CN108570983A - The pile base construction method and its casing of non-filler large size solution cavity - Google Patents
The pile base construction method and its casing of non-filler large size solution cavity Download PDFInfo
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- CN108570983A CN108570983A CN201810359219.9A CN201810359219A CN108570983A CN 108570983 A CN108570983 A CN 108570983A CN 201810359219 A CN201810359219 A CN 201810359219A CN 108570983 A CN108570983 A CN 108570983A
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- 239000000945 filler Substances 0.000 title claims abstract description 80
- 238000000034 method Methods 0.000 title claims abstract description 44
- 238000009411 base construction Methods 0.000 title claims abstract description 17
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 83
- 239000010959 steel Substances 0.000 claims abstract description 83
- 238000005266 casting Methods 0.000 claims abstract description 47
- 238000005553 drilling Methods 0.000 claims abstract description 13
- 238000004140 cleaning Methods 0.000 claims abstract description 6
- 230000002787 reinforcement Effects 0.000 claims abstract description 5
- 239000004927 clay Substances 0.000 claims description 13
- 239000002344 surface layer Substances 0.000 claims description 13
- 238000010276 construction Methods 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 6
- 239000004568 cement Substances 0.000 claims description 4
- 230000003014 reinforcing effect Effects 0.000 claims description 4
- 238000004080 punching Methods 0.000 claims description 3
- 239000000284 extract Substances 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 5
- 238000000605 extraction Methods 0.000 description 5
- 239000010410 layer Substances 0.000 description 3
- 238000009417 prefabrication Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 230000011218 segmentation Effects 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/50—Piles comprising both precast concrete portions and concrete portions cast in situ
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/52—Piles composed of separable parts, e.g. telescopic tubes ; Piles composed of segments
- E02D5/523—Piles composed of separable parts, e.g. telescopic tubes ; Piles composed of segments composed of segments
- E02D5/526—Connection means between pile segments
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/66—Mould-pipes or other moulds
- E02D5/665—Mould-pipes or other moulds for making piles
-
- 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
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
The invention discloses the pile base construction methods and its casing of non-filler large size solution cavity, include the following steps：The first step：Prefabricated more piece casing unit buries positioning steel pile casting using concrete for making；Second step：Along positioning steel pile casting internal bore, hole is formed；Third walks：One casing unit is placed on above hole, makes casing unit and positioning steel pile casting centering, forms bottom end casing unit；4th step：A casing unit is put in above the casing unit of bottom end again, makes two casing cell pairs, be connected and fixed；5th step：Two casing units are transferred along hole, gradually up increases and connects casing unit, form casing；6th step：Filler is backfilled in casing, keeps casing bottom end seamless；7th step：Continue drilling inside casing to predetermined depth, borehole cleaning transfers steel reinforcement cage, pours underwater concrete, forms pile foundation.The present invention is not limited by solution cavity height and width, speed of application is fast and expense is few, the integral strength of pile foundation and rigidity are higher.
Description
Technical field
The invention belongs to piling Technology fields, the specially pile base construction method and its shield of non-filler large size solution cavity
Cylinder.
Background technology
The underground of strong karst area is dispersed with the solution cavity of a large amount of all size, and the filler situation in solution cavity is divided into three
Kind：Non-filler (empty solution cavity) is filled up completely and partly fills.In strong karst area, to bridge and architectural engineering pile foundation using brill
When hole (impact) bored concrete pile, under normal circumstances, pile foundation, which encounters different fillings situation and the solution cavity of different height, should take difference
Construction method.
For the large-scale solution cavity of non-filler, generally using slabstone clay filled and steel pile casting two kinds of construction methods of follow-up.
