A kind of slip casting under water of cement-based material or mud jacking block ground mass foundation construction
Technical field
The invention belongs to hydraulic engineering cement sill underwater foundation construction method.
Background technology
Many hydraulic engineerings are because be difficult to draining, and engineering has to stop work.For example in recent years, weather anomaly arid, reservoir
Retaining is more difficult, is often all difficult to retaining to autumn reservoir.Construction, shadow but Reservoir progress dam bank protection must discharge water
The retaining to reservoir is rung, peasant opposes very much, often do expediently peasant colony and hinder construction, because discharging water to have influence on down
1 year kind.For example, carrying out reservoir dam slope protection construction, basic pin groove excavation is deeper, because peasant's shield water is difficult to be constructed.Such as
Fruit can have a kind of method to realize the underwater construction technology for not discharging water or discharging water less as far as possible, then, it is possible to effectively solve this
Class protects water and the contradiction of construction, reservoir is ensured retaining conscientiously, moreover it is possible to complete the reinforcement of dam.On the other hand,
In northeast, autumn water temperature is relatively low, into October, and coolant-temperature gage is 7~8 or so, and underwater concrete, which condenses, to be affected.
The content of the invention
The present invention provides a kind of cement-based material slip casting under water or mud jacking block ground mass foundation construction, complete under water to realize
Into cement base basis or filling class formation, for hydraulic engineering, it can be ensured that hydraulic engineering cement sill structure under water can be carried out
Construction, so that reduction temporary project and effluent cost is greatly reduced, greatly improves construction speed, compared with underwater concrete construction
Construction costs can be greatly reduced, is constructed for cement base class formation under reservoir water, it can be ensured that discharge water less, many retainings, it is ensured that
Next year irrigation water.Quickly handle because osmotic pressure leak forms hole or rapid reinforcement submerged structure, can significantly carry for reservoir
High project progress, it is ensured that problem engineering is handled in time, it is ensured that engineering safety.
The present invention is adopted the technical scheme that, is comprised the following steps:
(One)Utilize hook machine excavation foundation groove, 2.5 ~ 3.5 meters of single operation length;
(Two)According to the situation of foundation trench, selection cement-based material under water apply by slip casting method or mud jacking block stone method progress basis
Work:
(1)When dug foundation trench is located under the water surface, using closed structure sizing cage, selection cement-based material is under water
Slip casting method carries out foundation construction:
The closed structure sizing cage can make under water, can also by land make and be then placed in water, by steel
Muscle, GSZ or batten work out gabion with steel wire, to prevent running pulp, gabion external application non-woven wraps or liner non-woven fabrics, nothing
The effect for spinning cloth is the water discharged in gabion and prevents that binder materials leaks in gabion, inserts grout pipe in gabion, makes this
Grout pipe is located on the water surface, is filled up with block stone after gabion, suitable for reading to be closed with non-woven fabrics and gabion top flat;
Slip casting:Slurry is injected with grouting pump low pressure, the slurry is the higher sand coarse aggregate ratio chicken girt concrete of low leaching cement base, institute
Stating the higher sand coarse aggregate ratio chicken girt concrete of low leaching cement base includes the raw material of following parts by weight:
1000 parts of common portland cement PO42.5,
More than II grade 50~500 parts of flyash,
Silicon ash, SiO2Content be more than 90%, square metre/kilogram~20000 square metre of specific surface area 13000/kilogram
20~100 parts,
1000~3000 parts of medium coarse sand,
5~10 millimeters of 100~3000 parts of particle diameter chicken girts,
1000 ~ 2460 parts of water,
Polyacrylamide(Amphoteric ion type)10~40 parts,
10~40 parts of hydroxyethyl cellulose,
0.4~60 part of high-efficiency water-reducing agent of poly-carboxylic acid,
0.03~3 part of air entraining agent;
(2)It is fixed using trench structure slip casting sizing cage or trench structure mud jacking when dug foundation trench is located on the water surface
