CN115012403A - Hole wall treatment device and method for cast-in-place pile - Google Patents
Hole wall treatment device and method for cast-in-place pile Download PDFInfo
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- CN115012403A CN115012403A CN202210742838.2A CN202210742838A CN115012403A CN 115012403 A CN115012403 A CN 115012403A CN 202210742838 A CN202210742838 A CN 202210742838A CN 115012403 A CN115012403 A CN 115012403A
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- 230000007246 mechanism Effects 0.000 claims abstract description 123
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 53
- 239000010959 steel Substances 0.000 claims abstract description 53
- 239000011241 protective layer Substances 0.000 claims abstract description 17
- 238000005553 drilling Methods 0.000 claims description 49
- 230000001681 protective effect Effects 0.000 claims description 21
- 239000002002 slurry Substances 0.000 claims description 20
- 210000000078 claw Anatomy 0.000 claims description 14
- 239000004567 concrete Substances 0.000 claims description 14
- 238000003780 insertion Methods 0.000 claims description 10
- 230000037431 insertion Effects 0.000 claims description 10
- 239000011148 porous material Substances 0.000 claims description 9
- 238000005086 pumping Methods 0.000 claims description 9
- 230000002787 reinforcement Effects 0.000 claims description 9
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- 235000017166 Bambusa arundinacea Nutrition 0.000 description 5
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- 235000015334 Phyllostachys viridis Nutrition 0.000 description 5
- 239000011425 bamboo Substances 0.000 description 5
- 238000003672 processing method Methods 0.000 description 5
- 241000209094 Oryza Species 0.000 description 4
- 235000007164 Oryza sativa Nutrition 0.000 description 4
- 235000009566 rice Nutrition 0.000 description 4
- 239000004568 cement Substances 0.000 description 3
- 230000008602 contraction Effects 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
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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
- E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
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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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/66—Mould-pipes or other moulds
- E02D5/68—Mould-pipes or other moulds for making bulkheads or elements thereof
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention relates to the technical field of cast-in-place piles, in particular to a hole wall treatment device and a hole wall treatment method of a cast-in-place pile, which comprise the following steps: the device comprises a drill rod, a steel casing, a chip mounting mechanism and a feeding mechanism; when a drill rod is drilled, the hole wall protection pieces are sequentially paved on the inner wall of the pile hole below the steel protection cylinder from shallow to deep layer by the chip mounting mechanism to form the protective layer, and the spring pieces are sequentially arranged on the inner side of the hole wall protection pieces by the feeding mechanism from top to bottom according to the paving depth of the protective layer and are used for limiting the hole wall protection pieces at the same height on the inner wall of the pile hole; the plurality of hole wall protection pieces form a protection layer, and can play a role in supporting a soil layer structure on the inner side of the hole wall to prevent the soil layer from collapsing so as to keep the stability of a pile hole structure.
Description
Technical Field
The invention relates to the technical field of cast-in-place piles, in particular to a hole wall processing device and method of a cast-in-place pile.
Background
The cast-in-situ bored pile is a pile which is made by forming a pile hole in foundation soil through mechanical drilling, steel pipe soil squeezing or manual excavation and the like on an engineering site, placing a reinforcement cage and pouring concrete in the pile hole, wherein the key of failure of drilling is to prevent the hole wall from collapsing, and when the drilling is deep, hole wall soil below an underground water level can collapse into the hole under hydrostatic pressure and even generate sand flowing.
Generally, before drilling construction, a steel casing is driven into a hole position, however, the height of the steel casing is limited, and the protection effect on the hole wall below the casing cannot be achieved, so that wall protection is performed in a cement slurry pouring mode at present, but in some soft sandy soil layers, the drilling speed is relatively high, the density of the cement slurry is low, or the formation of the cement slurry wall protection is slow, so that the hole wall slowly seeps water, the collapse condition occurs, clay needs to be backfilled, repair measures are performed, and the construction speed of the cast-in-place pile is seriously slowed down.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a hole wall processing device of a cast-in-place pile, which comprises: the bottom end of the drill rod is provided with a rotatable drill bit, and drilling operation is carried out under the driving of a drilling machine; the slurry conveying pipe is arranged at the top of the drill rod, is connected with an external negative pressure device and is used for pumping slurry generated in drilling; the steel casing is arranged at the upper end of the pile hole;
the chip mounting mechanism is arranged on the outer side wall of the drill rod and can move up and down along a track on the outer wall of the drill rod;
the feeding mechanism is arranged on the outer side wall of the drill rod, can move up and down along a track on the outer wall of the drill rod and is positioned above the surface mounting mechanism;
the protective layer is arranged on the inner wall of the pile hole, is positioned below the steel casing and is surrounded by a plurality of hole wall protective sheets;
the spring piece is arranged on the inner side wall of the protective layer and used for supporting the hole wall protective piece so as to maintain the position state of the protective layer;
when the drill rod drills, the hole wall protection pieces are sequentially paved on the surface mounting mechanism from shallow to deep layer by layer to form the protective layer on the inner wall of the pile hole below the steel protection cylinder, the laying depth of the protective layer is determined, the spring pieces are sequentially paved from top to bottom, the feeding mechanism is arranged on the inner side of the hole wall protection pieces, and the hole wall protection pieces are used for limiting the hole wall protection pieces at the same height on the inner wall of the pile hole.
Further, paster mechanism is including can first railcar of walking on the track and fixing hydraulic telescoping rod on the first railcar, hydraulic telescoping rod's output is equipped with and is used for loading the guard sheet seat of pore wall guard sheet, just hydraulic telescoping rod drive the guard sheet seat is at the downthehole radial horizontal motion of stake.
