CN103951320A - Mix proportion design method of seawater slurry with stable wall retaining property - Google Patents
Mix proportion design method of seawater slurry with stable wall retaining property Download PDFInfo
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Abstract
The invention provides a mix proportion design method of seawater slurry with stable wall retaining property. The method comprises the following steps: I, selecting a raw material, II, designing a three-factor five-level orthogonal test scheme, III, preparing 25 groups of seawater slurry, IV, testing the specific gravity, the viscosity, the power of hydrogen, the water loss rate and the slurry surface thickness of each group of the seawater slurry, V, analyzing the testing result, and confirming the optimal factor and level combination, thereby obtaining an optimal mix proportion of the seawater slurry with the stable wall retaining property. Compared with the prior art, through selection on raw materials and design of the mix proportion, the method achieves the purpose of improving the stability of the seawater slurry, especially the wall retaining property of the seawater slurry. In addition, by optimizing indexes such as the specific gravity, viscosity, pH value, water loss rate and slurry surface thickness of the seawater slurry, the collapse of porous walls and the seepage of underground water are effectively prevented, and the wall retaining property of the seawater slurry is remarkably stable.
Description
Technical field
The invention belongs to Offshore Bridges pile foundation cast-in place pile Mud Technology field, be specifically related to a kind of mixing proportion design method of sea-water mud of retaining wall stable performance.
Background technology
The bridge spanning the sea that China builds is at present more and more, under ocean environment, Construction of Pile Bedding Boring need to be prepared a large amount of mud, premium mud is the key factor that guarantees pile foundation quality, the limitation of the fresh water configuration mud that current specifications requires under ocean environment: (1) fresh water is subject to the restriction in place and the restriction of transportcapacity in storage, transportation, affect construction speed, increased construction cost; (2) mud that adopts fresh water to prepare still can be subject to the pollution of seawater, affects the performance of mud; (3) fresh water is prepared in mud process and is needed to supply a large amount of fresh water, will greatly reduce operating efficiency thus, increases construction cost.Therefore, gather materials on the spot for convenience, reduce construction cost, improve operating efficiency, adopting sea-water mud is one of gordian technique that under ocean environment, large bridge pile foundation construction need to be considered.
At present, traditional sea-water mud mix-design has only considered to exist in seawater a large amount of Ca
2+, Mg
2+, Na
+, Cl
-plasma, has ignored the variation of the ionic concn that seawater causes due to tidal phenomena, and when adopting the seawater of different steps to prepare mud, the performance index deformability of mud is very large.In addition, traditional sea-water mud mix-design with reference to water mud performance index as checking index, lack for relevant ionic concn in seawater and change the impact analysis to mud off performance, lack a kind of ebb tide sea-water mud composition and division in a proportion method of design of retaining wall stable performance.Therefore,, in sea-water mud mix-design process, must consider the impact on sea-water mud retaining wall performance index and proportioning thereof of seawater intermediate ion concentration and Changing Pattern thereof.
In addition, when directly preparing mud with seawater, sodium bentonite and seawater mix can cohesion and precipitate and separate, and the direct pulping colloidity of seawater is low, poor stability, retaining wall poor performance.Therefore with seawater, prepare mud, must select suitable mud tackifier and dispersion agent, the stability of sea-water mud is met the demands, realize the infiltration of caving in underground water that it prevents hole wall, strengthen the retaining wall effect of mud.
On the whole, water mud mixing proportion design method is time-consuming, effort, investment are large, sea-water mud is gathered materials on the spot, and without the special advantages such as pulping equipment, but need to overcome, changes the shortcomings such as the mud stability causing is poor, colloidity is low, retaining wall poor performance due to seawater ionic concn.Therefore, need badly and overcome above-mentioned mud property poor stability, the bad shortcoming of retaining wall performance especially, provides a kind of ebb tide sea-water mud mixing proportion design method of retaining wall stable performance.
