CN116409715B - Manufacturing and hoisting construction method for ultra-deep underground continuous wall reinforcement cage - Google Patents

Manufacturing and hoisting construction method for ultra-deep underground continuous wall reinforcement cage Download PDF

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Publication number
CN116409715B
CN116409715B CN202310637433.7A CN202310637433A CN116409715B CN 116409715 B CN116409715 B CN 116409715B CN 202310637433 A CN202310637433 A CN 202310637433A CN 116409715 B CN116409715 B CN 116409715B
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China
Prior art keywords
reinforcement cage
section
crane
main
control unit
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CN202310637433.7A
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CN116409715A (en
Inventor
孟庆红
谢祥明
吴海华
石青
张超
钟哲
崔雪
桂金鹏
李垚希
周勇臣
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Guangdong Yuehai Yuedong Water Supply Co ltd
Guangdong No 2 Hydropower Engineering Co Ltd
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Guangdong Yuehai Yuedong Water Supply Co ltd
Guangdong No 2 Hydropower Engineering Co Ltd
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Priority to CN202310637433.7A priority Critical patent/CN116409715B/en
Publication of CN116409715A publication Critical patent/CN116409715A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C13/00—Other constructional features or details
    • B66C13/04—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack
    • B66C13/08—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack for depositing loads in desired attitudes or positions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C13/00—Other constructional features or details
    • B66C13/16—Applications of indicating, registering, or weighing devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C13/00—Other constructional features or details
    • B66C13/18—Control systems or devices
    • B66C13/22—Control systems or devices for electric drives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C13/00—Other constructional features or details
    • B66C13/18—Control systems or devices
    • B66C13/46—Position indicators for suspended loads or for crane elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B66C23/84—Slewing gear
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/88—Safety gear
    • 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
    • E02D5/18—Bulkheads or similar walls made solely of concrete in situ
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)

Abstract

The invention relates to the field of building construction, in particular to a method for manufacturing and hoisting an ultra-deep underground wall reinforcement cage, which comprises the following steps: the lifting appliance is installed and inspected, and the steel reinforcement cage is horizontally hung by the main crane and the auxiliary crane at the same time; the first section of reinforcement cage is lifted to a first preset height, the main crane hooks, and the auxiliary crane moves in a matched mode and lifts the hooks; the main crane lifts the first section of reinforcement cage to a second preset height and rotates to one side, and the auxiliary crane rotates forward to enable the first section of reinforcement cage to be perpendicular to the ground; the main crane moves the first section of reinforcement cage to the position where the slot openings are aligned and then puts the first section of reinforcement cage into the slot, and the first section of reinforcement cage is positioned on the guide wall through square steel; repeating the steps to hoist the second section of reinforcement cage, and butting the first section of reinforcement cage with the second section of reinforcement cage; discharging shackles row by row until the main crane fully installs the shackles of the steel wire rope on the hanging rings at the top of the whole steel reinforcement cage, and continuously discharging the whole steel reinforcement cage to the designed elevation. According to the invention, the external force on the reinforcement cage is reduced by precisely matching the main crane with the auxiliary crane, so that the deformation of the reinforcement cage is reduced.

Description

Manufacturing and hoisting construction method for ultra-deep underground continuous wall reinforcement cage
Technical Field
The invention relates to the field of building construction, in particular to a method for manufacturing and hoisting an ultra-deep underground wall reinforcement cage.
Background
The double-machine lifting process is that the main and auxiliary cranes lift the reinforcement cage off the ground, and then the main crane lifts until the reinforcement cage is turned from flat to vertical. When the reinforcement cage enters the groove to the second hanging point of the main crane, the reinforcement cage is placed in the notch through the second placing point, the second hanging point sling of the main crane is loosened, and the reinforcement cage is connected with the hanging point conversion sling to finish hanging point conversion; and continuously lowering the reinforcement cage to a first lifting point of the main crane, placing the reinforcement cage at the notch at the first placing point again, and converting the sling to a cage top lifting ring to finally finish the lifting of the reinforcement cage.
The Chinese patent CN113353782A provides a quick hoisting construction method for a low-clearance ground wall-connected steel reinforcement cage, which comprises a construction preparation process, a steel reinforcement cage manufacturing process, a hoisting and lowering process and a steel reinforcement cage meeting the operation of each construction process, wherein the upper part of the steel reinforcement cage is provided with a main reinforcement, a truss, a cage top and a horizontal reinforcement, the upper part of the steel reinforcement cage is provided with a hoisting rigging, a winch and a hoisting point, the hoisting rigging comprises a pulley block, a small shoulder pole, a shackle A, a steel wire rope and a shackle B, the two ends of the steel wire rope are respectively connected with the small shoulder pole and the shackle B, and the problems of hoisting, turning back, entering a groove, connecting and the like of the underground continuous wall steel reinforcement cage are solved through a hoisting frame of hoisting equipment suitable for the low-clearance condition; however, the problem that the deformation of the reinforcement cage is large due to uneven stress distribution in the reinforcement caused by large combined force applied to the reinforcement cage during lifting exists.
Disclosure of Invention
Therefore, the invention provides a construction method for manufacturing and hoisting a reinforcement cage of an ultra-deep wall, which can solve the problem that the reinforcement cage is larger in deformation due to larger external force applied to the reinforcement cage caused by poor matching when a double crane lifts the large-sized reinforcement cage, and the internal stress of the reinforcement is unevenly distributed.
In order to achieve the above purpose, the invention provides a construction method for hoisting an ultra-deep wall-connected reinforcement cage, which comprises the following steps:
step S1, the main crane and the auxiliary crane reach the hoisting position, and after the installation condition and the stressed gravity center of the lifting appliance are checked, a first section of reinforcement cage is hoisted in a flat mode;
step S2, the main crane and the auxiliary crane horizontally lift the first section of reinforcement cage to a first preset height, and after the first section of reinforcement cage is confirmed to be stable, free of welding and deformation, the main crane lifts the hook, and the auxiliary crane moves and lifts the hook in a matched manner according to the ground clearance of the tail part of the first section of reinforcement cage;
step S3, when the main crane lifts the first section of reinforcement cage to a second preset height, the main crane rotates to one side, and the auxiliary crane rotates forward along the rotation direction of the main crane so that the first section of reinforcement cage is perpendicular to the ground, and then the auxiliary crane unloads the hooks;
step S4, the main crane moves the first section of reinforcement cage to the slot opening to be aligned accurately and put into the slot, the first section of reinforcement cage is horizontally positioned on the guide wall through square steel, when the main crane lowers the first section of reinforcement cage with power corresponding to the preset lowering speed, before the first section of reinforcement cage reaches the first preset lowering position, whether to stop lowering the first section of reinforcement cage is judged according to the change condition of the instantaneous speed of the first section of reinforcement cage in the lowering process, and the lifting height of the main crane to the first section of reinforcement cage is obtained according to the difference value between the instantaneous speed of the first section of reinforcement cage when the first section of reinforcement cage is judged to stop lowering and the preset lowering speed;
Step S5, repeating the steps S1 to S3 to hoist a second section of reinforcement cage, enabling the second section of reinforcement cage to be aligned with the first section of reinforcement cage in a natural vertical state, slowly lowering the second section of reinforcement cage to enable all groups of longitudinal main reinforcements to straighten in a straight direction, and enabling all groups of longitudinal main reinforcements at the butt joint positions of the first section of reinforcement cage and the second section of reinforcement cage to be connected through straight thread sleeves to form a whole reinforcement cage;
and S6, when the whole steel reinforcement cage is placed into the groove by the main crane, the whole steel reinforcement cage is placed down to the position of a third row of placing points, the steel reinforcement cage is lifted up after the shackles at the third row of hanging points are removed and connected with the steel wire ropes reserved at the second row of hanging points, the steel reinforcement cage is continuously placed down to the position of the second row of placing points after the square steel is removed, the steel reinforcement cage is lifted up after the shackles at the second row of hanging points are removed and connected with the steel wire ropes reserved at the first row of hanging points, the steel reinforcement cage is continuously placed down to the position of the first row of placing points after the square steel is removed, the shackles at the first row of hanging points are removed by the square steel positioning on the guide wall, and until the main crane installs the shackles of each steel wire rope on the top of the whole steel reinforcement cage, and the square steel reinforcement cage is continuously placed down to the design elevation by adopting the square steel positioning on the guide wall.
