CN203174588U - Device capable of forming high-strength jet grouting piles in silt layer - Google Patents
Device capable of forming high-strength jet grouting piles in silt layer Download PDFInfo
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- CN203174588U CN203174588U CN 201320074142 CN201320074142U CN203174588U CN 203174588 U CN203174588 U CN 203174588U CN 201320074142 CN201320074142 CN 201320074142 CN 201320074142 U CN201320074142 U CN 201320074142U CN 203174588 U CN203174588 U CN 203174588U
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Abstract
The utility model discloses a device capable of forming high-strength jet grouting piles in a silt layer in order to provide a device which can save consumption of the raw material of cement substantially and meanwhile reduce electric power consumption in construction work. The device capable of forming the high-strength jet grouting piles in the silt layer is characterized by comprising a sprayer, a clear water nozzle connected with a clear water pump is arranged on the side wall of the upper portion of the sprayer, a cement paste nozzle connected with a cement paste pump is arranged on the side wall of the lower portion of the sprayer, the spraying direction of the clear water nozzle is opposite to that of the cement paste nozzle, and the perpendicular distance between the clear water nozzle and the cement paste nozzle is 0.5-1.5 times the diameter of each jet grouting pile. The device capable of forming the high-strength jet grouting piles in the silt layer belongs to the technical field of building construction.
Description
Technical field
The utility model discloses a kind of device that forms high-strength rotary churning pile, specifically, is a kind of device that can form high-strength rotary churning pile in mud, belongs to technical field of building construction.
Background technology
High-pressure rotary-spray is introduced from Japan the technical seventies in century, now be that a kind of general flabbiness ground strengthened and seepage ground cuts the means of oozing sealing at home, domestic relatively more current high pressure jet grouting standard has " Hydraulic and Hydro-Power Engineering High Pressure Jet Grouting Technique standard " (DL/T 5200-2004).But conventional high-pressure rotary-spray all is by water under high pressure mud or the powerful cutting soil of water under high pressure, and cement paste initiatively or passive mixing with the soil body and be formed with certain intensity or the cement-soil induration of certain density is arranged.In the process that this cement paste mixes, because cement paste or the aqueous medium injection in the soil body, make the aperture usually have a large amount of slurries that returns to overflow ground, returning the cement composition that high level is arranged in the slurry is discharged on the ground simultaneously, cause the waste of cement raw material, not only increased the construction costs of rotary churning pile, and polluted environment, because cement is the highly energy-consuming industry, increased carbon emission especially again.Particularly in the mud of rich water, because the stratum is in full water state, the slurry that returns that the material that has poured into how many volumes often in the stratum just has same volume returns out ground, the utilization rate of cement is lower, in any case even have some triple pipe rotary spray construction teams to do the not situation appearance of pile in mud.
The utility model content
At the problems referred to above, the utility model discloses a kind of device of the high-pressure rotary-spray pile driving construction that carries out in mud, and this device can significantly be saved the raw-material consumption of cement, also reduces the power consumption in the construction works simultaneously; Perhaps rotary churning pile pile body compressive strength significantly improves under the situation of equal cement consumption.
For solving the problems of the technologies described above, the technical scheme that provides of the present utility model is such: this can form the device of high-strength rotary churning pile in mud, comprise shower nozzle, described shower nozzle upper portion side wall is provided with the water nozzle that connects clarified water pump, be provided with the cement paste nozzle that connects cement slurrypump at the shower nozzle lower sides, the injection direction of described water nozzle and cement paste nozzle is opposite, and the vertical distance of water nozzle and cement paste nozzle is 0.5～1.5 times of rotary churning pile stake footpath.
The above-mentioned device that can in mud, form high-strength rotary churning pile, described shower nozzle is provided with a water nozzle and a cement paste nozzle, and the jet axis of the jet axis of water nozzle and cement paste nozzle is positioned at same plane.
