 1
- 241000233866 Fungi Species 0.000 description 1
- 244000046052 Phaseolus vulgaris Species 0.000 description 1
- 235000010627 Phaseolus vulgaris Nutrition 0.000 description 1
- 241000193395 Sporosarcina pasteurii Species 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000003834 intracellular effect Effects 0.000 description 1
- 238000009629 microbiological culture Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000010412 perfusion Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 210000005239 tubule Anatomy 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/11—Improving or preserving soil or rock, e.g. preserving permafrost soil by thermal, electrical or electro-chemical means
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N1/00—Microorganisms, e.g. protozoa; Compositions thereof; Processes of propagating, maintaining or preserving microorganisms or compositions thereof; Processes of preparing or isolating a composition containing a microorganism; Culture media therefor
- C12N1/20—Bacteria; Culture media therefor
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/10—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against soil pressure or hydraulic pressure
- E02D31/12—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against soil pressure or hydraulic pressure against upward hydraulic pressure
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Biotechnology (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Organic Chemistry (AREA)
- Zoology (AREA)
- Environmental & Geological Engineering (AREA)
- Wood Science & Technology (AREA)
- Genetics & Genomics (AREA)
- Medicinal Chemistry (AREA)
- Virology (AREA)
- Biomedical Technology (AREA)
- Tropical Medicine & Parasitology (AREA)
- Microbiology (AREA)
- Soil Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Agronomy & Crop Science (AREA)
- Piles And Underground Anchors (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention belongs to the technical field of geotechnical engineering soft foundation reinforcement, and relates to an anti-floating anchor rod advanced reinforcement drilling and wall protection method based on a microorganism grouting technology, which adopts an in-situ bacteria culture scheme, utilizes soil urease bacteria naturally existing in soil to carry out in-situ excitation, utilizes a special bacteria culture medium to enable the urease bacteria in the soil to grow dominantly, and avoids potential microorganism harm brought by introducing microorganism strains into the soil from the outside; the advanced grouting process is adopted, the microorganism culture medium is injected into the surrounding soil body before the hole is opened, the microorganism mineralization process is induced after the in-situ culture of the microorganism is completed, so that the surrounding soil body is subjected to solidification reaction, and after the solidification is completed, the drilling, grouting and anchoring work of the anti-floating anchor rod are performed in sequence, so that a partition plate is not required to be placed into the drilling hole, the construction cost is reduced, and the construction efficiency is improved; the method has the advantages of simple process, convenience in operation, low cost, strong practicability and high construction efficiency, and can protect the underground water layer and the environment while improving the anchoring performance of the anti-floating anchor rod.
Description
Technical field：
The invention belongs to the flabbiness ground strengthened technical fields of geotechnical engineering, are related to a kind of weak loose for deep-foundation pit engineering
Anti-float anchor rod borehole wall-protection in soil structures and reinforcement means, especially a kind of anti-float anchor rod based on microorganism slurry injection technique
Advance reinforcement borehole wall-protection method.
Background technology：
It is promoted with the acceleration of China's Development of China's Urbanization, the national economic development and the continuous improvement of people's lives demand, ground
The utilization depth built highly with urban underground space more than face built is increasing, and adjoint problem is that foundation pit is opened
Digging depth is dramatically increased with the basic depth of burying.Coastal region since level of ground water is higher, structural load irresistibly under
When the buoyancy of water, will produce basement bottom board protuberance causes coal seam floor failure or hypogee integrally to float to cause at bean column node
The breakoff phenomenons such as cracking, former destroy especially common in skyscraper.For the anti-floating problem of underground engineering, ballast is commonly used
The means such as method, anti-floating pile or anti-float anchor rod solve, however, compared to anti-float anchor rod, ballast method and anti-floating pile method cost are higher, increase
Construction cost is added.Therefore, solve the problems, such as that Underground Building for Anti-floating in terms of economy, has significant advantage using anti-float anchor rod.