Type cage, slip casting method or mud jacking block stone method carry out foundation construction to selection cement-based material under water:
(a)The trench structure slip casting sizing cage can make under water, can also by land make and be then placed in water,
Reinforcing bar, GSZ or batten are worked out into gabion with steel wire, to prevent running pulp, gabion external application non-woven wraps or liner nonwoven
Cloth, the effect of non-woven fabrics is the water discharged in gabion and prevents that binder materials leaks in gabion, inserts grout pipe in gabion,
The grout pipe is located on the water surface, gabion is filled up with block stone;
Slip casting:Slurry is injected with grouting pump low pressure, the slurry is the higher sand coarse aggregate ratio chicken girt concrete of low leaching cement base, institute
Stating the higher sand coarse aggregate ratio chicken girt concrete of low leaching cement base includes the raw material of following parts by weight:
1000 parts of common portland cement PO42.5,
More than II grade 50~500 parts of flyash,
Silicon ash, SiO2Content be more than 90%, square metre/kilogram~20000 square metre of specific surface area 13000/kilogram
20~100 parts,
1000~3000 parts of medium coarse sand,
5~10 millimeters of 100~3000 parts of particle diameter chicken girts,
1000 ~ 2460 parts of water,
Polyacrylamide(Amphoteric ion type)10~40 parts,
10~40 parts of hydroxyethyl cellulose,
0.4~60 part of high-efficiency water-reducing agent of poly-carboxylic acid,
0.03~3 part of air entraining agent;
(b)The trench structure mud jacking sizing cage can make under water, can also by land make and be then placed in water,
Reinforcing bar, GSZ or batten are worked out into gabion with steel wire, to prevent running pulp, gabion external application non-woven wraps or liner nonwoven
Cloth, the effect of non-woven fabrics is the water discharged in gabion and prevents that binder materials leaks in gabion;
Mud jacking block stone method:Layering laying block stone, first lays 20 cm thick block stone bodies, is poured in interlayer with chute or fistulae
The higher sand coarse aggregate ratio chicken girt concrete of self-compaction low leaching cement base, is allowed to penetrate into inside block stone layer, is accelerated with vibrating spear under slurry
It is heavy;The higher sand coarse aggregate ratio chicken girt concrete of self-compaction low leaching cement base includes the raw material of following parts by weight:
1000 parts of common portland cement PO42.5,
More than II grade 50~500 parts of flyash,
Silicon ash, SiO2Content be more than 90%, square metre/kilogram~20000 square metre of specific surface area 13000/kilogram,
20~100 parts,
1000~3000 parts of medium coarse sand,
5~20 millimeters of 100~6000 parts of particle diameter chicken girts,
1000 ~ 2460 parts of water,
Polyacrylamide(Amphoteric ion type)10~40 parts,
10~40 parts of hydroxyethyl cellulose,
0.4~60 part of high-efficiency water-reducing agent of poly-carboxylic acid,
0.03~3 part of air entraining agent,
0~30 part of crosslinking agent UN-300,
0~400 part of organobentonite,
0~4 part of silicones polyethers emulsion,
Thick plasticity-maintaining agent drops in low viscosity, and viscosity is in 0~5 part of 50 ~ 100cps;
(3)When dug foundation trench is located on the water surface, following three kinds of methods are respectively adopted:
(a)It is shaping profile using the excavation border of foundation trench, non-woven fabrics is directly laid after excavation, is buried afterwards
Pipe, then spreads block stone, then carries out slip casting, and slip casting uses the higher sand coarse aggregate ratio chicken girt concrete of low leaching cement base;
(b)In foundation trench, supporting sizing crib, crib external application sandy gravel backfill, crib liner non-woven fabrics is carried out afterwards
Pipe laying, then spreads block stone, then carries out slip casting, and slip casting uses the higher sand coarse aggregate ratio chicken girt concrete of low leaching cement base;
(c)In foundation trench, gib template cage, the backfill of template cage external application sandy gravel, crib liner non-woven fabrics, afterwards
In bottom pendulum paving block stone, the higher sand coarse aggregate ratio chicken girt concrete of self-compaction low leaching cement base is poured with chute or fistulae in interlayer,
It is allowed to penetrate into inside block stone layer, accelerates slurry to sink with vibrating spear, above pull out removable gib template cage, then be thrown into one layer
Block stone, repeats the above steps, until top;
(Three)Check, after slurry injection, if after a period of time, local slurry liquid level sinking, needs carry out again in time
Once mend slurry.
