CN111236221B - Construction process of rotary digging pile - Google Patents
Construction process of rotary digging pile Download PDFInfo
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- CN111236221B CN111236221B CN202010063624.3A CN202010063624A CN111236221B CN 111236221 B CN111236221 B CN 111236221B CN 202010063624 A CN202010063624 A CN 202010063624A CN 111236221 B CN111236221 B CN 111236221B
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000010276 construction Methods 0.000 title claims abstract description 26
- 238000001514 detection method Methods 0.000 claims abstract description 45
- 238000005553 drilling Methods 0.000 claims abstract description 23
- 230000002787 reinforcement Effects 0.000 claims abstract description 20
- 230000001681 protective effect Effects 0.000 claims abstract description 8
- 238000004140 cleaning Methods 0.000 claims abstract description 4
- 230000003014 reinforcing effect Effects 0.000 claims description 15
- 239000002689 soil Substances 0.000 claims description 14
- 239000002002 slurry Substances 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 238000011065 in-situ storage Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- 239000002893 slag Substances 0.000 claims description 3
- 230000000712 assembly Effects 0.000 claims 1
- 238000000429 assembly Methods 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 claims 1
- 230000007704 transition Effects 0.000 claims 1
- 238000009435 building construction Methods 0.000 abstract description 2
- 238000003780 insertion Methods 0.000 description 18
- 230000037431 insertion Effects 0.000 description 18
- 229910000831 Steel Inorganic materials 0.000 description 15
- 239000010959 steel Substances 0.000 description 15
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 13
- 235000017491 Bambusa tulda Nutrition 0.000 description 13
- 241001330002 Bambuseae Species 0.000 description 13
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 13
- 239000011425 bamboo Substances 0.000 description 13
- 238000007689 inspection Methods 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 4
- 230000003068 static effect Effects 0.000 description 4
- 230000004308 accommodation Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
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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
-
- 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
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Piles And Underground Anchors (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
The invention relates to a construction process of a rotary digging pile, which relates to the technical field of building construction and comprises the following steps: s1: measuring and releasing control points; s2: positioning a pile position; s3: installing an alignment mechanism; s4: embedding a protective cylinder; s5: drilling; s6: cleaning holes and checking; s7: putting down a reinforcement cage; s8: lowering the conduit; s9: pouring concrete; s10: pulling out the guide pipe and the protective cylinder; four rows of detection holes are formed in the outer wall of the pile casing, and the alignment mechanism comprises four supports, four detection wheels, a reset piece, an encoder and a computer, wherein the four detection wheels are arranged on the supports in a sliding mode and are rotatably installed on the supports, the reset piece is installed on the supports, the encoder is installed on the supports, and the computer is electrically connected with the encoder. The invention detects the rotation turns of the detection wheel through the encoder, and judges the inclination degree of the pile casing according to the movement difference, so as to adjust the stress of the pressed end of the pile casing in the embedding process, improve the embedding accuracy of the pile casing, reduce the possibility of subsequent re-embedding and improve the construction efficiency.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a construction process of a rotary digging pile.
Background
The rotary excavating machine is used as novel pile foundation construction equipment, has the advantages of high power, high drilling speed, high automation degree, flexibility and convenience in moving, accurate positioning, labor saving, safety in production, convenience in working, good environmental protection performance, low noise, high working efficiency, capability of saving construction period and cost and the like, and is widely used in construction engineering.
The Chinese invention with the publication number of CN109024572A discloses a rotary excavating pile construction method, which comprises the following implementation steps: before site construction, machining a steel plate by using a plate bending machine and welding the steel plate to form an all-steel pile casing, wherein the length of the all-steel pile casing is determined according to a geological survey report of a rotary pile construction site; step two, after the all-steel casing is processed, measuring and releasing are carried out to position the pile foundation; hoisting the all-steel casing by a crane, wherein the center of the all-steel casing is coincided with the positioning center; embedding an all-steel pile casing, penetrating through a sludge layer according to depth data reported by a geological survey, and extending to the inside of a soil layer which has a wall protection function and can be self-stabilized; fifthly, after the all-steel pile casing is buried, excavating operation is started in the all-steel pile casing through a rotary excavator, and the all-steel pile casing of a soil layer required by design is excavated; moving the rotary excavating machine away after hole forming, arranging a reinforcement cage below and inside the hole, and pouring concrete while pulling up the all-steel casing during operation; and step seven, digging out the surface laitance after the concrete pouring is finished.
