CN113718655B - Steel reinforcement cage hanging and positioning device and free hanging and positioning method - Google Patents
Steel reinforcement cage hanging and positioning device and free hanging and positioning method Download PDFInfo
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- CN113718655B CN113718655B CN202111025280.8A CN202111025280A CN113718655B CN 113718655 B CN113718655 B CN 113718655B CN 202111025280 A CN202111025280 A CN 202111025280A CN 113718655 B CN113718655 B CN 113718655B
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D13/00—Accessories for placing or removing piles or bulkheads, e.g. noise attenuating chambers
- E02D13/04—Guide devices; Guide frames
Abstract
The invention provides a steel reinforcement cage hanging and positioning device which comprises a positioning base, a positioning rod, a knob device, a pull rod and a borer, wherein the positioning base is provided with a positioning hole; the positioning base is an annular base; the positioning rod is arranged at the central position of the annular base; the knob device is arranged on the upper surface of the annular base and is provided with a plurality of knob devices; each knob device is respectively provided with a knob screw rod and a clamping circular arc plate which face the center of the annular base; the knob device is matched with the clamping arc plate through a knob screw rod to clamp and release the positioning rod; the pull rod is arranged above the annular base and sequentially connects the top ends of the knob devices; the drill is arranged on the lower surface of the annular base and used for drilling downwards. The invention also provides a free hanging positioning method. The invention has the advantages that: not only can the accurate positioning of the free hanging of the reinforcement cage be realized, the reinforcement cage is always vertical to the surface of the pit foundation, but also the working efficiency of the hanging is improved; meanwhile, the stability and the reliability of the positioning of the reinforcement cage can be ensured.
Description
Technical Field
The invention relates to the technical field of highway bridge construction, in particular to a steel reinforcement cage hanging and positioning device and a free hanging and positioning method.
Background
The steel reinforcement cage is generally applied to the field of highway bridge construction. Because the steel reinforcement cage has stronger stability and reliability, and concrete is poured in the steel reinforcement cage, better bearing capacity and shearing force can be achieved.
At present, although the reinforcement cage is used as a 'skeleton' in the construction of road bridges, the reinforcement cage is difficult to be actually installed and positioned. This is mainly because the reinforcement cage is usually manufactured in a reinforcement prefabrication plant and then suspended into a prefabricated pit foundation by a crane, a trailer and special hoisting equipment. At present, lift by crane the steel reinforcement cage to the in-process of hole base, owing to lack accurate location, lead to the steel reinforcement cage to accomplish the pre-buried in the hole base betterly, according to this, the steel reinforcement cage that will lead to burying is out of plumb with ground, has the slope. The steel reinforcement cage can not accurately reach a preset position, so that the deviation of the concrete pier of the bridge from the actual position can be caused, and the safety of the bridge body and the attractiveness of the appearance of the bridge are seriously influenced.
At present, although some steel reinforcement cage free hanging methods exist, the methods are more traditional, the working efficiency is low, and the defect that the steel reinforcement cage free hanging positioning error is large exists. Therefore, how to realize the accurate positioning of the free hanging of the reinforcement cage is one of the problems to be solved urgently in the technical field of the current highway bridge construction.
Disclosure of Invention
The invention aims to solve the technical problem of providing a steel reinforcement cage hanging and positioning device and a free hanging and positioning method; the hanging positioning device is used for hanging the reinforcement cage, so that not only can the accurate positioning of free hanging of the reinforcement cage be realized, and the reinforcement cage is always vertical to the surface of the pit foundation, but also the hanging working efficiency is improved; meanwhile, the device and the method can also ensure the stability and the reliability of the positioning of the reinforcement cage.
The invention adopts the following technical scheme to solve the technical problems:
a steel reinforcement cage hanging and positioning device comprises:
the positioning base is an annular base;
the positioning rod is vertically arranged at the center of the annular base;
the knob devices are arranged on the upper surface of the annular base and are provided in plurality; each knob device is provided with a knob screw rod and a clamping circular arc plate which face the center of the annular base respectively; the knob device is used for clamping and releasing the positioning rod through the matching of the knob screw rod and the clamping circular arc plate;
the pull rod is arranged above the annular base and sequentially connects the top ends of the knob devices;
a reamer disposed on a lower surface of the annular base for drilling downwardly.
