CN110670585B - Pile extension construction method - Google Patents
Pile extension construction method Download PDFInfo
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- CN110670585B CN110670585B CN201911013271.XA CN201911013271A CN110670585B CN 110670585 B CN110670585 B CN 110670585B CN 201911013271 A CN201911013271 A CN 201911013271A CN 110670585 B CN110670585 B CN 110670585B
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- reinforcement cage
- pile
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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
- E02D13/00—Accessories for placing or removing piles or bulkheads, e.g. noise attenuating chambers
- E02D13/04—Guide devices; Guide frames
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
Abstract
The invention provides a pile extension construction method, which relates to the field of pile extension construction and comprises a leveling field; construction lofting; embedding a pile casing; selecting a drilling machine; opening a hole and installing a guide pipe; cleaning holes; putting down a reinforcement cage; the underwater concrete pouring method comprises the steps that a retaining cylinder is further provided with a setting frame on the outer side of the retaining cylinder after being buried underground, a guide frame is arranged at an orifice when a steel reinforcement cage is arranged below the retaining cylinder, the guide frame comprises a guide frame which is attached to the outer wall of the steel reinforcement cage after being adjusted and a supporting base which is used for being fixed on the ground, the supporting base is connected with the outer wall of the guide frame through a connecting support, the accuracy of the lowering position of the steel reinforcement cage in pile connecting column construction is improved, meanwhile, the position of the steel reinforcement cage which is lowered first in the lapping process of the steel reinforcement cage is fixed, and the construction efficiency and the quality of the pile connecting.
Description
Technical Field
The invention relates to a pile extension construction method.
Background
The construction steps of the pile extension column comprise construction lofting, embedding of a protective cylinder, selection of a drilling machine, hole opening, hole cleaning, steel reinforcement cage placement, concrete pouring and the like, wherein in the steel reinforcement cage placement operation, a crane is used for hoisting the steel reinforcement cage to be placed and vertically placing the steel reinforcement cage into a drill hole, in order to ensure the construction quality of the pile extension column, the axis of the steel reinforcement cage and the axis of the drill hole need to be ensured to be coincident as much as possible, in the prior art, in the steel reinforcement cage placement process, a worker is often arranged to manually adjust the position of the placed steel reinforcement cage, however, the method has hidden danger on the one hand in the safety of the operator, and on the other hand, the professional level requirement of the worker is high by manually estimating and adjusting the placement position of the steel reinforcement cage, the error is generally overlarge, if the steel reinforcement cage is scraped to the hole wall of the drill hole in the placement process, mud falls into the bottom of the hole to form sediments, the construction efficiency and the construction quality of the pile extension are influenced;
meanwhile, when the pile connecting column with larger height is constructed, the reinforcement cage needs to be lapped while the reinforcement cage is put down, when the reinforcement cages are lapped, firstly, the reinforcement cage which is firstly placed is placed to a designated position, so that the part of the reinforcement cage is exposed out of the ground and the position of the reinforcement cage is fixed, then, the other reinforcement cage is lifted and placed to the lower end of the reinforcement cage to be coincided with the upper end part of the reinforcement cage which is firstly placed, the position of the reinforcement cage which is placed later is fixed, a worker welds the two reinforcement cages, the reinforcement cage is continuously placed after the welding operation is finished, the reinforcement cage which is firstly placed is fixed by a temporary support which is arranged in the prior art, the operation is more complicated and the time is wasted, meanwhile, after the reinforcement cage is welded, the temporary support needs to be timely detached to prevent the influence on the lowering of the reinforcement cage, and the construction efficiency of the pile extension column is seriously influenced.
Disclosure of Invention
The invention provides a pile extension construction method which is used for improving the accuracy of a steel reinforcement cage lowering position in pile extension construction, and is also used for fixing the position of a steel reinforcement cage which is lowered firstly in the lapping process of the steel reinforcement cage, so that the construction efficiency and the quality of a pile extension are improved.