As depicted in figs. 1 and 2, pile foundation 2 sequentially passes through upper layer ground 4, non-filler solution cavity 5 and bottom ground 6, is as shown in Figure 1 piece
Stone clay filled method schematic diagram：First a large amount of 12 fillers of slabstone clay of 5 throwings in non-filler solution cavity, ensure entirely without filling
Object solution cavity altitude range is filled object and fills up, and to which spillage or leak will not occur, is then impacted in filler using block stamp
Pore-forming, finally pouring underwater concrete becomes pile foundation 2.It is illustrated in figure 2 steel pile casting follow-up step：Under 5 in non-filler solution cavity
The steel pile casting 11 more slightly bigger than 2 diameter of pile foundation is put, underwater concrete can be poured in steel pile casting 11 becomes pile foundation 2.
Above-mentioned slabstone clay filled method needs to consume a large amount of slabstone and clay, and construction cost is higher, and solution cavity is higher
It is faster then to fill cost increase, and be difficult to realize for lacking slabstone or clay area, when being more than 5m for solution cavity height, backfill
Amount is too big and is difficult to realize fill.Although the effect of steel pile casting follow-up step is preferable, steel pile casting using steel plate making, cost compared with
Height, constructing operation is loaded down with trivial details, and full seam welding quality requirement is high between steel pile casting, and live seamless welding needs several hours, time-consuming too long,
Casing rigidity is small to easy to produce deformation, these problems cause steel pile casting follow-up step to be difficult to popularize in engineering practice.
Invention content
In view of the above-mentioned problems existing in the prior art, it is not limited by solution cavity height and width the object of the present invention is to provide a kind of
System, speed of application is fast and expense is few, the pile base construction method of the non-filler large size solution cavity of pile foundation integral strength and good rigidity
And its casing.
To achieve the goals above, the technical solution adopted in the present invention is：
The pile base construction method of non-filler large size solution cavity, includes the following steps
The first step：The not exclusively the same casing unit of prefabricated more piece height, casing unit use concrete for making, are constructing
Buried setting position steel pile casting is positioned；
Second step：Surface layer ground inside positioning steel pile casting drills, and forms hole；
Third walks：One casing unit is placed on above above-mentioned hole, casing unit is made and positions the center line of steel pile casting
Alignment forms bottom end casing unit；
4th step：One casing unit is put in the top of bottom end casing unit in third step again, is made in two casing units
Heart line is aligned, and two casing units are connected and fixed；
5th step：The two section casing units that 4th step obtains are transferred along hole, are gradually up increased at the top of casing unit
Adduction connects casing unit, and the method that is located by connecting is with the 4th step, until bottom end casing unit contact non-filler solution cavity bottom surface, stops
Increase casing unit, all casing units form casing；
6th step：Filler is backfilled in the casing of the 5th step, is made seamless between casing bottom end and non-filler solution cavity；
7th step：Continue drilling inside casing to predetermined depth, borehole cleaning transfers steel reinforcement cage, pours underwater concrete, shape
At pile foundation.
Preferably, the hole in second step is not connected to non-filler solution cavity.
It is highly preferred that in second step, it is at a distance from non-filler solution cavity top surface using drill hole of drilling machine to hole bottom
Stop when 0.5m-1.5m and proposes drill bit.I.e. hole bottom is 0.5m-1.5m at a distance from non-filler solution cavity top surface.
Preferably, when hole is not connected to non-filler solution cavity, the 5th step is specifically divided into following three steps：
(a) when hole is not connected to non-filler solution cavity, casing unit is transferred, will be increased above the casing unit of the top
One casing unit, the method that is located by connecting so is repeated with the 4th step, until the bottom of bottom end casing unit touches hole bottom,
And the top of the casing unit of the top is not less than ground；
(b) the surface layer ground on non-filler solution cavity is broken through inside casing unit, until hole connects with non-filler solution cavity
It is logical；
(c) casing unit is transferred, when the bottom of the bottom end casing unit is not in contact with to the bottom surface of non-filler solution cavity, and
When the bottom of the casing unit of the top is not higher than ground, a casing unit, positioning will be increased above the casing unit of the top
Connection method is so repeated with the 4th step, until the bottom of the bottom end casing unit touch the bottom surface of non-filler solution cavity and
The top of the casing unit of the top is not less than ground, forms casing.