The present invention using shape cage shaping or using basis excavation border be profile, using under water to pave block clitter product
Body, which injects the higher sand coarse aggregate ratio chicken girt concrete of preferable mobility or can fill block with its self-leveling, paves stone accumulation body gap,
Realize underwater cement sill slip casting block stone or the construction of mud jacking block stone structure.Material Physics mechanical property is better than stone masonry, slightly poor
In concrete.
It is an advantage of the invention that:Slip casting under water or mud jacking block stone foundation construction are carried out, can not when the depth of water is less than one meter
Directly constructed with draining, can greatly improve construction speed, reduced construction cost, constructed when for Reservoir, can be with
Waterdrainage amount is greatly reduced, under the premise of as far as possible many retainings are effectively ensured, construction is completed.
Brief description of the drawings
Fig. 1 a are the closed structure sizing cage that the present invention is used, liner non-woven fabrics;
Fig. 1 b are the closed structure sizing cage that the present invention is used, outsourcing non-woven fabrics;
Fig. 2 a are the trench structure slip casting sizing cage that the present invention is used, liner non-woven fabrics;
Fig. 2 b are the trench structure slip casting sizing cage that the present invention is used, outsourcing non-woven fabrics;
Fig. 2 c are the trench structure mud jacking sizing cage that the present invention is used, liner non-woven fabrics;
Fig. 2 d are the trench structure mud jacking sizing cage that the present invention is used, outsourcing non-woven fabrics;
It is that paver mud jacking shows in the outer filler cage of cage in mud jacking block stone process chart in case history of the present invention, figure that Fig. 3 a, which are,
It is intended to;
It is to repeat previous step after upper withdrawing pattern plate cage in mud jacking block stone process chart in case history of the present invention, figure that Fig. 3 b, which are,
Schematic diagram;
It is to repeat two, three steps to pushing up schematic diagram in mud jacking block stone process chart in case history of the present invention, figure that Fig. 3 c, which are,;
It is adjustment top block stone and coagulation grave in mud jacking block stone process chart in case history of the present invention, figure that Fig. 3 d, which are,
Push up schematic diagram;In figure:
Closed structure sizing cage 1, non-woven fabrics 2, grout pipe 3, trench structure slip casting sizing cage 4, gib sizing wood
Cage 5, sandy gravel 6, pendulum paving block stone 7, the higher sand coarse aggregate ratio chicken girt concrete eight of low leaching cement base.
