CN108005055A - A kind of soft soil foundation burst point cavitation dynamic compaction method and its complexes - Google Patents
A kind of soft soil foundation burst point cavitation dynamic compaction method and its complexes Download PDFInfo
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- CN108005055A CN108005055A CN201711245936.0A CN201711245936A CN108005055A CN 108005055 A CN108005055 A CN 108005055A CN 201711245936 A CN201711245936 A CN 201711245936A CN 108005055 A CN108005055 A CN 108005055A
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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
- E02D3/02—Improving by compacting
- E02D3/046—Improving by compacting by tamping or vibrating, e.g. with auxiliary watering of the soil
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
- F42D1/04—Arrangements for ignition
- F42D1/045—Arrangements for electric ignition
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D3/00—Particular applications of blasting techniques
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Agronomy & Crop Science (AREA)
- Soil Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
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Abstract
The invention discloses a kind of soft soil foundation burst point cavitation dynamic compaction method, continuous cavity is produced inside saturated soft soil using drillhole blasting, in explosion elementary errors time-histories Soft Soil Layer is rammed with the blunt nosed abnormal shape weight bell high-energy of special band, the liquefaction of soil mass produced by explosion makes blunt nosed front end produce vacuole, then under blasting impact and blunt nosed impact double action, cavitation is formed in the saturation soil body, promotes weight energy deeply to run through stratum.Metaling is filled in the cavity to be formed in time ramming, forms dynamic replacement layer, then secondary multiple rammer is carried out with common hammer, rams effect and compacted depth so as to greatly improve, improve construction efficiency.A kind of explosion strong rammer linkage is also disclosed, the above method can be preferably applicable in and explosion strong rammer is carried out to soft soil foundation.
Description
Technical field
The present invention relates to construction engineering technical field, more particularly to a kind of soft soil foundation burst point cavitation dynamic compaction method and its into
Covering device.
Background technology
The southeastern coastal areas are there are a large amount of muddy soft soils, and moisture content is high, and soil property is weak, these soils are built as engineering
It is long in time limit needed for common piling prepressing or vacuum preloading draining concretion method if having to pass through basement process before land used；Increase
Plastic draining board is when drainage channel, and frequent silting, causes draining difficult, effect is also bad.Adopted in foundation in saturated soft soil
It is a kind of common method to carry out basement process with heavy-tamping method, and the construction technology that a kind of efficiency is higher, but this method exists
Main problem be when using larger tamping energy carry out ramming processing when, due in soft soil foundation pore water pressure accumulation, lack
Weary drainage channel, therefore be also easy to produce spongy soil, rams ineffective, and processing depth is limited.Common improved method is that strong rammer is put
Method is changed, broken stone pile or other drainage channels is first carried out by drawing hole displacement, then carries out strong rammer again, can carry to a certain extent
Height rams effect, but speed of application is significantly affected, and reinforcement depth is still limited.
The content of the invention
In view of the deficienciess of the prior art, first purpose of the present invention is to provide a kind of soft soil foundation burst point cavitation
Dynamic compaction method, preferably can be handled muddy soft soil.
The present invention above-mentioned technical purpose technical scheme is that：Include the following steps,
A, blast hole, and the multiple emulsions of placement spaced apart in blast hole are bored in soft soil foundation；
Protection cylinder is installed, protection cylinder is lifted to explosion hole site, makes protection cylinder central alignment blast hole B, makes it certainly
Recast is with sinking underground layer；
C, will be connected with blunt nosed abnormal shape weight bell by tripping gear with crane, and by it is special-shaped weigh bell be hung to blast hole just on
The setting height of side, is provided with the arc groove being recessed inwardly on blunt nosed lower surface；
D, initiator is associated with the unhook control device above special-shaped weight bell, is set and broken off relations according to the height of special-shaped weight bell
The time interval of time and emulsion detonation, time interval is special-shaped weight to be dropped down onto above the ground at 1 meter from sling height
The freely falling body time；Broken off relations to special-shaped weight and the emulsion that detonates when reaching the burst time, form emulsion
Blasting impact preceding, abnormal shape weight bell impact reaches the effect that special-shaped weight bell follows burst point closely all the time, emulsion is using micro- rear
Poor millisecond blasting technology, by elementary errors control linkage initiator detonate, accurately control each emulsion burst time at intervals of
0.1ms, firing order from the top down, to form effectively continuous cavity, promote to produce cavitation effect, abnormal shape weight bell is by detonation
Act on and Cavitation effect is produced in blast hole, effect is rammed in raising；
E, abnormal shape weight bell is hung out out of blast hole, filler is then inserted into blast hole, then extract protection cylinder；
F, common pile monkey is changed, strong rammer operation is again carried out, makes filler closely knit, form compound foundation.