Summary of the invention
Technical problem to be solved by this invention is, for above-mentioned the deficiencies in the prior art, to provide a kind of mixing proportion design method of sea-water mud of retaining wall stable performance.The method is according to the requirement to mud off in Practical Project, and in conjunction with execution conditions and raw-material feature, by orthogonal test, determine the ratio of ebb tide sea, clay for preparing mud, tackifier and dispersion agent, the sea-water mud that stability is strong, retaining wall performance is high is prepared in design, and improved the index of controlling mud off performance, guaranteeing, on the basis of engineering adaptability, to there is significant economic benefit, social benefit, environmental benefit and technical benefits.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of mixing proportion design method of sea-water mud of retaining wall stable performance, it is characterized in that, and the method comprises the following steps:
Step 1, selection starting material:
A. seawater: select ebb tide phase natural sea-water;
B. clay for preparing mud: selecting sodium bentonite is clay for preparing mud;
C. tackifier: selecting polyacrylamide is tackifier;
D. dispersion agent: selecting soda ash is dispersion agent;
Step 2, the proportioning of sea-water mud is carried out to orthogonal experimental design:
Mass ratio at seawater, clay for preparing mud, tackifier and dispersion agent is 1000: (110～190): (0.005～0.025): under the working condition of (2～4), selecting clay for preparing mud, tackifier and dispersion agent is variable factor, each variable factor is all chosen five number of levelss, designs thus three factor five horizontal quadrature testing programs;
Step 3, according to the design requirements of three factor five horizontal quadrature testing programs described in step 2, prepare 25 groups of sea-water muds, described in 25 groups, sea-water mud all prepares by step 301～304:
Step 301, take seawater, clay for preparing mud, tackifier and dispersion agent respectively;
Step 302, by part heating of seawater to 65 ℃～80 ℃, then the tackifier after taking in step 301 are dispersed in the part seawater after heating, obtain mixing solutions; The quality of described part seawater is 30% of seawater total mass after taking in step 301;
Step 303, by the clay for preparing mud crushed after being dried after taking in step 301, then that the dispersion agent mix after taking in the clay for preparing mud after pulverizing and step 301 is even, obtain native alkali mixture;
Step 304, native alkali mixture described in mixing solutions described in step 302, step 303 is mixed to rear standing 24h～30h with residual seawater, under the condition that is then 30r/min～40r/min in stir speed (S.S.), stir 40min, obtain sea-water mud;
Step 4, according to the requirement of highway bridge and culvert construction technique normalizing, proportion, viscosity, potential of hydrogen, percentage of water loss and the mudcake thickness of sea-water mud described in 25 groups are all tested, to evaluate the retaining wall performance of respectively organizing sea-water mud;
Step 5, the resulting test result of step 4 is analyzed, obtain clay for preparing mud, tackifier and dispersion agent for the impact of the retaining wall performance of sea-water mud, final definite optimum level of factor combines, thereby obtains the optimum mix of the sea-water mud of retaining wall stable performance.
The mixing proportion design method of the sea-water mud of above-mentioned a kind of retaining wall stable performance, is characterized in that, the colloidity of sodium bentonite described in step 1 is not less than 95%, and sand factor is not more than 0.3%.
The mixing proportion design method of the sea-water mud of above-mentioned a kind of retaining wall stable performance, is characterized in that, dry temperature described in step 303 is 65 ℃～80 ℃, and the described dry time is 20min.
Principle of design of the present invention is: the composition of sea-water mud of the present invention comprises sodium bentonite, and the main component of sodium bentonite is montmorillonite.Montmorillonite is to form by Si-Al-Si three-decker is overlapping, and its atypic plate-like surface is Liquidity limit very easily.Sodium bentonite has thixotropic property, bulking performance and colloidal property.After sodium bentonite and sea water mixing, because the expansion of sodium bentonite makes liquid viscosity, increase, under static condition, sodium bentonite Fibre Suspensions diminishes, but after stirring, can recover again original mobility (thixotropy).Sodium bentonite adds after sea water mixing, and seawater will soon enter between the lattice of montmorillonite, produces significant bulking.Bulking degree is different according to the different ions of montmorillonite surface adsorption.Sodium bentonite particle after bulking, just becomes a kind of electronegative hydrophilic colloid in water, thereby makes sodium bentonite particle keep the suspended state disperseing, and forms mud.
