CN212865915U - Special machine tool for realizing drilling cast-in-place pile without chiseling pile head - Google Patents

Abstract

The utility model discloses a realize drilling bored concrete pile and exempt from special machines of chisel pile head, including filling rack and electronic spiral drilling machine, the bottom of filling the rack is equipped with the steel and protects a section of thick bamboo, fill the rack with a steel protects a section of thick bamboo fixed connection, a steel protects a section of thick bamboo below and is equipped with a inside lining steel section of thick bamboo, a inside lining steel section of thick bamboo pass through the steel pipe with fill rack fixed connection, the top of filling the rack is equipped with the angle steel bracket, fill the rack with angle steel bracket fixed connection. The utility model discloses a special machines and tools that realize drilling bored concrete pile exempt from to chisel pile head can be general in pile footpath 600~1200mm drilling bored concrete pile foundation construction, have positioning reinforcement cage, control owner muscle interval concurrently, prevent to float cage, exempt from to chisel functions such as pile head, the efficiency improves the work efficiency, simplifies the process, saves a large amount of manual works and mechanical cost, alleviates workman intensity of labour for the construction progress to can have enough to meet the need the use many times.

Description

Special machine tool for realizing drilling cast-in-place pile without chiseling pile head

Technical Field

The utility model relates to a drilling bored concrete pile foundation construction technical field particularly, relates to a realize drilling bored concrete pile and exempt from special machines of chisel pile head.

Background

The cast-in-situ bored pile has the advantages of mature construction process, high bearing capacity, low construction cost and the like, has higher safety and higher stability, is widely applied to construction of engineering foundation structures such as industrial and civil buildings, high-grade highways, railway bridges and the like, and is more suitable for urban environments with dense population and buildings because of no vibration, low noise and no soil squeezing effect during construction.

In the process of pouring the pile body concrete, as bubbles or pores in the concrete rise to the part of the pile top in the vibration process, the pile top is floating slurry within a certain range or impurities precipitated by pile bottom sediment and slurry in the underwater concrete pouring process, in order to ensure the concrete strength of the pile body, the elevation of the pile top is generally over-poured by a certain height compared with the design elevation, and the over-poured part of the pile top is chiseled after the foundation pit of the bearing platform is excavated. The standard height of 5.1.4 specified pile tops in the acceptance Standard of construction quality of foundation engineering of building foundations (GB 50202-2002) is at least 0.5m higher than the designed standard height.

In the prior art, a method of manually breaking and chiseling a pile head by using a cutting saw, an air compressor, an air pick and the like is generally adopted. The disadvantages of this conventional method are: due to the fact that the thickness of the longitudinal main reinforcement protective layer of the cast-in-situ bored pile is not uniform, when the pile body is cut circularly, the cutter is easy to cut the reinforcement, serious damage to the quality of the structure is caused, the speed of manually stripping the reinforcement is low, and the efficiency is low; in the process of breaking and chiseling the pile head, the situations that the reserved steel bars on the pile top are cut off too short or are distorted and deformed, and the embedded acoustic detection pipe is damaged and blocked occur occasionally, so that the construction of the next procedure is seriously influenced; the vibration and the rigidity of the pneumatic pick force the pile head to be brittle-broken, and the pile head has a certain damage effect on the small-diameter pile foundation; the operation process is complicated, the field operation amount is large, the mechanical and manual input cost is high, the labor intensity of workers is high, and the working efficiency is low; the occupied construction period is long, and the reasonable and compact process connection is not facilitated; the field is limited during the excavation of the foundation pit, the broken pile heads are various in mechanical types, scattered in storage and use, densely distributed in power supply lines, easy to disorder in field management and difficult to effectively guarantee safe and civilized construction; the electric machine has large power consumption, obvious energy consumption but low utilization rate, and belongs to a process mode with high energy consumption and high cost; a large amount of construction waste which cannot be recycled is generated on site, environmental pollution such as waste water, dust, noise and the like is caused by pile body cutting and pneumatic pick breaking, the ecological environment is harmed, and the energy conservation, the land conservation, the water conservation, the material conservation and the environmental protection are not favorably realized.

At present, a novel construction process for breaking the pile head of the cast-in-situ bored pile is lacked, more emphasis is placed on the traditional method, the technology is slowly updated, and the defects of the traditional construction method always exist.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned technical problem among the correlation technique, the utility model provides a realize drilling bored concrete pile and exempt from special machines of chisel pile head can overcome the above-mentioned not enough of prior art.