The technical scheme of the invention is realized as follows: the pile-splicing construction method comprises the following steps:
s1, leveling a construction site, removing sundries, leveling and rolling;
s2, construction lofting, namely roughly releasing the position of a pile casing by using a GPS and a total station, simultaneously arranging pile guards around by using thin steel wires, and accurately positioning the center point of a pile foundation by using a cross lofting mode;
s3, embedding a pile casing, excavating a pile casing foundation by adopting an excavator, reinforcing a slope of the pile casing, and measuring vertical deviation by using a plumb bob or a horizontal ruler;
s4, selecting a drilling machine, selecting a proper drilling machine according to the geological condition and the surrounding field condition, and checking the performance state of the drilling machine in advance to ensure that the drilling machine works normally;
s5, opening a hole, installing a guide pipe, preventing hole inclination and pile position deviation during hole opening, and supplementing water and prepared slurry into the hole in time after slag removal and drill stopping during the drilling process to keep the water level height, the slurry proportion and the viscosity in the hole;
s6, cleaning the holes, after checking and confirming that the drilled holes are qualified, cleaning the holes, leaving the drilling bucket in place, mechanically rotating for a plurality of circles, loading sediment at the bottom of the holes into the rotary excavating bucket, lifting the drilling bucket to throw away slag;
s7, lowering the reinforcement cage, using a crane to hoist the reinforcement cage, wherein lifting points are symmetrically arranged at the joint of the reinforcement cage stirrup and the main reinforcement about the axis of the reinforcement cage, connecting lines of the lifting points penetrate through the axis of the reinforcement cage, and the reinforcement cage is vertically lowered into the drilled hole;
s8, underwater concrete pouring, injecting water into the guide pipe, pressing by using an air compressor, simultaneously checking whether a water leakage point exists in the guide pipe, checking the sediment thickness after the guide pipe is installed, enabling the bottom of the guide pipe to be 30-50 cm away from the bottom of a hole, circulating slurry in the hole, detecting the slurry, calculating the required dosage of the first-tray concrete, ensuring that the depth of the guide pipe embedded in the concrete after the first-tray concrete pouring is not less than 1.0m, and embedding the opening of the guide pipe into the concrete for at least 1.0m in the whole concrete pouring time;
in the process of implementing the step S7, a guide frame for positioning and guiding the reinforcement cage is supported above the drill hole, the guide frame comprises a guide frame which is attached to the outer wall of the reinforcement cage after being adjusted and a support base which is used for being fixed on the ground, the supporting base is connected with the outer wall of the guide frame through a connecting frame, when a steel reinforcement cage enters a hole, the lifting points are symmetrically arranged at the connecting positions of the stirrups of the reinforcement cage and the main reinforcements relative to the axis of the reinforcement cage, the connecting lines of the lifting points penetrate through the axis of the reinforcement cage, and in the process of lowering the reinforcement cage, vertically lowering the steel reinforcement cage into the drill hole through the guide frame, lowering the steel reinforcement cage to a designated position first and needing to be lapped with the steel reinforcement cage then, fixing the steel reinforcement cage below by using the positioning rod to penetrate through the guide frame and the steel reinforcement cage, the connecting line of at least two contact points of the positioning rod and the reinforcement cage is intersected with the axis of the reinforcement cage;
the guide frame comprises two first frames directly connected with the connecting frame, the two first frames are arranged in parallel and form a structure with adjustable relative distance, the two first frames are respectively sleeved with two second frames through two end parts of the two first frames, strip-shaped through grooves are formed in the two second frames, a plurality of connecting holes are uniformly formed in the two end parts of the first frames and the second frames, and when the position of the reinforcement cage is positioned, the first frames and the second frames are adjusted to be attached to the outer wall of the reinforcement cage and then fixed through the connecting holes in the first frames and the second frames by bolts;
the support base is of a T-shaped structure, a vertical connecting groove is formed in the vertical portion of the support base, a connecting block matched with the connecting groove is arranged on the connecting frame, a ball is embedded in the end portion of the connecting block, and the connecting block is in contact with the inner wall of the connecting groove through the ball.