In a preferred embodiment of the present invention, the positioning rod is formed by extending downward from above the annular base; and the bottommost end of the positioning rod extends to the lower part of the annular base and is connected with a pointed structure.
As one preferable mode of the present invention, four knob devices are provided; the four knob devices are symmetrically arranged on the annular base in pairs, and clamping circular arc plates of the four knob devices point to the positioning rod together; the four clamping arc plates are respectively matched with the periphery of the positioning rod to jointly form a complete positioning rod clamping assembly.
As one of the preferable modes of the present invention, each of the knob devices respectively includes a positioning column, a connecting rod, an adjusting rod, a fixing sleeve, a supporting rod, a knob supporting rod, and the knob screw and the clamping arc plate; the positioning upright column is vertically arranged on the upper surface of the annular base, and the column body of the positioning upright column is connected with the connecting rod; one end of the connecting rod is fixedly connected with the positioning upright post, the other end of the connecting rod transversely extends towards the center of the annular base, and the extending tail end of the connecting rod is hinged with the knob supporting rod; the bottom end of the knob supporting rod is hinged with the connecting rod, and the upper end of the knob supporting rod is connected with the knob screw rod through a shaft sleeve; the rod body of the knob screw rod is sleeved in the shaft sleeve and is in threaded connection with the shaft sleeve, and meanwhile, one end, close to the center of the annular base, of the knob screw rod is connected with the clamping circular arc plate; in addition, the rod body of the connecting rod is also provided with the adjusting rod, and the column body of the positioning upright column is sleeved with the fixed sleeve; one end of the adjusting rod is hinged with the connecting rod, and the other end of the adjusting rod is fixedly connected with the outer surface of the fixing sleeve; meanwhile, the support rod is fixedly connected between the adjusting rod and the knob support rod.
As one of the preferable modes of the present invention, the positioning column is fixed on the upper surface of the annular base by bolts, and an upper connecting rod and a lower connecting rod are fixed on a column body of the positioning column by bolts; one end of each of the two connecting rods is fixed at a corresponding position of the positioning upright column, and the other end of each of the two connecting rods is movably hinged with one knob supporting rod through a bolt; the bottom end of the knob support rod is hinged with the corresponding connecting rod, the upper ends of the knob support rod are respectively welded and fixed with a shaft sleeve, and the shaft sleeves are in threaded connection with the knob screw; the clamping circular arc plate is movably connected to one end, close to the center of the annular base, of the knob screw rod, and the clamping circular arc plate is used for clamping the positioning rod;
in addition, a fixed sleeve is respectively connected to the upper position of each connecting rod on the positioning upright post in a sleeved mode, and the rod body of each connecting rod is respectively connected with one adjusting rod in a hinged mode through a bolt; one end of the adjusting rod is in limit hinge connection with the connecting rod through a bolt, and the other end of the adjusting rod is welded and fixed with the outer surface of the fixing sleeve; meanwhile, one support rod is fixedly connected between the adjusting rod and the knob support rod in a welding mode.
As one preferable mode of the present invention, the fixing sleeve is slidably connected to the positioning column, and is slidably limited between the pull rod and two corresponding bolts on the positioning column.
As one preferable mode of the invention, one end of each knob screw rod, which is far away from the center of the annular base, is also provided with a rotary operating handle respectively; under the rotating action of the rotary operating handle, the knob screw drives the clamping circular arc plate to be close to or far away from the central position of the annular base so as to clamp or release the positioning rod.
As one preferable mode of the present invention, the clamping circular arc plate is located at one end of the knob screw and is movably and rotatably connected to one end of the knob screw.
As one of the preferable modes of the invention, the number of the pull rods is the same as that of the knob devices, and the pull rods are connected with the knob devices in a sleeve manner;
the drilling devices are three and are fixedly installed on the annular base through bolts.
