Prefabricated pipe pile end-plate-free mechanical connecting mechanism and construction method thereof

Abstract

The invention discloses a prefabricated pipe pile end-plate-free mechanical connecting mechanism and a construction method thereof, and relates to the technical field of constructional engineering, the prefabricated pipe pile end-plate-free mechanical connecting mechanism comprises a first outer sleeve and a second outer sleeve which are pre-buried in the ends of two prefabricated pipe piles; the first inner barrel sleeve is in threaded connection fit with the first outer barrel sleeve, one end of the first inner barrel sleeve is fixedly connected with a plurality of arc-shaped elastic plates distributed in a circumferential array mode, a cylindrical limiting inserting groove is defined by the arc-shaped elastic plates, and an annular tooth groove set is formed in the inner wall of the limiting inserting groove; the second inner cylinder sleeve is in threaded connection fit with the second outer cylinder sleeve; on one hand, compared with welding of the two prefabricated pipe piles, connection of the two prefabricated pipe piles can be achieved in an inserting and clamping mode under the condition that sparks and gas are not generated, and the environment is effectively protected; and on the other hand, compared with the mode that the belt end plates are connected through a plurality of bolts, connection of the two prefabricated pipe piles is achieved in an inserting and clamping mode, and the connecting efficiency of the prefabricated pipe piles is improved.

Description

Technical Field

[0001] The invention relates to the technical field of construction engineering, in particular to a prefabricated pipe pile end plate-free mechanical connection mechanism and a construction method thereof. Background Art

[0002] Prefabricated pipe piles are reinforced concrete structures with a circular cross-section. Due to their low cost, light weight, and easy lifting and transportation, they are widely used in the foundation engineering of modern buildings, especially for buildings built on unstable or soft soil layers.

[0003] Traditional prefabricated pipe pile connections are mostly made by welding or bolting with end plates. Although welding connections have high connection strength, they have problems such as low construction efficiency, difficulty in ensuring welding quality, and generation of harmful gases and sparks during welding, which pose a threat to the environment and the health of construction workers. Although bolting with end plates is relatively convenient to construct, the use of end plates increases material costs, and under certain special geological conditions, end plates are prone to damage, affecting connection reliability. Therefore, it is of great significance to propose a mechanical connection mechanism for prefabricated pipe piles. Summary of the invention

[0004] The object of the present invention is to provide a prefabricated pipe pile end plate-free mechanical connection mechanism and a construction method thereof, so as to solve the deficiencies in the above-mentioned prior art.

[0005] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a mechanical connection mechanism for prefabricated pipe piles without end plates, comprising: a first outer sleeve and a second outer sleeve, which are pre-buried in the ends of two prefabricated pipe piles; a first inner sleeve, which is threadedly matched with the first outer sleeve, and one end of the first inner sleeve is fixedly connected to a plurality of arc-shaped elastic plates distributed in a circular array, each arc-shaped elastic plate encloses a cylindrical limiting slot, and an annular tooth groove group is provided on the inner wall of the limiting slot; a second inner sleeve, which is threadedly matched with the second outer sleeve, and one end of the second inner sleeve is fixedly connected to a plug rod, and a tooth group is provided on the peripheral side of the plug rod; when the ends of the two prefabricated pipe piles are butt-jointed, the plug rod is stretched open after passing through the first inner sleeve and inserted into the limiting slot, so that the tooth group is snap-fitted with the annular tooth groove group.

[0006] Furthermore, a limiting assembly is provided between the first inner sleeve and the first outer sleeve, and the limiting assembly includes: a limiting ring, which is slidably connected to the first outer sleeve along the axial direction of the first outer sleeve, and has the following sliding strokes: a first position, aligned with an end of the limiting slot close to the first inner sleeve; a second position, aligned with an end of the limiting slot away from the first inner sleeve; a trigger rod, which is slidably connected to the first outer sleeve along the radial direction of the first outer sleeve, and has a blocking position in the sliding stroke that blocks the movement path of the limiting ring; when the insertion rod is inserted into the limiting slot and abuts against the wedge block on the trigger rod, the insertion rod drives the trigger rod to disengage from the blocking position, and the first elastic member provided on the first outer sleeve drives the limiting ring to slide from the first position to the second position.