The technical effect of the scheme is as follows: in the process of lowering the steel reinforcement cage, prop up above the drilling and establish the leading truck, the leading truck is used for leading and the location to the steel reinforcement cage of transferring, increase the degree of accuracy that the steel reinforcement cage transferred, prevent that the steel reinforcement cage from deviating predetermined route in the in-process of putting down, also can reduce rocking of steel reinforcement cage in the in-process of transferring, it cuts the dregs that the earth that makes the drilling pore wall drops to the drilling bottom plate increase drilling with the inner wall production of drilling when further preventing the steel reinforcement cage from transferring, guarantee construction quality and efficiency of construction, the leading truck further fixes the steel reinforcement cage of below when the steel reinforcement cage overlap joint, further make things convenient for going on of weldment work between the steel reinforcement cage, compare in between traditional building temporarily, workman's operation has been made things convenient for, efficiency of construction and construction quality have been promoted.
On the basis of the above scheme, the further improvement is that in the implementation process of step S7, two of the first frames are correspondingly provided with positioning holes, the through grooves of the two second frames are correspondingly provided with arc-shaped positioning grooves, and after the reinforcement cage is placed at a designated position, the positioning rod penetrates through the corresponding positioning hole and positioning groove to fix the position of the reinforcement cage below.
The technical effect of the scheme is as follows: when the steel reinforcement cage overlap joint, use the locating lever to pass relative locating hole, constant head tank, fix the steel reinforcement cage that is located the leading truck inboard, directly take out the locating lever after the steel reinforcement cage welding and can continue to transfer the steel reinforcement cage after the welding.
On the basis of the scheme, the positioning hole is a waist-shaped hole, and the upper end part and the lower end part in the positioning hole are connected with two arc-shaped first fixing plates with opposite openings through springs.
The technical effect of the scheme is as follows: locating lever and steel reinforcement cage owner muscle, the junction contact of stirrup, winding stirrup is the heliciform on the steel reinforcement cage, the height that is close to the main muscle of the relative both sides frame of guide frame and stirrup tie point exists slight difference in height, the locating hole sets up to waist type hole, the locating lever can adapt to the main muscle, the difference in height that exists between the stirrup tie point inserts in the locating hole of two first fixed frames, the locating lever is through first fixed plate, the contact of spring and locating hole, the stability that locating lever and locating hole are connected has been increased.
On the basis of above-mentioned scheme, further improve as follows for carry out two constant head tanks fixed relatively to same locating lever and set up in the upper and lower side that leads to the groove, the constant head tank that same logical groove upper and lower side corresponds has the curved second fixed plate that the opening is relative through spring coupling.
The technical effect of the scheme is as follows: locating lever and steel reinforcement cage owner muscle, the junction contact of stirrup, winding stirrup is the heliciform on the steel reinforcement cage, the height that is close to the main muscle of the relative both sides frame of guide frame and stirrup tie point exists slight difference in height, there is certain accommodation space in the constant head tank, the locating lever can adapt to the main muscle, the difference in height that exists between the stirrup tie point inserts in the constant head tank of the fixed frame of two seconds, the locating lever passes through the second fixed plate, spring and constant head tank contact, the stability of locating lever and locating hole connection has been increased.
On the basis of the scheme, the structure is further improved as follows, the connecting frame is connected with the supporting base through the lifting air cylinder, and the structure that the guide frame adjusts the fixing position of the steel reinforcement cage below relative to the ground when the steel reinforcement cage is lapped is formed.
The technical effect of the scheme is as follows: the link can go up and down under the effect of lift cylinder, for the joint strength who increases behind the steel reinforcement cage overlap joint, the main muscle of steel reinforcement cage sets up at its link is crisscross, and the workman can adjust the fixed height of steel reinforcement cage when welding the steel reinforcement cage, makes things convenient for workman's weldment work.
On the basis of the scheme, the method is further improved in that in the process of the step S3, a positioning frame is additionally arranged on the outer side of the pile casing, the positioning frame is made of I-steel and is square, I-steel inclined struts are additionally arranged at four corners of the positioning frame, after the positioning frame is machined, the pile casing is hoisted by using an automobile, the center of the positioning frame is aligned to the center of the pile casing and is righted by a worker, after the positioning frame is put down in place, gaps between the positioning frame and the hole wall are filled with cement mortar, and the periphery of the positioning frame is fixed by bolts.
On the basis of the above scheme, the method is further improved as follows, when the positioning frame is dismounted after the step S8 is completed, the lower ends of the lifting ropes are respectively connected with four corners of the positioning frame through four branch lifting ropes.