Embodiment
Embodiment 1
Comprise the following steps:
(One)Utilize hook machine excavation foundation groove, 2.5 ~ 3.5 meters of single operation length;
(Two)According to the situation of foundation trench, selection cement-based material under water apply by slip casting method or mud jacking block stone method progress basis
Work:
(1)When dug foundation trench is located under the water surface, using closed structure sizing cage, selection cement-based material is under water
Slip casting method carries out foundation construction:
The closed structure sizing cage can make under water, can also by land make and be then placed in water, by steel
Muscle, GSZ or batten work out gabion with steel wire, to prevent running pulp, gabion external application non-woven wraps or liner non-woven fabrics, nothing
The effect for spinning cloth is the water discharged in gabion and prevents that binder materials leaks in gabion, inserts grout pipe in gabion, makes this
Grout pipe is located on the water surface, is filled up with block stone after gabion, suitable for reading to be closed with non-woven fabrics and gabion top flat;
Slip casting:Slurry is injected with grouting pump low pressure, the slurry is the higher sand coarse aggregate ratio chicken girt concrete of low leaching cement base, institute
Stating the higher sand coarse aggregate ratio chicken girt concrete of low leaching cement base includes the raw material of following parts by weight:
1000 parts of common portland cement PO42.5,
More than II grade 50 parts of flyash,
Silicon ash, SiO2Content be more than 90%, square metre/kilogram~20000 square metre of specific surface area 13000/kilogram
20 parts,
1000 parts of medium coarse sand,
5~10 millimeters of 100 parts of particle diameter chicken girts,
1000 parts of water,
Polyacrylamide(Amphoteric ion type)10 parts,
10 parts of hydroxyethyl cellulose,
0.4 part of high-efficiency water-reducing agent of poly-carboxylic acid,
0.03 part of air entraining agent;
(2)It is fixed using trench structure slip casting sizing cage or trench structure mud jacking when dug foundation trench is located on the water surface
Type cage, slip casting method or mud jacking block stone method carry out foundation construction to selection cement-based material under water:
(a)The trench structure slip casting sizing cage can make under water, can also by land make and be then placed in water,
Reinforcing bar, GSZ or batten are worked out into gabion with steel wire, to prevent running pulp, gabion external application non-woven wraps or liner nonwoven
Cloth, the effect of non-woven fabrics is the water discharged in gabion and prevents that binder materials leaks in gabion, inserts grout pipe in gabion,
The grout pipe is located on the water surface, gabion is filled up with block stone;
Slip casting:Slurry is injected with grouting pump low pressure, the slurry is the higher sand coarse aggregate ratio chicken girt concrete of low leaching cement base, institute
Stating the higher sand coarse aggregate ratio chicken girt concrete of low leaching cement base includes the raw material of following parts by weight:
1000 parts of common portland cement PO42.5,
More than II grade 50 parts of flyash,
Silicon ash, SiO2Content be more than 90%, square metre/kilogram~20000 square metre of specific surface area 13000/kilogram
20 parts,
1000 parts of medium coarse sand,
5~10 millimeters of 100 parts of particle diameter chicken girts,
1000 parts of water,
Polyacrylamide(Amphoteric ion type)10 parts,
10 parts of hydroxyethyl cellulose,
0.4 part of high-efficiency water-reducing agent of poly-carboxylic acid,
0.03 part of air entraining agent;
(b)The trench structure mud jacking sizing cage can make under water, can also by land make and be then placed in water,
Reinforcing bar, GSZ or batten are worked out into gabion with steel wire, to prevent running pulp, gabion external application non-woven wraps or liner nonwoven
Cloth, the effect of non-woven fabrics is the water discharged in gabion and prevents that binder materials leaks in gabion;
Mud jacking block stone method:Layering laying block stone, first lays 20 cm thick block stone bodies, is poured in interlayer with chute or fistulae
The higher sand coarse aggregate ratio chicken girt concrete of self-compaction low leaching cement base, is allowed to penetrate into inside block stone layer, is accelerated with vibrating spear under slurry
