CN111980032A - Casing pipe construction equipment and method for full casing pipe secant pile - Google Patents
Casing pipe construction equipment and method for full casing pipe secant pile Download PDFInfo
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- CN111980032A CN111980032A CN202010845612.6A CN202010845612A CN111980032A CN 111980032 A CN111980032 A CN 111980032A CN 202010845612 A CN202010845612 A CN 202010845612A CN 111980032 A CN111980032 A CN 111980032A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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Abstract
The invention discloses a casing pipe construction device and a casing pipe construction method for a full-casing secant pile. The equipment comprises an inner sleeve, an outer sleeve, a connecting bearing, a bucket, a slag outlet valve, a limiting strip and cutting teeth; including the welding of sleeve pipe bottom have cut the tooth, the outer tube is connected with interior sleeve pipe through connecting the bearing, it comprises last foundation ring to connect the bearing, lower foundation ring and ring axle, go up the foundation ring and weld at interior sheathed tube outer wall with lower foundation ring, the ring axle welds the inner wall at the outer tube, the symmetrical welding in the outer tube outside has 4 buckets, the slag notch has been seted up respectively at bucket top height in outer tube and interior sleeve pipe, the slag notch valve has been arranged to outer tube slag notch inboard, spacing welding is at interior sleeve pipe slag notch upper and lower edge. When the casing pipe is used for cutting the plain concrete pile in the construction of the occlusive pile, the excavator bucket cuts two occluding grooves on the traditional arc-shaped occluding surface, so that the contact area between the reinforced concrete pile and the plain concrete pile is increased, the sealing performance of the occluded part is improved, and the impermeability of the occluded part of the occlusive pile is improved.
Description
Technical Field
The invention belongs to the field of construction equipment of foundation pit support structures, and particularly relates to casing construction equipment of a full casing secant pile.
Background
And (3) constructing the all-casing secant pile, firstly, drilling the casing into the pile position by using an all-rotary drilling machine, keeping the bottom of the casing ahead of the excavation surface of the hole drilling machine, forming a hole to a designed depth, cleaning sediments at the bottom of the hole, and then pouring plain concrete to form the plain concrete pile. After plain concrete piles are constructed at intervals, before concrete of the plain concrete piles is initially set, the full-slewing drilling machine is used for cutting the adjacent plain concrete piles by using a sleeve, staggered concrete parts, namely an occlusion structure, are formed after pore-forming concrete pouring, and then the steel reinforcement cage is inserted into a concrete pile body once by means of the self weight of the steel reinforcement cage or a special vibration device to form the reinforced concrete piles. After repeated construction, row piles with plain concrete piles and reinforced concrete piles arranged at intervals and meshed with each other are formed.
Compared with the traditional cast-in-situ bored pile and underground continuous wall, the full-casing secant pile has the advantages of strong seepage-proofing capability, no need of slurry retaining wall and low construction cost, but because the underground structure construction is complicated, the concrete pouring of plain concrete piles and reinforced concrete piles has time difference, cracks or gaps can be caused on the secant surface, and the seepage-proofing performance of the secant surface is influenced.
Disclosure of Invention
The invention aims to provide casing pipe construction equipment for a full casing pipe occlusive pile.
