A casing embedding mechanism for rotary bored piles

Abstract

The utility model relates to the technical field of pile foundation construction, and in particular to a casing embedding mechanism for rotary bored cast-in-place piles, comprising a chassis with a placement hole in the center, the top surface of the chassis outside the placement hole being fixedly connected to a top ring and a bottom ring arranged upper and lower and coaxially arranged with the placement hole through a vertical rod, a guide bucket for guiding the bottom of the casing is inserted in the top ring, a mounting ring is inserted in the bottom ring, and a guide cylinder for supporting the casing is integrally connected to the bottom of the mounting ring. The overall structure is simple and can be assembled according to the specifications of the casing, and has a wide range of application scenarios. Moreover, the casing embedding process can be effectively positioned, and the buried casing can be supported and prevented from settling and rotating. This ensures the quality of drilling and piling in the casing in the later stage.

Description

Technical Field

[0001] The utility model relates to the technical field of pile foundation construction, in particular to a casing embedding mechanism for rotary bored cast-in-place piles. Background Art

[0002] The rotary bored pile is formed by pouring concrete into the hole after drilling in situ with a spiral drill or a submersible drill. The overall process has the advantages of low vibration and small soil extrusion stress. In the specific construction work, a steel casing needs to be buried at the designed pile position so that the casing can locate the subsequent rotary drilling hole and effectively protect the hole opening to prevent ground debris from falling into the hole and the hole opening from collapsing.

[0003] Before the casing is buried, a large-diameter drill is used to drill an installation hole in the ground that meets the burial depth. Then the casing is lifted and placed in the installation hole, and the gap between the outer wall of the casing and the installation hole is backfilled. At the same time, the casing needs to be corrected continuously during the process of lowering it into the installation hole. Especially when the casing is long, the position needs to be adjusted manually during the lifting process. Once the casing is buried at an angle, it will cause a deviation between the later drilling hole position and the designed pile position, and the drill bit is prone to collide with the casing. Therefore, it is necessary to provide a new casing burying mechanism for rotary bored piles to solve the above technical problems. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a casing embedding mechanism for rotary bored piles. The utility model has a simple overall structure and can be assembled according to casing specifications, and has a wide range of application scenarios. It can effectively position the casing embedding process, and at the same time support the embedded casing and prevent it from settling and rotating, thereby ensuring the quality of drilling holes and pile formation in the casing in the later stage.

[0005] The utility model provides a casing embedding mechanism for rotary bored cast-in-place piles, comprising a chassis with a placement hole in the center, the top surface of the chassis outside the placement hole being fixedly connected to a top ring and a bottom ring arranged upper and lower and coaxially arranged with the placement hole through a vertical rod, a guide bucket for guiding the bottom of the casing is inserted in the top ring, a mounting ring is inserted in the bottom ring, and a guide cylinder for supporting the casing is integrally connected to the bottom of the mounting ring.

[0006] Preferably, the mechanism further comprises a plurality of arc-shaped baffles, which are arranged at equal intervals on the outer wall of the top of the casing and connected to the casing by bolts, and a baffle rod is integrally fixed on the side of the arc-shaped baffle away from the casing;

[0007] The top surface of the mounting ring is provided with a plurality of slots for inserting and mating the gear lever.

[0008] After the arc-shaped baffle and the casing are connected, the casing can be lifted by a lifting device. The utility model can support the guide bucket and the guide tube respectively by setting the top ring and the bottom ring, so that the center of the guide bucket and the guide tube can be on the same vertical line as the center of the installation hole for burying the casing. Since the guide bucket is a cone structure designed to match the casing, the casing can be effectively limited and guided during the lifting process to ensure the verticality of the casing installation. At the same time, the auxiliary guidance of the guide tube and the later support can fully ensure the quality of the casing burying operation.

[0009] The slot is designed to position and support the casing. That is, after the casing is buried in place, the bottom ring and the mounting ring are used to support the casing to prevent the casing from sinking and failing to effectively protect the hole due to vibration during the subsequent rotary drill construction, ensuring that the top of the casing is above the ground and cannot rotate.

[0010] Preferably, the guide bucket is a conical cylindrical structure with the large end surface facing upward, and a flange is integrally provided on the outer edge of the large end surface, and a plurality of axially extending first insertion rods are fixed on the bottom surface of the flange;

[0011] The top ring body is provided with a plurality of first insertion holes for inserting the first insertion rods, and the top surface of the top ring is provided with a plurality of lifting rings.