Further, in the step S2, the first control unit obtains a tension reading of each tension sensor arranged in the first steel shoulder pole connected with the main hook of the main crane, the second control unit obtains a tension reading of each tension sensor arranged in the second steel shoulder pole connected with the main hook of the auxiliary crane, and the tension reading is transmitted to the first control unit, and the first control unit determines whether the first section of reinforcement cage is stable according to a difference value between a maximum tension reading and a minimum tension reading in the tension readings, wherein if the difference value between the maximum tension reading and the minimum tension reading is smaller than or equal to a maximum preset stress difference, the first control unit determines that the first section of reinforcement cage is stable; and if the difference value between the maximum tension reading and the minimum tension reading is larger than the maximum preset stress difference, the first control unit judges that the first section of reinforcement cage is inclined.
Further, when the first control unit determines that the first section of reinforcement cage is inclined, the first control unit obtains a tension sensor A displaying the maximum tension reading Fmax and a tension sensor B displaying the minimum tension reading Fmin, if the tension sensor A and the tension sensor B are both connected with the first steel shoulder pole, the first control unit controls the main hook adjusting angle of the main crane to Fmax-Fmin less than or equal to delta F0, and if the tension sensor A and the tension sensor B are both connected with the second steel shoulder pole, the second control unit controls the main hook adjusting angle of the auxiliary crane to Fmax-Fmin less than or equal to delta F0; if the tension sensor A and the tension sensor B are respectively arranged below the first steel carrying pole and below the second steel carrying pole, the first control unit and the second control unit respectively control the main hook of the main crane and the main hook of the auxiliary crane to adjust the angles together so that Fmax-Fmin is less than or equal to delta F0, wherein the angle adjustment directions of the main hook of the main crane and the main hook of the auxiliary crane are opposite.
Further, when the first section of reinforcement cage is confirmed to be stable, free of welding and deformation, a second control unit arranged in the auxiliary crane obtains the maximum lifting height of the auxiliary crane to the first section of reinforcement cage according to the comparison result of the height of the first section of reinforcement cage and the height threshold value of the sectional reinforcement cage,
the maximum lifting height of the auxiliary crane to the first section of reinforcement cage is determined or determined by the ratio of the height of the first section of reinforcement cage to the height threshold value of the sectional reinforcement cage, or is equal to the minimum ground clearance height of the tail part of the reinforcement cage.
Further, in the step S3, when the main crane lifts the first section of reinforcement cage to a second preset height, the auxiliary crane stops moving in the main crane direction, the first control unit obtains a rotation angular velocity of the main crane according to a real-time horizontal distance between the main crane and the auxiliary crane, wherein,
the rotation angular speed of the main crane is determined by the ratio of the real-time horizontal distance between the main crane and the auxiliary crane to the minimum preset distance between the main crane and the auxiliary crane, or the ratio of the difference value of the real-time horizontal distance between the main crane and the auxiliary crane to the real-time horizontal distance between the main crane and the auxiliary crane.
Further, the second control unit acquires the horizontal direction angular velocity of the auxiliary crane in real time according to the inclination angle of the first section of reinforcement cage, wherein the horizontal direction angular velocity of the auxiliary crane is determined by the rotary angular velocity of the main crane;
when the auxiliary crane rotates along the rotation direction of the main crane to the point that the first section of reinforcement cage is perpendicular to the ground, the main crane stops rotating automatically, and the auxiliary crane stops rotating clockwise and unloads hooks.
Further, when the auxiliary crane stops rotating clockwise and the hook is detached, the first control unit calculates the tail part distance from the ground of the first section of reinforcement cage, in the step S4, the first control unit obtains the moving speed of the main crane to move the first section of reinforcement cage to the slot hole and the axial line allowable deviation of the first section of reinforcement cage according to the weight of the first section of reinforcement cage and the tail part distance from the ground of the first section of reinforcement cage,
the moving speed of the first section of reinforcement cage to the slot opening and the axial line allowable deviation of the first section of reinforcement cage are determined by the product of the ratio of the weight of the first section of reinforcement cage to the weight threshold value of the sectional reinforcement cage and the ratio of the initial horizontal distance between the main crane and the auxiliary crane to the minimum preset distance between the cranes.
Further, when the main crane moves the first section of reinforcement cage to the slot opening, the axis of the bottom of the first section of reinforcement cage is aligned with the central axis of the slot opening within the allowable deviation of the axis of the first section of reinforcement cage, the first control unit obtains the preset lowering speed of the main crane to the first section of reinforcement cage according to the allowable deviation of the axis of the first section of reinforcement cage,
the preset lowering speed of the main crane to the first section of reinforcement cage is determined by the ratio of the difference value between the width of the slotted hole opening and the width of the first section of reinforcement cage to the allowable deviation of the axis of the first section of reinforcement cage.
Further, when the main crane descends the first section of reinforcement cage with the power corresponding to the preset descending speed, the first control unit judges whether to stop the descending of the first section of reinforcement cage according to the change condition of the instantaneous speed of the first section of reinforcement cage in the descending process before the first section of reinforcement cage reaches the first preset descending position,
if the instantaneous speed of the first section of reinforcement cage in the lowering process is kept unchanged, the first control unit judges that the first section of reinforcement cage is continuously lowered until the first section of reinforcement cage is lowered to a first preset lowering position;
If the difference between the instant speed of a certain moment t and the preset lowering speed of the first section of reinforcement cage in the lowering process is greater than 0.1 time of the preset lowering speed, the first control unit judges that the lowering of the first section of reinforcement cage is stopped, and an alarm arranged in a control room of the main crane sends out a clamping groove prompt.
Further, when the first control unit determines to stop the lowering of the first section of reinforcement cage, the first control unit obtains the lifting height of the main crane to the first section of reinforcement cage according to the difference value between the instant speed at the moment t and the preset lowering speed,
the lifting height of the main crane to the first section of reinforcement cage is determined or determined by the ratio of the difference value between the instant speed of the moment t and the preset lowering speed to the preset speed difference value, or is equal to the sum of the height of the first section of reinforcement cage and the minimum ground clearance height of the tail part of the reinforcement cage.