Preferably, in above-mentioned steps (b)：The small stroke that 50~80cm is carried out with block stamp impacts the surface layer ground, until
When the distance of hole distance from bottom non-filler solution cavity top surface is 30~70cm, the mud in hole is extracted out, then using 30~
The small stroke of 50cm breaks through the surface layer ground, connected holes and non-filler solution cavity, and block stamp is finally proposed from hole.
Above-mentioned segmentation block stamp impact method can extraction be gone in time by the mud in hole, in this way, under the hole after perforation
The bottom surface of the non-filler solution cavity of the side not no deposit of mud substantially, is conducive to the steady placement of subsequent casing.If utilized
Drilling machine directly penetrates through hole, then falls to the bottom surface of the non-filler solution cavity below hole positioned at the mud of perforated originally
On, mud deposit is formed, this deposit is soft unstable, when casing is placed thereon, casing can be caused unstable.In addition,
Extraction mud can be used for the drilling of bottom ground.
Preferably, the top of the positioning steel pile casting described in the first step is not less than the above 50cm in ground.
Preferably, second step mesoporous hole dia is more than 15~20cm of default Pile Diameter.
Preferably, in third step, two plate I-steel is set up at the top of positioning steel pile casting, casing unit is put with truck crane
It sets on I-steel and is carried out in place with positioning steel pile casting.Ensure casing unit and position the center line alignment of steel pile casting,
This casing unit is bottom end casing unit, that is, is located at a casing unit of casing bottommost.
Preferably, after casing unit and positioning steel pile casting progress centering are in place, in the 5th step, lift two sections using truck crane
Casing unit, I-steel of the extraction pad below the casing unit of bottom end, casing unit is slowly transferred along hole, in decentralization process
The center of casing unit and verticality check at any time.To ensure the center line pair of the center line and pile foundation of two section casing units
Together.
It preferably,, can be at gap position if a small amount of gap occurs in the coupling part of adjacent casing unit in the 4th step
Sticking water-stop glue band prevents mud in hole from leaking.
During adjacent casing unit is connected and fixed and after the completion of being connected and fixed, the center of casing unit need to be checked
And verticality, if range of the deviation beyond setting of the center line of casing unit and positioning steel pile casting center line, is adjusted
Straightening is to meeting the requirements.
It is highly preferred that casing unit must ensure that its center is less than with positioning steel pile casting errors of centration in decentralization process
30mm, the error of perpendicularity are less than 1%.
Preferably, in the 6th step, the filler backfilled in casing is the mixture that slabstone, clay and cement are formed, and is adopted
With block stamp, punching press keeps mixture that the gap between bottom end casing unit and solution cavity bottom surface is completely plugged repeatedly.
It is highly preferred that the mass ratio of slabstone, clay and cement is 10:5:1.
Truck crane cannot loosen, and the bottom of bottom end casing unit must be completely plugged with the gap of solution cavity bottom surface, to prevent
Mud leaks out in hole when lower layer's ground drilling.
Preferably, in the 7th step, mud is poured into casing, then continues to bore inside casing using conventional boring method
Hole after being drilled into predetermined depth, carries out borehole cleaning, transfers steel reinforcement cage, pour underwater concrete, forms pile foundation.
Preferably, casing unit is such as hampered in decentralization process hinders, and gasoline hammer can be used in the casing unit on most
Top, which is beaten, makes it slowly sink.
The casing unit uses prefabrication, and strict control of quality when making, the size of each part error must be less than 5mm.
Casing for non-filler large size solution cavity, which is characterized in that casing includes at least two sequentially connected casings of section
Unit, the casing unit use concrete for making.
Preferably, be furnished with reinforcing bar in the casing, concrete grade must be higher than C40, ensure enough rigidity and intensity with
Exempt from casing to be deformed and crack in use.
