CN109680696A - Sand slope method for protecting support - Google Patents
Sand slope method for protecting support Download PDFInfo
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- CN109680696A CN109680696A CN201910120262.4A CN201910120262A CN109680696A CN 109680696 A CN109680696 A CN 109680696A CN 201910120262 A CN201910120262 A CN 201910120262A CN 109680696 A CN109680696 A CN 109680696A
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- sandy soils
- gradient
- water injection
- pressure
- injection pipe
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
- E02D17/202—Securing of slopes or inclines with flexible securing means
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/11—Improving or preserving soil or rock, e.g. preserving permafrost soil by thermal, electrical or electro-chemical means
Abstract
The invention discloses a kind of sand slope method for protecting support, and steps are as follows: 1) concrete pile is constructed；2) it is laid with longitudinal reinforcement and transverse steel in the extexine of sand slope, the reinforcement welding on steel mesh and adjacent concrete pile；3) it is first gradient in the range of upward 1.8~2 meters of side slope bottom, the sandy soils of first gradient is solidified；4) the sandy soils solidification of the second gradient is carried out in the top of the sandy soils of first gradient, the height of the sandy soils of the second gradient is 3.5 meters, is solidified according to the curing mode of the sandy soils of first gradient to the sandy soils of the second gradient；5) step 4) is repeated, until the sandy soils solidification of remaining side slope finishes.The present invention is integral with steel mesh shape after solidifying sand, and fast reaction generates the very high CaCO of intensity after chemical solution penetrates into sandy soils3, to enhance the intensity after entire sandy soils solidify.
Description
Technical field
The present invention relates to a kind of slope protection measure more particularly to a kind of sand slope method for protecting support.
Background technique
The road that slope protection refers in order to avoid being exposed in atmosphere by the natural causes repeated action such as water, temperature, wind
Peeling off occur in dike and cut slope slope surface, it is broken fall, wash away or surface layer solifluction collapses etc. destroy and measure that slope surface is protected.
Slope protection facility, is not subject to external force, must be requested that slope surface ground monolithic stability is secured.The side of Simple protecting
Slope height should not be too large with the gradient, and the soil-slope gradient is not generally suddenly in 1:1~1:1.5.The through flow velocity of the surface water is not to surpass
Crossing 2.0m/s is advisable, and water should not also concentrate confluence.When rainwater is concentrated or catchment area is larger, there should be pumping equipment to match, such as
Intercepting ditch is set at the top of execavated rockmass, the road shoulder edge of high roadbed, which is set, blocks water ridge etc..
Although there is Research Team studying sandy ground reinforcement technique at present, the biomineralization being widely present using nature
One kind of journey, microorganism induction precipitation of calcium carbonate method, i.e., according to hydrolysis of urea microorganism induction precipitation of calcium carbonate mechanism, from biology
Reactant (urea, NH4 +, calcium ion concentration), catalyst (bacterium and urase concentration) and reaction density (pH value and temperature) be to urine
Element is hydrolyzed, and precipitation of calcium carbonate is generated in sandy ground, and then solidify to sandy ground, and the method is also referred to as the solid local method of biology.
But in the prior art, still lack to the effective safeguard procedures of sand slope.
Summary of the invention
Place in view of the above-mentioned deficiencies in the prior art, the present invention provides a kind of sand slope method for protecting support.