In order to achieve the technical purpose, the technical scheme of the utility model is realized as follows:

the utility model provides a realize drilling bored concrete pile and exempt from special machines of chisel pile head, is including filling rack and electronic spiral drilling machine, the bottom of filling the rack is equipped with the steel and protects a section of thick bamboo, fill the rack with a steel protects a section of thick bamboo fixed connection, the steel protects a section of thick bamboo below and is equipped with a inside lining steel section of thick bamboo, a inside lining steel section of thick bamboo pass through the steel pipe with fill rack fixed connection, the top of filling the rack is equipped with angle steel bracket, fill the rack with angle steel bracket fixed connection, electronic spiral drilling machine's drilling rod passes in proper order fill rack, steel and protect a section of thick bamboo, a inside lining steel section of thick bamboo, the upper portion cover of drilling rod is equipped with sharp slide bearing.

Further, the lining steel cylinder comprises a cylinder, an upper rib is arranged at the top of the cylinder, a lower rib is arranged at the bottom of the cylinder, the steel pipe penetrates through a slotted hole in the upper rib, the lower end of the steel pipe is flush with the lower rib, and the steel pipe is respectively connected with the upper rib and the lower rib in a welding mode.

Furthermore, all be equipped with the preformed hole that corresponds with pile foundation longitudinal reinforcement on the rib of upper edge, the lower limb.

Furthermore, the top end of the inner wall of the steel pipe is provided with threads.

Further, the pouring rack comprises two steel plate table tops, a rectangular frame is arranged between the two steel plate table tops, the steel plate table tops are connected with the rectangular frame in a welded mode, a round hole is formed in the center of each steel plate table top, a cylindrical steel plate corresponding to the round hole is arranged in the center of each rectangular frame, the middle of each rectangular frame is connected with the channel steel keel in a welded mode, and the channel steel keel is connected with the cylindrical steel plate in a welded mode.

Furthermore, a guide pipe support frame is arranged at the top of the perfusion rack, two sides of the guide pipe support frame are respectively connected with a pin shaft of the valve support plate, and a through hole is formed in the valve support plate.

Furthermore, steel plate stiffening ribs are arranged at the top, the middle and the bottom of the steel casing.

Further, the electric spiral drilling machine comprises a motor, the motor is connected with the drill rod through a flange, and the lower portion of the drill rod is provided with a spiral blade.

The utility model has the advantages that: the utility model discloses a realize that special machines of drilling bored concrete pile exempt from chisel pile head can be general in pile footpath 600~1200mm drilling bored concrete pile foundation construction, have the spacer bar cage concurrently, control owner muscle interval, prevent floating the cage, exempt from functions such as chisel pile head, it is numerous and diverse to have solved traditional broken chisel pile head technology, high in labor strength, the input cost is high, the construction cycle length, energy consumption is high, the distortion is cut to the reinforcing bar easily, the sounding pipe fragile blocks up, the pile head easily shakes defects such as destruction, thereby effectively improve the work efficiency, the simplified process, save a large amount of manual works and mechanical cost, alleviate workman intensity of labour, accelerate the construction progress, and can have enough to meet the need the use many times. Meanwhile, the resource investment and the energy consumption are reduced, the field civilized construction can be promoted, the environmental pollution of field construction garbage, waste water, dust, noise and the like is reduced, the purposes of energy conservation, land conservation, water conservation, material conservation and environmental protection are realized by green construction, and the method has good popularization value.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments 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 a lined steel cylinder according to an embodiment of the present invention;

fig. 2 is a schematic view of a rectangular frame according to an embodiment of the present invention;

fig. 3 is a three-dimensional schematic view of a rectangular frame according to an embodiment of the present invention;

fig. 4 is a schematic view of an irrigation rig according to an embodiment of the present invention;

fig. 5 is a schematic view of a catheter support stand according to an embodiment of the present invention;

fig. 6 is a schematic view of a catheter support stand with a valve support plate open according to an embodiment of the present invention;

FIG. 7 is a schematic view of a catheter support stand with a valve support plate closed according to an embodiment of the present invention;

fig. 8 is a three-dimensional schematic view of an irrigation rig according to an embodiment of the present invention;

FIG. 9 is a schematic view of an electric screw drill according to an embodiment of the present invention;

fig. 10 is a schematic view of a pile body rebar configuration;

FIG. 11 is a schematic view of a pile foundation pouring condition;

FIG. 12 is an electric screw drill installation schematic;

FIG. 13 is a schematic diagram of the operation of the electric screw drill;

fig. 14 is a three-dimensional schematic view of a special tool for realizing a drilling-free cast-in-situ pile head according to an embodiment of the present invention;

in the figure: 1. pouring rack, 2, steel casing, 3, lining steel cylinder, 4, steel pipe, 5, angle steel bracket, 6, linear sliding bearing, 7, electric spiral drilling machine, 8, drill rod, 9, cylinder, 10, upper rib, 11, lower rib, 12, preformed hole, 13, steel plate table top, 14, rectangular frame, 15, cylindrical steel plate, 16, channel steel keel, 17, conduit supporting frame, 18, valve supporting plate, 19, motor, 20, helical blade.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art all belong to the protection scope of the present invention.

