Piling method for reinforced concrete piles

Abstract

The present invention relates to the technical field of building structural components, and in particular to a method for connecting reinforced concrete piles, including a main reinforcement joint, wherein the main reinforcement joint includes a fixing structure and a connecting structure, wherein the fixing structure includes a fixing pipe, when a lower reinforcement cage is lowered to the end to be exposed, it is fixed, an upper reinforcement cage is hoisted, the two ends of the reinforcement cages are made to face each other, and the main reinforcement heads are connected, and the reinforced concrete pile connection structure provided by the present embodiment is used, the main reinforcement joint is sleeved on the main reinforcement head of the lower reinforcement cage through the fixing pipe, the height of the main reinforcement joint is controlled by a blocking structure, the upper end of the main reinforcement head of the lower reinforcement cage is extended to exceed a guide port, thereby avoiding interference with the main reinforcement head of the upper reinforcement cage, the upper reinforcement cage is controlled to descend, the ends of the upper reinforcement cage and the lower reinforcement cage are made close to each other, and then the main reinforcement joints are connected upward to the main reinforcement head of the upper reinforcement cage one by one, so as to facilitate connection.

Description

Technical Field

[0001] The present invention relates to the technical field of reinforced concrete piles, and particularly to a method for connecting reinforced concrete piles. Background Art

[0002] Reinforced concrete piles are a common type of pile foundation. They combine the high tensile strength of main reinforcement bars and the high compressive strength of concrete, enabling the piles to have good bearing capacity and durability, and are widely used in buildings.

[0003] Since the depth of reinforced concrete piles is relatively deep, multiple prefabricated steel cage reinforcements are usually connected to obtain a steel cage reinforcement of the required length. When connecting the steel cage reinforcements, welding connection, mechanical connection, binding connection, and a combination of mechanical and welding methods are usually used. Due to the heavy weight of the steel cage reinforcements, they are deformed during transportation, resulting in irregular orientations of the main reinforcement bar heads. During the processes of welding and mechanical connection, the main reinforcement bar heads need to be pre-bent, and then welding or mechanical connection is carried out. Due to the large outer diameter of the main reinforcement bars, the pre-bending is difficult, and each needs to be pre-bent one by one. After two steel cage reinforcements are connected, overall straightening is carried out. Due to the differences between the connections of each main reinforcement bar head, the stress distribution between each main reinforcement bar head is uneven. To achieve the connection between the main reinforcement bar heads of the steel cage reinforcements, technicians in this field have developed various connecting pieces. During laboratory tests, the two main reinforcement bar heads can move freely, and then quickly cooperate with the connecting pieces for strength testing. During on-site use, a support frame (plate) is often required to correct the positions of the main reinforcement bar heads before the connecting pieces can be installed. In most cases, even with the support frame (plate), it is very difficult to achieve the positioning of the main reinforcement bar heads, and after the connection of the steel cage reinforcements is completed, the support frame (plate) cannot be removed. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a method for connecting reinforced concrete piles.

[0005] The present invention is realized through the following technical solutions: A connecting structure for a reinforced concrete pile includes a main reinforcement bar reinforcement joint. The main reinforcement bar reinforcement joint includes a fixing structure and a connecting structure. The fixing structure includes a fixing connecting pipe, and the fixing connecting pipe is connected to one of the main reinforcement bar heads. The connecting structure includes a connecting connecting pipe. The fixing connecting pipe and the connecting connecting pipe are coaxially arranged. A guiding port one is provided at the end of the connecting connecting pipe. A main reinforcement bar head positioning structure is provided between the connecting connecting pipe and the fixing connecting pipe. The main reinforcement bar head positioning structure includes a connecting cavity, and a welding operation hole is provided on the side wall of the connecting cavity.

[0006] Further, the inner diameter value of the connecting connecting pipe is 1 - 1.5 mm larger than the inner diameter value of the fixing connecting pipe.