Furthermore, the hole wall protection sheet is arc-shaped plate-shaped, the radius of a pile hole is defined as r, and the arc length of the hole wall protection sheet is pi/2 r.
Furthermore, the hole wall processing device comprises four chip mounting mechanisms, wherein two opposite chip mounting mechanisms are taken as one group, and the distance between the two groups of chip mounting mechanisms in the height direction is equal to the height of the hole wall protection sheet;
the four tracks corresponding to the four patch mechanisms are arranged in central symmetry.
Further, the feeding mechanism comprises a second rail car capable of walking on the rail and a claw arm fixed on the periphery of the second rail car, and a clamping jaw used for clamping/releasing the spring piece is arranged at the end of the claw arm.
Furthermore, all install the electron meter rice ware that is used for measuring the depth of place on paster mechanism and the feeding mechanism, electron meter rice ware and external power source electric connection.
Furthermore, the upper end and the lower end of the outer side wall of the hole wall protection piece are respectively provided with a convex positioning insertion shaft, a vacuum chuck is arranged on the binding surface of the protection piece seat and the hole wall protection piece, and the vacuum chuck is electrically connected with an external power supply.
Furthermore, the outer side wall of the hole wall protection piece is provided with a convex friction rib, the inner side wall of the hole wall protection piece is provided with a convex insertion shaft group, and the binding surface of the protection piece seat and the hole wall protection piece is provided with a bearing insertion hole matched with the insertion shaft group.
Further, the hole wall protection sheet is a prefabricated reinforced concrete plate.
The invention provides another technical scheme, and a hole wall treatment method of a cast-in-place pile comprises the following steps:
step S1, preparing a protective sheet: defining the radius of a pile hole as r, placing a steel bar framework in a mould, and pouring concrete to form a hole wall protection sheet with the arc length of pi/2 r;
step S2, drilling: placing a steel casing at a preset hole position, driving a drill rod to vertically drill downwards at the preset hole position through a drill bit at the bottom end of the drill rod by a drilling machine, and pumping out slurry by using a slurry conveying pipe while drilling;
step S3, paving protection pieces: when the drilling depth is below a steel casing, the chip mounting mechanism starts to work, the initial position of the chip mounting mechanism is on a track on the outer wall of the drill rod and above the steel casing, after a worker places a prefabricated hole wall protection chip on a protection chip seat, a first railcar moves downwards along the track to the position below the steel casing, and then a hydraulic telescopic rod extrudes the protection chip seat with the hole wall protection chip towards the hole wall to enable the hole wall protection chip to be laid on the hole wall;
the device comprises a drill rod, a hole wall guard sheet, two groups of chip mounting mechanisms, an electronic meter counter, a plurality of electronic meter counters and a plurality of chip mounting mechanisms, wherein the chip mounting mechanisms are arranged into two groups which are distributed in a vertically staggered mode, the distance between the upper group and the lower group is the height of the hole wall guard sheet, each group is provided with two chip mounting mechanisms which are symmetrically distributed on two sides of the drill rod, each group of chip mounting mechanisms simultaneously paves and attaches two hole wall guard sheets at opposite positions, the two groups of chip mounting mechanisms complete paving work of two layers of hole wall guard sheets which are adjacent vertically every two times when lifting, and the lifting height of each chip mounting mechanism is fed back by the electronic meter counter so that the paving position of the hole wall guard sheet is accurate;
step S4, fixing the guard piece: after the hole wall protection pieces are paved for two layers, the feeding mechanism starts to work, the initial position of the feeding mechanism is above the surface mounting mechanism, a spring piece is placed on the clamping jaw by a worker to be clamped and fixed, then the second rail car drives the clamping jaw to move downwards to the height position of the hole wall protection piece through the jaw arm to stop, the spring piece is released by the clamping jaw, the spring piece is made to be attached to the inner walls of the four hole wall protection pieces on the same layer in an annular mode under the elastic action, the position of the hole wall protection piece is limited, the operation is repeated according to the paving depth of the hole wall protection piece until the paving is finished, and the plurality of hole wall protection pieces form a cylindrical protection layer on the inner side of the hole wall.
The invention provides another technical scheme, and a cast-in-place pile processing method comprises the following steps:
step S1, preparing a protective sheet: defining the radius of a pile hole as r, placing a steel bar framework in a mould, and pouring concrete to form a hole wall protection sheet with the arc length of pi/2 r;
step S2, drilling: placing a steel casing at a preset hole position, driving a drill rod to vertically drill downwards at the preset hole position through a drill bit at the bottom end of the drill rod by a drilling machine, and pumping out slurry by using a slurry conveying pipe while drilling;
step S3, paving protection pieces: when the drilling depth is below the steel casing, the chip mounting mechanism starts to work, the initial position of the chip mounting mechanism is on a track on the outer wall of the drill rod and above the steel casing, after a worker places a prefabricated hole wall protection chip on a protection chip seat, a first rail car moves downwards along the track to the position below the steel casing, and then a hydraulic telescopic rod extrudes the protection chip seat with the hole wall protection chip to the hole wall to enable the hole wall protection chip to be laid on the hole wall;
the device comprises a drill rod, a hole wall guard sheet, two groups of chip mounting mechanisms, an electronic meter counter, a plurality of electronic meter counters and a plurality of chip mounting mechanisms, wherein the chip mounting mechanisms are arranged into two groups which are distributed in a vertically staggered mode, the distance between the upper group and the lower group is the height of the hole wall guard sheet, each group is provided with two chip mounting mechanisms which are symmetrically distributed on two sides of the drill rod, each group of chip mounting mechanisms simultaneously paves and attaches two hole wall guard sheets at opposite positions, the two groups of chip mounting mechanisms complete paving work of two layers of hole wall guard sheets which are adjacent vertically every two times when lifting, and the lifting height of each chip mounting mechanism is fed back by the electronic meter counter so that the paving position of the hole wall guard sheet is accurate;
step S4, fixing the guard piece: after the hole wall protection pieces are paved for two layers, the feeding mechanism starts to work, the initial position of the feeding mechanism is above the surface mounting mechanism, a spring piece is placed on the clamping jaw by a worker to be clamped and fixed, then a second rail car drives the clamping jaw to move downwards through the jaw arm to the height position of the hole wall protection piece and stops, the clamping jaw releases the spring piece, the spring piece is enabled to be annularly pasted on the inner walls of the four hole wall protection pieces on the same layer under the elastic action, the position of the hole wall protection piece is limited, the operation is repeatedly carried out according to the paving depth of the hole wall protection piece until the paving is finished, and a plurality of hole wall protection pieces form a cylindrical protection layer on the inner side of the hole wall;
step S5, grouting and pile forming: and grouting the cylindrical protective layer, and implanting a reinforcement cage to enable the hole wall protective sheet, the reinforcement cage and the concrete to form a whole.