A free hanging and positioning method of a reinforcement cage adopts the reinforcement cage hanging and positioning device; the free hanging and positioning method of the reinforcement cage specifically comprises the following steps:
s1, arranging and filling a hanging field:
removing soft soil and sundries, leveling the field, and ramming tightly to ensure that the foundation pit platform is 15-25 cm higher than the ground; the diameter of the finished operation platform is 1.5 to 1.7 times of that of the reinforcement cage;
s2, pre-positioning before hanging:
placing a steel reinforcement cage hanging and positioning device on a finished field, wherein a positioning rod points to a geometric center position of a preset embedded steel reinforcement cage, and the lower end of the positioning rod enters a finished operation platform to be 10-20 cm deep;
starting a three-station drilling device on the steel reinforcement cage hanging and positioning device, and deeply drilling three fixed foundation pits downwards on the finished operation platform, wherein the diameter of each fixed foundation pit is D;
s3, drilling a geometric center hole of the reinforcement cage and pouring concrete in the fixed foundation pit:
moving away the steel reinforcement cage hanging and positioning device in the step S2 (moving to the next positioning point, and circulating the positioning point), and drilling a geometric center hole of the steel reinforcement cage by using a rotary drilling machine; then, pouring concrete into the fixed foundation pit until the diameter of the fixed foundation pit calculated in the step S2 is reached;
s4, resetting the hanging positioning device:
resetting the steel reinforcement cage hanging and positioning device, placing the drilling devices of the device in corresponding fixed foundation pits, and then checking whether the positioning rod is positioned in the geometric center of the steel reinforcement cage; after the positioning rod is checked and confirmed to be positioned at the geometric center of the steel reinforcement cage, the diameter enclosed by each clamping circular arc plate is adjusted to be in a state of being slightly larger than the diameter of the steel reinforcement cage by rotating and twisting each knob screw rod on the steel reinforcement cage hanging and positioning device; finally, the positioning rod is detached from the steel reinforcement cage hanging and positioning device;
s5, freely hanging the reinforcement cage:
vertically hoisting a prefabricated reinforcement cage by a crane, and dragging the reinforcement cage into a reinforcement cage hoisting and positioning device; then, respectively screwing each knob device on the steel reinforcement cage hanging and positioning device tightly, so that each clamping arc plate is tightly clamped around the steel reinforcement cage; after concrete is poured into the reinforcement cage, the reinforcement cage hanging and positioning device is disassembled, and free hanging of the reinforcement cage is achieved.
As one preferable embodiment of the present invention, in the step S2, the diameter D of the fixed foundation pit is calculated by the following formula:
the formula holds:
wherein G represents the weight of the reinforcement cage; d, fixing the diameter of the foundation pit; mu-coefficient of friction between the fixed foundation pit and the three-station drilling machine; delta h-fixing the depth of the foundation pit; a-fixing the sectional area of the foundation pit; [ sigma ] -allowable shear force; sigma-shear force.
Compared with the prior art, the invention has the advantages that:
(1) The geometric center of the reinforcement cage is positioned by the reinforcement cage hanging and positioning device, and the positioning position of the reinforcement cage is accurate and is not easy to deviate;
(2) The steel reinforcement cage hanging and positioning device is adopted to realize free hanging of the steel reinforcement cage, the knob in the hanging and positioning device firmly clamps the steel reinforcement cage, the steel reinforcement cage can be always vertical to a finished working platform, the hanging and positioning are easy to realize, and the working efficiency is improved;
(3) The knob devices in the steel reinforcement cage hanging and positioning device are symmetrically arranged in an upper row and a lower row, and two points are in a one-line butt clamping mode, so that the steel reinforcement cage is firmly clamped; meanwhile, the three-station drilling device further realizes the stability and reliability of free hanging of the reinforcement cage by adopting the principle of controlling one surface at three points;
(4) In the knob device structure, one end of a connecting rod is fixedly connected with a positioning upright post, the other end of the connecting rod is hinged with a knob supporting rod, the knob supporting rod is connected with a knob screw rod, meanwhile, one end of an adjusting rod is hinged with the connecting rod, and the other end of the adjusting rod is fixedly connected with a fixed sleeve; based on the structure, in the process of hanging the reinforcement cage, when the reinforcement cage is impacted, the clamping arc plate is affected, and at the moment, the fixed sleeve is driven by the adjusting rod to slide up and down along the column body of the positioning upright column by a small amplitude so as to buffer the influence of impact force on the device; meanwhile, the transverse stress of the clamping circular arc plate and the reinforcement cage cannot change, and the reinforcement cage can still be kept stable;
(5) The steel reinforcement cage hanging and positioning device is simple to manufacture and low in manufacturing cost.