The above-mentioned device that can in mud, form high-strength rotary churning pile, described shower nozzle is provided with two water nozzles and a cement paste nozzle, the jet axis of two water nozzles is positioned at the same plane perpendicular to shower nozzle, angle is less than 60 degree between the jet axis of two water nozzles, and the angular bisector of the injection direction of cement paste nozzle and two water nozzle angles is positioned at same plane.
Further, the above-mentioned device that can in mud, form high-strength rotary churning pile, the diameter of described water nozzle is 1～2.5mm, the diameter of cement paste nozzle is 3.5～8mm.
Compared with prior art, the utlity model has the advantage of in mud, significantly saving cement raw material.In order to increase comparativity, no matter be to adopt the rotary churning pile of the utility model construction or dual pipe or triple pipe spiral spraying pile all according to 1 meter (for convenient calculating adopted 10 decimeters) stake footpath, rotary churning pile induration rate of specific gravity is pressed 1.8t/m
3(for convenient calculating adopted every cubic decimeter of kilogram), 1.5 kilograms/cubic decimeter of cement paste proportions, cement paste unit interval injection rate 60L/Min, the pile body design contains 15% cement mixed ratio and compares.
1) cement consumption of employing the utility model worker method construction rotary churning pile
The water slurry double pipe shower nozzle that the utility model adopts is when jet grouting, and water under high pressure on top sprays left, and cement paste sprays to the right in bottom, and top high-pressure water jet is design stake length directly with distance between the following cement paste jet.The residing environment the right and left of shower nozzle is original state mud, following is unconsolidated churning pile body still, and the top also is the silt soil stratum of original state, but the boring that leaves about Φ 130mm size communicates with ground.According to the fluid moving law, high-pressure water jet and cement paste jet should be made circular motion with an approximate circle, and water nozzle overlaps with slurry mouth mid point on the move round heart and the spray boom, and its radius is the radius of rotary churning pile.Because the pressure of water under high pressure is much larger than the pressure of cement paste, the fluid energy source of pretending circular motion mainly contains high-pressure water jet to be provided, cement paste sprays to the right and is actually the lower right corner of cement paste having been delivered to circle, and the proportion of the mud slurry that forms after greater than the water under high pressure cutting soil of the proportion of cement paste, so most cement pastes are kept in the pile body of rotary churning pile, with the cement composition that returns slurry arrival ground seldom, according to returning out the mensuration of cement composition in the slurries, the cement more than 95% has been stayed in the rotary churning pile pile body.
Calculate accordingly, every meter rotary churning pile consumes cement amount (W, unit kilogram) and is:
W=r
2π lGb ÷ η=52*3.14*10*1.8*15% ÷ 95%=223 kilogram (formula 1)
Wherein: r-design rotary churning pile radius, unit decimetre
π-3.14
L-rotary churning pile length is all got 1 meter namely 10 decimeters here
G-cement-soil induration proportion, the rotary churning pile proportion that the mud stratum forms is generally 1.8 kilograms/cubic decimeter
The b-cement mixed ratio is 15%
η-cement utilization rate can reach 95% in this worker method
2) adopt common double pipe high-pressure rotary jet grouting pile cement consumption
Common double pipe high-pressure rotary-spray is that water under high pressure mud sprays cutting soil with high pressure from the slurry nozzle, compressed air then is to surround the cement paste jet with ring-type to increase stirring to the soil body, and churning spray tool rotate the cylindric cement-soil induration of limit lifting formation while spraying.The mechanism that the soil body is stirred in its cutting is that cement paste directly acts on the soil body, because the full water-based of mud, can not hold more foreign substance, that is to say that the cement paste that pours into how many volumes just has the useless slurry of how many volumes to return out ground, cement factor and the cement factor in the rotary churning pile in the useless slurry are also very approaching.Calculating is to be in full water state based on mud, and the liquid that pours into how many volumes in the hole when that is to say high the spray just has the mixed serum of how many volumes to return out from the aperture.
