CN114718070A - Construction method for breaking soil between piles and pile heads of super-irrigation cast-in-place pile - Google Patents
Construction method for breaking soil between piles and pile heads of super-irrigation cast-in-place pile Download PDFInfo
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- CN114718070A CN114718070A CN202210486326.4A CN202210486326A CN114718070A CN 114718070 A CN114718070 A CN 114718070A CN 202210486326 A CN202210486326 A CN 202210486326A CN 114718070 A CN114718070 A CN 114718070A
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- 239000002689 soil Substances 0.000 title claims abstract description 48
- 238000010276 construction Methods 0.000 title claims abstract description 32
- 238000003973 irrigation Methods 0.000 title claims description 10
- 238000005520 cutting process Methods 0.000 claims abstract description 59
- 230000002787 reinforcement Effects 0.000 claims abstract description 24
- 238000009412 basement excavation Methods 0.000 claims abstract description 5
- 230000004927 fusion Effects 0.000 claims abstract description 5
- 238000003466 welding Methods 0.000 claims abstract description 5
- 230000000694 effects Effects 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 23
- 239000010959 steel Substances 0.000 claims description 23
- 238000005553 drilling Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 14
- 238000004140 cleaning Methods 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 230000002262 irrigation Effects 0.000 description 4
- 241000761557 Lamina Species 0.000 description 1
- 238000005267 amalgamation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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
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- 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
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- General Life Sciences & Earth Sciences (AREA)
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- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The application relates to the technical field of cast-in-place pile construction, and discloses a construction method for breaking soil among cast-in-place piles and pile heads of a super-cast-in-place pile, wherein soil layer excavation is performed from an area with large pile spacing of cast-in-place piles to an area with small pile spacing, when the soil layer cannot be directly excavated due to too small pile spacing, the soil layer among the cast-in-place piles is broken by using a pile driver, and then soil is transported to an empty area of a foundation pit to be cleaned; then, cutting two annular cutting seams at the position, close to the bottom of the foundation pit, of the pile head by using an annular cutting device; then breaking the concrete between the two annular cutting seams, and fusing the reinforcement cage along the circumferential direction by using a welding gun; and then, hoisting the pile head by a crane, sawing the pile head from the cast-in-place pile along the fusion joint of the reinforcement cage, and then hoisting the sawn pile head out of the foundation pit. This application has the realization and clears away fast and the broken fast of bored concrete pile head to the stake is between the stake to improve the effect of efficiency of construction.
Description
Technical Field
The application relates to the technical field of cast-in-place pile construction, in particular to a construction method for breaking soil and pile heads between super-cast-in-place piles.
Background
The cast-in-place pile is a common foundation pile form, and the construction steps are roughly as follows: and forming a hole by using a pile machine, protecting the wall by using mud until the hole is drilled to the elevation of the hole bottom, then putting down a reinforcement cage, then inserting a guide pipe downwards and pouring concrete.
In the construction process of the cast-in-place pile, the normal pile top elevation is positioned at the bottom of the foundation pit and has a certain height difference with the construction surface. However, in the irrigation construction, in order to avoid the situation of insufficient irrigation, the over irrigation is generally carried out, and the height of the over irrigation generally exceeds the bottom of the foundation pit by 0.5-1.0 m.
However, when the foundation pit is excavated in the water-rich soft geological area, the foundation pit excavation is difficult to enter the large-scale machine due to the poor bearing capacity of the soil layer, so the foundation pit excavation is usually performed after the soil layer is reinforced by using the cast-in-place pile. However, as the foundation pit is not excavated, the site constructors are difficult to judge the filling condition by experience, in order to avoid tank shortage, the filling is generally stopped when the concrete is observed to flow upward to be close to the filling opening, so that the over filling height usually exceeds 2m, the pile head is broken by continuously adopting the conventional manual pile head breaking mode, the efficiency is low, and the soil among the piles is difficult to remove in the dense area of the filling pile.
Disclosure of Invention
The application provides a construction method for breaking soil between over-poured piles and pile heads, and aims to solve the problems that excavation of soil between piles is difficult and pile head breaking efficiency is low due to over-pouring of the poured piles.