The present invention compared with prior art has the following advantages:
1, the present invention, by choosing ebb tide seawater as sea-water mud raw materials, make full use of ebb tide seawater compared with the metastable characteristic of the ionic concn of flood tide seawater, and seawater duration of fall is longer, more convenient raw-material choosing.In addition, the density of ebb tide seawater and fresh water density are comparatively approaching, the performance of sea-water mud more easy to control.
2, the present invention is by choosing sodium bentonite as ebb tide sea-water mud raw materials, and sodium bentonite is the main source of mud colloidal quality, and sodium bentonite mud skin is thin, good stability, mud yield are high.In order to increase the colloidity of mud, preferably colloidity is not less than 95%, and sand factor is not more than 0.3% sodium bentonite.
3, the present invention by adding polyacrylamide (PAM) in ebb tide sea-water mud, can change that original fluid loss is large, easily separated, poor reliability, retaining wall performance be bad, the shortcomings such as the mud skin that forms is thicker, make mud there is good thixotropy, water-retentivity, salt resistance and thinner mud skin, maintenance does not disperse, low-soild performance, improve proportion, viscosity, the pH value of mud, reduce the fluid loss of mud, can play the effect of the infiltration that prevents borehole collapse and underground water, strengthen the retaining wall effect of mud, overcome the impact of seawater ionic concn on mud property.
4, the present invention by adding soda ash (Na in ebb tide sea-water mud
2cO
3), sodium bentonite and seawater are mixed, and meeting is condensed and the phenomenon of precipitate and separate no longer occurs, the particle of sodium bentonite can be disperseed, make seawater contact more abundant with sodium bentonite particle, improve colloidity, pH value, the viscosity of mud, overcome the impact of seawater ionic concn on mud property, strengthen mud off, prevent the effect of collapse hole.In addition, add Na
2cO
3sodium bentonite particle can be disperseed, increase mud surface negative charge, with the drilling cuttings of adsorption zone positive charge, improve mud suspension drilling cuttings performance.
5, the present invention by adding PAM and Na in ebb tide sea-water mud
2cO
3, can make this mud there is following features: (1) viscosity is high.This mud viscosity is very high, and therefore corresponding colloidity is large.Like this, mud colloid forms one deck chemical films in powder fine sand, the coarse sand gravel soil body, and sealing hole wall keeps hole wall stable.(2) fluid loss is little.Generally speaking, mudcake thickness is directly proportional to filtering slurry percentage of water loss, and the low percentage of water loss of this mud makes it have the feature that mud skin is thin.(3) after pore-forming, mud skin is thin.This is an important feature of this mud.Adopt after this mud, mud cake on the wall of borehole thickness is less than 1mm, and this is that water mud is difficult to accomplish.(4) do not disperse.Mud generation throwing out after this performance makes to hole, thus make the fine particle drilling cuttings in mud further become larger particles sediment, and then easily by mechanical desanding device, removed.The specific function that drilling cuttings inferior is removed in the clay for preparing mud of this reservation high-quality of this mud, flocculation is extremely conducive to mud circulation, purification.
6, in order to reach the object of the retaining wall performance that strengthens mud, the present invention has optimized a series of sea-water mud indexs, and its index comprises: proportion, viscosity, pH, fluid loss, mud skin depth.Sea-water mud proportion increases the wall pressure that can increase hole wall, and hole wall also tends towards stability, yet sea-water mud proportion is excessive, can cause fluid loss to increase, and mud skin depth also can increase, and increases the difficulty of clear hole and grouting; Sea-water mud proportion reduces to reduce hole wall wall pressure, causes the phenomenon of hole wall collapse.The increase of sea-water mud viscosity can cause mudcake thickness to increase, to stoping groundwater seepage favourable, yet sea-water mud cross conference and cause " stick with paste and bore ", affect drill speed, increase the difficulty of sea-water mud purification; The too small meeting of sea-water mud viscosity causes mudcake thickness excessively thin, to stoping groundwater seepage unfavorable.The pH value of sea-water mud is relevant to the salinity in stake Zhou Haishui and earth, and pH rising can make hole wall surface softening, causes hole wall collapse.Sea-water mud fluid loss increases can increase mudcake thickness, and to stoping groundwater seepage favourable, yet the hole wall sea-water mud skin of the excessive formation of sea-water mud fluid loss is blocked up, easily causes collapse hole; Otherwise sea-water mud fluid loss reduces.Sea-water mud mudcake thickness increases and easily forms shrinkage cavity and collapse hole phenomenon; Sea-water mud mud skin is excessively thin, can not play the effect of retaining wall.
