CN107246010A - Karst area Percussion Piles construction - Google Patents
Karst area Percussion Piles construction Download PDFInfo
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- CN107246010A CN107246010A CN201710315053.6A CN201710315053A CN107246010A CN 107246010 A CN107246010 A CN 107246010A CN 201710315053 A CN201710315053 A CN 201710315053A CN 107246010 A CN107246010 A CN 107246010A
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- casing
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/34—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/52—Ferrous alloys, e.g. steel alloys containing chromium with nickel with cobalt
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D13/00—Accessories for placing or removing piles or bulkheads, e.g. noise attenuating chambers
- E02D13/04—Guide devices; Guide frames
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
- E02D7/02—Placing by driving
- E02D7/06—Power-driven drivers
- E02D7/08—Drop drivers with free-falling hammer
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
- E02D7/02—Placing by driving
- E02D7/06—Power-driven drivers
- E02D7/12—Drivers with explosion chambers
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/40—Miscellaneous comprising stabilising elements
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
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- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
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- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The present invention relates to the hole creating technology under karst area and bored concrete pile forming technique field.Purpose, which is to provide, can greatly improve the karst area Percussion Piles construction of Percussion Piles pile quality.Comprise the following steps：A, smooth location, stake position unwrapping wire, digging mud circulatory pool.B, the lower probing in stake position.C, embedded casing, rig are in place.The top of casing side, which is set, sets turnover preventor structure on overfall, rig.During D, slurrying, percussive drilling, percussive drilling when stake holes depth >=4 meter, anti-retaining cover is installed in the upper end of casing, the centrally disposed pilot hole of anti-retaining cover, the steel cable of lifting drill hammer passes through pilot hole.E, pore-forming inspection, first time borehole cleaning.F, the making of steel reinforcement cage, installation.G, installation conduit, second of borehole cleaning.H, pouring underwater concrete.I, taking-up casing.The present invention can greatly improve the pile quality of Percussion Piles, reduce the incidence of the accidents such as bit freezing, the hole that collapses.
Description
Technical field
The present invention relates to the hole creating technology under karst area and bored concrete pile forming technique field, specifically related to karst
Matter Percussion Piles construction.
Background technology
At present in the construction of architectural engineering, in order to improve the stability of building, it is necessary to which support stake is stood on into underground admittedly
In lithosphere, to ensure the firm of building.Therefore it must assure that the depth of stake holes is reached in lithosphere in the formation of stake holes, this
Sample requires the earthward lower punching, and being expressed to unnecessary soil/slurry and rubble during punching of special equipment
The both sides in hole or cleaning are gone out, to continue punching downwards.Punching above-mentioned at present mainly uses weight (also referred to as to impact
Drill bit) pass through punching pile machine（Namely rig）To realize, the operation principle of existing punching pile machine is mainly：Lift weight
To certain altitude then make its it is prominent put after freely land, then Contact -impact face lifts weight again, then dashes forward and put ... and so on
Motion, using impact kinetic energy impact extrusion soil layer or fractured rock pore-forming, part disintegrating slag and mud are squeezed into hole wall, largely turned into
Body refuse, steel reinforcement cage, concrete perfusion pile outside body refuse tap, then will be put down again using slag cylinder or other methods is drawn.
It is the special geomorphology formed under long term of the solublerock in erodible underground water in karst landform, it is existing
There is technology in the work progress of Percussion Piles, because solution cavity is more, crack, breach etc. usually occur in the bottom surface or side of stake holes, lead
Cause the shape and structure of stake holes internal face and bottom surface increasingly complex, weight when being contacted after falling with stake holes bottom surface due to stress pole not
It is horizontal, cause weight that there is great deflection, bounce is serious, on the one hand can not ensure the forming quality of stake holes, on the other hand
The support arm of punching pile machine is also resulted in by huge impact.Simultaneously as being influenceed by solution cavity, to ensure holding for Percussion Piles
Power thickness degree is to improve the stability of Percussion Piles, and the stake holes depth of Percussion Piles is generally larger, and the steel cable for lifting by crane drill hammer is longer,
Lack effective control to steel cable stage casing in the prior art, cause the deflection of drill hammer bigger, often result in bit freezing, greatly
The duration is have impact on, unnecessary workload is also increased.