The technical scheme has the following defects: in step three, the center of the all-steel pile casing can be aligned with the positioning center when the all-steel pile casing is just buried, but along with the process of burying, the center of the all-steel pile casing can be influenced by the reacting force of soil, so that the center is easy to deviate in the process of burying, if the center is aligned after being buried completely, the center is troublesome, if the center has deviation, the center needs to be pulled out and then positioned again for re-burying, the time is long, the efficiency is low, and the construction efficiency is influenced.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a construction process of a rotary digging pile, so that the embedding accuracy of a pile casing is greatly improved, the possibility of subsequent re-embedding is reduced, the time spent in re-embedding and adjusting is shortened compared with the time spent in re-adjusting while the pile casing is embedded, and the construction efficiency is improved.
The above object of the present invention is achieved by the following technical solutions:
a construction process of a rotary digging pile comprises the following steps:
s1: measuring and releasing control points, making a construction plane control net by professional measuring personnel, and calibrating a site datum line, a datum point, a measuring axis, a pile position and a ground elevation of the pile;
s2: positioning the pile positions, and releasing four control pile positions by using cross lines;
s3: the alignment mechanism is installed by taking the four control pile positions as datum points;
s4: embedding a pile casing, namely embedding the pile casing by taking four control piles and an alignment mechanism as references, wherein the top end of the pile casing is 0.3 m higher than the ground when the pile casing is embedded, statically pressing the pile casing into the soil through a rotary excavating bucket of a drilling machine and timely adjusting the pile casing according to the alignment mechanism, the top end of the pile casing is 20 cm higher than the ground and is kept horizontal, the embedding depth is 1.8 m, and the central vertical line of the pile casing is superposed with the central line of the pile;
s5: drilling, namely drilling in the protective sleeve by using a rotary drilling rig, modulating slurry in time according to stratum and hole depth changes in the drilling and hole forming process to ensure the hole forming quality, slowing down the footage speed, improving the consistency of the slurry, reducing the footage amount of each drilling round and ensuring the stability of the hole wall when entering a sand layer and a pebble layer;
s6: cleaning holes, checking, namely, placing a drill bit to the open ground, carrying out in-situ idle rotation, lifting a drill rod to unload a drill slag final hole, and measuring the perpendicularity and the drilling depth of the formed hole;
s7: placing a reinforcement cage, manufacturing the reinforcement cage on site, placing a group of reinforcement lugs on the main reinforcement at intervals of 2 meters along the length direction of the reinforcement cage, wherein 4 reinforcement lugs are arranged in each group and are uniformly arranged at intervals along the circumferential direction;
s8: placing the guide pipe, checking the tightness before placing, placing the guide pipe by a crane, wherein the lower end of the guide pipe is 0.3-0.5 m away from the bottom of the hole;
s9: pouring concrete, namely pouring the concrete into the guide pipe without interruption, wherein the guide pipe needs to be lifted in the pouring process, and the minimum depth of the guide pipe embedded in the concrete is not less than 2 meters and not more than 6 meters;
s10: after concrete is poured to a designed elevation, the guide pipe is pulled out, and the pile casing is pulled out;
it is provided with four rows of inspection holes, every row to protect on the section of thick bamboo outer wall and along the even interval of circumference the inspection hole is followed the even interval of length direction of protecting a section of thick bamboo sets up, alignment mechanism includes that four circumferences set up subaerial and lie in protect a outlying support, along with the setting of sliding of the radial direction of the circle that forms with four control stake on the support and rotate and install on the support and with the detection wheel of inspection hole block, install on the support and with reset piece, installation that the detection wheel is connected on the support and with the encoder that the detection wheel is connected, with the computer that the encoder electricity is connected.
Through adopting above-mentioned technical scheme, at the in-process that protects a section of thick bamboo and be buried underground, the detection wheel rotates under the drive of the inspection hole that protects a section of thick bamboo, the encoder detects the number of turns of rotation of detection wheel, form the movement distance of every detection wheel on the computer, thereby judge the slope degree that protects a section of thick bamboo according to the difference of movement distance, so that protecting the atress distribution of a section of thick bamboo quilt pressure one end in the adjustment of burying the in-process, thereby improve the accuracy that protects a section of thick bamboo buried underground greatly, reduce follow-up possibility buried underground again, and the limit is buried the limit and is adjusted, compare in the time shortening of readjustment cost, construction efficiency is improved. And the detection wheel slides on the bracket to meet the horizontal deviation of the pile casing when the pile casing inclines, and the possibility that the detection wheel is extruded to be damaged is avoided.