7, the present invention, in sea-water mud mix-design process, by selecting ebb tide seawater as the starting material of slurrying, and adds tackifier PAM and dispersion agent Na therein
2cO
3, realized the stability that strengthens mud, improve the object of the retaining wall performance of mud.In addition, the present invention has considered emphatically the retaining wall performance of ebb tide sea-water mud, proportion, viscosity, pH, fluid loss, the mud skin depth index of ebb tide sea-water mud have been optimized, effectively prevent the infiltration of caving in underground water of hole wall, strengthen the retaining wall effect of mud, and can guarantee to suspend boring mud and the ability of carrying boring mud, ocean boring construction cost reduced, reduce ocean drilling construction and interrupt, reduce ocean boring accident rate.Have easy to operate, guarantee construction quality, shorten the feature of construction period, guaranteeing, on the basis of engineering adaptability, to there is significant economic benefit, social benefit, environmental benefit and technical benefits.
Below in conjunction with drawings and Examples, the present invention is described in further detail.
Accompanying drawing explanation
Fig. 1 is the design process of mixing ratio figure of the sea-water mud of retaining wall stable performance of the present invention.
Fig. 2 is preparation technology's schema of sea-water mud of the present invention.
Fig. 3 is sodium bentonite content-sea-water mud specific gravity curve of the present invention.
Fig. 4 is sodium bentonite content-sea-water mud viscograph of the present invention.
Fig. 5 is sodium bentonite content-sea-water mud fluid loss curve of the present invention.
Fig. 6 is sodium bentonite content-sea-water mud mudcake thickness curve of the present invention.
Fig. 7 is sodium bentonite content-sea-water mud pH value curve of the present invention.
Fig. 8 is sodium bentonite content-sea-water mud colloidity curve of the present invention.
Fig. 9 is sodium bentonite content-sea-water mud sand factor curve of the present invention.
Figure 10 is PAM content-sea-water mud viscograph of the present invention.
Figure 11 is PAM content-sea-water mud fluid loss curve of the present invention.
Figure 12 is PAM content-sea-water mud mudcake thickness curve of the present invention.
Figure 13 is PAM content-sea-water mud pH value curve of the present invention.
Figure 14 is PAM content-sea-water mud colloidity curve of the present invention.
Figure 15 is soda ash content-sea-water mud viscograph of the present invention.
Figure 16 is soda ash content-sea-water mud fluid loss curve of the present invention.
Figure 17 is soda ash content-sea-water mud mud skin depth curve of the present invention.
Figure 18 is soda ash content-sea-water mud pH value curve of the present invention.
Figure 19 is soda ash content-sea-water mud colloidity curve of the present invention.
Embodiment
Applicant carries out at the Lang Qi of Fujian Province Min River Bridge bridge site place, in the process of ultra-long pile basis drilling construction, having proposed the mixing proportion design method of the sea-water mud of a kind of thinkling sound's of being applicable to qi Min River Bridge operating mode, retaining wall stable performance, and its design cycle as shown in Figure 1.Detailed process is as follows:
The starting material of step 1, selection sea-water mud
A. the selection of seawater: utilize the natural sea-water at thinkling sound's qi Min River Bridge bridge site place to test, get flood tide phase natural sea-water and ebb tide phase natural sea-water is used for preparing sea-water mud.The physical and chemical index of the natural sea-water at thinkling sound's qi Min River Bridge bridge site place is in Table 1.
The natural sea-water physical and chemical index at table 1 thinkling sound qi Min River Bridge bridge site place
B. the selection of clay for preparing mud: test in place research is selected with the high Shandong sodium bentonite of smectite content; Its colloidity is not less than 95%, and sand factor is not more than 0.3%.