As shown in fig. 14, according to the embodiment of the utility model provides a special equipment of realization drilling bored concrete pile exempt from chisel pile head, including pouring rack 1 and electronic spiral drill 7, the bottom of pouring rack 1 is equipped with the steel and protects a section of thick bamboo 2, pour into rack 1 with the steel protects 2 fixed connection of a section of thick bamboo, the steel protects 2 below of a section of thick bamboo and is equipped with inside lining steel section of thick bamboo 3, inside lining steel section of thick bamboo 3 pass through steel pipe 4 with pour into 1 fixed connection of rack, the top of pouring rack 1 is equipped with angle steel bracket 5, pour into rack 1 with 5 fixed connection of angle steel bracket, the drilling rod 8 of electronic spiral drill 7 passes in proper order pour into rack 1, steel and protect a section of thick bamboo 2, inside lining steel section of thick bamboo 3, the upper portion cover of drilling rod 8 is equipped with sharp slide bearing 6, sharp slide bearing 6.

The lining steel cylinder 3 comprises a cylinder 9, an upper rib 10 is arranged at the top of the cylinder 9, a lower rib 11 is arranged at the bottom of the cylinder 9, the steel pipe 4 penetrates through a slotted hole in the upper rib 10, the lower end of the steel pipe 4 is flush with the lower rib 11, and the steel pipe 4 is respectively connected with the upper rib 10 and the lower rib 11 in a welding mode. And the upper rib 10 and the lower rib 11 are respectively provided with a preformed hole 12 corresponding to the pile foundation longitudinal rib. And the top end of the inner wall of the steel pipe 4 is provided with threads.

The pouring rack 1 comprises two steel plate table tops 13, a rectangular frame 14 is arranged between the two steel plate table tops 13, the steel plate table tops 13 are connected with the rectangular frame 14 in a welded mode, a round hole is formed in the center of each steel plate table top 13, the center of each rectangular frame 14 is provided with a cylindrical steel plate 15 corresponding to the round hole, the middle of each rectangular frame 14 is connected with a channel steel keel 16 in a welded mode, and the channel steel keel 16 is connected with the cylindrical steel plate 15 in a welded mode. The top of the perfusion rack 1 is provided with a conduit support frame 17, two sides of the conduit support frame 17 are respectively connected with a valve support plate 18 through pin shafts, and the valve support plate 18 is provided with a through hole.

And steel plate stiffening ribs are arranged at the top, the middle part and the bottom of the steel casing 2.

The electric spiral drilling machine 7 comprises a motor 19, the motor 19 is connected with the drill rod 8 through a flange, and the lower part of the drill rod 8 is provided with a spiral blade 20.

The utility model discloses a realize drilling bored concrete pile and exempt from special machines and tools each part structure size and manufacturing method of chisel pile head as follows:

(1) steel cylinder for manufacturing pile head lining

The steel plate with the thickness of 6mm is rolled into a cylinder by a plate rolling machine, the height of the cylinder is 1000mm, the outer diameter of the cylinder refers to the design structure of a pile body reinforcing steel bar and is the same as the outer diameter of a reinforcing hoop of a reinforcing cage, reinforcing ribs of the steel plate with the thickness of 8mm are additionally welded at the top and the bottom of the steel cylinder, the width of the ribs is 50mm, single-side intermittent welding is adopted, and the height of a welding seam is 5 mm.

Drilling a phi 25 preformed hole on a lower edge rib of the steel cylinder according to the designed space of the longitudinal steel bar of the pile body, wherein the phi 25 preformed hole corresponds to the position of the longitudinal steel bar of the pile body; on the upper rib of the steel cylinder, an inscribed regular triangle of the cylinder is drawn by a geometric method, the upper rib is trisected and marked, and a phi 40 slotted hole is drilled on the upper rib according to the bisection points.

Intercepting 3 DN25 welded steel pipes, wherein the outer diameter of each steel pipe is 38mm, the wall thickness is 6.5mm, the blanking length is the distance from the original ground elevation to the designed elevation of the pile top, namely the pile conveying length, the thread inner thread is sleeved on the upper part of each steel pipe, the thread length is 150mm, and the thread pitch of the inner thread is 2.0 mm.

