Mounting and positioning jig frame for hole pile reinforcement cage

Abstract

The utility model relates to a positioning jig frame for mounting a hole pile reinforcement cage. The positioning jig frame comprises positioning inserting and pulling rods, a positioning frame and frame supporting legs, the positioning inserting and pulling rods are centering staying and hanging parts for controlling the height of the reinforcement cage relative to a hole when a crane is matched to hoist the hole pile reinforcement cage, and the four-corner positioning inserting and pulling rods can be inserted below structural reinforcing ribs on the circumference of the reinforcement cage at the same time; the positioning frame is of a square frame structure made of profile steel with a certain specification, two positioning cross beams for mounting and fixing the positioning plugging rods are welded at each of four corners of the upper top surface of the positioning frame, and fixing holes matched with the cross sections of the positioning plugging rods are formed in the positioning cross beams along the diagonal positions of the square frame; the frame supporting legs are columnar components welded to the four corners of the bottom face of the positioning frame and used for supporting and leveling the positioning frame. The hole pile reinforcement cage installing and positioning device has the advantages of being capable of accurately controlling installing and positioning of a hole pile reinforcement cage through height adjustment of the frame supporting legs and horizontal movement of the frame supporting legs on the positioning inserting and pulling rods, high in practicability, low in cost and convenient to apply and popularize.

Description

Technical Field

[0001] The utility model relates to the technical field of installation and positioning of bored pile reinforcement cages, in particular to an installation and positioning tire frame for bored pile reinforcement cages. Background Art

[0002] Bored piles are widely used in piers, beam-column foundations in railways, highways, municipal engineering, and housing construction projects. Not only are there pile-driving equipment suitable for various working conditions to choose from and the construction technology is mature, but also the construction safety, efficiency, and quality are all well guaranteed. Therefore, they have been widely used in the field of domestic construction engineering. Bored piles, as the name implies, are first drilled and then piled. That is, a drilling rig that meets the working conditions is used to drill vertically downward at the designed foundation surface position, and then a steel cage is placed in the drilled hole. Finally, concrete is poured from bottom to top to form reinforced concrete structural piles to withstand the pressure of the superstructure of the project and resist overturning force.

[0003] The traditional installation of bored pile reinforcement cage generally uses the circumference of the steel casing to prevent the hole from collapsing during drilling as support, and adopts two The steel pipe crossarm is on the circumference of the steel casing. Since the steel casing only relies on the friction between the outer wall and the surrounding soil to maintain its own stability, when the steel casing is subjected to additional pressure from the top, it will sink and deflect. At the same time, the two The stability of the steel pipe on the top of the steel casing is difficult to control. When the steel casing is tilted, the steel pipe bearing the weight of the steel cage will roll downward, causing the steel cage to shift and tilt. In severe cases, the steel cage will contact the soil on the hole wall, resulting in insufficient thickness of the pile concrete protective layer and easy corrosion of exposed steel bars, thus affecting the durability of the reinforced concrete pile. If a pile foundation bearing test is performed, it is likely to show insufficient bearing capacity and cause major quality defects. Utility Model Content

[0004] The utility model aims to solve the above problems and provide a hole pile reinforcement cage installation positioning frame which has reasonable design, simple structure, convenient manufacture, economy and practicality and good use effect.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A positioning frame for installing a bored pile reinforcement cage, characterized in that it includes three parts: a positioning plug-in rod, a positioning frame, and a frame leg; the positioning plug-in rod is a stop suspension component that controls the height and centering of the reinforcement cage relative to the hole mouth when the crane cooperates to lift the bored pile reinforcement cage, is located at the four corners of the positioning frame and extends diagonally toward its center, when the reinforcement cage is lowered to a certain working position, the four-corner positioning plug-in rods can be simultaneously inserted under the structural reinforcement ribs on the horizontal plane of the circumference of the reinforcement cage, and bear the weight of all the reinforcement cages connected up and down; the positioning frame is a square frame structure made of steel sections of a certain specification, and two positioning crossbeams for installing and fixing the positioning plug-in rods are welded at the four corners of the upper top surface, and a fixing hole adapted to the cross section of the positioning plug-in rod is opened on the positioning crossbeam along the diagonal position of the square frame, and the positioning plug-in rod is inserted therein and can move forward and backward along the diagonal of the square frame to realize the suspension positioning of the reinforcement cage; the frame leg is a columnar member welded to the four corners of the bottom surface of the positioning frame, which is used to support and level the positioning frame.