C. the selection of tackifier: test in place research selects polyacrylamide (PAM) as tackifier.
D. the selection of dispersion agent: soda ash (Na is selected in test in place research
2cO
3) as dispersion agent.
Step 2, the proportioning of sea-water mud is carried out to orthogonal experimental design
At seawater, sodium bentonite, PAM and Na
2cO
3mass ratio be 1000: (110～190): (0.005～0.025): under the working condition of (2～4), set operating mode 1 and be: flood tide seawater+sodium bentonite+PAM+Na
2cO
3; Limiting operating mode 2 is: ebb tide seawater+sodium bentonite+PAM+Na
2cO
3.Wherein, test seawater consumption all calculates by 1000g, and the density of ebb tide seawater is by 1.000
g/ cm
3calculate.
Choose sodium bentonite, PAM and Na
2cO
3as variable factor, sodium bentonite is chosen 110g, 130g, 150g, 170g and five number of levelss of 190g, and PAM chooses 0.005g, 0.01g, 0.015g, 0.02g and five number of levelss of 0.025g, Na
2cO
3choose 2g, 2.5g, 3g, 3.5g and five number of levelss of 4g, designing three factor five levels is L
25(5
3) orthogonal test scheme, the engineering adaptability of sea-water mud is launched to research.Orthogonal test level of factor under two kinds of working conditions is in Table 2.Three factor five horizontal quadrature testing programs of flood tide sea-water mud and test-results are in Table 3.Three factor five horizontal quadrature testing programs of ebb tide sea-water mud and test-results are in Table 4.
Table 2 orthogonal test level of factor table
Three factor five horizontal quadrature testing program and test-results of table 3 flood tide sea-water mud
Three factor five horizontal quadrature testing program and test-results of table 4 flood tide sea-water mud
Step 3,25 groups of sea-water muds of preparation, its preparation technology's schema as shown in Figure 2.
Described in 25 groups, sea-water mud all prepares by step 301～304:
Step 301, take seawater, clay for preparing mud, tackifier and dispersion agent respectively;
Step 302, by part heating of seawater to 65 ℃～80 ℃, then the tackifier after taking in step 301 are dispersed in the part seawater after heating, obtain mixing solutions; The quality of described part seawater is 30% of seawater total mass after taking in step 301;
Step 303, by the clay for preparing mud crushed after being dried after taking in step 301, then that the dispersion agent mix after taking in the clay for preparing mud after pulverizing and step 301 is even, obtain native alkali mixture; Described dry temperature is 65 ℃～80 ℃, and the described dry time is 20min;
Step 304, native alkali mixture described in mixing solutions described in step 302, step 303 and residual seawater (be seawater total mass 70%) are mixed to rear standing 24h～30h, then under the condition that is 30r/min～40r/min in stir speed (S.S.), stir 40min, obtain sea-water mud.
The properties of step 4, test sea-water mud
According to < < highway bridge and culvert construction technique normalizing > > (JTGTF50-2011) and engineering practice of construction situation, the leading indicator of setting sea-water mud is: sea-water mud proportion is 1.06～1.10, sea-water mud viscosity is 18～28s, sea-water mud gel strength is 1～2.5Pa, sea-water mud sand factor≤4%, sea-water mud potential of hydrogen (pH) is 8～10, sea-water mud colloidity >=95%, sea-water mud percentage of water loss≤20ml/30min, sea-water mud mudcake thickness≤3mm.Wherein, the retaining wall performance of sea-water mud is passed through: proportion, viscosity, potential of hydrogen, percentage of water loss and mudcake thickness five indices are evaluated.
According to the requirement of highway bridge and culvert construction technique normalizing, 25 groups of sea-water muds are all carried out to proportion, viscosity, potential of hydrogen, percentage of water loss and mudcake thickness test, to evaluate the retaining wall performance of respectively organizing sea-water mud.