The invention provides another technical scheme, and the cast-in-place pile is formed by processing the cast-in-place pile through the cast-in-place pile processing method.
Compared with the prior art, the hole wall processing device of the cast-in-place pile and the cast-in-place pile processing method provided by the invention have the remarkable beneficial effects that:
1. hole wall protection: the hole wall protection pieces are paved in the drilling process, the plurality of hole wall protection pieces form a protection layer, and can play a role in supporting a soil layer structure on the inner side of the hole wall, so that the soil layer is prevented from collapsing, the stability of the pile hole structure is kept, compared with the existing mud wall protection mode, the forming speed of the wall protection structure is higher, the wall protection effect is stable, the pile hole which is not suitable for the mud wall protection mode, such as a soft sandy soil layer, can be used widely.
2. And (3) sedimentation prevention: the hole wall protection sheet is integrated with the pile body after the cage is planted in subsequent grouting, and the bulge structure on the outer wall of the hole wall protection sheet can be embedded into a soil layer, so that the formed cast-in-place pile body has the effect of a friction pile, and the structural stability of the pile body in the soil layer is enhanced.
3. The construction period is reduced: it should be understood that all combinations of the foregoing concepts and additional concepts described in greater detail below can be considered as part of the inventive subject matter of this disclosure unless such concepts are mutually inconsistent. In addition, all combinations of claimed subject matter are considered a part of the presently disclosed subject matter.
The foregoing and other aspects, embodiments and features of the present teachings can be more fully understood from the following description taken in conjunction with the accompanying drawings. Additional aspects of the present invention, such as features and/or advantages of exemplary embodiments, will be apparent from the description which follows, or may be learned by practice of the specific embodiments according to the teachings of the present invention.
Drawings
The figures are not intended to be drawn to scale. In the drawings, each identical or nearly identical component that is illustrated in various figures may be represented by a like numeral. For purposes of clarity, not every component may be labeled in every drawing. Embodiments of various aspects of the present invention will now be described, by way of example, with reference to the accompanying drawings, in which:
fig. 1 is a schematic view of a hole wall treatment device of a cast-in-place pile according to an embodiment of the present invention;
fig. 2 is a schematic view of an apparatus for use in patch construction in a method for processing a hole wall of an injection pile according to an embodiment of the present invention;
FIG. 3 is a schematic view of a hole wall guard piece and a spring piece in patch construction in the hole wall treatment method for a cast-in-place pile according to the embodiment of the present invention;
fig. 4 is a schematic top view of a patch mechanism in a hole wall processing apparatus for a cast-in-place pile according to an embodiment of the present invention;
fig. 5 is a schematic top view of a feeding mechanism in the hole wall processing apparatus for a cast-in-place pile according to an embodiment of the present invention;
fig. 6 is a schematic view showing a structure of a hole wall guard sheet and a guard sheet seat fitted in a hole wall processing apparatus for a bored concrete pile according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram illustrating a distribution of one-time installed hole wall protection sheets in an embodiment of a method for processing a hole wall of an injection pile according to the present invention;
fig. 8 is a schematic view of another hole wall guard and guard seat of the hole wall processing apparatus of a bored concrete pile according to an embodiment of the present invention.
Detailed Description
In order to better understand the technical content of the present invention, specific embodiments are described below with reference to the accompanying drawings.
In this disclosure, aspects of the present invention are described with reference to the accompanying drawings, in which a number of illustrative embodiments are shown. Embodiments of the present disclosure are not necessarily intended to include all aspects of the invention. It should be appreciated that the various concepts and embodiments described above, as well as those described in greater detail below, may be implemented in any of numerous ways by the apparatus and method for hole wall treatment of a bored pile, as the disclosed concepts and embodiments are not limited to any embodiment. In addition, some aspects of the present disclosure may be used alone, or in any suitable combination with other aspects of the present disclosure.
[ HOLE WALL TREATMENT DEVICE FOR CAST-IN PILE ]
Referring to fig. 1, a first aspect of the present invention provides a technical solution, in which a hole wall processing apparatus for a cast-in-place pile mainly includes: the device comprises a drill rod 1, a chip mounting mechanism 2, a feeding mechanism 4, a hole wall protection chip 3 and a spring piece 5.