Simultaneously as bit freezing phenomenon takes place frequently, once the tup of weight clings or blocked by rock or solution cavity by argillic horizon
And can not rise when hammering into shape, because the hoist engine of punching pile machine is still constantly being operated, weight is produced by steel wire rope very big
Pulling force, the pulling force can produce a reaction force for pullling punching pile machine.Although the usual counterweight of the support of punching pile machine is larger,
When bit freezing phenomenon is more serious, the rear end of whole frame can be still pulled upwardly, if now operating personnel can not be anti-in time
It and should stop, will easily cause the accident of translation frame, be on the one hand easily damaged punching pile machine in itself, on the other hand will give operating personnel
Life security bring harm.
The content of the invention
It is an object of the invention to provide the karst area punching pile driving construction that can greatly improve Percussion Piles pile quality
Engineering method.
For achieving the above object, the technical solution adopted in the present invention is：Karst area Percussion Piles construction,
Comprise the following steps：
A, smooth location, stake position unwrapping wire, digging mud circulatory pool；
B, the lower probing in stake position, drilling depth is to enter at least 5 meters of supporting course；
C, embedded casing, rig are in place；The top of the casing side, which is set, sets turnover preventor structure on overfall, the rig；
D, slurrying, percussive drilling, carry out the preparation of mud in mud circulatory pool, and the colloidity of mud should be not less than 96%；
During percussive drilling when stake holes depth >=4 meter, anti-retaining cover, the center of the anti-retaining cover are installed in the upper end of casing
Pilot hole is set, and the steel cable of lifting drill hammer passes through pilot hole；
E, pore-forming inspection, first time borehole cleaning；
F, the making of steel reinforcement cage, installation；
G, installation conduit, second of borehole cleaning；
H, pouring underwater concrete；
I, taking-up casing.
It is preferred that, if the mud face in stake holes during step E percussive drillings occurs in descending at slow speed, stake holes
There is crack, clay is now added into stake holes, improve the denseness of mud, continue downward drill, until mud liquid level in stake holes
Recover normal；
If mud liquid level dramatic decrease in stake holes, to completely hollow, there is solution cavity in stake holes side or lower section, now first will punching
Drill bit proposition is hit, native horsestone is added into stake holes, is rushed and pounded repeatedly using drill hammer, native horsestone is pressed into solution cavity, blocked,
Mud is injected into stake holes, continues downward drill.
It is preferred that, if there is bit freezing phenomenon during step E percussive drillings, first confirm drill hammer it is relatively low one
Side, appropriate explosive is placed in a relatively low side-lower, is implemented to ignite, is lifted until by drill hammer, continues downward drill.
It is preferred that, the turnover preventor structure is located in the support of rig, and the turnover preventor structure includes setting along support length direction
Optical transmitting set and optical receiver, the light transmitting are correspondingly arranged on the sealed long box body put, the inwall at the long box body two ends
The direction of the launch of device is consistent with the length direction of long box body；Inside when water filling and long box body are in horizontality in the long box body
Water surface elevation be slightly below optical transmitting set and optical receiver；Be additionally provided with long box body control hoist for driller switch and with light
The control chip that receiver is electrically connected with, when the optical receiver does not receive optical signal, the action of control chip controlling switch makes
Hoist engine shuts down.
It is preferred that, the cross section of the long box body is in isosceles trapezoid.
It is preferred that, the casing includes cylinder and is arranged on the fin of a ring shape of cylinder upper end outer rim；The protection
Capping is made up of the lid of two pieces of semicirculars in shape, and the lid includes frame and the protecting wire net being arranged in frame；The frame is straight
Recess on the centrally disposed semicircular recess on side, two lid frames collectively forms the pilot hole of steel cable；The frame arc side
Lower edge the neck that is engaged with fin is set；Otic placode is set respectively on two lid and two lids are by being located on otic placode
Bolt be connected with each other.