Double pipe rotary churning pile cement utilization rate can be calculated by rotary churning pile volume ÷ (grout volume of rotary churning pile volume+this section of injection):
η=(r
2π l) ÷ [r
2π l+ (l/v) L] (formula 2)
Wherein L-cement paste unit input quantity is 60 liters/minute herein
V-churning hoisting velocity, decimetre/minute
The meaning of other letter representative is the same.
Abbreviation calculates
η=157v ÷ (157v+120) (formula 3)
Definition according to whole cement injection rates * actual cement consumption of cement utilization rate=rotary churning pile can be write out
(l/v)Ld÷2×η=?r
2πlGb
Wherein d-cement paste proportion restrains/cubic centimetre
The meaning of other letter representative is the same.
Abbreviation calculates
η=0.47v (formula 4)
Even solution formula 3 and formula 4 get
η=0.47×1.3=61%
Calculate according to formula 1, double pipe rotary churning pile cement consumption is 212 ÷ 61%=348 kilograms
Substance pipe high-pressure rotary-spray does not generally reach 1 meter stake footpath, can reach as above 1 meter stake footpath in theory when spray pressure is enough big yet, and its theoretical cement consumption needs more than 348 kilograms equally.
3) adopt common triple-pipe high pressure jet grouting cement consumption
Triple-pipe high pressure jet grouting is that water under high pressure is with high pressure injection cutting soil; compressed air surrounds the coaxial ejection of high-pressure water jet with ring-type; play the protection high-pressure water jet and increase the stir purpose of degree of the soil body; cement paste then is to be blended in the soil body with high-pressure water jet along the negative pressure that high-pressure water jet forms, and jet rod rotates the limit and promotes formation cement-soil induration while spraying.Same full water-based owing to the mud stratum, the liquid that is injected into underground how many volumes just has the slurry that returns of how many volumes to return out ground, and because triple pipe has a large amount of water and cement paste to be circulated into simultaneously in the stratum simultaneously, will have more to return to starch and flow out ground.
Triple pipe spiral spraying pile cement utilization rate can be calculated by rotary churning pile volume ÷ (volume of the clear water of the grout volume of rotary churning pile volume+this section of injection+this section of injection):
η=（r
2πl）÷[r
2πl+(l/v)×（L+Q）]
Q-water under high pressure flow wherein, the general high pressure clarified water pump that uses fixedly pushing quantity is 75 liters/minute
The meaning of other letter representative is the same.
Abbreviation calculates
η=157v ÷ (157v+230) (formula 5)
Definition according to whole cement injection rates * actual cement consumption of cement utilization rate=rotary churning pile can be write out
(l/v)Ld÷2×η=?r
2πlGb
The meaning of its letter representative is the same.
Abbreviation calculates
η=0.47v (formula 4)
Even solution formula 5 and formula 4 get
η=0.47×0.66=31%
Calculate according to formula 1, the triple pipe spiral spraying pile cement consumption is 212 ÷ 31%=684 kilograms
4) adopt the utility model worker method to compare with adopting common churning method, the ratio that cement calculates use amount is 223:348:684, and the saving amplitude of cement is very big.
With same cement consumption, form onesize pile body behind the jet grouting, the strength of the mixing pile that obvious the utility model worker method forms in mud significantly improves, efficiently solve at work progress because the unit interval grouting amount of triple pipe when construction cement paste is too small, in any case the problem that jet rod all can not pile occurs promoting slowly.
The technical scheme that the utility model provides, the energy of waste was minimum when energy efficient, injection stream were sprayed along the direction of a circle, and the energy that this method of rotary churning pile in the same stake footpath of constructing out in other words needs is minimum, thereby has energy-conservation effect; The utility model is applicable to the mud stratum, but can promote the use of in all stratum of mainly being made up of less than the fine particle of 0.5mm particle diameter applied range.
Description of drawings
Fig. 1 is the structural representation of a kind of device of the utility model;
Fig. 2 is the vertical view of Fig. 1 device;
Fig. 3 is the structural representation of the another kind of device of the utility model;
Fig. 4 is the vertical view of Fig. 3 device;
Wherein: shower nozzle 1; Water nozzle 2; Cement paste nozzle 3.