Compared with the prior art, the method has the beneficial effects that the problem that the inside of the steel bar is stressed and deformed due to overlarge internal stress of the steel bar can be solved by carrying out sectional hoisting on the steel bar cage, the problem that the hoisting capacity and the hoisting height of the crane are not in accordance with the requirements can be avoided, the auxiliary crane obtains the hoisting height of the auxiliary crane to the steel bar cage according to the preset hoisting height of the main crane to the steel bar cage and the height of the steel bar cage, the situation that the danger is too high due to the fact that the steel bar cage is too far away from the ground can be avoided, the situation that the steel bar cage is too close to the ground and easily scrapes building materials stacked on the ground in the moving process can be avoided, the initial hoisting speed of the main crane is obtained according to the horizontal distance between the main crane and the auxiliary crane and the weight of the steel bar cage, the internal stress of the steel bar cage is uniformly and slowly changed in the hoisting process, the deformation of the steel bar cage is reduced, the operation difficulty of the auxiliary crane is increased in the hoisting process is reduced, the angular speed of the auxiliary crane is obtained according to the horizontal distance between the main crane and the hoisting, the horizontal angular speed of the auxiliary crane is always controlled, the situation that the angle of the hoisting cage is always controlled to the rotating speed of the steel bar cage is controlled, and the horizontal angle of the auxiliary crane is always can be controlled, and the horizontal angle of the hoisting cage is always is stable in the hoisting is controlled, and the angle of the cage is can is controlled.
In particular, according to the invention, whether the steel reinforcement cage is inclined when the steel reinforcement cage is horizontally hung to the first preset height is judged according to the difference value of the maximum tension and the minimum tension of the steel reinforcement ropes obtained by the tension sensors, when the difference value of the maximum tension and the minimum tension is large, the larger tension born by the steel reinforcement ropes connected with a certain hanging point can be judged, further, the uneven tension born by the steel reinforcement ropes is judged, the center of gravity of the steel reinforcement cage is deviated, the average tension of the steel reinforcement cage on the steel strands is realized by adjusting the angles of the main hooks of the main crane and the auxiliary crane, and whether the steel reinforcement cage is subjected to unwelding and deformation can be accurately judged when the steel reinforcement cage is at the first preset height.
In particular, the invention obtains the maximum lifting height of the auxiliary crane to the reinforcement cage according to the comparison result of the height threshold value of the sectional reinforcement cage and the height of the first section of reinforcement cage, when the height of the first section of reinforcement cage is smaller, the volume weight of the reinforcement cage can be judged to be smaller, the smaller lifting height is selected to have smaller influence on the stress distribution of the reinforcement cage, the reinforcement cage can be quickly vertical to the ground when the auxiliary crane rotates clockwise, and the position of the reinforcement cage can be controlled more easily; when the first section of steel reinforcement cage is large in height, the steel reinforcement cage is large in volume and weight, the large hoisting height is selected, the situation that the middle of the steel reinforcement cage is large in deformation due to the fact that longitudinal stress distribution of the steel reinforcement cage is too concentrated can be avoided, and the steel reinforcement cage position is difficult to control due to the fact that the weight of the steel reinforcement cage is too large, enough ground clearance height is reserved, and the auxiliary crane can find the position of the steel reinforcement cage perpendicular to the ground more easily.
In particular, the invention adjusts the initial lifting speed of the main crane according to the difference between the second preset height and the maximum lifting height of the auxiliary crane to the first section of reinforcement cage, when the difference is larger, the smaller lifting speed is selected to ensure that the tension born by the auxiliary crane is gradually changed, thereby ensuring that the reinforcement cannot be greatly deformed due to larger change of external force, the lifting point position is used as a weak position, and the lifting speed is too fast to easily damage the lifting point position on the upper part of the reinforcement cage, so that the safety is influenced.
In particular, the initial hoisting speed of the main crane is obtained according to the initial horizontal distance between the main crane and the auxiliary crane and the weight of the steel reinforcement cage, if the horizontal distance between the main crane and the auxiliary crane is smaller, when the same preset height is reached, the inclination angle of the steel reinforcement cage is larger, the position of the auxiliary hoisting point is relatively smaller than the tension of the steel reinforcement cage, the larger initial hoisting speed is selected to enable the steel reinforcement cage to quickly reach the preset position, the hoisting point cannot be damaged due to the change of the tension, if the initial horizontal distance between the main crane and the auxiliary crane is larger, when the weight of the steel reinforcement is larger, the steel reinforcement cage is easily deformed due to the gravity of the steel reinforcement cage and the tension of the hoisting point, so the gravity of the steel reinforcement cage is selected as one of factors for adjusting the initial hoisting speed.
In particular, the invention obtains the rotary angular velocity according to the real-time horizontal distance between the main crane and the auxiliary crane, when the real-time horizontal distance between the main crane and the auxiliary crane is smaller, the smaller rotary angular velocity is selected to reduce the operation difficulty of the auxiliary crane, and when the real-time horizontal distance between the main crane and the auxiliary crane is larger, the auxiliary crane is easier to control the reinforcement cage, and the larger rotary angular velocity is selected to enable the reinforcement cage to quickly reach the preset position.
In particular, the horizontal angular velocity of the auxiliary crane is obtained through the inclination angle of the reinforcement cage and the rotation angular velocity of the main crane, so that the combined force of the reinforcement cage can be kept in a stable range, the situation that the internal stress of the reinforcement cage is unevenly distributed and deformed greatly is avoided, when the inclination angle of the reinforcement cage is large, the reinforcement cage can be described to be close to being perpendicular to the ground, the swing can be reduced when the reinforcement cage reaches a preset position through controlling the horizontal angular velocity, and the control of the position of the reinforcement cage is easy.
In particular, the moving speed of moving the first section of reinforcement cage to the slot opening and the axial allowable deviation of the first section of reinforcement cage are obtained according to the weight of the first section of reinforcement cage and the height of the tail of the first section of reinforcement cage from the ground, the larger the height of the tail of the reinforcement cage from the ground is, the more difficult the axial positioning is, the larger the axial deviation is selected, the operation difficulty can be reduced, the larger the weight of the reinforcement cage is, the larger the size is, the possibility of clamping the slot when the reinforcement cage is lowered is higher, and the smaller axial deviation is selected, so that the clamping of the slot when the reinforcement cage is lowered can be avoided.
Drawings
FIG. 1 is a flow chart of a construction method for hoisting a reinforcement cage of an ultra-deep underground continuous wall in an embodiment of the invention;
FIG. 2 is a schematic view of a main crane structure according to an embodiment of the invention;
FIG. 3 is a schematic view of a steel shoulder pole according to an embodiment of the invention;
fig. 4 is a flowchart of a method for manufacturing an ultra-deep wall-connected reinforcement cage according to an embodiment of the invention.
Detailed Description
In order that the objects and advantages of the invention will become more apparent, the invention will be further described with reference to the following examples; it should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that, in the description of the present invention, terms such as "upper," "lower," "left," "right," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.