The technical scheme adopted by the invention for solving the specific technical problems is as follows:
the sleeve construction equipment of the full-sleeve occlusive pile comprises an inner sleeve and an outer sleeve which are coaxially arranged; the cutting teeth are fixed at the lowest end of the inner sleeve and are lower than the bottom of the outer sleeve in height; the outer sleeve is matched and connected with the inner sleeve through a connecting bearing, and the outer sleeve and the inner sleeve can rotate relatively but have no freedom of movement in the axial direction; a plurality of buckets are uniformly fixed on the outer side wall of the outer sleeve at the same height along the circumferential direction, and the excavation openings of the buckets are arranged downwards; the outer sleeve is provided with first slag outlets communicated with the outlets of the buckets at the outlet of each bucket, and the inner sleeve is provided with second slag outlets with the same number as the first slag outlets at the same height of the first slag outlets; a slag hole valve is arranged on the inner side of each first slag hole and can be attached to the inner wall of the outer sleeve to move up and down so as to control the opening and closing of the slag hole in the outer sleeve;
the upper edge and the lower edge of the second slag outlet are respectively provided with a transverse upper limiting strip and a transverse lower limiting strip, the upper limiting strip and the lower limiting strip both protrude out of the outer wall of the inner sleeve, and the outer side surface of the upper limiting strip and the lower limiting strip is attached to the inner wall of the outer sleeve;
go up the height range that highly is located the slag notch valve of spacing, make interior sleeve pipe for the rotatory in-process of outer tube, every goes up spacing in the stroke with the contact of slag notch valve, can promote the promotion of slag notch valve to open first slag notch to communicate in order by bucket, first slag notch, lower spacing and second slag notch and form the passageway of slagging tap, after last spacing breaks away from the contact with the slag notch valve, the slag notch valve falls down again and closes first slag notch.
Preferably, the connecting bearing comprises an upper bottom ring, a lower bottom ring and a shaft ring, the upper bottom ring and the lower bottom ring are horizontally fixed on the outer wall of the inner sleeve, the shaft ring is horizontally fixed on the inner wall of the outer sleeve, and the shaft ring is limited by the upper bottom ring and the lower bottom ring, so that the shaft ring can horizontally rotate but has no vertical movement freedom degree.
Preferably, inclined struts are arranged between the upper bottom ring and the outer wall of the inner sleeve for reinforcement.
Preferably, the connecting bearing is a thrust roller bearing.
Preferably, the bottom of the bucket is 2-3 m higher than the bottom of the inner sleeve.
Preferably, the top of the bucket is an inclined surface to guide the dregs in the bucket to move to the outlet.
Preferably, the slag hole valve is an arc metal sheet with vertical movable grooves on two sides, the top side of the arc metal sheet is a horizontal edge, the bottom side of the arc metal sheet is a bevel edge, and the arc metal sheet is fixed on the inner wall of the outer sleeve by inserting limit bolts with the diameter smaller than the width of the movable grooves into the movable grooves on the two sides.
Preferably, the first slag outlet and the second slag outlet are the same in shape and size, and the lower limiting strip transversely covers the bottom edge of the whole second slag outlet.
Preferably, the number of the buckets, the number of the first slag outlet and the number of the second slag outlet are all 4, and the buckets, the first slag outlet and the second slag outlet are all distributed along the circumferential direction at equal angles.
Another object of the present invention is to provide a method for constructing an occlusive pile with an occlusion groove using the casing pipe construction equipment according to any of the above aspects, comprising the steps of:
s1: firstly, arranging plain pile holes in a foundation according to a design, drilling the holes to a designed pile bottom elevation, and pouring concrete into the plain pile holes to the designed elevation to form plain concrete piles;
s2: vertically placing the casing pipe construction equipment at a design position between two adjacent vegetable concrete piles, and opening meat pile holes; in the opening process, downward pressure is applied to the inner sleeve 1 through the power head, the inner sleeve 1 is driven to rotate continuously, the cutting teeth at the bottom of the inner sleeve are utilized to drill into a soil body, the outer sleeve is kept still in the drilling process, the excavator bucket on the outer sleeve vertically cuts the soil body, and vertical occlusion grooves are cut on the occlusion surfaces of two plain concrete piles; when the inner sleeve rotates, the second slag outlet of the inner sleeve and the first slag outlet of the outer sleeve are alternately overlapped and staggered; when the second slag hole and the first slag hole are not overlapped, the slag hole valve is completely lowered to seal the first slag hole, when the inner sleeve rotates to the state that the second slag hole and the first slag hole are close to coincide, the upper limit strip on the upper side of the second slag hole can jack up the slag hole valve along the bevel edge of the lower side of the slag hole valve, so that the second slag hole is opened to enable the second slag hole and the first slag hole to be overlapped, the slag soil continuously entering the bucket pushes the slag soil above the slag hole to enter the inner sleeve along the second slag hole, and the lower limit strip on the lower side of the second slag hole can extend into the lower side of the first slag hole to prevent the slag soil from falling from a gap between the inner sleeve and the outer sleeve; along with the continuous rotation of the inner sleeve, the upper limit strip on the upper side of the second slag hole is separated from the slag hole valve, and the slag hole valve falls down to close the first slag hole again; the process is repeated along with the rotation of the inner sleeve, so that the slag in the bucket continuously enters the inner sleeve through the slag outlet and is taken out of the ground by the drilling machine; stopping drilling when the pile hole reaches the designed pile bottom elevation;
s3: grouting the meat pile hole, pouring concrete in the meat pile hole to a designed elevation, and inserting the reinforcement cage into the concrete once to the designed elevation to form a reinforced concrete pile;
s4: and (3) continuously performing construction from S1 to S3 on the whole construction plane according to the designed pile positions to form meat and vegetable occlusive piles, wherein an occlusive surface with rectangular occlusive slots is formed between the occlusive piles.
