A Reinforcement Binding and Alignment Device for Columnar Foundation Holes and Its Application Method

Abstract

The present invention discloses a cylindrical foundation hole internal steel bar binding corrector and its application method. The corrector includes an inner ring guide rail, an outer ring guide rail, a pulley, a main steel bar fixture, and a pulley positioning fixture. The inner ring guide rail and the outer ring guide rail are concentrically arranged and connected into one body through radial connecting members. The pulley can slide along the inner ring guide rail and the outer ring guide rail simultaneously. The main steel bar fixture is connected to the pulley in a radially movable manner. The pulley positioning fixture can lock the two ends of the pulley. After the main steel bar passes through the pulley and the main steel bar fixture, it is locked by the main steel bar fixture. It can ensure the control of the elevation difference, spacing, and diameter of the main steel bar when the main steel bar is suspended, and complete the binding of the inner and outer stirrups in the lifted state, which can ensure that the steel reinforcement cage has high verticality, uniform joints, and is neat and beautiful after binding. It can also meet the binding requirements of steel reinforcement cages with different designed diameters, different specifications, and different numbers of main steel bars, and can be applied to various situations where the foundation types of overhead lines are diverse and the pile diameters, main steel bar specifications, and quantities are not unified.

Description

Technical Field

[0001] The present invention belongs to the field of overhead line project construction, and specifically relates to a cylindrical foundation hole internal steel bar binding corrector and its application method. Background Art

[0002] At present, due to the characteristics of artificial cylindrical foundations such as hole forming deviation, large hole diameter, and deep foundation, it is determined that the steel bars cannot be bound in the same way as large excavation foundations during steel bar binding and installation. This easily leads to phenomena such as overall flexible deformation of the steel bar cage caused by the self-weight of the steel bars, large height difference errors of the main steel bars of the steel bar cage bound in the pit hole due to uneven bottom of the pit, and insufficient steel bar protection distance. This results in repeated rework during the special inspection by the project department and on-site inspection by the supervisor. There is a very high probability of flexible deformation in the pit holes with longer steel bar cages. After the cage is bound in the pit hole as a whole, uneven force will cause the overall distortion of the S-shaped steel bar cage, leading to unqualified acceptance.

[0003] Currently, the closest binding technique is to perform single-piece hanging binding at the pit mouth after the main steel bars are lowered, and personnel complete the binding of the steel bar cage throughout the process in the pit. This technique can ensure that the overall height difference of the main steel bars of the steel bar cage is within the allowable error range, but it cannot ensure the process of the spacing of the main steel bars of the steel bar cage, the protective layer, and the overall verticality of the steel bar cage. Therefore, the existing technology still needs to be optimized. Summary of the Invention

[0004] The purpose of the present invention is to provide a general cylindrical foundation hole internal steel bar binding corrector and its application method that can not only ensure the binding quality of the steel bar cage but also ensure the binding efficiency and personnel safety.

[0005] The cylindrical foundation hole internal steel bar binding corrector provided by the present invention includes an inner ring guide rail, an outer ring guide rail, a pulley, a main steel bar clamp, and a pulley positioning clamp. The inner ring guide rail and the outer ring guide rail are concentrically arranged and connected into one body through radial connecting members. The pulley can slide along both the inner ring guide rail and the outer ring guide rail simultaneously. The main steel bar clamp is connected to the pulley in a radially movable manner. The pulley positioning clamp can lock both ends of the pulley. After the main steel bar passes through the pulley and the main steel bar clamp, it is locked by the main steel bar clamp.

[0006] In one implementation manner of the above technical solution, the cross-sectional shapes of the inner ring guide rail and the outer ring guide rail are both U-shaped, and the groove widths and depths of the two are the same.

[0007] In one implementation manner of the above technical solution, the pulley includes a frame and rollers connected to the bottom surfaces at both ends thereof. The positions of the two rollers respectively correspond to the groove openings of the inner ring guide rail and the outer ring guide rail.

[0008] In one implementation manner of the above technical solution, the frame is a U-shaped body, and a rectangular groove is opened on the bottom surface of the U-shaped body along its length direction.