Inserting the phi-40 slotted holes of the 3 welded steel pipes corresponding to the upper side ribs of the steel cylinder, enabling the bottoms of the 3 welded steel pipes to be flush with the lower side ribs of the steel cylinder, enabling the welded steel pipes to be attached to the outer wall of the steel cylinder, and then welding and fixing the welded steel pipes with the steel cylinder, the upper side ribs and the lower side ribs respectively, wherein the height of a welding line is 6 mm.

3M 25 fixing bolts are prepared for standby, the bolts are 660mm long and are provided with double nuts.

The detail of the pile head lining steel cylinder is shown in figure 1.

(2) Manufacturing steel casing

The steel protects a section of thick bamboo and adopts 12mm thick steel sheet book system, and height 1.2m, top, middle part and bottom add the steel sheet stiffening rib that welds 10mm thick, and steel protects a section of thick bamboo joint welding closely knit, full, must not leak thick liquid, and steel protects a section of thick bamboo internal diameter and is greater than design stake footpath 200 mm.

(3) Making concrete pouring rack

Cutting 4 16# channel steels according to the size requirement, vertically welding the channel steels into a rectangular channel steel frame of a perfusion rack, symmetrically drilling 4 phi 18 bolt holes in the longitudinal frame left and right for connecting a guide pipe support frame, and welding 4 10# channel steel keels in the middle of the channel steel frame according to the structure shown in the figure 3; rolling a steel plate with the width of 100mm and the thickness of 6mm into a cylinder, wherein the radius R = D-50mm (D is the radius of a pile foundation), and welding the steel plate centrally with a 10# channel steel keel to be used as a pile position reserved hole; cutting a circular hole with the same diameter in the middle of a steel plate with the thickness of 6mm according to a pile position reserved hole, and then welding the circular hole with the plane of a channel steel frame of a pouring rack to be used as a steel plate table top; on the steel plate table surface, the center of a steel pipe is welded corresponding to DN25 of the pile head lining steel cylinder, and 3 phi 28 bolt holes are drilled for penetrating M25 fixing bolts to be integrally connected. The structure of the perfusion rack frame is shown in figure 2, the three-dimensional schematic diagram of the perfusion rack frame is shown in figure 3, and the manufacturing schematic diagram of the perfusion rack table top is shown in figure 4.

4 pieces of 8# channel steel are cut out according to the size requirement and are vertically welded into a catheter support frame, the length of the support frame is the same as the width of a perfusion rack frame, and 4 phi 18 bolt holes are symmetrically drilled at two ends of a longitudinal frame of the support frame and are used for connecting the perfusion rack frame; manufacturing an open-close type valve supporting plate by using a 10mm thick steel plate, reserving semicircular guide pipe through holes in the supporting plates on two sides respectively, wherein the diameter of each through hole is 10mm larger than the outer diameter of each guide pipe; the valve supporting plate is connected with the guide pipe supporting frame through a pin shaft and can be flexibly opened and closed. The detailed manufacturing diagram of the catheter support frame is shown in figure 5, the three-dimensional schematic diagram of the valve opening working condition is shown in figure 6, and the three-dimensional schematic diagram of the valve closing working condition is shown in figure 7.

And (3) respectively corresponding the pipe support frame and a phi 18 bolt hole on the perfusion rack frame, connecting and fixing by adopting an M16 bolt, and assembling a three-dimensional schematic diagram of the perfusion rack shown in figure 8.

(4) Electric screw-type drilling machine

The electric spiral drilling machine consists of a speed reduction torque motor, a drill rod, a spiral blade and a linear sliding bearing, wherein the motor is connected with the drill rod through a flange, a high-precision speed reduction gear box is configured, a speed reduction box is connected with a power input shaft and a power output shaft, the other end of the power input shaft is connected with the speed reduction torque motor, and the other end of the power output shaft is connected with the drill rod.

The reference length of the drill rod is +700mm of the pile feeding length, the method is suitable for the construction of the drilled pile with the pile feeding length within 1.8m, and when the pile feeding length exceeds 1.8m, the problem can be solved by lengthening the drill rod; the lower part of the drill rod is welded with a helical blade which wraps the drill rod, the diameter of the helical blade is 50mm below the inner diameter of the pile head lining steel cylinder, and the length of the helical blade is 1.2 m.

The upper part of the drill rod is provided with a linear sliding bearing, the outer side of the bearing is evenly welded with 3 angle steel brackets with the diameter of 75 × 6mm along the circumference, the tail ends of the angle steel brackets are reserved with a phi 28 bolt hole, the centers of the angle steel brackets correspond to the center of a DN25 welded steel pipe of the pile head lining steel cylinder, and the angle steel brackets are used for penetrating an M25 fixing bolt to be connected with a pouring rack.