According to the scheme, when the casing pipe is used for cutting the plain concrete pile in the construction of the occlusive pile, the excavator bucket is used for cutting two occluding grooves on the traditional arc-shaped occluding surface. According to the invention, while the rotary drilling of the traditional casing is maintained, the protruded occlusal surface is vertically cut, the occlusal length of the plain concrete pile and the reinforced concrete pile is prolonged, the occlusal area of the plain concrete pile and the reinforced concrete pile is increased, and the probability of cracks penetrating through the entire occlusal surface is reduced, so that the airtightness of the occlusal surface is improved, and the occurrence of leakage at the occlusal surface of the occlusal pile is prevented.
Drawings
FIG. 1 is a top plan view of a casing construction apparatus for a full casing bite pile;
FIG. 2 is an isometric view of the inner sleeve;
FIG. 3 is a sectional view taken along line 1-1 of the slag hole door in a fully raised condition;
FIG. 4 is a sectional view taken along line 1-1 of the tap hole valve in a fully lowered condition;
FIG. 5 is a front view of the slag notch door;
fig. 6 is a schematic view of the occlusal surface of the occlusive pile after construction using the invention.
In the figure: the device comprises an inner sleeve 1, an outer sleeve 2, a connecting bearing 3, a bucket 4, a slag hole valve 5, a first slag hole 6, a cutting tooth 7, an upper base ring 8, a lower base ring 9, a shaft ring 10, an upper limiting strip 11, a lower limiting strip 12, an inclined strut 13, a limiting bolt 14, a movable groove 15, a second slag hole 16, a plain concrete pile 17, a reinforced concrete pile 18, an occlusion surface 20 and an occlusion groove 21.
Detailed Description
The invention will be further elucidated and described with reference to the drawings and the detailed description. The technical features of the embodiments of the present invention can be combined correspondingly without mutual conflict.
The technical solution in the embodiments of the present invention is implemented by referring to the drawings and the specific embodiments
Clearly, and fully, it is to be understood that the embodiments described are merely illustrative of some, but not all, embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 3, the casing construction equipment for a full casing secant pile in the present embodiment is composed of an inner casing 1, an outer casing 2, a connecting bearing 3, a bucket 4, a slag hole valve 5, a first slag hole 6, a cutting tooth 7, an upper base ring 8, a lower base ring 9, a shaft ring 10, an upper limiting strip 11, a lower limiting strip 12, an inclined strut 13, a valve limiting bolt 14, a movable groove 15, and a second slag hole 16.
As shown in fig. 1, the inner sleeve 1 and the outer sleeve 2 are both a cylinder without top and cover, and are arranged coaxially, and the height of the outer sleeve 2 is smaller than that of the inner sleeve 1 as a whole.