The specific embodiment
Below in conjunction with the specific embodiment; claim of the present utility model is described in further detail; but any restriction of the present utility model in pairs inadequately; the modification of the limited number of time that anyone makes in the utility model claim scope is still in claim protection domain of the present utility model.
Consult Fig. 1 and Fig. 2, a kind of device that can in mud, form high-strength rotary churning pile of the present utility model, this device comprises shower nozzle 1, it is that the preferred diameter of 1～2.5mm(is 2.0mm that described shower nozzle 1 upper portion side wall is provided with a diameter that connects clarified water pump) water nozzle 2, be provided with the cement paste nozzle 3 that connects a cement slurrypump at shower nozzle 1 lower sides, the diameter of cement paste nozzle 3 is 3.5～8mm, preferred 5mm, the injection direction of described water nozzle 2 and cement paste nozzle 3 is opposite, and jet axis is positioned at same plane, water nozzle 2 is 0.5～1.5 times of (preferred 1 times) rotary churning pile stake footpath with the vertical distance of cement paste nozzle 3, and the size in stake footpath is according to the actual needs design of building.Because the injection direction of clear water jet and cement paste jet is opposite, expulsion pressure is different, so can form a fluid vortex circle, cement paste at the influence basin postprecipitation that breaks away from this fluid vortex circle under the eddy current circle, upwards promote rotary nozzle gradually, the cement paste that is deposited under the eddy current circle can be piled up the high-strength rotary churning pile of formation.
Consult Fig. 3 and Fig. 4, another kind of the present utility model can form the device of high-strength rotary churning pile in mud, this device comprises shower nozzle 1, described shower nozzle 1 is provided with two water nozzles 2 and a cement paste nozzle 3, the equal diameters of two water nozzles 2, be 1.5mm, the jet axis of two water nozzles 2 is positioned at same plane, angle is less than 60 degree between the jet axis, the diameter of cement paste nozzle is 8mm, and the angular bisector of the injection direction of cement paste nozzle 3 and two water nozzle 2 angles is positioned at same plane.Water nozzle 2 is 0.5～1.5 times of (preferred 1.5 times) rotary churning pile stake footpath with the vertical distance of cement paste nozzle 3, and the size in stake footpath is according to the actual needs design of building.Because the injection direction of clear water jet and cement paste jet is opposite, expulsion pressure is different, so can form a fluid vortex circle, cement paste at the influence basin postprecipitation that breaks away from this fluid vortex circle under the eddy current circle, rotate up the lifting shower nozzle gradually, the cement paste that is deposited under the eddy current circle can be piled up the high-strength rotary churning pile of formation.
Use this device when concrete construction, comprise the steps that (1) is lowered to shower nozzle after treating pile position pore-forming; (2) starting high pressure clarified water pump and slush pump makes shower nozzle eject clear water jet and cement paste jet simultaneously in mud.Wherein, the diameter of water nozzle is 2.5mm, and the clear water expulsion pressure is 30MPa; The cement nozzle diameter is 5mm, and the cement paste expulsion pressure is 7Mpa.And the clear water jet is positioned at cement paste jet top, vertical distance between clear water jet and the cement paste jet is 1 times of rotary churning pile stake footpath, the injection direction of clear water jet and cement paste jet is opposite and can form a fluid vortex circle, the below of cement paste jet position place fluid vortex circle, cement grout are precipitated downwards breaks away from the influence basin of this fluid vortex circle under effect of inertia after; (3) start high spray booth car, the hoisting velocity of pressing 10cm/Min, the rotary speed of 8 commentaries on classics/Min are sprayed while rotating and are promoted shower nozzle, and high-pressure water jet constantly cuts the mud soil body, and cement paste is constantly piled up in the bottom filling and formed high-strength rotary churning pile.