In order to solve the above-mentioned technical problem, present invention employs following technical solutions:
Sand slope method for protecting support, this method comprises the following steps:
1) concrete pile is constructed: set gradually multiple rows of concrete pile from bottom to top along sand slope, the specific steps are；
1.1) base pile hole is bored from bottom to top along sand slope, the base pile hole puts in lithosphere 1.5 from the sandy soils on surface layer
~2 meters；The base pile hole is interior low outer high angling hole, and the tilt angle of base pile hole is 2~3 °；
1.2) steel reinforcement cage is mounted in base pile hole, is then poured concrete；
2) longitudinal reinforcement and transverse steel, the longitudinal direction steel are laid with according to 1.5 meters of spacing in the extexine of sand slope
Muscle and transverse steel are embedded in sandy soils and steel mesh is welded and formed in crosspoint, and the steel mesh is mixed with adjacent
Reinforcement welding in solidifying soil matrix stake；
3) it is first gradient in the range of upward 1.8~2 meters of side slope bottom, the sandy soils of first gradient is consolidated
Change:
3.1) several water injection holes are uniformly bored on the sandy soils of first gradient, the depth of water injection hole is the thickness of sandy soils
Degree, and injector is installed in water injection hole, 0.5 meter is separated by between adjacent injector, the injector includes water injection pipe I and package
Geotextiles I on water injection pipe I are uniformly arranged multiple apopores I on water injection pipe I, are provided with air hose in the water injection pipe I,
Multiple gas ports are uniformly arranged on the air hose；
3.2) it is laid with geotextiles II on the sandy soils of first gradient, and is laid with one layer of sealing film outside geotextiles II,
Pressure plate is set outside sealing film, and the geotextiles II, sealing film and pressure plate pass through corresponding concrete pile, sealing
Film and concrete pile sealing cooperate, and the pressure device to pressure plate pressurization, the water filling are provided on the concrete pile
Pipe I and air hose stretch out geotextiles II, sealing film and pressure plate, pass through the position of sealing film to water injection pipe I with sealing ring
It is sealed, so that the sandy soils of first gradient is in sealing state by pressure plate；The air hose is located at one outside sandy soils
End is bent from the one side wall of water injection pipe I to be stretched out, and air hose stretches out the tube wall part sealing of water injection pipe I；
3.3) the top of pressure plate and be close to sandy soils side be horizontally disposed with a water injection pipe II, the water injection pipe II
The side for being close to sandy soils is uniformly arranged multiple apopores II；
3.4) air hose is connect by hose with air pump, by water injection pipe I and water injection pipe II to the sand of first gradient
Bacterium is injected in layer, waits bacteriums will be until the sandy soils wetting thoroughly of entire first gradient；
3.5) chemical solution is injected into the sandy soils of first gradient by water injection pipe I and water injection pipe II, makes first gradient
Sandy soils be immersed in chemical solution, air is passed through into air hose by air pump, is led by gas port into chemical solution
Enter air to increase oxygen composition, can achieve the purpose that improve catalytic；1.5- is impregnated in the sandy soils of first gradient
After 2.5 hours, first stage pressurization is implemented to pressure plate by pressure device, pressure is 0.5 Kilogram Force Per Square Centimeter, the first rank
Section pressing time be 1.5-2 hour, then by pressure device to pressure plate implement second stage pressurization, pressure for 0.7 Kgf/
Square centimeter, second stage pressing time are 2-2.2 hours, then implement phase III pressurization, pressure to pressure plate by pressure device
Power is 0.8 Kilogram Force Per Square Centimeter, is always maintained at the pressure after phase III pressurization；The chemical solution is by urea, NH4 +With
Ca2+The nutrient solution of form in water is added to after mixing；
3.6) after reacting 10 days, the sandy soils solidification of first gradient is finished, and removes pressure device, pressure plate, sealing film, soil
Work cloth II and water injection pipe II；
4) the sandy soils solidification of the second gradient is carried out in the top of the sandy soils of first gradient, the sandy soils of the second gradient
Height is 3.5 meters, is solidified according to the curing mode of the sandy soils of first gradient to the sandy soils of the second gradient；
5) step 4) is repeated, until the sandy soils solidification of entire side slope finishes.
As a preferred solution of the present invention, the bacterium selects Bacillus pasteurii.
As another preferred embodiment of the invention, the pressure device includes pressure bar, hydraulic cylinder and pressure sensor, institute
The one end for stating pressure bar is fixedly connected on corresponding concrete pile, and the cylinder body of hydraulic cylinder is fixed on the other end of pressure bar
On, the piston rod of the hydraulic cylinder stretches to pressure plate, the pressure sensor be arranged in the lower part of the piston rod of hydraulic cylinder and with
Pressure plate is corresponding.
Compared with prior art, the present invention has the following technical effect that
1, the present invention is laid with steel mesh in the extexine of sand slope, integral with steel mesh shape after sand solidification, together
When steel mesh connect with concrete pile, the sandy soils stress once solidified, and transmitting that force in lithosphere, entire sand
Structure is stronger after native side slope solidification, and sand slope protection effect is best.
2, in sand solidification process, it is uniformly arranged injector and air hose on sandy soils, entire sandy soils is made to be in chemistry
In solution, a large amount of oxygen is passed through into sandy soils by air hose, reaction can be made more abundant, facilitate nutrient solution, chemistry
Solution is penetrated into silt soil by geotextiles, generates a large amount of CaCO3, solidify sandy soils effectively.Sandy soils solidification
Afterwards, surfacing, inner texture is uniform, and intensity is high.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of sand slope construction of prevention work；
Fig. 2 is that steel reinforcement cage is mounted on the structural schematic diagram in base pile hole；
Fig. 3 is the structural schematic diagram of injector；
Fig. 4 is the structural schematic diagram of pressure device.