Through the above technical solutions, the surge waveform produced by explosion makes periphery soft into cavity or bad student's cleavage effect
Soil layer pore pressure drastically, produces liquefaction of soil mass phenomenon, and going deep into stratum for strong rammer impact creates condition；When special-shaped weight drop extremely should
During the liquefaction soil layers that burst point is formed, under the double action of blasting impact and blunt nosed impact, the front end of special-shaped weight makes local soil
Body produces " vacuole " phenomenon, and follow-up burst point produces short-delay blasting therewith, and vacuole constantly extends into deep soil, special-shaped weight
Continue injection, achieve the purpose that strong rammer injection.Different from common heavy-tamping method or simple short-delay blasting hole creating technology, this technology with
Explosion is formed premised on soil body cavity and liquefaction of soil, and using with blunt nosed special-shaped heavy tamping Soft Soil Layer, its effect is favourable
In forming vacuole, it is referred to as cavitation, the cavitation percussion formed due to blasting impact and with blunt nosed special-shaped weight, makes
Saturation inside soil body produces obvious reaming and rams effect, and tamping depth, which is significantly increased and advantageously forms, rams hole, first to ram
Effect is hit to greatly improve.Filler is filled in the cavity to be formed in time ramming, dynamic replacement layer can be formed, improves soft soil foundation
Intensity.Due to being filled with filler into blast hole before secondary multiple rammer, drainage channel can be formed in soil layer, in secondary multiple rammer
Shi Buhui produces spongy soil phenomenon, and effect and compacted depth are rammed so as to greatly improved.The operation of explosion strong rammer in protection cylinder and
Sliding support protection is lower to be carried out, and the slungshot that can prevent from producing in blasting process damages, protection cylinder after the completion of explosion strong rammer
Pulled out by vibrating extractor, filler can also shake in withdrawal process close, the effect of strong rammer again in later stage can be improved
Rate.
Preferably, between spacing of the emulsion in blast hole is 2.5~3.5 meters.
Preferably, filler is deposited on the outside of protection cylinder, and filler is loaded explosion by protection cylinder after special-shaped weight bell is extracted
Hole, is then extracted protection cylinder by lash method using vibrations pile-drawing machine.
Preferably, it is characterized in that：When distance of the filler in blast hole away from explosion aperture is 3 when filler is loaded protection cylinder
Stop loading filler at~4 meters, continue to load filler into blast hole after protection cylinder is extracted, until filler is slightly beyond explosion
Aperture, reuses common column hammer and carries out secondary strong rammer to blast hole.
Preferably, four slidingtype A-frames are arranged with the outside of protection cylinder, supplemental protective cylinder keeps stablizing.
Through the above technical solutions, having the beneficial effect that relative to the prior art of the invention：By drillhole blasting in saturation
Continuous cavity is produced inside weak soil, produces cavity and cleavage effect, makes periphery Soft Soil Layer pore pressure accumulation, produces liquefaction of soil mass and show
As stretching into stratum for strong rammer impact and creating conditions；With being rammed with playing the blunt nosed special-shaped weight high energy of shape in explosion elementary errors time-histories
Soft Soil Layer, when the liquefaction coating formed with blunt nosed special-shaped weight drop to the burst point of bullet shape, the blunt nosed front end for playing shape is recessed
Groove can make the local soil body produce cavitation phenomena, and follow-up burst point produces short-delay blasting therewith, and vacuole is constantly into deep soil
Extension, special-shaped weight continue injection, weight energy is stretched into through stratum, substantially increase tamping depth and construction efficiency.