Wherein, the bottom of drilling rod 1 sets up rotatable drill bit 11 to carry out drilling operation under the drive of drilling machine 10, mud conveyer pipe 20 sets up in the top of drilling rod 1, is connected with outside negative pressure device, and is used for pumping the mud that produces when driling, and this part process of punching and drilling equipment are prior art.
Before punching, need squeeze into steel in advance on the hole site and protect a section of thick bamboo 30, make steel protect a section of thick bamboo 30 can be located pile hole upper end, though steel protects a section of thick bamboo 30 can stabilize the pore wall, prevents the hole that collapses, can also keep apart surface water, guide bit 11, fixed pile position, protection operation former ground etc. nevertheless because the drilling depth generally is greater than the degree of depth that a section of thick bamboo 30 was protected to the steel, consequently, can not play the protective effect to the pore wall of protecting the following part of a section of thick bamboo.
Paster mechanism
In order to keep protection on the hole wall drilled at a depth below the steel casing 30 and avoid collapse, the outer wall of the drill rod 1 is provided with a rail 12, the rail 12 is provided with a paster mechanism 2 capable of moving up and down, and the paster mechanism 2 is used for paving a hole wall protection sheet 3 on the inner side of the drilled hole wall.
Therefore, when the drill rod 1 drills a hole, the hole wall protection pieces 3 are sequentially paved on the inner wall of the pile hole below the steel protection cylinder 30 layer by layer from shallow to deep by the chip mounting mechanism 2 to form a protection layer, the protection layer formed by the hole wall protection pieces 3 can support a soil layer structure on the inner side of the hole wall, and the soil layer is prevented from falling down so as to keep the stability of the pile hole structure.
In a preferred embodiment, as shown in fig. 4, the patch mechanism 2 comprises a first rail car 21 capable of walking on the rail 12 and a hydraulic telescopic rod 22 fixed on the first rail car 21, an output end of the hydraulic telescopic rod 22 is provided with a guard plate seat 23 for loading the hole wall guard plate 3, and the hydraulic telescopic rod 22 drives the guard plate seat 23 to move horizontally and radially in the pile hole.
The track 12 is a toothed track, the first rail car 21 is provided with a traveling gear matched with the track, therefore, the first rail car 21 can move up and down along the track 12, the telescopic direction of the hydraulic telescopic rod 22 is the radial direction of a pile hole, the end part of the hydraulic telescopic rod is fixedly provided with the protection sheet seat 23 in a screwing mode, the protection sheet seat 23 is made of stainless steel and used for installing the hole wall protection sheet 3, and the hole wall protection sheet 3 is pressed and paved on the hole wall under the driving of the hydraulic telescopic rod 22.
Furthermore, the width of the protecting sheet seat 23 is more than 2/3 of the arc length of the hole wall protecting sheet 3, and the height of the protecting sheet seat is more than 2/3 of the hole wall protecting sheet 3, so that the contact surface is increased, the pressure intensity on the hole wall protecting sheet 3 is reduced, the hole wall protecting sheet 3 is prevented from being broken when the protecting sheet seat 23 presses the hole wall protecting sheet 3 to the hole wall, and the protecting sheet seat 23 can adopt a hollow structure to reduce the whole weight.
Feeding mechanism
In order to ensure that the paved hole wall protection piece 3 can be stably attached to the inner wall of the pile hole, a feeding mechanism 4 capable of moving up and down is further arranged on the track 12, the feeding mechanism 4 is located above the surface mounting mechanism 2, the feeding mechanism 4 is used for installing a spring piece 5 on the inner side of the paved hole wall protection piece 3, and the spring piece 5 is arranged on the inner side wall of the protective layer and used for supporting the hole wall protection piece 3 so as to maintain the position state of the protective layer.
Therefore, according to the laying depth of the protective layer, the spring pieces 5 are sequentially arranged on the inner side of the hole wall protective piece 3 from top to bottom by the feeding mechanism 4 and used for limiting the hole wall protective piece 3 with the same height on the inner wall of the pile hole.
As shown in fig. 5, in the preferred embodiment, the feeding mechanism 4 includes a second rail car 41 capable of traveling on the rail 12, and a claw arm 42 fixed to the periphery of the second rail car 41, and the end of the claw arm 42 is provided with a claw 43 for gripping/releasing the spring plate 5.
The second railcar 41 is also provided with a traveling gear which can be matched with teeth on the track 12, so that the second railcar 41 can move up and down along the track 12, the claw arms 42 are arranged on the peripheral side of the second railcar 41 and are horizontally arranged, the clamping jaws 43 at the end parts of the second railcar 41 are driven electrically or pneumatically, the annular spring pieces 5 which are in elastic contraction are clamped, after the inner sides of the hole wall protection pieces 3 are explored downwards, the clamping jaws 43 release the annular spring pieces 5 in the contraction state, the annular spring pieces 5 can expand outwards and are fixed on the inner sides of the hole wall protection pieces 3 at the same height by virtue of elasticity, and the hole wall protection pieces 3 are limited to avoid falling off from the hole wall.
Furthermore, the annular spring piece 5 is an arc-ring type thin spring which is in a closed annular shape in a clamping state and is in a C-shaped shape in a releasing state, and the gap part is smaller than the width of the single hole wall protection piece 3 so as to ensure stable elastic support for the hole wall protection piece 3.
In an alternative embodiment, the length of the claw arms 42 is smaller than the radius of the pile hole, when in use, the distance between the ring-shaped spring plate 5 and the inner wall of the hole wall protection plate 3 in the contraction state can be 100-200 mm, the number of the claw arms 42 can be set to be one to four, correspondingly, in order to ensure the stable clamping of the ring-shaped spring plate 5, at least one clamping jaw 43 on the claw arm 42 needs to clamp the staggered part of the fracture of the ring-shaped spring plate 5.