The electric screw-type drilling machine is schematically shown in fig. 9, the electric screw-type drilling machine is schematically shown in fig. 12 in installation, and the electric screw-type drilling machine is schematically shown in fig. 13 in operation.

For the convenience of understanding the above technical solutions of the present invention, the above technical solutions of the present invention are explained in detail through specific use modes below.

The utility model discloses a realization drilling bored concrete pile exempts from to chisel special machines and tools of pile head's application method as follows:

(1) survey lofting

And (3) calculating the coordinates of the pile position according to the axis control net and a design drawing, accurately releasing the center of the pile position by using a total station and spraying a white ash line, controlling the lofting deviation within 5mm, and burying the pile protector in time after the self-inspection is qualified. The pile protection adopts 4 points led out in the longitudinal and transverse directions of the center of the pile position to control the center of the pile, 30-300 mm wooden piles are buried into the ground for 100mm, steel nails are nailed at the top of the pile, and the pile is protected by mortar or plain concrete.

(2) Embedding steel casing

The method comprises the steps of digging holes in an embedded pile casing by an excavator or a drilling machine, manually cleaning and forming, setting the diameter of the pile casing to be 400mm, fixing the pile position center by using a pile casing stay wire rope, leading the pile position center to the bottom of the hole by using a wire hammer, hoisting the pile casing to the hole by using a crane, burying the pile casing to the depth of 0.9m, and lifting the pile casing to the position 300mm higher than the ground. Connecting the top of the pile casing with a rope, hanging a vertical line, and moving the pile casing by a crane to ensure that the center of the pile casing is superposed with the center of the pile position, wherein the deviation is not more than 30 mm. And symmetrically filling and tamping soil around the pile casing, detecting the central position and the verticality of the pile casing again, measuring the top elevation of the pile casing, and calculating the drilling depth of the pile foundation according to the design elevation of the pile top.

(3) Drilling machine in-position drilling hole

Selecting a reasonable drilling machine and a drilling tool according to geological conditions and application conditions of various drilling machines, checking each preparation work of drilling holes before the drilling machine is in place, connecting pile guards, drawing a cross line to recover the center of a pile position, leveling the drilling machine to enable a drill frame to be vertical after the drilling machine is in place, starting the drilling machine, and drilling holes according to a conventional process.

And checking the geological condition after the drilling hole reaches the design depth, checking and accepting the hole depth, the hole diameter and the hole pattern, cleaning the hole for the first time, and strictly forbidding adopting a method for deepening the drilling hole depth to replace the hole cleaning operation.

(4) Manufacturing and installing reinforcement cage

The reinforcement cage is manufactured in a centralized manner in a reinforcement processing field, the reinforcement cage is manufactured in sections according to the arm length of a crane and the deformation of the reinforcement cage, the sections are preferably about 9m in length, and the reinforcement cage is hoisted and connected in sections by using an automobile crane.

The reinforcement cage is horizontally assembled in a processing yard, in order to enable the upper main reinforcement and the lower main reinforcement to be correctly aligned, short reinforcements are used for manufacturing positioning longitudinal reinforcements of a reinforcement cage mould frame, the mould frame is placed on the same horizontal plane according to the interval of 2.0-3.0 m and aligned with the central line, and then the longitudinal reinforcements with matched fixed length are placed on the mould frame in a straight mode; welding a stiffening hoop at every 2m of the inner side of the longitudinal rib, keeping the stiffening hoop perpendicular to the longitudinal rib, firstly performing spot welding for fixing, and then performing uniform welding; the stirrups are spiral stirrups, are fixed with the longitudinal bars at intervals of 1-1.5 m in a spot welding mode, and are bound on the rest parts; the outer side of a main reinforcement of the steel reinforcement cage is provided with positioning steel sheets of-60 multiplied by 4 multiplied by 356mm, the vertical interval is 2m, and each section is uniformly arranged along the circumference and is not less than 3 so as to ensure the thickness of a protective layer of the main reinforcement of the pile.

The detailed structure of the pile body steel bar is shown in figure 10.