It is heavy;The higher sand coarse aggregate ratio chicken girt concrete of self-compaction low leaching cement base includes the raw material of following parts by weight:
1000 parts of common portland cement PO42.5,
More than II grade 50 parts of flyash,
Silicon ash, SiO2Content be more than 90%, square metre/kilogram~20000 square metre of specific surface area 13000/kilogram
20 parts,
1000 parts of medium coarse sand,
5~20 millimeters of 100 parts of particle diameter chicken girts,
1000 parts of water,
Polyacrylamide(Amphoteric ion type)10 parts,
10 parts of hydroxyethyl cellulose,
0.4 part of high-efficiency water-reducing agent of poly-carboxylic acid,
0.03 part of air entraining agent,
(3)When dug foundation trench is located on the water surface, following three kinds of methods are respectively adopted:
(a)It is shaping profile using the excavation border of foundation trench, non-woven fabrics is directly laid after excavation, is buried afterwards
Pipe, then spreads block stone, then carries out slip casting, and slip casting uses the higher sand coarse aggregate ratio chicken girt concrete of low leaching cement base;
(b)In foundation trench, supporting sizing crib, crib external application sandy gravel backfill, crib liner non-woven fabrics is carried out afterwards
Pipe laying, then spreads block stone, then carries out slip casting, and slip casting uses the higher sand coarse aggregate ratio chicken girt concrete of low leaching cement base;
(c)In foundation trench, gib template cage, the backfill of template cage external application sandy gravel, crib liner non-woven fabrics, afterwards
In bottom pendulum paving block stone, the higher sand coarse aggregate ratio chicken girt concrete of self-compaction low leaching cement base is poured with chute or fistulae in interlayer,
It is allowed to penetrate into inside block stone layer, accelerates slurry to sink with vibrating spear, above pull out removable gib template cage, then be thrown into one layer
Block stone, repeats the above steps, until top;
(Three)Check, after slurry injection, if after a period of time, local slurry liquid level sinking, needs carry out again in time
Once mend slurry.
Embodiment 2
Comprise the following steps:
(One)Utilize hook machine excavation foundation groove, 2.5 ~ 3.5 meters of single operation length;
(Two)According to the situation of foundation trench, selection cement-based material under water apply by slip casting method or mud jacking block stone method progress basis
Work:
(1)When dug foundation trench is located under the water surface, using closed structure sizing cage, selection cement-based material is under water
Slip casting method carries out foundation construction:
The closed structure sizing cage can make under water, can also by land make and be then placed in water, by steel
Muscle, GSZ or batten work out gabion with steel wire, to prevent running pulp, gabion external application non-woven wraps or liner non-woven fabrics, nothing
The effect for spinning cloth is the water discharged in gabion and prevents that binder materials leaks in gabion, inserts grout pipe in gabion, makes this
Grout pipe is located on the water surface, is filled up with block stone after gabion, suitable for reading to be closed with non-woven fabrics and gabion top flat;
Slip casting:Slurry is injected with grouting pump low pressure, the slurry is the higher sand coarse aggregate ratio chicken girt concrete of low leaching cement base, institute
Stating the higher sand coarse aggregate ratio chicken girt concrete of low leaching cement base includes the raw material of following parts by weight:
1000 parts of common portland cement PO42.5,
More than II grade 275 parts of flyash,
Silicon ash, SiO2Content be more than 90%, square metre/kilogram~20000 square metre of specific surface area 13000/kilogram
60 parts,
2000 parts of medium coarse sand,
5~10 millimeters of 1550 parts of particle diameter chicken girts,
1730 parts of water,
Polyacrylamide(Amphoteric ion type)25 parts,
25 parts of hydroxyethyl cellulose,
32.2 parts of high-efficiency water-reducing agent of poly-carboxylic acid,
1.51 parts of air entraining agent;
(2)It is fixed using trench structure slip casting sizing cage or trench structure mud jacking when dug foundation trench is located on the water surface
Type cage, slip casting method or mud jacking block stone method carry out foundation construction to selection cement-based material under water:
(a)The trench structure slip casting sizing cage can make under water, can also by land make and be then placed in water,