The invention may further be configured in a preferred example, a sliding frame is arranged on the support, a length direction of the sliding frame coincides with a radial direction of a circle formed by the four control piles, a sliding seat is arranged on the sliding frame in a sliding manner along the length direction of the sliding frame, the detection wheel is rotatably mounted on the sliding seat, and the reset piece includes a reset spring mounted on the sliding frame and connected with the sliding seat.
Through adopting above-mentioned technical scheme, the cooperation of frame and slide then provides the support for the skew of detecting the wheel that slides for protect a section of thick bamboo when the skew, detect the wheel not fragile, and reset spring's setting can make and detect the wheel and begin to support tightly on protecting a section of thick bamboo lateral wall, realizes real-time supervision's purpose, improves the accuracy nature of monitoring.
In a preferred example, the invention may be further configured that a distance sensor for detecting a moving distance of the slide carriage is disposed on the slide carriage, and the distance sensor is electrically connected to the computer and the encoder.
Through adopting above-mentioned technical scheme, because what detect the wheel monitoring is the length of movement route, if protect a vertical the burying, but the horizontal position has the deviation, still can influence the accuracy nature of burying the position. Through the setting of apart from the inductor, can monitor the skew of protecting a section of thick bamboo at horizontal position in step to further more accurate detection protects the position of a section of thick bamboo, so that in time adjust, improve the accuracy nature.
In a preferred example of the present invention, the alignment mechanism further includes a frame, the frame is square, the frame is provided with a channel, the four brackets are respectively disposed in the middle of four sides of the frame, four corners of the frame are provided with fixing legs, the frame is suspended by the fixing legs, and the fixing legs are fixed on the ground by the positioning assembly.
By adopting the technical scheme, the detection wheel needs a relatively stable environment during detection, the detection wheel has higher integrity and is more convenient to adjust through the arrangement of the rack and the fixing feet, and the stability during detection is greatly improved through the arrangement of the fixing feet; meanwhile, the rack is suspended, so that the influence of uneven soil or slight vibration of soil near the embedded pile casing on the rack is small, and the detection accuracy is improved.
In a preferred example, the invention may be further configured that, when the rack is placed, the four fixing feet are staggered with the four control piles, the opposite supports are connected by using wires, and the intersection point of the two wires is compared with the central point of the cross wire to determine the placement position of the rack.
By adopting the technical scheme, the position of the rack is determined, the center point of the cross line is aligned, the correctness of the reference position in the subsequent embedding process is ensured, the error is reduced, and the accuracy is improved.
In a preferred example of the present invention, the fixing leg may further include an insertion hole at an end thereof away from the frame, the positioning assembly includes a t-shaped insertion rod, a receiving groove penetrating through a vertical edge of the insertion rod is formed at a top end of the insertion rod, and a depth direction of the receiving groove is parallel to a length direction of the vertical edge of the insertion rod; a rebound spring is arranged at the bottom of the accommodating groove, a push block is arranged on the accommodating groove in a sliding manner, a magnetic ring is arranged on the outer wall of the push block, the push block is provided with two step sections, and the joint of the two step sections is transited through an inclined plane;
the vertical edge of the inserted bar is provided with a reinforcing thorn which penetrates into the accommodating groove in a sliding manner along the direction vertical to the length direction of the inserted bar, the reinforcing thorn can be sucked by the magnetic ring, and the reinforcing thorn can penetrate out of the outer wall of the vertical edge of the inserted bar under the pushing of the push block; the inserted bar is provided with a T-shaped operating rod in the accommodating groove in a threaded manner, and the push block is clamped between the operating rod and the rebound spring.