[0007] Furthermore, the positioning plug-in rod is made of steel of a certain specification, installed and fixed in the fixing hole opened on the positioning beam along the diagonal position of the square frame, and its outer end is welded and fixed with a handle for pushing and pulling the positioning plug-in rod, and the inner end is chamfered at about 1:20 along the length direction of both sides of the leg width. During operation, the relative height deviation of the top surface of the four positioning plug-in rods is ≤1cm. When the steel cage is lowered to a certain working position, the crane stops lowering the steel cage, and by pushing and pulling their respective handles, the four positioning plug-in rods can be inserted into the structural reinforcement ribs on the horizontal surface of the inner circumference of the steel cage along the diagonal direction of the square frame. The crane continues to lower the steel cage, and the steel cage is suspended on the positioning plug-in rod;

[0008] The specifications of the positioning plug-in rod steel are 1 to 2 models smaller than those of the positioning crossbeam steel. For example, when the positioning crossbeam uses "G16", the positioning plug-in rod can use "G14" or "G12". The length is suitable for the steel cage suspension with a smaller hole diameter. For example, when the diameter of the hole pile is 1.0m, the total length of the positioning plug-in rod can be determined to be 1.1m. At this time, it is still applicable to the steel cage suspension with a larger diameter.

[0009] The handle is a rod-shaped or ring-shaped member, not limited to steel bars or pipes, and can meet the plug-in and pull-out force requirements and facilitate operation and gripping habits, such as: Pipe, or When the threaded steel bar is coiled into a ring, it can also be pulled by inserting a wooden stick.

[0010] Furthermore, the positioning frame is welded with steel sections of the same specifications as the positioning crossbeam, and its size is determined by the diameter of the pile and the diameter of the steel casing at the hole. When the same construction site is designed with several diameters of piles and the difference is not large, the positioning frame can be manufactured according to the steel cage installation requirements that meet the maximum pile diameter, and the outer diameter of the steel casing at the hole must be calculated. For example, if a certain project is designed with three types of pile diameters of 1.0m, 1.25m, and 1.5m, then the "maximum pile diameter" can be used. + The diameter of the steel casing at the hole is enlarged by 0.5 to 0.6 m”, and the size of the positioning frame is determined to be 2.5×2.5 m square. The positioning frame is suitable for the installation of steel cages with the above three hole diameters;

[0011] The positioning beams have two inner and outer ones. The inner edge of the inner positioning beam is tangent to the inscribed circle of the square positioning frame. The outer positioning beam is parallel to the inner positioning beam with a spacing of about 30 cm. To ensure that the positioning frame is torsion-resistant and has sufficient rigidity, a steel reinforcement rib of the same specification is welded in the inner cavity of the positioning frame corresponding to the lower part of the inner positioning beam.

[0012] The web center of the positioning crossbeam I-beam has an opening, the size of the opening is determined by the size of the positioning plug-in rod and a certain widening size, so that when the positioning plug-in rod is perpendicular to the web plane and penetrates therein, a directional channel that can move forward and backward along the diagonal of the square frame is formed. Therefore, the size of the positioning crossbeam steel must be larger than the size of the positioning plug-in rod steel, and the size of the opening is as follows: the positioning plug-in rod I-beam (height + 10) mm × (leg width + 10) mm;

[0013] The lifting lugs are cut from common steel plates and welded between two positioning cross beams at the four corners of the positioning frame.

[0014] Furthermore, the frame legs are four columnar components welded to the four corners of the bottom surface of the positioning frame, used to support and level the positioning frame, and are composed of a hollow sleeve with trapezoidal nuts built into both ends, and a trapezoidal screw and an iron pad used in pair with the trapezoidal nuts;

[0015] The trapezoidal screw and the trapezoidal nut are standard parts, and when the trapezoidal nut is made into a flange shape, it is conducive to screw guiding, improving strength and enhancing stability. However, the thread rotation directions of the upper and lower paired screws and nuts are different, that is, when the upper part is a left-handed thread pair, the lower part should be a right-handed thread pair, thereby forming an effect that the frame legs can be quickly raised and lowered by rotating the hollow sleeve; by raising or lowering the four frame legs, the positioning frame is adjusted to a horizontal state with the help of a level ruler, thereby achieving the purpose of controlling the steel cage to be in a plumb state;

[0016] The hollow sleeve is made of seamless steel pipe, and the trapezoidal nuts embedded at both ends are welded to the end faces of the hollow sleeve; at the vertical middle position of the outer wall of the barrel of the hollow sleeve, 1 to 2 through holes with a diameter of about 30 mm for the torsion of the sleeve are drilled. When 2 through holes are provided, their axes should be perpendicular to each other and perpendicular to the axis of the hollow sleeve, and should be offset by a distance of one hole diameter up and down;

[0017] The iron backing plate is welded to the lower end of the trapezoidal screw rod and is a circular or square steel plate for expanding the contact surface to increase the stability during the grounding installation of the positioning jig.

[0018] Furthermore, the positioning insertion and extraction rod, the positioning frame, and the hollow sleeve are all made of section steel, and the section steel is not limited to I-beams and / or channel steels, round tubes and / or square tubes; the positioning frame is set as a square frame structure for a detailed structural description, and it can actually also be circular.