Referring to fig. 1, a flow chart of a construction method for hoisting an ultra-deep wall-connected reinforcement cage according to an embodiment of the invention includes:
step S1, the main crane and the auxiliary crane reach the hoisting position, and after the installation condition and the stressed gravity center of the lifting appliance are checked, a first section of reinforcement cage is hoisted in a flat mode;
step S2, the main crane and the auxiliary crane horizontally lift the first section of reinforcement cage to a first preset height, and after the first section of reinforcement cage is confirmed to be stable, free of welding and deformation, the main crane lifts the hook, and the auxiliary crane moves and lifts the hook in a matched manner according to the ground clearance of the tail part of the first section of reinforcement cage;
step S3, when the main crane lifts the first section of reinforcement cage to a second preset height, the main crane rotates to one side, and the auxiliary crane rotates forward along the rotation direction of the main crane so that the first section of reinforcement cage is perpendicular to the ground, and then the auxiliary crane unloads the hooks;
Step S4, the main crane moves the first section of reinforcement cage to the slot opening to be aligned accurately and put into the slot, the first section of reinforcement cage is horizontally positioned on the guide wall through square steel, when the main crane lowers the first section of reinforcement cage with power corresponding to the preset lowering speed, before the first section of reinforcement cage reaches the first preset lowering position, whether to stop lowering the first section of reinforcement cage is judged according to the change condition of the instantaneous speed of the first section of reinforcement cage in the lowering process, and the lifting height of the main crane to the first section of reinforcement cage is obtained according to the difference value between the instantaneous speed of the first section of reinforcement cage when the first section of reinforcement cage is judged to stop lowering and the preset lowering speed;
step S5, repeating the steps S1 to S3 to hoist a second section of reinforcement cage, enabling the second section of reinforcement cage to be aligned with the first section of reinforcement cage in a natural vertical state, slowly lowering the second section of reinforcement cage to enable all groups of longitudinal main reinforcements to straighten in a straight direction, and enabling all groups of longitudinal main reinforcements at the butt joint positions of the first section of reinforcement cage and the second section of reinforcement cage to be connected through straight thread sleeves to form a whole reinforcement cage;
and S6, when the whole steel reinforcement cage is placed into the groove by the main crane, the whole steel reinforcement cage is placed down to the position of a third row of placing points, the steel reinforcement cage is lifted up after the shackles at the third row of hanging points are removed and connected with the steel wire ropes reserved at the second row of hanging points by the square steel, the steel reinforcement cage is lifted up after the shackles at the second row of hanging points are removed and connected with the steel wire ropes reserved at the first row of hanging points by the square steel positioned on the guide wall, the steel reinforcement cage is continuously placed down to the first row of placing points after the square steel is removed, the shackles at the first row of hanging points are removed by the square steel positioned on the guide wall, and until the shackles of four steel wire ropes are installed on 4 lifting rings at the top of the whole steel reinforcement cage by the main crane, and the square steel reinforcement cage is positioned on the guide wall when the whole steel reinforcement cage is continuously lowered to a designed elevation.
Referring to fig. 2, a schematic diagram of a main crane structure according to an embodiment of the present invention is shown, the main crane includes a track 1 for moving, a revolving mechanism 2 disposed above the track for self-rotating, a main arm 3 connected to the revolving mechanism through a main arm pulling plate 7, an extension arm 4 connected to the main arm, the extension arm is respectively connected to a secondary hook 5 and a primary hook 6, a displacement sensor 11 for acquiring the position of the primary hook in real time is disposed above the primary hook 6, a fixed pulley block 10 is connected to the tail of the revolving mechanism, a movable pulley block 8 is connected above the fixed pulley block, the movable pulley block 8 is connected to the revolving mechanism through a mast 9, an ultrasonic probe 12 for acquiring the inclination angle of the reinforcement cage is disposed above the head of the revolving mechanism, the ultrasonic probe is used for acquiring the inclination angle of the reinforcement cage, the main crane further includes a first control unit (not shown in the figure) for acquiring the height of the primary hook transmitted by the displacement sensor, acquiring the height of the cage according to the relative position of the primary hook and the cage, the auxiliary crane height of the cage is transmitted to a second control unit for transmitting the height of the reinforcement cage to the second control unit for acquiring the inclination angle of the reinforcement cage to a second control unit, and the second control unit for transmitting the operation parameters to the second control unit.
Specifically, the height of the reinforcement cage in this embodiment represents the vertical distance of the top of the reinforcement cage from the ground.
The auxiliary crane is identical to the main crane in structure, and further comprises a second control unit, wherein a first preset height and a second preset height are arranged in the first control unit and the second control unit, and the second control unit is used for transmitting the maximum lifting height of the auxiliary crane to the reinforcement cage to the first control unit.
When the main crane and the auxiliary crane hoist the reinforcement cage, the second control unit obtains the maximum hoisting height of the auxiliary crane to the reinforcement cage according to the height of the first section of reinforcement cage and the second preset height, and the first control unit adjusts the initial hoisting speed of the main crane according to the difference value between the second preset height and the maximum hoisting height of the auxiliary crane to the reinforcement cage, wherein the first control unit obtains the initial hoisting speed of the main crane according to the initial horizontal distance between the main crane and the auxiliary crane and the weight of the reinforcement cage; when the auxiliary crane unloads hooks, the first control unit obtains the moving speed of the reinforcement cage to a slot hole and the axis allowed deviation of the first section reinforcement cage according to the weight of the reinforcement cage and the tail part ground clearance of the reinforcement cage, obtains the preset lowering speed of the first section reinforcement cage according to the axis allowed deviation of the first section reinforcement cage, judges whether to stop lowering the first section reinforcement cage according to the change condition of the instantaneous speed of the first section reinforcement cage in the lowering process before the first section reinforcement cage reaches the first preset lowering position, and obtains the lifting height of the first section reinforcement cage according to the difference value of the instantaneous speed at the moment of the instantaneous speed and the preset lowering speed when the main crane judges to stop lowering the first section reinforcement cage.
The invention can solve the problem that the internal stress of the steel bar is too large to deform the steel bar under pressure, and can avoid the problem that the lifting capacity and the lifting height of a crane are not in accordance with the requirements.
Referring to fig. 3, a structural schematic diagram of a steel shoulder pole according to an embodiment of the present invention is shown, where the steel shoulder pole includes a square steel 131, a plurality of hooks 132 connected to the square steel, a plurality of steel strands 133 connected to the hooks, and tension sensors 136 for obtaining tension of the steel strands are respectively disposed in the middle of the steel strands; a plurality of adjustable telescopic rods 134 are also arranged below the square steel, and each telescopic rod is connected with a plurality of supporting rods 137 through a plurality of motorized rollers 135 respectively.
In the step S2, the first control unit obtains the tension readings Fr, r=1, 2 …, R of each tension sensor provided in the first steel shoulder pole connected with the main hook of the main crane, the second control unit obtains the tension readings Fw of each tension sensor provided in the second steel shoulder pole connected with the main hook of the auxiliary crane, and transmits the tension readings Fw to the first control unit, w=1, 2 …, W, R is the number of tension sensors provided under the first steel shoulder pole, W is the number of tension sensors provided under the second steel shoulder pole, the first control unit determines whether the first section of reinforcement cage is stable according to the difference value between the maximum tension reading Fmax and the minimum tension reading Fmin among the tension readings,
If Fmax-Fmin is less than or equal to delta F0, the first control unit judges that the first section of reinforcement cage is stable;
if Fmax-Fmin > [ delta ] F0, the first control unit judges that the first section of reinforcement cage is inclined, and the first control unit and the second control unit respectively adjust the main crane and the auxiliary crane;
wherein Δf0 is the maximum preset stress difference.
Specifically, Δf0=80n is set in this embodiment.
Specifically, whether the steel reinforcement cage is inclined or not is judged according to the difference value between the maximum tension and the minimum tension of the steel reinforcement ropes obtained by the tension sensors, when the difference value between the maximum tension and the minimum tension is large, the fact that the tension borne by the steel reinforcement ropes connected with a certain hanging point is large can be judged, further, the fact that the tension borne by the steel reinforcement ropes is uneven is judged, the center of gravity of the steel reinforcement cage is deviated, the tension of the steel reinforcement cage on each steel strand is averaged through the angle adjustment of the main hooks of the main crane and the auxiliary crane, and whether the steel reinforcement cage is subjected to unwelding and deformation can be accurately judged when the first preset height is achieved.