Through adopting above-mentioned technical scheme, when fixed foot of needs, pass the spliced eye with the inserted bar and insert in soil to rotate the action bars, the action bars moves along the holding tank, pushes down the ejector pad, and the ejector pad will consolidate the thorn and release the inserted bar and erect the limit outer wall, makes and consolidates the thorn and insert in soil, thereby improves the stability of inserted bar in soil. When the magnet ring needs to be taken out, the operating rod is rotated reversely, the rebound spring moves reversely under the action of the push block, the reinforcing thorn retracts into the inserted link under the attraction action of the magnet ring, and then the inserted link can be pulled out; and if the reinforcing thorn can not return to the inserted link due to the friction force of the soil, the inserted link can be forcibly pulled out.
The invention may further be configured in a preferred example, the support is slidably disposed on the frame, and a sliding direction of the support is parallel to the length direction of the sliding frame, and an adjusting assembly connected to the support is disposed on the frame.
By adopting the technical scheme, the diameters of the pile casings required to be used are different due to the fact that the diameters of the rotary excavating piles are different. Through the setting of sliding of support to through the position of adjusting part adjustment support, make the section of thick bamboo monitoring that protects that can satisfy different diameters, thereby improve the suitability.
The invention in a preferred example may be further configured such that the adjustment assembly includes a threaded rod rotatably mounted on the frame, and a linkage block mounted on the bracket and threadedly engaged with the threaded rod.
Through adopting above-mentioned technical scheme, when the position of needs adjustment support, rotate the screw rod, the screw rod drives the motion of linkage piece to realize the motion of support.
The invention may further be configured in a preferred example, the rack is rotatably provided with a worm along the length direction of the edge of the rack, one end of the screw is provided with a worm wheel meshed with the worm, the end part of the adjacent worm is meshed and driven through a bevel gear, and one end of any one worm is provided with a turntable.
By adopting the technical scheme, the low efficiency of step-by-step adjustment of the supports is considered, the synchronism cannot be ensured, and the position of each support is difficult to control to be the same. Through the setting of worm, worm wheel, when needs are adjusted, rotate the carousel, rotate and drive one of them worm and rotate, remaining three worm rotates in step, and the worm rotates and drives the worm wheel and rotate to realize the synchronous rotation of four screw rods, thereby can improve the efficiency of adjustment, can enclose into comparatively accurate circle.
In summary, the invention includes at least one of the following beneficial technical effects:
1. the rotation turns of the detection wheels are detected through the encoder, the movement distance of each detection wheel is formed on the computer, and therefore the inclination degree of the pile casing is judged according to the difference of the movement distances, so that the stress distribution of the pressed end of the pile casing is adjusted in the embedding process, the embedding accuracy of the pile casing is greatly improved, the subsequent embedding possibility is reduced, the embedding and adjusting are carried out simultaneously, the time spent in comparison with the re-adjusting is shortened, and the construction efficiency is improved;
2. the displacement of the protective cylinder in the horizontal position can be synchronously monitored through the arrangement of the distance sensor, so that the position of the protective cylinder is further more accurately detected, the adjustment is convenient in time, and the accuracy is improved;
3. through the setting of sliding of support to through the position of adjusting part adjustment support, make the section of thick bamboo monitoring that protects that can satisfy different diameters, thereby improve the suitability.
Drawings
FIG. 1 is a schematic representation of the three-dimensional structure of the present invention;
FIG. 2 is a cross-sectional view of the positioning assembly of the present invention;
fig. 3 is an enlarged schematic view of a portion a in fig. 1.
Reference numerals: 1. protecting the cylinder; 11. a detection hole; 2. a frame; 21. a channel; 22. a fixing leg; 23. a positioning assembly; 231. inserting a rod; 232. accommodating grooves; 233. a rebound spring; 234. a push block; 235. a magnetic ring; 236. reinforcing the spines; 237. an operating lever; 24. a slide rail; 25. an adjustment assembly; 251. a screw; 252. a linkage block; 253. a worm; 254. a worm gear; 255. a turntable; 3. a support; 31. a sliding frame; 32. a slide base; 33. detecting a wheel; 34. an encoder; 35. a return spring; 36. a distance sensor.
Detailed Description
The present invention is described in further detail below with reference to the attached drawings.