Preferably, the internal diameter of the casing unit is equal to default Pile Diameter, and the wall thickness of the casing unit is 8~
10cm often saves casing cell height 1.5m~2.0m.8~10cm of the casing wall thickness, and the steel shield that steel pile casting follow-up step uses
The thickness of cylinder only has 1cm, the rigidity of casing to be far longer than steel pile casting, and work progress not will produce apparent deformation.
The casing further includes junction steel plate, and there are two the junction steel plate is set, adjacent casing unit is using connection bolt
It is attached fixation with junction steel plate.
The height of each casing unit is not exclusively.
Eight bolts hole of the radially even setting in upper end and/or lower end of the casing unit barrel, bolt hole and casing
The distance of unit top or bottom end is 5~15cm.
It is highly preferred that the bolt hole positioned at the casing unit of casing the top is located at 5~15cm of casing unit bottom or more,
It is located at following 5~15cm, the spiral shell of remaining casing unit at the top of casing unit positioned at the bolt hole of the casing unit of casing lowermost end
Keyhole is located at the position away from each 5~15cm in top and bottom.
It is equipped with fossaperturate at the top of the casing unit and/or bottom is equipped with and the matched protruding openning of fossaperturate, the phase
Adjacent casing unit is positioned by fossaperturate and protruding openning clamping.
The bottom for being preferably located at the casing unit of casing the top is equipped with protruding openning, remaining casing unit is top
Portion is equipped with fossaperturate, and bottom is equipped with protruding openning, and so design is convenient for the connection positioning between adjacent casing unit.
Preferably, on each casing unit inner wall at 15~25cm of top radially even pre-buried three semicircle steel
Muscle hanging ring.
Preferably, connection bolt is made of high-strength steel, including countersunk head, screw rod and nut, long 15~17cm, diameter 25
~28mm.
Preferably, junction steel plate uses high-strength steel, junction steel plate length 26cm, width 6cm, both ends be equipped with diameter 28~
The circular hole of 30mm.
Connection bolt and junction steel plate be all made of high strength steel, ensure to deform in casing unit decentralization process and
Fracture.
Compared with prior art, the beneficial effects of the invention are as follows：It is not limited by solution cavity height and width, when solution cavity is larger
When, economic serviceability is far better than slabstone clay filled method；Casing not only can improve stake as the component part of pile foundation
The integral strength and rigidity of base, and pour underwater concrete in casing and will not expand neck and necking down, concrete quality and quantity
It is easy to get control and guarantee；Other welding equipments are not needed, speed of application is fast and expense is few；Casing in factory's serial pre-fabrication,
Construction quality is easy to get guarantee, and price only has the 1/3~1/5 of same specification steel pile casting price.
Description of the drawings
Fig. 1 is slabstone clay filled method schematic diagram；
Fig. 2 is steel pile casting follow-up step schematic diagram；
Fig. 3 is the pile foundation construction scheme schematic diagram of the present invention；
Fig. 4 is the casing unit connection diagram of the present invention；
Fig. 5 is the vertical view of the casing unit of the present invention；
Fig. 6 is the connection bolt drawing of the present invention；
Fig. 7 is the junction steel plate drawing of the present invention.
Reference numeral
1, casing, 2, pile foundation, 3, positioning steel pile casting, 4, surface layer ground, 5, non-filler solution cavity, 6, bottom ground, 7, even
Connecting bolt, 8, junction steel plate, 9, bolt hole, 10, hanging ring, 11, steel pile casting, 12, slabstone clay
Specific implementation mode
The pile base construction method and its casing of non-filler large size solution cavity provided by the invention are made with reference to embodiment
Further in detail, completely illustrate.The embodiments described below is exemplary, and is only used for explaining the present invention, and cannot be understood
For limitation of the present invention.
