CN108360495A - Construction method of soft foundation - Google Patents
Construction method of soft foundation Download PDFInfo
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- CN108360495A CN108360495A CN201810426603.6A CN201810426603A CN108360495A CN 108360495 A CN108360495 A CN 108360495A CN 201810426603 A CN201810426603 A CN 201810426603A CN 108360495 A CN108360495 A CN 108360495A
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- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/008—Sludge treatment by fixation or solidification
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- 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
- E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
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- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Agronomy & Crop Science (AREA)
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- General Engineering & Computer Science (AREA)
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- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
The present invention provides a kind of construction method of soft foundation, include the following steps：(1) sludge curing agent and mud are mixed in proportion；(2) shelving 26 hours；(3) compaction moulding；(4) it conserves 2 20 days；The sludge curing agent is discarded ash, flyash, ardealite, weight alkali, porous additive and ammonium hydroxide by desulphurization denitration and is mixed.Construction method of soft foundation of the present invention, energy conservation and environmental protection while reducing cost, water-tolerant, intensity are high, can solve the problems, such as that sludge solidification speed is slow in the prior art, cement consumption is big, mud after solidification has good resistance to compression effect, while the impermeabilisation of the mud after solidification works well；Good impermeabilisation ability means that the flushing resistance of the mud after solidification is more preferable, has higher marketing practical value.
Description
Technical field
The present invention relates to field of engineering technology more particularly to a kind of construction method of soft foundation.
Background technology
China's weakness viscous soil horizon is distributed widely in the topographies such as marine facies, lacustrine facies and river facies and compares low lying areas.Currently, state
It is interior to some representative areas as the coastal weak soil on Tianjin, Lianyun Harbour, Ningbo, Guangzhou ground has carried out extensively and profoundly
Research.Weak soil from cities such as Tianjin-Tangshan-Shanghai-Ningbo-Hangzhou-Wenzhou-Foochow-Xiamen-Guangzhou-Shenzhen
Moisture content gradually increases from north to southern, and compressibility increases therewith, and intensity continuously decreases.A large amount of weak soil is encountered in engineering construction
The southeastern coastal areas in foundation treatment, especially China, natural moisture content is big, and void ratio is big, and the compressed coefficient is high, pressure resistance
It spends low, and there is creep properties, the special engineering properties such as thixotropy, due to this ground region earth's surface moist or ponding throughout the year.Chang You
Aqueous plant growth is liked, and causes to contain more humus and organic matter in weak soil, engineering geological condition is poor.Engineering characteristic
It is more complicated, to bringing a series of problem in processing soft soil technique.
Soft soil foundation tradition is to use cement mortar mixing pile and rotary churning pile.The method is the object based on soil-cement
Physicochemical react, cement carried out under the action of with certain active medium some row physical-chemical reactions, cement hydrolysis and
Aquation generates gelinite and various hydrates, keeps the soil body pellet, hardens, and fills the gap between the soil body, so that weak soil is reached makes
Use intensity.But its reaction speed is slow, and it is big to cement consumption, it is of high cost.
Currently, soil curing agent is broadly divided into organic compounds category, inorganic chemical species, biological enzyme, compound solidification
Agent etc..The main function of curing agent is that hydration reaction, the hyrate of generation occurs with the Free water in mud after mixing mud
It is gradually transformed into stable crystalline solid by gelatinized, is filled in the hole of mud soil particle, forms firm skeleton, enhances
The intensity of mud.Since mud has high-moisture feature, it is difficult to meet optimum moisture content requirement when as road filler, for
The selection of this feature, curing agent should especially pay attention to its water absorbing properties, and improving the best of mud using the water imbibition of curing agent contains
Water, while being conducive to improve mud intensity.But major part curing technology not only forms complexity at present, and cost of material is high, from
And the various promoter additives for increasing the application cost of solidified earth, while using are harmful to environment, easily cause soil and ring
Border is polluted, unfriendly to environment.
Invention content
To achieve the above object, technical scheme is as follows：
A kind of construction method of soft foundation, includes the following steps：(1) sludge curing agent is mixed in proportion with mud
It is even；(2) shelving 2-6 hours；(3) compaction moulding；(4) it conserves 2-20 days.