[0007] Further, the fixed connecting pipe is connected with a blocking structure that cooperates with the corresponding main reinforcement head.

[0008] Further, the blocking structure includes a blocking protrusion provided at the inner end of the fixed connecting pipe, and the blocking protrusion cooperates with the transverse rib of the deformed bar.

[0009] Further, the blocking structure includes a friction layer provided on the fixed connecting pipe.

[0010] Further, an inner connecting member is provided in the connecting cavity, and both ends of the inner connecting member are connected to the main reinforcement head.

[0011] Further, the inner connecting member includes a connecting plate with an arc-shaped cross-section, and the connecting plate is fixedly welded to the side of the main reinforcement head.

[0012] Further, a transverse support rib is connected between multiple main reinforcement reinforcement joints.

[0013] The beneficial effect of the present invention is as follows: When a lower steel reinforcement cage is lowered to the end and exposed for fixation, an upper steel reinforcement cage is hoisted, so that the ends of the two steel reinforcement cages are facing each other, and the main reinforcement heads are connected. By using the pile splicing structure of the reinforced concrete pile provided in this embodiment, the main reinforcement reinforcement joint is sleeved on the main reinforcement head of the lower steel reinforcement cage through the fixed connecting pipe, and the height of the main reinforcement reinforcement joint is controlled by the blocking structure, so that the upper end of the main reinforcement head of the lower steel reinforcement cage extends beyond the first guiding opening, thereby avoiding interference with the main reinforcement head of the upper steel reinforcement cage, controlling the descent of the upper steel reinforcement cage, making the ends of the upper steel reinforcement cage and the lower steel reinforcement cage close to each other, and then successively connecting the main reinforcement reinforcement joints upward to the main reinforcement heads of the upper steel reinforcement cage, which is convenient for connection. Description of the Drawings

[0014] Figure 1 It is a schematic structural diagram of Embodiment 1;

[0015] Figure 2 It is a schematic structural diagram of the second arrangement mode of the support rib;

[0016] Figure 3 It is a schematic structural diagram of the main reinforcement reinforcement joint;

[0017] Figure 4 It is a schematic cross-sectional view of the main reinforcement reinforcement joint;

[0018] Figure 5 It is a schematic structural diagram of the blocking protrusion;

[0019] Figure 6 It is a schematic structural diagram of the connecting plate;

[0020] Figure 7 It is a schematic structural diagram of the main reinforcement head adjustment tool.

[0021] Among them: 1. Main reinforcement joint; 101. Second guiding port; 102. Fixed connecting pipe; 103. Connecting cavity; 104. Welding operation hole; 105. Connecting pipe; 106. First guiding port; 107. Connecting plate; 108. Blocking protrusion;

[0022] 2. Supporting reinforcement;

[0023] 301. Connecting arm; 302. First bayonet; 303. Second bayonet; 304. Handle. Specific implementation manner

[0024] In the description of the present invention, it should also be noted that unless otherwise clearly defined and limited, the terms "set", "install", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. Embodiment

[0026] As Figures 1-6 shown, a method for connecting reinforced concrete piles is used for the steel reinforcement cage of a reinforced concrete pile with a main reinforcement outer diameter of 14 mm. It includes a main reinforcement joint 1. The main reinforcement joint 1 includes a fixing structure and a connecting structure. The fixing structure includes a fixed connecting pipe 102, and the fixed connecting pipe 102 is connected to one of the main reinforcement heads. The connecting structure includes a connecting pipe 105. The fixed connecting pipe 102 and the connecting pipe 105 are coaxial, so that the two steel reinforcement cages can be facing each other, and thus it can be ensured that the resistance is small during the process of lowering the connected steel reinforcement cage into the pile well. A first guiding port 106 is integrally formed at the end of the connecting pipe 105. The first guiding port 106 is a flared port, which can guide the main reinforcement head so that the main reinforcement head can enter the connecting pipe 105.