The application provides a construction method for breaking soil between super-irrigation cast-in-place piles and pile heads, which adopts the following technical scheme:
a construction method for breaking soil between piles and pile heads of a super-irrigation cast-in-place pile comprises the following steps:
s1, excavating a soil layer: excavating a soil layer from a region with large pile spacing of the cast-in-place piles to a region with small pile spacing; when the distance between piles is too small, so that a soil layer cannot be directly excavated, crushing the soil layer between the cast-in-place piles by using a pile driver, transporting the soil body to an open area of a foundation pit, and cleaning;
s2, cleaning soil adhered to the pile head;
s3, pile head breaking construction:
s31, cutting two annular cutting seams at the position, close to the bottom of the foundation pit, of the pile head by using an annular cutting device;
s32, breaking the concrete between the two annular cutting seams to expose the steel reinforcement cage, and fusing the steel reinforcement cage along the circumferential direction by using a welding gun;
s33, hoisting the pile head through a crane, sawing the pile head from the cast-in-place pile along the fusion joint of the reinforcement cage, and hoisting the sawn pile head out of the foundation pit;
and S4, repeating the steps S2-S3 until all pile heads are broken.
Through adopting above-mentioned technical scheme, when the bored concrete pile construction finishes carrying out the foundation ditch when beginning, follow and excavate from the big region of stake interval to the little region of stake interval, so, can make the pile head that is located the big region of stake interval expose completely, make the pile head part that is located the transition region that the stake interval diminishes by big expose, so that when the soil layer between the bored concrete pile in the little region of follow-up pile driver extrusion stake interval, the soil layer can collapse automatically in the effect of pile driver, thereby conveniently abolish stake soil. When carrying out the pile head and breaking away, utilize the circular cutting device earlier to cut twice annular cutting seam in the pile head is close to foundation ditch bottom department for follow-up when breaking the concrete structure between the twice annular cutting seam, stress can not spread to bury underground in the intraformational bored concrete pile festival section and upper portion pile head, ensures on the one hand to bury underground in the intraformational bored concrete pile festival section structure completely, and on the other hand makes constructor when breaking away concrete structure, upper portion pile head can not burst apart, thereby ensures construction safety. And after the reinforcement cage is exposed, the reinforcement cage is fused along the circumferential direction by using a welding gun so as to be convenient for sawing off the pile head by using a wire saw machine. Compare in the construction scheme of manual progressively abolishing the pile head, this application can be followed the pile head bottom and directly cut the pile head, has improved construction safety, and in the work progress, construction safety obtains effectively guaranteeing.
Preferably, before the circular cutting device is used for cutting concrete, a drill hole is drilled in the peripheral wall of the pile head close to the bottom of the foundation pit, in the drilling process, when the drill bit reaches the position of the reinforcement cage in the pile head, the drilling is stopped, and then the drilling depth is measured so as to determine the cutting depth of the circular cutting device.
Through adopting above-mentioned technical scheme, the mounted position of circular cutting device can be confirmed to the existence of drilling to the circular cutting device can not contact with the steel reinforcement cage at the in-process of cutting, thereby shows the saw sword that reduces the circular cutting device and collapses the possibility of breaking up.
Preferably, in S31, the distance between two annular cutting seams is 2-3 cm; and in S32, the width of the notch generated after the steel bar is melted is ensured to be 1-2 cm.
Through adopting above-mentioned technical scheme, through the interval between the restriction twice annular cutting seam for twice annular cutting seam still plays the effect of direction, makes follow-up welder that utilizes with reinforcing cage along the breach that circumference fusing formed circular, so that follow-up rope saw machine cutting pile head that utilizes. Simultaneously, through the width of control fusing breach for rope saw can not contact with the steel reinforcement cage at the course of the work, thereby reduces the wearing and tearing of rope saw.
Preferably, the circular cutting device comprises an annular rail, a movable seat is arranged on the annular rail in a sliding mode, the movable seat is connected with the annular rail in a sliding mode along the circumferential direction of the annular rail, and a circular saw is arranged on the movable seat.
Through adopting above-mentioned technical scheme, when the construction of carrying out annular cutting seam, arrange the bottom at the pile head when the circular orbit, then start the circular disk saw, remove the seat and drive the circular disk saw and remove on the circular orbit according to the cutting speed of circular disk saw to surely go out annular cutting seam.