Drawings
FIG. 1 is a schematic view of the overall structure of a steel reinforcement cage hanging and positioning device in embodiment 1;
fig. 2 is a schematic structural view of a single rotary knob in embodiment 1.
In the figure: 1 is the location base, 11 is annular base, 2 is the locating lever, 21 is the prong structure, 3 is the knob ware, 31 is the location stand, 32 is the connecting rod, 33 is the regulation pole, 34 is fixed cover, 35 is the bracing piece, 36 is the knob bracing piece, 361 is the axle sleeve, 37 is the knob screw rod, 371 is the rotation operation handle, 38 is the centre gripping circular arc board, 4 is the pull rod, 5 is the perforator.
Detailed Description
The following examples are given for the detailed implementation and specific operation of the present invention, but the scope of the present invention is not limited to the following examples.
Example 1
As shown in fig. 1-2, the positioning device for hanging a reinforcement cage of the present embodiment includes a positioning base 1, a positioning rod 2, a knob 3, a pull rod 4 and a drilling device 5. The positioning base 1 is a ring-shaped base 11. The positioning rod 2 is vertically arranged at the center position of the annular base 11. The knob device 3 is arranged on the upper surface of the annular base 11 and is provided with a plurality of knob devices; each knob device 3 is respectively provided with a knob screw 37 and a clamping circular arc plate 38 which face the center of the annular base 11; the knob device 3 clamps and releases the positioning rod through the matching of the knob screw 37 and the clamping circular arc plate 38. The pull rod 4 is arranged above the annular base 11 and connects the top end of each knob device 3 in turn. The drill 5 is provided on the lower surface of the ring base 11 for drilling downward.
Specifically, in the present embodiment, the positioning rod 2 is formed by extending downward from the upper side of the annular base 11; the bottom end of the positioning rod 2 extends to the lower part of the annular base 11 and is connected with a pointed structure 21.
Specifically, in the present embodiment, four knob devices 3 are provided; the four knob devices 3 are symmetrically arranged on the annular base 11 in pairs, and the clamping circular arc plates 38 of the four knob devices 3 point to the positioning rod 2 together. The four clamping arc plates 38 are respectively matched with the periphery of the positioning rod 2 to form a complete positioning rod clamp assembly.
Further, each knob device 3 includes a positioning column 31, a connecting rod 32, an adjusting rod 33, a fixing sleeve 34, a supporting rod 35, a knob supporting rod 36, and the knob screw 37 and the clamping circular arc plate 38.
Wherein, the positioning column 31 is vertically arranged on the upper surface of the annular base 11 through a bolt, and the column body of the positioning column 31 is fixedly provided with an upper connecting rod 32 and a lower connecting rod 32 through bolts. One end of each of the two connecting rods 32 is fixed at a corresponding position of the positioning column 31, and the other end extends transversely to the center of the annular base 11, and is hinged to a knob support rod 36 at the extending end thereof. Further, the bottom end of the knob support rod 36 is hinged with the corresponding connecting rod 32, and the upper ends thereof are respectively welded and fixed with a shaft sleeve 361; the shaft body of the knob screw 37 is sleeved in the shaft sleeve 361 and is in threaded connection with the shaft sleeve 361, meanwhile, one end of the knob screw 37, which is close to the center of the annular base 11, is movably connected with a clamping circular arc plate 38, and the clamping circular arc plate 38 is movably and rotatably connected with the knob screw 37.
In addition, a fixing sleeve 34 is sleeved and connected above each connecting rod 32 on the positioning upright column 31, and a regulating rod 33 is hinged and connected to the shaft of each connecting rod 32 through a bolt. One end of the adjusting rod 33 is in limit hinge connection with the connecting rod 32 through a bolt, and the other end of the adjusting rod is welded and fixed with the outer surface of the fixing sleeve 34; meanwhile, a support rod 35 is fixedly connected between the adjusting rod 33 and the knob support rod 36 by welding. The fixing sleeve 34 is connected with the positioning column 31 in a sliding manner, and the sliding is limited between the pull rod 4 and the two corresponding bolts on the positioning column 31.
