Improvement method of cast-in-place pile reinforcement cage

Abstract

The invention discloses an improvement method for a cast-in-place pile reinforcement cage. The improvement method comprises the steps that firstly, main reinforcements are machined and connected; step 2, processing the erection ribs; thirdly, main reinforcements and erecting reinforcements are installed, the positions of the main reinforcements are marked on the erecting reinforcements, the main reinforcements are placed on a flat working platform, and the positions of the erecting reinforcements are marked on the main reinforcements; and fourthly, stirrups are installed. According to the improvement method of the cast-in-place pile reinforcement cage, marks are arranged on the main reinforcements and the erection reinforcements, and the main reinforcement spacing deviation and the reinforcement cage diameter deviation are effectively controlled. By transforming the main reinforcements, the space between the spiral stirrups can be effectively controlled, lateral constraint is generated on the spiral stirrups, and displacement of the spiral stirrups is reduced. Meanwhile, a traditional method of arranging protection ribs for guaranteeing the thickness of a protection layer is replaced, the thickness of the reinforcement protection layer can be effectively guaranteed, and the durability of the cast-in-place pile is improved. The reinforcing ribs are additionally arranged at the lifting points, so that the rigidity of the lifting points can be improved, the steel reinforcement cage is prevented from falling off in the lifting process, and the safety in the lifting process of the steel reinforcement cage is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of deep foundation and deep foundation pit support, and more specifically, to an improved method for a cast-in-place pile reinforcement cage. Background Art

[0002] With the rapid development of my country's economy, the scale of urban construction has been continuously expanded, and the height of buildings has been continuously increased. The development and utilization of underground space and the improvement of foundation bearing capacity have become the only way for urban sustainable development and the improvement of urban functions. Urban construction generally faces the problem of deep foundation pit support and deep foundation. In the field of foundation pit support, cast-in-place piles have the advantages of good support effect, short construction period, small construction space, strong lateral force resistance, and can also control groundwater together with curtain piles. They are widely used in deep foundation pit support. In the field of deep foundation, pile foundation can withstand large loads, reduce uneven settlement of buildings, and have good seismic performance. It is a common form of deep foundation, and cast-in-place piles are a common form of foundation piles in pile foundations. However, as an important component of cast-in-place piles, steel cages often have problems such as inaccurate hoop positioning, easy deformation during pouring, easy falling off during hoisting, and difficult to ensure the thickness of steel bar protective layer during construction, which greatly affects the safety of cast-in-place pile construction and the durability of use. Therefore, it is necessary to propose an improved method for cast-in-place pile steel cages to at least partially solve the problems existing in the prior art. Summary of the invention

[0003] A series of simplified concepts are introduced in the Summary of the Invention, which will be further described in detail in the Detailed Description of the Invention. The Summary of the Invention does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the scope of protection of the claimed technical solution.

[0004] To at least partially solve the above problems, the present invention provides a method for improving a cast-in-place pile reinforcement cage, comprising:

[0005] Step 1: main reinforcement processing and connection;

[0006] Step 2: Processing of reinforcement bars;

[0007] Step 3: Install the main reinforcement and the frame reinforcement. Mark the position of the main reinforcement on the frame reinforcement. Place the main reinforcement on a flat working platform and mark the position of the frame reinforcement on the main reinforcement.

[0008] Step 4: Install stirrups.

[0009] According to the improved method of the cast-in-place pile reinforcement cage of the embodiment of the present invention, in the step 1, the reinforcement should be derusted and decontaminated before feeding to ensure that the surface of the reinforcement is clean.

[0010] According to the improved method of the cast-in-place pile reinforcement cage according to the embodiment of the present invention, the step one also includes: modifying the main reinforcement, selecting 2 main reinforcements for modification in each reinforcement cage, the main reinforcement material needs to be one level larger in diameter than the design requirements, and one modified main reinforcement is provided with two short reinforcements along the length direction of the main reinforcement according to the stirrup spacing starting from the first frame reinforcement, and the other modified main reinforcement is provided with a short reinforcement according to the above method at a distance of 1 / 2 stirrup spacing from the first frame reinforcement.