[0012] Preferably, a notch is provided on the wall of the guide bucket at the position corresponding to the stopper rod, and a connecting ring is fixed on the flange top surface of the guide bucket. The notch on the guide bucket can allow the stopper rod to pass over when the casing is suspended, and also plays the role of preliminary positioning of the casing.

[0013] Preferably, a plurality of axially extending second insertion rods are fixedly arranged on the bottom surface of the mounting ring;

[0014] The bottom ring body is provided with a plurality of second insertion holes for inserting the second insertion rods.

[0015] Because the overall volume of the utility model is relatively large (the casing itself has a large diameter, so the utility model as the positioning embedded part of the casing is also relatively large), the lifting ring is set on the top ring and the connecting ring is set on the guide bucket to facilitate the lifting of the corresponding components. At the same time, the assembly method of the plug rod and the socket is to facilitate the positioning and assembly of the corresponding components on the one hand, and to combine the components on the other hand, so as to facilitate the selection of the corresponding specifications of the guide bucket and the installation ring for casings of different diameters, thereby expanding the application scenarios of the utility model.

[0016] Preferably, the chassis is provided with a plurality of third plug holes which are circumferentially evenly spaced, the third plug holes are mated with the third plug rods, and the top of the third plug rod is connected to the mounting ring via a connecting piece.

[0017] The third insertion rod is provided so that after the chassis of the utility model is installed in place, the third insertion rod can be inserted into the soil to position the chassis, and then the subsequent guide bucket and installation ring and other components can be installed. When dismantling later, the third insertion rod can be connected to the installation hanging ring by a crane and pulled out of the ground without manual work.

[0018] Compared with the related art, the casing embedding mechanism provided by the utility model has a simple overall structure and can be assembled according to the casing specifications, with a wide range of application scenarios. It can also effectively position the casing embedding process, and at the same time support the buried casing and prevent it from settling and rotating, thereby ensuring the quality of drilling holes and pile formation in the casing in the later stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A structural schematic diagram of a preferred embodiment of a casing embedding mechanism for rotary bored piles provided by the utility model;

[0020] Figure 2 for Figure 1 A schematic diagram of the structure of the chassis and its components shown;

[0021] Figure 3 for Figure 1 The structural schematic diagram of the guide bucket shown;

[0022] Figure 4 for Figure 1 A schematic diagram of the structure of the mounting ring and its components shown;

[0023] Figure 5 for Figure 1 A schematic structural diagram of the third plug rod and its components is shown. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0025] The specific implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0026] See also Figures 1 to 5 A casing embedding mechanism for rotary bored piles, comprising a chassis 1 with a placement hole 12 in the center, and a plurality of arc-shaped baffles 6, which are arranged at equal intervals on the outer wall of the top of the casing and connected to the casing by bolts, and a baffle rod 61 is integrally fixed on the side of the arc-shaped baffle 6 away from the casing;

[0027] The top surface of the chassis 1 outside the placement hole 12 is fixedly connected to the top ring 21 and the bottom ring 23 which are arranged upper and lower and coaxially arranged with the placement hole 12 through the vertical rod 2, and the top ring 21 is inserted with a guide bucket 3 for guiding the bottom of the casing, and the bottom ring 23 is inserted with a mounting ring 5, and the bottom of the mounting ring 5 is integrally connected with a guide cylinder 53 for supporting the casing, and the top surface of the mounting ring 5 is provided with a plurality of slots 51 for plugging in the gear lever 61.

[0028] The guide bucket 3 is a conical structure with the large end face facing upward and a flange is integrally provided on the outer edge of the large end face. A notch 33 is provided on the bucket wall of the guide bucket 3 at the corresponding position of the gear rod 61, and a connecting ring 32 is fixedly provided on the top surface of the flange of the guide bucket 3, and several axially extending first plug rods 31 are fixedly provided on the bottom surface of the flange; several first insertion holes 211 for plugging the first plug rods 31 are provided on the ring body of the top ring 21, and several lifting rings 22 are provided on the top surface of the top ring 21.

[0029] A plurality of axially extending second insertion rods 52 are fixedly disposed on the bottom surface of the mounting ring 5 , and a plurality of second insertion holes 231 for inserting the second insertion rods 52 are disposed on the ring body of the bottom ring 23 .

[0030] The chassis 1 is provided with a plurality of third plug holes 11 which are evenly spaced in the circumferential direction. The third plug holes 11 are plugged with the third plug rods 4 , and the top of the third plug rod 4 is connected to the mounting ring 42 via a connecting piece 41 .