It is preferred that, the drill bit of the casing, anti-retaining cover and rig is made of alloy material, and the alloy material is by such as
Lower parts by weight composition：120 parts of iron；8.5 parts of chromium；20 parts of nickel；5 parts of silicon；Cobalt 2；0.8 part of iridium；0.5 part of titanium；0.5 part of niobium；Scandium 0.3
Part；0.5 part of tellurium；0.8 part of beryllium；0.1 part of strontium；0.8 part of caesium.
It is of the invention compared with existing Percussion Piles construction, stake position determine after to each stake under carry out specific aim
Secondary probing, drilling depth gos deep at least 5 meters of supporting course, is easy to engineering staff to be apparent from real-time geological state, determination
The supporting course at stake end, it is ensured that Percussion Piles are safe and reliable.Meanwhile, the present invention is using the anti-book jacket to steel cable with guide effect
Lid, when hole depth is larger, carries out guiding control to the stage casing of steel cable using the pilot hole on anti-retaining cover, keeps steel cable and stake holes
The small degree of error at center, so as to reduce the circular runout and skew of steel cable, and then is effectively controlled the deflection of drill hammer
Amount, improves the forming quality of stake holes, reduces bit freezing, the risk that the accident such as the hole that collapses occurs.In addition, steel cable with pilot hole
A part of power can be transferred to anti-retaining cover by hole wall during contacting, then be transferred to casing by anti-retaining cover, will by casing
Power is uniformly dispersed to the soil of surrounding, greatly improved the force-bearing situation of rig support arm.In summary, it is of the present invention
Construction be particluarly suitable for being punched out the construction of stake under karst area, the pile matter of Percussion Piles can greatly be improved
Amount, reduces the incidence of the accidents such as bit freezing, the hole that collapses, and improves the service life of rig.
Brief description of the drawings
Fig. 1 is the structural representation of rig；
Fig. 2 is the structural representation of casing；
Fig. 3 is the structural representation before the installation of anti-retaining cover；
Fig. 4 is the structural representation after anti-retaining cover is installed；
Fig. 5 is A-A direction views in Fig. 4；
Fig. 6 is the structural representation of turnover preventor structure；
Fig. 7 is a kind of use state schematic diagram of structure shown in Fig. 6；
Fig. 8 is the stereogram of long box body；
Fig. 9 is the fundamental diagram of turnover preventor structure.
Embodiment
Karst area Percussion Piles construction of the present invention, comprises the following steps：
A, by engineering machinery such as road roller, loading machines construction site is flattened, applied on flattened place
The laying of work sidewalk, is advisable with the walking for meeting construction machinery；Meanwhile, the stake position coordinate given by design drawing carries out unwrapping wire,
Ground on the scene marks out the position of Percussion Piles, is positioned；Ground on the scene digs mud circulatory pool, and the capacity of mud circulatory pool leads to
Often in 200m3 or so, certainly, also suitably it can reduce or increase according to actual conditions.
After the completion of B, the positioning of Percussion Piles, to the specific secondary probing of geological condition below each stake, drilling depth is
Into at least 5 meters of supporting course, to grasp whether stake position has the depth etc. of solution cavity and solution cavity.
C, embedded casing 1, rig are in place.Digged pit in stake position, casing 1 is arranged on stake site, after inspection meets the requirements,
It is with clay and finger stone that the embedded compacting of casing 1 is firm；As shown in Fig. 2 the top of the side of casing 1 sets an overfall 2,
During punching, mud can be filled into stake holes by overfall 2, or mud unnecessary in stake holes is discharged and mud is imported
Starch circulatory pool.The punching of Percussion Piles and excavation should could be carried out for 24 hours after any other casting complete in 5m,
To avoid the solidification for disturbing adjacent pile concrete；On this basis can multimachine operation simultaneously.Rig installation place should flatten compacting in advance,
With sleeper support pedestal 6；After rig is in place, casing 1 is further compacted using the drill hammer of rig.Set on the rig
Turnover preventor structure 3 is put, turnover preventor structure 3 is mainly used in, in rig bit freezing, preventing rig from overturning.
