CN108978661A - Cast-in-situ bored pile pulls out construction method - Google Patents
Cast-in-situ bored pile pulls out construction method Download PDFInfo
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- CN108978661A CN108978661A CN201810850225.4A CN201810850225A CN108978661A CN 108978661 A CN108978661 A CN 108978661A CN 201810850225 A CN201810850225 A CN 201810850225A CN 108978661 A CN108978661 A CN 108978661A
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- stake
- wirerope
- cast
- casing
- pile
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D9/00—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof
- E02D9/02—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof by withdrawing
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- Engineering & Computer Science (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)
- Structural Engineering (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
The invention discloses a kind of cast-in-situ bored piles to pull out construction method, it is related to the bearing pile field of building field, when solving that old stake lifting is pulled out in cast-in-situ bored pile, old stake and wirerope lock are detached from the technical issues of causing security risk, its key points of the technical solution are that: Step 1: true fixed pile, groove and exposure pile crown are excavated, determines the stake position for needing to pull out；Step 2: casing is in place；Step 3: vibration sinking tube, pulling out pile body, pile pulling body is played with wirerope and old stake is hung out into sleeve opening, and wirerope is equipped with hanging ring, will hang stake with loop wheel machine after wirerope and pile body fixation, when hanging ring and suspension hook are detached from, the suspension hook is equipped with the falling-proof apparatus for preventing wirerope from falling；Step 4: backfill stake holes；Step 5: the high pre- firming of stake holes heap, settlement observation, after mound to 2 meters of high precompressed, daily periodic monitor discards stake centralized processing；Its advantage is that increasing during cast-in-situ bored pile is pulled out to the protective of the lifting of old stake.
Description
Technical field
The present invention relates to the bearing pile field of building field, in particular to a kind of cast-in-situ bored pile pulls out construction method.
Background technique
It is usually met in construction because the structures first constructed do not account for the construction of subsequent structures in construction projects
The barrier arrived is also more and more, and the cast-in-situ bored pile for especially pulling out existing structure object is very common.
The Chinese patent of Publication No. CN107338795A, which discloses a kind of full-sleeve, to be pulled out column row's formula cast-in-situ bored pile and applies
Work method, main includes excavating the old stake of old pile head, effective position；The positioning of pile-drawing machine full-sleeve, it is continuous to creep into, until stake bottom
1m；Wirerope lock is transferred, extracts old stake with crane；Using cement earthen backfill hole, full-sleeve is extracted.The brill of the full-sleeve
Head divides internal tooth, middle tooth and external tooth, and the pipe shaft of the full-sleeve is equipped with several holes, within the scope of the full-sleeve interface section 1m
Pipe shaft outer diameter is greater than outer tube diameter 1-3cm, and the pipe shaft outer diameter within the scope of the bit part 2m of full-sleeve is greater than outer tube diameter 1-
3cm。
But when lifting by crane old stake, is latched with wirerope and extract old stake, wirerope passes through hanging ring far from one end of old stake
It is connect with the suspension hook of crane, is easy to generate shaking when lifting by crane old stake, wire-rope sling exists and separates with suspension hook at this time
Situation has some potential safety problems.
Summary of the invention
The object of the present invention is to provide a kind of cast-in-situ bored piles to pull out construction method, its advantage is that, increase cast-in-situ bored pile
To the protective of the lifting of old stake during pulling out.