When the first control unit judges that the first section of reinforcement cage is inclined, the first control unit obtains a tension sensor A displaying the maximum tension reading and a tension sensor B displaying the minimum tension reading, if the tension sensor A and the tension sensor B are connected with the first steel shoulder pole, the first control unit controls the main hook adjusting angle of the main crane to be Fmax-Fmin less than or equal to delta F0, and if the tension sensor A and the tension sensor B are connected with the second steel shoulder pole, the second control unit controls the main hook adjusting angle of the auxiliary crane to be Fmax-Fmin less than or equal to delta F0; if the tension sensor A and the tension sensor B are respectively arranged below the first steel carrying pole and below the second steel carrying pole, the first control unit and the second control unit respectively control the main hook of the main crane and the main hook of the auxiliary crane to adjust the angles together so that Fmax-Fmin is less than or equal to delta F0, wherein the angle adjustment directions of the main hook of the main crane and the main hook of the auxiliary crane are opposite.
In the step S2, when it is confirmed that the first section of reinforcement cage is stable, free of welding and deformation, the second control unit obtains a maximum lifting height of the auxiliary crane to the first section of reinforcement cage according to the height of the first section of reinforcement cage and a second preset height, wherein,
if the height of the first section of steel reinforcement cage is smaller than the threshold value of the height of the sectional steel reinforcement cage, the second control unit obtains that the maximum lifting height of the auxiliary crane to the first section of steel reinforcement cage is the first maximum lifting height;
if the height of the first section of steel reinforcement cage is larger than or equal to the threshold value of the height of the sectional steel reinforcement cage, the second control unit obtains that the maximum lifting height of the auxiliary crane to the first section of steel reinforcement cage is the second maximum lifting height;
wherein, a first maximum lifting height h1=min { H2-l× (1+sin (Δθ - Δθ×l0/L),. DELTA.h0 }, a second maximum lifting height h2=max { H2-l× (1+sin (Δθ×l/L0)),. DELTA.h0 }, where L0 is a segmented reinforcement cage height threshold, L is the height of the first segmented reinforcement cage, H2 is a second preset height, Δθ is an assigned unit angle, and Δh0 is a minimum ground clearance height of the reinforcement cage tail.
Specifically, in this embodiment, the second preset height h2=52.9m, the height of the first section of reinforcement cage is 48m, and the assignment unit angle Δθ=5° is set in this embodiment, and the minimum height Δh0=0.5m of the tail of the reinforcement cage is set.
Specifically, the method acquires the maximum lifting height of the auxiliary crane to the reinforcement cage according to the comparison result of the height threshold value of the sectional reinforcement cage and the height of the first section of reinforcement cage, when the height of the first section of reinforcement cage is smaller, the volume weight of the reinforcement cage can be judged to be smaller, the smaller lifting height is selected to have smaller influence on the stress distribution of the reinforcement cage, the reinforcement cage can be quickly perpendicular to the ground when the auxiliary crane rotates clockwise, and the position of the reinforcement cage can be controlled more easily; when the first section of steel reinforcement cage is large in height, the steel reinforcement cage is large in volume and weight, the large hoisting height is selected, the situation that the middle of the steel reinforcement cage is large in deformation due to the fact that longitudinal stress distribution of the steel reinforcement cage is too concentrated can be avoided, and the steel reinforcement cage position is difficult to control due to the fact that the weight of the steel reinforcement cage is too large, enough ground clearance height is reserved, and the auxiliary crane can find the position of the steel reinforcement cage perpendicular to the ground more easily.
When the main crane and the auxiliary crane simultaneously hoist the first section of steel reinforcement cage to the maximum hoisting height of the auxiliary crane to the first section of steel reinforcement cage, the auxiliary crane stops hoisting the first section of steel reinforcement cage and moves towards the main crane, the main crane continues hoisting the first section of steel reinforcement cage, the first control unit adjusts the initial hoisting speed of the main crane according to the difference value between the second preset height and the maximum hoisting height of the auxiliary crane to the first section of steel reinforcement cage,
If the difference between the second preset height and the maximum lifting height of the auxiliary crane to the first section of steel reinforcement cage is smaller than the product of the height of the first section of steel reinforcement cage and sin75 degrees, the first control unit adjusts the initial lifting speed to be the first lifting speed;
if the difference between the second preset height and the maximum lifting height of the auxiliary crane to the first section of steel reinforcement cage is greater than or equal to the product of the height of the first section of steel reinforcement cage and sin75 degrees, the first control unit adjusts the initial lifting speed to the second lifting speed;
wherein a first hoisting speed v1=v0× (H2-hi)/L is set, a second hoisting speed v2=v0×ln (H2-hi)/lnL is set, and a speed at which the sub-crane moves in the main hoisting direction is setWhere i=1, 2, v0 is the initial hoisting speed of the main crane, and u=1, 2.
Specifically, the method adjusts the initial lifting speed of the main crane according to the difference between the second preset height and the maximum lifting height of the auxiliary crane to the first section of reinforcement cage, when the difference is large, the smaller lifting speed is selected to ensure that the tension born by the auxiliary crane is gradually changed, so that the reinforcement is not greatly deformed due to large change of external force, the lifting point position is used as a weak position, and the lifting speed is too high to easily damage the lifting point position on the upper part of the reinforcement cage, thereby influencing the safety.
The main crane is internally provided with a standard lifting speed, the first control unit obtains an initial lifting speed v0 of the main crane according to an initial horizontal distance between the main crane and the auxiliary crane and the weight of the first section of reinforcement cage,
if the initial horizontal distance between the auxiliary crane and the main crane is smaller than or equal to the minimum preset distance between the cranes, the first control unit obtains the initial lifting speed of the main crane as a first initial lifting speed;
if the initial horizontal distance between the auxiliary crane and the main crane is larger than the minimum preset distance between the cranes, the first control unit obtains the initial lifting speed of the main crane as a second initial lifting speed;
wherein a first initial lifting speed v01=v is set A X (s/s 0) × (G0/G), setting a second initial lifting speed v02=v A X (s 0/s) x (G0/G), wherein s is the initial horizontal distance between the main crane and the auxiliary crane, s0 is the minimum preset distance between the cranes, G0 is the weight threshold of the segmented reinforcement cage, G is the weight of the first segment reinforcement cage, v A Is the standard lifting speed.
Specifically, in this embodiment, the minimum preset distance s0=45m between cranes is set, the weight threshold value g0=24t of the segmented reinforcement cage is set, and the standard hoisting speed v is set A =3.5m/min。
Specifically, the initial hoisting speed of the main crane is obtained according to the initial horizontal distance between the main crane and the auxiliary crane and the weight of the steel reinforcement cage, if the horizontal distance between the main crane and the auxiliary crane is smaller, when the same preset height is reached, the inclination angle of the steel reinforcement cage is larger, the position of the auxiliary hoisting point is relatively smaller than the tension of the steel reinforcement cage, the larger initial hoisting speed is selected to enable the steel reinforcement cage to quickly reach the preset position, the hoisting point cannot be damaged due to the change of the tension, if the initial horizontal distance between the main crane and the auxiliary crane is larger, when the weight of the steel reinforcement is larger, the steel reinforcement cage is easily deformed due to the gravity of the steel reinforcement cage and the tension of the hoisting point, and therefore the gravity of the steel reinforcement cage is selected as one of factors for adjusting the initial hoisting speed.