The technical effect of the scheme is as follows: after a pile casing is buried underground, the part of the pile casing exposed out of the ground is further fixed by using the positioning frame, the influence of vibration generated between the operation of the drilling machine and the ground in the drilling process on the pile casing is reduced, the deviation of the pile casing is reduced, the construction quality of a pile-connecting column is increased, and meanwhile, when the positioning frame is detached, the collision generated between the positioning frame and the pile casing is reduced.
On the basis of the scheme, the concrete pouring device is further improved in that the uppermost section of the guide pipe is connected with a funnel, when first-tray concrete pouring is carried out, an inflatable bladder is put into the joint of the funnel and the guide pipe, the diameter of the bladder is smaller than that of the guide pipe, the bladder can freely pass through the guide pipe, a cone plug is used for blocking the joint of the funnel and the guide pipe, the cone plug is immediately pulled out when the funnel is filled with concrete, the concrete is continuously added into the funnel, the concrete is continuously poured, the concrete continuously slides into the guide pipe from the side of the funnel opening after the first concrete pouring is completed, and meanwhile the funnel is prevented from being filled with the concrete.
The technical effect of the scheme is as follows: reduce the bubble that produces in the pouring process, increase the pouring quality of stake spud pile.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view of the construction process of the present invention;
FIG. 2 is a front view of the guide frame of the present invention;
FIG. 3 is a top view of the guide frame of the present invention;
FIG. 4 is an enlarged view of portion A of FIG. 3;
FIG. 5 is a schematic structural diagram of a first frame of the guide frame;
FIG. 6 is a schematic structural view of a second frame of the guide frame;
FIG. 7 is a schematic view of the positioning frame of the present invention;
wherein: 1-supporting base, 11-connecting groove, 2-guiding frame, 21-first frame, 211-positioning hole, 212-first fixing plate, 22-second frame, 221-through groove, 222-positioning groove, 223-second fixing plate, 3-connecting frame, 31-connecting block, 32-ball, 4-positioning frame, 5-protecting cylinder, a-connecting hole and b-spring.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
The concrete implementation steps of the pile extension construction method are as shown in figure 1:
s1, leveling a construction site, removing sundries, leveling and rolling;
s2, construction lofting, namely roughly releasing the position of the pile casing 5 by using a GPS and a total station, simultaneously adding a pile guard by using thin steel wires around, and accurately positioning the center point of the pile foundation by using a cross lofting mode to prevent the excessive burying deviation of the pile casing 5, wherein the deviation of the pile casing 5 is required to be within +/-5 cm according to the specification;
s3, embedding a pile casing 5, wherein the pile casing 5 is a steel pile casing 5 with the wall thickness of 1cm, the inner side and the outer side of the steel pile casing 5 are required to be subjected to rust prevention treatment, the diameter of the steel pile casing 5 is 20cm larger than the diameter of a pile, the length of the steel pile casing 5 is flexibly set according to construction requirements, the length of the steel pile casing 5 is generally about 3m longer than that of an upright post, the foundation excavation of the pile casing 5 can be matched with a traditional excavator, a slope can be properly taken or other side can be added to stabilize the slope according to geological conditions, the embedding verticality deviation of the pile casing 5 is controlled within L/1000, the vertical deviation can be measured by using a plumb bob or a horizontal ruler, the pile casing 5 is embedded about 30cm higher than the ground, surface water is prevented from;
s4, selecting a drilling machine, selecting a proper drilling machine according to geological conditions and surrounding field conditions, checking the performance state of the drilling machine in advance to ensure that the drilling machine works normally, accurately determining the position of the drilling machine through the measured pile position, adjusting the drilling rod to be kept in a vertical state by using an automatic control system after the rotary drilling machine is roughly leveled manually to ensure that the drilling rod is basically vertical, wherein the drilling machine requires a solid bottom and is kept stable, displacement and subsidence cannot be generated, and the deviation of a drill bit in the center of the pile casing 5 is not more than 10 mm;