[0011] According to the improved method of the cast-in-place pile reinforcement cage according to the embodiment of the present invention, the vertical reinforcement in the step 2 is welded by a single-sided lap welding process, and the lap length is not less than 10d.

[0012] According to the improved method of the cast-in-place pile reinforcement cage of the embodiment of the present invention, the main reinforcement in step three is placed on the outside of the frame reinforcement and kept perpendicular to each other. During welding, the mark of any main reinforcement on the frame reinforcement is aligned with the frame reinforcement mark in the middle of the main reinforcement. The frame reinforcement is straightened, and then spot welding is performed to fix it, and then unified welding is performed. The welding should be firm and biting is strictly prohibited. The welding slag should be cleaned up in time during the welding process.

[0013] According to the improved method of the cast-in-place pile reinforcement cage according to the embodiment of the present invention, the stirrups in step four are set as spiral stirrups, and the spiral stirrups are arranged between the first frame reinforcement and the last frame reinforcement. The intersection of the spiral stirrups and the main reinforcement is tied with fire-burned wire and close to the main reinforcement. It needs to be fully tied, and the binding buckles are in an "eight" shape with each other. It is strictly forbidden to tie them in a straight line, and they must be tied firmly.

[0014] According to the improved method of the cast-in-place pile reinforcement cage according to the embodiment of the present invention, during the implementation of step three, the main reinforcements should be symmetrically distributed on both sides of the reinforcement cage.

[0015] According to the improved method of the cast-in-place pile reinforcement cage according to the embodiment of the present invention, after step three and before step four, it also includes: adding reinforcing bars at the hanging point position, that is, welding reinforcing bars at the intersection of the frame bars and the main bars at the hanging point position to strengthen the stiffness of the hanging point, wherein the reinforcing bars should be arranged on the upper side of the frame bars, and the remaining main bars can be used, the length should be not less than 5d, and double-sided lap welded with the main bars.

[0016] According to the improved method of the cast-in-place pile reinforcement cage of the embodiment of the present invention, during the implementation of step 4, the intersection of the spiral stirrup and the modified main reinforcement should be located between the two short reinforcements.

[0017] The improved method of the cast-in-place pile reinforcement cage according to the embodiment of the present invention also includes: step five, modifying the winding method of the stirrup ends, and winding three circles in parallel at both ends of the stirrup.

[0018] Compared with the prior art, the present invention has at least the following beneficial effects:

[0019] 1. By setting marks on the main reinforcement and frame reinforcement, the main reinforcement spacing deviation and the steel cage diameter deviation can be effectively controlled.

[0020] 2. By modifying the main reinforcement, the spacing of the spiral stirrups can be effectively controlled, and lateral constraints can be applied to the spiral stirrups to reduce their displacement. At the same time, it replaces the traditional practice of setting up protective reinforcements to ensure the thickness of the protective layer, which can more effectively ensure the thickness of the steel bar protective layer and improve the durability of the cast-in-place pile.

[0021] 3. By adding reinforcing ribs at the lifting point, the rigidity of the lifting point can be increased, the steel cage can be prevented from falling off during the lifting process, and the safety of the steel cage lifting process can be improved.

[0022] 4. By modifying the winding method of the stirrup ends, the deformation of the steel cage during concrete pouring can be effectively avoided.

[0023] The improved method of the cast-in-place pile reinforcement cage described in the present invention, and other advantages, objectives and features of the present invention will be reflected in part through the following description, and in part will be understood by technicians in this field through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0025] Figure 1 It is a structural schematic diagram of the present invention.

[0026] Figure 2 It is a schematic diagram of the connection structure of the main reinforcement in the present invention.

[0027] Figure 3 For the present invention Figure 2 Schematic diagram of the structure of the AA section.