Reinforcing bar, GSZ or batten are worked out into gabion with steel wire, to prevent running pulp, gabion external application non-woven wraps or liner nonwoven
Cloth, the effect of non-woven fabrics is the water discharged in gabion and prevents that binder materials leaks in gabion, inserts grout pipe in gabion,
The grout pipe is located on the water surface, gabion is filled up with block stone;
Slip casting:Slurry is injected with grouting pump low pressure, the slurry is the higher sand coarse aggregate ratio chicken girt concrete of low leaching cement base, institute
Stating the higher sand coarse aggregate ratio chicken girt concrete of low leaching cement base includes the raw material of following parts by weight:
1000 parts of common portland cement PO42.5,
More than II grade 275 parts of flyash,
Silicon ash, SiO2Content be more than 90%, square metre/kilogram~20000 square metre of specific surface area 13000/kilogram
60 parts,
2000 parts of medium coarse sand,
5~10 millimeters of 1550 parts of particle diameter chicken girts,
1730 parts of water,
Polyacrylamide(Amphoteric ion type)25 parts,
25 parts of hydroxyethyl cellulose,
30.2 parts of high-efficiency water-reducing agent of poly-carboxylic acid,
1.51 parts of air entraining agent;
(b)The trench structure mud jacking sizing cage can make under water, can also by land make and be then placed in water,
Reinforcing bar, GSZ or batten are worked out into gabion with steel wire, to prevent running pulp, gabion external application non-woven wraps or liner nonwoven
Cloth, the effect of non-woven fabrics is the water discharged in gabion and prevents that binder materials leaks in gabion;
Mud jacking block stone method:Layering laying block stone, first lays 20 cm thick block stone bodies, is poured in interlayer with chute or fistulae
The higher sand coarse aggregate ratio chicken girt concrete of self-compaction low leaching cement base, is allowed to penetrate into inside block stone layer, is accelerated with vibrating spear under slurry
It is heavy;The higher sand coarse aggregate ratio chicken girt concrete of self-compaction low leaching cement base includes the raw material of following parts by weight:
1000 parts of common portland cement PO42.5,
More than II grade 275 parts of flyash,
Silicon ash, SiO2Content be more than 90%, square metre/kilogram~20000 square metre of specific surface area 13000/kilogram
60 parts,
2000 parts of medium coarse sand,
5~20 millimeters of 3050 parts of particle diameter chicken girts,
1730 parts of water,
Polyacrylamide(Amphoteric ion type)25 parts,
25 parts of hydroxyethyl cellulose,
30.2 parts of high-efficiency water-reducing agent of poly-carboxylic acid,
1.51 parts of air entraining agent,
15 parts of crosslinking agent UN-300,
200 parts of organobentonite,
2 parts of silicones polyethers emulsion,
Thick plasticity-maintaining agent drops in low viscosity, and viscosity is in 2.5 parts of 50 ~ 100cps;
(3)When dug foundation trench is located on the water surface, following three kinds of methods are respectively adopted:
(a)It is shaping profile using the excavation border of foundation trench, non-woven fabrics is directly laid after excavation, is buried afterwards
Pipe, then spreads block stone, then carries out slip casting, and slip casting uses the higher sand coarse aggregate ratio chicken girt concrete of low leaching cement base;
(b)In foundation trench, supporting sizing crib, crib external application sandy gravel backfill, crib liner non-woven fabrics is carried out afterwards
Pipe laying, then spreads block stone, then carries out slip casting, and slip casting uses the higher sand coarse aggregate ratio chicken girt concrete of low leaching cement base;
(c)In foundation trench, gib template cage, the backfill of template cage external application sandy gravel, crib liner non-woven fabrics, afterwards
In bottom pendulum paving block stone, the higher sand coarse aggregate ratio chicken girt concrete of self-compaction low leaching cement base is poured with chute or fistulae in interlayer,
It is allowed to penetrate into inside block stone layer, accelerates slurry to sink with vibrating spear, above pull out removable gib template cage, then be thrown into one layer
Block stone, repeats the above steps, until top;
(Three)Check, after slurry injection, if after a period of time, local slurry liquid level sinking, needs carry out again in time
Once mend slurry.