But since Tall Building Foundation is deeper, level of ground water is higher, constructs rich in the anti-float anchor rod under underground water geological conditions, often
The first drilling of rule, the construction technology of grouting behind shaft or drift lining, for weak soil or broken Rock And Soil, since collapse hole phenomenon easily occurring after pore-forming,
Cause slip casting process that can not be normally carried out, or seriously affect anti-floating effect, threatens to engineering safety；In traditional sand seam geology
Anti-float anchor rod construction, mostly use mud off pore-forming and casing pipe hole forming work technique, hole wall collapse phenomenon easily occur, or because of scene
Major diameter casing pipe hole forming equipment cannot be provided, cause drilling quality that can not ensure, and this method construction cost is higher, efficiency, ring
Protect etc. there are problems that.CN1053686432A discloses a kind of microorganism soil-fixing retaining wall cast-in-situ bored pile and construction party
Method, its implementation are：The microbial inoculum that Bacillus pasteurii S.pasteurii and culture solution form is noted after drill hole of drilling machine
Enter drilling, diffuses to ground around, isolation board is then put into drilling, inject cementing solution, generation is reacted with microbial inoculum
Calcium carbonate crystal, solidification drilling surrounding soil, but need to be put into isolation board into drilling, cost is increased, construction is reduced
Efficiency；CN103510507A discloses a kind of mud off construction method of drill-pouring make-up sandy soils pore-forming, its implementation
For:Before construction, the viscous swelled ground of height and industrial alum mixing are prepared mud off by stock tank of dredging in advance, when drilling construction extremely
When sandy soils, the mud injection hole that has prepared is extracted by mud chestnut and carries out retaining wall, after drilling through sandy soils, pass through to
Increase clear water in hole, reduce mud balance to 1.1-1.25, until pore-forming is completed, this method is using industrial alum and high viscous expansion
The mud that soil is mixed, polluted underground water source serious to environmental disruption, and it is very big to human injury, in addition, mud only serves
Balancing earth pressure power retaining wall, dross effect, do not reinforce sandy soils, when sandy soils are thicker, mud off is unable to device to hole
Wall is effectively reinforced, and drilling partial collapse is be easy to cause；CN104120716A discloses a kind of holing with slurry wall protection perfusion
Make-up construction method, its implementation are:Mud materials are mixed together using clay, bentonite, dispersant, thickener, if
Circulatory pool, pulp storage tank and sedimentation basin are set as mud circulating system, injection mud is formed constantly into hole during drilling
Borehole wall-protection prevents collapse hole, and the mud off method which uses is only applicable to the preferable clay foundation of soil property, for sand
Soil, silt foundation are unfavorable for retaining wall if mud balance is too small, be easy to cause collapse hole；Mud balance is excessive, it will increases and bores
Bar steering resistance causes make-up body to press from both sides mud, influences into make-up quality and rate of penetration, and mud only serves retaining wall, dross effect, Er Qiesuo
The mud circulating system of use increases difficulty of construction, reduces working efficiency.Therefore, there is an urgent need to design a kind of safe, warp
Ji, environmental protection, efficient anti-float anchor rod borehole wall-protection method, make it that will generate great engineering application value.
Invention content：
It is an object of the invention to overcome the weak loose ground of shortcoming and deficiency of the existing technology, especially deep basal pit
The problems such as collapse hole or difficult pore-forming that layer anti-float anchor rod construction faces, design provides a kind of microorganism advance reinforcement wall protecting method,
Using microorganism slurries before pore-forming advance reinforcement hole Zhou Tuti, microorganism slurries chain induction microbial mineralization mistake after pore-forming
Journey makes its mineralization process product be merged with cement (sand) slurry reaction, further promotes anchor pole anti-floating performance, increases anti-float anchor rod
Reinforce coverage.
To achieve the goals above, the present invention realizes that the detailed process of anti-float anchor rod advance reinforcement borehole wall-protection is：
(1) intend leading along hole Zhou Bushe 4-8 root pre-groutings are small at bore position in anti-float anchor rod before anti-float anchor rod drilling
Pipe, periphery Rock And Soil is injected into using grouting pump by the Culture in situ liquid of edaphon urase bacterium by grouting small pilot pipe
In；
(2) it is waited for 24-168 hours after the Culture in situ liquid of injection microorganism urease bacterium, allows soil urease bacterium original position advantage
Soil solidification liquid is injected into ground by breeding when soil urease liveness reaches 0.1u/g soil or more by slip casting ductule
In body, the soil urease bacterium of Culture in situ is chemically reacted by microbial mineralization process and the solidify liquid of injection soil in advance
12-48 hours, generate flocculence carbonate solid phase cementitious material.This solid phase cementitious material is filled into Rock And Soil hole, and
Loose ground particle is bonded, Rock And Soil is made to have certain strength and stability, completes grouting small pilot pipe slip casting；
(3) after the completion of grouting small pilot pipe slip casting, drilling machine is started using the prior art and carries out anti-float anchor rod drilling, it is in situ
The solid phase cementitious material that the soil urea mould of culture generates after being reacted with solidify liquid is effectively anti-to the solidification of hole wall soil particle
Caving in for hole wall is stopped；
(4) after the completion of drilling, anti-float anchor rod is transferred, and cement mortar is injected in hole, cement mortar anti-floating anchor in anchor hole
While bar, secondary chemical reaction occurs with the flocculence carbonate solid phase cementitious material in hole week, it is compound to form cement-carbonate
Cementitious material further expands the anchoring radius of anti-float anchor rod, promotes anchoring property, realizes anti-float anchor rod advance reinforcement drilling shield
Wall.