Referring to fig. 1, a construction process of a rotary excavating pile comprises the following steps:
s1: measuring and releasing control points, making a construction plane control net by professional measuring personnel, and calibrating a site datum line, a datum point, a measuring axis, a pile position and a ground elevation of the pile;
s2: positioning the pile positions, and releasing four control pile positions by using cross lines;
s3: the alignment mechanism is installed by taking the four control pile positions as datum points;
s4: embedding a pile casing 1, embedding the pile casing 1 by taking four control piles and an alignment mechanism as references, wherein the top end of the pile casing 1 is 0.3 m higher than the ground when the pile casing 1 is embedded, statically pressing the pile casing 1 into the soil through a rotary excavating bucket of a drilling machine and timely adjusting according to the alignment mechanism, the top end of the pile casing 1 is 20 cm higher than the ground and is kept horizontal, the embedding depth is 1.8 m, and the central vertical line of the pile casing 1 is superposed with the central line of the pile;
s5: drilling, namely drilling in the protective sleeve 1 by using a rotary drilling rig, modulating slurry in time according to stratum and hole depth changes in the drilling and hole forming process to ensure the hole forming quality, slowing down the footage speed when entering a sand layer and a pebble layer, improving the consistency of the slurry, reducing the footage amount of each drilling round, and ensuring the stability of the hole wall;
s6: cleaning holes, checking, namely, placing a drill bit to the open ground, carrying out in-situ idle rotation, lifting a drill rod to unload a drill slag final hole, and measuring the perpendicularity and the drilling depth of the formed hole;
s7: placing a reinforcement cage, manufacturing the reinforcement cage on site, placing a group of reinforcement lugs on the main reinforcement at intervals of 2 meters along the length direction of the reinforcement cage, wherein 4 reinforcement lugs are arranged in each group and are uniformly arranged at intervals along the circumferential direction;
s8: placing the guide pipe, checking the tightness before placing, placing the guide pipe by a crane, wherein the lower end of the guide pipe is 0.3-0.5 m away from the bottom of the hole;
s9: pouring concrete, namely pouring the concrete into the guide pipe without interruption, wherein the guide pipe needs to be lifted in the pouring process, and the minimum depth of the guide pipe embedded in the concrete is not less than 2 meters and not more than 6 meters;
s10: and after concrete is poured to the designed elevation, the guide pipe is pulled out, and the pile casing 1 is pulled out.
Four rows of detection holes 11 are uniformly arranged on the outer wall of the pile casing 1 at intervals along the circumferential direction, each row of detection holes 11 is provided with a plurality of detection holes 11, and the plurality of detection holes 11 are uniformly arranged at intervals along the length direction of the pile casing 1.
The aligning mechanism comprises a rack 2, the rack 2 is square, a channel 21 is formed in the center of the rack 2, fixing pins 22 are fixedly arranged at four corners of the rack 2, the rack 2 is in a suspended state through the four fixing pins 22, and the fixing pins 22 are fixed on the ground through positioning components 23.
Referring to fig. 2, an insertion hole is formed in one end of the fixing leg 22, which is away from the rack 2, the positioning assembly 23 includes a t-shaped insertion rod 231, an accommodating groove 232 penetrating through the top end of the insertion rod 231 to a vertical edge thereof is formed in the top end of the insertion rod 231, and a depth direction of the accommodating groove 232 is parallel to a length direction of the vertical edge of the insertion rod 231; the tank bottom of accommodation groove 232 is provided with resilience spring 233, and the flexible direction of resilience spring 233 is the same with the degree of depth direction of accommodation groove 232.
The holding groove 232 is provided with a push block 234 in a sliding manner, a magnetic ring 235 is fixedly sleeved on the outer wall of the push block 234, the push block 234 is provided with two step sections, the magnetic ring 235 is embedded on the two step sections, and the joint of the two step sections is excessive through an inclined plane. The vertical edge of the insertion rod 231 is provided with a reinforcing thorn 236 penetrating into the accommodating groove 232 in a sliding manner along the direction vertical to the length direction of the insertion rod, the reinforcing thorn 236 can be sucked by the magnetic ring 235, the reinforcing thorn 236 can penetrate out of the outer wall of the vertical edge of the insertion rod 231 under the pushing of the pushing block 234, and two ends of the resilient spring 233 always abut against the groove bottom of the accommodating groove 232 and one end, facing the groove bottom of the accommodating groove 232, of the pushing block 234.
The insertion rod 231 is screw-fitted with an operation lever 237 in a T-shape at the accommodation groove 232, and the push block 234 is clamped between the operation lever 237 and the resilient spring 233. The push block 234 can be pushed to move by rotating the insertion rod 231, so that the reinforcing thorn 236 is partially pushed out of the insertion rod 231 and is pierced into the soil, and the reinforcing effect is achieved.