Preferably, the mass ratio of sludge curing agent and the mud is 1 in the step (1)：(6-20).Further preferably
It is 1：(7-13).
Mud moisture content is 40-80wt% in the step (1).
The step (4) is to be conserved in curing box, 15-30 DEG C of curing temperature, and relative humidity 70-95% is supported
Shield 2-20 days.
The sludge curing agent is discarded ash, flyash, ardealite, weight alkali, porous additive and ammonium hydroxide by desulphurization denitration and is mixed
It closes.
Preferably, the desulphurization denitration discards the mass ratio of ash, flyash, ardealite, weight alkali, porous additive, ammonium hydroxide
It is 1:(0.5-1.5):(0.3-0.8):(0.1-0.4):(0.1-0.3):(0.3-0.6).The mass fraction of the ammonium hydroxide is 25-
28%.
Preferably, the preparation method of the sludge curing agent, comprises the steps of：
S1 pretreatments of raw material：Desulphurization denitration is discarded into ash, flyash, ardealite, weight alkali and is added separately to crusher progress
It is broken, it is then respectively adding tube mill grinding；
Desulphurization denitration after grinding is discarded ash, flyash, ardealite, weight alkali and is added in blender and is stirred by S2
It is even, porous additive, ammonium hydroxide is added, is uniformly mixed under sealing, dries to get the sludge curing agent.
Preferably, the vigorous formula specific surface area in the step S1 after each raw material grinding is all higher than 400m2/Kg。
Preferably, the discarded ash in the step S2 after grinding, flyash, ardealite, weight alkali mass ratio be 1:(0.5
~1.5):(0.3~0.8):(0.1~0.4).
Desulphurization denitration discards ash, flyash, ardealite etc. and is commonly used for soil-solidified-agent；In reinforcement of soft soil, in weak soil
Hydrolysis and hydration reaction occur for the mineral that water can discard rapidly the surfaces such as ash, flyash, ardealite with desulphurization denitration, generate Ca
(OH)2, CaCO3And the mixtures such as cement bacillus, product are in the colloid of discrete form mostly, it can be a large amount of free in the soil body
Water becomes the crystallization water, and is fixed up in the form of the crystallization water.In hydration reaction process, after hydrated product generates, some is certainly
Body continues to harden, and with the continuous progress of hydration reaction, crystallization hyrate not soluble in water can be slowly generated in the soil body, this
Kind crystallization hyrate can greatly increase the intensity of solidified earth.
Preferably, the heavy alkali is sodium carbonate and/or sodium bicarbonate.
Preferably, the heavy alkali is sodium carbonate and sodium bicarbonate in mass ratio 1:The mixture of (0.3~0.5).
Preferably, the ammonia volume is 0.3~0.6 times of the discarded grey weight of desulphurization denitration in step S2.
Preferably, the mass fraction of the ammonium hydroxide is 25~28%.
Preferably, the porous additive amount is 0.1~0.3 times of the discarded grey weight of desulphurization denitration in step S2.
Preferably, the porous additive be porous silica material, porous resin material, one kind in porous carbon materials or
A variety of mixing.
It is further preferred that the porous additive is porous resin material, porous carbon materials in mass ratio 1：(1~3)
It mixes.
As one of which preferred embodiment, the porous additive be porous resin material, porous carbon materials in mass ratio
1:2.5 mixing.
Preferably, the preparation method of the porous silica material is as follows：
By 3~6g polyethylene oxide-polypropylene oxide-polyethylene oxide be added to 100~150mL mass fractions be 5~
In 10% hydrochloric acid, at 30~50 DEG C under the rotating speed of 100~500r/min stir to become clarify, then 30~50 DEG C, 100
9~10mL ethyl orthosilicates are added with the rate of addition of 0.05~0.1g/s under the stirring of the rotating speed of~500r/min, are continued
30~50 DEG C, persistently stir 20~30h under the rotating speed of 100~500r/min, then reaction solution is fitted into autoclave pressure, and will pressure
Power kettle is put into 20~30h of solidification in 100~120 DEG C of baking ovens.By centrifuging, washing, dry 10~15h is obtained at 70~85 DEG C
Solid powder sample；Solid powder sample is put into Muffle furnace, 500 are risen to from 10~35 DEG C with 1~3 DEG C/min heating rates
~600 DEG C and 4.5~6.0h of calcining at 500~600 DEG C, finally obtain the porous silica material of white.