Claims (4)
1. an energy forms the device of high-strength rotary churning pile in mud, comprise shower nozzle (1), it is characterized in that, described shower nozzle (1) upper portion side wall is provided with the water nozzle (2) that connects clarified water pump, be provided with the cement paste nozzle (3) that connects cement slurrypump at shower nozzle (1) lower sides, the injection direction of described water nozzle (2) and cement paste nozzle (3) is opposite, and water nozzle (2) is 0.5～1.5 times of rotary churning pile stake footpath with the vertical distance of cement paste nozzle (3).
2. the device that can in mud, form high-strength rotary churning pile according to claim 1, it is characterized in that, described shower nozzle (1) is provided with a water nozzle (2) and a cement paste nozzle (3), and the jet axis of the jet axis of water nozzle (2) and cement paste nozzle (3) is positioned at same plane.
3. the device that can in mud, form high-strength rotary churning pile according to claim 1, it is characterized in that, described shower nozzle (1) is provided with two water nozzles (2) and a cement paste nozzle (3), the jet axis of two water nozzles (2) is perpendicular to shower nozzle and be positioned at same plane, angle is less than 60 degree between the jet axis of two water nozzles (2), and the angular bisector of the injection direction of cement paste nozzle (3) and two water nozzles (2) angle is positioned at same plane.
4. according to claim 1 or the 2 or 3 described devices that can form high-strength rotary churning pile in mud, it is characterized in that the diameter of described water nozzle (2) is 1～2.5mm, the diameter of cement paste nozzle (3) is 3.5～8mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320074142 CN203174588U (en) | 2013-02-17 | 2013-02-17 | Device capable of forming high-strength jet grouting piles in silt layer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320074142 CN203174588U (en) | 2013-02-17 | 2013-02-17 | Device capable of forming high-strength jet grouting piles in silt layer |
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| CN203174588U true CN203174588U (en) | 2013-09-04 |
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| CN 201320074142 Expired - Fee Related CN203174588U (en) | 2013-02-17 | 2013-02-17 | Device capable of forming high-strength jet grouting piles in silt layer |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108914938A (en) * | 2018-07-03 | 2018-11-30 | 上海勇创建设发展有限公司 | A kind of controlled diameter high pressure jet grouting construction method |
| CN108914939A (en) * | 2018-07-03 | 2018-11-30 | 上海勇创建设发展有限公司 | A kind of major diameter ultra-deep high pressure jet grouting construction method |
| CN108914940A (en) * | 2018-07-03 | 2018-11-30 | 上海勇创建设发展有限公司 | A kind of multiple superhigh pressure jetting grouting construction method of super-large diameter |
| CN110924385A (en) * | 2019-12-02 | 2020-03-27 | 韶关市第一建筑工程有限公司 | High-pressure jet grouting pile construction process |
| CN115450567A (en) * | 2022-09-28 | 2022-12-09 | 北京中岩大地科技股份有限公司 | Horizontal telescopic rotary spraying drill rod and construction method thereof |
-
2013
- 2013-02-17 CN CN 201320074142 patent/CN203174588U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108914938A (en) * | 2018-07-03 | 2018-11-30 | 上海勇创建设发展有限公司 | A kind of controlled diameter high pressure jet grouting construction method |
| CN108914939A (en) * | 2018-07-03 | 2018-11-30 | 上海勇创建设发展有限公司 | A kind of major diameter ultra-deep high pressure jet grouting construction method |
| CN108914940A (en) * | 2018-07-03 | 2018-11-30 | 上海勇创建设发展有限公司 | A kind of multiple superhigh pressure jetting grouting construction method of super-large diameter |
| CN110924385A (en) * | 2019-12-02 | 2020-03-27 | 韶关市第一建筑工程有限公司 | High-pressure jet grouting pile construction process |
| CN115450567A (en) * | 2022-09-28 | 2022-12-09 | 北京中岩大地科技股份有限公司 | Horizontal telescopic rotary spraying drill rod and construction method thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130904 Termination date: 20140217 |