Referring to fig. 1 and 3, a slide rail 24 is fixed in the middle of each of the four sides of the frame 2, the slide rail 24 points to the center of the frame 2, the support 3 is slidably disposed on the slide rail 24, and an adjusting assembly 25 connected to the support 3 is disposed on the frame 2. The adjusting assembly 25 comprises a screw 251 and a linkage block 252, two ends of the screw 251 are rotatably mounted on the slide rail 24, the linkage block 252 is fixedly connected to the bracket 3 and slides in the slide rail 24 and is in threaded fit with the screw 251, and the bracket 3 can be driven to slide on the slide rail 24 by rotating the screw 251. In order to synchronously adjust the four screws 251, the frame 2 is rotatably provided with the worms 253 along the length direction of the edge of the frame 2, one end of each screw 251, which is close to the edge of the frame 2, penetrates through the slide rail 24 and is fixedly provided with the worm wheel 254, the worm wheel 254 is meshed with the worm 253, the end parts of the adjacent worms 253 are meshed and driven through the bevel gears, one end of any worm 253 is fixedly provided with the turntable 255, so that the four worms 253 can be driven to synchronously rotate by rotating the turntable 255, the worm 253 can drive the worm wheel 254 to rotate by rotating the worm wheel 253, and the screw 251 can be driven to rotate by rotating the worm wheel 254.
When the rack 2 is placed, the four fixing feet 22 and the four control piles are staggered to form a regular octagon, the opposite supports 3 are connected by lines, and the junction of the two lines is compared with the central point of the cross line to determine the placement position of the rack 2.
A sliding frame 31 is fixedly arranged on the support 3, the sliding frame 31 horizontally faces to the center of the rack 2, and the length direction of the sliding frame 31 is overlapped with the radial direction of a circle formed by the four control piles; a slide base 32 is slidably provided on the sliding frame 31 along the longitudinal direction thereof, a detection wheel 33 is rotatably mounted on the slide base 32, the detection wheel 33 has a conical bayonet engaged with the detection hole 11, an encoder 34 is fixedly provided on the slide base 32, and the encoder 34 is used for detecting the number of rotations of the detection wheel 33. A reset piece is arranged on the bracket 3, the reset piece adopts a reset spring 35, one end of the reset spring 35 is fixedly connected to the sliding frame 31, and the other end of the reset spring is fixedly connected to the sliding seat 32; and a distance sensor 36 for detecting the moving distance of the slide carriage 32 is fixedly provided on the slide carriage 31. The elastic restoring force of the return spring 35 acts on the sliding seat 32, so that the detection wheel 33 on the sliding seat 32 always abuts against the outer wall of the protective cylinder 1. The alignment mechanism further comprises a computer, the computer is electrically connected with the distance sensor 36 and the encoder 34, the computer is used for displaying the detection records of the encoder 34 and the distance sensor 36, and comparing the detection records with data on different supports 3 to obtain a difference value so as to judge the inclination degree, and the detection result of the distance sensor 36 can show whether the position is deviated or not.
The working principle of the embodiment is as follows:
after the four control piles are positioned, the frame 2 is put on, and the wires are pulled on the opposite supports 3, so that the intersection point of the two wires is the same as the intersection point of the cross wire, and the four control piles are staggered with the fixing feet 22 of the four frames 2.
The insertion rod 231 is then inserted into the insertion hole of the fixing leg 22 and hammered or pressed into the soil by static pressure, and then the operation rod 237 is rotated to move the pushing block 234 in the receiving groove 232 and eject the reinforcing bar 236 to fix the same.