Specifically, in the present embodiment, the number of the pull rods 4 is the same as that of the knob device 3, and the pull rods 4 are connected to the top end of the positioning column 31 of the knob device 3 in a sleeve manner;
specifically, in the present embodiment, three drills 5 are provided and fixed to the annular base 11 by bolt mounting, and the three-position drill 5 is constituted.
In addition, it should be noted that, for convenience of operation, a rotation operation knob 371 is further provided on each knob screw 37 at an end away from the center of the annular base 11. In use, under the rotation action of the rotary operation handle 371, the knob screw 37 drives the clamping arc plate 38 to approach or leave the central position of the annular base 11, so as to clamp or release the positioning rod 2.
Example 2
The freely hanging and positioning method of the reinforcement cage of the embodiment is carried out by adopting the freely hanging and positioning device of the reinforcement cage in the embodiment 1, and specifically comprises the following steps:
s1, hanging a site, arranging and filling an operation platform:
removing soft soil and sundries, leveling the field, and ramming tightly to ensure that the foundation pit platform is 15-25 cm higher than the ground; the diameter of the finished operation platform is 1.5 to 1.7 times of that of the reinforcement cage;
s2, pre-positioning before hanging:
placing a steel reinforcement cage hanging and positioning device on a finished field, wherein a positioning rod 2 points to a geometric center position of a preset embedded steel reinforcement cage, and the lower end of the positioning rod 2 enters a finished operation platform to be 10-20 cm deep;
starting a three-station drilling device 5 on the steel reinforcement cage hanging and positioning device, and deeply drilling three fixed foundation pits downwards on the finished operation platform, wherein the diameter of each fixed foundation pit is D;
s3, drilling a geometric center hole of the reinforcement cage and pouring concrete in the fixed foundation pit:
moving the steel reinforcement cage hanging and positioning device in the step S2 away (moving to the next positioning point, and circulating the positioning point), and drilling a geometric center hole of the steel reinforcement cage by using a rotary drilling machine; then, pouring concrete into the fixed foundation pit until the diameter of the fixed foundation pit calculated in the step S2 is reached;
s4, resetting the hanging positioning device:
resetting the steel reinforcement cage hanging and positioning device, arranging the drilling devices 5 of the device in corresponding fixed foundation pits, and then checking whether the positioning rod 2 is positioned at the geometric center of the steel reinforcement cage; after checking and confirming that the positioning rod 2 is indeed positioned at the geometric center of the steel reinforcement cage, the diameter enclosed by each clamping circular arc plate 38 is adjusted to be in a state of slightly larger than the diameter of the steel reinforcement cage by rotating and twisting each knob screw 37 on the steel reinforcement cage hanging and positioning device; finally, the positioning rod 2 is detached from the steel reinforcement cage hanging and positioning device;
s5, freely hanging the reinforcement cage:
vertically hoisting a prefabricated reinforcement cage by a crane, and dragging the reinforcement cage into a reinforcement cage hoisting and positioning device; then, respectively screwing each knob device 3 on the steel reinforcement cage hanging and positioning device tightly, so that each clamping arc plate 38 is tightly clamped around the steel reinforcement cage; after concrete is poured into the steel reinforcement cage, the steel reinforcement cage hanging and positioning device is disassembled, and then free hanging of the steel reinforcement cage is achieved.
In the step S2, the diameter D of the fixed foundation pit is calculated by the following formula:
the formula holds:
wherein G represents the weight of the reinforcement cage; d, fixing the diameter of the foundation pit; mu-coefficient of friction between the fixed foundation pit and the three-station drilling machine; delta h-fixing the depth of the foundation pit; a-fixing the sectional area of the foundation pit; [ sigma ] -allowable shear force; sigma-shear forces.
On the construction project site, the steel reinforcement cage manual hanging and positioning, the crane free hanging and positioning and the steel reinforcement cage hanging constructed by the free hanging method are respectively selected from 5 hanging steel reinforcement cages, and the data obtained by comparing the hanging efficiency, the verticality with the foundation pit and the positioning accuracy of the steel reinforcement cage are shown in the table 1.