The operation principle of anti-turning mechanism 3 is：When the support 6 of rig is tilted, touch switch is rolled up by switching to rig
Raise machine 10 to be controlled, for example：With reference to shown in Fig. 1 and Fig. 6-9, the turnover preventor structure 3 is located in the support 6 of rig, described anti-
Turning mechanism 3 includes being correspondingly arranged on the sealed long box body 7 set along the length direction of support 6, the inwall at the long two ends of box body 7
Optical transmitting set 8 and optical receiver 9, the direction of the launch of the optical transmitting set 8 are consistent with the length direction of long box body 7.The long box
Water surface elevation inside when water filling and long box body 7 are in horizontality in body 7 is slightly below optical transmitting set 8 and optical receiver 9.Light is sent out
Emitter 8 and optical receiver 9 generally select infrared transmitter and infrared light receiver, as shown in fig. 6, optical transmitting set 8 and light connect
The inner surface that device 9 one is located at the long right-hand member of box body 7 is received, another is located at the inner surface of the long left end of box body 7, and the two height one
Cause.Support 6 is also at horizontality in horizontality duration box body 7, and the light of this light emitters 8 transmitting can be connect by light
Device 9 is received to receive.As shown in fig. 7, when support 6 is in the state tilted, long box body 7 also no longer level, now, long box body 7
Internal water flows to the other end, that is, optical transmitting set 8 by water submerged by one end, then the light that optical transmitting set 8 is launched due to by
To refraction, it will be unable to be received by optical receiver 9.Similarly, even if the position of optical transmitting set 8 and optical receiver 9 is exchanged, when light connects
When receiving device 9 by water submerged, optical signal can not be also received.
As shown in figure 9, being additionally provided with the switch of control hoist for driller 10 on long box body 7 and connecting with the electric wire of optical receiver 9
The control chip connect, when the optical receiver 9 does not receive optical signal, the action of control chip controlling switch stops hoist engine 10
Only operate.As long as that is run-off the straight of support 6, then long box body 7 also can run-off the straight, now optical receiver 9 can not receive
To optical signal, control chip obtains being controlled switch after feedback of the information, hoist engine 10 is shut down by switch, it is to avoid
The problem of rig is overturned, greatly improves the security in work progress.In order to further improve turnover preventor structure
Sensitivity, more preferable way is, as shown in figure 8, the cross section of the long box body 7 is in isosceles trapezoid.So, due to long box
The capacity of the bottom of body 7 is bigger, in its run-off the straight, can more easily ensure water flooding optical transmitting set 8 or optical receiver
9。
D, after rig is in place, carry out slurrying and percussive drilling link, mud carried out first in mud circulatory pool
Preparation, the colloidity of mud should be not less than 96%, and percent sand is less than 4%.In the punching incipient stage, input is certain in casing 1
Clay, the water of amount, are rushed at a slow speed, are impacted voluntarily pulping using drill hammer, are hereafter normally rushed in, circulate mud when rushing in
In mud injection stake holes in pond, mud liquid level is kept to be not less than 0.5m below the top surface of casing 1 all the time.In the process of percussive drilling
In when stake holes depth >=4 meter, anti-retaining cover 4, the centrally disposed pilot hole of the anti-retaining cover 4 are installed in the upper end of casing 1
5, the steel cable of lifting drill hammer passes through pilot hole 5.The effect of described anti-retaining cover 4 mainly has two aspects, on the one hand right
Closed in aperture, it is ensured that the safety of workmen, be on the other hand by being arranged on the pilot hole 5 on anti-retaining cover 4 to steel
Rope is oriented to.
The concrete structure of anti-retaining cover 4 is more, such as anti-retaining cover 4 coordinates in the upper end of casing 1 and the screw thread of casing 1
Lid, a centrally disposed pilot hole 5 for lid, it is of course also possible to be the structure that other are easy to be connected with casing 1.But consider
Many to construction site silt, for the ease of the installation and removal of anti-retaining cover 4, more preferable way is, as shown in Figure 2-5, described
Casing 1 includes cylinder and is arranged on the fin 11 of a ring shape of cylinder upper end outer rim.The anti-retaining cover 4 is in semicircle by two pieces
The lid 12 of shape is constituted, and the lid 12 includes frame 13 and the protecting wire net 14 being arranged in frame 13, and frame 13 and protecting wire net 14 are logical
Often all it is formed from steel.Recess on the centrally disposed semicircular recess of the straight flange of frame 13, the frame 13 of two lid 12 is total to
With the pilot hole 5 for constituting steel cable.The lower edge on the arc side of frame 13 sets the neck 15 being engaged with fin 11.Two lid
Otic placode 16 is set respectively on 12 and two lids 12 are connected with each other by the bolt being located on otic placode 16.When in use, by two pieces
Lid 12 is connected on the fin 11 of the upper end of casing 1, the pilot hole 5 that two recesses are constituted is encased steel cable.Then again
Bolt is locked at otic placode 16, it is very easy to use.