Hole wall protection sheet
Furthermore, in order to ensure that the hole wall protection piece 3 can have a certain moving range in the pile hole and is convenient to install, the hole wall protection piece 3 is in an arc plate shape.
In a preferred embodiment, as shown in fig. 2, 3 and 7, to improve the mounting efficiency of the hole wall guard 3, the arc length of the hole wall guard 3 is pi/2 r. The four pasting mechanisms 2 are arranged, and the four tracks 12 correspondingly arranged are arranged in a central symmetry manner.
Two opposite chip mounting mechanisms 2 are taken as a group, and the distance between the two groups of chip mounting mechanisms 2 in the height direction is equal to the height of the hole wall protection sheet 3.
Thus, in the installation process of the hole wall protection pieces 3, the four sticking mechanisms 2 are staggered at a certain height to keep the relative positions fixed, move up and down at the same time in pairs, and are paved on the inner wall of the hole wall protection pieces 3, eight hole wall protection pieces 3 (correspondingly, two layers of hole wall protection pieces 3 which are complete in cylindrical shape) can be paved twice in a reciprocating mode, and after the two layers are paved, the feeding mechanism 4 starts to install the annular spring piece 5.
Further, all install the electron meter rice ware 6 that is used for measuring the degree of depth at the place on paster mechanism 2 and the feeding mechanism 4, electron meter rice ware 6 and external power source electric connection, so, 2 descending degree of depth cooperation drilling rods 1 descending degree of depth at every turn of paster mechanism, can obtain the total depth of 2 descending positions of paster mechanism, calculate the distance that 2 and feeding mechanism 4 of paster mechanism need remove at every turn according to this to improve and lay to hole wall guard sheet 3, and the accuracy of installation ring spring piece 5.
Referring to fig. 6, in an alternative embodiment, the upper and lower ends of the outer sidewall of the hole wall protective sheet 3 are provided with protruding positioning insertion shafts 31, a vacuum chuck 231 is provided on the joint surface of the protective sheet seat 23 and the hole wall protective sheet 3, the vacuum chuck 231 is electrically connected to an external power supply, and when the hole wall protective sheet 3 is paved, the positioning insertion shafts 31 on the hole wall protective sheet 3 can be stably attached to the hole wall within a certain time period, and cannot fall off.
As shown in fig. 8, in a preferred embodiment, a protruding friction rib 32 is disposed on an outer side wall of the hole wall guard piece 3, a protruding insertion shaft group 33 is disposed on an inner side wall of the hole wall guard piece 3, and a socket hole 232 matched with the insertion shaft group 33 is disposed on a joint surface of the guard piece seat 23 and the hole wall guard piece 3, wherein the protruding friction rib 32 is pressed into a soil layer when being paved, so that longitudinal friction force between the protruding friction rib and the soil layer can be enhanced, the insertion shaft group 33 protrudes inward, and in a subsequent grouting process, an adhesion area with slurry can be increased, so that a pile body formed by solidifying the hole wall guard piece 3 and a subsequent casting liquid is firmer.
Further, in a specific embodiment, the hole wall protection sheet 3 is a prefabricated reinforced concrete plate, so that the hole wall protection sheet 3 can be integrated with a pile body in a later-stage pile body pouring process, the hole wall protection sheet 3 not only can play a hole wall protection effect, but also can be matched with a subsequent reinforcement cage and concrete to form a friction pile body, and the stability of the pile body in a soil layer is improved.
[ METHOD FOR TREATING HOLE WALL OF PILE-CASTING PILE ]
The second aspect of the present invention provides a technical solution, and a method for processing a hole wall of a cast-in-place pile, comprising the following steps:
step S1, preparing a protective sheet: defining the radius of a pile hole as r, placing a steel bar framework in a mould, and pouring concrete to form a hole wall protection sheet 3 with the arc length of pi/2 r, wherein the thickness of the hole wall protection sheet 3 is 15-20 mm, and the diameter of a built-in steel bar is 5-8 mm;
step S2, drilling: placing a steel casing 30 at a preset hole position, wherein the diameter of the steel casing 30 is 600mm, the thickness of the steel casing 30 is 15mm, driving the drill rod 1 to pass through a drill bit 11 at the bottom end of the steel casing by a drilling machine 10, drilling a hole vertically downwards at the preset hole position by the drill bit 11 with the diameter of 450mm, and pumping out slurry by using a slurry conveying pipe 20 while drilling;
step S3, paving protection pieces: when the drilling depth is below the steel casing 30, the chip mounting mechanism 2 starts to work, the initial position of the chip mounting mechanism 2 is on the track 12 on the outer wall of the drill rod 1 and above the steel casing 30, after a worker places the prefabricated hole wall protection chip 3 on the protection chip seat 23, the first rail car 21 moves downwards along the track 12 to the position below the steel casing 30, and then the hydraulic telescopic rod 22 extrudes the protection chip seat 23 with the hole wall protection chip 3 to the hole wall, so that the hole wall protection chip 3 is paved on the hole wall;
the device comprises a drill rod 1, chip mounting mechanisms 2, hole wall protection pieces 3, electronic meter counters 6 and electronic meter counters 6, wherein the chip mounting mechanisms 2 are arranged into two groups which are distributed in a vertically staggered mode, the distance between the upper group and the lower group is the height of the hole wall protection pieces 3, each group is two chip mounting mechanisms 2 which are symmetrically distributed on two sides of the drill rod 1, each group of chip mounting mechanisms 2 simultaneously lay and attach two hole wall protection pieces 3 at opposite positions, the two groups of chip mounting mechanisms 2 drop per liter to complete laying work of the two adjacent layers of hole wall protection pieces 3 vertically, and the lifting height of each chip mounting mechanism 2 is fed back by the electronic meter counters 6 so that the laying position of the hole wall protection pieces 3 is accurate;
step S4, fixing the guard piece: after the hole wall protection pieces 3 are paved into two layers, the feeding mechanism 4 starts to work, the initial position of the feeding mechanism 4 is above the surface mounting mechanism 2, the spring leaf 5 is placed on the clamping jaw 43 by a worker to be clamped and fixed, then the second rail car 41 drives the clamping jaw 43 to move downwards to the height position of the hole wall protection pieces 3 through the jaw arm 42 and stops, the clamping jaw 43 releases the spring leaf 5, the spring leaf 5 is made to be attached to the inner walls of the four hole wall protection pieces 3 on the same layer under the elastic action, the position of the hole wall protection pieces 3 is limited, the operation is repeated according to the paving depth of the hole wall protection pieces 3 until the paving is finished, and the plurality of hole wall protection pieces 3 form cylindrical protection layers on the inner sides of the hole walls.