TABLE 1 data comparison of three hanging methods
| Hanging method | Efficiency of hanging | Perpendicularity with foundation pit | Positioning accuracy of reinforcement cage |
| Manual hanging location | Low (low) | With deflection | Has large error |
| Free hanging location for crane | Is higher than | With deflection | Has large error |
| The invention can be freely hung and positioned | Is higher than | Is perpendicular to | The error is small |
As can be seen from the evaluation results in Table 1, the free-hanging positioning method of the present invention is optimal.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. The utility model provides a positioner is hung to steel reinforcement cage which characterized in that includes:
the positioning base is an annular base;
the positioning rod is vertically arranged at the center of the annular base;
the knob devices are arranged on the upper surface of the annular base and are provided in plurality; each knob device is provided with a knob screw rod and a clamping circular arc plate which face the center of the annular base respectively; the knob device is matched with the clamping circular arc plate through the knob screw rod to clamp and release the positioning rod;
the pull rod is arranged above the annular base and sequentially connects the top ends of the knob devices;
the borer is arranged on the lower surface of the annular base and used for drilling downwards;
each knob device comprises a positioning upright post, a connecting rod, an adjusting rod, a fixing sleeve, a supporting rod, a knob screw and a clamping circular arc plate; the positioning upright column is vertically arranged on the upper surface of the annular base, and the column body of the positioning upright column is connected with the connecting rod; one end of the connecting rod is fixedly connected with the positioning upright post, the other end of the connecting rod transversely extends towards the direction of the central position of the annular base, and the extending tail end of the connecting rod is hinged with the knob supporting rod; the bottom end of the knob support rod is hinged with the connecting rod, and the upper end of the knob support rod is connected with the knob screw rod through a shaft sleeve; the rod body of the knob screw rod is sleeved in the shaft sleeve and is in threaded connection with the shaft sleeve, and meanwhile, one end, close to the center of the annular base, of the knob screw rod is connected with the clamping arc plate; in addition, the rod body of the connecting rod is also provided with the adjusting rod, and the column body of the positioning upright column is sleeved with the fixed sleeve; one end of the adjusting rod is hinged with the connecting rod, and the other end of the adjusting rod is fixedly connected with the outer surface of the fixing sleeve; meanwhile, the support rod is fixedly connected between the adjusting rod and the knob support rod.
2. The steel reinforcement cage hanging and positioning device according to claim 1, wherein the positioning rod extends and forms downwards from the upper part of the annular base; and the bottommost end of the positioning rod extends to the lower part of the annular base and is connected with a pointed structure.
3. The rebar cage hanger positioner of claim 1, wherein there are four knob devices; the four knob devices are symmetrically arranged on the annular base in pairs, and clamping circular arc plates of the four knob devices point to the positioning rod together; the four clamping arc plates are respectively matched with the periphery of the positioning rod to form a complete positioning rod clamping assembly.
4. The steel reinforcement cage hanging and positioning device according to claim 1, wherein the positioning upright post is fixed on the upper surface of the annular base through a bolt, and an upper connecting rod and a lower connecting rod are fixed on a post body of the positioning upright post through a bolt; one end of each of the two connecting rods is fixed at a corresponding position of the positioning upright column, and the other end of each of the two connecting rods is movably hinged with one knob supporting rod through a bolt; the bottom end of the knob support rod is hinged with the corresponding connecting rod, the upper ends of the knob support rod are respectively welded and fixed with a shaft sleeve, and the shaft sleeves are in threaded connection with the knob screw; the clamping circular arc plate is movably connected to one end, close to the center of the annular base, of the knob screw rod, and the clamping circular arc plate is used for clamping the positioning rod;
in addition, a fixed sleeve is respectively connected to the upper position of each connecting rod on the positioning upright post in a sleeved mode, and the rod body of each connecting rod is respectively connected with one adjusting rod in a hinged mode through a bolt; one end of the adjusting rod is in limit hinge connection with the connecting rod through a bolt, and the other end of the adjusting rod is welded and fixed with the outer surface of the fixing sleeve; meanwhile, one support rod is fixedly connected between the adjusting rod and the knob support rod in a welding mode.
5. The device as claimed in claim 4, wherein the fixing sheath is slidably connected to the positioning post, and is slidably retained between the two bolts of the pull rod and the positioning post.