In the step S3, when the main crane lifts the first section of reinforcement cage to a second preset height, the auxiliary crane stops moving in the main crane direction, the first control unit obtains a rotation angular velocity according to a real-time horizontal distance between the main crane and the auxiliary crane, wherein,
if the real-time horizontal distance between the main crane and the auxiliary crane is smaller than the minimum preset distance between the cranes, the first control unit obtains the rotation angular speed as a first angular speed;
if the real-time horizontal distance between the main crane and the auxiliary crane is greater than or equal to the minimum preset distance between the cranes, the first control unit acquires the rotation angular velocity as a second angular velocity;
when the main crane rotates automatically, the auxiliary crane rotates to a preset position along the direction of the self-rotation of the main crane so that the first section of reinforcement cage is perpendicular to the ground;
wherein the first angular velocity ω1=ω0× (1-e -s0/s’ ) The second angular velocity ω2=ω0× (1+ (s '-s 0)/s') 0.5 Wherein ω0 is the standard rotation angular velocity of the main crane, e is the base number of natural logarithm, and s' is the real-time horizontal distance between the main crane and the auxiliary crane.
Specifically, the present embodiment sets ω0=1.8r/min.
Specifically, the method and the device acquire the rotating angular velocity according to the real-time horizontal distance between the main crane and the auxiliary crane, when the real-time horizontal distance between the main crane and the auxiliary crane is smaller, the smaller rotating angular velocity is selected to reduce the operation difficulty of the auxiliary crane, and when the real-time horizontal distance between the main crane and the auxiliary crane is larger, the auxiliary crane is easier to control the reinforcement cage, and the larger rotating angular velocity is selected to enable the reinforcement cage to quickly reach the preset position.
The second control unit acquires the horizontal angular velocity of the auxiliary crane in real time according to the rotation angular velocity of the main crane and the inclination angle of the first section of reinforcement cage, wherein,
if the inclination angle of the first section of reinforcement cage is smaller than or equal to 75 degrees, the second control unit obtains the horizontal angular velocity as a first angular velocity;
if the inclination angle of the first section of reinforcement cage is larger than 75 degrees, the second control unit obtains the horizontal angular velocity as a second angular velocity;
when the auxiliary crane rotates along the rotation direction of the main crane until the first section of reinforcement cage is perpendicular to the ground, the main crane stops rotating automatically, and the auxiliary crane stops rotating clockwise and unloads hooks;
wherein, the first partial angular velocity ω1 '=ωq+ωq× (75 ° - β)/75 °, and the second partial angular velocity ω2' =ωq+ωq× (90 ° - β)/β are set, where q=1, 2, β is the inclination angle of the first section of reinforcement cage.
Specifically, in this embodiment, the inclination angle of the first section of steel reinforcement cage represents the included angle between the first section of steel reinforcement cage and the ground, and when the auxiliary crane moves along the rotation direction of the main crane in a forward and backward way, the included angle between the first section of steel reinforcement cage and the ground changes, and the angular velocity component of the auxiliary crane in the horizontal direction, namely the horizontal direction angular velocity of the auxiliary crane, can be obtained by decomposing the movement velocity of the auxiliary crane, and the horizontal direction represents the horizontal plane parallel to the ground.
Specifically, the horizontal angular velocity of the auxiliary crane is obtained through the inclination angle of the reinforcement cage and the rotation angular velocity of the main crane, so that the combined force of the reinforcement cage can be kept in a stable range, the situation that the internal stress of the reinforcement cage is unevenly distributed is avoided, when the inclination angle of the reinforcement cage is large, the reinforcement cage can be described to be close to being perpendicular to the ground, the swing can be reduced when the reinforcement cage reaches a preset position through controlling the horizontal angular velocity, and the control of the position of the reinforcement cage is easy.
When the auxiliary crane stops rotating clockwise and finishes unhooking, the first control unit calculates the tail part ground clearance of the first section of reinforcement cage, in the step S4, the first control unit obtains the moving speed of moving the first section of reinforcement cage to the slot hole and the axial line allowable deviation of the first section of reinforcement cage according to the weight of the first section of reinforcement cage and the tail part ground clearance of the first section of reinforcement cage,
if (G/G0) x (delta h/deltah 0) is more than or equal to 1.2, the first control unit obtains the speed of moving the first section of reinforcement cage to the slot orifice as a first moving speed, and obtains the axis allowable deviation of the first section of reinforcement cage as a first allowable deviation;
If (G/G0) x (delta h/deltah 0) is less than 1.2, the first control unit obtains the speed of moving the first section of reinforcement cage to the slot orifice as a second moving speed, and obtains the axial line allowable deviation of the first section of reinforcement cage as a second allowable deviation;
wherein, a first moving speed v1=v0-v0×1.2/((G/G0) × (Δh/Δh0)) is set, a second moving speed v2=v0, v0 is a standard moving speed of the main crane, a first allowable deviation Δd1=max {0.4× (D-D) ×1.2/((G/G0) × (Δh/Δh0)), 0.25× (D-D) }, a second allowable deviation Δd2=0.3× (D-D), D is a slot opening width, D is a width of the first section of reinforcement cage, and Δh is a tail ground clearance height of the first section of reinforcement cage.
Specifically, the present embodiment sets v0=0.4 m/s, and the allowable deviation of the axis of the first section of the reinforcement cage in the present embodiment indicates the offset distance between the central axis of the bottom of the reinforcement cage parallel to the long side and the central axis of the slot aperture parallel to the long side.
Specifically, the moving speed of moving the first section of reinforcement cage to the slot opening and the axial allowable deviation of the first section of reinforcement cage are obtained according to the weight of the first section of reinforcement cage and the height of the tail of the first section of reinforcement cage from the ground, the larger the height of the tail of the reinforcement cage from the ground is, the more difficult the axial positioning is, the larger the axial deviation is selected, the operation difficulty can be reduced, the larger the weight of the reinforcement cage is, the larger the size is, the possibility of clamping the slot when the reinforcement cage is lowered is higher, and the smaller axial deviation is selected, so that the clamping of the slot when the reinforcement cage is lowered can be avoided.
When the main crane moves the first section of reinforcement cage to the slot opening, the axis of the bottom of the first section of reinforcement cage is aligned with the central axis of the slot opening within the allowable deviation of the axis of the first section of reinforcement cage, the first control unit obtains the preset lowering speed of the first section of reinforcement cage according to the allowable deviation of the axis of the first section of reinforcement cage,
if the allowable deviation of the axis of the first section of steel reinforcement cage is less than or equal to 0.25 time of the width of the slot opening and the first section of steel reinforcement cage, the first control unit obtains the lowering speed of the first section of steel reinforcement cage as a first lowering speed;
if the allowable deviation of the axis of the first section of reinforcement cage is more than 0.25 times of the width of the slot opening and the first section of reinforcement cage, the first control unit obtains the lowering speed of the first section of reinforcement cage as a second lowering speed;
wherein, the first drop velocity va=vi×Δdm/(0.25× (D-D)), and the second drop velocity vb=vi× (1+ (Δdm- (0.25× (D-D))/(Δdm)), where m=1, 2.
When the main crane descends the first section of steel reinforcement cage with the power corresponding to the preset descending speed, the first control unit judges whether to stop the descending of the first section of steel reinforcement cage according to the change condition of the instantaneous speed of the first section of steel reinforcement cage in the descending process before the first section of steel reinforcement cage reaches the first preset descending position,
If the instantaneous speed of the first section of reinforcement cage in the lowering process is kept unchanged, the first control unit judges that the first section of reinforcement cage is continuously lowered until the first section of reinforcement cage is lowered to a first preset lowering position;
if the difference between the instant speed of the first section of reinforcement cage at a certain moment in the descending process and the preset descending speed is greater than 0.1 time of the preset descending speed, the first control unit judges that the first section of reinforcement cage is stopped from being descended, and an alarm arranged in a control room of the main crane sends out a clamping groove prompt.