Another object of the present invention with providing a kind of explosion strong rammer linkage, the device can preferably with it is above-mentioned soft
The construction operation of soil base burst point cavitation dynamic compaction method.
A kind of explosion strong rammer linkage, including crane, tripping gear, with blunt nosed special-shaped weight, elementary errors control detonation
Device, unhook control device, are realized by delay switch circuit between unhook control device and elementary errors control initiator and linked, also wrapped
Controller is included, when controller sets the delayed ignition of delay switch circuit automatically by program according to the sling height of special-shaped weight
Between.
Through the above technical solutions, between being more accurately controlled the time that tripping gear takes off thing and emulsion detonation
Every making special-shaped weight lower end fall on Soft Soil Layer in 0.1 millisecond after the Lithium Oxides By Detonation With Emulsion Explosive of the top, make special-shaped weight and quick-fried
The raw impact one of bankruptcy, which is worked, produces cavitation phenomena, and the impact produced with follow-up burst point coordinates, and makes vacuole constantly to life
Extend in into the soil body.
Preferably, it is equipped with arc groove in the middle part of blunt nosed lower end.
Through the above technical solutions, arc groove can produce congregational rate to the shock wave that emulsion produces, make quick-fried
The Soft Soil Layer of liquefaction of soil mass is produced after broken cavitation work is formed under the double action of blasting impact and blunt nosed impact, in saturated soil body
With making the energy of special-shaped weight can deep enough penetratingly layer.
Brief description of the drawings
Fig. 1 is protection cylinder in embodiment one and the structure diagram after the assembling of slidingtype A-frame；
Fig. 2 is a kind of structure diagram of explosion strong rammer linkage in embodiment two；
Fig. 3 is blunt nosed structure diagram.
Reference numeral：1st, protection cylinder；2nd, A-frame；3rd, sliding slot；4th, crane；5th, console；6th, special-shaped weight；7th, break off relations
Device；8th, it is blunt nosed；9th, arc groove.
Embodiment
With specific embodiment, the invention will be further described below in conjunction with the accompanying drawings.
This specific embodiment is only explanation of the invention, it is not limitation of the present invention, people in the art
Member as needed can make the present embodiment the modification of no creative contribution after this specification is read, but as long as at this
All protected in the right of invention be subject to Patent Law.
Embodiment one, a kind of soft soil foundation burst point cavitation dynamic compaction method
A kind of soft soil foundation burst point cavitation dynamic compaction method, comprises the following steps,
A, brill blast hole is applied using small-sized drill in soft soil foundation, the drilling depth of blast hole is according to design reinforcement stratum
Depth is beyond 1 meter of progress operation；In the bottom of blast hole clay back cover after the completion of drilling well, then it is put into blast hole more
A emulsion, the spacing in blast hole between each emulsion are maintained between 3 meters, and in 3 meters of the hole away from blast hole
Place is sealed real with clay.
Protection cylinder 1 is installed, overall round steel casing (as shown in Figure 1) is selected, protection cylinder 1 is lifted to blast hole position B,
Put, make 1 central alignment blast hole of protection cylinder, make it in Gravitative Loads sinking underground layer, and four are set in the outside of protection cylinder 1
A sliding groove, while the A-frame 2 of four slidingtypes is set, 2 rectangular triangle of A-frame, one of A-frame 2
Right-angle side is contacted with ground, another right-angle side is in sliding groove and with can be slided in sliding slot 3, supplemental protective cylinder 1 is protected
It is fixed to keep steady, 3 upper end closed of sliding slot, can be to avoid protection cylinder 1 completely into in blast hole.Protection cylinder 1 places posterior end and sinks
Enter into blast hole, for 1 lower end of protection cylinder still in the emulsion top of the top, 1 upper end of protection cylinder remains in explosion at this time
Outside hole.Protection cylinder 1 in the outside of protection cylinder 1 stacks filler after placing, to be filled in time into blast hole after facilitating explosion, filler
Coarse aggregate, metaling etc. can be selected.Protection cylinder 1 can to avoid in blasting process slungshot damage.