Preferably, the preparation method of the porous resin material is as follows：
Epoxy resin porous material is obtained with reference to the preparation method of embodiment 1 in Chinese invention patent CN102408580B；
Epoxy resin porous material is immersed in acetone soln, is vacuumized in vacuum degasing machine 2~3 times, 2~3h is stood, is filtered,
10~15h is dried in vacuo at 30~40 DEG C；Then the preswollen epoxy resin porous material after drying is immersed in propylene
It in the aqueous solution of acid monomers, is vacuumized in vacuum degasing machine 2~3 times, stands 1~3h；In nitrogen atmosphere, 50~65 DEG C of water
It bathes, stir 20~30h under the rotating speed of 100~300r/min, reaction product is impregnated 10 by filtering in 55~70 DEG C of deionized waters
~15h, 10~15h of ultrasound at 30~50 DEG C, filtering are dried to constant weight under 70~85 DEG C of normal vacuums, obtain institute
State porous resin material.
Preferably, the preparation method of the porous carbon materials is as follows：
By 0.18~0.23g m-aminophenols, 0.18~0.23mL mass fractions be 25~28% ammonia solvent 25
~30mL mass fractions be 12~38% ethanol water in, at 10~35 DEG C, 100~300r/min stir 20~
40min；It is subsequently added into 0.18~0.23g cetyl trimethylammonium bromides, continues in 10~35 DEG C, 100~300r/min
20~40min of lower stirring；0.25~0.30mL formaldehyde is added, is stirred 1~5 minute at 10~35 DEG C, 100~300r/min；
0.7~1.2mL ethyl orthosilicates are then added dropwise with the speed of 0.05~0.1g/s, are stirred at 10~35 DEG C, 100~300r/min
Mix 20~30h；The reaction solution of gained is poured into autoclave pressure, cures 20~30h in 70~85 DEG C of baking oven.By from
After the heart, washing, it is dried in vacuo 10~15h at 70~85 DEG C, obtains solid powdery sample；Be placed in tube furnace,
550~650 DEG C are risen to from 10~35 DEG C and 2.5 are kept at 550~650 DEG C under nitrogen atmosphere with the heating rate of 1~5 DEG C/min
~4.0h, hydrofluoric acid aqueous solution 20~30h of immersion treatment of 8~12wt% of obtained powder, using being filtered, washed, do
Dry processing, obtains porous carbon materials.
Beneficial effects of the present invention：
Construction method of soft foundation of the present invention, energy conservation and environmental protection while reducing cost, water-tolerant, intensity are high, can solve
The problem that certainly sludge solidification speed is slow, cement consumption is big in the prior art, the mud after solidification have good resistance to compression effect, together
When solidification after the impermeabilisation of mud work well；Good impermeabilisation ability means the flushing resistance of the mud after solidification
More preferably, there is higher marketing practical value.
Construction method of soft foundation of the present invention, primary raw material used is from industrial waste gas lime-ash etc., to the profit of waste
With being greatly saved resource, while the exhaust gas lime-ash of also reduction improper places the environmental problem brought.
Specific implementation mode
Embodiment 1
A kind of preparation method of sludge curing agent, comprises the steps of：
Desulphurization denitration is discarded ash, flyash, ardealite, weight alkali and is added separately to TPB-60 crushers (Jining mountain silver by S1
Coal mine machinery Co., Ltd) at 970r/min be crushed 3h, being then respectively adding tube mill, (Henan mountain mining machinery has
Limit company, model：Ф 1500 × 3000) grinding to each raw material specific surface area be 450m2/Kg；
Desulphurization denitration after grinding is discarded ash, flyash, ardealite, weight alkali and is added in blender with 100r/min by S2
Rotating speed be stirred 1h, at 105 DEG C dry 30min to get the sludge curing agent.Desulphurization denitration after the grinding is discarded
Ash, flyash, ardealite, weight alkali mass ratio be 1:1:0.5:0.3.
The heavy alkali is sodium carbonate and sodium bicarbonate in mass ratio 1:0.4.