6. The steel reinforcement cage hanging and positioning device according to claim 4, wherein a rotary operating handle is further arranged at one end of each knob screw, which is far away from the center of the annular base; under the rotation action of the rotary operation handle, the knob screw drives the clamping circular arc plate to be close to or far away from the central position of the annular base so as to clamp or release the positioning rod.
7. The steel reinforcement cage hanging and positioning device according to claim 4, wherein the clamping circular arc plate is located at one end of the knob screw and is movably and rotatably connected with one end of the knob screw.
8. The steel reinforcement cage hanging and positioning device according to claim 1, wherein the number of the pull rods is the same as that of the knob devices, and the pull rods are connected with the knob devices in a sleeve manner;
the drilling devices are three and are fixedly installed on the annular base through bolts.
9. A free hanging and positioning method for a reinforcement cage is characterized in that the reinforcement cage hanging and positioning device as claimed in any one of claims 1 to 8 is adopted; the free hanging and positioning method of the reinforcement cage specifically comprises the following steps:
s1, hanging a site, arranging and filling an operation platform:
removing soft soil and sundries, leveling the field, and ramming tightly to ensure that the foundation pit platform is 15-25 cm higher than the ground; the diameter of the finished operation platform is 1.5-1.7 times of that of the reinforcement cage;
s2, pre-positioning before hanging:
placing a steel reinforcement cage hanging and positioning device on a finished field, wherein a positioning rod points to a geometric center position of a preset embedded steel reinforcement cage, and the lower end of the positioning rod enters a finished operation platform to a depth of 10-20 cm;
starting a drilling device on the steel reinforcement cage hanging and positioning device, and deeply drilling three fixed foundation pits downwards on the finished operation platform, wherein the diameter of each fixed foundation pit is D;
s3, drilling a geometric center hole of the reinforcement cage and pouring concrete in the fixed foundation pit:
moving away the steel reinforcement cage hanging and positioning device in the step S2, and drilling a geometric center hole of the steel reinforcement cage by using a rotary drilling machine; then, pouring concrete into the fixed foundation pit until the diameter of the fixed foundation pit calculated in the step S2 is reached;
s4, resetting the hanging positioning device:
resetting the steel reinforcement cage hanging and positioning device, arranging the drilling devices of the device in corresponding fixed foundation pits, and then checking whether the positioning rod is positioned at the geometric center of the steel reinforcement cage; after the positioning rod is checked and confirmed to be positioned at the geometric center of the steel reinforcement cage, the diameter enclosed by each clamping circular arc plate is adjusted to be in a state of being slightly larger than the diameter of the steel reinforcement cage by rotating and twisting each knob screw rod on the steel reinforcement cage hanging and positioning device; finally, the positioning rod is detached from the steel reinforcement cage hanging and positioning device;
s5, freely hanging the reinforcement cage:
vertically hoisting a prefabricated reinforcement cage by a crane, and dragging the reinforcement cage into a reinforcement cage hoisting and positioning device; then, respectively screwing each knob device on the steel reinforcement cage hanging and positioning device tightly, so that each clamping arc plate is tightly clamped around the steel reinforcement cage; after concrete is poured into the reinforcement cage, the reinforcement cage hanging and positioning device is disassembled, and free hanging of the reinforcement cage is achieved.
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| CN210263111U (en) * | 2019-06-14 | 2020-04-07 | 王广军 | Hollow pile body for civil engineering construction |
| CN210766774U (en) * | 2019-06-27 | 2020-06-16 | 云南建投第六建设有限公司 | Positioning device for steel reinforcement cage and lattice column |
| CN210288430U (en) * | 2019-07-09 | 2020-04-10 | 广东厚普建设工程有限公司 | Protect a section of thick bamboo center and central positioner of stake position |
| CN211898338U (en) * | 2020-02-06 | 2020-11-10 | 中国能源建设集团西北电力建设工程有限公司 | Device for preventing bored concrete pile steel reinforcement cage come-up |
| CN112459073A (en) * | 2020-11-17 | 2021-03-09 | 中国一冶集团有限公司 | Anti-alignment offset mechanism for installing pile foundation engineering reinforcement cage for building |
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