Pile splicing structure of reinforced concrete pile

Abstract

The invention relates to the technical field of building structural members, in particular to a reinforced concrete pile splicing structure which comprises a main reinforcement reinforcing connector, the main reinforcement reinforcing connector comprises a fixing structure and a connecting structure, the fixing structure comprises a fixing connecting pipe, and when a lower reinforcement cage is lowered to the tail end to be exposed, an upper reinforcement cage is fixed and hoisted; when the pile splicing structure of the reinforced concrete pile is used, the main reinforcement reinforcing connector is arranged on the main reinforcement head of the lower reinforcement cage in a sleeving mode through the fixing connecting pipe, the height of the main reinforcement reinforcing connector is controlled through the blocking structure, and the main reinforcement heads are connected through the blocking structure. The upper end of the main reinforcement head of the lower reinforcement cage extends out of the first guide opening, interference with the main reinforcement head of the upper reinforcement cage is avoided, the upper reinforcement cage is controlled to descend, the end of the upper reinforcement cage is close to the end of the lower reinforcement cage, then the main reinforcement reinforcing connectors are upwards connected with the main reinforcement head of the upper reinforcement cage one by one, and connection is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of reinforced concrete piles, in particular to a pile connection structure of reinforced concrete piles. Background Art

[0002] Reinforced concrete piles are a common type of pile foundation, which combines the high tensile strength of the main reinforcement with the high compressive strength of concrete, giving the piles good bearing capacity and durability, and are widely used in buildings.

[0003] Due to the deep depth of reinforced concrete piles, multiple prefabricated steel cages are usually used to connect the required length of steel cages. When connecting the steel cages, welding, mechanical connection, binding connection, and mechanical plus welding are usually used. Due to the heavy weight of the steel cage, it deforms during transportation, resulting in irregular angles of the main reinforcement heads. During the welding and mechanical connection process, the main reinforcement heads need to be pre-bent, and then welded or mechanically connected. Due to the large outer diameter of the main reinforcement, pre-bending is difficult and needs to be pre-bent one by one. After the two steel cages are connected, the overall Straightening. Due to the differences between the connections of the main reinforcement heads, the stress distribution between the main reinforcement heads is uneven. In order to achieve the connection between the main reinforcement heads of the steel cage, technical personnel in this field have developed a variety of connectors. During laboratory testing, the two main reinforcement heads can move freely and then quickly cooperate with the connectors to perform strength tests. During on-site use, a support frame (disk) is often required to correct the position of the main reinforcement heads before the connectors can be installed. In most cases, even with the use of a support frame (disk), it is difficult to position the main reinforcement heads, and after the steel cage connection is completed, the support frame (disk) 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 reinforced concrete pile connection structure.

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

[0006] Furthermore, the inner diameter of the connecting pipe is 1-1.5 mm greater than the inner diameter of the fixed pipe.

[0007] Furthermore, the fixed connecting pipe is connected with a blocking structure cooperating with the corresponding main reinforcement head.

[0008] Furthermore, the blocking structure includes a blocking protrusion arranged at the inner end of the fixed pipe, and the blocking protrusion cooperates with the transverse ribs of the threaded steel bar.

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

[0010] Furthermore, an inner connecting piece is provided in the connecting cavity, and two ends of the inner connecting piece are connected to the main reinforcement head.

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

[0012] Furthermore, transverse supporting ribs are connected between the plurality of main rib reinforcement joints.

[0013] The beneficial effects of the present invention are as follows: when a lower steel cage is lowered to the end to be exposed and fixed, an upper steel cage is hoisted so that the ends of the two steel cages are facing each other and the main reinforcement heads are connected, the reinforced concrete pile connection structure provided in this embodiment is used, the main reinforcement joint is mounted on the main reinforcement head of the lower steel cage through a fixed 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 steel cage is extended to exceed the guide opening 1, thereby avoiding interference with the main reinforcement head of the upper steel cage, the upper steel cage is controlled to descend, the ends of the upper steel cage and the lower steel cage are brought close to each other, and then the main reinforcement joints are connected upward to the main reinforcement head of the upper steel cage one by one, so as to facilitate the connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural schematic diagram of Example 1; Figure 2 This is a structural diagram of the second arrangement of support ribs; Figure 3 This is a schematic diagram of the main reinforcement joint structure; Figure 4 This is a schematic diagram of the cross section of the main reinforcement joint; Figure 5 It is a schematic diagram of the blocking protrusion structure; Figure 6 is a schematic diagram of the connecting plate structure; Figure 7 Schematic diagram of the main reinforcement head adjustment tool structure.