s5, opening a hole, installing a guide pipe, arranging a slurry making tank and a sedimentation tank on site, connecting the slurry making tank and the sedimentation tank by a circulating rubber pipe, gradually entering a drilling machine by light pressure and slow rotation, accelerating drilling after all drill bits enter a stratum, and keeping the water level in the hole to be higher than the underground water level by 1.5-2.0 m and higher than the bottom foot of a protective cylinder 5 by more than 0.5m and lower than the top of the protective cylinder 5 by 0.2-0.3 m in the process of opening the hole and the whole drilling process so as to keep enough mud pressure to maintain the stability of the hole wall and prevent mud overflow and ensure civilized construction;
s6, cleaning holes, checking and confirming that the drilled holes are qualified, cleaning the holes, leaving the drilling bucket in situ for mechanical rotation for a plurality of circles, filling sediment at the bottom of the holes into the rotary excavating bucket, lifting the drilling bucket to throw away slag, cleaning the holes thoroughly, avoiding mud sediment caused by overlong time intervals to cause the drilled holes to collapse, wherein the cleaning of the holes can reach the following standard:
the mud discharged or extracted from the holes has no particles with the diameter of 2-3 mm, the specific gravity of the mud is not more than 1.1, the sand content is less than 2%, and the viscosity is 17-20 s;
the thickness of the sediment at the bottom of the hole before the underwater concrete is poured is not more than 20 cm;
s7, a steel reinforcement cage is placed, a crane is used for hoisting the steel reinforcement cage, hoisting points are symmetrically arranged at the joint of a steel reinforcement cage stirrup and a main reinforcement about the axis of the steel reinforcement cage, a connecting line of the hoisting points penetrates through the axis of the steel reinforcement cage, the steel reinforcement cage is vertically placed into a drilled hole, the steel reinforcement cage is prefabricated in sections and hoisted in sections, the steel reinforcement cage is firstly inserted into the hole in the bottom section, a guide frame is used for fixing the steel reinforcement cage in the hole opening, a crane hoists the upper steel reinforcement cage, the upper steel reinforcement cage is aligned with the bottom steel reinforcement cage, the main reinforcement is welded, the stirrup is wound according to the design after the main reinforcement is welded, then the steel reinforcement cage is inserted into the hole, and the guide frame is removed after;
s8, pouring underwater concrete, injecting water into the guide pipe, pressing by using an air compressor, simultaneously checking whether the guide pipe has a water leakage point, after the guide pipe is installed, enabling the bottom of the guide pipe to be 30-50 cm away from the bottom of the hole, checking the thickness of sediments before pouring the underwater concrete, and simultaneously circulating slurry in the hole, wherein the thickness of the sediments is required to be not more than 10 cm. If the thickness of the sediments exceeds the specification requirement, performing secondary hole cleaning by using the guide pipe, circulating slurry in the hole, detecting the slurry, calculating the required amount of the first-tray concrete, ensuring that the depth of the guide pipe embedded in the concrete after the first-tray concrete is poured is not less than 1.0m, filling a gap at the bottom of the guide pipe, and embedding a guide pipe opening into the concrete for at least 1.0m in the whole concrete pouring time;
the first plate concrete can adopt a free plug water-proof (inflatable bladder), the diameter of the bladder can freely pass through the guide pipe, the bladder and the conical plug are put into the hopper in actual operation, when the hopper is filled with concrete, the conical plug is immediately pulled up, the concrete is continuously added into the hopper, and the concrete is continuously poured;
after the first pouring is finished, pouring concrete continuously slides into the guide pipe from the side of the funnel opening, and the pouring concrete cannot be fully filled at one time so as to avoid generating bubbles, the pipe can be pulled out after the concrete pouring depth and the guide pipe burial depth are accurately measured, the pipe burial depth is not more than 6m and not less than 2m, and a certain height is added above the designed elevation of the pile top for ensuring the pile top quality, generally 0.5m (standard 1 m). When the pouring is nearly finished, the height of the concrete column in the guide pipe is reduced, the overpressure is reduced, if the concrete is difficult to lift, the buried depth of the guide pipe can be properly reduced, so that the pouring work is smoothly carried out, the speed is slow when the last section of long guide pipe is pulled out, and the mud at the upper part in the hole is prevented from being pressed into the pile;