C, it is in elongated cylindrical that special-shaped weight 6 is overall, and the diameter of special-shaped weight 6 is slightly less than protection cylinder 1, special-shaped 6 front end of weight
Blunt nosed the 8 of shape is played with one, the arc groove 9 (as shown in Figure 3) being recessed inwardly is provided with blunt nosed 8 lower surface, will be with blunt
First 8 special-shaped weight bell is connected by tripping gear 7 with crane 4, and special-shaped weight bell is hung to the setting height directly over blast hole；
D, it is initiator is associated with the unhook control device above special-shaped weight bell, set according to the height that special-shaped weight bell is hung to
Surely break off relations time and the time interval of emulsion detonation.Time interval is that special-shaped weight 6 is reached from sling height freely falling body
Time above bottom surface at 1 meter.Then broken off relations by unhook control device to special-shaped weight 6, special-shaped weight 6 exists after unhook
Fall downwards under the action of gravity, then when 1 meter above special-shaped weight 6 reaches bottom surface, by initiator from top to down successively
Detonate the emulsion of blast hole most, and the burst time of emulsion is different while emulsion detonates at intervals of 0.1 millisecond
Type weight 6 enters in blast hole and continues deeply, to make into blast hole the blasting impact that emulsion is formed in preceding, abnormal shape weight
Bell impact reaches the effect that special-shaped weight bell follows burst point closely all the time rear.Elementary errors millisecond blasting skill is used between multiple emulsions
Art, controls initiator to detonate, each emulsion burst time is accurately controlled at intervals of 0.1ms, with saturated soft soil by elementary errors
Effectively continuous cavity is internally formed, weak soil is rammed with 6 high-energy of special-shaped weight for playing shape blunt nosed 8 in explosion elementary errors time-histories
Layer, the liquefaction of soil mass produced by explosion make blunt nosed 8 front end produce vacuole, in blasting impact and the double action of blunt nosed 8 impact
Under promote to produce cavitation inside saturated soft soil, enable the deep enough penetratingly layer of energy of special-shaped weight 6.
E, abnormal shape weight bell is hung out out of blast hole, filler is then inserted into blast hole by protection cylinder 1, forms rubble
Displacement layer, filler can select coarse aggregate, metaling etc..When filler apart from blast hole eat dishes without rice or wine 3~4 meters when stop into blast hole
Fill filler, then protection cylinder 1 is extracted out of blast hole using vibrating extractor, when protection cylinder 1 is extracted due to
The effect of vibration, the filler inserted in blast hole can obtain certain close effect of shaking.
F, filler is continued to fill up into blast hole again after extracting protection cylinder 1, until filler is slightly above protection cylinder 1, Ran Hougeng
Hammer ram is changed, is hammered into shape using common column, secondary multiple rammer is carried out to filler, makes filler closely knit, form compound foundation.Then change to next
Point carries out explosion strong rammer operation, until the ground for completing whole block is strengthened.