[0015] Among them: 1. Main reinforcement joint; 101. Guide port 2; 102. Fixed pipe; 103. Connection cavity; 104. Welding operation hole; 105. Connection pipe; 106. Guide port 1; 107. Connection plate; 108. Blocking protrusion; 2. Support ribs; 301. Connecting arm; 302. Bayonet 1; 303. Bayonet 2; 304. Handle. DETAILED DESCRIPTION

[0016] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0017] The following will be combined with the drawings in the embodiments of the invention to clearly and completely describe the technical solutions in the embodiments of the invention. Obviously, the described embodiments are only part of the embodiments of the invention, not all of the embodiments. Based on the embodiments of the invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the invention.

[0018] Example 1 like Figure 1-6 As shown, a pile connection structure of a reinforced concrete pile is used for a reinforced concrete pile with a main reinforcement outer diameter of 14 mm. The reinforced concrete pile includes a main reinforcement joint 1, and the main reinforcement joint 1 includes a fixing structure and a connecting structure. The fixing structure includes a fixing pipe 102, and the fixing pipe 102 is connected to one of the main reinforcement heads. The connecting structure includes a connecting pipe 105. The fixing pipe 102 and the connecting pipe 105 are coaxial, so that the two reinforcement cages can be aligned, thereby ensuring that the resistance is small during the lowering of the connected reinforcement cage into the pile well. The end of the connecting pipe 105 is integrally formed with a guide port 106, and the guide port 106 is a trumpet-shaped port, so that the main reinforcement head can be guided so that the main reinforcement head can enter the connecting pipe 105.

[0019] A main reinforcement head positioning structure is integrally formed between the connecting pipe 105 and the fixed pipe 102, and the main reinforcement head positioning structure includes a connecting cavity 103, and 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, and the long axis of the connecting cavity 103 is coaxial with the connecting pipe 105. The welding operation hole 104 is an elliptical hole, and the long axis of the welding operation hole 104 is parallel to the long axis of the connecting cavity 103. There are two welding operation holes 104, which are symmetrically distributed on both sides of the connecting cavity 103, so that the main reinforcement head in the connecting hole can be welded. In addition, the welding operation hole 104 also serves as a driving hole for the rotation of the main reinforcement reinforcement joint 1, so as to connect a force rod or a wrench.

[0020] The fixed pipe 102 is connected to a blocking structure that cooperates with the corresponding main reinforcement head. The blocking structure includes a blocking protrusion 108 integrally formed at the inner end of the fixed pipe 102. The blocking protrusion 108 cooperates with the transverse reinforcement of the threaded steel bar. The blocking protrusion 108 is hemispherical and symmetrically distributed on both sides of the inner wall of the fixed pipe 102. The fixed pipe 102 is integrally formed with a guide opening 101. The guide opening 101 is also a trumpet-shaped opening, which can guide the main reinforcement head so that the main reinforcement head can enter the fixed pipe 102. In addition, the guide opening 101 is also used as an operating part. During the on-site construction process, knocking on the outer wall of the guide opening 101 can make the main reinforcement joint 1 vibrate, so that the main reinforcement head can be stably inserted into the fixed pipe 102.

[0021] In this embodiment, the inner diameter of the fixed connecting pipe 102 is 15mm, the length is 30mm, and the wall thickness is 8mm. The maximum inner diameter of the guide port 101 is 18mm. The long axis length of the connecting cavity 103 is 40mm, the short axis length is 25mm, and the wall thickness is 8mm. The inner diameter of the connecting connecting pipe 105 is 16mm, the length is 30mm, and the wall thickness is 8mm. The maximum inner diameter of the guide port 106 is 25mm. The long axis length of the welding operation hole 104 is 25mm, and the short axis length is 20mm. The fixed connecting pipe 102, the guide port 101, the connecting cavity 103, the welding operation hole 104, the connecting connecting pipe 105 and the guide port 1 106 are cast from steel, which is convenient for transportation and has a high degree of fit with the main reinforcement head.

[0022] The end of the fixed pipe 102 is connected to a blocking structure that cooperates with the corresponding main rib head. There are two types of blocking structures. The first type is rigid blocking. Specifically, the blocking structure includes a blocking protrusion 108 integrally formed at the inner end of the fixed pipe 102. The blocking protrusion 108 cooperates with the transverse ribs of the threaded steel bar, thereby rigidly controlling the position between the fixed pipe 102 and the main rib head; the second type is friction blocking. Specifically, the blocking structure includes a friction layer attached to the fixed pipe 102. The friction layer can be a nested rubber layer or can be obtained by curing a smeared polyurethane adhesive.