Embodiment 2
A kind of preparation method of sludge curing agent, comprises the steps of：
Desulphurization denitration is discarded ash, flyash, ardealite, weight alkali and is added separately to TPB-60 crushers (Jining mountain silver by S1
Coal mine machinery Co., Ltd) at 970r/min be crushed 3h, being then respectively adding tube mill, (Henan mountain mining machinery has
Limit company, model：Ф 1500 × 3000) grinding to each raw material specific surface area be 450m2/Kg；
Desulphurization denitration after grinding is discarded ash, flyash, ardealite, weight alkali and is added in blender with 100r/min by S2
Rotating speed be stirred 1h, at 105 DEG C dry 30min to get the sludge curing agent.Desulphurization denitration after the grinding is discarded
Ash, flyash, ardealite, weight alkali mass ratio be 1:0.5:1:0.2.
The heavy alkali is sodium carbonate and sodium bicarbonate in mass ratio 1:0.4.
Embodiment 3
A kind of preparation method of sludge curing agent, comprises the steps of：
Desulphurization denitration is discarded ash, flyash, ardealite, weight alkali and is added separately to TPB-60 crushers (Jining mountain silver by S1
Coal mine machinery Co., Ltd) at 970r/min be crushed 3h, being then respectively adding tube mill, (Henan mountain mining machinery has
Limit company, model：Ф 1500 × 3000) grinding to each raw material specific surface area be 450m2/Kg；
Desulphurization denitration after grinding is discarded ash, flyash, ardealite, weight alkali and is added in blender with 100r/min by S2
Rotating speed be stirred 1h, at 105 DEG C dry 30min to get the sludge curing agent.Desulphurization denitration after the grinding is discarded
Ash, flyash, ardealite, weight alkali mass ratio be 1:0.7:0.7:0.25.
The heavy alkali is sodium carbonate and sodium bicarbonate in mass ratio 1:0.4.
Embodiment 4
A kind of preparation method of sludge curing agent, comprises the steps of：
Desulphurization denitration is discarded ash, flyash, ardealite, weight alkali and is added separately to TPB-60 crushers (Jining mountain silver by S1
Coal mine machinery Co., Ltd) at 970r/min be crushed 3h, being then respectively adding tube mill, (Henan mountain mining machinery has
Limit company, model：Ф 1500 × 3000) grinding to each raw material specific surface area be 450m2/Kg；
Desulphurization denitration after grinding is discarded ash, flyash, ardealite, weight alkali and is added in blender with 100r/min by S2
Rotating speed be stirred 1h, porous additive, ammonium hydroxide is added, 1h is stirred with the rotating speed of 100r/min under sealing, 105
30min is dried at DEG C to get the sludge curing agent.Desulphurization denitration after the grinding discards ash, flyash, ardealite, weight alkali
Mass ratio be 1:0.7:0.7:0.25.
The heavy alkali is sodium carbonate and sodium bicarbonate in mass ratio 1:0.4.
The ammonia volume is 0.5 times that grey weight is discarded in step S2.
The mass fraction of the ammonium hydroxide is 25%.
The porous additive amount is 0.2 times that grey weight is discarded in step S2.
The porous additive is porous silica material.
The preparation method of the porous silica material is：5g polyethylene oxide-polypropylene oxide-polyethylene oxide is added to
150mL mass fractions be 10% hydrochloric acid in, at 50 DEG C under the rotating speed of 300r/min stir to become clarify, then 50 DEG C,
10mL ethyl orthosilicates are added with the rate of addition of 0.05g/s under the stirring of the rotating speed of 300r/min, are continued in 50 DEG C, 300r/
It persistently stirs for 24 hours under the rotating speed of min, then reaction solution is fitted into autoclave pressure, and autoclave pressure is put into 105 DEG C of baking ovens and is cured
24h.By centrifugation, deionized water washing, dry 12h obtains solid powder sample at 80 DEG C；Solid powder sample is put into
In Muffle furnace, 550 DEG C are risen to from 25 DEG C with 3 DEG C/min heating rates and calcine 5h at 550 DEG C, finally obtain the porous of white
Silicon materials.