As shown in figure 3, be dispersed with non-filler solution cavity 5 around the predeterminated position of karst area, non-filler solution cavity 5 it is upper
The ground in face is known as surface layer ground 4, and the ground below non-filler solution cavity 5 is known as bottom ground 6.
It includes at least two sequentially connected casing units of section to carry out casing 1 used by pile foundation construction, as shown in figure 4, phase
Adjacent casing unit is connected together by connecting bolt 7 and junction steel plate 8.
It is furnished with reinforcing bar in the casing 1, concrete grade must be higher than C40, ensure enough rigidity and intensity in order to avoid casing 1
It is deformed and cracks in use.The internal diameter of the casing unit is equal to default Pile Diameter, and thickness is 8~10cm,
Often section height 1.5m~2.0m.1 8~10cm of wall thickness of the casing, and the thickness for the steel pile casting that steel pile casting follow-up step uses only has
The rigidity of 1cm, casing 1 are far longer than steel pile casting, and work progress not will produce apparent deformation.
As shown in figure 5, casing unit inner wall eight bolts hole 9 of radially even setting, bolt hole 9 and casing unit top
And/or the distance of bottom end is 10cm：It is located at the above 10cm in bottom positioned at the bolt hole 9 of the casing unit of 1 the top of casing, is located at
The bolt hole 9 of the casing unit of 1 lowermost end of casing is located at the following 10cm in top, and the bolt hole 9 of remaining casing unit is located at away from top
The position in portion and each 10cm in bottom.In addition, being equipped with protruding openning, remaining casing positioned at the bottom of the casing unit of 1 the top of casing
Unit is that top is equipped with fossaperturate, and bottom is equipped with protruding openning, and so design is convenient for the connection positioning between adjacent casing unit.
Shown in Fig. 5, on each casing unit inner wall at the 20cm of top radially even pre-buried three semicircle reinforcing bar hanging rings 10.
As shown in fig. 6, connection bolt 7 is made of high-strength steel, including countersunk head, screw rod and nut, long 15~17cm, directly
25~28mm of diameter.
As shown in fig. 7, junction steel plate 8 uses high-strength steel, 8 length 26cm of junction steel plate, width 6cm, both ends are equipped with straight
The circular hole of 28~30mm of diameter.
Connection bolt 7 and junction steel plate 8 are all made of high strength steel, ensure to deform in casing unit decentralization process
And fracture.
The pile base construction method of non-filler large size solution cavity is carried out using above-mentioned casing 1, which is characterized in that including walking as follows
Suddenly：
The first step：The not exclusively the same casing unit of prefabricated more piece height, casing unit use concrete for making, are constructing
Buried setting position steel pile casting 3 is positioned.As shown in figure 3, in the embedded positioning steel pile casting 3 in ground, the top of steel pile casting 3 is positioned
Not less than ground, and the top for positioning steel pile casting is not less than the above 50cm in ground.The casing unit uses prefabrication, system
Strict control of quality when making, the size of each part error must be less than 5mm.
Second step：Surface layer ground 4 inside positioning steel pile casting 3 drills, and forms hole.The mantle rock of the drilling
Soil 4 is located at 5 top of non-filler solution cavity, and routinely boring method drills.Using drill hole of drilling machine to hole distance from bottom without
Stopping and propose drill bit when 5 top surface 1m of filler solution cavity, i.e. distance of 5 top surface of non-filler solution cavity apart from hole bottom is 1m,
Hole and non-filler solution cavity 5 do not penetrate through.Hole diameter is more than 15~20cm of default Pile Diameter.
Third walks：One casing unit is placed on above-mentioned hole, and makes casing unit and positions the center line of steel pile casting 3
Alignment, this casing unit are bottom end casing unit.One casing unit, which is placed on the method on hole, is：In positioning steel pile casting 3
Top set up two plate I-steel, with truck crane casing unit be placed on I-steel and and positioning steel pile casting 3 carry out centering
In place, ensure casing unit and position the center line alignment of steel pile casting 3, this casing unit is bottom end casing unit, that is, is located at shield
One casing unit of 1 bottommost of cylinder.