[0023] An internal connector is installed in the connecting cavity 103, and both ends of the internal connector are connected to the main reinforcement head. Specifically, the internal connector includes a connecting plate 107 with an arc-shaped cross section. The connecting plate 107 has more than two pieces, and 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 reinforcement head. Since the welding operation hole 104 is a long hole, the connecting plate 107 can be inserted into the connecting cavity 103 and then the position can be adjusted. To ensure welding stability, the arc angle of the cross section of the connecting plate 107 is 80-100°, and the length value is 25 mm, thereby ensuring that it can be inserted into the connecting cavity 103.

[0024] During the construction of reinforced concrete piles, a pile well is first drilled, and then a prefabricated steel cage is hoisted and inserted into the pile well. Since the pile well is deep and there are multiple prefabricated steel cages, when a lower steel cage is lowered to the end to be exposed, it is fixed, and an upper steel cage is hoisted so that the ends of the two steel cages are facing each other, and the main reinforcement heads are connected. The pile connection structure of the reinforced concrete pile provided in this embodiment is used, and the main reinforcement joint 1 is mounted on the main reinforcement head of the lower steel cage through a fixed pipe 102. The height of the main reinforcement joint 1 is controlled by a blocking structure so that the upper end of the main reinforcement head of the lower steel cage extends beyond the guide opening 106, thereby avoiding interference with the main reinforcement head of the upper steel cage, and the upper steel cage is controlled to descend so that the ends of the upper steel cage and the lower steel cage are close to each other, and then the main reinforcement joints 1 are moved one by one. The main reinforcement head of the upper steel cage is connected. Due to the position deviation, auxiliary tools are needed to connect in the process. The auxiliary tools include a hammer. The guide port 101 is hammered upward to move the main reinforcement joint 1 upward. During this period, the blocking structure is destroyed. When the lower end of the main reinforcement head of the upper steel cage enters the middle position of the connecting cavity 103, the hammering is stopped. Under normal circumstances, due to the difference in the position of the main reinforcement head of the upper steel cage and the main reinforcement head of the lower steel cage, the main reinforcement joint 1 will not slide down. When operating other main reinforcement joints 1, the disturbance of the upper steel cage causes the main reinforcement joint 1 to have the risk of sliding down. The connecting plate 107 is inserted into the connecting cavity 103 laterally. The end of the connecting plate 107 is supported by the welding operation port to prevent the main reinforcement joint 1 from sliding down. All main reinforcement joints 1 After the adjustment is completed, the upper steel cage is shaken so that the main reinforcement heads of the upper steel cage and the lower steel cage are automatically adjusted to reduce the stress difference after welding and fixation, and then the connecting plates 107 are pulled out one by one, and the main reinforcement heads of the upper steel cage and the lower steel cage are welded through the welding operation hole 104. During this period, the main reinforcement joint 1 can be rotated to ensure the welding area, and due to the limiting effect of the fixed pipe 102 and the connecting pipe 105, the main reinforcement heads of the upper steel cage and the lower steel cage are positioned relative to each other, thereby ensuring the welding effect. After the welding is completed, the connecting plate 107 is inserted through the welding operation hole 104, and the connecting plate 107 is adjusted to make the connecting plate 107 vertical, and then the connecting plate 107 is connected to the main reinforcement heads of the upper steel cage and the lower steel cage. Welding, thereby improving the connection stability between the main reinforcement head of the upper reinforcement cage and the main reinforcement head of the lower reinforcement cage. The welded connecting plate 107 forms an internal connector, thereby improving the tensile strength between the main reinforcement head of the upper reinforcement cage and the main reinforcement head of the lower reinforcement cage. After welding is completed, adjust the angle of the welding operation port, and then weld the transverse support rib 2 between the welding operation ports of the two adjacent main reinforcement reinforcement joints 1. There are two methods for welding the support rib 2. The first is that the welding operation ports of the two adjacent main reinforcement reinforcement joints 1 are directly opposite, and then welded through the arc-shaped support rib 2, and the end of the support rib 2 is inserted into the welding operation port. This welding method has no requirements for the relative height of the main reinforcement joint 1, but it is necessary to intercept the support rib 2. The second is to adjust each welding operation port to the same circumference.The welding operation ports of a single main reinforcement joint 1 are one facing inward and one facing outward, and then welded through two annular support bars 2. After welding, the stability is higher, but multiple adjustments are required. After the support bar 2 is welded, the guide port 106 and the guide port 2 101 are welded to the corresponding main bar head, and the steel cage pile connection is completed. The joint effect of multiple welding points and the effect of the connecting plate 107 make the two steel cages stably connected and the stress distribution is uniform. In addition, due to the supporting effect of the connecting plate 107 and the support bar 2, the deformation of the connection cavity 103 can be prevented.