Embodiment 5
A kind of preparation method of sludge curing agent, comprises the steps of：
Desulphurization denitration is discarded ash, flyash, ardealite, weight alkali and is added separately to TPB-60 crushers (Jining mountain silver by S1
Coal mine machinery Co., Ltd) at 970r/min be crushed 3h, being then respectively adding tube mill, (Henan mountain mining machinery has
Limit company, model：Ф 1500 × 3000) grinding to each raw material specific surface area be 450m2/Kg；
Desulphurization denitration after grinding is discarded ash, flyash, ardealite, weight alkali and is added in blender with 100r/min by S2
Rotating speed be stirred 1h, porous additive, ammonium hydroxide is added, 1h is stirred with the rotating speed of 100r/min under sealing, 105
30min is dried at DEG C to get the sludge curing agent.Desulphurization denitration after the grinding discards ash, flyash, ardealite, weight alkali
Mass ratio be 1:0.7:0.7:0.25.
The heavy alkali is sodium carbonate and sodium bicarbonate in mass ratio 1:0.4.
The ammonia volume is 0.5 times that grey weight is discarded in step S2.
The mass fraction of the ammonium hydroxide is 25%.
The porous additive amount is 0.2 times that grey weight is discarded in step S2.
The porous additive is porous resin material.
The preparation method of the porous resin material is：With reference to embodiment 1 in Chinese invention patent CN102408580B
Preparation method obtains epoxy resin porous material；Epoxy resin porous material is impregnated in acetone, in vacuum degasing machine (model
KK-VT300, Ha Sai Science and Technology Ltd.s of Shenzhen) in vacuumize 3 times and (make solution through gap well into more to epoxy resin
In Porous materials matrix), 3h is stood, the filtering of 500 mesh grenadines is dried in vacuo 12h at 40 DEG C；It then will be preswollen after drying
Epoxy resin porous material is immersed in the aqueous solution of acrylic monomers, and in vacuum degasing machine, (model KK-VT300, Shenzhen are breathed out
Match Science and Technology Ltd.) in vacuumize 3 times (make solution through gap well into in epoxy resin porous material matrix), stand
3h；It is stirred for 24 hours under 60 DEG C of water-baths, the rotating speed of 300r/min, nitrogen atmosphere, 500 mesh grenadines filtering, by reaction product at 60 DEG C
12h is impregnated in deionized water, the ultrasound 12h at 40 DEG C, 500 mesh grenadines filtering is dried under 80 DEG C of normal vacuums to perseverance
Weight, obtains the porous resin material.
Embodiment 6
A kind of preparation method of sludge curing agent, comprises the steps of：
Desulphurization denitration is discarded ash, flyash, ardealite, weight alkali and is added separately to TPB-60 crushers (Jining mountain silver by S1
Coal mine machinery Co., Ltd) at 970r/min be crushed 3h, being then respectively adding tube mill, (Henan mountain mining machinery has
Limit company, model：Ф 1500 × 3000) grinding to each raw material specific surface area be 450m2/Kg；
Desulphurization denitration after grinding is discarded ash, flyash, ardealite, weight alkali and is added in blender with 100r/min by S2
Rotating speed be stirred 1h, porous additive, ammonium hydroxide is added, 1h is stirred with the rotating speed of 100r/min under sealing, 105
30min is dried at DEG C to get the sludge curing agent.Desulphurization denitration after the grinding discards ash, flyash, ardealite, weight alkali
Mass ratio be 1:0.7:0.7:0.25.
The heavy alkali is sodium carbonate and sodium bicarbonate in mass ratio 1:0.4.
The ammonia volume is 0.5 times that grey weight is discarded in step S2.
The mass fraction of the ammonium hydroxide is 25%.
The porous additive amount is 0.2 times that grey weight is discarded in step S2.
The porous additive is porous carbon materials.
The preparation method of the porous carbon materials is：By 0.2g m-aminophenols, the ammonium hydroxide that 0.2mL mass fractions are 25%
It is dissolved in the ethanol water that 28mL mass fractions are 30wt%, 30min is stirred at 25 DEG C, 200r/min；It is subsequently added into
0.2g cetyl trimethylammonium bromides, continuation stir 30min at 25 DEG C, 200r/min；Be added 0.3mL formaldehyde, 25 DEG C,
It is stirred 3 minutes under 200r/min；1.0mL ethyl orthosilicates are then added dropwise with the speed of 0.05g/s, at 25 DEG C, 200r/min
Stirring is for 24 hours；The reaction solution of gained is poured into autoclave pressure, is cured for 24 hours in 80 DEG C of baking oven.By centrifugation, deionized water
After washing, conventional vacuum dries 12h at 80 DEG C, obtains solid powdery sample；Powder is placed in tube furnace later, in nitrogen
Atmosphere rises to 600 DEG C from 25 DEG C with the heating rate of 3 DEG C/min under enclosing and keeps 3h at 600 DEG C, and obtained powder is with 8wt%'s
Hydrofluoric acid aqueous solution immersion treatment for 24 hours, for 24 hours using suction filtration, deionized water washing, 80 DEG C of conventional vacuums dryings, obtains porous
Carbon material.