Above-mentioned technical purpose of the invention technical scheme is that: a kind of cast-in-situ bored pile pulls out construction
Method includes the following steps,
Step 1: true fixed pile, excavates groove and exposure pile crown, determines the stake position for needing to pull out；
Step 2: casing is in place；
Step 3: vibration sinking tube, pulls out pile body, under the vibration hammer vibration that the starting of 150kw zero current is hung with 120T pedrail crane
Under heavy steel pipe to cast-in-situ bored pile bottom position at 50-100cm, during casing sinks, air compressor machine and centrifugal high pressure are opened
Soil flush clean to pile body is independently stripped out on the outside of old stake in formula water pump progress casing, finally singly opens high pressure 6m3 air pressure,
By slime water in casing as air-flow all overflows casing；
Pile pulling body is played with wirerope and old stake is hung out into sleeve opening, and in old stake outer wall, wirerope is equipped with and hangs wirerope-winding
Ring will hang stake with loop wheel machine after wirerope and pile body fixation, and when hanging ring and suspension hook are detached from, the suspension hook is equipped with and prevents
The falling-proof apparatus that wirerope is fallen；
Step 4: backfill stake holes, is mixed and stirred with the cement scene of progress, be backfilled in casing, start the vibration hammer being fixed on casing,
Casing is lifted by crane using loop wheel machine；
Step 5: the high pre- firming of stake holes heap, settlement observation, after mound to 2 meters of high precompressed, daily periodic monitor is discarded stake and is concentrated
Processing.
Through the above technical solutions, pulled out old stake outside the soil body with wirerope during cast-in-situ bored pile is pulled out,
Falling-proof apparatus plays protective action to the lifting of old stake during loop wheel machine lifts by crane, when so that hanging ring and suspension hook separating, protection dress
Setting can continue to lift by crane old stake, enhance the protective of old stake lifting, existing security risk during lifting be reduced, old
After stake lifting, stake holes is backfilled, lifts by crane casing, the high pre- firming of stake holes heap, settlement observation using loop wheel machine.
The present invention is further arranged to: the suspension hook is divided into vertical portion and hook part, and the falling-proof apparatus includes being provided with
Wirerope is arranged in close to the protective rope of hanging ring one end in the annular placing groove of vertical portion outer wall, and the protective rope is far from wirerope
One ends wound after placing groove, wind out placing groove and tie up on protective rope, the outer wall that the vertical portion is wound in protective rope
Equipped with protective rope is limited in two semi-circular shape stop collars in placing groove, the both ends of two stop collars are equipped with connection
Plate, opposite connecting plate is connected by clamping screw on two stop collars, and the clamping screw is being pierced by the two of connecting plate
End is threaded with latch segment, and the length of the protective rope is greater than placing groove to the straight line position of protective rope and wire rope connection point
It sets.
Through the above technical solutions, the length of protective rope is greater than placing groove to the straight line position of protective rope and wire rope connection point
It sets, so that protective rope is in relaxed state, protective rope is fixed on the vertical portion of suspension hook by the setting of two stop collars, in steel
When hanging ring in cord is separated with suspension hook, protective rope is straightened and stress, and protective rope acts as the effect of wirerope at this time.
The present invention is further arranged to: the falling-proof apparatus includes the drawstring being arranged on hanging ring, and the drawstring is separate to be hung
One end of ring is fixed on suspension hook.
Through the above technical solutions, drawstring, after hanging ring is separated with suspension hook, lifting continues to lift by crane the effect of old stake, reduce old
A possibility that stake is fallen.
The present invention is further arranged to: suspension hook upper end side wall is equipped with the curved rod extended to immediately below suspension hook, institute
It states curved rod and is equipped with the guide cylinder being distributed along the vertical direction far from one end of suspension hook, the guide cylinder is for steel wire penetrating.
Through the above technical solutions, the setting of curved rod is so that guide cylinder is capable of fixing below suspension hook, convenient for wirerope
Pass through, the setting of guide cylinder reduces the amplitude of fluctuation of wirerope.
The present invention is further arranged to: described sleeve pipe lower end is welded with ring-type fixing plate, and the fixed plate is far from casing
One end is equipped with several teeth.
Through the above technical solutions, by tooth be arranged in fixed plate, enable tooth casing using when be just welded to set
Pipe lower end, reduce in casing transportational process tooth damage, and tooth damage when, using gas cutting by fixed plate from casing
It removes.
The present invention is further arranged to: it is upward that described sleeve pipe outer wall in position corresponding with each tooth offers several spirals
Deflector chute.