[0007] Furthermore, the first elastic member includes a tension spring, one end of the tension spring is connected to the limiting ring, and the other end of the tension spring is connected to the first outer sleeve.

[0008] Furthermore, the second inner sleeve is provided with a plurality of elastic buckles distributed in a circular array, and the first inner sleeve is provided with buckle grooves which match the buckles one by one.

[0009] Furthermore, a clamping clamp is provided in the first outer sleeve, and the clamping clamp includes an arc-shaped abutment plate and a second elastic member. The abutment plate is connected to the first outer sleeve along the radial sliding direction of the first outer sleeve, and a chamfer is provided on the abutment plate. The elastic force of the second elastic member drives the abutment plate to abut against the limit pin.

[0010] Furthermore, the second elastic member comprises a spring, one end of the spring is connected to the inner wall of the first outer sleeve, and the other end of the spring is connected to the abutment plate.

[0011] Furthermore, the first outer sleeve and the second outer sleeve are fixedly connected to the steel cages in the two prefabricated pipe piles.

[0012] The present invention also provides a construction method, which is implemented based on a prefabricated pipe pile end plate-free mechanical connection mechanism, and includes the following steps: S1, pre-embedding the first outer sleeve and the second outer sleeve in two prefabricated pipe piles respectively; S2, screwing the first inner sleeve into the first outer sleeve, and screwing the second inner sleeve into the second outer sleeve respectively; S3, inserting the insertion rod on the second outer sleeve into the first inner sleeve until all the tooth groups on the insertion rod are matched with the annular tooth groove groups on the limiting slot, thereby completing the connection of the two prefabricated pipe piles.

[0013] In the above technical scheme, the present invention provides a prefabricated pipe pile end plate-free mechanical connection mechanism and a construction method thereof. First, the first outer sleeve and the second outer sleeve are respectively embedded in the two prefabricated pipe piles, and then the first inner sleeve is screwed into the first outer sleeve, and the second inner sleeve is screwed into the second outer sleeve, so that the first outer sleeve and the second outer sleeve are aligned, and the prefabricated pipe pile where the second outer sleeve is located is slowly moved so that the insertion rod on the second inner sleeve is slowly inserted into the first inner sleeve, and the insertion rod enters the limit pin after passing through the first inner sleeve, and each tooth on the insertion rod cooperates with the annular tooth groove group, so that each arc elastic plate switches between the open and closed states. Until the last tooth cooperates with the tooth groove, each arc elastic plate is in a closed state, and the ends of the first outer sleeve and the second outer sleeve are butted, completing the connection work of the two prefabricated pipe piles.

[0014] On the one hand, compared with welding two prefabricated pipe piles, the present invention can achieve the connection of two prefabricated pipe piles by plugging and snapping without generating sparks and gases, thereby effectively protecting the environment; on the other hand, compared with using end plates connected by multiple bolts, the present invention achieves the connection of two prefabricated pipe piles by plugging and snapping, thereby improving the connection efficiency of the prefabricated pipe piles. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0016] Figure 1 A schematic diagram of the structure of the first inner sleeve and the limiting slot provided in an embodiment of the present invention; Figure 2 A schematic diagram of the threaded connection structure between the second outer sleeve and the second inner sleeve provided in an embodiment of the present invention; Figure 3 A schematic structural diagram of a limit ring provided in an embodiment of the present invention when it is in a first position; Figure 4 A schematic diagram of the structure of the trigger rod abutting against the limit ring provided by an embodiment of the present invention; Figure 5 A schematic structural diagram of a process in which a limit ring provided in an embodiment of the present invention slides from a first position to a second position; Figure 6 A schematic diagram of the structure of two prefabricated pipe piles connected according to an embodiment of the present invention; Figure 7 The embodiment of the present invention provides Figure 6 The enlarged structural diagram at A in the middle; Figure 8A schematic diagram of the first inner sleeve and the clamping hoop structure provided in an embodiment of the present invention; Fig. 9 A schematic diagram of the working state structure of the clamping clamp provided in an embodiment of the present invention.