[0028] Figure 4 It is a schematic diagram of the main reinforcement modified in the present invention.

[0029] Figure 5 It is a schematic diagram of the installation of the main reinforcement and the frame reinforcement in the present invention.

[0030] Figure 6 It is a schematic diagram of the suspension point reinforcement ribs in the present invention.

[0031] Figure 7 It is a schematic diagram of steel bar binding in the present invention.

[0032] Figure 8 It is a schematic diagram of the end winding of the stirrups in the present invention.

[0033] Fig. 9 It is a schematic cross-sectional view of the steel cage in the present invention.

[0034] Fig.10It is a structural schematic diagram of the anti-motion module in the present invention.

[0035] Fig.11 For the present invention Fig.10 Schematic diagram of the enlarged structure of the part B in the middle.

[0036] Fig.12 It is a schematic diagram of the internal structure of the anti-motion module in the present invention.

[0037] Fig.13 For the present invention Fig.12 Schematic diagram of the enlarged structure of the part C in the middle.

[0038] Fig.14 It is a structural schematic diagram of the external pulling mechanism in the present invention.

[0039] Fig.15 It is a structural schematic diagram of the locking mechanism in the present invention. DETAILED DESCRIPTION

[0040] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments so that those skilled in the art can implement the invention with reference to the description.

[0041] It should be understood that the terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0042] like Figure 1-Figure 9 As shown, the present invention provides an improved method for a cast-in-place pile reinforcement cage, comprising:

[0043] Step 1: Processing and connecting the main reinforcement 11. The two main reinforcements 11 are connected by a straight threaded sleeve 12. The raw materials should be used to the maximum extent possible to reduce the amount of waste and the butt joints of the reinforcement. The reinforcement should be derusted and decontaminated before cutting to ensure that the surface of the reinforcement is clean. The water rust at the spot welding point must be cleaned, and then the main reinforcement is connected.

[0044] Furthermore, the step one also includes: modifying the main reinforcement 11, selecting 2 main reinforcements 11 for each steel cage for modification, the material selection of the main reinforcement 11 needs to be one level larger in diameter than the design requirements (for example, if the design requires the use of Φ22 reinforcement, the modified main reinforcement needs to use Φ25 reinforcement), and setting two short reinforcements 15 along the length direction of the main reinforcement 11 according to the stirrup spacing starting from the first frame reinforcement (main reinforcement leftovers can be used and connected to the main reinforcement by electric welding, the length of the short reinforcement should be the thickness of the protective layer - 1mm, and the spacing should be the stirrup diameter), and setting another modified main reinforcement 11 with a short reinforcement 15 according to the above method at a distance of 1 / 2 of the stirrup spacing from the first frame reinforcement.

[0045] Step 2: Processing the reinforcement 16, wherein the reinforcement 16 is welded by single-sided lap welding, and the lap length is not less than 10d;

[0046] Step 3: Install the main reinforcement 11 and the frame reinforcement 16, mark the position of the main reinforcement 11 on the frame reinforcement 16, place the main reinforcement on a flat work platform and mark the position of the frame reinforcement 16 on the main reinforcement 11;

[0047] In step 3, the main reinforcement 11 is placed outside the frame reinforcement 16, and they are kept perpendicular to each other. When welding, the mark of any main reinforcement on the frame reinforcement is aligned with the frame reinforcement mark in the middle of the main reinforcement, the frame reinforcement is straightened, and then spot welding is performed first. Figure 3 As shown, the welding points 13 between the two main bars 11 are welded uniformly, the welding should be firm, and biting is strictly prohibited. The welding slag should be cleaned up in time during the welding process.

[0048] Furthermore, during the implementation of step three, the main reinforcement should be symmetrically distributed on both sides of the reinforcement cage.