[0009] In one embodiment of the above technical solution, the main reinforcement clamp includes a rectangular base plate, an externally threaded pipe, and a locking nut. The inner diameter of the externally threaded pipe is larger than the outer diameter of the main reinforcement. Multiple axial slots are provided at the upper part. The locking nut is connected to the slotted section of the externally threaded pipe. The width of the rectangular base plate is larger than the width of the rectangular slot on the vehicle frame. The lower end of the locking nut is fixed at the center position of the rectangular base plate.

[0010] In one embodiment of the above technical solution, the number of the pulley positioning clamps is twice the number of the pulleys. Each pulley positioning clamp includes a U-shaped body and a screw assembly. The screw assembly is arranged perpendicular to the side arm of the U-shaped body, and its screw can be screwed into the slot of the U-shaped body.

[0011] In one embodiment of the above technical solution, the width of the slot of the U-shaped body is larger than the sum of the height of the inner ring guide rail and the thickness of the bottom plate of the pulley.

[0012] In one embodiment of the above technical solution, the screw assembly includes the screw and its matching nut. The nut is welded to one side arm of the U-shaped body, and a force applying rod is threadedly connected to the outer end of the screw.

[0013] The method for tying the steel bars in the cylindrical foundation hole at the pit mouth of the foundation by using the above corrector provided by the present invention includes the following steps:

[0014] (1) Excavate the foundation pit, level the pit mouth, concentrically place a cylindrical steel mold at the pit mouth, and adjust the levelness of the steel mold;

[0015] (2) Assemble a jack outside the steel mold, and support and lift the corrector through the jack;

[0016] (3) Assemble the corrector and adjust the levelness of the overall inner ring guide rail and outer ring guide rail. Place the same number of pulleys on the inner ring track and outer ring track according to the number of main reinforcements;

[0017] (4) Pass each main reinforcement through the main reinforcement clamp and the pulley vehicle frame from top to bottom respectively. After adjusting the radial position, tighten the locking nut of the main reinforcement clamp;

[0018] (5) Adjust the upper end surfaces of each main reinforcement to be at the same specified horizontal plane, so that the main reinforcement hangs on the pulley vehicle frame by its own weight;

[0019] (6) Move the main reinforcement with the fixed radial position to the specified position along with the pulley, and lock the pulley on the inner ring track and outer ring track through the pulley positioning clamp;

[0020] (7) The steel reinforcement cage is tied from top to bottom at the pit mouth. The single tying height is half of the stroke of the jack. After each tying is completed, a section steel is placed on the top surface of the steel formwork. After the jack is unloaded from the corrector, the steel reinforcement cage is completely supported by the section steel. Then, the stroke of the jack is adjusted upward again, and the corrector is re-supported to bear the force, and the next tying operation is started. This cycle is repeated until the entire height of the steel reinforcement cage is tied at the pit mouth.

[0021] The corrector of the present invention is provided with an inner ring guide rail and an outer ring guide rail integral part arranged concentrically, so that the inner ring guide rail and the outer ring guide rail guide the circumferential movement of the pulley. After the main reinforcement clamp holds the main reinforcement, it can move radially along the pulley to adjust the radial position of the main reinforcement. After the radial position of the main reinforcement is adjusted, it can be suspended on the pulley by its own weight and adjust the spacing along with the circumferential movement of the pulley. Thus, the circumferential and radial positions of the main reinforcement are adjusted in place. Obviously, this adjustment has universality, can meet the positioning of different design sizes of the main reinforcement arrangement, and can ensure the verticality of the steel reinforcement cage. When tying the steel reinforcement cage, through the cooperation of this corrector and the jack to adjust the stroke in sections, the whole tying of the steel reinforcement cage can be realized in the foundation pit orifice in batches. The operators do not need to go down to the bottom of the pit, which greatly reduces the construction safety risk and greatly improves the steel bar tying efficiency. In short, the present invention can ensure that the control of the elevation difference, the spacing control, and the diameter control of the main reinforcement can be completed when the main reinforcement is suspended, and the inner and outer stirrups can be tied in the hoisted state, and it can ensure that the steel reinforcement cage has high verticality, uniform nodes, and is neat and beautiful after tying. Moreover, it can also meet the tying requirements of steel reinforcement cages with different design diameters, different specifications, and different numbers of main reinforcements, and can be applied to various situations where the foundation types of overhead lines are diverse, and the pile diameters, main reinforcement specifications, and numbers are not unified. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a top view schematic diagram of an embodiment of the present invention (only one set of pulleys is shown locked).