Step 5, the test-results of sea-water mud is analyzed
According to the testing data of sea-water mud and then draw out Fig. 3 to 19, wherein Fig. 3 is sodium bentonite content-sea-water mud specific gravity curve; Fig. 4 is sodium bentonite content-sea-water mud viscograph; Fig. 5 is sodium bentonite content-sea-water mud fluid loss curve; Fig. 6 is sodium bentonite content-sea-water mud mudcake thickness curve; Fig. 7 is sodium bentonite content-sea-water mud pH value curve; Fig. 8 is sodium bentonite content-sea-water mud colloidity curve; Fig. 9 is sodium bentonite content-sea-water mud sand factor curve; Figure 10 is PAM content-sea-water mud viscograph; Figure 11 is PAM content-sea-water mud fluid loss curve; Figure 12 is PAM content-sea-water mud mudcake thickness curve; Figure 13 is PAM content-sea-water mud pH value curve; Figure 14 is PAM content-sea-water mud colloidity curve; Figure 15 is soda ash content-sea-water mud viscograph; Figure 16 is soda ash content-sea-water mud fluid loss curve; Figure 17 is soda ash content-sea-water mud mud skin depth curve; Figure 18 is soda ash content-sea-water mud pH value curve; Figure 19 is soda ash content-sea-water mud colloidity curve.From Fig. 3 to 19, can analyze and draw:
1) impact of sodium bentonite content on mud index
1. along with the increase of sodium bentonite content, mudcake thickness, colloidity, proportion, sand factor and viscosity all significantly increase, and the fluid loss of mud reduces to some extent, and pH changes not obvious.
When 2. ebb tide sea-water mud is identical with flood tide sea-water mud proportioning, ebb tide sea-water mud is compared with flood tide sea-water mud, and its proportion is little, viscosity is large, mudcake thickness is large, colloidity is large, sand factor is high.
2) tackifier levels changes the impact on mud index
1. along with the increase of PAM content, the viscosity of mud, colloidity, mudcake thickness significantly increase, and pH value remains unchanged substantially, and fluid loss reduces rapidly.PAM content on the proportion of mud, sand factor, gel strength etc. substantially without impact.
2. when mud proportioning is identical, the colloidity of ebb tide sea-water mud is far above the colloidity of flood tide sea-water mud, this is because mud is higher to the susceptibility of salt, and in flood tide seawater inorganic salt content much larger than ebb tide seawater, be subject to the sodium bentonite particle that affects of seawater salinity occur coalescent and sink, cause the colloidity of flood tide sea-water mud to decline.
3) impact of soda ash content on mud index
Along with the increase of soda ash content, the colloidity of flood tide sea-water mud increases, and the colloidity of ebb tide sea-water mud changes not quite, shows that the content of soda ash is little on the colloidity impact of ebb tide sea-water mud, and larger on the colloidity impact of flood tide sea-water mud.Soda ash content increases, and the pH value of flood tide sea-water mud and ebb tide sea-water mud, viscosity all increase to some extent, and fluid loss reduces to some extent, and mudcake thickness is without considerable change.
Step 6, determine the optimum mix of sea-water mud
By analyzing the Changing Pattern of each starting material consumption, determine that the retaining wall performance of ebb tide sea-water mud is generally better than the retaining wall performance of flood tide sea-water mud.Therefore, the application's final choice ebb tide seawater is prepared the sea-water mud of retaining wall stable performance, and its optimum mix is in Table 5.
The optimum mix of the sea-water mud of table 5 retaining wall stable performance
According to above-mentioned ebb tide sea-water mud for step, adopt the optimum mix in test, the property indices of ebb tide sea-water mud is in Table 6, various performance requriementss to mud in the time of can meeting boring, thereby can effectively prevent the infiltration of caving in underground water of hole wall, suspension boring mud also carries boring mud ability and also can be guaranteed.Therefore, Construction of Bored Piles over Sea adopts ebb tide sea-water mud, can greatly reduce construction cost, when drilling construction, can not cause because of impacts such as weather, sea situation, ship machines the interruption of drilling construction, reduced accident rate in drilling construction mesopore, quality is guaranteed, and construction link is few, illustrates that thus ebb tide sea-water mud has good engineering adaptability.