The steel reinforcement cage is hoisted section by utilizing an automobile crane, a hoisting point is arranged at the position of a stiffening hoop at the uppermost layer of each section of the steel reinforcement cage and is symmetrically arranged, a special hoisting frame is arranged at the top opening of the steel reinforcement cage by adopting a double-rope three-point hoisting method, a big hook is used for hoisting the upper end of the steel reinforcement cage, a small hook is used for hoisting the lower part of the steel reinforcement cage, the big hook is lifted off the ground and falls on the small hook, the steel reinforcement cage is vertically hoisted, firstly, the first section of the steel reinforcement cage is hoisted into a hole, a steel pipe or profile steel is transversely crossed to temporarily place the steel reinforcement cage at the opening of a protective cylinder, then, the other section is hoisted, the upper longitudinal rib and the lower longitudinal rib at the joint are aligned to the axis, the hole wall is connected by adopting a.

(5) Steel cylinder for installing pile head lining

When the uppermost section of reinforcement cage is hoisted, a pile head lining steel cylinder is sleeved on the reserved steel bars on the pile top, the phi 25 reserved hole on the lower rib of the pile head lining steel cylinder is inserted corresponding to the reserved steel bars on the pile top, and the lower rib of the pile head lining steel cylinder falls on the uppermost stiffening hoop of the section of reinforcement cage. The pile head lining steel cylinder and the uppermost section of reinforcement cage are integrally hoisted in place, the designed elevation is checked, the upper layer stiffening hoop of the uppermost section of reinforcement cage is located at the designed elevation position of the pile top, and meanwhile, the pile head lining steel cylinder is located in the section range of the pile top over-grouting part and has the function of controlling the distance between the main ribs.

(6) Installation perfusion rack

After the steel reinforcement cage and the pile head lining steel cylinder are installed, a concrete pouring rack is installed on the steel pile casing, the position is adjusted to enable the pile position preformed hole and the guide pipe through hole to be consistent with the center of the pile position, the pouring rack and the steel pile casing are locked through respective connecting pieces by bolts, and sleepers are supported on the lower portion of the pouring rack and are temporarily anchored with the ground. Then 3M 25 fixing bolts are inserted into the phi 28 bolt holes reserved on the pouring rack, the lower ends of the bolts are connected with the threaded inner threads at the tops of the DN25 welding steel pipes on the pile head lining steel cylinder, the upper ends of the bolts are locked with the pouring rack by M25 nuts, the pile foundation steel reinforcement cage, the pile head lining steel cylinder and the pouring rack are connected into a whole and located on the same axis, the function of positioning the steel reinforcement cage is achieved, and the steel reinforcement cage is prevented from sinking, displacing or floating when concrete is poured.

(7) Installation conduit

The guide pipe is a special spiral screw thread guide pipe, the inner diameter is 220mm, the middle section is 2.6m long, the lowest section is 4-5 m long, and non-standard sections of 0.5m, 1m and 1.5m are equipped. The catheter is firm in manufacture, smooth and straight in inner wall and free of local concave-convex. Before the guide pipes are used, the specifications, the quality and the splicing structure of the guide pipes are checked, trial splicing and pressure testing are carried out, the length of the guide pipes is calculated according to the hole depth and the height of a filling rack, the guide pipes are numbered from bottom to top in sequence, the combination sequence of the guide pipes is strictly kept, each group of guide pipes cannot be used in a mixed mode, and the axial difference after the guide pipes are spliced does not exceed 0.5% of the hole depth.

The pipe adopts crane cooperation manual installation, and the pipe position is in the steel reinforcement cage center, opens the valve backup pad on filling the rack, and manual work cooperation is held up steady section by section steady vertical sinking, prevents to block and hang the steel reinforcement cage and collide the pore wall. After each section of guide pipe is hung, the valve supporting plate is closed, the guide pipe reinforcing hoop is clamped by the supporting plate and temporarily fixed, and the sealing ring is placed at the position of the guide pipe interface and is continuously installed after being connected with the next section of guide pipe through the quick threaded connector.

After the guide pipe is placed to the bottom of the hole, the guide pipe is lifted by a crane, the distance between the bottom of the guide pipe and the bottom of the hole is kept to be about 400mm, the guide pipe is positioned in the center of the hole, and the guide pipe is clamped and fixed by a valve support plate. When the guide pipe is installed, the actual length of the guide pipe is measured section by section according to the numbering sequence, and the record is made so as to conveniently master the pipe burying depth in the concrete pouring process.

(8) Sediment detection and secondary hole cleaning

And after the guide pipe is hung in place, immediately detecting the thickness of the sediment at the bottom of the hole, measuring the depth of the hole around the hole wall by adopting a measuring rope with a flat weight hung at the front end of the sediment, wherein the thickness of the sediment at the bottom of the hole before concrete pouring is not more than 50mm, if the thickness of the sediment does not meet the design requirement, carrying out secondary hole cleaning, and after the hole cleaning is qualified through field inspection, carrying out concrete pouring on the pile body.