The Culture in situ liquid of edaphon urase bacterium of the present invention includes yeast extract 2-40g/L, ammonium chloride 1-
10g/L and urea 1-20g/L, is mixed into solution by yeast extract, ammonium chloride and urea and adjusts its ph value and be prepared into for 8-10
To the Culture in situ liquid of edaphon urase bacterium.
Soil solidification liquid of the present invention includes urea 6-120g/L and calcium chloride 11-222g/L, and wherein calcium chloride can be by
Other calcium sources replace, other calcium sources include calcium lactate, calcium bicarbonate and calcium monohydrogen phosphate, and added amount of substance has with added calcium chloride
Identical molal weight.
Grouting small pilot pipe of the present invention is processed into using seamless steel pipe, and the front end of grouting small pilot pipe is pointed
Structure, grouting small pilot pipe open up injected hole in the half side wall section away from bolthole along hole depth direction every 1m, protect
The soil body in the Culture in situ liquid of the most of edaphon urase bacterium of card and soil solidification liquid injection hole Zhou Tuti rather than hole.
Along the slip casting of grouting small pilot pipe after the Culture in situ liquid injection of edaphon urase bacterium of the present invention
Hole flows into anti-float anchor rod hole Zhou Tuti, and urase bacterium existing for original position cultivates dominant growth under the stimulation at night in situ in soil,
The breeding in situ of the 24-168 hours of process, soil urease liveness reach every gram of soil of 0.1u or more, show that soil urease bacterium is dense
Degree and activity are suitable for progress microorganism slip casting solidification.
Soil solidification liquid of the present invention is flowed into along the injected hole of grouting small pilot pipe in anti-float anchor rod hole Zhou Tuti,
And reaction forms cementitious material, all loose Rock And Soils in solidification hole in 12-48 hours, and the soil body will not be by too big shadow in hole
It rings, is still weak loose media.
Compared with prior art, the present invention haing the following advantages：First, using Bacteria Culture scheme in situ, using in soil
Naturally occurring soil urease bacterium carries out excitation in situ makes the urase bacterium advantage in soil give birth to using distinctive bacteria culture media
It is long, reach and meet microbial activity concentration needed for microbial mineralization, avoids and introduce microorganism fungus kind institute into soil from the external world
The potential harms of microbe brought；Second is that using pre-grouting technique, microbiological culture media is injected into surrounding soil before trepanning, is waited for
After the completion of microorganism in situ culture, starting induction microbial mineralization process makes surrounding soil be cured reaction, completion to be solidified
Afterwards, the drilling, slip casting and work of casting anchor of anti-float anchor rod reduce construction cost without isolation board is put into drilling successively, and
Improve construction efficiency；Its is simple for process, easy to operate, at low cost, highly practical, and construction efficiency is high, is promoting anti-float anchor rod
Water table, environmental protection can be protected while anchoring property.
Description of the drawings：
Fig. 1 is the application example principle schematic of the present invention.
Fig. 2 is the operation principle structural schematic diagram of grouting small pilot pipe of the present invention.
Fig. 3 is the injected hole distribution map and soil stabilization principle schematic of advanced tubule of the present invention.
It is ferment that Fig. 4, which is that different Culture in situ liquid induce soil urea mould and urease activity, wherein ■ in the embodiment of the present invention 1,
Female medicinal extract 40g/L, ammonium chloride 10g/L, urea 10g/L, are yeast extract 20g/L, ammonium chloride 10g/L, urea 10g/L, ●
For yeast extract 10g/L, ammonium chloride 5g/L, urea 5g/L, ◆ it is yeast extract 10g/L, ammonium chloride 1g/L, urea 1g/L, ▲
For yeast extract 2g/L, ammonium chloride 10g/L, urea 10g/L.
Specific implementation mode：
The invention will be further described by way of example and in conjunction with the accompanying drawings.