[0019] Furthermore, an operation control method for a positioning jig for the installation of a bored pile steel cage is characterized by including the following steps:

[0020] a) Operation preparation: Purchase profiles, standard parts, etc. from the market, and use common machining equipment to process the positioning jig. For example: use "I16" to process the positioning frame, positioning cross beam and stiffeners; use "I12" to process the positioning insertion and extraction rod; use D89×4.5 seamless steel pipe to process the hollow sleeve; use δ16 steel plate to process the iron backing plate; customize and purchase M52×5 trapezoidal screw rod, trapezoidal nut assembly, etc. Prepare several square timbers for supporting the positioning frame; prepare several 1 cm thick hardwood blocks for the vertical deviation correction of the steel cage; prepare several straight thread sleeves for the connection of the steel cage during the shift.

[0021] b) Positioning frame in-place adjustment: When the depth of the bored pile hole reaches the design value and meets the installation requirements of the steel cage into the hole, level the ground around the hole opening, use a crane and lifting lugs to lift and place the positioning frame outside the steel casing at the hole opening and try to align it in the middle as much as possible, and there is no interference between them; it is required that the ground below the iron backing plate is basically dense, otherwise add square timbers under the iron backing plate to ensure the stable placement of the positioning frame; use a spirit level to check the level of the top surface of the positioning frame, and use the through holes of the hollow sleeve to twist the hollow sleeve with a crowbar or other rod-shaped objects to raise or lower the legs of the frame, so as to adjust the positioning frame to a horizontal state;

[0022] c) The first section of the steel cage is hoisted and installed by adjusting the spatial position: the main reinforcement of the steel cage is fixed length steel, such as fixed length of 10m or 12m. When the bored pile is designed to have a hole depth of 40m, the steel cage can be factory processed in 4×10m sections and then transported to the construction site for connection and installation. When the steel cage is hoisted into the hole, it is lifted vertically by a crane. When the first section is slowly lowered into the pile hole, care should be taken to minimize the scratches between the steel cage and the steel casing at the hole mouth and the hole wall below the steel casing. When the structural reinforcement at the tail of the first section of the steel cage is about 10 cm away from the top surface of the positioning plug-in rod, the crane stops lowering the steel cage, and the positioning plug-in rods at the four corners of the positioning frame are manually pushed into the steel cage by more than 10 cm. The crane continues to lower the steel cage until the structural reinforcement contacts the positioning plug-in rod. The steel cage is manually held by hand to check and adjust that the steel cage should be in the middle position relative to the steel casing, and confirm that the distance between the spiral reinforcement on the outside of the steel cage and the inner wall of the steel casing should be basically the same. Then, the crane completely releases the steel cage to allow the positioning plug-in rod to bear the weight, and the hoist is removed to hoist the second section of the steel cage;

[0023] d) The second section of the steel cage is in place and connected with the previous section of the steel cage by straight thread and installed: the second section of the steel cage is vertically transferred by the crane to the top of the first section of the steel cage, and when its lower end is about 1m away from the upper end of the first section, the crane reduces the moving speed of the steel cage, uses the wind rope to limit the swing of the second section of the steel cage and slowly approaches the upper end of the first section, compares the reserved length sequence of the joints of the steel cage and the main reinforcement (the joint rate of the same cross section must be ≤50%), rotates the second section of the steel cage to make the main reinforcement "long on top and short on bottom, short on bottom and long on top" correspond one by one, suspends the steel cage by the crane, manually removes the protective plastic cap on the roller-pressed straight thread of the main reinforcement end of the steel cage, and uses the prepared The straight thread sleeves are connected one by one; after checking the torque of the straight thread sleeve and that all the main bars have been connected, the crane slowly lifts the two connected sections of the steel cage upwards again and hovers until the positioning plug-in rod is no longer under force and then pulls them out respectively. The crane resumes lowering the second section of the steel cage into the hole until the tail structural reinforcement approaches the top surface of the positioning plug-in rod again. It hovers, inserts the positioning plug-in rod, checks and adjusts the steel cage to be centered and vertical relative to the steel casing, and makes the positioning plug-in rod bear all the weight of the connected steel cage, waiting for the next section to repeat the main bar straight thread connection; this is repeated until all the steel cages of the designed length in the same pile hole are hoisted into place and meet the design requirements.

[0024] e) Check the qualified installation of the steel cage and pour the bored pile concrete: When the steel cage is supported by the positioning plug-in rod and has vertical deflection, considering the position deviation caused by the circumferential plane of the reinforcement of the steel cage structure not being perpendicular to the axis of the steel cage, hard miscellaneous wood pads can be added to the top surface of one or two positioning plug-in rods on the deflected side when the steel cage is lowered by a crane for centering and vertical adjustment. After confirming that the steel cage is centered relative to the steel casing and the verticality meets the requirements (0.1%), the bored pile concrete should be poured in time to ensure the quality of the reinforced concrete pile.