[0049] After step three and before step four, the method also includes: adding reinforcing ribs 17 at the hanging point, that is, welding reinforcing ribs 17 at the intersection of the erection bars 16 and the main bars 11 at the hanging point to strengthen the rigidity of the hanging point, wherein the reinforcing ribs 17 should be arranged on the upper side of the erection bars, and the remaining materials of the main bars 11 can be selected, the length should be not less than 5d, and double-sided lap welds with the main bars are performed.

[0050] Step 4, installation of stirrups 18, wherein the stirrups 18 are configured as spiral stirrups, the spiral stirrups are arranged between the first frame reinforcement 16 and the last frame reinforcement 16, the intersection of the spiral stirrups and the main reinforcement is tied with fire-burned wire 9 and is close to the main reinforcement, it needs to be fully tied, the binding buckles are in an "eight" shape with each other, it is strictly forbidden to tie in a straight line, and the binding must be firm.

[0051] Furthermore, during the implementation of step 4, the intersection of the spiral stirrups and the modified main reinforcement should be such that the spiral stirrups are located between the two short steel bars.

[0052] Step five: Change the winding method of the stirrup ends, and wrap three circles in parallel at both ends of the stirrups.

[0053] Through the above design, the improved method of the cast-in-place pile reinforcement cage of the present invention has the following effects:

[0054] 1. By setting marks on the main reinforcement and frame reinforcement, the main reinforcement spacing deviation and the steel cage diameter deviation can be effectively controlled.

[0055] 2. By modifying the main reinforcement, the spacing of the spiral stirrups can be effectively controlled, and lateral constraints can be applied to the spiral stirrups to reduce their displacement. At the same time, it replaces the traditional practice of setting up protective reinforcements to ensure the thickness of the protective layer, which can more effectively ensure the thickness of the steel bar protective layer and improve the durability of the cast-in-place pile.

[0056] 3. By adding reinforcing ribs at the lifting point, the rigidity of the lifting point can be increased, the steel cage can be prevented from falling off during the lifting process, and the safety of the steel cage lifting process can be improved.

[0057] 4. By modifying the winding method of the stirrup ends, the deformation of the steel cage during concrete pouring can be effectively avoided.

[0058] Furthermore, an anti-movement module 2 is installed on the working platform, and the cast-in-place pile reinforcement cage can be assisted in fixing by the anti-movement module 2. Specifically, the operator uses two frame bars 16 to tie multiple main bars 11 firmly into a circle, thereby forming a prototype of the cast-in-place pile reinforcement cage. Here, the prototype cast-in-place pile reinforcement cage is set as the reinforcement cage body 100, and then the reinforcement cage body 100 can be inserted into the anti-movement module 2, and then the stirrups 18 are added to form the final cast-in-place pile reinforcement cage. In this process, the construction difficulty of the operator is reduced, and the efficiency of making the cast-in-place pile reinforcement cage is greatly improved.

[0059] Exemplary Anti-Motion Module

[0060] like Figure 10-11 As shown, further, some embodiments of the present invention provide a specific structure of an anti-movement module 2, wherein the anti-movement module 2 of this structure includes a magnetic block 3 and an upper movable block 4, wherein an iron plate (not shown) is provided on the working platform, the magnetic block 3 can be magnetically attracted to the iron plate (not shown), and the upper movable block 4 is movably installed on the magnetic block 3, the upper movable block 4 is connected to a frame plate 40 through a plurality of inner pull frames 41, and two side fixing frames 5 and an intermediate frame 6 are installed on the frame plate 40, and the intermediate frame 6 is located between the two side fixing frames 5, so that the steel cage body 100 can be inserted between the two side fixing frames 5 and the intermediate frame 6, so as to realize the protection and fixation of the steel cage body 100 to prevent it from accidentally falling off the steel pull rod 200.

[0061] Furthermore, the above-mentioned inner pull frame 41 includes an inner tension spring 411 and an inner pull rod 412. The inner pull rod 412 is connected to the bottom of the frame plate 40. Correspondingly, the upper moving block 4 has an inner pull groove 400 corresponding to the inner pull rod 412, so the inner tension spring 411 is sleeved on the inner pull rod 412 and connected to the frame plates 40 and the upper moving block 4 on both sides, so that the frame plate 40 has a tendency to move toward the upper moving block 4.