[0027] There is an integrally formed main bar head positioning structure between the connecting nozzle 105 and the fixed nozzle 102. The main bar head positioning structure includes a connecting cavity 103. A welding operation hole 104 is integrally formed on the side wall of the connecting cavity 103. In this embodiment, the connecting cavity 103 is ellipsoidal, the major axis of the connecting cavity 103 is coaxial with the connecting nozzle 105, the welding operation hole 104 is an elliptical hole, the major axis of the welding operation hole 104 is parallel to the major axis of the connecting cavity 103, and there are two welding operation holes 104, symmetrically distributed on both sides of the connecting cavity 103, so that the main bar heads in the connecting holes can be welded. In addition, the welding operation hole 104 also serves as a driving hole for the rotation of the main bar reinforcement joint 1, and then a force applying rod or a wrench is connected.

[0028] The fixed nozzle 102 is connected with a blocking structure that cooperates with the corresponding main bar head. The blocking structure includes a blocking protrusion 108 integrally formed at the inner end of the fixed nozzle 102. The blocking protrusion 108 cooperates with the transverse ribs of the deformed bar. The blocking protrusion 108 is hemispherical and symmetrically distributed on both sides of the inner wall of the fixed nozzle 102. The fixed nozzle 102 is integrally formed with a second guiding port 101, and the second guiding port 101 is also a flared port, so that the main bar head can be guided and the main bar head can enter the fixed nozzle 102. In addition, the second guiding port 101 also serves as an operating part. During on-site construction, by knocking on the outer wall of the second guiding port 101, the main bar reinforcement joint 1 can be vibrated, and then the main bar head can be stably inserted into the fixed nozzle 102.

[0029] In this embodiment, the inner diameter value of the fixed nozzle 102 is 15 mm, the length value is 30 mm, the wall thickness is 8 mm, the maximum inner diameter of the second guiding port 101 is 18 mm, the major axis length value of the connecting cavity 103 is 40 mm, the minor axis length value is 25 mm, the wall thickness is 8 mm, the inner diameter value of the connecting nozzle 105 is 16 mm, the length value is 30 mm, the wall thickness is 8 mm, the maximum inner diameter of the first guiding port 106 is 25 mm, the major axis length value of the welding operation hole 104 is 25 mm, and the minor axis length value is 20 mm. The fixed nozzle 102, the second guiding port 101, the connecting cavity 103, the welding operation hole 104, the connecting nozzle 105 and the first guiding port 106 are cast from steel, which is convenient for transportation and has a high degree of fit with the main bar head.

[0030] The fixed nozzle 102 is connected with a blocking structure that cooperates with the corresponding main bar head. There are two types of blocking structures. The first is rigid blocking. Specifically, the blocking structure includes a blocking protrusion 108 integrally formed at the inner end of the fixed nozzle 102. The blocking protrusion 108 cooperates with the transverse ribs of the deformed bar, so as to rigidly control the position between the fixed nozzle 102 and the main bar head. The second is frictional blocking. Specifically, the blocking structure includes a friction layer attached to the fixed nozzle 102. The friction layer can be a nested rubber layer or a polyurethane adhesive coating obtained by smearing.

[0031] An inner connector is installed in the connection cavity 103. Both ends of the inner connector are connected to the main bar head. Specifically, the inner connector includes a connecting plate 107 with an arc-shaped cross-section. There are more than two connecting plates 107. The cross-section of the connecting plate 107 is arc-shaped. The connecting plate 107 is made of a steel plate with a thickness of 3 mm. The connecting plate 107 is welded and fixed to the side of the main bar head. Since the welding operation hole 104 is an elongated hole, the connecting plate 107 can be inserted into the connection cavity 103 and then adjusted in position. To ensure the welding stability, the radian angle of the cross-section of the connecting plate 107 is 80 - 100°, and the length value is 25 mm, thus ensuring that it can be inserted into the connection cavity 103.