[0025] f) Repeat steps b) to e) to complete the installation and positioning of all bored pile reinforcement cages and bored pile concrete construction within the planned scope.

[0026] The beneficial effects of the utility model are:

[0027] The utility model is mainly proposed to solve the problem that the relative position accuracy of the steel cage installation of the hole pile in the prior art is prone to deviation, which affects the thickness of the steel bar protective layer of the hole pile and the quality of the reinforced concrete pile, and the quality problems after the pile is formed are difficult to rectify and the cost increases exponentially. The positioning tire frame is novel and reasonable in design, simple in structure, and easy to use.

[0028] The positioning rod, positioning frame and hollow sleeve are all made of steel, and the steel plate used for the iron pad is ordinary plate. The production materials are easy to obtain and the cost is low. The main processing steps are cutting and welding. It can be processed by yourself or outsourced.

[0029] Trapezoidal screws and trapezoidal nuts are standard parts and can be processed by yourself or obtained from the hardware market.

[0030] When the positioning frame is processed into a square, it has reinforcing ribs at the four corners, so the overall rigidity is better than that of a circular frame. The straight line components are easier to control and process. The installation and positioning of the four frame legs are simple and more conducive to overall force.

[0031] The size of the positioning frame is manufactured according to the steel cage installation requirements corresponding to the largest hole pile diameter among several hole pile diameters designed for the same construction site. There is no need to make more frames with different hole diameters, and frequently replace steel cage installation frames of different sizes during construction, thereby improving the use efficiency of the same positioning frame and having better practicality.

[0032] The positioning plug-in rod has a hole in the center of the web of the positioning beam to form a directional channel. The structure is simple, the positioning plug-in rod leg width and the contact surface with the web of the positioning beam are small, the plug-in resistance is small, and the hanging and releasing of the steel cage are simple and quick.

[0033] By adjusting the horizontal state of the positioning frame through the forward and reverse screws of the frame legs, and adjusting the height of the accidental deviation of the steel cage in the vertical direction on the top of the positioning plug-in rod, the installation positioning of the bored pile steel cage can be accurately controlled to ensure that the steel cage is installed centered relative to the center of the pile hole and that the verticality meets the requirements of the specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings described below are only for the purpose of more clearly illustrating the technical solutions of the embodiments of the present invention or the prior art. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0035] Figure 1 It is a structural schematic diagram of the utility model.

[0036] Figure 2 for Figure 1 main view.

[0037] Figure 3 for Figure 2 A zoomed in view of the midframe legs.

[0038] Figure 4 It is a schematic diagram of the method of use of the utility model.

[0039] Figure 5 The utility model is a flow chart of the method of use.

[0040] Description of reference numerals:

[0041] 1—Positioning plug-in rod; 1-1—Handle; 2—Positioning frame;

[0042] 2-1—Reinforcement rib; 2-2—Lifting lug; 2-3—Internal positioning beam;

[0043] 2-4—outer positioning beam; 3—frame support leg; 3-1—trapezoidal screw (left-handed);

[0044] 3-2—trapezoidal nut (left-handed); 3-3—hollow sleeve; 3-4—trapezoidal screw (right-handed);

[0045] 3-5—Trapezoidal nut (right-hand rotation); 3-6—Iron pad. DETAILED DESCRIPTION

[0046] like Figure 1 , Figure 2 , Figure 3The shown type of bored pile reinforcement cage installation positioning frame comprises three parts: a positioning plug-in rod 1, a positioning frame 2, and a frame leg 3; the positioning plug-in rod 1 is a stop and suspension component for controlling the height and centering of the reinforcement cage relative to the hole mouth when the crane cooperates to lift the bored pile reinforcement cage. When the reinforcement cage is lowered to a certain working position, the four-corner positioning plug-in rods 1 can be simultaneously inserted under the structural reinforcement ribs on the horizontal plane of the circumference of the reinforcement cage, and bear the weight of all the reinforcement cages connected up and down; the positioning frame 2 is a square frame structure made of steel sections, and two positioning crossbeams 2-3 and 2-4 for installing and fixing the positioning plug-in rods 1 are welded at the four corners of the upper top surface, and fixing holes adapted to the cross sections of the positioning plug-in rods 1 are opened on the positioning crossbeams 2-3 and 2-4 along the diagonal position of the square frame, and the positioning plug-in rod 1 is inserted therein and can move forward and backward along the diagonal of the square frame; the frame leg 3 is a columnar member welded to the four corners of the bottom surface of the positioning frame 2, and is used to support and level the positioning frame 2.