[0062] Example Magnetic Block

[0063] like Fig.12As shown, further, some embodiments of the present invention provide a specific structure of the above-mentioned magnetic block 3, in which the magnetic block 3 has an inner cavity 31, and a second inner support mechanism 32 is installed in the inner cavity 31, wherein the second inner support mechanism 32 here includes a bidirectional screw 321, two screw cylinders 322, two elastic hinges 323, an inner fixing plate 324, and a magnetic plate 325. Specifically, the above-mentioned bidirectional screw 321 is penetrated in the inner cavity 31, and both ends of the bidirectional screw 321 pass through the magnetic block 3, and a T-shaped handle 326 is arranged on the outer end, and the two screw cylinders 322 are installed on the bidirectional screw 321 at intervals, the inner fixing plate 324 is installed at the bottom of the upper moving block 4, and the magnetic plate 325 is slidably installed in the magnetic hole 301 of the magnetic block 3, and the two elastic hinges 323 are respectively connected to the screw cylinders 322, and the open ends of the elastic hinges 323 are respectively connected to the inner fixing plate 324 and the magnetic plate 325. When the T-shaped handle 326 is rotated, the two screw cylinders 322 approach each other, causing the elastic hinge 323 to deform, and then the elastic hinge 323 pushes the magnetic plate 325 located in the magnetic hole 301 outward, so that the magnetic plate 325 can be magnetically attracted to the iron plate (not shown), thereby realizing the connection between the above-mentioned anti-motion module 2 and the working platform, and also facilitating the subsequent separation of the two.

[0064] Exemplary side brackets

[0065] like Figure 12-13 As shown, further, some embodiments of the present invention provide a specific structure of the side fixing frame 5, wherein the side fixing frame 5 of the structure includes a side fixing ring 51, a side slide plate 52, and a U-shaped torsion spring rod 53. Here, the side slide plate 52 is mounted on the frame plate 40, and the U-shaped torsion spring rod 53 is mounted on the two outer walls of the upper moving block 4. The U-shaped torsion spring rod 53 is buckled on the frame plate 40 and is located on the outer side of the side slide plate 52. A plurality of openings 521 are designed on the side slide plate 52. The side fixing ring 51 can be slidably mounted on the side slide plate 52. The U-shaped torsion spring rod 53 prevents the side fixing ring 51 from detaching from the side slide plate 52. The side fixing ring 51 has an inner liner ring 52. 10. The steel cage body 100 can be further fixed by the inner lining ring 510; an inner slot 511 is provided in the side fixing ring 51, and a first clamping member 512 and a second clamping member 513 are installed in the inner slot 511, and a first clamping spring 514 is installed on the first clamping member 512, and a second clamping spring 515 is installed in the second clamping member 513. The first clamping member 512 presses against the second clamping spring 515, so that the second clamping member 513 passes through the side fixing ring 51 and presses against the inner lining ring 510, and the first clamping member 512 passes through the side fixing ring 51 and extends into the opening 521, so that the side fixing ring 51 is installed on the side slide 52. The side fixing frame 5 of the above structure can fix the steel cage body 100, and the two side fixing frames 5 can adjust the left and right spacing according to the length of the steel cage body 100.