In figure: 1-concrete pile；2-base pile holes；3-sandy soils；4-lithospheres；5-steel reinforcement cages；6-longitudinal steel
Muscle；7-transverse steels；8-injectors；9-water injection pipes I；10-geotextiles I；11-apopores I；12-air hoses；13-lead
Stomata；14-geotextiles II；15-sealing films；16-pressure plates；17-pressure devices；18-water injection pipes II；19-pressure bars；
20-hydraulic cylinders；21-pressure sensors.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and detailed description.
Sand slope method for protecting support, this method comprises the following steps:
1) concrete pile is constructed: set gradually multiple rows of concrete pile 1 from bottom to top along sand slope, as shown in Figure 1,
The specific steps are；
1.1) base pile hole 2 is bored from bottom to top along sand slope, base pile hole 2 puts in lithosphere 4 from the sandy soils 3 on surface layer, stretches
Depth degree is 1.5~2 meters；Base pile hole 2 is interior low outer high angling hole, and the tilt angle of base pile hole 2 is 2~3 °.
1.2) steel reinforcement cage 5 is mounted in base pile hole 2, is then poured concrete, as shown in Figure 2.
2) longitudinal reinforcement 6 and transverse steel 7, longitudinal reinforcement 6 are laid with according to 1.5 meters of spacing in the extexine of sand slope
It is embedded in sandy soils 3 with transverse steel 7 and steel mesh, steel mesh and adjacent concrete are welded and formed in crosspoint
Reinforcement welding on foundation pile.
3) it is first gradient in the range of upward 1.8~2 meters of side slope bottom, the sandy soils 3 of first gradient is consolidated
Change:
3.1) several water injection holes are uniformly bored on the sandy soils of first gradient 3, the depth of water injection hole is the thickness of sandy soils 3
Degree, and injector 8 is installed in water injection hole, 0.5 meter is separated by between adjacent injector 8, injector 8 includes water injection pipe I 9 and package
Geotextiles I 10 on water injection pipe I 9, (liquids and gases in water injection pipe I 9 smooth can enter sand by geotextiles I 10
It is interior, and geotextiles I 10 can effectively prevent sand to enter in water injection pipe I 9), multiple apopores I 11 are uniformly arranged on water injection pipe I 9,
It is provided with air hose 12 in water injection pipe I 9, multiple gas ports 13 are uniformly arranged on air hose 12.
3.2) it is laid with geotextiles II 14 on the sandy soils of first gradient 3, and is laid with one layer of sealing outside geotextiles II 14
Film 15, is arranged pressure plate 16 outside sealing film 15, and geotextiles II 14, sealing film 15 and pressure plate 16 pass through corresponding mixed
Solidifying soil matrix stake 1, sealing film 15 and the sealing of concrete pile 1 cooperate, and are provided on concrete pile 1 to the pressurization of pressure plate 16
Pressure device 17, water injection pipe I 9 and air hose 12 stretch out geotextiles II 14, sealing film 15 and pressure plate 16, with sealing ring to water filling
The position that pipe I 9 passes through sealing film 15 is sealed, and so that the sandy soils 3 of first gradient is in sealing state by pressure plate 16.
Air hose 12 is located at one end outside sandy soils 3 and bends stretching from the one side wall of water injection pipe I 9, and air hose 12 stretches out water injection pipe I 9
The sealing of tube wall part, as shown in Figure 3.
3.3) the top of pressure plate 16 and be close to sandy soils side be horizontally disposed with a water injection pipe II 18, water injection pipe II
18 sides for being close to sandy soils are uniformly arranged multiple apopores II.
3.4) air hose is connect by hose with air pump, by water injection pipe I 9 and water injection pipe II 18 to the sand of first gradient
Soil layer 3 is interior to inject bacterium (bacterium selects Bacillus pasteurii), waits bacteriums to soak the sandy soils 3 of entire first gradient and is
Only.