[0047] In this embodiment, the positioning plug-in rod 1 is made of steel of a certain specification, installed and fixed in the fixing holes opened along the diagonal position of the positioning beams 2-3 and 2-4, and the handle 1-1 for pushing and pulling the positioning plug-in rod 1 is welded and fixed on its outer end, and the inner end is chamfered at about 1:20 along the length direction of both sides of the leg width. During operation, the relative height deviation of the top surface of the four positioning plug-in rods 1 is ≤1cm. When the steel cage is lowered to a certain working position, the crane stops lowering the steel cage, and by pushing and pulling each handle 1-1, the four positioning plug-in rods 1 can be inserted into the structural reinforcement ribs on the horizontal surface of the inner circumference of the steel cage along the diagonal direction of the square frame. The crane continues to lower the steel cage, and the steel cage is suspended on the positioning plug-in rod 1;

[0048] The steel specifications of the positioning plug-in rod 1 are 1 to 2 types smaller than those of the positioning beams 2-3 and 2-4. For example, when the positioning beams 2-3 and 2-4 use "G16", the positioning plug-in rod 1 can use "G14" or "G12". The length can be suitable for the steel cage suspension with a smaller hole diameter. For example, when the diameter of the hole pile is 1.0m, the total length of the positioning plug-in rod 1 can be determined to be 1.1m. At this time, it can still be used for the steel cage suspension with a larger diameter.

[0049] The handle 1-1 is a rod-shaped or ring-shaped member, not limited to steel bars or pipes, and can meet the plug-in and pull-out force requirements and facilitate operation and gripping habits, such as: Pipe, or When the threaded steel bar is coiled into a ring, it can also be pulled by inserting a wooden stick.

[0050] The positioning frame 2 is welded with steel of the same specifications as the positioning cross beams 2-3 and 2-4. When the same construction site is designed with several diameters of piles and the difference is not large, the positioning frame 2 can be manufactured according to the steel cage installation requirements that meet the maximum pile diameter. At the same time, the outer diameter of the steel casing at the hole must be calculated. For example, if a certain project is designed with three types of pile diameters of 1.0m, 1.25m, and 1.5m, the maximum pile diameter can be calculated. + The diameter expansion value of the steel casing at the hole is 0.5 to 0.6 m”, which determines that the size of the positioning frame 2 is 2.5×2.5 m square. This positioning frame is suitable for the installation of steel cages with the above three hole diameters;

[0051] The positioning beams 2-3 and 2-4 have two inner and outer beams. The inner edge of the inner positioning beam 2-4 is tangent to the inscribed circle of the square positioning frame 2. The outer positioning beam 2-3 is parallel to the inner positioning beam 2-4 with a spacing of about 30 cm. To ensure that the positioning frame 2 is torsion-resistant and has sufficient rigidity, a steel reinforcement rib 2-1 of the same specification is welded in the inner cavity of the positioning frame 2 corresponding to the lower part of the inner positioning beam 2-4.

[0052] The positioning cross beams 2-3 and 2-4 have openings in the center of the I-beam webs, and the size of the openings is determined by the size of the positioning plug-in rod 1 and a certain widening size, so that the positioning plug-in rod 1 is perpendicular to the web plane and penetrates therein. Therefore, the size of the positioning cross beams 2-3 and 2-4 steel must be larger than the size of the positioning plug-in rod 1 steel, and the size of the openings is as follows: the positioning plug-in rod 1 I-beam (height + 10) mm × (leg width + 10) mm;

[0053] The lifting lug 2-2 is cut from a common steel plate with a thickness of about 20 mm and welded between two positioning beams 2-3 and 2-4 at the four corners of the positioning frame 2. The central hole diameter of the lifting lug 2-2 is about 35 mm.

[0054] The frame legs 3 are four columnar components welded to the four corners of the bottom surface of the positioning frame 2, used to support and level the positioning frame 2, and are composed of a hollow sleeve 3-3, trapezoidal screws 3-1, 3-4, trapezoidal nuts 3-2, 3-5 and an iron pad 3-6;

[0055] The trapezoidal screws 3-1, 3-4, trapezoidal nuts 3-2, 3-5 are all standard parts. In order to achieve the purpose of rapid lifting and lowering of the frame legs 3, the upper and lower paired screws and nuts adopt different rotation directions, that is, when the upper part is a left-handed thread pair, the lower part should be a right-handed thread pair; by raising or lowering the four frame legs 3, the positioning frame 2 is adjusted to a horizontal state with the help of a level ruler;

[0056] The hollow sleeve 3-3 is made of seamless steel pipe, and the trapezoidal nuts 3-2 and 3-5 built into both ends are welded to the end faces of the hollow sleeve 3-3; at the vertical middle position of the outer wall of the hollow sleeve 3-3, 1 to 2 through holes with a diameter of about 30 mm for twisting the sleeve are drilled. When 2 through holes are provided, they should be perpendicular to each other and staggered up and down;

[0057] The iron backing plate 3-6 is welded to the lower end of the trapezoidal screw rod 3-4 and is a circular or square steel plate for expanding the contact surface to increase the stability during the grounding installation of the positioning jig.