[0066] Example intermediate frame

[0067] Further, some embodiments of the present invention provide a specific structure of the intermediate frame 6, wherein the intermediate frame 6 of the structure includes an outer U-shaped support block 61, an intermediate slider 62, a first inner support mechanism 63, and an outer pull mechanism 64, wherein the first inner support mechanism 63 is installed inside the upper moving block 4, the outer pull mechanism 64 is installed on the outer wall of the upper moving block 4, and the outer pull mechanism 64 is movably connected to the outer pull mechanism 64, and the first inner support mechanism 63 is driven by the outer pull mechanism 64 to move;

[0068] The above-mentioned middle slider 62 is passed through the frame plate 40. Furthermore, the outer U-shaped support block 61 is movably installed on the middle slider 62. Correspondingly, a placement groove 611 is opened on the outer U-shaped support block 61, so that the steel cage body 100 can be placed in the two placement grooves 611, and a locking mechanism 65 is also installed in the outer U-shaped support block 61. The locking mechanism 65 can fix the steel cage body 100, thereby increasing the firmness of the anti-motion module 2 to the steel cage body 100.

[0069] Furthermore, the outer U-shaped support block 61 has a locking rod 641, which passes through the outer U-shaped support block 61 and is screwed to the middle slider 62 at the bottom, and the middle slider 62 also has a support rod 620 corresponding to the outer U-shaped support block 61, so that the outer U-shaped support block 61 can be fixed to the middle slider 62.

[0070] Exemplary first internal support mechanism

[0071] like Fig.14As shown, further, some embodiments of the present invention provide a specific structure of the above-mentioned first internal support mechanism 63, in which the first internal support mechanism 63 includes a plurality of eccentric support blocks 631, which are rotatably installed between the upper moving block 4 and the middle slider 62, and can support the frame plate 40, and the external pulling mechanism 64 includes an intermediate pull rod 641 and an outer rotating rod 642, wherein the intermediate pull rod 641 is passed through the upper moving block 4 and is rotatably connected with the plurality of eccentric support blocks 631, and one end of the intermediate pull rod 641 is slidably connected in the inner slide groove 645 of the outer rotating rod 642, one end of the outer rotating rod 642 is rotatably installed on the outer wall of the upper moving block 4, and the other end is connected to the outer locking block 42 of the upper moving block 4 through an L-shaped locking rod 643 and a locking spring 644. Therefore, when the L-shaped locking rod 643 is pulled and the locking spring 644 is compressed by the L-shaped locking rod 643, the other end of the outer rotating rod 642 is separated from the outer locking block 42, and then the outer rotating rod 642 can be rotated, and then one end of the middle pull rod 641 slides along the inner slide groove 645 and is pulled out from the upper moving block 4. It can be understood that when the middle pull rod 641 moves outward, it drives the eccentric support block 631 to rotate, and then the eccentric support block 631 rotates from one side of the frame plate 40 to the middle slide block 62, so that under the action of the inner pulling frame 41, the frame plate 40 moves relative to the middle slider 62, and then the side fixing frame 5 on the frame plate 40 has a tendency to pull the steel cage body 100, and the middle frame 6 has a tendency to push the steel cage body 100, so that the anti-motion module 2 fixes the steel cage body 100, which is convenient for the subsequent installation of stirrups 18 to form the final cast-in-place pile steel cage. In this process, the construction difficulty of the operator is reduced and the efficiency of making the cast-in-place pile steel cage is greatly improved.

[0072] Exemplary Locking Mechanisms

[0073] like Fig.15As shown, further, some embodiments of the present invention provide a specific structure of the above-mentioned locking mechanism 65, where the locking mechanism 65 of the structure includes an inner locking rod 651, a locking cap body 652, and an inner spring 653, wherein the inner locking rod 651 is inserted into the outer U-shaped support block 61, and two eccentric rods 654 are installed on the inner locking rod 651, and the outer U-shaped support block 61 has a guide ball 655 corresponding to the eccentric rod 654, where the guide ball 655 can be exposed to the placement groove 611, so it can contact the main reinforcement 11 or the straight threaded sleeve 12, thereby facilitating the left and right movement of the reinforcement cage body 100 In order to be in a suitable position, an inner spring 653 is installed in the inner spring groove 613 of the outer U-shaped support block 61, and the inner locking rod 651 passes through the inner spring 653 and is connected to the locking cap body 652. Therefore, when the locking cap body 652 is rotated, the eccentric rod 654 can be rotated to abut against the guide ball 655, locking it from the inside, so that the steel cage body 100 cannot move in the placement groove 611, thereby facilitating the subsequent installation of stirrups 18, and the inner spring 653 abuts against the locking cap body 652, so that the locking cap body 652 is tightly attached to the inner spring groove 613, preventing the inner locking rod 651 from rotating and loosening the guide ball 655.