[0017] Description of reference numerals: 1. First outer sleeve; 11. First inner sleeve; 111. Slot; 2. Second outer sleeve; 21. Second inner sleeve; 211. Buckle; 3. Limiting slot; 31. Arc elastic plate; 32. Annular tooth groove group; 4. Insert rod; 41. Tooth group; 5. Limiting ring; 6. Trigger rod; 61. Wedge block; 7. First elastic member; 8. Clamping clamp; 81. Butt plate; 82. Second elastic member; 9. Prefabricated pipe pile; 91. Steel cage. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0019] See also Figure 1-9 The embodiment of the present invention provides a prefabricated pipe pile end plate-free mechanical connection mechanism, comprising a first outer sleeve 1 and a second outer sleeve 2, a first inner sleeve 11 and a second inner sleeve 21, wherein the first outer sleeve 1 and the second outer sleeve 2 are pre-buried in the ends of two prefabricated pipe piles 9, and specifically, the first outer sleeve 1 and the second outer sleeve 2 are fixedly connected to the steel cage 91 in the two prefabricated pipe piles 9; the first inner sleeve 11 is threadedly matched with the first outer sleeve 1, and one end of the first inner sleeve 11 is fixedly connected with a plurality of steel cages distributed in a circumferential array. The arc-shaped elastic plates 31 are enclosed to form a cylindrical limiting slot 3, and an annular tooth groove group 32 is provided on the inner wall of the limiting slot 3; the second inner sleeve 21 is threadedly matched with the second outer sleeve 2, and one end of the second inner sleeve 21 is fixedly connected with a plug rod 4, and a tooth group 41 is provided on the peripheral side of the plug rod 4; when the ends of the two prefabricated pipe piles 9 are butt-jointed, the plug rod 4 passes through the first inner sleeve 11 and then stretches open and is inserted into the limiting slot 3, so that the tooth group 41 is engaged with the annular tooth groove group 32.

[0020] A limiting assembly is arranged between the first inner sleeve 11 and the first outer sleeve 1, and the limiting assembly comprises: a limiting ring 5 and a trigger rod 6. The limiting ring 5 is connected to the first outer sleeve 1 in an axial sliding manner. The limiting ring 5 has a first position and a second position in a sliding stroke relative to the first outer sleeve 1. The first position is aligned with an end of the limiting slot 3 close to the first inner sleeve 11; the second position is aligned with an end of the limiting slot 3 away from the first inner sleeve 11; the trigger rod 6 is connected to the first outer sleeve 1 in a radial sliding manner. Inside the tube sleeve 1, the trigger rod 6 has a blocking position in the sliding stroke relative to the first outer tube sleeve 1, which blocks the movement path of the limit ring 5; when the insertion rod 4 is inserted into the limit slot 3 and abuts against the wedge block 61 on the trigger rod 6, the insertion rod 4 drives the trigger rod 6 to disengage from the blocking position, and the first elastic member 7 provided on the first outer tube sleeve 1 drives the limit ring 5 to slide from the first position to the second position. Specifically, the first elastic member 7 includes a tension spring, one end of the tension spring is connected to the limit ring 5, and the other end of the tension spring is connected to the first outer tube sleeve 1.

[0021] In the above technical scheme, the first outer sleeve 1 and the second outer sleeve 2 are firstly embedded in two prefabricated pipe piles 9 respectively, and then the first inner sleeve 11 is screwed into the first outer sleeve 1, and the second inner sleeve 21 is screwed into the second outer sleeve 2, so that the first outer sleeve 1 and the second outer sleeve 2 are aligned, and the prefabricated pipe pile 9 where the second outer sleeve 2 is located is slowly moved, so that the insertion rod 4 on the second inner sleeve 21 is slowly inserted into the first inner sleeve 11, and the insertion rod 4 enters the limiting latch after passing through the first inner sleeve 11, and the tooth group 41 on the insertion rod 4 cooperates with the annular tooth groove group 32 of the limiting slot 3, so that each elastic arc plate repeats in the open and closed state until the last tooth is matched with the tooth groove, and each elastic arc plate stops in the closed state. In the process of the last few teeth and tooth grooves matching, the insertion rod 4 begins to abut against the wedge block 61, so that the wedge block 61 can slide along the radial direction of the first outer sleeve 1. When the last tooth completes the cooperation with the tooth groove, the insertion rod 4 also completes the abutment against the wedge block 61, so that the trigger rod 6 fixedly connected to the wedge block 61 is away from the blocking position, that is, the trigger rod 6 is no longer abutted against the limiting ring 5. At this time, the tension spring begins to recover its deformation, thereby sliding from the first position to the second position. After the limiting ring 5 slides to the second position, it is restricted by the sliding groove so that the limiting ring 5 cannot continue to slide, and then the limiting ring 5 limits each annular elastic plate so that it can no longer open. In the sliding process of the limiting ring 5, the limiting rod acts to make the limiting ring 5 slide smoothly, and the ends of the first outer sleeve 1 and the second outer sleeve 2 are butted, completing the connection work of the two prefabricated pipe piles 9.