During percussive drilling, mud liquid level in observation stake holes is noted, if under the mud face in stake holes occurs at a slow speed
, then there is crack in stake holes in drop, and clay is now added into stake holes, improves the denseness of mud, continues downward drill, until stake holes
Interior mud build-up of fluid is normal.If mud liquid level dramatic decrease in stake holes, to completely hollow, stake holes side or lower section occur
Solution cavity, now first proposes drill hammer, and native horsestone is added into stake holes, is rushed and pounded repeatedly using drill hammer, native horsestone is squeezed
To solution cavity, blocked, mud is injected into stake holes, continue downward drill.
If if occurring bit freezing phenomenon during percussive drilling, the relatively low side of drill hammer is first confirmed, relatively low one
Side-lower places appropriate explosive, implements to ignite, lifts until by drill hammer, continues downward drill.That is in bit freezing,
Depth to each position of drill bit is measured, and determines the relatively low side of drill bit, after appropriate explosive is wrapped, along drill bit slotted eye
Explosive is placed on the relatively low side-lower of drill bit, then ignited.Then drill bit is shaken, is proposed to continue punching.
E, pore-forming inspection, first time borehole cleaning：After the completion of drilling, anti-retaining cover 4 is removed, pore-forming is checked, examined
Qualified then progress first time borehole cleaning is looked into, it is unqualified, first time borehole cleaning is carried out again after adjustment.
F, the making of steel reinforcement cage, installation, can proceed by the making of steel reinforcement cage, in karst after pore-forming passed examination
It under geology, can not be determined because stake is long before drilling is completed, therefore the steel reinforcement cage of certain length can be made in advance, further according to reality
Need to carry out spreading, then steel reinforcement cage is put into stake holes by suspender.
G, installation conduit, second of borehole cleaning：After steel reinforcement cage installation, the conduit of installation concrete perfusion, and
Second of borehole cleaning is carried out after conduit installation.
H, pouring underwater concrete.
I, taking-up casing 1, during casing 1 is taken out, on the fin 11 that the upper end of casing 1 is enclosed on using cable ferrule, profit
Directly casing 1 is sling with loop wheel machine or rig, fast and easy.
It is of the invention compared with existing Percussion Piles construction, stake position determine after to each stake under carry out specific aim
Secondary probing, drilling depth gos deep at least 5 meters of supporting course, is easy to engineering staff to be apparent from real-time geological state, determination
The supporting course at stake end, it is ensured that Percussion Piles are safe and reliable.Meanwhile, the present invention is using the anti-retaining cover to steel cable with guide effect
4, when hole depth is larger, guiding control is carried out to the stage casing of steel cable using the pilot hole 5 on anti-retaining cover 4, steel cable and stake is kept
The small degree of error at hole center, so as to reduce the circular runout and skew of steel cable, and then is effectively controlled the inclined of drill hammer
Gradient, improves the forming quality of stake holes, reduces bit freezing, the risk that the accident such as the hole that collapses occurs.In addition, steel cable with pilot hole
A part of power can be transferred to anti-retaining cover 4 during 5 hole wall contact, then casing 1 is transferred to by anti-retaining cover 4, passed through
Power is uniformly dispersed to the soil of surrounding by casing 1, greatly improved the force-bearing situation of rig support arm.In summary, originally
The described construction of invention is particluarly suitable for being punched out the construction of stake under karst area, can greatly improve Percussion Piles
Pile quality, reduction bit freezing, the incidence of the accident such as the hole that collapses improve the service life of rig.