Embodiment 3
Comprise the following steps:
(One)Utilize hook machine excavation foundation groove, 2.5 ~ 3.5 meters of single operation length;
(Two)According to the situation of foundation trench, selection cement-based material under water apply by slip casting method or mud jacking block stone method progress basis
Work:
(1)When dug foundation trench is located under the water surface, using closed structure sizing cage, selection cement-based material is under water
Slip casting method carries out foundation construction:
The closed structure sizing cage can make under water, can also by land make and be then placed in water, by steel
Muscle, GSZ or batten work out gabion with steel wire, to prevent running pulp, gabion external application non-woven wraps or liner non-woven fabrics, nothing
The effect for spinning cloth is the water discharged in gabion and prevents that binder materials leaks in gabion, inserts grout pipe in gabion, makes this
Grout pipe is located on the water surface, is filled up with block stone after gabion, suitable for reading to be closed with non-woven fabrics and gabion top flat;
Slip casting:Slurry is injected with grouting pump low pressure, the slurry is the higher sand coarse aggregate ratio chicken girt concrete of low leaching cement base, institute
Stating the higher sand coarse aggregate ratio chicken girt concrete of low leaching cement base includes the raw material of following parts by weight:
1000 parts of common portland cement PO42.5,
More than II grade 500 parts of flyash,
Silicon ash, SiO2Content be more than 90%, square metre/kilogram~20000 square metre of specific surface area 13000/kilogram
100 parts,
3000 parts of medium coarse sand,
5~10 millimeters of 3000 parts of particle diameter chicken girts,
2460 parts of water,
Polyacrylamide(Amphoteric ion type)40 parts,
40 parts of hydroxyethyl cellulose,
60 parts of high-efficiency water-reducing agent of poly-carboxylic acid,
3 parts of air entraining agent;
(2)It is fixed using trench structure slip casting sizing cage or trench structure mud jacking when dug foundation trench is located on the water surface
Type cage, slip casting method or mud jacking block stone method carry out foundation construction to selection cement-based material under water:
(a)The trench structure slip casting sizing cage can make under water, can also by land make and be then placed in water,
Reinforcing bar, GSZ or batten are worked out into gabion with steel wire, to prevent running pulp, gabion external application non-woven wraps or liner nonwoven
Cloth, the effect of non-woven fabrics is the water discharged in gabion and prevents that binder materials leaks in gabion, inserts grout pipe in gabion,
The grout pipe is located on the water surface, gabion is filled up with block stone;
Slip casting:Slurry is injected with grouting pump low pressure, the slurry is the higher sand coarse aggregate ratio chicken girt concrete of low leaching cement base, institute
Stating the higher sand coarse aggregate ratio chicken girt concrete of low leaching cement base includes the raw material of following parts by weight:
1000 parts of common portland cement PO42.5,
More than II grade 500 parts of flyash,
Silicon ash, SiO2Content be more than 90%, square metre/kilogram~20000 square metre of specific surface area 13000/kilogram
100 parts,
3000 parts of medium coarse sand,
5~10 millimeters of 3000 parts of particle diameter chicken girts,
2460 parts of water,
Polyacrylamide(Amphoteric ion type)40 parts,
40 parts of hydroxyethyl cellulose,
60 parts of high-efficiency water-reducing agent of poly-carboxylic acid,
3 parts of air entraining agent;
(b)The trench structure mud jacking sizing cage can make under water, can also by land make and be then placed in water,
Reinforcing bar, GSZ or batten are worked out into gabion with steel wire, to prevent running pulp, gabion external application non-woven wraps or liner nonwoven
Cloth, the effect of non-woven fabrics is the water discharged in gabion and prevents that binder materials leaks in gabion;
Mud jacking block stone method:Layering laying block stone, first lays 20 cm thick block stone bodies, is poured in interlayer with chute or fistulae
The higher sand coarse aggregate ratio chicken girt concrete of self-compaction low leaching cement base, is allowed to penetrate into inside block stone layer, is accelerated with vibrating spear under slurry