Embodiment 1：
The present embodiment be used for deep basal pit 1 in 2 borehole wall-protection of anti-float anchor rod around Culture in situ urase microorganism include with
Lower step：
(1) yeast extract, ammonium chloride and urea are configured to the soil urease bacterium Culture in situ liquid that pH value is 9.5, wherein
Yeast extract content is 2-40g/L, and ammonium chloride content is 1-10g/L, urea content 1-20g/L；
(2) seamless steel pipe processing and fabricating grouting small pilot pipe 4 is used, the Front-end Design of grouting small pilot pipe 4 is point
Shape structure 5 opens up an injected hole 6 on 4 tube wall of grouting small pilot pipe along depth direction every 1m, and injected hole 6 is only set
In the half region of tube wall, it is arranged away from bolthole 7 and on the tube wall towards hole Zhou Tuti 8；
(3) along all 3 uniformly distributed 4-8 roots grouting small pilot pipes 4 in the hole in anti-float anchor rod hole；
(4) pre-grouting before anti-float anchor rod 2 drills is carried out, soil urease bacterium Culture in situ liquid is small along pre-grouting
Conduit 4 injects, and the injected hole 6 on 4 tube wall of grouting small pilot pipe keeps the diffusion path 9 of soil urease bacterium Culture in situ liquid main
In hole Zhou Tuti 8 or near hole week 3, urease activity in soil-like testing soil is taken respectively after waiting for 24-168 hours, is tested
The results are shown in Figure 4, from the results, it was seen that urase activity with Culture in situ liquid component it is closely related, while with when
Between increase, activity first increases and reduces afterwards, shows that the long Culture in situ time instead results in the destruction of soil urease liveness,
Middle main cause is that urase bacterium is dead with the reduction of nutriment, so as to cause the reduction of intracellular urease activity.
Embodiment 2:
The present embodiment is used for 2 borehole wall-protection of anti-float anchor rod in deep basal pit 1 and slip casting anchoring, specifically includes following steps：
(1) yeast extract, ammonium chloride and urea are configured to the soil urease bacterium Culture in situ liquid that pH value is 9.5, wherein
Yeast extract content is 2-40g/L, and ammonium chloride content is 1-10g/L, urea content 1-20g/L；
(2) seamless steel pipe processing and fabricating grouting small pilot pipe 4 is used, the Front-end Design of grouting small pilot pipe 4 is point
Shape structure 5 opens up an injected hole 6 on 4 tube wall of grouting small pilot pipe along depth direction every 1m, and injected hole 6 is only set
In the half region of tube wall, it is arranged away from bolthole 7 and on the tube wall towards hole Zhou Tuti 8；
(3) along all 3 uniformly distributed 4-8 roots grouting small pilot pipes 4 in the hole in anti-float anchor rod hole；
(4) pre-grouting before anti-float anchor rod 2 drills is carried out, soil urease bacterium Culture in situ liquid is small along pre-grouting
Conduit 4 injects, and the injected hole 6 on 4 tube wall of grouting small pilot pipe keeps the diffusion path 9 of soil urease bacterium Culture in situ liquid main
In hole Zhou Tuti 8 or near hole week 3, in a small amount of ostium in the soil body 7, but influence less, to take soil-like to survey after waiting for 72 hours
Urease activity in soil is tried, every gram of soil of 0.3u is reached；
(5) the soil solidification liquid for including 60g/L urea and 111g/L calcium chloride is injected by grouting small pilot pipe 4, etc.
It waits for making it fully react with soil urease bacterium in 24 hours, generates microorganism slip casting gum material calcium carbonate；Then every 24 hours
Above-mentioned soil solidification liquid is injected, injects 3 times altogether, the periphery soil body in hole week 3 is made gradually to cure, completes pre-grouting；Soil solidification
The injection of liquid effectively inhibits caving in for hole Zhou Tuti 8, has ensured being smoothed out for the decentralization of follow-up anchor pole and cement injection.
(6) pre-grouting work terminates, and waits for that the soil body is completed with edaphon urase bacterium and soil solidification liquid curing reaction
Start drilling machine 10 afterwards to drill to anti-float anchor rod；
(7) slip casting is carried out after the completion of anti-float anchor rod drilling, re-injects soil solidification liquid, chain induction microbial mineralization mistake
Journey makes the mineralization process product in hole Zhou Tuti 8 be merged with cement (sand) slurry reaction, further increases the strong of hole Zhou Tuti 8
Degree so that the anchoring radius of anti-float anchor rod increases to 12 by 11, hence it is evident that promotes its anchoring property.