Embodiment two, a kind of explosion strong rammer linkage,
As shown in Figures 1 to 3, a kind of explosion strong rammer linkage, including crane 4, tripping gear 7, unhook control device, band
Blunt nosed 8 special-shaped weight 6, elementary errors control initiator, further include controller, and controller, elementary errors control initiator are arranged at control
In platform 5 processed, the linkage between controller control unhook control device and elementary errors control initiator.Controller is by program according to different
The sling height of type weight 6 sets the delayed ignition time automatically, and the time of delayed ignition is to fall from special-shaped weight 6 from sling height
The freely falling body time to above the ground 1 meter.Connected with blunt nosed 8 special-shaped weight 6 by the suspension hook of tripping gear 7 and crane 4
Connect, tripping gear 7 is controlled by unhook control device, and elementary errors control initiator is controlled by the controller detonation.Tripping gear 7 can be adopted
With the automatic coupling shown in Publication No. CN202265818U, unhooking rammer device, by two-way tension oil cylinder therein and loop wheel machine
Hydraulic system be connected, and use solenoid valve to be realized as the action of unhook control device control two-way cylinder and de- hook operation.
First emulsion is connected with elementary errors control initiator during use and is put into blast hole, then by special-shaped weight
6 sling, and by the height input controller of special-shaped weight 6, controller calculates special-shaped weight 6 by built-in program and comes off and detonate
The burst time of device.After the input unhook instruction into controller, controller control electromagnetic valve work, tripping gear 7 breaks off relations, different
Type weight 6 falls, while controller starts timing, and when controller reaches the delayed ignition time of setting, controller control is micro-
Difference control initiator detonates the emulsion of the top in blast hole, and special-shaped weight 6 is in above bottom surface 1 meter at this time
Place, subsequent elementary errors control initiator successively detonate the emulsion in blast hole, firing order from top to bottom, during detonation
Between at intervals of 0.1ms.
The shock wave that explosion produces can form cavity in soil layer or produce cleavage effect, make the Soft Soil Layer pore pressure on periphery
Accumulation, produces liquefaction of soil mass phenomenon, when special-shaped weight 6 enters the liquefaction soil layers of burst point formation, is arranged in blunt nosed 8 lower end
The arc groove 9 in portion makes the local soil body produce cavitation phenomena, and the short-delay blasting that follow-up burst point produces therewith, can make vacuole continuous
Extend into deep soil, special-shaped weight 6 is continued injection, achieve the purpose that strong rammer.
Above-described embodiment is only presently preferred embodiments of the present invention, is not limited the scope of the invention according to this, therefore：It is all according to
The equivalence changes that structure, shape, the principle of the present invention is done, should all be covered by within protection scope of the present invention.
Claims (7)
1. a kind of soft soil foundation burst point cavitation dynamic compaction method, it is characterized in that：Include the following steps,
A, blast hole, and the multiple emulsions of placement spaced apart in blast hole are bored in soft soil foundation；
Protection cylinder is installed, protection cylinder is lifted to explosion hole site, makes protection cylinder central alignment blast hole B, makes it from recast
With in sinking underground layer；
C, it will be connected with blunt nosed abnormal shape weight bell by tripping gear with crane, and abnormal shape weight bell be hung to directly over blast hole
Setting height, is provided with the arc groove being recessed inwardly on blunt nosed lower surface；
D, initiator is associated with the unhook control device above special-shaped weight bell, is broken off relations the time according to the height setting of special-shaped weight bell
With the time interval of emulsion detonation, time interval is special-shaped weight drops down onto the above the ground freedom at 1 meter from sling height
The falling bodies time；Broken off relations to special-shaped weight and the emulsion that detonates when reaching the burst time, form emulsion quick-fried
Preceding, abnormal shape weight bell impact reaches the effect that special-shaped weight bell follows burst point closely all the time, emulsion is using elementary errors milli rear for broken impact
Second blasting technique, controls linkage initiator to detonate by elementary errors, accurately controls each emulsion burst time at intervals of 0.1ms,
Firing order from the top down, to form effectively continuous cavity, promotes to produce cavitation effect, abnormal shape weight bell exists by detonative action
Cavitation effect is produced in blast hole, effect is rammed in raising；
E, abnormal shape weight bell is hung out out of blast hole, filler is then inserted into blast hole, then extract protection cylinder；
F, common pile monkey is changed, strong rammer operation is again carried out, makes filler closely knit, form compound foundation.