[0023] Figure 2 is Figure 1 an enlarged schematic view of part A in

[0024] Figure 3 is Figure 2 a schematic diagram of B-B in

[0025] Figure 4 is Figure 2 a schematic diagram of view C in

[0026] Figure 5 is Figure 4 a left view schematic diagram of the pulley positioning clamp in DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] As Figure 1As shown in the figure, the cylindrical foundation hole inner steel bar binding corrector disclosed in this embodiment includes an inner ring guide rail 1, an outer ring guide rail 2, a pulley 3, a main steel bar fixture 4, and a pulley positioning fixture 5.

[0028] Combined Figures 1 to 3 It can be seen that the cross-sectional shapes of the inner ring guide rail 1 and the outer ring guide rail 2 are both U-shaped, and the slot widths and depths of both are the same.

[0029] The inner ring guide rail 1 and the outer ring guide rail 2 are concentrically arranged and connected into one body by a radial connecting member 6. The radial connecting member 6 can be flexibly selected from thick steel plates or section steels such as channel steels and square tubes.

[0030] The connection position of the radial connecting member 6 needs to avoid the position of the main steel bars, and the number of settings is determined according to actual needs. At the same time, the connection position of the radial connecting member cannot affect the circumferential movement of the pulley.

[0031] Combined Figures 1 to 3 It can be seen that the pulley 3 includes a frame 31 and rollers 32 connected to the bottom surfaces at both ends. The frame 31 is a U-shaped body, and a rectangular groove is opened on the bottom surface of the U-shaped body along its length direction.

[0032] The number of pulleys 3 is the same as the number of main steel bars of the steel reinforcement cage. Each pulley realizes circumferential movement by placing the rollers 32 at both ends in the slots of the inner ring guide rail 1 and the outer ring guide rail 2 respectively.

[0033] The length of the frame 31 is at least equal to the distance between the outer sides of the two guide rails. The wheel diameter of the roller 32 is selected to ensure that the bottom surface of the frame can contact the top surfaces of the inner ring guide rail and the outer ring guide rail, so as to realize its guiding function and the transmission of force at the same time.

[0034] Combined Figures 1 to 3 It can be seen that the main steel bar fixture 4 includes a rectangular bottom plate 41, an external threaded pipe 42, and a locking nut 43. The width of the rectangular bottom plate 41 is greater than the width of the rectangular groove on the frame 31. Multiple axial grooves are opened on the upper part of the external threaded pipe 42, and the lower end is fixed at the central position of the rectangular bottom plate 41. The locking nut 43 is connected to the grooved section of the external threaded pipe 42.

[0035] The inner diameter of the external threaded pipe is larger than the outer diameter of the main steel bar with the largest diameter in the statistical specifications. With the axial grooves opened on its upper part, the main steel bar fixture can be applied to the fixation of main steel bars with different diameters.

[0036] Combined Figure 1 、 Figure 2 、 Figure 4 and Figure 5 It can be seen that the pulley positioning fixture 5 includes a U-shaped body 51 and a screw assembly. The screw assembly includes a screw 52 and its matching nut 53. The nut is welded to the outer side of the side arm of the U-shaped body 51, and a force application rod 54 is threadedly connected to the outer end of the screw 52.

[0037] A pulley 3 is configured with two pulley positioning clamps 5. The two pulley positioning clamps 5 respectively lock the two ends of the pulley to the corresponding guide rails. That is, the notches of the U-shaped part 51 of the pulley positioning clamp 5 simultaneously enclose the guide rail and the bottom plate of the vehicle frame, and then the screw 52 is screwed into the notch of the U-shaped part to lock the bottom plate of the pulley 3.