4th step：It takes a casing unit to be put in above the bottom end casing unit in third step again, makes in two casing units
Heart line is aligned, and two casing units are connected and fixed.Two adjacent casing units are carried out by connecting bolt 7 and junction steel plate 8
It is connected and fixed, during being connected and fixed and after the completion of being connected and fixed, need to check center and the verticality of casing unit, such as
The center line of fruit casing unit and range of the deviation beyond setting of positioning 3 center line of steel pile casting, then be adjusted until meeting
It is required that.
5th step：The two section casing units that 4th step obtains are transferred along hole, gradually up increases and connects casing list
Member, the method that is located by connecting is the same as the 4th step.Decentralization casing unit method be：Lift two section casing units using truck crane, extracts out
I-steel below the casing unit of bottom end is padded, casing is made slowly to be transferred in hole, casing list check at any time in decentralization process
The center of member and verticality, to ensure that the center line of two section casing units and the center line of positioning steel pile casting 3 are aligned.Casing
Unit must ensure that its center is less than 30mm with positioning 3 errors of centration of steel pile casting in decentralization process, and the error of perpendicularity is less than
1%.
6th step：After one section casing unit of decentralization, then the one section casing unit of connection on the casing unit resting on the ground,
The 4th step and the 5th step are so repeated, until the bottom of bottom end casing unit touches hole bottom, and the casing list of the top
The top of member is not less than ground.
7th step：The small stroke impact for carrying out 50~80cm with block stamp inside casing unit is located under hole, without filling
Surface layer ground 4 on object solution cavity 5 is extracted out when the distance of 5 top surface of hole distance from bottom non-filler solution cavity is 0.5m in hole
Mud, then proceed to the small stroke using 30~50cm break through under hole, the surface layer ground 4 on non-filler solution cavity 5,
Block stamp is finally proposed from hole.
Above-mentioned segmentation block stamp impact method can extraction be gone in time by the mud in hole, in this way, under the hole after perforation
Substantially the not no deposit of mud on the non-filler solution cavity bottom surface of side, is conducive to the steady placement of subsequent casing.If utilized
Drilling machine directly penetrates through hole, then falls to the bottom surface of the non-filler solution cavity below hole positioned at the mud of perforated originally
On, mud deposit is formed, this deposit is soft unstable, when casing is placed thereon, casing can be caused unstable.In addition,
Extraction mud can be used for the drilling of bottom ground 6.
8th step：After hole perforation, continue the casing unit that decentralization has been connected and fixed, when the bottom of the bottom end casing unit
Portion is not in contact with to the bottom surface of non-filler solution cavity, and when the bottom of the casing unit of the top is not higher than ground, by the top
Increasing by a casing unit above casing unit, the method that is located by connecting so is repeated with the 4th step, until the bottom end casing unit
The top that bottom touches the casing unit of the bottom surface of non-filler solution cavity and the top is not less than ground, then multiple casing units
It is sequentially connected simultaneously perforated holes and non-filler solution cavity 5, forms casing 1.
9th step：Filler is backfilled in the casing 1 obtained toward the 8th step, makes 1 bottom end of casing and 5 bottom surface of non-filler solution cavity
Between gap it is completely plugged.The filler of backfill is the mixture that slabstone, clay and cement are formed, and the ratio of three is 10:
5:1, with block stamp, punching press keeps mixture that the gap between 5 bottom surface of 1 bottom end of casing and non-filler solution cavity is completely plugged repeatedly.
Tenth step：Mud is poured into casing 1, then continues to drill using conventional boring method, continues to drill to default
After depth, borehole cleaning is carried out, transfers steel reinforcement cage, pours underwater concrete, forms pile foundation 2.
In above-mentioned steps, if a small amount of gap occurs in the coupling part of adjacent casing unit, it can be sticked at gap position
Water-stop glue band prevents mud in hole from leaking.