[0058] The positioning plug rod 1, the positioning frame 2, and the hollow sleeve 3-3 are all made of section steel, and the section steel is not limited to I-beams and / or channel steels, round tubes and / or square tubes; the positioning frame 2 is set as a square frame structure for detailed structural description, and it can actually also be circular.

[0059] A positioning jig for installing a bored pile steel cage is characterized by including the following steps:

[0060] a) Operation preparation: Procure section steel, standard parts, etc. from the market and process the positioning jig using common machining equipment. For example: Use "I16" to process the positioning frame 2, the positioning cross beams 2-3, 2-4, and the stiffeners 2-1; use "I12" to process the positioning plug rod 1; use D89×4.5 seamless steel pipe to process the hollow sleeve 3-3; use δ16 steel plate to process the iron backing plate 3-6; customize and purchase M52×5 trapezoidal screw rods 3-1, 3-4, trapezoidal nut 3-2, 3-5 assemblies, etc. Prepare several square timbers for supporting the positioning frame 2; prepare several 1 cm thick hardwood blocks for vertical deviation correction of the steel cage; prepare several straight thread sleeves for connecting the steel cage during the shift.

[0061] b)就位调整:当钻孔桩孔深达到设计值并满足钢筋笼入孔安装时,平整孔口周边地面,利用吊车和吊耳2-2将定位框架2吊放至孔口钢护筒外面并尽量居中对齐安放,且彼此没有干涉;要求铁垫板3-6以下地面基本密实,否则在铁垫板3-6下加垫方木,确保定位框架2安放稳定;借助水平尺检查定位框架2顶面水平,利用空心套筒3-3通孔以钢撬棍或其他棒状物扭转空心套筒3-3使框架支腿3升高或降低,从而将定位框架2调整至水平状态;

[0062] c) The first section of the steel cage is hoisted and installed by adjusting the spatial position: the main reinforcement of the steel cage is fixed-length steel. For example, when the bored pile is designed to have a hole depth of 40m, the steel cage can be processed in sections of 4×10m and then transported to the construction site for connection and installation. When the steel cage is hoisted into the hole, it is lifted vertically by a crane. When the structural reinforcement at the tail of the first section of the steel cage is about 10cm away from the top surface of the positioning plug-in rod 1, the crane stops lowering the steel cage, and manually pushes the positioning plug-in rod 1 at the four corners of the positioning frame 2 into the steel cage for more than 10cm. The crane continues to lower the steel cage until the structural reinforcement contacts the positioning plug-in rod 1. Manually hold the steel cage to check and adjust the steel cage to be in the center relative to the steel casing, and confirm that the distance between the spiral reinforcement on the outside of the steel cage and the inner wall of the steel casing should be basically the same. Then, the crane completely releases the steel cage to allow the positioning plug-in rod 1 to bear the weight, and removes the hoist to hoist the second section of the steel cage.

[0063] d) The second section of the steel cage is in place and connected with the previous section of the steel cage by straight thread and installed: the second section of the steel cage is vertically transferred by the crane to the top of the first section of the steel cage, and when its lower end is about 1m away from the upper end of the first section, the crane reduces the moving speed of the steel cage, uses the wind rope to limit the swing of the second section of the steel cage and slowly approaches the upper end of the first section, compares the length sequence of the joints of the steel cage and the main bars, rotates the second section of the steel cage to make the main bars "long on top and short on bottom, short on bottom and long on top" correspond one by one, suspends the steel cage by the crane, manually removes the protective plastic cap on the roller-pressed straight thread of the main bar end of the steel cage, and uses the straight thread sleeve prepared in advance Connect one by one; after checking the torque of the straight thread sleeve and that all the main bars have been connected, the crane slowly lifts the two connected sections of the steel cage upwards again and hovers until the positioning plug-in rod 1 is no longer under force, and then pulls them out separately. The crane resumes lowering the second section of the steel cage into the hole until the tail structural reinforcement is close to the top surface of the positioning plug-in rod 1 again, hovers, inserts the positioning plug-in rod 1, checks and adjusts the steel cage to be centered and vertical relative to the steel casing, and makes the positioning plug-in rod 1 bear all the weight of the connected steel cage, waiting for the next section to be connected; repeat this until all the steel cages of the designed length in the same pile hole are hoisted into place and meet the design requirements.

[0064] e) Check the qualified installation of the steel cage and pour the bored pile concrete: When the steel cage is supported by the positioning plug-in rod 1 and has vertical deflection, considering the position deviation caused by the circumferential plane of the reinforcement of the steel cage structure not being perpendicular to the axis of the steel cage, a hard miscellaneous wood pad can be added to the top surface of one or two positioning plug-in rods 1 on the deflected side when the steel cage is lowered by a crane for centering and vertical adjustment. After confirming that the steel cage is centered relative to the steel casing and the verticality meets the requirements (0.1%), the bored pile concrete should be poured in time to ensure the quality of the reinforced concrete pile.

[0065] f) Repeat steps b) to e) to complete the installation and positioning of all bored pile reinforcement cages and bored pile concrete construction within the planned scope.