So, pore wall bluff piece 3 just begins to spread at drilling in-process and pastes, and for current mud dado mode, dado structure shaping speed is faster, and the dado effect is stable, can be to the pile hole that unsuitable mud dado mode such as soft sandy soil layer, and the usage is wider, can play the support soil layer structure by the inboard of pore wall that forms the inoxidizing coating of a plurality of pore wall bluff pieces 3, prevents the effect of soil layer slump to keep the stability of pile hole structure.
[ METHOD FOR PRODUCING PILE-FILLED PILE ]
The third aspect of the invention provides a technical scheme, and a cast-in-place pile processing method comprises the following steps:
step S1, preparing a protective sheet: defining the radius of a pile hole as r, placing a steel bar framework in a mould, and pouring concrete to form a hole wall protection sheet 3 with the arc length of pi/2 r;
step S2, drilling: placing a steel casing 30 at a preset hole position, driving the drill rod 1 to drill vertically downwards at the preset hole position through a drill bit 11 at the bottom end of the drill rod by a drilling machine 10, and pumping out slurry by using a slurry conveying pipe 20 while drilling;
step S3, paving protection pieces: when the drilling depth is below the steel casing 30, the chip mounting mechanism 2 starts to work, the initial position of the chip mounting mechanism 2 is on the track 12 on the outer wall of the drill rod 1 and above the steel casing 30, after a worker places the prefabricated hole wall protection chip 3 on the protection chip seat 23, the first rail car 21 moves downwards along the track 12 to the lower part of the steel casing 30, and then the hydraulic telescopic rod 22 extrudes the protection chip seat 23 with the hole wall protection chip 3 to the hole wall, so that the hole wall protection chip 3 is laid on the hole wall;
the device comprises a drill rod 1, chip mounting mechanisms 2, hole wall protection pieces 3, electronic meter counters 6 and electronic meter counters 6, wherein the chip mounting mechanisms 2 are arranged into two groups which are distributed in a vertically staggered mode, the distance between the upper group and the lower group is the height of the hole wall protection pieces 3, each group is two chip mounting mechanisms 2 which are symmetrically distributed on two sides of the drill rod 1, each group of chip mounting mechanisms 2 simultaneously lay and attach two hole wall protection pieces 3 at opposite positions, the two groups of chip mounting mechanisms 2 drop per liter to complete laying work of the two adjacent layers of hole wall protection pieces 3 vertically, and the lifting height of each chip mounting mechanism 2 is fed back by the electronic meter counters 6 so that the laying position of the hole wall protection pieces 3 is accurate;
step S4, fixing the guard piece: after the hole wall protection pieces 3 are paved into two layers, the feeding mechanism 4 starts to work, the initial position of the feeding mechanism 4 is above the surface mounting mechanism 2, a worker places the spring leaf 5 on the clamping jaw 43 to clamp and fix the spring leaf, then the second rail car 41 drives the clamping jaw 43 to move downwards to the height position of the hole wall protection pieces 3 through the jaw arm 42 to stop, the clamping jaw 43 releases the spring leaf 5, the spring leaf 5 is attached to the inner walls of the four hole wall protection pieces 3 on the same layer under the elastic action, the position of the hole wall protection pieces 3 is limited, the process is repeated according to the paving depth of the hole wall protection pieces 3 until the paving is finished, and the plurality of hole wall protection pieces 3 form a cylindrical protection layer on the inner side of the hole wall;
step S5, grouting and pile forming: and grouting the cylindrical protective layer, and implanting a reinforcement cage to enable the hole wall protective sheet 3, the reinforcement cage and the concrete to form a whole.
Therefore, the construction of wall protection paster is carried out on the hole wall in the drilling process, the steel reinforcement cage can be grouted and put down into the pile hole after the drilling is finished, the problem of hole wall collapse in the drilling process can be avoided, the construction speed is accelerated, the construction period is shortened, the formed pile body and the hole wall protection sheet 3 are integrated, the hole wall protection sheet 3 does not need to be taken out, and the anti-settling effect of the pile body in the soil layer is enhanced by utilizing the axial friction effect of the hole wall protection sheet 3 and the hole wall.