[0025] In order to quickly adjust the main reinforcement head, a main reinforcement head adjustment tool is also provided, such as Figure 7 As shown, it includes a connecting arm 301, a first end of the connecting arm 301 is connected to a bayonet 1 302 that cooperates with the main reinforcement head, and a second end of the connecting arm 301 is connected to a bayonet 2 303 that cooperates with the main reinforcement head. To prevent the bayonet 1 302 and the bayonet 2 303 from detaching from the main reinforcement head during operation, the bayonet 1 302 and the bayonet 2 303 are in opposite directions, and then clamped with the main reinforcement head from both sides. The second end of the connecting arm 301 is also connected to a handle 304. The connecting arm 301 is a telescopic arm, and then the matching position with the main reinforcement head can be selected. Generally, the farther the distance between the bayonet 1 302 and the bayonet 2 303 is, the better the bending effect of the main reinforcement head. During the test, an attempt was made to use the disc-shaped tool disclosed in the prior art to adjust the main reinforcement head. The test found that after the steel cage has been moved many times, it is very difficult to connect the main reinforcement head with the disc-shaped tool. In most cases, the main reinforcement head adjustment tool provided by the present application is required to be connected to the disc The disc-shaped tool is connected, and then the disc-shaped tool is driven to make multiple main reinforcement heads move simultaneously to control the position between each main reinforcement head. Testing has found that a large force is required to achieve this. A force lever is used for operation, or a hydraulic tool is introduced. The operation is troublesome. After the main reinforcement head position is adjusted, the two steel cages need to be coaxial and rotated at an angle to each other. Then the main reinforcement head of the upper steel cage and the main reinforcement head of the lower steel cage can be connected through the sleeve. The operation cycle is long. After the steel cage is connected, the disc-shaped tool is difficult to be removed, and even some of the disc-shaped tools cannot be removed. After the pile body is cast, the overall structural strength of the pile body is affected. After using the main reinforcement head adjustment tool provided by the present application, it cooperates with the main reinforcement reinforcement joint 1 to make the corresponding two main reinforcement joints quickly docked, and they will not separate after docking. The upper steel cage is shaken, so that the main reinforcement heads of the upper steel cage and the lower steel cage are automatically adjusted to reduce the stress difference after welding and fixation. The operation is convenient and quick.

[0026] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A reinforced concrete pile connection structure, characterized in that: It includes a main reinforcement joint, the main reinforcement joint includes a fixing structure and a connecting structure, the fixing structure includes a fixing pipe, the fixing pipe is connected to one of the main reinforcement heads, the connecting structure includes a connecting pipe, the fixing pipe and the connecting pipe are coaxially arranged, a guide port 1 is arranged at the end of the connecting pipe, a main reinforcement head positioning structure is arranged between the connecting pipe and the fixing pipe, the main reinforcement head positioning structure includes a connecting cavity, and a welding operation hole is arranged on the side wall of the connecting cavity, An inner connecting piece is arranged in the connecting cavity, and the two ends of the inner connecting piece are connected to the main reinforcement head. The inner connecting member comprises a connecting plate with an arc-shaped cross section, and the connecting plate is welded and fixed to the side of the main reinforcement head.

2. The reinforced concrete pile connection structure according to claim 1, characterized in that: The inner diameter of the connecting pipe is 1-1.5 mm greater than the inner diameter of the fixed pipe.

3. The reinforced concrete pile connection structure according to claim 1, characterized in that: The fixed connecting pipe is connected with a blocking structure matched with the corresponding main reinforcement head.

4. The reinforced concrete pile connection structure according to claim 3, characterized in that: The blocking structure comprises a blocking protrusion arranged at the inner end of the fixed pipe, and the blocking protrusion cooperates with the transverse rib of the threaded steel bar.

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

6. The reinforced concrete pile connection structure according to any one of claims 1 to 5, characterized in that: Transverse supporting ribs are connected between the plurality of main rib reinforcement joints.

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