The bracket 3 is adjusted by rotating the rotary table 255 according to the diameter of the casing 1, and then the casing 1 can be put in and the latch of the detection wheel 33 can be engaged with the detection hole 11 of the casing 1, and then the casing 1 is statically pressed. In the static pressure process, the detection wheel 33 is driven by the pile casing 1 to rotate, the encoder 34 displays data on a computer according to the rotation of the detection wheel 33, meanwhile, in the static pressure process, the offset data of the sliding base 32 detected by the distance sensor can also be fed back to the computer, and a worker adjusts the force application position of static pressure on the pile casing 1 according to the fed-back data to ensure that the pile casing 1 can be vertically pressed down.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (5)
1. A construction process of a rotary digging pile is characterized in that: the method comprises the following steps:
s1: measuring and releasing control points, making a construction plane control net by professional measuring personnel, and calibrating a site datum line, a datum point, a measuring axis, a pile position and a ground elevation of the pile;
s2: positioning the pile positions, and releasing four control pile positions by using cross lines;
s3: the alignment mechanism is installed by taking the four control pile positions as datum points;
s4: embedding a pile casing (1), embedding the pile casing (1) by taking four control piles and an alignment mechanism as references, wherein the top end of the pile casing (1) is 0.3 m higher than the ground when the pile casing (1) is embedded, statically pressing the pile casing (1) into the soil through a rotary excavator bucket of a drilling machine and timely adjusting according to the alignment mechanism, the top end of the pile casing (1) is 20 cm higher than the ground and kept horizontal, the embedding depth is 1.8 m, and the central vertical line of the pile casing (1) is superposed with the central line of the pile;
s5: drilling, namely drilling in the protective cylinder (1) by using a rotary drilling rig, modulating slurry in time according to stratum and hole depth changes in the drilling and hole forming process to ensure the hole forming quality, slowing down the footage speed when entering a sand layer and a pebble layer, improving the consistency of the slurry, reducing the footage amount of each drilling cycle and ensuring the stability of the hole wall;
s6: cleaning holes, checking, namely, placing a drill bit to the open ground, carrying out in-situ idle rotation, lifting a drill rod to unload a drill slag final hole, and measuring the perpendicularity and the drilling depth of the formed hole;
s7: placing a reinforcement cage, manufacturing the reinforcement cage on site, placing a group of reinforcement lugs on the main reinforcement at intervals of 2 meters along the length direction of the reinforcement cage, wherein 4 reinforcement lugs are arranged in each group and are uniformly arranged at intervals along the circumferential direction;
s8: placing the guide pipe, checking the tightness before placing, placing the guide pipe by a crane, wherein the lower end of the guide pipe is 0.3-0.5 m away from the bottom of the hole;
s9: pouring concrete, namely pouring the concrete into the guide pipe without interruption, wherein the guide pipe needs to be lifted in the pouring process, and the minimum depth of the guide pipe embedded in the concrete is not less than 2 meters and not more than 6 meters;
s10: after the concrete is poured to the designed elevation, the guide pipe is pulled out, and the pile casing (1) is pulled out;
the device comprises a pile casing (1), a pile casing, an alignment mechanism, a detector and a controller, wherein four rows of detection holes (11) are uniformly arranged on the outer wall of the pile casing (1) at intervals along the circumferential direction, each row of detection holes (11) are uniformly arranged at intervals along the length direction of the pile casing (1), the alignment mechanism comprises four supports (3) with the circumferences arranged on the ground and positioned at the periphery of the pile casing (1), detection wheels (33) which are arranged on the supports (3) in a sliding manner along the radial direction of a circle formed by four control piles and rotatably installed on the supports (3) and clamped with the detection holes (11), a reset piece which is installed on the supports (3) and connected with the detection wheels (33), an encoder (34) which is installed on the supports (3) and connected with the detection wheels (33), and a computer which is electrically connected with the encoder (34);
a sliding frame (31) is arranged on the support (3), the length direction of the sliding frame (31) is overlapped with the radial direction of a circle formed by four control piles, a sliding seat (32) is arranged on the sliding frame (31) in a sliding mode along the length direction of the sliding frame, the detection wheel (33) is rotatably installed on the sliding seat (32), and the reset piece comprises a reset spring (35) which is installed on the sliding frame (31) and connected with the sliding seat (32);
a distance sensor (36) for detecting the moving distance of the sliding seat (32) is arranged on the sliding frame (31), and the distance sensor (36) is electrically connected with the computer and the encoder (34);
the aligning mechanism further comprises a rack (2), the rack (2) is square, a channel (21) is formed in the center of the rack (2), the four supports (3) are respectively arranged in the middles of four edges of the rack (2), fixing pins (22) are arranged at four corners of the rack (2), the rack (2) is suspended through the fixing pins (22), and the fixing pins (22) are fixed on the ground through positioning assemblies (23);
one end, far away from the rack (2), of each fixing foot (22) is provided with an inserting hole, each positioning assembly (23) comprises a T-shaped inserting rod (231), the top end of each inserting rod (231) is provided with an accommodating groove (232) penetrating to the vertical edge of the inserting rod, and the depth direction of each accommodating groove (232) is parallel to the length direction of the vertical edge of the inserting rod (231); a rebound spring (233) is arranged at the bottom of the accommodating groove (232), a push block (234) is slidably arranged on the accommodating groove (232), a magnetic ring (235) is arranged on the outer wall of the push block (234), the push block (234) is provided with two step sections, and the joint of the two step sections is in transition through an inclined plane;
the vertical edge of the inserted rod (231) is provided with a reinforcing thorn (236) which penetrates into the accommodating groove (232) in a sliding manner along the direction vertical to the length direction of the inserted rod, the reinforcing thorn (236) can be sucked by the magnetic ring (235), and the reinforcing thorn (236) can penetrate through the outer wall of the vertical edge of the inserted rod (231) under the pushing of the pushing block (234); the inserting rod (231) is provided with a T-shaped operating rod (237) in a threaded mode in the accommodating groove (232), and the pushing block (234) is clamped between the operating rod (237) and the rebound spring (233).