[0038] Since the weights of the steel cage of cylindrical foundations with different diameters are different, in order to ensure the safe use of the corrector, the sizes of the inner ring guide rail, the outer ring guide rail and the pulley will be different. To make the corrector universal, the notch depth of the U-shaped body 51 is designed to be greater than the sum of the total height of the guide rail and the thickness of the pulley bottom plate, so that the notch of the U-shaped clamp 51 can enclose guide rails and pulley bottom plates with different sizes.

[0039] When assembling this corrector, the rollers 32 at both ends of the pulley 3 are respectively placed in the notches of the inner ring guide rail 1 and the outer ring guide rail 2, and the two ends of the bottom surface of the vehicle frame 31 of the pulley are respectively located on the top surfaces of the inner ring guide rail and the outer ring guide rail.

[0040] The main reinforcement clamp 4 is located in the notch of the pulley vehicle frame, and its rectangular bottom plate is placed on the inner surface of the vehicle frame 31.

[0041] The steps for binding the steel cage in the cylindrical foundation hole at the pit mouth using this corrector are as follows:

[0042] (1) Excavate the foundation pit, level the pit mouth, place a cylindrical steel form concentrically at the pit mouth, and adjust the levelness of the steel form. At the same time, carry out steel bar processing at the material station. By aligning and stacking the main reinforcements and marking and cutting, ensure that the single root length of the main reinforcements is unified.

[0043] (2) Assemble the jacks outside the steel form, and support and lift the corrector through the jacks.

[0044] Uniformly arrange three to four jacks with a stroke of about 1.5 - 1.8 meters outside the steel form as the supporting devices, and adjust the levelness of the jack lifting heads through a bubble level and make all the jack lifting heads coplanar.

[0045] (3) Assemble the corrector and adjust the levelness of the overall parts of the inner ring guide rail and the outer ring guide rail. Place the same number of pulleys on the inner ring track and the outer ring track according to the number of main reinforcements.

[0046] (4) Pass each main reinforcement through each main reinforcement clamp and the pulley vehicle frame from top to bottom respectively. After adjusting the radial position, tighten the locking nut of the main reinforcement clamp.

[0047] (5) Control the elevation difference of the main reinforcements through a bubble level, adjust the upper end surfaces of each main reinforcement to be at the same specified horizontal plane, and make the main reinforcements naturally hang on the pulley vehicle frame by their own weights.

[0048] (6) Move the main reinforcement bars with their radial positions fixed to the designated position along with the pulley, and lock the pulley on the inner ring track and the outer ring track through the pulley positioning fixture.

[0049] (7) Bind the steel reinforcement cage from top to bottom at the pit opening. The single binding height is half of the stroke of the jack. After each single binding is completed, place the section steel on the top surface of the steel formwork. After unloading the jack from the corrector, the section steel completely supports the steel reinforcement cage. Readjust the stroke of the jack upward and re-support the corrector to bear the force, and start the next binding operation. Repeat this cycle until the entire height of the steel reinforcement cage is bound at the pit opening.

[0050] From the above structure of this corrector and the process of binding the steel reinforcement cage using this corrector, it can be seen that the present invention has the following advantages:

[0051] It can achieve fine adjustment and fixation of the spacing, elevation difference, and protective layer of the main reinforcement bars of the steel reinforcement cage before binding. Use the self-weight of the cage body for hoisting and binding to ensure the verticality of the steel reinforcement cage, and the quality process is perfect.

[0052] When binding the steel reinforcement cage at the pit opening, personnel can move flexibly on the ground, improving the operation efficiency, and successfully avoiding the increased safety risk level and time consumption caused by stepping on bamboo jump boards and wearing safety belts during binding in the pit in the prior art.

[0053] Install a pulley between the double concentric guide rails. The pulley can travel circumferentially, and the main reinforcement fixture can adjust the radial position along the pulley frame, which can be applicable to the binding of steel reinforcement cages with different main reinforcement spacings and different diameters, and has universality.

[0054] With a one-time investment, by saving man-hours and improving work efficiency, the cost can be gradually recovered, and it can be reused for multiple projects, with good economic benefits.