When the first control unit judges that the first section of reinforcement cage stops being lowered, the first control unit obtains the lifting height of the first section of reinforcement cage according to the difference value between the instant speed at the moment and the preset lowering speed, wherein,
if the difference value between the instant speed at the moment and the preset lowering speed is larger than the preset speed difference value, the first control unit obtains that the lifting height of the first section of reinforcement cage is a first adjustment height;
if the difference value between the instant speed at the moment and the preset lowering speed is smaller than or equal to the preset speed difference value, the first control unit obtains that the lifting height of the first section of reinforcement cage is a second adjusting height;
When the main crane lifts the first section of reinforcement cage to the first adjusting height again, the main crane lowers the first section of reinforcement cage again; when the main crane lifts the first section of reinforcement cage to the second adjustment height again, the main crane lowers the first section of reinforcement cage again after acquiring the prompt of the completion of the checking of the slotted hole;
wherein, the first adjustment height r1=r0× Δv0/- Δv0 is set, and the second adjustment height r2=l+Δh0 is set, where R0 is a single standard lifting distance, and Δv0 is a preset speed difference.
Specifically, in the present embodiment, r0=0.5m is set, and the preset speed difference Δv0 is equal to a preset drop speed of 0.5 times.
Referring to fig. 4, a flowchart of a method for manufacturing an ultra-deep wall-connected reinforcement cage according to an embodiment of the invention includes:
step S01: laying a lower layer horizontal rib, and welding and fixing;
step S02: welding a truss and a standing rib;
step S03: paving longitudinal ribs and welding firmly;
step S04: welding a bottom layer protection cushion block;
step S05: erecting a truss and a erection rib, and welding and fixing;
step S06: welding lifting point reinforcing ribs, upper layer longitudinal steel bars, upper layer transverse steel bars and upper layer lifting point ribs;
step S07: and welding additional ribs and protecting cushion blocks.
Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will be within the scope of the present invention.
The foregoing description is only of the preferred embodiments of the invention and is not intended to limit the invention; various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (9)

1. The construction method for hoisting the ultra-deep underground continuous wall reinforcement cage is characterized by comprising the following steps of:
step S1, the main crane and the auxiliary crane reach the hoisting position, and after the installation condition and the stressed gravity center of the lifting appliance are checked, a first section of reinforcement cage is hoisted in a flat mode;
step S2, the main crane and the auxiliary crane horizontally lift the first section of reinforcement cage to a first preset height, and after the first section of reinforcement cage is confirmed to be stable, free of welding and deformation, the main crane lifts the hook, and the auxiliary crane moves and lifts the hook in a matched manner according to the ground clearance of the tail part of the first section of reinforcement cage;
Step S3, when the main crane lifts the first section of reinforcement cage to a second preset height, the main crane rotates to one side, and the auxiliary crane rotates forward along the rotation direction of the main crane so that the first section of reinforcement cage is perpendicular to the ground, and then the auxiliary crane unloads the hooks;
step S4, the main crane moves the first section of reinforcement cage to the slot opening to be aligned accurately and put into the slot, the first section of reinforcement cage is horizontally positioned on the guide wall through square steel, when the main crane lowers the first section of reinforcement cage with power corresponding to the preset lowering speed, before the first section of reinforcement cage reaches the first preset lowering position, whether to stop lowering the first section of reinforcement cage is judged according to the change condition of the instantaneous speed of the first section of reinforcement cage in the lowering process, and the lifting height of the main crane to the first section of reinforcement cage is obtained according to the difference value between the instantaneous speed of the first section of reinforcement cage when the first section of reinforcement cage is judged to stop lowering and the preset lowering speed;
step S5, repeating the steps S1 to S3 to hoist a second section of reinforcement cage, enabling the second section of reinforcement cage to be aligned with the first section of reinforcement cage in a natural vertical state, slowly lowering the second section of reinforcement cage to enable all groups of longitudinal main reinforcements to straighten in a straight direction, and enabling all groups of longitudinal main reinforcements at the butt joint positions of the first section of reinforcement cage and the second section of reinforcement cage to be connected through straight thread sleeves to form a whole reinforcement cage;
S6, when the whole steel reinforcement cage is placed into the groove by the main crane, the whole steel reinforcement cage is placed down to the position of a third row of placing points, the steel reinforcement cage is lifted up after the shackles at the third row of hanging points are removed and connected with the steel wire ropes reserved at the second row of hanging points, the steel reinforcement cage is continuously placed down to the position of the second row of placing points after the square steel is removed, the steel reinforcement cage is lifted up after the shackles at the second row of hanging points are removed and connected with the steel wire ropes reserved at the first row of hanging points, the steel reinforcement cage is continuously placed down to the position of the first row of placing points after the square steel is removed, the shackles at the first row of hanging points are removed by the square steel positioning on the guide wall, and until the shackles of all the steel wire ropes are installed on the corresponding top of the whole steel reinforcement cage by the main crane, and the square steel reinforcement cage is continuously placed down to the design elevation by adopting the square steel positioning on the guide wall;
in the step S2, a first control unit acquires the tension readings of all tension sensors arranged in a first steel shoulder pole connected with a main hook of the main crane;
when the main crane descends the first section of steel reinforcement cage with the power corresponding to the preset descending speed, the first control unit judges whether to stop the descending of the first section of steel reinforcement cage according to the change condition of the instantaneous speed of the first section of steel reinforcement cage in the descending process before the first section of steel reinforcement cage reaches the first preset descending position,
If the instantaneous speed of the first section of reinforcement cage in the lowering process is kept unchanged, the first control unit judges that the first section of reinforcement cage is continuously lowered until the first section of reinforcement cage is lowered to a first preset lowering position;
if the difference between the instant speed of a certain moment t and the preset lowering speed of the first section of reinforcement cage in the lowering process is greater than 0.1 time of the preset lowering speed, the first control unit judges that the lowering of the first section of reinforcement cage is stopped, and an alarm arranged in a control room of the main crane sends out a clamping groove prompt;
when the first control unit judges that the first section of reinforcement cage stops being lowered, the first control unit obtains the lifting height of the first section of reinforcement cage according to the difference value between the instant speed at the moment and the preset lowering speed, wherein,
if the difference value between the instant speed at the moment and the preset lowering speed is larger than the preset speed difference value, the first control unit obtains that the lifting height of the first section of reinforcement cage is a first adjustment height;
if the difference value between the instant speed at the moment and the preset lowering speed is smaller than or equal to the preset speed difference value, the first control unit obtains that the lifting height of the first section of reinforcement cage is a second adjusting height;
When the main crane lifts the first section of reinforcement cage to the first adjusting height again, the main crane lowers the first section of reinforcement cage again; when the main crane lifts the first section of reinforcement cage to the second adjustment height again, the main crane lowers the first section of reinforcement cage again after acquiring the prompt of the completion of the checking of the slotted hole;
wherein, a first adjustment height r1=r0× Δv/. DELTA.v0 is set, a second adjustment height r2=l+. DELTA.h0 is set, wherein, R0 is a single standard lifting distance, DELTA.v0 is a preset speed difference value, DELTA.v is a difference value between an instant speed and a preset lowering speed, L is the height of the first section of reinforcement cage, and DELTA.h0 is a minimum ground clearance height of the reinforcement cage tail.