Through the above technical solutions, the setting of deflector chute is so that the tooth of lower end is located at set when boring dynamic in soil
The soil of pipe outer wall enters deflector chute and moves along deflector chute to sleeve upper end, reduces the soil body and enters the intracorporal resistance of soil to casing
Power.
The present invention is further arranged to: the opposite cell wall of the deflector chute is equipped with cutting close to the notch position of deflector chute
Sword.
Through the above technical solutions, cutting edge, when Sleeve drill buries internal, the soil body on Casing-Cutting periphery is conducive to casing
Into in the soil body.
The present invention is further arranged to: cement slurry does not stop to be slowly stirred during slip casting in step 4 backfill stake holes,
Pass through the screen to filtrate when cement grout is in injection hole.
Through the above technical solutions, ceaselessly stirring so that cement slurry solidifies uniformly after entering in sleeve, and sieve will
Cement slurry is discharged in biggish particle in cement slurry.
The present invention is further arranged to: soil layer identical to infiltration coefficient answers slip casting to bind first, then from bottom to top into
Row slip casting, if the infiltration coefficient of soil layer increases with depth, should slip casting from bottom to top, if alternating layers stratum, first to infiltration or
The big stratum of porosity carries out slip casting.
Through the above technical solutions, using different grouting modes, convenient for being located at different infiltration coefficient soil layer internal drillings
Perfusion.
In conclusion the invention has the following advantages: suspension hook, which is equipped with, prevents steel wire when wirerope lifts by crane old stake
The falling-proof apparatus that rope is fallen, increases protective of old stake during lifting, so that old stake is during lifting.
Detailed description of the invention
Fig. 1 is the flow chart of the construction method of the present embodiment；
Fig. 2 is the present embodiment for embodying the structural schematic diagram during protective rope acts on old stake lifting；
Fig. 3 is the amplification assumption diagram in the portion A in Fig. 2；
Fig. 4 is the structural schematic diagram that the present embodiment is used to embody falling-proof apparatus；
Fig. 5 is the present embodiment for embodying the structural schematic diagram during drawstring acts on old stake lifting；
Fig. 6 is the amplification assumption diagram in the portion B in Fig. 5；
The present embodiment is used to embody the structural schematic diagram of deflector chute in Fig. 7.
Appended drawing reference: 1, suspension hook；11, vertical portion；12, hook part；13, falling-proof apparatus；131, placing groove；132, it protects
Rope；133, stop collar；134, connecting plate；135, clamping screw；136, latch segment；137, drawstring；138, curved rod；139, it is oriented to
Cylinder；14, wirerope；141, hanging ring；15, casing；151, fixed plate；152, tooth；153, deflector chute；154, cutting edge；2, old stake.
Specific embodiment
Below in conjunction with attached drawing, invention is further described in detail.
Embodiment:
A kind of cast-in-situ bored pile pulls out construction method, such as Fig. 1, includes the following steps,
Step 1: true fixed pile, excavates groove and exposure pile crown, determines the stake position for needing to pull out；
Step 2: casing is in place；
Step 3: vibration sinking tube, pulls out pile body, is excavated by the always side of packet and be crushed and remove steel concrete cushion cap, need to respectively be pulled out in exposure cushion cap
Except the stake top of stake, such as stake diameter, sectional area and depth, contain two water routes and two gas for processing according to the actual situation on site
The diameter 1200mm casing that the rigidity on road is met the requirements；The vibration hammer vibration of 150kw zero current starting is hung with 120T pedrail crane
Under dynamic sinking steel pipe to cast-in-situ bored pile bottom position at 50-100cm, during casing sinks, air compressor machine and high pressure are opened
Soil flush clean to pile body is independently stripped out on the outside of old stake in centrifugal water pump progress casing, finally singly opens high pressure 6m3
Air pressure, by slime water in casing as air-flow all overflows casing.