[0032] During the construction of reinforced concrete piles, first drill a pile well, and then hoist and insert a prefabricated steel reinforcement cage into the pile well. Since the pile well is relatively deep and there are multiple prefabricated steel reinforcement cages, when a lower steel reinforcement cage is lowered to the end and exposed, it is fixed, and then an upper steel reinforcement cage is hoisted to make the ends of the two steel reinforcement cages face each other, and the main reinforcement heads are connected. Using the pile splicing structure of the reinforced concrete pile provided in this embodiment, the main reinforcement reinforcement joint 1 is sleeved on the main reinforcement head of the lower steel reinforcement cage through the fixed connecting pipe 102, and the height of the main reinforcement reinforcement joint 1 is controlled by the blocking structure, so that the upper end of the main reinforcement head of the lower steel reinforcement cage extends beyond the first guiding opening 106, thereby avoiding interference with the main reinforcement head of the upper steel reinforcement cage. Control the descent of the upper steel reinforcement cage to make the ends of the upper steel reinforcement cage and the lower steel reinforcement cage close to each other, and then connect the main reinforcement reinforcement joint 1 to the main reinforcement head of the upper steel reinforcement cage upward one by one. Due to the position deviation, auxiliary tools are needed for connection during this process. The auxiliary tools include a hammer, which strikes the second guiding opening 101 upward, so that the main reinforcement reinforcement joint 1 moves upward. During this period, the blocking structure is damaged. When the lower end of the main reinforcement head of the upper steel reinforcement cage enters the middle position of the connection cavity 103, stop knocking. Under normal conditions, due to the position difference between the main reinforcement head of the upper steel reinforcement cage and the main reinforcement head of the lower steel reinforcement cage, the main reinforcement reinforcement joint 1 will not slide down. When operating other main reinforcement reinforcement joints 1, the disturbance to the upper steel reinforcement cage makes the main reinforcement reinforcement joint 1 at risk of sliding down. Insert the connecting plate 107 horizontally into the connection cavity 103, and the end of the connecting plate 107 is supported by the welding operation opening, thereby preventing the main reinforcement reinforcement joint 1 from sliding down. After all the main reinforcement reinforcement joints 1 are adjusted, shake the upper steel reinforcement cage, so that the main reinforcement heads of the upper steel reinforcement cage and the lower steel reinforcement cage automatically adjust their positions to weaken the stress difference after welding and fixing. Then, pull out the connecting plate 107 one by one, and weld the main reinforcement heads of the upper steel reinforcement cage and the lower steel reinforcement cage through the welding operation hole 104. During this period, the main reinforcement reinforcement joint 1 can be rotated to ensure the welding area. And due to the limiting effect of the fixed connecting pipe 102 and the connecting pipe 105, the main reinforcement heads of the upper steel reinforcement cage and the lower steel reinforcement cage are in opposite positions, thereby ensuring the welding effect. After welding, insert the connecting plate 107 through the welding operation hole 104, adjust the connecting plate 107 to be vertical, and then weld the connecting plate 107 to the main reinforcement heads of the upper steel reinforcement cage and the lower steel reinforcement cage, thereby improving the connection stability between the main reinforcement heads of the upper steel reinforcement cage and the lower steel reinforcement cage. The welded connecting plate 107 forms an internal connecting piece, thereby improving the tensile strength between the main reinforcement heads of the upper steel reinforcement cage and the lower steel reinforcement cage. After welding, adjust the angle of the welding operation opening, and then weld a horizontal support bar 2 between the welding operation openings of two adjacent main reinforcement reinforcement joints 1. There are two welding methods for the support bar 2. The first is that the welding operation openings of two adjacent main reinforcement reinforcement joints 1 face each other, and then weld through the arc-shaped support bar 2. The end of the support bar 2 is inserted into the welding operation opening. This welding method has no requirement for the relative height of the main reinforcement reinforcement joints 1, but the support bar 2 needs to be intercepted. The second is to adjust each welding operation opening to the same circumference,The welding operation openings of the single main reinforcement bar reinforcement joint 1 face inward and outward respectively, and then are welded by two annular support bars 2. After welding, the stability is higher, but multiple adjustments are required. After the support bars 2 are welded, the first guide opening 106 and the second guide opening 101 are welded to the corresponding main reinforcement bar heads, and the reinforcement cage pile connection is completed. The combined action of multiple welding points and the function of the connecting plate 107 stably connect the two reinforcement cages, and the stress distribution is uniform. In addition, due to the supporting action of the connecting plate 107 and the support bars 2, the connection cavity 103 can be prevented from deforming.