After the bottom supporting of bottom end casing unit is on 5 bottom surface of non-filler solution cavity, truck crane cannot loosen, bottom end casing
The gap of the bottom of unit and 5 bottom surface of non-filler solution cavity must be completely plugged, mud in hole when preventing lower layer's ground from drilling
It leaks out.
Casing unit is such as hampered in decentralization process to be hindered, and gasoline hammer can be used and beat on the casing unit top on most
It is set slowly to sink.
It is it is necessary to described herein finally：Above example is served only for making technical scheme of the present invention further detailed
Ground illustrates, should not be understood as limiting the scope of the invention, those skilled in the art's the above according to the present invention
Some the nonessential modifications and adaptations made all belong to the scope of protection of the present invention.
Claims (10)
1. the pile base construction method of non-filler large size solution cavity, which is characterized in that include the following steps：
The first step：The not exclusively the same casing unit of prefabricated more piece height, casing unit uses concrete for making, buried constructing
Setting position steel pile casting (3) is positioned；
Second step：The surface layer ground (4) internal along positioning steel pile casting (3) drills, and forms hole；
Third walks：One casing unit is placed on above above-mentioned hole, casing unit is made and positions the center line pair of steel pile casting (3)
Together, bottom end casing unit is formed；
4th step：One casing unit is put in the top of bottom end casing unit in third step again, makes the center line of two casing units
Alignment, and two casing units are connected and fixed；
5th step：The two section casing units that 4th step obtains are transferred along hole, are gradually up increased simultaneously at the top of casing unit
Casing unit is connected, the method that is located by connecting is with the 4th step, until bottom end casing unit contacts non-filler solution cavity (5) bottom surface, stops
Increase casing unit, all casing units form casing (1)；
6th step：Filler is backfilled in the casing (1) of the 5th step, makes nothing between casing (1) bottom end and non-filler solution cavity (5)
Gap；
7th step：Continue drilling inside casing (1) to predetermined depth, borehole cleaning transfers steel reinforcement cage, pours underwater concrete, shape
At pile foundation (2).
2. the pile base construction method of non-filler large size solution cavity according to claim 1, which is characterized in that in second step
Hole is not connected to non-filler solution cavity (5).
3. the pile base construction method of non-filler large size solution cavity according to claim 2, which is characterized in that in second step
In, drilling to hole bottom stops when being 0.5m~1.5m at a distance from non-filler solution cavity (5) top surface and proposes drill bit.
4. the pile base construction method of non-filler large size solution cavity according to claim 2, which is characterized in that the 5th step is specific
It is divided into following three steps：
(a) when hole is not connected to non-filler solution cavity (5), casing unit is transferred, will be increased above the casing unit of the top
One casing unit, the method that is located by connecting so is repeated with the 4th step, until the bottom of bottom end casing unit touches hole bottom,
And the top of the casing unit of the top is not less than ground；
(b) the surface layer ground (4) on non-filler solution cavity (5) is broken through inside casing unit, until hole and non-filler solution cavity
(5) it is connected to；
(c) casing unit is transferred, when the bottom of the bottom end casing unit is not in contact with the bottom surface to non-filler solution cavity (5), and
When the bottom of the casing unit of the top is not higher than ground, a casing unit, positioning will be increased above the casing unit of the top
Connection method so repeats, with the 4th step until the bottom of the bottom end casing unit touches the bottom surface of non-filler solution cavity (5)
And the top of the casing unit of the top is not less than ground, forms casing (1).
5. the pile base construction method of non-filler large size solution cavity according to claim 4, which is characterized in that the step
(b) in, the small stroke that 50~80cm is carried out with block stamp impacts the surface layer ground (4), until hole distance from bottom non-filler is molten
When the distance of hole (5) top surface is 30cm~70cm, extract the mud in hole out, then using 30~50cm small stroke break through it is described
Surface layer ground (4), connected holes and non-filler solution cavity (5), propose block stamp from hole.