Such as Fig. 7,15 lower end of casing is welded with ring-type fixing plate 151, and fixed plate 151 is equipped with several far from one end of casing 15
Tooth 152 is arranged in fixed plate 151 tooth 152, and tooth 152 is enabled just to be welded to 15 lower end of casing when casing 15 uses,
The damage of the tooth 152 in 15 transportational process of casing is reduced, and tooth 152 is when damage, using gas cutting by fixed plate 151 from set
It is removed on pipe 15, so that tooth 152 is removed fixed plate 151 using gas cutting when damage from casing 15.
Such as Fig. 7, in 15 sinking watching of casing, 15 outer wall of casing offers several in position corresponding with each tooth 152
The upward deflector chute 153 of spiral, the setting of deflector chute 153 is so that the tooth 152 of 15 lower end of casing is located at when boring dynamic in soil
The soil of 15 outer wall of casing enters deflector chute 153 and moves along deflector chute 153 to 15 upper end of casing, reduces the soil body to casing 15
Into the intracorporal resistance of soil.The opposite cell wall of deflector chute 153 is equipped with cutting edge 154 close to the notch position of deflector chute 153, cuts
Sword 154 is cut when casing 15 pierces in the soil body, the soil body on 15 periphery of Casing-Cutting is conducive to casing 15 and enters in the soil body.
When vibrating pile pulling, it should be pulled out at vibration vertically upward, when pile top remains 1-2 meters away from ground, should stop vibrating immediately,
It is risen and is pulled out with crane.
Such as Fig. 2 and Fig. 3, pile pulling body is played with wirerope 14 and old stake 2 is hung out 15 mouthfuls of casing, wirerope 14 is wrapped in old stake
In 2 outer walls, wirerope 14 is equipped with hanging ring 141, will hang stake with loop wheel machine after wirerope 14 and pile body fixation；In old stake 2
As old stake 2 is gradually removed out of the soil body during lifting, old stake 2 is easy to generate shaking, such as influenced by strong wind weather or
Person lifts by crane jiggly influence, so that wirerope 14 also with shaking, is easy at this time so that hanging ring 141 and suspension hook 1 are detached from, therefore
The falling-proof apparatus 13 for preventing wirerope 14 from falling is equipped on suspension hook 1.
Such as Fig. 3 and Fig. 4, suspension hook 1 is divided for vertical portion 11 and hook part 12 at this time, falling-proof apparatus 13 include be provided with it is vertical
Wirerope 14 is arranged in close to the protective rope 132 of 141 one end of hanging ring in the annular placing groove 131 of 11 outer wall of portion, and protective rope 132 is remote
One ends wound from wirerope 14 winds out placing groove 131 and ties up on protective rope 132, at this time protective rope after placing groove 131
In 132 insertion placing grooves 131.In order not to allow protective rope 132 to drop out placing groove 131, therefore vertical portion 11 is wound in protective rope 132
Outer wall be equipped with protective rope 132 be limited in two semi-circular shape stop collars 133 in placing groove 131, two 133 phases of stop collar
Pair both ends be equipped with connecting plate 134, opposite connecting plate 134 is connected by clamping screw 135 on two stop collars 133
It connects, clamping screw 135 is threaded with latch segment 136 at the both ends for being pierced by connecting plate 134；To 134 direction turn of connecting plate
Latch segment 136, so that latch segment 136 and connecting plate 134 contradict and squeeze two pieces of connecting plates 134, so that connecting plate 134 drives limit
Position ring 133 and vertical portion 11 contradict, and protective rope 132 is fixed in placing groove 131.
Such as Fig. 4, when suspension hook 1 is connect with hanging ring 141, the length of protective rope 132 is greater than placing groove 131 to protective rope 132
With the linear position of 14 tie point of wirerope so that protective rope 132 is in relaxed state, when hanging ring 141 and suspension hook 1 are detached from,
Protective rope 132 is straightened by stress, and protective rope 132 acts as the effect of wirerope 14 at this time, continues so that old stake 2 is lifted by crane.