[0033] To quickly adjust the main reinforcement bar heads, a main reinforcement bar head adjustment tool is also provided, such as Figure 7 shown, which includes a connecting arm 301. A first clamping opening 302 that cooperates with the main reinforcement bar head is connected to the first end of the connecting arm 301, and a second clamping opening 303 that cooperates with the main reinforcement bar head is connected to the second end of the connecting arm 301. To prevent the first clamping opening 302 and the second clamping opening 303 from disengaging from the main reinforcement bar head during the operation, the directions of the first clamping opening 302 and the second clamping opening 303 are opposite, so as to clamp the main reinforcement bar head from both sides. A handle 304 is also connected to the second end of the connecting arm 301. The connecting arm 301 is a telescopic arm, so that the cooperation position with the main reinforcement bar head can be selected. Generally, the farther the distance between the first clamping opening 302 and the second clamping opening 303, the better the bending effect on the main reinforcement bar head. During the test, a disc-shaped tool disclosed in the prior art was tried to adjust the main reinforcement bar head. It was found that after the reinforcement cage was transported multiple times, it was very difficult to connect the main reinforcement bar head to the disc-shaped tool. In most cases, it was necessary to use the main reinforcement bar head adjustment tool provided by this application to connect the main reinforcement bar head to the disc-shaped tool, and then drive the disc-shaped tool to make multiple main reinforcement bar heads act simultaneously to control the positions between the main reinforcement bar heads. It was found that a relatively large force was required to achieve this. Using a force-increasing lever for operation or introducing a hydraulic tool was troublesome. After adjusting the positions of the main reinforcement bar heads, it was also necessary to align the two reinforcement cages coaxially and rotate the angles correctly, and then the main reinforcement bar heads of the upper reinforcement cage and the lower reinforcement cage could be connected through a sleeve. The operation cycle was long. After the reinforcement cage connection was completed, it was difficult to take out the disc-shaped tool, and even some disc-shaped tools could not be taken out, which affected the overall structural strength of the pile body after the pile body was poured. However, after using the main reinforcement bar head adjustment tool provided by this application and cooperating with the main reinforcement bar reinforcement joint 1, the corresponding two main reinforcement bar joints can be quickly butted, and they will not disengage after butting. Shake the upper reinforcement cage, so that the main reinforcement bar heads of the upper reinforcement cage and the lower reinforcement cage automatically adjust their positions to weaken the stress difference after welding and fixing. The operation is convenient and fast.