Claims (4)
1. a kind of anti-float anchor rod advance reinforcement borehole wall-protection method based on microorganism slurry injection technique, it is characterised in that realize anti-floating
The detailed process of anchor pole advance reinforcement borehole wall-protection is：
(1) intend at bore position along hole Zhou Bushe 4-8 root grouting small pilot pipes, profit in anti-float anchor rod before anti-float anchor rod drilling
The Culture in situ liquid of edaphon urase bacterium is injected by grouting small pilot pipe in the Rock And Soil of periphery with grouting pump；
(2) it is waited for 24-168 hours after the Culture in situ liquid of injection microorganism urease bacterium, soil urease bacterium original position advantage is allowed to breed,
When soil urease liveness reaches 0.1u/g soil or more, soil solidification liquid is injected into Rock And Soil by slip casting ductule,
The soil urease bacterium of Culture in situ carries out chemical reaction 12-48 by microbial mineralization process and the solidify liquid of injection soil in advance
Hour, generate flocculence carbonate solid phase cementitious material.This solid phase cementitious material is filled into Rock And Soil hole, and will be loose
Ground particle bond, so that Rock And Soil is had certain strength and stability, complete grouting small pilot pipe slip casting；
(3) after the completion of grouting small pilot pipe slip casting, drilling machine is started using the prior art and carries out anti-float anchor rod drilling, Culture in situ
Soil urea mould reacted with solidify liquid after the solid phase cementitious material that generates the solidification of hole wall soil particle is effectively prevented
Hole wall caves in；
(4) after the completion of drilling, anti-float anchor rod is transferred, and cement mortar is injected in hole, cement mortar anti-float anchor rod in anchor hole
Meanwhile secondary chemical reaction occurs with the flocculence carbonate solid phase cementitious material in hole week, form cement-carbonate plural gel
Material further expands the anchoring radius of anti-float anchor rod, promotes anchoring property, realizes anti-float anchor rod advance reinforcement borehole wall-protection.
2. the anti-float anchor rod advance reinforcement borehole wall-protection method based on microorganism slurry injection technique according to claim 1, special
Sign is that the Culture in situ liquid of the edaphon urase bacterium includes yeast extract 2-40g/L, ammonium chloride 1-10g/L and urea
1-20g/L, it is that edaphon is prepared in 8-10 that yeast extract, ammonium chloride and urea, which are mixed into solution, and adjust its ph value
The Culture in situ liquid of urase bacterium.
3. the anti-float anchor rod advance reinforcement borehole wall-protection method based on microorganism slurry injection technique according to claim 1, special
Sign is that the soil solidification liquid includes urea 6-120g/L and calcium chloride 11-222g/L, and wherein calcium chloride can be by other calcium sources
Instead of other calcium sources include calcium lactate, calcium bicarbonate and calcium monohydrogen phosphate, and added amount of substance has identical mole with added calcium chloride
Quality.
4. the anti-float anchor rod advance reinforcement borehole wall-protection method based on microorganism slurry injection technique according to claim 1, special
Sign is that the grouting small pilot pipe is processed into using seamless steel pipe, and the front end of grouting small pilot pipe is pointed structures, is surpassed
Preceding slip casting ductule opens up injected hole in the half side wall section away from bolthole along hole depth direction every 1m, ensures most of
The soil body in the Culture in situ liquid of edaphon urase bacterium and soil solidification liquid injection hole Zhou Tuti rather than hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810264100.3A CN108677921A (en) | 2018-03-28 | 2018-03-28 | Anti-floating anchor rod advanced reinforcing drilling and wall protecting method based on microbial grouting technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810264100.3A CN108677921A (en) | 2018-03-28 | 2018-03-28 | Anti-floating anchor rod advanced reinforcing drilling and wall protecting method based on microbial grouting technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108677921A true CN108677921A (en) | 2018-10-19 |
Family
ID=63800463
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810264100.3A Pending CN108677921A (en) | 2018-03-28 | 2018-03-28 | Anti-floating anchor rod advanced reinforcing drilling and wall protecting method based on microbial grouting technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108677921A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109811745A (en) * | 2019-02-22 | 2019-05-28 | 河海大学 | A kind of soil in-situ priming device and its application method |