[0022] On the one hand, compared with welding two prefabricated pipe piles 9, the present invention can achieve the connection of two prefabricated pipe piles 9 by plugging and snapping without generating sparks and gases, thereby effectively protecting the environment; on the other hand, compared with using end plates connected by multiple bolts, the present invention achieves the connection of two prefabricated pipe piles 9 by plugging and snapping, thereby improving the connection efficiency of the prefabricated pipe piles 9.

[0023] Among them, the second inner sleeve 21 is provided with a plurality of elastic buckles 211 distributed in a circumferential array, and the first inner sleeve 11 is provided with a groove 111 that matches the buckle 211 one by one. When the second inner sleeve 21 is inserted into the first inner sleeve 11, the buckle 211 is first in a pressed state. When the first outer sleeve 1 and the second outer sleeve 2 are abutted, the buckle 211 also enters the groove 111, and the buckle 211 is in an open state. The buckle 211 is limited by the groove 111 and cannot move anymore, thereby enhancing the stability of the connection between the first inner sleeve 11 and the second inner sleeve.

[0024] In another embodiment provided by the present invention, Figure 8 , Fig. 9 A clamping hoop 8 is provided in the first outer sleeve 1, and the clamping hoop 8 includes an arc-shaped abutment plate 81 and a second elastic member 82. Specifically, the second elastic member 82 includes a spring, one end of which is connected to the inner wall of the first outer sleeve 1, and the other end is connected to the abutment plate 81. The abutment plate 81 is connected to the first outer sleeve 1 in a radially sliding manner. A chamfer is provided on the abutment plate 81, and the elastic force of the second elastic member 82 drives the abutment plate 81 to abut against the limit pin.

[0025] The first outer sleeve 1 and the second outer sleeve 2 are respectively embedded in the two prefabricated pipe piles 9, and then the first inner sleeve 11 and the second inner sleeve 21 are respectively screwed into the first outer sleeve 1 and the second outer sleeve 2, and then the first prefabricated pipe pile 9 is first placed in a vertical state, and the other prefabricated pipe pile 9 is lifted and aligned with the prefabricated pipe pile 9 in the vertical state, and then the insertion rod 4 is slowly inserted into the first inner sleeve 11. After the insertion rod 4 enters the limiting slot 3, the tooth group 41 on the insertion rod 4 begins to cooperate with the annular tooth groove group 32 During the process of expanding each elastic arc plate, each spring drives the abutment plate 81 to abut against the elastic arc plate to prevent it from opening. However, the gravity of the prefabricated pipe pile 9 is too large to overcome the abutment force of the abutment plate 81, so that the insertion rod 4 can still be inserted into the limiting slot 3 until each tooth completes the cooperation with each tooth groove. When the two prefabricated pipe piles 9 are connected, the abutment plate 81 is subjected to the elastic force of the spring to abut against the elastic arc plate to prevent the elastic arc plate from opening. When there is no large force, it can effectively limit the elastic arc plate.