It is heavy;The higher sand coarse aggregate ratio chicken girt concrete of self-compaction low leaching cement base includes the raw material of following parts by weight:
1000 parts of common portland cement PO42.5,
More than II grade 500 parts of flyash,
Silicon ash, SiO2Content be more than 90%, square metre/kilogram~20000 square metre of specific surface area 13000/kilogram
100 parts,
3000 parts of medium coarse sand,
5~20 millimeters of 6000 parts of particle diameter chicken girts,
2460 parts of water,
Polyacrylamide(Amphoteric ion type)40 parts,
40 parts of hydroxyethyl cellulose,
60 parts of high-efficiency water-reducing agent of poly-carboxylic acid,
3 parts of air entraining agent,
30 parts of crosslinking agent UN-300,
400 parts of organobentonite,
4 parts of silicones polyethers emulsion,
Thick plasticity-maintaining agent drops in low viscosity, and viscosity is in 5 parts of 50 ~ 100cps;
(3)When dug foundation trench is located on the water surface, following three kinds of methods are respectively adopted:
(a)It is shaping profile using the excavation border of foundation trench, non-woven fabrics is directly laid after excavation, is buried afterwards
Pipe, then spreads block stone, then carries out slip casting, and slip casting uses the higher sand coarse aggregate ratio chicken girt concrete of low leaching cement base;
(b)In foundation trench, supporting sizing crib, crib external application sandy gravel backfill, crib liner non-woven fabrics is carried out afterwards
Pipe laying, then spreads block stone, then carries out slip casting, and slip casting uses the higher sand coarse aggregate ratio chicken girt concrete of low leaching cement base;
(c)In foundation trench, gib template cage, the backfill of template cage external application sandy gravel, crib liner non-woven fabrics, afterwards
In bottom pendulum paving block stone, the higher sand coarse aggregate ratio chicken girt concrete of self-compaction low leaching cement base is poured with chute or fistulae in interlayer,
It is allowed to penetrate into inside block stone layer, accelerates slurry to sink with vibrating spear, above pull out removable gib template cage, then be thrown into one layer
Block stone, repeats the above steps, until top;
(Three)Check, after slurry injection, if after a period of time, local slurry liquid level sinking, needs carry out again in time
Once mend slurry.
Case history:
Because long-term rainfall is low or even without rainfall, certain small reservoir can not store water, one rainfall of autumn, reservoir for 1 year
Limited a part of water is only stored, when the basic pin groove of dam bank protection for carrying out Reservoir is constructed, reservoir discharges water by locality
Risking one's life for peasant is obstructed.Because reservoir does not have water, Second Year peasant soaked field just turns into problem.In this case, finally use
The technology of the present invention completes the construction of foundation trench.Such as Fig. 3 a ~ Fig. 3 d, using the liner non-woven fabrics gabion of wood lath colligation, adopt
Completed to construct with mud jacking block stone method.
Specific construction engineering method is as follows:
1. utilizing hook machine excavation foundation groove, to reduce the quantities of wall caving, 3 meters of length of selection are single operation length;
2. the provisional dismantled and assembled plank cage of establishment, liner non-woven fabrics is put under cage water according to construction length and positioned,
Permeable material is clogged at cage two ends according to interior height of rockfilling, while bottom overlays one layer of about 20 centimetres of chunk stone in cage.With hydroxyl
Ethyl cellulose is main material, and polyacrylamide is auxiliary material, the higher sand coarse aggregate ratio chicken girt concrete of mixing low leaching cement base, by slipping
Groove is sent under water, such as Fig. 3 a.
3. after slurry pressed-in block stone accumulation body, will above pull out removable decking cage by vibrating using vibrator, second is repeated
Step, such as Fig. 3 b.
4. two, three steps are repeated, until top, such as Fig. 3 c.
5. top concrete block stone particle diameter is suitably adjusted, while adjusting the higher sand coarse aggregate ratio chicken girt concrete of low leaching cement base
Chicken girt particle diameter, binds.
6. into next subjob.