[0031] The working principle of the casing embedding mechanism for rotary excavation cast-in-place piles provided by the utility model is as follows:

[0032] First, a mounting hole that is relatively compatible with the specifications of the casing is drilled at the designed pile position, and the top ring 21 and the chassis 1 are lifted to the mounting hole for installation by using the lifting ring 22 connected to the top ring 21 by a crane. At the same time, the third insertion rod 4 is inserted into the ground after passing through the third insertion hole 11 to position the chassis.

[0033] Then, the mounting ring 5 is passed through the top ring 21 and crimped onto the bottom ring 23, and the second plug rod 52 and the second socket 231 are plugged in to complete the installation of the mounting ring 5 and the guide cylinder 53; then, the connecting hanging ring 32 of the guide bucket is connected by a crane and the guide bucket 3 is installed on the top ring 21, and the installation is completed by plugging the first plug rod 31 and the first socket 211.

[0034] Finally, after the arc-shaped baffle 6 and the casing are connected, the casing can be hoisted by a crane. After the casing passes through the guide bucket 3 and the guide tube 53 in sequence, the stop rod 61 is pressed in the card slot 51 to complete the buried installation of the casing.

[0035] The utility model can support the guide bucket 3 and the guide cylinder 53 respectively by setting the top ring 21 and the bottom ring 23, so that the center of the guide bucket 3 and the guide cylinder 53 can be on the same vertical line as the center of the installation hole for burying the casing. Since the guide bucket 3 is a cone structure designed to match the casing, the casing can be effectively limited and guided during the hanging process to ensure the verticality of the casing installation. At the same time, the auxiliary guidance and later support of the guide cylinder 53 can fully ensure the quality of the casing burying operation. The design of the card slot 51 is used to position and support the casing, that is, after the casing is buried in place, the gear lever 61 is pressed in the card slot 51. On the one hand, the bottom ring 23 cooperates with the installation ring 5 to support the casing, ensuring that the top of the casing is higher than the ground and preventing the casing from settling due to vibration during the later rotary drill construction and failing to protect the hole. On the other hand, the card slot 51 can prevent the casing from turning around.

[0036] The above are only embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A casing embedding mechanism for rotary bored piles, characterized in that: The invention comprises a chassis (1) with a placement hole (12) at the center, the top surface of the chassis (1) outside the placement hole (12) being fixedly connected to a top ring (21) and a bottom ring (23) arranged in an upper and lower direction and coaxially arranged with the placement hole (12) through a vertical rod (2), the top ring (21) being provided with a guide bucket (3) for guiding the bottom of the casing, the bottom ring (23) being provided with a mounting ring (5), the bottom of the mounting ring (5) being integrally connected with a guide cylinder (53) for supporting the casing.

2. The casing embedding mechanism for rotary bored pile according to claim 1, characterized in that: The mechanism further comprises a plurality of arc-shaped baffles (6), which are arranged at equal intervals on the outer wall of the top of the casing and connected to the casing via bolts, and a baffle rod (61) is integrally fixedly provided on the side of the arc-shaped baffle (6) away from the casing; The top surface of the mounting ring (5) is provided with a plurality of slots (51) for inserting and mating the shift rod (61).

3. The casing embedding mechanism for rotary bored pile according to claim 2, characterized in that: The guide bucket (3) is in the form of a conical cylinder with a large end surface facing upwards, and a flange is integrally provided on the outer edge of the large end surface, and a plurality of axially extending first insertion rods (31) are fixedly provided on the bottom surface of the flange; The top ring (21) is provided with a plurality of first insertion holes (211) for inserting the first insertion rod (31) on its ring body, and a plurality of lifting rings (22) are provided on the top surface of the top ring (21).

4. The casing embedding mechanism for rotary bored pile according to claim 3, characterized in that: A notch (33) is provided on the bucket wall of the guide bucket (3) at a position corresponding to the shift rod (61), and a connecting ring (32) is fixedly provided on the flange top surface of the guide bucket (3).

5. The casing embedding mechanism for rotary bored pile according to claim 2, characterized in that: A plurality of axially extending second insertion rods (52) are fixedly arranged on the bottom surface of the mounting ring (5); The bottom ring (23) is provided with a plurality of second insertion holes (231) for inserting the second insertion rods (52).

6. The casing embedding mechanism for rotary bored pile according to claim 1, characterized in that: The chassis (1) is provided with a plurality of third plug holes (11) which are circumferentially evenly spaced, the third plug holes (11) are mated with the third plug rods (4), and the top of the third plug rods (4) is connected to the mounting ring (42) via a connecting piece (41).

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