Due to casing 1, anti-retaining cover 4 and drill bit long-term field operation, there is higher requirement to its rustless property, therefore,
More preferable way is that the drill bit of the casing, anti-retaining cover and rig is made of alloy material, and the alloy material is by as follows
Parts by weight are constituted：120 parts of iron；8.5 parts of chromium；20 parts of nickel；5 parts of silicon；Cobalt 2；0.8 part of iridium；0.5 part of titanium；0.5 part of niobium；0.3 part of scandium；
0.5 part of tellurium；0.8 part of beryllium；0.1 part of strontium；0.8 part of caesium.
The alloy material is processed into by the following method：
A. iron, chromium, nickel, niobium, scandium, beryllium, tellurium, strontium, caesium etc. are subjected to melting by the parts by weight, furnace temperature is increased to maintenance 1300
DEG C melting 5 minutes, then raises furnace temperature, and titanium, iridium, cobalt, silicon are added when furnace temperature is increased to 1800 DEG C, and last all material melts
It is smelt liquid molten steel.
B. then molten steel made from above-mentioned steps melting is poured, placing temperature is maintained calm 3 minutes in smelting furnace
1800 DEG C, it is cast in 1 point and completes in 30 seconds.
C. after the completion of pouring, cooling is come out of the stove for more than 3 hours.
The corrosion resisting property that the alloy material obtained by above-mentioned steps is arrived by ISO9227 neutral salt spray test standard detection
As a result it is as follows：
| The trade mark | Chromium content | 24h | 48h | 72h |
| The present invention | 5.3% | √ | √ | √ |
| 304 steel | 18.5% | √ | √ | √ |
Comprehensive upper table can be seen that the drill bit of casing 1, anti-retaining cover 4 and rig that alloy material of the present invention is made,
Its corrosion resistance excellent, is difficult to get rusty during long-term use, is especially suitable for field work.The chromium content of the alloy, significantly
Less than traditional 304 stainless steel 18%-20% chromium contents, less than the half of 304 stainless steel chromium contents, but its corrosion resisting property reaches
The level of 304 stainless steels.In traditional understanding, the steel alloy that general chromium content is less than 11% does not possess rustless property, but originally
Alloy is on the basis of chromium content is well below conventional levels, and its rustless property has reached higher level.
Claims (7)
1. karst area Percussion Piles construction, it is characterised in that：Comprise the following steps：
A, smooth location, stake position unwrapping wire, digging mud circulatory pool；
B, the lower probing in stake position, drilling depth is to enter at least 5 meters of supporting course；
C, embedded casing（1）, rig it is in place；The casing（1）The top of side sets overfall（2）, set on the rig
Turnover preventor structure（3）；
D, slurrying, percussive drilling, carry out the preparation of mud in mud circulatory pool, and the colloidity of mud should be not less than 96%；
During percussive drilling when stake holes depth >=4 meter, in casing（1）Upper end anti-retaining cover is installed（4）, the anti-retaining cover
（4）Centrally disposed pilot hole（5）, lifting drill hammer steel cable pass through pilot hole（5）；
E, pore-forming inspection, first time borehole cleaning；
F, the making of steel reinforcement cage, installation；
G, installation conduit, second of borehole cleaning；
H, pouring underwater concrete；
I, taking-up casing（1）.
2. karst area Percussion Piles construction according to claim 1, it is characterised in that：In step E percussive drillings
If during mud face in stake holes occur occurring crack, clay now being added into stake holes in descending at slow speed, stake holes, carry
The denseness of high mud, continues downward drill, until mud build-up of fluid is normal in stake holes；
If mud liquid level dramatic decrease in stake holes, to completely hollow, there is solution cavity in stake holes side or lower section, now first will punching
Drill bit proposition is hit, native horsestone is added into stake holes, is rushed and pounded repeatedly using drill hammer, native horsestone is pressed into solution cavity, blocked,
Mud is injected into stake holes, continues downward drill.
3. karst area Percussion Piles construction according to claim 1, it is characterised in that：In step E percussive drillings
If during there is bit freezing phenomenon, first confirm the relatively low side of drill hammer, appropriate explosive placed in a relatively low side-lower,
Implement to ignite, lift until by drill hammer, continue downward drill.