6. the pile base construction method of non-filler large size solution cavity according to claim 1, which is characterized in that described in the first step
Positioning steel pile casting (3) the top be not less than ground.
7. the pile base construction method of non-filler large size solution cavity according to claim 1, which is characterized in that in third step,
Two plate I-steel are set up at the top of positioning steel pile casting (3), casing unit is placed on I-steel and and is positioned with truck crane
It is in place that steel pile casting (3) carries out centering.
8. the pile base construction method of non-filler large size solution cavity according to claim 1, which is characterized in that in the 6th step,
The filler backfilled in the casing (1) is the mixture that slabstone, clay and cement are formed, using block stamp punching press mixture repeatedly,
It is completely plugged to casing bottom end and the gap of non-filler solution cavity (5) bottom surface.
9. the pile base construction method of non-filler large size solution cavity according to claim 1, which is characterized in that in the 7th step,
Mud is poured into casing (1), then continues to drill inside casing (1), until after predetermined depth, borehole cleaning is carried out, transfers reinforcing bar
Cage pours underwater concrete, forms pile foundation (2).
10. the casing for non-filler large size solution cavity, which is characterized in that for any pile foundation of claim 1~12
Construction method, casing (1) include at least two sequentially connected casing units of section, and the casing unit uses concrete for making.
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| CN109868810A (en) * | 2019-02-27 | 2019-06-11 | 中建一局集团第一建筑有限公司 | One kind passing through buried major diameter discarded pipe and does operation pile making method |
| CN112855029A (en) * | 2021-04-26 | 2021-05-28 | 中铁九局集团第七工程有限公司 | Goaf drilling external pipe expansion construction method |
| CN113404049A (en) * | 2021-08-03 | 2021-09-17 | 中国港湾工程有限责任公司 | Offshore platform pile foundation construction method |
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| CN115198753A (en) * | 2022-06-20 | 2022-10-18 | 上海工程技术大学 | Structural body and manufacturing mold and application thereof |
| CN115450204A (en) * | 2022-10-17 | 2022-12-09 | 上海宝冶集团有限公司 | Construction method for hole forming of karst cave geological concrete by recharging and matching with rotary digging of steel pile casing |
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| CN109868810A (en) * | 2019-02-27 | 2019-06-11 | 中建一局集团第一建筑有限公司 | One kind passing through buried major diameter discarded pipe and does operation pile making method |
| CN109797740A (en) * | 2019-03-27 | 2019-05-24 | 湖北中南岩土工程有限公司 | A kind of cast-in-situ bored pile and its construction method across underground civil defence structure |
| CN112855029A (en) * | 2021-04-26 | 2021-05-28 | 中铁九局集团第七工程有限公司 | Goaf drilling external pipe expansion construction method |
| CN113404049A (en) * | 2021-08-03 | 2021-09-17 | 中国港湾工程有限责任公司 | Offshore platform pile foundation construction method |
| CN114525778A (en) * | 2021-12-20 | 2022-05-24 | 中铁二局第四工程有限公司 | Karst area karst cave pile foundation pile forming method |
| CN114525778B (en) * | 2021-12-20 | 2024-06-04 | 中铁二局第四工程有限公司 | Karst area karst cave pile foundation piling method |
| CN115198753A (en) * | 2022-06-20 | 2022-10-18 | 上海工程技术大学 | Structural body and manufacturing mold and application thereof |
| CN115450204A (en) * | 2022-10-17 | 2022-12-09 | 上海宝冶集团有限公司 | Construction method for hole forming of karst cave geological concrete by recharging and matching with rotary digging of steel pile casing |
| CN115450204B (en) * | 2022-10-17 | 2023-11-21 | 上海宝冶集团有限公司 | Construction method for rotary digging and pore forming of karst cave geological concrete recharging matched with steel casing |
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