with reference to fig. 7, after a pile casing 5 is buried, a positioning frame 4 is additionally arranged on the outer side of the pile casing 5, the positioning frame 4 is made of i-steel and is square, i-steel inclined struts are additionally arranged at four corners of the positioning frame 4, after the positioning frame 4 is processed, the positioning frame 4 is hoisted by using an automobile, the center of the positioning frame 4 is aligned to the center of the pile casing 5 and is righted by a worker, after the positioning frame 4 is put down in place, gaps between the positioning frame 4 and a hole wall are filled with cement mortar, the periphery of the positioning frame 4 is fixed by using bolts, and when the positioning frame 4 is disassembled after step S8 is completed, the lower ends of lifting ropes are respectively connected with the four corners of the positioning frame 4 through four branch lifting ropes, so that collision between the;
with reference to fig. 2-6, a guiding frame for positioning and guiding the reinforcement cage is supported above the drilled hole, the guiding frame comprises a guiding frame 2 which is adjusted to be attached to the outer wall of the reinforcement cage and a supporting base 1 which is fixed on the ground, the supporting base 1 is connected with the outer wall of the reinforcement cage through a connecting frame, the guiding frame 2 comprises two first frames 21 which are directly connected with the connecting frame, the two first frames 21 are arranged in parallel and form a structure with adjustable relative distance, the two first frames 21 can be connected with the connecting frame 3 through an air cylinder, a sliding groove can be additionally arranged at the upper end of the connecting frame 3, the two ends of the first frames 21 are provided with sliding blocks which are matched with the sliding groove, the first frames 21 slide along the sliding groove through the sliding blocks to realize the adjustment of the relative position between the two first frames 21, the two first frames 21 are respectively sleeved with two second frames 22 through the two ends, the two second frames 22 are internally provided with strip-shaped through grooves 221, the two end parts of the first frame 21 and the second frames 22 are uniformly provided with a plurality of connecting holes a, and when the position of the reinforcement cage is positioned, the first frame 21 and the second frame 22 are adjusted to be attached to the outer wall of the reinforcement cage and then fixed by penetrating through the connecting holes a on the first frame 21 and the second frame 22 through bolts;
the two first frames 21 are correspondingly provided with positioning holes 211, the through grooves 221 of the two second frames 22 are correspondingly provided with arc-shaped positioning grooves 222, the reinforcement cage is placed at a designated position and then is fixed at the position of the reinforcement cage below by penetrating through the corresponding positioning holes 211 and the corresponding positioning grooves 222 by using positioning rods, the positioning holes 211 are kidney-shaped holes, the upper end part and the lower end part in the positioning holes 211 are connected with two arc-shaped first fixing plates 212 with opposite openings through springs b, the two positioning grooves 222 used for fixing the same positioning rod are oppositely arranged at the upper side and the lower side of the through grooves 221, the positioning grooves 222 corresponding to the upper side and the lower side of the same through groove 221 are connected with arc-shaped second fixing plates 223 with opposite openings through springs b, the supporting base 1 is of a T-shaped structure, the connecting frame 3 is connected with one side of the supporting base 1 through a lifting cylinder, and the, the relative ground of fixed position of the steel reinforcement cage of leading to the below can adjust when the steel reinforcement cage overlap joint, make things convenient for the workman to weld the steel reinforcement cage and the welding department goes on around muscle work, seted up vertical spread groove 11 on the vertical part of support base 1, be equipped with on link 3 with the connecting block 31 of 11 looks adaptations of spread groove, the tip of connecting block 31 inlays and is equipped with ball 32, connecting block 31 passes through the inner wall contact of ball 32 with spread groove 11.