Embodiment 7
A kind of preparation method of sludge curing agent, comprises the steps of：
Desulphurization denitration is discarded ash, flyash, ardealite, weight alkali and is added separately to TPB-60 crushers (Jining mountain silver by S1
Coal mine machinery Co., Ltd) at 970r/min be crushed 3h, being then respectively adding tube mill, (Henan mountain mining machinery has
Limit company, model：Ф 1500 × 3000) grinding to each raw material specific surface area be 450m2/Kg；
Desulphurization denitration after grinding is discarded ash, flyash, ardealite, weight alkali and is added in blender with 100r/min by S2
Rotating speed be stirred 1h, porous additive, ammonium hydroxide is added, 1h is stirred with the rotating speed of 100r/min under sealing, 105
30min is dried at DEG C to get the sludge curing agent.Desulphurization denitration after the grinding discards ash, flyash, ardealite, weight alkali
Mass ratio be 1:0.7:0.7:0.25.
The heavy alkali is sodium carbonate and sodium bicarbonate in mass ratio 1:0.4.
The ammonia volume is 0.5 times that grey weight is discarded in step S2.
The mass fraction of the ammonium hydroxide is 25%.
The porous additive amount is 0.2 times that grey weight is discarded in step S2.
The porous additive is porous resin material and porous carbon materials in mass ratio 1:2.5 mixing.
The preparation method of the porous resin material is：With reference to embodiment 1 in Chinese invention patent CN102408580B
Preparation method obtains epoxy resin porous material；Epoxy resin porous material is impregnated in acetone, in vacuum degasing machine (model
KK-VT300, Ha Sai Science and Technology Ltd.s of Shenzhen) in vacuumize 3 times and (make solution through gap well into more to epoxy resin
In Porous materials matrix), 3h is stood, the filtering of 500 mesh grenadines is dried in vacuo 12h at 40 DEG C；It then will be preswollen after drying
Epoxy resin porous material is immersed in the aqueous solution of acrylic monomers, and in vacuum degasing machine, (model KK-VT300, Shenzhen are breathed out
Match Science and Technology Ltd.) in vacuumize 3 times (make solution through gap well into in epoxy resin porous material matrix), stand
3h；It is stirred for 24 hours under 60 DEG C of water-baths, the rotating speed of 300r/min, nitrogen atmosphere, 500 mesh grenadines filtering, by reaction product at 60 DEG C
12h is impregnated in deionized water, the ultrasound 12h at 40 DEG C, 500 mesh grenadines filtering is dried under 80 DEG C of normal vacuums to perseverance
Weight, obtains the porous resin material.
The preparation method of the porous carbon materials is：By 0.2g m-aminophenols, the ammonium hydroxide that 0.2mL mass fractions are 25%
It is dissolved in the ethanol water that 28mL mass fractions are 30wt%, 30min is stirred at 25 DEG C, 200r/min；It is subsequently added into
0.2g cetyl trimethylammonium bromides, continuation stir 30min at 25 DEG C, 200r/min；Be added 0.3mL formaldehyde, 25 DEG C,
It is stirred 3 minutes under 200r/min；1.0mL ethyl orthosilicates are then added dropwise with the speed of 0.05g/s, at 25 DEG C, 200r/min
Stirring is for 24 hours；The reaction solution of gained is poured into autoclave pressure, is cured for 24 hours in 80 DEG C of baking oven.By centrifugation, deionized water
After washing, conventional vacuum dries 12h at 80 DEG C, obtains solid powdery sample；Powder is placed in tube furnace later, in nitrogen
Atmosphere rises to 600 DEG C from 25 DEG C with the heating rate of 3 DEG C/min under enclosing and keeps 3h at 600 DEG C, and obtained powder is with 8wt%'s
Hydrofluoric acid aqueous solution immersion treatment for 24 hours, for 24 hours using suction filtration, deionized water washing, 80 DEG C of conventional vacuums dryings, obtains porous
Carbon material.