Preferably, the movable seat comprises a movable seat arranged on the annular rail in a sliding mode and a fixed plate arranged on the movable seat, a driving piece for driving the fixed plate to move is arranged on the movable seat, the fixed plate moves towards the direction close to or away from the movable seat under the action of the driving piece, and the circular saw is arranged on the fixed plate.
Through adopting above-mentioned technical scheme for the height-adjustable who removes the seat, thereby the height that removes the seat is adjusted according to the drilling depth to the convenience, and then changes circular saw's height, so that circular saw's saw sword can not bump with the steel reinforcement cage in the course of the work, thereby makes circular saw's saw sword be difficult for collapsing bad.
Preferably, the movable seat comprises a channel steel and a driving wheel arranged on a web plate of the channel steel, an annular groove for the driving wheel to insert is recessed in the outer annular surface of the annular track, arc-shaped limiting strips are convexly arranged on one opposite sides of two wing plates of the channel steel, annular limiting grooves are recessed in the upper side and the lower side of the annular track, and the arc-shaped limiting strips are inserted in the corresponding annular limiting grooves and are in sliding connection with the annular track; the driving piece is arranged on the web of the channel steel, and the fixing plate moves towards the direction perpendicular to the web of the channel steel under the action of the driving piece.
Through adopting above-mentioned technical scheme for it is more stable at the removal in-process to remove the seat.
Preferably, the annular track is formed by splicing a plurality of arc-shaped guide rails.
Through adopting above-mentioned technical scheme for arranging annular track on the pile head, need not to punch on the pile head, thereby make the dismouting in-process more convenient.
Preferably, the inner arc surface of the annular track is provided with a rubber strip.
Through adopting above-mentioned technical scheme, because the appearance of bored concrete pile is only approximate cylindric, consequently, through setting up the rubber strip, because the rubber strip possesses elasticity to make installing on the pile head that the circular orbit can be firm.
Drawings
FIG. 1 is a schematic view of the present application showing the construction of a ring cutting apparatus for cutting a pile head;
FIG. 2 is a cutaway view of the ring cutting apparatus of the present application;
fig. 3 is a schematic structural diagram of a steel reinforcement cage inside a pile head after being fused in the application.
Description of reference numerals:
1. filling a pile; 11. pile head; 2. cutting a seam in a ring shape; 3. a reinforcement cage; 4. an annular track; 5. a movable seat; 51. a movable seat; 511. channel steel; 512. a drive wheel; 513. an arc-shaped limiting strip; 52. a fixing plate; 53. an electric cylinder; 6. a circular saw; 7. a ring groove; 8. annular spacing groove.
Detailed Description
The present application is described in further detail below with reference to figures 1-3.
The embodiment of the application discloses a construction method for breaking soil between piles and pile heads of a super-irrigation cast-in-place pile. The method comprises the following steps:
s1, excavating a soil layer: and excavating the soil layer by using the long-arm excavator, wherein the excavating process is carried out from the area with large pile spacing of the cast-in-place piles 1 to the area with small pile spacing of the cast-in-place piles 1. When the pile spacing of the cast-in-place pile 1 cannot accommodate the bucket of the long-arm excavator, the pile driver is used for construction instead. The drill rod is driven into the soil between the piles in the area with the small distance between the piles of the cast-in-place piles 1 by the pile driver, and the soil between the piles in the area with the small distance between the piles is removed, so that the pile head 11 of the cast-in-place pile 1 in the area with the small distance between the piles is partially exposed, and therefore, the soil between the piles in the area with the small distance between the piles is collapsed and broken under the action of the pile driver. And then, the soil body is transported to an open area of the foundation pit, and then the long-arm excavator is utilized to intensively clean the soil body.
And S2, cleaning soil adhered to the pile head 11.
S3, the pile head 11 breaking construction includes the following steps:
s31, referring to fig. 1, cutting two circular cutting seams 2 at the position of the pile head 11 near the bottom of the foundation pit by using a circular cutting device. Before cutting, a drill is used for drilling a drill hole on the peripheral wall of the pile head 11 close to the bottom of the foundation pit, in the drilling process, when the drill reaches the position of the reinforcement cage 3 in the pile head 11, the drilling is stopped, and then the drilling depth is measured by a tape measure so as to determine the cutting depth of the annular cutting seam 2 cut by the annular cutting device. When the construction of the annular cutting seams 2 is carried out, the distance between the two annular cutting seams 2 is required to be 2-3 cm, and 2.5cm is preferred.