The guide frame is used as follows:
the guide frames are divided into two parts, the two guide frames are symmetrically arranged on two sides of the drill hole relative to the diameter of the drill hole, the positions of the two guide frames are adjusted, the distance between the symmetrical diameters of the first frame 21 and the two guide frames on the two guide frames is equal, the supporting base 1 is fixed on the ground by using bolts, when the reinforcement cage is placed to a hole opening, the relative position between the two first frames 21 and the two second frames 22 is adjusted, the inner walls of the first frames 21 and the second frames 22 are attached to the side wall of the reinforcement cage, the positions of the connecting holes a on the first frames 21 and the second frames 22 can be set according to the diameter of the type of the common reinforcement cage, the first frames 21 and the second frames 22 are fixed by using bolts, in the process of placing the reinforcement cage, the guide frames guide the placement of the reinforcement cage, the accuracy of the placement of the reinforcement cage is increased, and the reinforcement cage is prevented from deviating from a preset route in the process of, the shaking of the reinforcement cage in the lowering process can be reduced, and the situation that earth on the wall of the drill hole falls to the bottom plate of the drill hole to increase sediments in the drill hole due to rubbing between the reinforcement cage and the inner wall of the drill hole when the reinforcement cage is lowered is further prevented;
when first section steel reinforcement cage transfers near the entrance to a cave, use the locating lever to insert two locating holes 211 that first frame 21 is relative, in two constant head tanks 222 that second frame 22 is relative, locating lever and steel reinforcement cage owner muscle, the junction contact of stirrup, fix the position of steel reinforcement cage, continue to use the loop wheel machine to hoist another steel reinforcement cage and dock with fixed steel reinforcement cage, the workman welds two steel reinforcement cages and carries out the stirrup to the butt joint department as required, can adjust the fixed position of steel reinforcement cage as required simultaneously, so that further make things convenient for workman's weldment work, accomplish behind the weldment work, directly take the locating lever out, can continue to transfer the steel reinforcement cage, accomplish after the steel reinforcement cage transfers, with the leading truck demolish can, the efficiency of construction and the quality of stake joining pole have been promoted.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. The pile-splicing construction method comprises the following steps:
s1, leveling a construction site, removing sundries, leveling and rolling;
s2, construction lofting, namely roughly releasing the position of a pile casing by using a GPS and a total station, simultaneously arranging pile guards around by using thin steel wires, and accurately positioning the center point of a pile foundation by using a cross lofting mode;
s3, embedding a pile casing, excavating a pile casing foundation by adopting an excavator, reinforcing a slope of the pile casing, and measuring vertical deviation by using a plumb bob or a horizontal ruler;
s4, selecting a drilling machine, selecting a proper drilling machine according to the geological condition and the surrounding field condition, and checking the performance state of the drilling machine in advance to ensure that the drilling machine works normally;
s5, opening a hole, installing a guide pipe, preventing hole inclination and pile position deviation during hole opening, and supplementing water and prepared slurry into the hole in time after slag removal and drill stopping during the drilling process to keep the water level height, the slurry proportion and the viscosity in the hole;
s6, cleaning the holes, after checking and confirming that the drilled holes are qualified, cleaning the holes, leaving the drilling bucket in place, mechanically rotating for a plurality of circles, loading sediment at the bottom of the holes into the rotary excavating bucket, lifting the drilling bucket to throw away slag;
s7, lowering the reinforcement cage, using a crane to hoist the reinforcement cage, wherein lifting points are symmetrically arranged at the joint of the reinforcement cage stirrup and the main reinforcement about the axis of the reinforcement cage, connecting lines of the lifting points penetrate through the axis of the reinforcement cage, and the reinforcement cage is vertically lowered into the drilled hole;
s8, underwater concrete pouring, injecting water into the guide pipe, pressing by using an air compressor, simultaneously checking whether a water leakage point exists in the guide pipe, checking the sediment thickness after the guide pipe is installed, enabling the bottom of the guide pipe to be 30-50 cm away from the bottom of a hole, circulating slurry in the hole, detecting the slurry, calculating the required dosage of the first-tray concrete, ensuring that the depth of the guide pipe embedded in the concrete after the first-tray concrete pouring is not less than 1.0m, and embedding the opening of the guide pipe into the concrete for at least 1.0m in the whole concrete pouring time;
it is characterized in that in the process of implementing the step S7, a guide frame for positioning and guiding the reinforcement cage is arranged above the drill hole, the guide frame comprises a guide frame which is attached to the outer wall of the reinforcement cage after being adjusted and a support base which is used for being fixed on the ground, the supporting base is connected with the outer wall of the guide frame through a connecting frame, when a steel reinforcement cage enters a hole, the lifting points are symmetrically arranged at the connecting positions of the stirrups of the reinforcement cage and the main reinforcements relative to the axis of the reinforcement cage, the connecting lines of the lifting points penetrate through the axis of the reinforcement cage, and in the process of lowering the reinforcement cage, vertically lowering the steel reinforcement cage into the drill hole through the guide frame, lowering the steel reinforcement cage to a designated position first and needing to be lapped with the steel reinforcement cage then, fixing the steel reinforcement cage below by using the positioning rod to penetrate through the guide frame and the steel reinforcement cage, the connecting line of at least two contact points of the positioning rod and the reinforcement cage is intersected with the axis of the reinforcement cage;
the guide frame comprises two first frames directly connected with the connecting frame, the two first frames are arranged in parallel and form a structure with adjustable relative distance, the two first frames are respectively sleeved with two second frames through two end parts of the two first frames, strip-shaped through grooves are formed in the two second frames, a plurality of connecting holes are uniformly formed in the two end parts of the first frames and the second frames, and when the position of the reinforcement cage is positioned, the first frames and the second frames are adjusted to be attached to the outer wall of the reinforcement cage and then fixed through the connecting holes in the first frames and the second frames by bolts;
the support base is of a T-shaped structure, a vertical connecting groove is formed in the vertical portion of the support base, a connecting block matched with the connecting groove is arranged on the connecting frame, a ball is embedded in the end portion of the connecting block, and the connecting block is in contact with the inner wall of the connecting groove through the ball.