As shown in figure 2, a circle of cutting teeth 7 is fixed at the lowest end of the inner sleeve 1, the bottom of the inner sleeve 1 extends out of the outer sleeve 2, and the height of the cutting teeth 7 is lower than that of the bottom of the outer sleeve 2. During the rotation of the inner casing 1, the cutting teeth 7 can cut and crush soil, so that the soil can be taken out of the ground by the drilling machine. The outer sleeve 2 is coupled to the inner sleeve 1 via a coupling bearing 3, and both are relatively rotatable but have no freedom of movement in the axial direction and cannot move up and down relatively. The outer wall of the inner sleeve 1 is provided with 4 symmetrically distributed second slag outlets 16 at equal intervals along the circumferential direction, and the 4 second slag outlets 16 are distributed along the circumferential direction of the outer sleeve 2 at equal angles. The upper and lower edges of the outer side of each second slag outlet 16 are horizontally welded with an upper limiting strip 11 and a lower limiting strip 12 which have the same length as the slag outlet 16. Go up spacing 11 and lower spacing 12 and all outstanding outer wall of interior sleeve pipe 1, and the outstanding height equals with the clearance thickness between interior sleeve pipe 1 and the outer tube 2 for the lateral surface of going up spacing 11 and lower spacing 12 can laminate the inner wall of outer tube 2 and slide. The lower limit strip 12 is used to form a blocking part between the inner sleeve 1 and the outer sleeve 2 to prevent the slag from falling into the gap between the inner sleeve and the outer sleeve, so that the lower limit strip 12 needs to transversely cover the bottom edge of the whole second slag outlet 16, and the length of the lower limit strip is equal to or slightly longer than the bottom edge.
Referring to fig. 3, a plurality of buckets 4 are uniformly fixed on the outer side wall of the outer sleeve 2 at the same height along the circumferential direction, and the positions and the number of the buckets 4 need to be determined according to the number of the meshing grooves, which is equal to the number of the second slag outlets 16. In the embodiment, 4 buckets 4 are symmetrically welded on the outer wall of the outer sleeve 2. The digging opening of the bucket 4 is arranged downwards, and the edge of the digging opening is processed into a sharp shape. The outer sleeve 2 is provided with a first slag outlet 6 at the outlet of each bucket 4, which is coincidently communicated with the outlet of the bucket 4, so that the number of the first slag outlets 6 in the embodiment is 4. The first slag hole 6 on the outer sleeve 2 is consistent in height with the second slag hole 16 on the inner sleeve 1, and the shape and the size are the same, so that the two can be overlapped in the rotating process. A slag hole valve 5 is arranged on the inner side of each first slag hole 6, and the slag hole valve 5 can be attached to the inner wall of the outer sleeve 2 and can move up and down to control the opening and closing of the slag hole on the outer sleeve 2.
In the present invention, the lifting of the tap hole door 5 is driven by upper and lower limit bars 11, 12 at the upper and lower edges of the second tap hole 16. Referring to fig. 5, the slag hole valve 5 is a circular arc metal sheet with vertical movable grooves 15 on both sides, and the radian of the circular arc metal sheet is the same as that of the inner wall of the outer sleeve 2, so that the two can be attached. The top side of the arc metal sheet is a horizontal side, the bottom side of the arc metal sheet is a bevel side which inclines downwards, and two sides of the arc metal sheet are provided with vertical movable grooves 15. And limiting bolts 14 with the diameter smaller than the width of the movable groove are inserted into the movable grooves 15 on the two sides, and the arc metal sheet is fixed on the inner wall of the outer sleeve 2 by the limiting bolts 14, but a small gap is left, so that the outer sleeve can slide up and down. Because the upper limit strip 11 and the lower limit strip 12 both protrude out of the outer wall of the inner sleeve 1, the upper limit strip and the lower limit strip can be used for driving the slag hole valve 5 to ascend and descend. In particular, the upper limit strips 11 are located at a height within the height of the bevelled edge of the tap hole door 5, so