Referring to fig. 1 and 2, the circular cutting device comprises an annular rail 4, a moving seat 5 is connected to the annular rail 4 in a sliding mode, the moving seat 5 is connected to the annular rail 4 in a sliding mode along the circumferential direction of the annular rail 4, the height of the moving seat 5 can be adjusted, and a circular saw 6 is arranged on the moving seat 5. When the pile head 11 is cut, the height of the movable base 5 is adjusted until the cutter of the circular saw 6 is close to the position of the reinforcement cage 3 while cutting concrete by the circular saw 6 according to the measured drilling depth. Then, the movable base 5 moves along the circumferential direction of the circular rail 4 according to the cutting speed of the circular saw 6, so that the circular cutting seam 2 is cut on the pile head 11, and the saw blade of the circular saw 6 does not collide with the circular saw 6 during the cutting process.
Referring to fig. 2, the inner diameter of the circular track 4 matches the diameter of the pile head 11, and a rubber strip (not shown) is bonded and fixed on the inner circular surface of the circular track 4 so as to better fit the pile head 11. Annular track 4 is formed by many arc guide rail end to end amalgamation in proper order, through fastener locking connection between two adjacent arc guide rails to need not trompil on pile head 11 and can install annular track 4 on pile head 11, it is more convenient to operate.
Referring to fig. 2, the movable base 5 includes a movable base 51 and a fixed plate 52 disposed on the movable base 51, and the movable base 51 is disposed on the circular rail 4 and slidably coupled to the circular rail 4. The movable seat 51 is provided with a driving piece for driving the fixed plate 52 to move away from or close to the movable seat 51, and the circular saw 6 is installed on the fixed plate 52.
Referring to fig. 2, the movable seat 51 includes a channel 511 and a driving wheel 512 disposed on the channel 511, the driving wheel 512 is mounted inside a web of the channel 511, and the driving wheel 512 is a driving wheel 512 with a motor and a power supply, which will not be described in detail herein. The outer circumferential surface of the circular track 4 is recessed with a circular groove 7 for inserting the roller of the driving wheel 512, and the depth of the circular groove 7 is smaller than the radius of the roller. The relative one side of two pterygoid laminas of channel-section steel 511 all is protruding to be equipped with arc spacing strip 513, and the upper and lower both sides of circular orbit 4 all are sunken to have circular spacing groove 8, and arc spacing strip 513 is pegged graft in the circular spacing groove 8 that corresponds and along circular spacing groove 8 circumference and circular orbit 4 sliding connection. By arranging the arc-shaped limiting strip 513 and the annular limiting groove 8, the movable seat 51 is more stable in the moving process.
The driving piece adopts an electric cylinder 53, the cylinder body of the electric cylinder 53 is arranged on the outer side of the web plate of the channel steel 511, the piston rod of the electric cylinder 53 is vertically and fixedly connected with a fixed plate 52, and the fixed plate 52 is parallel to the web plate of the channel steel 511. Can change the height that removes seat 5 through electric jar 53 to the position of convenient according to measuring drilling depth adjustment circular saw 6 makes the saw sword can not bump with steel reinforcement cage 3 in cutting process, thereby makes the saw sword be difficult for collapsing.
S32, after two annular cutting seams 2 are formed on the pile head 11, breaking the concrete between the two annular cutting seams 2 to expose the reinforcement cage 3 outside the pile head 11, then fusing the reinforcement cage 3 along the circumferential direction by using a welding gun, and ensuring that the width of the formed fusion seam is 1-2 cm.
S33, the pile head 11 is hung by a crane, the pile head 11 is sawed from the cast-in-place pile 1 along the fusion joint of the reinforcement cage 3 by a rope sawing machine, and the rope saw is cooled by continuously watering in the cutting process, so that the rope saw is not easy to wear. After the pile head 11 is sawn down, the pile head 11 is lifted out of the foundation pit by using a crane.