The properties of table 6 sea-water mud under optimum mix condition
The prime cost of water mud is the expense of seawater during the transport charge of fresh water is holed with displacement, through test section engineering, adjusts, and a pile drilling process on average needs 350m
3fresh water, fresh water is by 25 yuan/m
3meter, the expense of displacement seawater is about 0.875 ten thousand yuan through adjusting, and other materials is as approximately 0.12 ten thousand yuan of sodium bentonite and soda ash, approximately 0.995 ten thousand yuan of the slurried material cost of a pile.Adopt seawater configuration mud, prime cost is tackifier PAM, and PAM is by 20,000 yuan/ton.Every pile needs the about 6kg of PAM, and its Master Cost is 0.012 ten thousand yuan, and other materials is as approximately 0.14 ten thousand yuan of sodium bentonite and soda ash, approximately 0.152 ten thousand yuan of the material cost of a pile.Therefore, if a pile is used ebb tide sea-water mud can save approximately 0.843 ten thousand yuan.As can be seen here, adopt seawater pulping to be not only conducive to gather materials on the spot, also greatly reduce the cost of engineering, achievement in research has significant economic benefit.
In sum, the present invention effectively overcome water mud mixing proportion design method time-consuming, require great effort, invest the shortcoming such as large and original sea-water mud mixing proportion design method seawater ionic concn changes the shortcomings such as the mud stability causing is poor, colloidity is low, retaining wall poor performance and has significant economic benefit, social benefit, environmental benefit and technical benefits, and there is high industrial utilization.
The above, be only preferred embodiment of the present invention, not the present invention imposed any restrictions.Every any simple modification of above embodiment being done according to invention technical spirit, change and equivalence change, and all still belong in the protection domain of technical solution of the present invention.
Claims (3)
1. a mixing proportion design method for the sea-water mud of retaining wall stable performance, is characterized in that, the method comprises the following steps:
Step 1, selection starting material:
A. seawater: select ebb tide phase natural sea-water;
B. clay for preparing mud: selecting sodium bentonite is clay for preparing mud;
C. tackifier: selecting polyacrylamide is tackifier;
D. dispersion agent: selecting soda ash is dispersion agent;
Step 2, the proportioning of sea-water mud is carried out to orthogonal experimental design:
Mass ratio at seawater, clay for preparing mud, tackifier and dispersion agent is 1000: (110～190): (0.005～0.025): under the working condition of (2～4), selecting clay for preparing mud, tackifier and dispersion agent is variable factor, each variable factor is all chosen five number of levelss, designs thus three factor five horizontal quadrature testing programs;
Step 3, according to the design requirements of three factor five horizontal quadrature testing programs described in step 2, prepare 25 groups of sea-water muds, described in 25 groups, sea-water mud all prepares by step 301～304:
Step 301, take seawater, clay for preparing mud, tackifier and dispersion agent respectively;
Step 302, by part heating of seawater to 65 ℃～80 ℃, then the tackifier after taking in step 301 are dispersed in the part seawater after heating, obtain mixing solutions; The quality of described part seawater is 30% of seawater total mass after taking in step 301;
Step 303, by the clay for preparing mud crushed after being dried after taking in step 301, then that the dispersion agent mix after taking in the clay for preparing mud after pulverizing and step 301 is even, obtain native alkali mixture;
Step 304, native alkali mixture described in mixing solutions described in step 302, step 303 is mixed to rear standing 24h～30h with residual seawater, under the condition that is then 30r/min～40r/min in stir speed (S.S.), stir 40min, obtain sea-water mud;
Step 4, according to the requirement of highway bridge and culvert construction technique normalizing, proportion, viscosity, potential of hydrogen, percentage of water loss and the mudcake thickness of sea-water mud described in 25 groups are all tested, to evaluate the retaining wall performance of respectively organizing sea-water mud;
Step 5, the resulting test result of step 4 is analyzed, obtain clay for preparing mud, tackifier and dispersion agent for the impact of the retaining wall performance of sea-water mud, determine optimum level of factor combination, thereby obtain the optimum mix of the sea-water mud of retaining wall stable performance.
2. the mixing proportion design method of the sea-water mud of a kind of retaining wall stable performance according to claim 1, is characterized in that, the colloidity of sodium bentonite described in step 1 is not less than 95%, and sand factor is not more than 0.3%.