[0034] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A method for connecting reinforced concrete piles, characterized in that, It includes a main reinforcement reinforcement joint. The main reinforcement reinforcement joint includes a fixing structure and a connecting structure. The fixing structure includes a fixing pipe joint. The fixing pipe joint is connected to one of the main reinforcement heads. The connecting structure includes a connecting pipe joint. The fixing pipe joint and the connecting pipe joint are coaxially arranged. A guiding opening one is provided at the end of the connecting pipe joint. A main reinforcement head positioning structure is provided between the connecting pipe joint and the fixing pipe joint. The main reinforcement head positioning structure includes a connecting cavity. The connecting cavity is ellipsoidal. The major axis of the connecting cavity is coaxial with the connecting pipe joint. A welding operation hole is integrally formed on the side wall of the connecting cavity. The welding operation hole is an elliptical hole. The major axis of the welding operation hole is parallel to the major axis of the connecting cavity. There are two welding operation holes, symmetrically distributed on both sides of the connecting cavity. An inner connecting member is arranged in the connecting cavity. The two end parts of the inner connecting member are connected to the main reinforcement heads. The inner connecting member includes a connecting plate with an arc-shaped cross-section. The connecting plate can be inserted into the connecting cavity and then adjusted in position. The connecting plate is welded and fixed to the side part of the main reinforcement head. The fixing pipe joint is integrally formed with a guiding opening two. Both the guiding opening one and the guiding opening two are flared openings. The pile splicing method is as follows. During the construction of a reinforced concrete pile, first drill a pile well, and then hoist and insert a precast steel reinforcement cage into the pile well. There are multiple precast steel reinforcement cages. When one lower steel reinforcement cage is lowered to the end and exposed, it is fixed. Hoist an upper steel reinforcement cage to make the ends of the two steel reinforcement cages face each other, and connect the main reinforcement heads. The main reinforcement reinforcement joint is sleeved on the main reinforcement head of the lower steel reinforcement cage through the fixing pipe joint. The height of the main reinforcement reinforcement joint is controlled by a blocking structure, so that the upper end of the main reinforcement head of the lower steel reinforcement cage extends beyond the guiding opening one. Control the descent of the upper steel reinforcement cage to make the ends of the upper steel reinforcement cage and the lower steel reinforcement cage close. Then, one by one, connect the main reinforcement reinforcement joint upward to the main reinforcement head of the upper steel reinforcement cage. During the process, a connecting tool is needed. The connecting tool includes a hammer. Hammer upward on the guiding opening two to make the main reinforcement reinforcement joint move upward. During this period, the blocking structure is damaged. When the lower end of the main reinforcement head of the upper steel reinforcement cage enters the middle position of the connecting cavity, stop knocking. When operating other main reinforcement reinforcement joints, insert the connecting plate horizontally into the connecting cavity. The end of the connecting plate is supported by the welding operation opening to prevent the main reinforcement reinforcement joint from sliding down. After all the main reinforcement reinforcement joints are adjusted, shake the upper steel reinforcement cage to automatically adjust the positions of the main reinforcement heads of the upper steel reinforcement cage and the lower steel reinforcement cage, weakening the stress difference after welding and fixing. Pull out the connecting plate one by one, and weld the main reinforcement heads of the upper steel reinforcement cage and the lower steel reinforcement cage through the welding operation hole. During this period, rotate the main reinforcement reinforcement joint. Due to the limiting effect of the fixing pipe joint and the connecting pipe joint, the positions of the main reinforcement heads of the upper steel reinforcement cage and the lower steel reinforcement cage are opposite. After welding, insert the connecting plate through the welding operation hole, adjust the connecting plate to make it vertical, and weld the connecting plate to the main reinforcement heads of the upper steel reinforcement cage and the lower steel reinforcement cage. The welded connecting plate forms an inner connecting member.

2. The pile splicing method of the reinforced concrete pile according to claim 1, wherein, The inner diameter value of the connecting pipe joint is 1 - 1.5 mm larger than that of the fixing pipe joint.

3. The pile splicing method of the reinforced concrete pile according to claim 1, characterized in that, A blocking structure matching with the corresponding main reinforcement head is connected to the end of the fixing pipe joint.

4. The pile splicing method for reinforced concrete piles according to claim 3, characterized in that, The blocking structure includes a blocking protrusion arranged at the inner end of the fixed nozzle, and the blocking protrusion is matched with the transverse ribs of the deformed bar.

5. The pile connection method of the reinforced concrete pile according to claim 3, characterized in that, The blocking structure includes a friction layer arranged on the fixed nozzle.

6. The pile splicing method of the reinforced concrete pile according to any one of claims 1-5, characterized in that, Transverse support ribs are connected between multiple main reinforcement joints.

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