that each upper limit strip 11 is in contact with the bevelled edge of the tap hole door 5 during rotation of the inner sleeve 1 relative to the outer sleeve 2. In this embodiment the height of the upper limit strip 11 is the same as the height of the top of the bevel edge when the tap hole door 5 is fully lowered. Therefore, in a section of stroke in which the upper limit strip 11 is contacted with the bevel edge of the slag hole valve 5, the upper limit strip 11 and the bevel edge jointly generate an upper thrust force to push the slag hole valve 5 to lift so as to open the first slag hole 6. After the first slag outlet 6 is opened, a slag discharging channel is formed by sequentially communicating the bucket 4, the first slag outlet 6, the lower limit strip 12 and the second slag outlet 16. At this point, the dirt in the bucket 4 can enter the inner casing 1 through the slag outlet 16 and be carried out of the ground by the drilling machine. However, when the upper limit strip 11 continues to rotate and is separated from the slag hole valve 5, the slag hole valve 5 falls down again to close the first slag hole 6 under the action of self gravity, so that the slag soil is prevented from falling into the gap between the inner sleeve and the outer sleeve. Fig. 3 is a state that the slag hole valve 5 is completely raised to open the first slag hole 6, and at this time, the slag can pass through the first slag hole 6, and fig. 4 is a state that the slag hole valve 5 is completely lowered to close the first slag hole 6, and at this time, the slag cannot pass through the first slag hole 6.
The structure of the connection bearing 3 in the present invention can be adjusted according to actual conditions as long as it satisfies the corresponding function. Referring to fig. 3, in the present embodiment, the connecting bearing 3 is composed of an upper bottom ring 8, a lower bottom ring 9 and a shaft ring 10, the upper bottom ring 8 and the lower bottom ring 9 are horizontally fixed on the outer wall of the inner sleeve 1, the shaft ring 10 is horizontally fixed on the inner wall of the outer sleeve 2, and the shaft ring 10 is limited by the upper bottom ring 8 and the lower bottom ring 9, so that it can rotate horizontally but has no vertical movement freedom. In order to further enhance the stability of the fixation, inclined struts 13 may be respectively disposed between the upper bottom ring 8, the lower bottom ring 9 and the outer wall of the inner sleeve 1 for reinforcement. In addition, the connecting bearing 3 uses a thrust roller bearing, which has small occupied space and high rigidity and can bear the axial heavy load between the inner sleeve 1 and the outer sleeve 2, the outer sleeve 2 is maintained in a non-rotating state when the inner sleeve 1 rotates, and the outer sleeve 2 only synchronously and vertically moves along with the inner sleeve 1.
Because interior sleeve pipe 1 and outer tube 2 are connected by connecting bearing 3, only transmit vertical load, when interior sleeve pipe 1 rotatoryly drilling downwards, can not drive outer tube 2 rotatory, outer tube 2 is along with interior sleeve pipe 1 vertical movement downwards, and the bucket 4 cuts the plain concrete pile 17 formation arc occlusal surface 20 of cutting by interior sleeve pipe 1 along with the downward movement of outer tube 2, cuts out the rectangle occlusal groove, and the dregs after the cutting arrive the slag notch 16 on the outer tube 2 along the bucket. As shown in fig. 6, an engagement surface 20 having a rectangular engagement groove 21 is finally formed between the plain concrete pile 17 and the reinforced concrete pile 18.
In addition, the bottom of the bucket 4 is 2 m-3 m higher than the bottom of the inner sleeve 1 so as to ensure that the excavation surface of the inner sleeve is always 2 m-3 m lower than the excavation surface of the bucket. The inner top surface of bucket 4 is preferably designed as an inclined surface to guide the movement of the sludge in bucket 4 toward the outlet.
Based on the casing pipe construction equipment, a construction method of the occlusive pile with the occlusion groove can be further provided, and the steps are as follows:
s1: firstly, a plain pile hole is formed in a foundation according to the design, after a hole is drilled to the designed pile bottom elevation, concrete is poured into the plain pile hole to the designed elevation, and a plain concrete pile 17 is formed.