3.5) chemical solution is injected into the sandy soils 3 of first gradient by water injection pipe I 9 and water injection pipe II 18, makes first
The sandy soils 3 of gradient are immersed in chemical solution, are passed through air into air hose 12 by air pump, by gas port 13 to chemistry
Air is imported in solution to increase oxygen composition, can achieve the purpose that improve catalytic；In the sandy soils 3 of first gradient
After impregnating 1.5-2.5 hours, first stage pressurization is implemented to pressure plate 16 by pressure device 17, pressure is 0.5 Kgf/square
Centimetre, pressing time first stage is 1.5-2 hours, second stage pressurization is then implemented to pressure plate 16 by pressure device 17,
Pressure is 0.7 Kilogram Force Per Square Centimeter, and second stage pressing time is 2-2.2 hours, then by pressure device 17 to pressure plate 16
Implement phase III pressurization, pressure is 0.8 Kilogram Force Per Square Centimeter, is always maintained at the pressure after phase III pressurization；Chemical solution
Liquid is by urea, NH4 +And Ca2+The nutrient solution of form in water is added to after mixing.
3.6) after reacting 10 days, the solidification of sandy soils 3 of first gradient is finished, and removes pressure device 17, pressure plate 16, sealed thin
Film 15, geotextiles II 14 and water injection pipe II 18.
4) solidify in the sandy soils 3 that the top of the sandy soils of first gradient 3 carries out the second gradient, the sandy soils of the second gradient
3 height is 3.5 meters, is solidified according to the curing mode of the sandy soils 3 of first gradient to the sandy soils 3 of the second gradient.
5) step 4) is repeated, until the solidification of sandy soils 3 of entire side slope finishes.
In the present embodiment, pressure device is as shown in figure 4, pressure device 17 includes pressure bar 19, hydraulic cylinder 20 and pressure sensing
One end of device 21, pressure bar 19 is fixedly connected on corresponding concrete pile 1, and the cylinder body of hydraulic cylinder 20 is fixed on pressure bar 19
The other end on, the piston rod of hydraulic cylinder 20 stretches to pressure plate 16, and the piston rod of hydraulic cylinder 20 is arranged in pressure sensor 21
Lower part is simultaneously corresponding with pressure plate 16, and the piston rod of hydraulic cylinder 20 is stretched out to pressure plate 16 and pressed to pressure plate 16, the pressure of application
Power is obtained by pressure sensor 21.
Chemical solution is by urea, NH4 +And Ca2+It is added to the nutrient solution of form in water after mixing, penetrates into sandy soils 3
Fast reaction generates the very high CaCO of intensity afterwards3, to enhance the intensity after entire sandy soils solidify.
Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to compared with
Good embodiment describes the invention in detail, those skilled in the art should understand that, it can be to skill of the invention
Art scheme is modified or replaced equivalently, and without departing from the objective and range of technical solution of the present invention, should all be covered at this
In the scope of the claims of invention.
Claims (3)
1. sand slope method for protecting support, this method comprises the following steps:
1) concrete pile is constructed: set gradually multiple rows of concrete pile (1) from bottom to top along sand slope, the specific steps are；
1.1) it is bored from bottom to top along sand slope base pile hole (2), the base pile hole (2) puts in rock from the sandy soils (3) on surface layer
(4) 1.5~2 meters of layer；The base pile hole (2) is interior low outer high angling hole, and the tilt angle of base pile hole (2) is 2~3 °；
1.2) steel reinforcement cage (5) is mounted in base pile hole (2), is then poured concrete；
2) longitudinal reinforcement (6) and transverse steel (7), the longitudinal direction are laid with according to 1.5 meters of spacing in the extexine of sand slope
Reinforcing bar (6) and transverse steel (7) are embedded in sandy soils (3) and steel mesh, the reinforcing bar are welded and formed in crosspoint
Reinforcement welding on net and adjacent concrete pile；
3) it is first gradient in the range of upward 1.8~2 meters of side slope bottom, the sandy soils (3) of first gradient is solidified:
3.1) several water injection holes are uniformly bored on the sandy soils of first gradient (3), the depth of water injection hole is the thickness of sandy soils (3)
Degree, and injector (8) are installed in water injection hole, 0.5 meter is separated by between adjacent injector (8), the injector (8) includes water filling
Pipe I (9) and the geotextiles I (10) being wrapped on water injection pipe I (9) are uniformly arranged multiple apopores I (11) on water injection pipe I (9),
It is provided with air hose (12) in the water injection pipe I (9), is uniformly arranged multiple gas ports (13) on the air hose (12)；
3.2) on the sandy soils of first gradient (3) be laid with geotextiles II (14), and geotextiles II (14) be laid with outside one layer it is close
Pressure plate (16), the geotextiles II (14), sealing film (15) and pressurization is arranged in sealing film (15) in sealing film (15) outside