[0066] Compared with the prior art, the utility model has the following advantages:

[0067] 1. The utility model is mainly aimed at the fact that the relative position accuracy of the steel cage installation of the hole pile in the prior art is prone to deviation, which affects the thickness of the steel bar protective layer of the hole pile and the quality of the reinforced concrete pile, and the quality problems after the pile is formed are difficult to rectify and the cost increases exponentially. The positioning tire frame is novel and reasonable in design, simple in structure, and easy to use.

[0068] 2. The positioning rod, positioning frame and hollow sleeve are all made of steel, and the steel plate used for the iron pad is ordinary plate. The production materials are easy to obtain and the cost is low. The main processing steps are cutting and welding. It can be processed by yourself or outsourced. The trapezoidal screw and trapezoidal nut are standard parts, which can be processed by yourself or obtained from the hardware market.

[0069] 3. When the positioning frame is processed into a square, it has reinforcing ribs at the four corners, so the overall rigidity is better than that of a circular frame. Straight line components are easier to control and process. The installation and positioning of the four frame legs are simple and more conducive to overall force.

[0070] 4. The size of the positioning frame is manufactured according to the steel cage installation requirements corresponding to the largest hole pile diameter among several hole pile diameters designed for the same construction site. There is no need to make more frames with different hole diameters, and frequently replace steel cage installation frames of different sizes during construction, thereby improving the use efficiency of the same positioning frame and having better practicality.

[0071] 5. The positioning plug-in rod has a hole in the center of the web of the positioning beam to form a directional channel. The structure is simple, the positioning plug-in rod leg width and the contact surface with the web of the positioning beam are small, the plug-in resistance is small, and the hanging and releasing of the steel cage are simple and quick.

[0072] 6. By adjusting the horizontal state of the positioning frame through the forward and reverse screws of the frame legs, and adjusting the height of the accidental deviation of the steel cage in the vertical direction on the top of the positioning plug-in rod, the installation positioning of the bored pile steel cage can be accurately controlled to ensure that the steel cage is installed in the center of the pile hole and the verticality meets the requirements of the specifications.

[0073] In summary, the utility model has novel and reasonable design, simple structure, convenient operation, low implementation cost and is easy to promote and apply.

[0074] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A positioning frame for installing a pile reinforcement cage, characterized in that: The invention comprises three parts: a positioning plug-in rod (1), a positioning frame (2), and a frame leg (3); the positioning plug-in rod (1) is a stop hanging component for controlling the height and centering of the steel cage relative to the hole opening when the crane cooperates to lift the bored pile steel cage, and is located at the four corners of the positioning frame (2) and extends diagonally toward the center thereof. When the steel cage is lowered to a certain working position, the four corner positioning plug-in rods (1) can be simultaneously inserted under the structural reinforcement ribs on the horizontal plane of the steel cage circumference, and bear the weight of all the steel cages connected above and below; the positioning frame (2) is a type The square frame structure is made of steel, and two positioning beams (2-3, 2-4) for installing and fixing the positioning plug-in rod (1) are welded at the four corners of the upper top surface. The positioning beams (2-3, 2-4) are provided with fixing holes that match the cross section of the positioning plug-in rod (1) at the diagonal position of the square frame. The positioning plug-in rod (1) is inserted into the fixing holes and can move forward and backward along the diagonal of the square frame to realize the suspension positioning of the steel cage. The frame legs (3) are columnar components welded to the four corners of the bottom surface of the positioning frame (2) and are used to support and level the positioning frame (2).

2. A hole pile reinforcement cage installation positioning frame according to claim 1, characterized in that: The positioning plug-in rod (1) is made of steel and is installed and fixed in a fixing hole opened on the positioning beam (2-3, 2-4) along the diagonal position of the square frame. The outer end thereof is welded and fixed with a handle (1-1) for pushing and pulling the positioning plug-in rod (1), and the inner end thereof is chamfered at about 1:20 along the length direction of both sides of the leg width. During operation, the relative height deviation of the top surfaces of the four positioning plug-in rods (1) is ≤1 cm. When the steel cage is lowered to a certain working position, the crane stops lowering the steel cage. By pushing and pulling each handle (1-1), the four positioning plug-in rods (1) can be inserted into the lower part of the structural reinforcement rib on the horizontal surface of the inner circumference of the steel cage along the diagonal direction of the square frame. The crane continues to lower the steel cage, and the steel cage is suspended on the positioning plug-in rod (1); The steel specifications of the positioning plug-in rod (1) are 1 to 2 sizes smaller than those of the positioning crossbeams (2-3, 2-4). For example, when the positioning crossbeams (2-3, 2-4) use "G16", the positioning plug-in rod (1) can use "G14" or "G12". The length can be suitable for the steel cage suspension with a smaller hole diameter. For example, when the diameter of the hole pile is 1.0m, the total length of the positioning plug-in rod (1) can be determined to be 1.1m. At this time, it can still be used for the steel cage suspension with a larger diameter. The handle (1-1) is a rod-shaped or ring-shaped member, not limited to steel bars or pipes, and can meet the plug-in and pull-out force requirements and facilitate operation and gripping habits, such as: Pipe, or When the threaded steel bar is coiled into a ring, it can also be pulled by inserting a wooden stick.