And S4, repeating the steps S2-S3 until all pile heads 11 are broken.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. A construction method for breaking soil between piles and pile heads of super-grouted cast-in-place piles is characterized in that: the method comprises the following steps:
s1, excavating a soil layer: soil layer excavation is carried out from an area with large pile spacing of the cast-in-place piles (1) to an area with small pile spacing; when the soil layer can not be directly excavated due to the fact that the distance between the piles is too small, the soil layer between the cast-in-place piles (1) is crushed by using a pile driver, then the soil body is transported to an open area of a foundation pit, and then the soil body is cleaned;
s2, cleaning soil adhered to the pile head (11);
s3, pile head (11) breaking construction:
s31, cutting two annular cutting seams (2) at the position, close to the bottom of the foundation pit, of the pile head (11) by using an annular cutting device;
s32, breaking the concrete between the two annular cutting seams (2) to expose the reinforcement cage (3), and fusing the reinforcement cage (3) along the circumferential direction by using a welding gun;
s33, hanging the pile head (11) through a crane, sawing the pile head (11) from the cast-in-place pile (1) along the fusion joint of the reinforcement cage (3), and then hanging the sawn pile head (11) out of the foundation pit;
and S4, repeating the steps S2-S3 until all pile heads (11) are broken.
2. The construction method for breaking soil and pile head between super-grouted cast-in-place piles according to claim 1, which is characterized in that: before the circular cutting device is used for cutting concrete, a drill hole is drilled on the peripheral wall of the pile head (11) close to the bottom of the foundation pit, in the drilling process, when the drill bit reaches the position of the reinforcement cage (3) in the pile head (11), the drilling is stopped, and then the drilling depth is measured so as to determine the cutting depth of the circular cutting device.
3. The construction method for breaking soil and pile head between super-grouted cast-in-place piles according to claim 1, which is characterized in that: in S31, the distance between two annular cutting seams (2) is 2-3 cm; and in S32, the width of the notch generated after the steel bar is melted is ensured to be 1-2 cm.
4. The construction method for breaking soil and pile head between super-grouted cast-in-place piles according to claim 1, which is characterized in that: the circular cutting device comprises an annular track (4), a moving seat (5) is arranged on the annular track (4) in a sliding mode, the moving seat (5) is connected with the annular track (4) in a sliding mode along the circumferential direction of the annular track (4), and a circular saw (6) is arranged on the moving seat (5).
5. The method for demolishing soil between piles and pile heads of the super-grouting pile as claimed in claim 4, wherein: remove seat (5) including sliding setting movable seat (51) on circular orbit (4) and fixed plate (52) of setting on movable seat (51), be provided with the driving piece that orders about fixed plate (52) and remove on movable seat (51), fixed plate (52) move towards the direction that is close to or deviates from movable seat (51) under the effect of driving piece, circular saw (6) are installed on fixed plate (52).
6. The construction method for breaking soil and pile head between super-irrigation cast-in-place piles according to claim 5, characterized in that: the movable seat (51) comprises a channel steel (511) and a driving wheel (512) installed on a web plate of the channel steel (511), an annular groove (7) for the driving wheel (512) to be inserted into is formed in the outer annular surface of the annular track (4), arc-shaped limiting strips (513) are convexly arranged on one sides, opposite to two wing plates, of the channel steel (511), annular limiting grooves (8) are formed in the upper side and the lower side of the annular track (4), and the arc-shaped limiting strips (513) are inserted into the corresponding annular limiting grooves (8) and are in sliding connection with the annular track (4); the driving piece is arranged on the web plate of the channel steel (511), and the fixing plate (52) moves towards the direction perpendicular to the web plate of the channel steel (511) under the action of the driving piece.
7. The method for demolishing soil between piles and pile heads of the super-grouting pile as claimed in claim 4, wherein: the annular track (4) is formed by splicing a plurality of arc-shaped guide rails.
8. The method for demolishing soil between piles and pile heads of the super-grouting pile as claimed in claim 4, wherein: and the inner arc surface of the annular track (4) is provided with a rubber strip.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210486326.4A CN114718070A (en) | 2022-05-06 | 2022-05-06 | Construction method for breaking soil between piles and pile heads of super-irrigation cast-in-place pile |
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| CN202210486326.4A CN114718070A (en) | 2022-05-06 | 2022-05-06 | Construction method for breaking soil between piles and pile heads of super-irrigation cast-in-place pile |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115142416A (en) * | 2022-08-01 | 2022-10-04 | 湖北工业大学工程技术学院 | Pile head breaking device for cast-in-place pile |
| CN116856403A (en) * | 2022-11-24 | 2023-10-10 | 灌云县侍庄水利服务站 | Pile head treatment equipment for water conservancy pile foundation and timely use method |
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