[0074] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0075] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0076] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A method for improving a cast-in-place pile reinforcement cage, characterized in that: include: Step 1: main reinforcement processing and connection; Step 2: Processing of reinforcement bars; Step 3: Install the main reinforcement and the frame reinforcement. Mark the position of the main reinforcement on the frame reinforcement. Place the main reinforcement on a flat working platform and mark the position of the frame reinforcement on the main reinforcement. Step 4: Install stirrups.

2. The improved method for a cast-in-place pile reinforcement cage according to claim 1, characterized in that: In the step 1, the steel bars should be derusted and decontaminated before unloading to ensure that the surface of the steel bars is clean.

3. The improved method for a cast-in-place pile reinforcement cage according to claim 1, characterized in that: The step one also includes: modifying the main reinforcement, selecting 2 main reinforcements for each steel cage for modification, the main reinforcement material needs to be one level larger in diameter than the design requirements, and one modified main reinforcement is provided with two short reinforcements along the length direction of the main reinforcement according to the stirrup spacing starting from the first frame reinforcement, and another modified main reinforcement is provided with a short reinforcement at a distance of 1 / 2 stirrup spacing from the first frame reinforcement according to the above method.

4. The improved method for a cast-in-place pile reinforcement cage according to claim 1, characterized in that: In the step 2, the vertical reinforcement is welded by single-sided lap welding, and the lap length is not less than 10d.

5. The improved method for a cast-in-place pile reinforcement cage according to claim 1, characterized in that: In the step three, the main reinforcement is placed on the outside of the frame reinforcement and kept perpendicular to each other. During welding, the mark of any main reinforcement on the frame reinforcement is aligned with the frame reinforcement mark in the middle of the main reinforcement. The frame reinforcement is straightened and then spot welded to fix it first, and then unified welding is performed. The welding should be firm and biting is strictly prohibited. The welding slag should be cleaned up in time during the welding process.

6. The improved method for a cast-in-place pile reinforcement cage according to claim 1, characterized in that: In the step 4, the stirrups are set as spiral stirrups, and the spiral stirrups are set between the first frame reinforcement and the last frame reinforcement. The intersection of the spiral stirrups and the main reinforcement is tied with fire-burned wire and close to the main reinforcement. It needs to be fully tied, and the binding buckles are in an "eight" shape with each other. It is strictly forbidden to tie it in a straight line, and it must be tied firmly.

7. The method for improving a cast-in-place pile reinforcement cage according to claim 1 or 5, characterized in that: During the implementation of step three, the main reinforcement should be symmetrically distributed on both sides of the reinforcement cage.

8. The improved method for a cast-in-place pile reinforcement cage according to claim 1, characterized in that: After step three and before step four, the method also includes: adding reinforcing ribs at the hanging point, that is, welding reinforcing ribs at the intersection of the frame bars and the main bars at the hanging point to strengthen the stiffness of the hanging point, wherein the reinforcing ribs should be arranged on the upper side of the frame bars, and the remaining main bars can be used, with a length of not less than 5d, and double-sided lap welded with the main bars.

9. The improved method for a cast-in-place pile reinforcement cage according to claim 1, characterized in that: During the implementation of step 4, the intersection of the spiral stirrups and the modified main reinforcement should be located between the two short steel bars.

10. The method for improving a cast-in-place pile reinforcement cage according to claim 1, characterized in that: It also includes: Step 5, modifying the winding method of the stirrup ends, and winding three circles in parallel at both ends of the stirrups.

Images