S2: the casing pipe construction equipment is vertically placed at a designed position between two adjacent vegetable concrete piles 17, and a pile hole is formed.
In the opening process, downward pressure is applied to the inner sleeve 1 through the power head, the inner sleeve 1 is driven to rotate continuously, the cutting teeth 7 at the bottom of the inner sleeve are utilized to drill into a soil body, the outer sleeve 2 is kept still in the drilling process, the excavator bucket 4 on the outer sleeve 2 vertically cuts the soil body, and vertical occlusion grooves are cut on occlusion surfaces of two plain concrete piles 17; when the inner sleeve 1 rotates, the second slag outlet 16 of the inner sleeve 1 and the first slag outlet 6 of the outer sleeve 2 are alternately overlapped and staggered; when the second slag hole 16 and the first slag hole 6 are not overlapped, the slag hole valve 5 is completely lowered to close the first slag hole 6, when the inner sleeve 1 rotates until the second slag hole 16 and the first slag hole 6 are approximately overlapped, the upper limit strip 11 on the upper side of the second slag hole 16 can jack up the slag hole valve 5 along the bevel edge of the lower side of the slag hole valve 5, so that the second slag hole 16 is opened, the second slag hole 16 and the first slag hole 6 are overlapped, the slag soil continuously entering the bucket 4 pushes the upper slag hole to enter the inner sleeve 1 along the second slag hole 16, and the lower limit strip 12 on the lower side of the second slag hole 16 can extend into the lower side of the first slag hole 6 to prevent the slag soil from falling from a gap between the inner sleeve 1 and the outer sleeve 2; with the continuous rotation of the inner sleeve 1, the upper limit strip 11 on the upper side of the second slag outlet 16 is separated from the slag outlet valve 5, and the slag outlet valve 5 falls down to close the first slag outlet 6 again; the process is repeated along with the rotation of the inner sleeve 1, so that the slag in the bucket 4 continuously enters the inner sleeve 1 through the slag outlet 16 and is taken out of the ground by the drilling machine; and stopping drilling when the pile hole reaches the designed pile bottom elevation.
S3: grouting the meat pile hole, pouring concrete in the meat pile hole to the designed elevation, and inserting the reinforcement cage into the concrete once to the designed elevation by means of the self weight of the reinforcement cage or a special vibration device to form the reinforced concrete pile 18. The meat-vegetable snap pile unit obtained at this time is shown in fig. 6.
S4: and (4) continuously carrying out construction from S1 to S3 on the whole construction plane according to the designed pile position to form the final occlusive pile. The interlocking pile is formed by alternately arranging and interlocking vegetable piles and meat piles in sequence, and the pile diameter, the reinforcement ratio and the interlocking thickness of the meat piles and the vegetable piles are designed according to the actual requirement.
The above-described embodiments are merely preferred embodiments of the present invention, which should not be construed as limiting the invention. Various changes and modifications may be made by one of ordinary skill in the pertinent art without departing from the spirit and scope of the present invention. Therefore, the technical scheme obtained by adopting the mode of equivalent replacement or equivalent transformation is within the protection scope of the invention.