Plate (16) passes through corresponding concrete pile (1), and sealing film (15) and concrete pile (1) sealing cooperate, the concrete
The pressure device (17) to pressure plate (16) pressurization is provided on foundation pile (1), the water injection pipe I (9) and air hose (12) stretch out soil
Work cloth II (14), sealing film (15) and pressure plate (16) pass through the portion of sealing film (15) with sealing ring to water injection pipe I (9)
Position is sealed, and so that the sandy soils (3) of first gradient is in sealing state by pressure plate (16)；The air hose (12) is located at
The one end of sandy soils (3) outside is bent from the one side wall of water injection pipe I (9) to be stretched out, and air hose (12) stretches out the tube wall of water injection pipe I (9)
Part seals；
3.3) the top of pressure plate (16) and be close to sandy soils side be horizontally disposed with a water injection pipe II (18), the water filling
The side that pipe II (18) is close to sandy soils is uniformly arranged multiple apopores II；
3.4) air hose is connect by hose with air pump, by water injection pipe I (9) and water injection pipe II (18) to the sand of first gradient
Bacterium is injected in soil layer (3), waits bacteriums will be until sandy soils (3) wetting thoroughly of entire first gradient；
3.5) by water injection pipe I (9) and water injection pipe II (18) into the sandy soils (3) of first gradient injection chemical solution, make the
The sandy soils (3) of one gradient are immersed in chemical solution, are passed through air into air hose (12) by air pump, are passed through gas port
(13) air is imported into chemical solution to increase oxygen composition, can achievees the purpose that improve catalytic；In the first ladder
After the sandy soils (3) of degree impregnate 1.5-2.5 hours, first stage pressurization, pressure are implemented to pressure plate (16) by pressure device (17)
Power is 0.5 Kilogram Force Per Square Centimeter, and pressing time first stage is 1.5-2 hours, then by pressure device (17) to pressure plate
(16) implement second stage pressurization, pressure is 0.7 Kilogram Force Per Square Centimeter, and second stage pressing time is 2-2.2 hours, then
Phase III pressurization is implemented to pressure plate (16) by pressure device (17), pressure is 0.8 Kilogram Force Per Square Centimeter, phase III
The pressure is always maintained at after pressurization；The chemical solution is by urea, NH4 +And Ca2+The nutrition of form in water is added to after mixing
Liquid；
3.6) after reacting 10 days, sandy soils (3) solidification of first gradient is finished, and removes pressure device (17), pressure plate (16), sealing
Film (15), geotextiles II (14) and water injection pipe II (18)；
4) sandy soils (3) solidification of the second gradient, the sandy soils of the second gradient are carried out in the top of the sandy soils of first gradient (3)
(3) height is 3.5 meters, is consolidated according to the curing mode of the sandy soils (3) of first gradient to the sandy soils (3) of the second gradient
Change；
5) step 4) is repeated, until sandy soils (3) solidification of entire side slope finishes.
2. sand slope method for protecting support according to claim 1, it is characterised in that: the bacterium selects Pasteur's gemma bar
Bacterium.
3. sand slope method for protecting support according to claim 1, it is characterised in that: the pressure device (17) includes pressure bar
(19), one end of hydraulic cylinder (20) and pressure sensor (21), pressure bar (19) is fixedly connected on corresponding coagulation soil matrix
In stake (1), the cylinder body of hydraulic cylinder (20) is fixed on the other end of pressure bar (19), and the piston rod of the hydraulic cylinder (20) stretches to
Pressure plate (16), the lower part of piston rod of pressure sensor (21) setting in hydraulic cylinder (20) are simultaneously right with pressure plate (16)
It answers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910120262.4A CN109680696B (en) | 2019-02-18 | 2019-02-18 | Sand slope supporting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910120262.4A CN109680696B (en) | 2019-02-18 | 2019-02-18 | Sand slope supporting method |
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| Publication Number | Publication Date |
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| CN109680696A true CN109680696A (en) | 2019-04-26 |
| CN109680696B CN109680696B (en) | 2020-08-04 |
Family
ID=66196590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201910120262.4A Expired - Fee Related CN109680696B (en) | 2019-02-18 | 2019-02-18 | Sand slope supporting method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112544292A (en) * | 2020-12-08 | 2021-03-26 | 铁汉山艺环境建设有限公司 | Self-eliminating type spiral root-expanding soil-fixing method for preventing water and soil loss of side slope |
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| CN112544292B (en) * | 2020-12-08 | 2022-06-21 | 铁汉山艺环境建设有限公司 | Self-eliminating type spiral root-expanding soil-fixing method for preventing water and soil loss of side slope |
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| CN109680696B (en) | 2020-08-04 |
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