2. a kind of soft soil foundation burst point cavitation dynamic compaction method according to claim 1, the emulsion is in blast hole
Spacing be 2.5~3.5 meters between.
3. a kind of soft soil foundation burst point cavitation dynamic compaction method according to claim 2, it is characterized in that：Filler is deposited in protection
Cylinder outside, loads blast hole by protection cylinder by filler after special-shaped weight bell is extracted, then passes through vibrations using vibrations pile-drawing machine
Method extracts protection cylinder.
4. a kind of soft soil foundation burst point cavitation dynamic compaction method according to claim 3, it is characterized in that：Filler is loaded and is protected
Stop loading filler during cylinder when distance of the filler in blast hole away from explosion aperture is 3~4 meters, continue after protection cylinder is extracted
Load filler into blast hole, until it is secondary to blast hole progress strong to reuse common column hammer slightly beyond explosion aperture for filler
Ram.
5. a kind of soft soil foundation burst point cavitation dynamic compaction method according to claim 1, it is characterized in that：It is symmetrical on the outside of protection cylinder
Equipped with four slidingtype A-frames, supplemental protective cylinder keeps stablizing.
6. a kind of explosion strong rammer linkage of soft soil foundation burst point cavitation dynamic compaction method for described in Claims 1 to 5, its
It is characterized in：Including crane, tripping gear, with blunt nosed special-shaped weight, console, elementary errors control detonation is provided with console
Device, unhook control device and linkage, are connected, break off relations dress with blunt nosed special-shaped weight by the suspension hook of tripping gear and crane
Put and controlled what is broken off relations and detonate by linkage with unhook control device by the control of unhook control device, elementary errors control initiator
Time interval.
7. explosion strong rammer linkage according to claim 6, it is characterized in that：Arc groove is equipped with the middle part of blunt nosed lower end.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711245936.0A CN108005055B (en) | 2017-12-01 | 2017-12-01 | A kind of soft soil foundation burst point cavitation dynamic compaction method and its complexes |
| CN201910616976.4A CN110319739B (en) | 2017-12-01 | 2017-12-01 | Blasting dynamic compaction linkage device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711245936.0A CN108005055B (en) | 2017-12-01 | 2017-12-01 | A kind of soft soil foundation burst point cavitation dynamic compaction method and its complexes |
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| CN201910616976.4A Division CN110319739B (en) | 2017-12-01 | 2017-12-01 | Blasting dynamic compaction linkage device |
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| CN201910616976.4A Active CN110319739B (en) | 2017-12-01 | 2017-12-01 | Blasting dynamic compaction linkage device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112982390A (en) * | 2019-12-17 | 2021-06-18 | 上海三航奔腾海洋工程有限公司 | Steel casing of rock-socketed cast-in-place pile capable of not sinking along with punching |
| CN115014999A (en) * | 2022-01-19 | 2022-09-06 | 昆明理工大学 | Testing device and testing method for liquefaction degree of saturated sandy soil under explosive load |
| CN115387320A (en) * | 2022-08-02 | 2022-11-25 | 济南黄河路桥建设集团有限公司 | Rocket hammer column ramming and full ramming combined construction method |
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| CN101089297A (en) * | 2007-06-28 | 2007-12-19 | 刘汉龙 | High vacuum well -points dewatering ground treatment method |
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| CN112982390A (en) * | 2019-12-17 | 2021-06-18 | 上海三航奔腾海洋工程有限公司 | Steel casing of rock-socketed cast-in-place pile capable of not sinking along with punching |
| CN115014999A (en) * | 2022-01-19 | 2022-09-06 | 昆明理工大学 | Testing device and testing method for liquefaction degree of saturated sandy soil under explosive load |
| CN115387320A (en) * | 2022-08-02 | 2022-11-25 | 济南黄河路桥建设集团有限公司 | Rocket hammer column ramming and full ramming combined construction method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110319739B (en) | 2021-10-01 |
| CN110319739A (en) | 2019-10-11 |
| CN108005055B (en) | 2019-08-06 |
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