Claims (10)
1. The casing construction equipment of the full-casing occlusive pile is characterized by comprising an inner casing (1) and an outer casing (2) which are coaxially arranged; the cutting teeth (7) are fixed at the lowest end of the inner sleeve (1), and the cutting teeth (7) are lower than the bottom of the outer sleeve (2); the outer sleeve (2) is matched and connected with the inner sleeve (1) through a connecting bearing (3), and the outer sleeve and the inner sleeve can rotate relatively but have no freedom of movement in the axial direction; a plurality of buckets (4) are uniformly fixed on the outer side wall of the outer sleeve (2) at the same height along the circumferential direction, and excavation openings of the buckets (4) are arranged downwards; the outer sleeve (2) is provided with a first slag outlet (6) communicated with the outlet of each bucket (4) at the outlet of each bucket (4), and the inner sleeve (1) is provided with second slag outlets (16) with the same number as the first slag outlets (6) at the same height of the first slag outlets (6); a slag hole valve (5) is arranged on the inner side of each first slag hole (6), and the slag hole valve (5) can be attached to the inner wall of the outer sleeve (2) to move up and down to control the opening and closing of the slag hole in the outer sleeve (2);
the upper edge and the lower edge of the second slag outlet (16) are respectively provided with a transverse upper limiting strip (11) and a transverse lower limiting strip (12), the upper limiting strip (11) and the lower limiting strip (12) both protrude out of the outer wall of the inner sleeve (1), and the outer side surface is attached to the inner wall of the outer sleeve (2);
go up the altitude range that highly is located slag notch valve (5) of spacing (11), make interior sleeve pipe (1) for outer tube (2) rotatory in-process, every goes up spacing (11) in the stroke with slag notch valve (5) contact, can promote slag notch valve (5) promote, in order to open first slag notch (6) to by digging bucket (4), first slag notch (6), lower spacing (12) and second slag notch (16) intercommunication in order form the passageway of slagging tap, after last spacing (11) breaks away from the contact with slag notch valve (5), first slag notch (6) are closed again to slag notch valve (5) fall down.
2. The casing construction equipment for a full-casing occlusive pile according to claim 1, wherein the connecting bearing (3) is composed of an upper bottom ring (8), a lower bottom ring (9) and a shaft ring (10), the upper bottom ring (8) and the lower bottom ring (9) are horizontally fixed on the outer wall of the inner casing (1), the shaft ring (10) is horizontally fixed on the inner wall of the outer casing (2), and the shaft ring (10) is limited by the upper bottom ring (8) and the lower bottom ring (9) so as to enable the shaft ring to horizontally rotate without vertical movement freedom.
3. The casing construction equipment for a full-casing occlusive pile according to claim 2, characterized in that inclined struts (13) are respectively arranged between the upper bottom ring (8), the lower bottom ring (9) and the outer wall of the inner casing (1) for reinforcement.
4. The casing construction equipment for a full casing bite pile according to claim 1, wherein the connection bearing (3) uses a thrust roller bearing.
5. The casing construction equipment for a full casing bite pile according to claim 1, wherein the bottom of the bucket (4) is 2 to 3m higher than the bottom of the inner casing (1).
6. Casing pipe construction equipment for a full casing bite pile according to claim 1, wherein the top of the bucket (4) is inclined to guide the movement of the dregs in the bucket (4) toward the outlet.
7. The casing construction equipment for a full casing occlusive pile according to claim 1, wherein the slag hole valve (5) is a circular arc metal sheet with vertical movable grooves (15) on both sides, the top side of the circular arc metal sheet is a horizontal edge, the bottom side of the circular arc metal sheet is a bevel edge, and the circular arc metal sheet is fixed on the inner wall of the outer casing (2) by inserting limit bolts (14) with the diameter smaller than the width of the movable grooves into the movable grooves (15) on both sides.
8. Casing construction equipment for a full casing bite pile according to claim 1, characterized in that the first slag outlet (6) and the second slag outlet (16) are of the same shape and size, and the lower limit strip (12) laterally covers the whole bottom edge of the second slag outlet (16).
9. Casing construction equipment for a full casing bite pile according to claim 1, characterised in that the number of buckets (4), first slag outlets (6) and second slag outlets (16) is 4 each, all equally angularly distributed in the circumferential direction.