3. the mixing proportion design method of the sea-water mud of a kind of retaining wall stable performance according to claim 1, is characterized in that, dry temperature described in step 303 is 65 ℃～80 ℃, and the described dry time is 20min.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104480927A (en) * | 2014-10-29 | 2015-04-01 | 上海市政建设有限公司 | Construction method of soil improvement |
| CN105154043A (en) * | 2015-09-07 | 2015-12-16 | 中铁七局集团郑州工程有限公司 | Bore forming and wall protecting slurry for deep saturated sandy soil stratum bridge bored pile |
| CN105294005A (en) * | 2014-11-18 | 2016-02-03 | 蒋新明 | Mix proportion design method for improving bending tensile strength of road-used cement concrete |
| CN105714768A (en) * | 2016-03-09 | 2016-06-29 | 中国水利水电第十一工程局有限公司 | Application method of wall protecting fluid to pile foundation construction |
| CN106367045A (en) * | 2016-08-23 | 2017-02-01 | 北京市勘察设计研究院有限公司 | Anti-collapse and drag-reducing polymer drilling fluid and application thereof |
| CN109867494A (en) * | 2019-04-19 | 2019-06-11 | 重庆建工第二建设有限公司 | A kind of machinery rotary digging pile wall slurrying method |
| CN110922949A (en) * | 2019-10-28 | 2020-03-27 | 北京中煤矿山工程有限公司 | Low specific gravity and high performance retaining wall slurry material for long horizontal freezing drilling in muddy clay and preparation method thereof |
| CN112250388A (en) * | 2020-10-28 | 2021-01-22 | 中国水电基础局有限公司 | High-halogen seawater wall-protecting slurry for impervious wall and preparation method thereof |
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| CN101318799A (en) * | 2008-07-01 | 2008-12-10 | 中国海洋石油总公司 | High-strength low-freedom water low-density oil well cement paste |
| CN101486549A (en) * | 2009-02-18 | 2009-07-22 | 路桥集团国际建设股份有限公司 | Slurry for cross-sea bridge drilling pile drill construction and pulp making method |
| CN103539389A (en) * | 2012-07-16 | 2014-01-29 | 浙江海洋学院 | Preparation method of seawater mixing cemented soil |
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| CN101318799A (en) * | 2008-07-01 | 2008-12-10 | 中国海洋石油总公司 | High-strength low-freedom water low-density oil well cement paste |
| CN101486549A (en) * | 2009-02-18 | 2009-07-22 | 路桥集团国际建设股份有限公司 | Slurry for cross-sea bridge drilling pile drill construction and pulp making method |
| CN103539389A (en) * | 2012-07-16 | 2014-01-29 | 浙江海洋学院 | Preparation method of seawater mixing cemented soil |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104480927A (en) * | 2014-10-29 | 2015-04-01 | 上海市政建设有限公司 | Construction method of soil improvement |
| CN105294005A (en) * | 2014-11-18 | 2016-02-03 | 蒋新明 | Mix proportion design method for improving bending tensile strength of road-used cement concrete |
| CN105154043A (en) * | 2015-09-07 | 2015-12-16 | 中铁七局集团郑州工程有限公司 | Bore forming and wall protecting slurry for deep saturated sandy soil stratum bridge bored pile |
| CN105714768A (en) * | 2016-03-09 | 2016-06-29 | 中国水利水电第十一工程局有限公司 | Application method of wall protecting fluid to pile foundation construction |
| CN106367045A (en) * | 2016-08-23 | 2017-02-01 | 北京市勘察设计研究院有限公司 | Anti-collapse and drag-reducing polymer drilling fluid and application thereof |
| CN109867494A (en) * | 2019-04-19 | 2019-06-11 | 重庆建工第二建设有限公司 | A kind of machinery rotary digging pile wall slurrying method |
| CN110922949A (en) * | 2019-10-28 | 2020-03-27 | 北京中煤矿山工程有限公司 | Low specific gravity and high performance retaining wall slurry material for long horizontal freezing drilling in muddy clay and preparation method thereof |
| CN112250388A (en) * | 2020-10-28 | 2021-01-22 | 中国水电基础局有限公司 | High-halogen seawater wall-protecting slurry for impervious wall and preparation method thereof |
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