Such as Fig. 5 and Fig. 6, be scheduled on suspension hook 1, drawstring 137 is in relaxed state at this time, when hanging ring 141 fastly remove suspension hook 1 or
When person removes suspension hook 1, drawstring 137 applies pulling force to hanging ring 141, so that old stake 2 can continue to lift by crane.
Such as Fig. 3, in order to reduce the shaking of wirerope 14, therefore 1 upper end side wall of suspension hook is equipped with and extends to immediately below suspension hook 1
Curved rod 138, curved rod 138 is equipped with the guide cylinder 139 that is distributed along the vertical direction far from one end of suspension hook 1, and guide cylinder 139 supplies
Wirerope 14 passes through, and 139 internal diameter of guide cylinder can also pass through for hanging ring 141, at this time the internal diameter restrictions of guide cylinder 139 wirerope
14 moving range, and then reduce the amplitude of fluctuation of wirerope 14.
Such as Fig. 1, Step 4: backfill stake holes, is mixed and stirred with the cement scene of progress, be backfilled in casing, stake holes backfills compactness
Control is the key that construction prevents collapse hole, therefore cement slurry does not stop to be slowly stirred during slip casting, and cement grout is injecting
Pass through the screen to filtrate when in hole, start the vibration hammer being fixed on casing, lifts by crane casing using loop wheel machine；It is identical to infiltration coefficient
Soil layer answers slip casting to bind first, then carries out slip casting from bottom to top, should be under if the infiltration coefficient of soil layer increases with depth
And upper slip casting, if alternating layers stratum, stratum big to infiltration or porosity first carries out slip casting.
Step 5: the high pre- firming of stake holes heap, settlement observation, after mound to 2 meters of high precompressed, daily periodic monitor discards stake
Centralized processing.
This specific embodiment is only explanation of the invention, is not limitation of the present invention, those skilled in the art
Member can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but as long as at this
All by the protection of Patent Law in the scope of the claims of invention.
Claims (9)
1. a kind of cast-in-situ bored pile pulls out construction method, which is characterized in that include the following steps,
Step 1: true fixed pile, excavates groove and exposure pile crown, determines the stake position for needing to pull out；
Step 2: casing is in place；
Step 3: vibration sinking tube, pile body is pulled out, under the vibration hammer vibration that the starting of 150kw zero current is hung with 120T pedrail crane
Under heavy steel pipe to cast-in-situ bored pile bottom position at 50-100cm, during casing sinks, air compressor machine and centrifugal high pressure are opened
Soil flush clean to pile body is independently stripped out on the outside of old stake in formula water pump progress casing, finally singly opens high pressure 6m3 air pressure,
By slime water in casing as air-flow all overflows casing；
Pile pulling body is played with wirerope and old stake is hung out into sleeve opening, and in old stake outer wall, wirerope is equipped with and hangs wirerope-winding
Ring will hang stake with loop wheel machine after wirerope and pile body fixation, and when hanging ring and suspension hook are detached from, the suspension hook is equipped with and prevents
The falling-proof apparatus that wirerope is fallen；
Step 4: backfill stake holes, is mixed and stirred with the cement scene of progress, be backfilled in casing, start the vibration hammer being fixed on casing,
Casing is lifted by crane using loop wheel machine；
Step 5: the high pre- firming of stake holes heap, settlement observation, after mound to 2 meters of high precompressed, daily periodic monitor is discarded stake and is concentrated
Processing.
2. cast-in-situ bored pile according to claim 1 pulls out construction method, which is characterized in that the suspension hook (1) is divided into perpendicular
Straight portion (11) and hook part (12), the falling-proof apparatus (13) include the annular placing groove for being provided with vertical portion (11) outer wall
(131), the protective rope (132) in wirerope (14) close to hanging ring (141) one end is set, and the protective rope (132) is far from steel wire
The one ends wound of rope (14) winds out placing groove (131) and ties up on protective rope (132) after placing groove (131), described vertical
Portion (11) is equipped with two semicircular rings being limited in protective rope (132) in placing groove (131) in the outer wall that protective rope (132) is wound
The both ends of shape stop collar (133), two stop collars (133) are equipped with connecting plate (134), are located at two stop collars (133)
Upper opposite connecting plate (134) is connected by clamping screw (135), and the clamping screw (135) is being pierced by connecting plate (134)
Both ends are threaded with latch segment (136), and the length of the protective rope (132) is greater than placing groove (131) to protective rope (132)
With the linear position of wirerope (14) tie point.