10. A method for constructing a bite pile with a bite groove using the casing pipe construction equipment according to any one of claims 1 to 9, comprising the steps of:
s1: firstly, a plain pile hole is formed in a foundation according to the design, after a hole is drilled to the designed pile bottom elevation, concrete is poured into the plain pile hole to the designed elevation, and a plain concrete pile (17) is formed;
s2: vertically placing the casing pipe construction equipment at a design position between two adjacent vegetable concrete piles (17) to open a pile hole; in the opening process, downward pressure is applied to the inner sleeve 1 through the power head, the inner sleeve 1 is driven to rotate continuously, the cutting teeth (7) at the bottom of the inner sleeve are utilized to drill into a soil body, the outer sleeve (2) is kept still in the drilling process, the excavator bucket (4) on the outer sleeve (2) vertically cuts the soil body, and vertical occlusion grooves are cut on the occlusion surfaces of two plain concrete piles (17); when the inner sleeve (1) rotates, the second slag outlet (16) of the inner sleeve (1) and the first slag outlet (6) of the outer sleeve (2) are alternately overlapped and staggered; when the second slag hole (16) is not coincident with the first slag hole (6), the slag hole valve (5) is completely lowered to seal the first slag hole (6), when the inner sleeve (1) is rotated until the second slag hole (16) and the first slag hole (6) are approximately coincident, the upper limit strip (11) at the upper side of the second slag outlet (16) can jack up the slag outlet valve (5) along the bevel edge at the lower side of the slag outlet valve (5), thereby opening the second slag outlet (16), leading the second slag outlet (16) to be superposed with the first slag outlet (6), leading the slag soil continuously entering the bucket (4) to push the upper slag soil to enter the inner sleeve (1) along the second slag outlet (16), the lower limiting strip (12) at the lower side of the second slag outlet (16) can extend into the lower side of the first slag outlet (6) to prevent the slag soil from falling from a gap between the inner sleeve (1) and the outer sleeve (2); with the continuous rotation of the inner sleeve (1), the upper limit strip (11) at the upper side of the second slag hole (16) is separated from the slag hole valve (5), and the slag hole valve (5) falls down to close the first slag hole (6) again; the process is repeated along with the rotation of the inner sleeve (1), so that the slag in the bucket (4) continuously enters the inner sleeve (1) through the slag outlet (16) and is taken out of the ground by the drilling machine; stopping drilling when the pile hole reaches the designed pile bottom elevation;
s3: grouting the pile holes of the meat, after pouring concrete in the pile holes of the meat to the designed elevation, inserting the reinforcement cage into the concrete once to the designed elevation to form a reinforced concrete pile (18);
s4: and (3) continuously performing construction from S1 to S3 on the whole construction plane according to the designed pile positions to form meat and vegetable occlusive piles, wherein an occlusive surface (20) with rectangular occlusive slots (21) is formed between the occlusive piles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010845612.6A CN111980032A (en) | 2020-08-20 | 2020-08-20 | Casing pipe construction equipment and method for full casing pipe secant pile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010845612.6A CN111980032A (en) | 2020-08-20 | 2020-08-20 | Casing pipe construction equipment and method for full casing pipe secant pile |
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| CN111980032A true CN111980032A (en) | 2020-11-24 |
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| CN202010845612.6A Pending CN111980032A (en) | 2020-08-20 | 2020-08-20 | Casing pipe construction equipment and method for full casing pipe secant pile |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113089679A (en) * | 2021-04-15 | 2021-07-09 | 中铁隧道局集团有限公司 | Method for preventing muck from accumulating on upper surface of foundation pit supporting beam |
| CN115434331A (en) * | 2022-09-24 | 2022-12-06 | 中铁广州工程局集团第三工程有限公司 | Bridge foundation pit steel pipe pile support and double-liquid grouting curtain water stop construction method |
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2020
- 2020-08-20 CN CN202010845612.6A patent/CN111980032A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113089679A (en) * | 2021-04-15 | 2021-07-09 | 中铁隧道局集团有限公司 | Method for preventing muck from accumulating on upper surface of foundation pit supporting beam |
| CN115434331A (en) * | 2022-09-24 | 2022-12-06 | 中铁广州工程局集团第三工程有限公司 | Bridge foundation pit steel pipe pile support and double-liquid grouting curtain water stop construction method |
| CN115434331B (en) * | 2022-09-24 | 2024-04-05 | 中铁广州工程局集团第三工程有限公司 | Bridge foundation pit steel pipe pile support and double-liquid grouting curtain water stop construction method |
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