2. The construction process of the rotary excavating pile according to claim 1, characterized in that: when the rack (2) is placed, the four fixing feet (22) and the four control piles are staggered, the opposite supports (3) are connected through wires, and the junction of the two wires is compared with the central point of the cross wire to determine the placement position of the rack (2).
3. The construction process of the rotary excavating pile according to claim 1, characterized in that: the support (3) slides and is arranged on the rack (2), the sliding direction of the support (3) is parallel to the length direction of the sliding frame (31), and an adjusting component (25) connected with the support (3) is arranged on the rack (2).
4. The construction process of the rotary excavating pile according to claim 3, characterized in that: the adjusting assembly (25) comprises a screw rod (251) rotatably mounted on the frame (2), and a linkage block (252) mounted on the bracket (3) and in threaded fit with the screw rod (251).
5. The construction process of the rotary excavating pile according to claim 4, characterized in that: the worm (253) is rotatably installed on the rack (2) along the length direction of the edge of the rack, a worm wheel (254) meshed with the worm (253) is installed at one end of the screw rod (251), the end part of the adjacent worm (253) is in meshing transmission through a bevel gear, and a rotary disc (255) is arranged at one end of any one worm (253).
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111827284B (en) * | 2020-07-13 | 2022-03-04 | 中国建筑第八工程局有限公司 | Steel casing positioning device and construction method thereof |
| CN112281854B (en) * | 2020-11-25 | 2022-02-15 | 成都城投建筑工程有限公司 | Cast-in-situ bored pile construction device |
| CN113174940B (en) * | 2021-03-24 | 2022-04-26 | 深圳市粤建建筑工程有限公司 | Pile foundation casing center positioning device and positioning method thereof |
| CN113323053B (en) * | 2021-05-26 | 2023-11-28 | 广东信稳能控技术研究有限公司 | Pile pressing and digging machine for rotary pipe |
| CN114164828B (en) * | 2021-09-17 | 2023-01-03 | 山东源基建设工程有限公司 | Pile casing pulling-up auxiliary device for concrete pouring pile |
| CN114150664B (en) * | 2021-11-15 | 2023-04-07 | 中国地质调查局武汉地质调查中心 | Rapid construction device and method for prestressed basalt fiber anchor rod |
| CN114351748A (en) * | 2022-01-20 | 2022-04-15 | 南通雯华建筑规划设计有限公司 | Method for setting foundation pile of high-rise building foundation |
| CN114439404B (en) * | 2022-01-24 | 2023-01-24 | 重庆运满机械设备有限公司 | Drill bit fisher of rotary drilling rig |
| CN114508126B (en) * | 2022-02-24 | 2023-05-05 | 上海建工四建集团有限公司 | Rock zone steel pipe column reverse construction regulation and control device and construction method |
| CN114673154A (en) * | 2022-04-02 | 2022-06-28 | 中国一冶集团有限公司 | Protective cylinder positioning device and positioning method |
| CN117702727B (en) * | 2024-02-06 | 2024-06-14 | 江苏筑港建设集团有限公司 | Cast-in-place pile construction technology |
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