[0055] After verification, the steel reinforcement cage bound using this corrector can pass the acceptance inspection in sequence.

Claims

1. A method for tying steel bars in a cylindrical foundation hole, characterized in that: The corrector adopted in the method comprises an inner ring guide rail, an outer ring guide rail, a pulley, a main reinforcement fixture and a pulley positioning fixture. The inner ring guide rail and the outer ring guide rail are concentrically arranged and connected into an integral body through a radial connecting member. The pulley can slide along the inner ring guide rail and the outer ring guide rail simultaneously. The main reinforcement fixture is connected to the pulley in a radially movable manner. The pulley positioning fixture can lock both ends of the pulley. The main reinforcement passes through the pulley and the main reinforcement fixture and is locked by the main reinforcement fixture; The cross-sectional shapes of the inner ring guide rail and the outer ring guide rail are both U-shaped, and the notch widths and depths of the two are the same; The pulley comprises a vehicle frame and rollers connected to the bottom surfaces at both ends thereof. The positions of the two rollers respectively correspond to the notches of the inner ring guide rail and the outer ring guide rail; The main reinforcement fixture comprises a rectangular bottom plate, an external threaded pipe and a locking nut. The inner diameter of the external threaded pipe is larger than the outer diameter of the main reinforcement. A plurality of axial grooves are formed in the upper part. The locking nut is connected to the grooved section of the external threaded pipe. The width of the rectangular bottom plate is larger than the width of the rectangular groove on the vehicle frame. The lower end of the locking nut is fixed at the central position of the rectangular bottom plate; The binding steps are as follows: (1) Excavate a foundation pit, level the pit mouth, concentrically place a cylindrical steel form on the pit mouth, and adjust the levelness of the steel form; (2) Assemble a jack outside the steel form and support and lift the corrector through the jack; (3) Assemble the corrector and adjust the levelness of the integral body of the inner ring guide rail and the outer ring guide rail. Place the same number of pulleys on the inner ring track and the outer ring track according to the number of main reinforcements; (4) Respectively pass each main reinforcement from top to bottom through the external threaded pipe of each main reinforcement fixture and the vehicle frame of the pulley. After adjusting the radial position, tighten the locking nut of the main reinforcement fixture; (5) Adjust the upper end surfaces of the main reinforcements to be at the same specified horizontal plane, so that the main reinforcements are suspended on the vehicle frame of the pulley by their own weights; (6) Move the main reinforcements with the fixed radial positions to the specified positions along with the pulley, and lock the pulley on the inner ring track and the outer ring track through the pulley positioning fixture; (7) Conduct binding of the steel reinforcement cage from top to bottom at the pit mouth. The single binding height is half of the stroke of the jack. After each single binding is completed, place a section steel on the top surface of the steel form. After unloading the jack to disengage from the corrector, the steel reinforcement cage is completely supported by the section steel. Readjust the stroke of the jack upwards and re-support the corrector to bear the force, and start the next binding operation. In this way, the cycle is repeated until the entire height of the steel reinforcement cage is bound at the pit mouth.

2. The method for tying steel bars in the cylindrical foundation hole as described in claim 1, characterized in that: The vehicle frame is a U-shaped body, and a rectangular groove is formed in the bottom surface of the U-shaped body along its length direction; 3. The method for binding steel bars in the cylindrical foundation hole as claimed in claim 1, wherein: The number of the pulley positioning fixtures is twice the number of the pulleys. Each pulley positioning fixture comprises a U-shaped body and a screw rod assembly. The screw rod assembly is arranged perpendicular to the side arm of the U-shaped body, and its screw rod can be screwed into the notch of the U-shaped body; 4. The method for tying steel bars in the cylindrical foundation hole as described in claim 3, characterized in that: The notch width of the U-shaped body is larger than the sum of the height of the inner ring guide rail and the thickness of the bottom plate of the pulley; 5. The method for tying steel bars in the cylindrical foundation hole as described in claim 3, characterized in that: The screw rod assembly comprises the screw rod and its matching nut. The nut is welded to one side arm of the U-shaped body, and a force application rod is threadedly connected to the outer end of the screw rod.

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