3. cast-in-situ bored pile according to claim 1 pulls out construction method, which is characterized in that falling-proof apparatus (13) packet
The drawstring (137) being arranged on hanging ring (141) is included, the drawstring (137) is fixed on suspension hook (1) far from the one end of hanging ring (141)
On.
4. cast-in-situ bored pile according to claim 1 or 2 or 3 pulls out construction method, which is characterized in that the suspension hook (1)
Upper end side wall, which is equipped with, extends to curved rod (138) immediately below suspension hook (1), the curved rod (138) far from suspension hook (1) one
End is equipped with the guide cylinder (139) being distributed along the vertical direction, and the guide cylinder (139) passes through for wirerope (14).
5. cast-in-situ bored pile according to claim 1 pulls out construction method, which is characterized in that the weldering of described sleeve pipe (15) lower end
It is connected to ring-type fixing plate (151), the fixed plate (151) is equipped with several teeth (152) far from the one end of casing (15).
6. cast-in-situ bored pile pulls out construction method according to claim 1 or 5, which is characterized in that described sleeve pipe (15) is outside
Wall offers the upward deflector chute of several spirals (153) in position corresponding with each tooth (152).
7. cast-in-situ bored pile according to claim 6 pulls out construction method, which is characterized in that the deflector chute (153)
Opposite cell wall is equipped with cutting edge (154) close to the notch position of deflector chute (153).
8. cast-in-situ bored pile according to claim 1 pulls out construction method, which is characterized in that step 4 backfills water in stake holes
Slurry body does not stop to be slowly stirred during slip casting, and the screen to filtrate is passed through when cement grout is in injection hole.
9. cast-in-situ bored pile according to claim 1 pulls out construction method, which is characterized in that soil identical to infiltration coefficient
Layer, answers slip casting to bind, then carries out slip casting from bottom to top first, if the infiltration coefficient of soil layer increases with depth, should from lower and
Upper slip casting, if alternating layers stratum, stratum big to infiltration or porosity first carries out slip casting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810850225.4A CN108978661B (en) | 2018-07-28 | 2018-07-28 | Construction method for removing cast-in-situ bored pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810850225.4A CN108978661B (en) | 2018-07-28 | 2018-07-28 | Construction method for removing cast-in-situ bored pile |
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| Publication Number | Publication Date |
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| CN108978661A true CN108978661A (en) | 2018-12-11 |
| CN108978661B CN108978661B (en) | 2020-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810850225.4A Active CN108978661B (en) | 2018-07-28 | 2018-07-28 | Construction method for removing cast-in-situ bored pile |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110080210A (en) * | 2019-04-20 | 2019-08-02 | 中国二十冶集团有限公司 | Cast-in-place pile construction method in discarded ground |
| CN110952555A (en) * | 2019-12-09 | 2020-04-03 | 广州市盾建地下工程有限公司 | Pile pulling method and pile pulling system |
| CN113529714A (en) * | 2021-07-17 | 2021-10-22 | 南京桥新建设有限公司 | Construction method for replacing old pile |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110080210A (en) * | 2019-04-20 | 2019-08-02 | 中国二十冶集团有限公司 | Cast-in-place pile construction method in discarded ground |
| CN110952555A (en) * | 2019-12-09 | 2020-04-03 | 广州市盾建地下工程有限公司 | Pile pulling method and pile pulling system |
| CN113529714A (en) * | 2021-07-17 | 2021-10-22 | 南京桥新建设有限公司 | Construction method for replacing old pile |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108978661B (en) | 2020-12-01 |
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