[ A bored concrete pile ]
The fourth aspect of the invention provides a technical scheme, a cast-in-place pile is formed by processing the cast-in-place pile processing method, the inner core is provided with a steel mesh cage body and an outer layer formed by the hole wall protection sheet 3, and the outer wall of the hole wall protection sheet 3 is provided with a protruding structure which can be embedded into a soil layer, so that the formed cast-in-place pile body has the effect of a friction pile, the stability of the pile body in the soil layer is enhanced, and the anti-settlement effect is achieved.
Although the invention has been described with reference to preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention. Therefore, the protection scope of the present invention should be determined by the appended claims.
Claims (12)
1. A hole wall processing device of a cast-in-place pile is characterized by comprising:
the drilling rod (1), the bottom sets up the bit (11) that can rotate, and carry on the borehole operation under the drive of the drilling machine (10);
the slurry conveying pipe (20) is arranged at the top of the drill rod (1), is connected with an external negative pressure device and is used for pumping slurry generated in drilling;
the steel pile casing (30) is arranged at the upper end of the pile hole;
the chip mounting mechanism (2) is arranged on the outer side wall of the drill rod (1) and can move up and down along a track (12) on the outer wall of the drill rod (1);
the feeding mechanism (4) is arranged on the outer side wall of the drill rod (1), can move up and down along a track (12) on the outer wall of the drill rod (1), and is positioned above the chip mounting mechanism (2);
the protective layer is arranged on the inner wall of the pile hole, is positioned below the steel pile casing (30) and is surrounded by a plurality of hole wall protective sheets (3);
the spring piece (5) is arranged on the inner side wall of the protective layer and is used for supporting the hole wall protective piece (3) so as to maintain the position state of the protective layer;
wherein, when drilling rod (1) is driped, it is a plurality of pore wall bluff piece (3) quilt paster mechanism (2) from shallow to dark successive layer lay in proper order form on the stake hole inner wall of steel casing (30) below the inoxidizing coating, and the basis the degree of depth of laying of inoxidizing coating, it is a plurality of spring leaf (5) from top to bottom in proper order by feeding mechanism (4) set up the inboard of pore wall bluff piece (3) is used for same height on the stake hole inner wall pore wall bluff piece (3) carry on spacingly.
2. The hole wall processing device of the cast-in-place pile according to claim 1, characterized in that the pasting mechanism (2) comprises a first rail car (21) capable of walking on the rail (12) and a hydraulic telescopic rod (22) fixed on the first rail car (21), the output end of the hydraulic telescopic rod (22) is provided with a guard sheet seat (23) for loading the hole wall guard sheet (3), and the hydraulic telescopic rod (22) is arranged to drive the guard sheet seat (23) to move horizontally in the pile hole.
3. The hole wall processing device of the cast-in-place pile according to claim 2, characterized in that the hole wall protection sheet (3) is in the shape of an arc plate, the arc length of the hole wall protection sheet (3) is pi/2 r, wherein r is the radius of the pile hole.
4. The hole wall processing device of the cast-in-place pile according to claim 2, characterized in that the hole wall processing device comprises four paster mechanisms (2) and two opposite paster mechanisms (2) in one group, and the distance between the two groups of paster mechanisms (2) in the height direction is equal to the height of the hole wall protection sheet (3);
four tracks (12) corresponding to the four patch mechanisms (2) are arranged in central symmetry.
5. The hole wall processing device of the cast-in-place pile according to claim 1, characterized in that the feeding mechanism (4) comprises a second rail car (41) capable of walking on the rail (12), and a claw arm (42) fixed on the periphery of the second rail car (41), and the end of the claw arm (42) is provided with a claw (43) for clamping/releasing the spring plate (5).
6. The hole wall processing device of the cast-in-place pile according to claim 1, wherein the patch mechanism (2) and the feeding mechanism (4) are both provided with an electronic meter counter (6) for measuring the depth.
7. The hole wall processing device of the cast-in-place pile according to any one of claims 2-4, characterized in that the upper and lower ends of the outer side wall of the hole wall guard sheet (3) are provided with protruding positioning insertion shafts (31); and a vacuum chuck (231) is arranged on the joint surface of the protection sheet seat (23) and the hole wall protection sheet (3), and the vacuum chuck (231) is electrically connected with an external power supply and used for controlling the state of the vacuum chuck.
8. The hole wall processing device of the cast-in-place pile according to any one of claims 2 to 4, characterized in that a protruding friction rib (32) is arranged on the outer side wall of the hole wall guard sheet (3), a protruding jack group (33) is arranged on the inner side wall of the hole wall guard sheet (3), and a bearing hole (232) matched with the jack group (33) is arranged on the joint surface of the guard sheet seat (23) and the hole wall guard sheet (3).
9. The hole wall treatment device of the cast-in-place pile according to any one of claims 2 to 4, wherein the hole wall protection sheet (3) is a prefabricated reinforced concrete slab.