| CN111910626A (en) * | 2020-08-13 | 2020-11-10 | 卓辉（福建）建设工程有限公司 | Construction process of soil anchor rod |
| CN113185981A (en) * | 2021-04-12 | 2021-07-30 | 三峡大学 | Urease reinforcing liquid for slope protection and preparation and construction method thereof |
| CN113512510A (en) * | 2021-05-07 | 2021-10-19 | 长江大学 | Application of glucose in delaying mineralization of urease-producing bacteria |
| CN114135294A (en) * | 2021-08-24 | 2022-03-04 | 重庆大学 | Advanced grouting reinforcement method for red sandstone tunnel |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106837237A (en) * | 2016-07-18 | 2017-06-13 | 重庆交通大学 | A kind of coal rock layer of body containing weak structure solidification forming hole method |
| CN107059838A (en) * | 2016-12-29 | 2017-08-18 | 河海大学 | Grouting device and grouting method for sandy land |
-
2018
- 2018-03-28 CN CN201810264100.3A patent/CN108677921A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106837237A (en) * | 2016-07-18 | 2017-06-13 | 重庆交通大学 | A kind of coal rock layer of body containing weak structure solidification forming hole method |
| CN107059838A (en) * | 2016-12-29 | 2017-08-18 | 河海大学 | Grouting device and grouting method for sandy land |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109811745A (en) * | 2019-02-22 | 2019-05-28 | 河海大学 | A kind of soil in-situ priming device and its application method |
| CN111910626A (en) * | 2020-08-13 | 2020-11-10 | 卓辉（福建）建设工程有限公司 | Construction process of soil anchor rod |
| CN113185981A (en) * | 2021-04-12 | 2021-07-30 | 三峡大学 | Urease reinforcing liquid for slope protection and preparation and construction method thereof |
| CN113512510A (en) * | 2021-05-07 | 2021-10-19 | 长江大学 | Application of glucose in delaying mineralization of urease-producing bacteria |
| CN114135294A (en) * | 2021-08-24 | 2022-03-04 | 重庆大学 | Advanced grouting reinforcement method for red sandstone tunnel |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108677921A (en) | Anti-floating anchor rod advanced reinforcing drilling and wall protecting method based on microbial grouting technology | |
| CN105386433B (en) | A kind of microorganism soil-fixing CFG pile composite foundations and construction method | |
| CN105386436B (en) | A kind of microorganism soil-fixing constraint discrete material pile composite foundation and construction method | |
| CN110230309A (en) | Karst region bridge solution cavity pile base construction method | |
| CN105386432B (en) | A kind of microorganism soil-fixing retaining wall cast-in-situ bored pile and construction method | |
| CN103321244B (en) | Sand foundation existing building sets up the construction method of basement | |
| CN105735245B (en) | The soil stabilization method of trenching construction in the hydraulic reclamation mud layer stratum of seashore | |
| CN102660952B (en) | Controllable clay paste slurry grouting technique | |
| CN103437339A (en) | Construction method for sealing karst cave near trench wall of underground continuous wall in karst stratum | |
| CN103031839A (en) | Construction method of hand-dug piles | |
| CN107023026A (en) | A kind of sealing bottom type caisson wall and construction method | |
| CN109440757A (en) | A kind of foundation reinforcement method for karst region | |
| CN108867673A (en) | A kind of underwater prevention method in the foundation pit based on the curtain that draws water | |
| CN109252433A (en) | Method soft soil foundation intensive treatment construction and reinforce soft soil foundation foundation pit | |
| CN110230314B (en) | Pile foundation structure and construction method thereof | |
| CN110685272A (en) | Method for treating soft foundation settlement overrun by utilizing inclined-hole cloth bag pile | |
| CN105926589B (en) | It is adapted to the steel-pipe pile and its grouting method of coral reef geology | |
| CN113174933B (en) | Microorganism-induced calcium carbonate precipitation gravel composite pile reinforcing structure and construction method | |
| CN105971637A (en) | Application of WSS construction method in shield end reinforcement of water-rich sand layer | |
| CN110241837A (en) | A kind of construction method for preventing basement bottom board from cracking under high artesian geological conditions | |
| CN206800431U (en) | A kind of sealing bottom type caisson wall | |
| CN205576990U (en) | Cross section and wear bridge pier tunnel slip casting supporting construction | |
| CN206090520U (en) | Solid native dado drilling bored concrete pile of microorganism | |
| CN105862725A (en) | Underground construction preliminary grouting waterproof and anti-seepage supporting technology | |
| CN110144871A (en) | A kind of dark creek processing construction method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181019 |