Embodiment 8
A kind of construction method of soft foundation：
(1) by sludge curing agent and the water content 44.8wt% mud prepared by embodiment 5 in proportion 1:12 are uniformly mixed；
(2) shelving 4 hours；
(3) compaction moulding；
(4) it is conserved, 25 DEG C of curing temperature, relative humidity 85%, is conserved 10 days in curing box.
Embodiment 9
A kind of construction method of soft foundation：
(1) by sludge curing agent and the water content 44.8wt% mud prepared by embodiment 6 in proportion 1:12 are uniformly mixed；
(2) shelving 4 hours；
(3) compaction moulding；
(4) it is conserved, 25 DEG C of curing temperature, relative humidity 85%, is conserved 10 days in curing box.
Embodiment 10
A kind of construction method of soft foundation：
(1) by sludge curing agent and the water content 44.8wt% mud prepared by embodiment 7 in proportion 1:12 are uniformly mixed；
(2) shelving 4 hours；
(3) compaction moulding；
(4) it is conserved, 25 DEG C of curing temperature, relative humidity 85%, is conserved 10 days in curing box.
Each section raw material sources are as follows in embodiment：
The discarded ash of desulphurization denitration：From the discarded ash of middle building materials north group desulphurization denitration, main component is
SiO258.06%, Al2O32.46%, Fe2O31.25%, CaO 5.86%, MgO 3.9%, Na2O 1.78%, K2O
23.81%, SO31.21%.
Flyash：Suizhong Power Plant, grain size are 0.5~200 μm, meet I specified in GBT1596-2005 grades of standard.
Ardealite：CaSO4·2H2O accounts for 75wt%, the seas Qin Hua phosphoric acid plant.
Ammonium hydroxide：Mass fraction 25%, Jining City is along source Chemical Co., Ltd..
Acrylic monomers：No. CAS：79-10-7.
M-aminophenol：No. CAS：591-27-5.
Ethyl orthosilicate：No. CAS：78-10-4.
Cetyl trimethylammonium bromide：No. CAS：57-09-0.
Polyethylene oxide-polypropylene oxide-polyethylene oxide：Model：F127, Sigma-aldrich companies of the U.S..
Test case 1
Respectively in mass ratio by the mud of the sludge curing agent being prepared in Examples 1 to 7 and water content 44.8wt%
1:10 are uniformly mixed, shelving, compaction moulding, are prepared into the test specimen of 100mm × 100mm × 100mm, spray water on sample, so
Freshness protection package entangles afterwards, puts sink maintenance 7d into, curing temperature control is at 20 DEG C, relative humidity 88%.
Unconfined compression test：" become based on mechanical property before and after the lower mud improvement of different curing agent effect with reference to Liu Renzhao
Method in change " Guangdong University of Technology's master thesis in 2.3.1 unconfined compression tests is tested.
1 compressive property of table
Test case 2
Respectively in mass ratio by the mud of the sludge curing agent being prepared in Examples 1 to 7 and water content 44.8wt%
1:10 are uniformly mixed, shelving, compaction moulding, are prepared into a diameter of 100mm, are highly the cylindrical test block of 50mm, wait trying
Covered rearing with plastic film surface is used after formation of lots, is placed in temperature and is 25 DEG C, aoxidizes 28d ages in the environment of relative humidity is 88%
Phase, then according to Xinan Science and Technology Univ.'s master thesis《It is ground based on the experiment of orthogonal method pervious concrete Performance Influence Factor
Study carefully》(author：Pay Dongshan) 2.4.1 section coefficient of permeability assay method tested.
2 permeance property of table is tested
| Embodiment | Infiltration coefficient (mm/s) |
| Embodiment 1 | 14.1 |
| Embodiment 2 | 15.8 |
| Embodiment 3 | 13.6 |
| Embodiment 4 | 12.9 |
| Embodiment 5 | 12.5 |
| Embodiment 6 | 11.9 |
| Embodiment 7 | 16.2 |
From Table 2, it can be seen that the soil block after soft base sludge solidification is had well using the sludge curing agent of the present invention
Permeability resistance, can be good at bearing rainwash.