(9) Cast-in-place pile foundation concrete

According to the actual situation on site, the concrete respectively adopts modes such as gravity flow, car pump, on-vehicle pump to get into the collecting hopper, then flows through the pipe and pours into. And if underground water exists in the holes and the drainage is difficult, adopting underwater concrete, wherein the slump of the underwater concrete is 180-220 mm, and the initial setting time is not less than 6 hours.

When the first batch of concrete is subjected to bottom sealing, a water-proof plug is added into a hopper, and the filling capacity is 1.2m³Above, the depth of the buried pipe is not less than 2.0m, the maximum buried depth is not more than 6m, concrete is strictly forbidden to scatter in the hole during pouring, and the difficulty in pouring caused by the increase of the pressure at the lower end of the guide pipe due to the increase of the thickness of the sediment layer is avoided.

Should carry out after the pouring begins continuously, in time measure downthehole and the interior concrete face's of pipe height, the buried depth control of pipe in the concrete is between 2~6m, once dial the pipe and can not exceed 4m, when promoting the dismantlement pipe, the pipe is movable from top to bottom and is guaranteed concrete compactness, should avoid the pipe slope or scrape and touch the steel reinforcement cage, the pipe washing of unloading is struggled the back and is put things in good order for subsequent use futilely, on-the-spot concrete pouring record table of filling in faithfully, pile foundation fills the operating mode sketch map and sees figure 11.

When the concrete is poured to the pile top, the height of the concrete exceeds the designed elevation of the pile top by more than 500mm and is not more than 750mm, so that the lining steel cylinder of the pile head can contain the concrete of the over-poured part of the pile top and the whole pile head is lifted out of the hole.

After the concrete is poured, the last section of guide pipe is slowly lifted, and when the guide pipe is about to leave the concrete surface, the guide pipe is shaken for several times so as to prevent the pile core from being not compact or mud from being clamped and influence the quality of the pile body.

(10) Draining accumulated water in the hole

And after the guide pipe is dismantled, the guide pipe support frame and the valve support plate on the pouring rack are dismantled, and the pile head lining steel cylinder is exposed by using accumulated water in the pumping hole of a slurry pump.

(11) Cutting pile head of spiral drilling machine

Before the concrete is initially set, the electric spiral drilling machine is hoisted in place by using a crane, a drill bit and a spiral blade at the lower part of the drilling machine are placed in a pile head lining steel cylinder, a drill rod is adjusted to vertically correspond to the center of a pile position, an angle steel bracket on a linear sliding bearing at the upper part of the drill rod is connected with a pouring rack, and the pile head lining steel cylinder, the pouring rack and the spiral drilling machine are connected into a whole and are positioned at the same axis center with the pile position by locking and fixing an M25 fixing bolt extending out of the top of the pile head lining steel cylinder.

And measuring the distance from the top of the pile head over-poured concrete to the top surface of the pouring rack by using a steel ruler, calculating the actual elevation of the pile top according to the elevation of the top surface of the pouring rack, further calculating the depth of the spiral drilling machine as follows, upwards measuring by taking the top surface of the pouring rack as a datum point, and marking on a drill rod.

h=（H1-L）-H2-0.05

In the formula: h is the drilling depth (m);

h1 is the top elevation (m) of the perfusion bench;

l is the distance (m) from the pile head to the top surface of the pouring rack;

h2 is designed column top elevation (m);

and starting the electric spiral drilling machine, enabling the drill bit to vertically penetrate into the concrete excessively poured on the pile top under the action of the torque of the motor, simultaneously enabling the drill rod to drive the spiral blades to rotatably cut the concrete excessively poured on the pile head, and enabling the drill rod to vertically penetrate into the footage under the constraint of the linear sliding bearing. And observing an elevation control point on the drill rod, stopping drilling when the drill bit reaches 50mm above the designed elevation of the pile top, and separating the cut pile top super-poured concrete from the effective pile body and storing the cut pile top super-poured concrete in the pile head lining steel cylinder.

(12) Integral hoisting, dismounting and cleaning

When the concrete is about to be initially set, the temporary connection and anchoring of the pouring rack, the steel casing and the ground are removed, 4-point binding is carried out on four corners of the pouring rack through 2 steel wire ropes, the pile head lining steel cylinder, the pouring rack and the spiral drilling machine are integrally lifted out of the hole by utilizing a truck crane, an M25 fixing bolt is removed, the spiral drilling machine and the pile head lining steel cylinder are sequentially detached, the concrete waste residues in the pile head lining steel cylinder are cleaned, mortar is cleaned, and a release agent is coated for continuous turnover use.