3. A hole pile reinforcement cage installation positioning frame according to claim 1, characterized in that: The positioning frame (2) is welded with steel sections of the same specification as the positioning cross beams (2-3, 2-4), and its size is determined by the diameter of the pile hole and the diameter of the steel casing at the hole. When the same construction site is designed with several pile hole diameters and the difference is not large, the positioning frame (2) can be manufactured according to the steel cage installation requirements that meet the maximum pile hole diameter. At the same time, the outer diameter of the steel casing at the hole must be calculated. For example, if a certain project is designed with three types of pile hole diameters of 1.0m, 1.25m, and 1.5m, the maximum pile hole diameter can be calculated. + The diameter of the steel casing at the hole is enlarged by 0.5 to 0.6 m”, and the size of the positioning frame (2) is determined to be a 2.5×2.5 m square. This positioning frame is suitable for the installation of steel cages with the above three hole diameters; The positioning beams (2-3, 2-4) have two inner and outer positioning beams, the inner edge of the inner positioning beam (2-4) having a wide leg is tangent to the inscribed circle of the square positioning frame (2), and the outer positioning beam (2-3) and the inner positioning beam (2-4) are parallel and spaced about 30 cm apart; in order to ensure that the positioning frame (2) is torsion-resistant and has sufficient rigidity, a steel reinforcement rib (2-1) of the same specification is welded in the inner cavity of the positioning frame (2) corresponding to the lower portion of the inner positioning beam (2-4); The center of the web of the I-beam of the positioning crossbeam (2-3, 2-4) is provided with an opening, the size of the opening is determined by the size of the positioning plug-in rod (1) and a certain width increase, so that when the positioning plug-in rod (1) is inserted perpendicular to the web plane, a directional channel is formed that can move forward and backward along the diagonal of the square frame. Therefore, the size of the positioning crossbeam (2-3, 2-4) steel must be larger than the size of the positioning plug-in rod (1) steel, and the size of the opening is as follows: the I-beam of the positioning plug-in rod (1) (height + 10) mm × (leg width + 10) mm; The lifting lugs (2-2) are cut from common steel plates and welded between two positioning crossbeams (2-3, 2-4) at the four corners of the positioning frame (2).

4. A hole pile reinforcement cage installation positioning frame according to claim 1, characterized in that: The frame legs (3) are four columnar components welded to the four corners of the bottom surface of the positioning frame (2), used to support and level the positioning frame (2), and are composed of a hollow sleeve (3-3) with trapezoidal nuts (3-2, 3-5) built in at both ends, and a trapezoidal screw (3-1, 3-4) and an iron pad (3-6) used in pair with the trapezoidal nuts (3-2, 3-5); The trapezoidal screws (3-1, 3-4) and the trapezoidal nuts (3-2, 3-5) are all standard parts, and when the trapezoidal nuts (3-2, 3-5) are made into flange shapes, it is beneficial to screw guide, improve strength and enhance stability. However, the screws and nuts paired up at the top and bottom have different thread directions, that is, when the upper part is a left-handed thread pair, the lower part should be a right-handed thread pair, thereby forming an effect of quickly raising and lowering the frame legs (3) by rotating the hollow sleeve (3-3); by raising or lowering the four frame legs (3), the positioning frame (2) is adjusted to a horizontal state with the help of a level ruler, thereby achieving the purpose of controlling the steel cage to be in a plumb state; The hollow sleeve (3-3) is made of a seamless steel pipe, and the trapezoidal nuts (3-2, 3-5) built into the two ends are welded to the two end surfaces of the hollow sleeve (3-3); the outer wall of the hollow sleeve (3-3) at the vertical middle position is drilled with 1 to 2 through holes with a diameter of about 30 mm for the sleeve to be twisted, and when two through holes are provided, their axes are preferably perpendicular to each other and to the axis of the hollow sleeve (3-3), and are preferably offset up and down by a spacing of 1 hole diameter; The iron pad (3-6) is welded to the lower end of the trapezoidal screw (3-4) and is a round or square steel plate that expands the contact surface to increase the stability of the positioning tire frame when it is grounded and installed.

5. A hole pile reinforcement cage installation positioning frame according to claim 1, characterized in that: The positioning plug-in rod (1), the positioning frame (2), and the hollow sleeve (3-3) are all made of steel sections, and the steel sections are not limited to I-beams and / or channel steels, round tubes and / or square tubes; the positioning frame (2) is set to a square frame structure or a circular structure for a detailed structural description.

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