10. A method for processing the wall of a bored pile using the apparatus according to any one of claims 1 to 9, comprising the steps of:
step S1, preparing a protective sheet: defining the radius of a pile hole as r, placing a steel bar framework in a mould, and pouring concrete to form a hole wall protection sheet (3) with the arc length of pi/2 r;
step S2, drilling: placing a steel casing (30) at a preset hole position, driving a drill rod (1) to vertically drill downwards at the preset hole position through a drill bit (11) at the bottom end of the drill rod by a drilling machine (10), and pumping out slurry by using a slurry conveying pipe (20) while drilling;
step S3, paving protection pieces: when the drilling depth is below a steel casing (30), a chip mounting mechanism (2) starts to work, the initial position of the chip mounting mechanism (2) is on a track (12) on the outer wall of the drill rod (1) and above the steel casing (30), after a worker places a prefabricated hole wall protection chip (3) on a protection chip seat (23), a first rail car (21) moves downwards to the position below the steel casing (30) along the track (12), and then a hydraulic telescopic rod (22) extrudes the protection chip seat (23) with the hole wall protection chip (3) to the hole wall, so that the hole wall protection chip (3) is laid on the hole wall;
the hole wall protection pieces (3) are arranged on the drill rod (1), the upper and lower groups of the chip mounting mechanisms (2) are arranged in a staggered manner, the distance between the upper and lower groups is the height of the hole wall protection pieces (3), each group is provided with two chip mounting mechanisms (2) which are symmetrically distributed on two sides of the drill rod (1), each group of the chip mounting mechanisms (2) simultaneously lays and attaches two hole wall protection pieces (3) at opposite positions, each liter of the two groups of the chip mounting mechanisms (2) is lowered twice to finish the laying work of the two adjacent layers of the hole wall protection pieces (3), and the lifting height of each chip mounting mechanism (2) is fed back by an electronic meter counter (6) so that the laying position of the hole wall protection pieces (3) is accurate;
step S4, fixing the guard piece: when the hole wall protection sheet (3) is paved into two layers, the feeding mechanism (4) starts to work, the initial position of the feeding mechanism (4) is above the paster mechanism (2), a worker places the spring sheet (5) on the clamping jaw (43) for clamping and fixing, then the second rail car (41) is stopped after a clamping jaw (43) is driven by a claw arm (42) to move downwards to the height position of the hole wall protection sheet (3), the clamping jaw (43) releases the spring leaf (5), so that the spring leaf (5) is attached to the inner walls of the four hole wall protection sheets (3) on the same layer under the elastic action, and limiting the position of the hole wall protection sheet (3), and repeating the process according to the laying depth of the hole wall protection sheet (3) until the laying is finished, so that a plurality of hole wall protection sheets (3) form a cylindrical protective layer on the inner side of the hole wall.
11. A method for processing a cast-in-place pile by using the device of any one of claims 1-9, comprising the steps of:
step S1, preparing a protective sheet: defining the radius of a pile hole as r, placing a steel bar framework in a mould, and pouring concrete to form a hole wall protection sheet (3) with the arc length of pi/2 r;
step S2, drilling: placing a steel casing (30) at a preset hole position, driving a drill rod (1) to vertically drill downwards at the preset hole position through a drill bit (11) at the bottom end of the drill rod by a drilling machine (10), and pumping out slurry by using a slurry conveying pipe (20) while drilling;
step S3, paving protection pieces: when the drilling depth is below a steel casing (30), a chip mounting mechanism (2) starts to work, the initial position of the chip mounting mechanism (2) is on a track (12) on the outer wall of the drill rod (1) and above the steel casing (30), after a worker places a prefabricated hole wall protection chip (3) on a protection chip seat (23), a first rail car (21) moves downwards to the position below the steel casing (30) along the track (12), and then a hydraulic telescopic rod (22) extrudes the protection chip seat (23) with the hole wall protection chip (3) to the hole wall, so that the hole wall protection chip (3) is laid on the hole wall;
the hole wall protection pieces (3) are arranged on the drill rod (1), the upper and lower groups of the chip mounting mechanisms (2) are arranged in a staggered manner, the distance between the upper and lower groups is the height of the hole wall protection pieces (3), each group is provided with two chip mounting mechanisms (2) which are symmetrically distributed on two sides of the drill rod (1), each group of the chip mounting mechanisms (2) simultaneously lays and attaches two hole wall protection pieces (3) at opposite positions, each liter of the two groups of the chip mounting mechanisms (2) is lowered twice to finish the laying work of the two adjacent layers of the hole wall protection pieces (3), and the lifting height of each chip mounting mechanism (2) is fed back by an electronic meter counter (6) so that the laying position of the hole wall protection pieces (3) is accurate;
step S4, fixing the guard piece: when the hole wall protection sheet (3) is paved for two layers, the feeding mechanism (4) starts to work, the initial position of the feeding mechanism (4) is above the paster mechanism (2), a worker places the spring sheet (5) on the clamping jaw (43) for clamping and fixing, then the second rail car (41) drives the clamping jaw (43) to move downwards through the claw arm (42) to the height position of the hole wall protection sheet (3) and then stops, the clamping jaw (43) releases the spring piece (5), so that the spring piece (5) is attached to the inner walls of the four hole wall protection sheets (3) on the same layer in an encircling manner under the elastic action, limiting the position of the hole wall protection piece (3), and repeatedly carrying out the limiting according to the laying depth of the hole wall protection piece (3) until the laying is finished, so that a plurality of hole wall protection pieces (3) form a cylindrical protection layer on the inner side of the hole wall;
step S5, grouting and pile forming: and grouting the cylindrical protective layer, and implanting a reinforcement cage to enable the hole wall protective sheet (3), the reinforcement cage and the concrete to form a whole.
12. A cast-in-place pile comprising a sheet guard layer provided to a hole wall and a reinforced concrete structure located within the sheet guard layer, the sheet guard layer comprising a plurality of hole wall sheets (3), the sheet guard layer and the reinforced concrete structure being formed by the method of claim 11.
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| CN202210742838.2A CN115012403A (en) | 2022-06-27 | 2022-06-27 | Hole wall treatment device and method for cast-in-place pile |
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| CN202210742838.2A CN115012403A (en) | 2022-06-27 | 2022-06-27 | Hole wall treatment device and method for cast-in-place pile |
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