2. The pile extension column construction method according to claim 1, wherein in the step S7, positioning holes are correspondingly formed in the two first side frames, arc-shaped positioning grooves are correspondingly formed in the through grooves of the two second side frames, and after the reinforcement cage is lowered to a predetermined position, the positioning rod is used to pass through the corresponding positioning hole and positioning groove to fix the position of the reinforcement cage located below.
3. A pile extension construction method according to claim 2, wherein the positioning hole is a kidney-shaped hole, and upper and lower end portions in the positioning hole are connected to two arc-shaped first fixing plates having opposite openings by a spring.
4. A pile extension construction method according to claim 2, wherein two positioning grooves for fixing the same positioning rod are formed on upper and lower sides of the through groove, and the positioning grooves corresponding to the upper and lower sides of the through groove are connected to second arc-shaped fixing plates having opposite openings by springs.
5. A pile driving construction method according to claim 2, wherein the connecting frame is connected to the support base by a lifting cylinder, and the guide frame is configured to adjust a fixing position of a reinforcement cage located below with respect to the ground when the reinforcement cage is overlapped.
6. A pile extension column construction method as claimed in claim 1, wherein in the step S3, a positioning frame is added on the outer side of the pile casing, the positioning frame is made of i-steel and is square, i-steel diagonal braces are added at four corners of the positioning frame, after the positioning frame is processed, the pile casing is hoisted by using an automobile, the center of the positioning frame is aligned with the center of the pile casing, the pile casing is centered by a worker, after the positioning frame is put down in place, gaps between the pile casing and the hole wall are filled with cement mortar, and the periphery of the positioning frame is fixed by bolts.
7. The pile extension construction method according to claim 6, wherein when the spacer is removed after the step S8 is completed, lower ends of the lifting ropes are connected to four corners of the spacer through four sub-lifting ropes, respectively.
8. A pile extension column construction method according to claim 1, wherein a funnel is connected to an uppermost segment of the guide tube, an inflatable bladder is put into a joint of the funnel and the guide tube when first-tray concrete pouring is performed, the bladder has a diameter smaller than that of the guide tube and can freely pass through the guide tube, a cone plug is used for blocking the joint of the funnel and the guide tube, the cone plug is immediately pulled out when the funnel is filled with concrete, the concrete is continuously added into the funnel, the concrete is continuously poured, the concrete continuously slides into the guide tube from the side of a funnel opening after the first concrete pouring is completed, and meanwhile, the funnel is prevented from being filled with the concrete.
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| CN111594056B (en) * | 2020-06-11 | 2021-08-20 | 湖北鄂东桩基工程有限公司 | Water mill drill construction device and construction process thereof |
| CN113529728A (en) * | 2021-07-17 | 2021-10-22 | 南京桥新建设有限公司 | Steel reinforcement cage guiding device for cast-in-place pile construction and construction method |
| CN115288129B (en) * | 2022-08-15 | 2024-04-02 | 南京南部路桥建设(集团)有限公司 | Combined tool for lowering reinforcement cage and concrete pouring guide pipe |
| CN115419059A (en) * | 2022-08-30 | 2022-12-02 | 中铁七局集团武汉工程有限公司 | Pile foundation construction method suitable for complex geology |
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