4. karst area Percussion Piles construction according to claim 1, it is characterised in that：The turnover preventor structure（3）
Positioned at the support of rig（6）It is interior, the turnover preventor structure（3）Including along support（6）The sealed long box body that length direction is set
（7）, the long box body（7）Optical transmitting set is correspondingly arranged on the inwall at two ends（8）And optical receiver（9）, the optical transmitting set（8）
The direction of the launch and long box body（7）Length direction it is consistent；The long box body（7）Interior water filling and long box body（7）In horizontal
Water surface elevation inside during state is slightly below optical transmitting set（8）And optical receiver（9）；Long box body（7）On be additionally provided with control rig
Hoist engine（10）Switch and and optical receiver（9）The control chip of electric connection, the optical receiver（9）Light letter is not received
Number when, control chip controlling switch action, make hoist engine（10）Shut down.
5. karst area Percussion Piles construction according to claim 4, it is characterised in that：The long box body（7）'s
Cross section is in isosceles trapezoid.
6. karst area Percussion Piles construction according to claim 1, it is characterised in that：The casing（1）Including
Cylinder and the fin for the ring shape for being arranged on cylinder upper end outer rim（11）；The anti-retaining cover（4）By two pieces of semicirculars in shape
Lid（12）Constitute, the lid（12）Including frame（13）Be arranged on frame（13）Interior protecting wire net（14）；The frame
（13）The centrally disposed semicircular recess of straight flange, two lids（12）Frame（13）On recess collectively form the pilot hole of steel cable
（5）；The frame（13）The lower edge on arc side is set and fin（11）The neck being engaged（15）；Two lid（12）Upper difference
Otic placode is set（16）And two lids（12）By being located in otic placode（16）On bolt be connected with each other.
7. karst area Percussion Piles construction according to claim 1, it is characterised in that：The casing, anti-book jacket
The drill bit of lid and rig is made of alloy material, and the alloy material consists of the following parts by weight：120 parts of iron；8.5 parts of chromium；
20 parts of nickel；5 parts of silicon；Cobalt 2；0.8 part of iridium；0.5 part of titanium；0.5 part of niobium；0.3 part of scandium；0.5 part of tellurium；0.8 part of beryllium；0.1 part of strontium；Caesium
0.8 part.
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|---|---|---|---|
| CN201710315053.6A CN107246010B (en) | 2017-05-07 | 2017-05-07 | Karst area Percussion Piles construction |
| CN201910488949.3A CN110258558B (en) | 2017-05-07 | 2017-05-07 | Anti-overturning mechanism arranged on drilling machine |
| CN201910488996.8A CN110258559B (en) | 2017-05-07 | 2017-05-07 | Alloy material for drill bit of drilling machine and construction method of punched pile |
Applications Claiming Priority (1)
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| CN201710315053.6A CN107246010B (en) | 2017-05-07 | 2017-05-07 | Karst area Percussion Piles construction |
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| CN201910488996.8A Division CN110258559B (en) | 2017-05-07 | 2017-05-07 | Alloy material for drill bit of drilling machine and construction method of punched pile |
| CN201910488949.3A Division CN110258558B (en) | 2017-05-07 | 2017-05-07 | Anti-overturning mechanism arranged on drilling machine |
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| CN107246010B CN107246010B (en) | 2019-05-10 |
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| CN201910488996.8A Active CN110258559B (en) | 2017-05-07 | 2017-05-07 | Alloy material for drill bit of drilling machine and construction method of punched pile |
| CN201910488949.3A Active CN110258558B (en) | 2017-05-07 | 2017-05-07 | Anti-overturning mechanism arranged on drilling machine |
| CN201710315053.6A Active CN107246010B (en) | 2017-05-07 | 2017-05-07 | Karst area Percussion Piles construction |
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| CN201910488949.3A Active CN110258558B (en) | 2017-05-07 | 2017-05-07 | Anti-overturning mechanism arranged on drilling machine |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN107246010B (en) | 2019-05-10 |
| CN110258559A (en) | 2019-09-20 |
| CN110258558B (en) | 2021-07-06 |
| CN110258559B (en) | 2021-07-06 |
| CN110258558A (en) | 2019-09-20 |
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