Test case 3
The utilizing solidified earth from sludge obtained respectively to embodiment 8-10, is tested, and is shown in Table 3.
3 physicochemical property of table is tested
| Cohesive strength C values, KPa | Internal friction angle value φ, ° | |
| Embodiment 8 | 50.6 | 25.8 |
| Embodiment 9 | 51.3 | 26.4 |
| Embodiment 10 | 54.5 | 28.5 |
The cohesive strength C values of above-described embodiment are more than 50KPa, and internal friction angle value φ is more than 25 °, and the mud after improvement solidification is full
The engineering soil demand of sufficient placement grinding.
Although by some embodiments describing the present invention, it is understood by one of ordinary skill in the art that can be to them
Various changes are carried out, the element of the present invention can be replaced with equivalent, the improvement that can also be needed is so that specific situation
Or material is suitable for the invention introduction, without departing from the essence and base region of the present invention.Therefore, the present invention will include falling
Enter all embodiments in scope.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiment being appreciated that.
Claims (7)
1. a kind of construction method of soft foundation, includes the following steps：(1) sludge curing agent and mud are mixed in proportion；
(2) shelving 2-6 hours；(3) compaction moulding；(4) it conserves 2-20 days.
2. construction method of soft foundation as described in claim 1, which is characterized in that in the step (1) sludge curing agent with
The mass ratio of the mud is 1：(6-20)；Preferably 1：(7-13).
3. construction method of soft foundation as described in claim 1, which is characterized in that mud moisture content is in the step (1)
40-80wt%.
4. construction method of soft foundation as described in claim 1, which is characterized in that the step (4) be in curing box into
Row maintenance, 15-30 DEG C of curing temperature, relative humidity 70-95% are conserved 2-20 days.
5. the construction method of soft foundation as described in any one of claim 1-4, which is characterized in that the sludge curing agent by
Desulphurization denitration is discarded ash, flyash, ardealite, weight alkali, porous additive and ammonium hydroxide and is mixed.
6. construction method of soft foundation as claimed in claim 5, which is characterized in that the desulphurization denitration discard ash, flyash,
Ardealite, weight alkali, porous additive, ammonium hydroxide mass ratio be 1:(0.5-1.5):(0.3-0.8):(0.1-0.4):(0.1-
0.3):(0.3-0.6)。
7. construction method of soft foundation as claimed in claim 6, which is characterized in that the mass fraction of the ammonium hydroxide is 25-
28%.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117024094A (en) * | 2023-07-10 | 2023-11-10 | 苏坤建设(江苏)有限公司 | Solid waste base high-water content soft soil curing agent and curing device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001040652A (en) * | 1999-07-29 | 2001-02-13 | Taiheiyo Cement Corp | Soil improvement method and solidifying material |
| CN101560760A (en) * | 2009-05-22 | 2009-10-21 | 中冶京唐建设有限公司 | Construction method for fast concreting and dredging and filling ultra-fine earth foundation |
| CN106836186A (en) * | 2016-12-26 | 2017-06-13 | 福建港湾岩土工程集团有限公司 | A kind of construction technology of utilizing solidified earth from sludge |
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2018
- 2018-05-07 CN CN201810426603.6A patent/CN108360495A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001040652A (en) * | 1999-07-29 | 2001-02-13 | Taiheiyo Cement Corp | Soil improvement method and solidifying material |
| CN101560760A (en) * | 2009-05-22 | 2009-10-21 | 中冶京唐建设有限公司 | Construction method for fast concreting and dredging and filling ultra-fine earth foundation |
| CN106836186A (en) * | 2016-12-26 | 2017-06-13 | 福建港湾岩土工程集团有限公司 | A kind of construction technology of utilizing solidified earth from sludge |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117024094A (en) * | 2023-07-10 | 2023-11-10 | 苏坤建设(江苏)有限公司 | Solid waste base high-water content soft soil curing agent and curing device |
| CN117024094B (en) * | 2023-07-10 | 2024-02-06 | 苏坤建设(江苏)有限公司 | Solid waste base high-water content soft soil curing agent and curing device |
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