(13) Hanging steel-tapping protective cylinder

The steel casing buried in the hole opening is pulled out by using a truck crane, the steel casing is kept to be vertically lifted when being lifted, and the hole opening is provided with cover plate covering and fence protection measures. And a striking safety warning sign is set.

(14) Entering the next procedure

Excavating a pile cap foundation pit after the strength of the pile body concrete reaches 0.5Mpa, manually removing the reserved 50mm concrete above the designed elevation of the pile top, processing the pile head to be flat, cleaning and pre-embedding the ultrasonic detection pipe with the designed elevation of the pile top, and carrying out the next pile foundation detection and the pile cap construction.

To sum up, with the help of the above technical scheme of the utility model, the utility model discloses a special machines that realize drilling bored concrete pile and exempt from to chisel pile head have the spacer bar cage concurrently, control owner muscle interval, prevent to float the cage, exempt from functions such as chisel pile head, especially can cancel the process of breaking chisel pile head in drilling bored concrete pile traditional construction process, alleviate intensity of labour, reduce energy consumption, save a large amount of manual works and mechanical cost, reduce environmental pollution such as site operation rubbish, waste water, dust, noise, effectively improve the work efficiency, promote energy-concerving and environment-protective, realize reduce cost, the reduction of erection time, impel economic benefits's promotion.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (8)

1. The utility model provides a realize drilling bored concrete pile and exempt from special machines of chisel pile head, a serial communication port, including filling rack (1) and electronic spiral drilling machine (7), the bottom of filling rack (1) is equipped with the steel and protects a section of thick bamboo (2), fill rack (1) with a section of thick bamboo (2) fixed connection is protected to the steel, the steel protects a section of thick bamboo (2) below and is equipped with inside lining steel cylinder (3), inside lining steel cylinder (3) through steel pipe (4) with fill rack (1) fixed connection, the top of filling rack (1) is equipped with angle steel bracket (5), fill rack (1) with angle steel bracket (5) fixed connection, drilling rod (8) of electronic spiral drilling machine (7) pass in proper order fill rack (1), steel protect a section of thick bamboo (2), inside lining steel cylinder (3), the upper portion straight line slide bearing (6) of drilling rod (8), the outer wall of the linear sliding bearing (6) is fixedly connected with the angle steel bracket (5).

2. The special machine for realizing the chiseling-free pile head of the cast-in-situ bored pile is characterized in that the lining steel cylinder (3) comprises a cylinder (9), an upper rib (10) is arranged at the top of the cylinder (9), a lower rib (11) is arranged at the bottom of the cylinder (9), the steel pipe (4) penetrates through a slotted hole in the upper rib (10), the lower end of the steel pipe (4) is flush with the lower rib (11), and the steel pipe (4) is respectively in welded connection with the upper rib (10) and the lower rib (11).

3. The special machine for realizing the drilling-free pile head of the cast-in-place pile of the claim 2 is characterized in that the upper rib (10) and the lower rib (11) are provided with reserved holes (12) corresponding to the pile foundation longitudinal ribs.

4. The special machine for realizing the drilling-free pile head of the cast-in-situ bored pile according to claim 1, wherein the top end of the inner wall of the steel pipe (4) is provided with threads.

5. The special machine for realizing the chiseling-free pile head of the cast-in-situ bored pile according to claim 1, wherein the cast-in-situ gantry (1) comprises two steel plate table tops (13), a rectangular frame (14) is arranged between the two steel plate table tops (13), the steel plate table tops (13) are connected with the rectangular frame (14) in a welding mode, a round hole is formed in the center of each steel plate table top (13), a cylindrical steel plate (15) corresponding to the round hole is arranged in the center of each rectangular frame (14), the middle of each rectangular frame (14) is connected with the channel steel keel (16) in a welding mode, and the channel steel keel (16) is connected with the cylindrical steel plate (15) in a welding mode.

6. The special machine for realizing the chiseling-free pile head of the cast-in-situ bored pile according to claim 5, wherein a guide pipe support frame (17) is arranged at the top of the cast-in-situ rack (1), two sides of the guide pipe support frame (17) are respectively in pin connection with a valve support plate (18), and a through hole is arranged on the valve support plate (18).

7. The special machine for realizing the drilling-free cast-in-place pile drilling head as claimed in claim 1, wherein the top, the middle and the bottom of the steel casing (2) are provided with steel plate stiffening ribs.

8. The special machine for realizing the drilling-free pile head of the cast-in-situ pile is characterized in that the electric spiral drilling machine (7) comprises a motor (19), the motor (19) is connected with the drill rod (8) through a flange, and the lower part of the drill rod (8) is provided with a spiral blade (20).

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