[0026] The present invention also provides a construction method, which is implemented based on a prefabricated pipe pile end plate-free mechanical connection mechanism, and includes the following steps: S1, pre-embedding the first outer sleeve 1 and the second outer sleeve 2 in two prefabricated pipe piles 9 respectively; S2, screwing the first inner sleeve 11 into the first outer sleeve 1, and screwing the second inner sleeve 21 into the second outer sleeve 2 respectively; S3, inserting the insertion rod 4 on the second outer sleeve 2 into the first inner sleeve 11, until all the tooth groups 41 on the insertion rod 4 are matched with the annular tooth groove group 32 on the limiting slot 3, thereby completing the connection of the two prefabricated pipe piles 9.

[0027] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A mechanical connection mechanism for prefabricated pipe piles without end plates, characterized in that: include: A first outer sleeve and a second outer sleeve are respectively embedded in the ends of the two prefabricated pipe piles; A first inner sleeve, which is threadedly engaged with the first outer sleeve, one end of which is fixedly connected with a plurality of arc-shaped elastic plates distributed in a circumferential array, each arc-shaped elastic plate encloses a cylindrical limiting slot, and an annular tooth groove group is provided on the inner wall of the limiting slot; A second inner sleeve is threadedly connected with the second outer sleeve, one end of the second inner sleeve is fixedly connected to an insertion rod, and a tooth group is arranged on the peripheral side of the insertion rod; When the ends of two prefabricated pipe piles are butted, the insertion rod passes through the first inner sleeve and then stretches out and is inserted into the limiting slot, so that the tooth set is engaged with the annular tooth groove set.

2. The prefabricated pipe pile end plate-free mechanical connection mechanism according to claim 1, characterized in that: A limit assembly is provided between the first inner sleeve and the first outer sleeve, and the limit assembly comprises: The limiting ring is connected to the first outer sleeve by sliding along the axial direction of the first outer sleeve, and has a first position in which the limiting slot is aligned with one end close to the first inner sleeve; and a second position in which the limiting slot is aligned with one end away from the first inner sleeve. A trigger rod is slidably connected to the first outer sleeve in a radial direction of the first outer sleeve, and has a blocking position in its sliding stroke to block the movement path of the limit ring; When the insertion rod is inserted into the limiting slot and abuts against the wedge block on the trigger rod, the insertion rod drives the trigger rod to disengage from the blocking position, and the first elastic member arranged on the first outer sleeve drives the limiting ring to slide from the first position to the second position.

3. The prefabricated pipe pile end plate-free mechanical connection mechanism according to claim 2, characterized in that: The first elastic member comprises a tension spring, one end of which is connected to the limiting ring, and the other end of which is connected to the first outer sleeve.

4. The prefabricated pipe pile end plate-free mechanical connection mechanism according to claim 1, characterized in that: The second inner sleeve is provided with a plurality of elastic buckles distributed in a circumferential array, and the first inner sleeve is provided with a clamping groove which matches the buckles one by one.

5. The prefabricated pipe pile end plate-free mechanical connection mechanism according to claim 1, characterized in that: A clamping clamp is arranged in the first outer sleeve, and the clamping clamp includes an arc-shaped abutment plate and a second elastic member. The abutment plate is connected to the first outer sleeve along the radial sliding direction of the first outer sleeve, and a chamfer is provided on the abutment plate. The elastic force of the second elastic member drives the abutment plate to abut against the limit pin.

6. The prefabricated pipe pile end plate-free mechanical connection mechanism according to claim 5, characterized in that: The second elastic member comprises a spring, one end of which is connected to the inner wall of the first outer sleeve, and the other end of which is connected to the abutment plate.

7. The prefabricated pipe pile end plate-free mechanical connection mechanism according to claim 1, characterized in that: The first outer sleeve and the second outer sleeve are fixedly connected to the steel cages in the two prefabricated pipe piles.

8. A construction method, implemented based on a prefabricated pipe pile without end plate mechanical connection mechanism according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1, pre-embedding the first outer sleeve and the second outer sleeve in two prefabricated pipe piles respectively; S2, respectively screwing the first inner sleeve into the first outer sleeve, and screwing the second inner sleeve into the second outer sleeve; S3, inserting the insertion rod on the second outer sleeve into the first inner sleeve until all the tooth groups on the insertion rod are matched with the annular tooth groove groups on the limiting slot, thereby completing the connection of the two prefabricated pipe piles.

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