2. The construction method for hoisting the ultra-deep wall-connected reinforcement cage according to claim 1, wherein in the step S2, a second control unit obtains tension readings of each tension sensor arranged in a second steel shoulder pole connected with a main hook of the auxiliary crane, and transmits the tension readings to a first control unit, and the first control unit judges whether the first section of reinforcement cage is stable according to a difference value between a maximum tension reading and a minimum tension reading in the tension readings, wherein if the difference value between the maximum tension reading and the minimum tension reading is less than or equal to a maximum preset stress difference, the first control unit judges that the first section of reinforcement cage is stable; and if the difference value between the maximum tension reading and the minimum tension reading is larger than the maximum preset stress difference, the first control unit judges that the first section of reinforcement cage is inclined.
3. The construction method for hoisting the ultra-deep continuous wall reinforcement cage according to claim 2, wherein when the first control unit judges that the first section of reinforcement cage is inclined, the first control unit obtains a tension sensor A displaying maximum tension reading Fmax and a tension sensor B displaying minimum tension reading Fmin, if the tension sensor A and the tension sensor B are both connected with the first steel shoulder pole, the first control unit controls a main hook adjusting angle of the main crane to Fmax-Fmin less than or equal to delta F0, and if the tension sensor A and the tension sensor B are both connected with the second steel shoulder pole, the second control unit controls the main hook adjusting angle of the auxiliary crane to Fmax-Fmin less than or equal to delta F0; if the tension sensor A and the tension sensor B are respectively arranged below the first steel carrying pole and below the second steel carrying pole, the first control unit and the second control unit respectively control the main hook of the main crane and the main hook of the auxiliary crane to adjust the angles together so that Fmax-Fmin is less than or equal to delta F0, wherein the angle adjustment directions of the main hook of the main crane and the main hook of the auxiliary crane are opposite.
4. The construction method for hoisting the ultra-deep wall-connected reinforcement cage according to claim 3, wherein when the first section of reinforcement cage is confirmed to be stable, free of welding and deformation, a second control unit arranged in the auxiliary crane obtains the maximum hoisting height of the auxiliary crane to the first section of reinforcement cage according to the comparison result of the height of the first section of reinforcement cage and the height threshold value of the sectional reinforcement cage, and the maximum hoisting height of the auxiliary crane to the first section of reinforcement cage is determined or is determined by the ratio of the height of the first section of reinforcement cage to the height threshold value of the sectional reinforcement cage, or is equal to the minimum ground clearance height of the tail part of the reinforcement cage.
5. The construction method for hoisting the ultra-deep wall-connected reinforcement cage according to claim 4, wherein in the step S3, when the main crane is hoisting the first section of reinforcement cage to a second preset height, the auxiliary crane stops moving in the main crane direction, and the first control unit obtains the rotation angular velocity of the main crane according to the real-time horizontal distance between the main crane and the auxiliary crane, wherein the rotation angular velocity of the main crane is determined by the ratio of the real-time horizontal distance between the main crane and the auxiliary crane to the minimum preset distance between the main crane and the auxiliary crane, or the ratio of the difference between the real-time horizontal distance between the main crane and the minimum preset distance between the auxiliary crane to the real-time horizontal distance between the main crane and the auxiliary crane.
6. The construction method for hoisting the ultra-deep wall-connected reinforcement cage according to claim 5, wherein the second control unit obtains the horizontal angular velocity of the auxiliary crane in real time according to the inclination angle of the first section of reinforcement cage, wherein the horizontal angular velocity of the auxiliary crane is determined by the rotation angular velocity of the main crane;
when the auxiliary crane rotates along the rotation direction of the main crane to the point that the first section of reinforcement cage is perpendicular to the ground, the main crane stops rotating automatically, and the auxiliary crane stops rotating clockwise and unloads hooks.
7. The construction method for hoisting the ultra-deep wall-connected reinforcement cage according to claim 6, wherein when the auxiliary crane stops rotating forward and the hook is detached, the first control unit calculates the tail part ground clearance of the first section of reinforcement cage, and in the step S4, the first control unit obtains the moving speed of the main crane for moving the first section of reinforcement cage to the slot opening and the axis allowable deviation of the first section of reinforcement cage according to the weight of the first section of reinforcement cage and the tail part ground clearance of the first section of reinforcement cage, wherein the moving speed of the main crane for moving the first section of reinforcement cage to the slot opening and the axis allowable deviation of the first section of reinforcement cage are determined by the product of the ratio of the weight of the first section of reinforcement cage to the weight threshold of the sectional reinforcement cage and the ratio of the initial horizontal distance between the main crane and the auxiliary crane to the minimum preset distance between the auxiliary crane.
8. The construction method for hoisting the ultra-deep wall-connected reinforcement cage according to claim 7, wherein when the main crane moves the first section of reinforcement cage to the slot opening, the bottom axis of the first section of reinforcement cage is aligned with the central axis of the slot opening within the allowable deviation of the axis of the first section of reinforcement cage, the first control unit obtains the preset lowering speed of the main crane to the first section of reinforcement cage according to the allowable deviation of the axis of the first section of reinforcement cage, wherein,
The preset lowering speed of the main crane to the first section of reinforcement cage is determined by the ratio of the difference value between the width of the slotted hole opening and the width of the first section of reinforcement cage to the allowable deviation of the axis of the first section of reinforcement cage.
9. The construction method for hoisting the super-deep wall-connected reinforcement cage according to claim 8, wherein when the first control unit determines that the lowering of the first section of reinforcement cage is stopped, the first control unit obtains the lifting height of the main crane to the first section of reinforcement cage according to the difference between the instant speed of the moment t and the preset lowering speed, and the lifting height of the main crane to the first section of reinforcement cage is determined or is determined by the ratio of the instant speed of the moment t and the preset lowering speed to the preset speed difference, or is equal to the sum of the height of the first section of reinforcement cage and the minimum ground clearance height of the tail of the reinforcement cage.
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CN109969946A (en) * 2019-04-09 2019-07-05 西南林业大学 A kind of diaphram wall steel reinforcement cage hoisting and hanging construction safety method
CN211141282U (en) * 2019-10-22 2020-07-31 山西路桥建设集团有限公司 Steel reinforcement cage installation hoist device
WO2020244676A1 (en) * 2019-11-27 2020-12-10 中铁九局集团有限公司 Steel reinforcement cage for use in ventilation shaft diaphragm wall, and usage method
CN112482395A (en) * 2020-11-30 2021-03-12 中铁十一局集团有限公司 Construction method of cast-in-situ bored pile and inner support supporting structure of rail transit station
CN113353782A (en) * 2021-06-08 2021-09-07 中铁四局集团第五工程有限公司 Low-clearance ground wall-connected reinforcement cage rapid hoisting construction method
CN215326514U (en) * 2021-08-03 2021-12-28 陕西建工集团有限公司 Overall straightening system for overlong reinforcement cage
CN115341574A (en) * 2022-09-02 2022-11-15 中建八局第三建设有限公司 Hoisting construction method for reinforcement cage of special-shaped-amplitude underground diaphragm wall

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109969946A (en) * 2019-04-09 2019-07-05 西南林业大学 A kind of diaphram wall steel reinforcement cage hoisting and hanging construction safety method
CN211141282U (en) * 2019-10-22 2020-07-31 山西路桥建设集团有限公司 Steel reinforcement cage installation hoist device
WO2020244676A1 (en) * 2019-11-27 2020-12-10 中铁九局集团有限公司 Steel reinforcement cage for use in ventilation shaft diaphragm wall, and usage method
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