Soft soil layer cast-in-situ bored pile construction structure

Abstract

A soft soil layer cast-in-situ bored pile construction structure comprises a main drill rod and a drill bit rod arranged at the lower end of the main drill rod, and the main drill rod and the drill bit rod are connected through a sealing connecting ring. The construction structure further comprises a mounting ring arranged on the outer side of the outer ring face of the side, close to the drill bit rod, of the sealing connecting ring, a cutting plate arranged at the lower end of the mounting ring and connected with the drill bit rod, and a fixing ring arranged at the upper end of the sealing connecting ring. The two ends of the protective sleeve are connected with the fixing ring and the mounting ring respectively, and the outer diameter of the protective sleeve is gradually enlarged from top to bottom. By arranging the mounting ring, the cutting plate, the fixing ring and the protective sleeve, on the basis that the drill bit can be detached and cleaned, a route for guiding soft soil from the drill bit to the spiral blade is formed, accumulation of the soft soil is reduced, and the drilling effect is improved; and meanwhile, the surface of the whole device is smooth, no soft soil adhesion joints exist, and the easy-to-clean effect of the device is further improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of concrete pouring, and in particular relates to a soft soil layer bored cast-in-place pile construction structure. Background Art

[0002] When the natural foundation cannot meet the upper load requirements and simple artificial treatment cannot meet them either, the main method of high-rise building construction today is to use a bored pile construction device to construct a pile foundation under the bottom layer and use the pile body to transmit the load force to a deeper stratum that can meet the bearing requirements. Construction under soft soil foundation conditions is more difficult and requires the use of long spiral bored piles to treat the soft soil foundation first. Construction can only be carried out after the stability of the soft soil foundation is improved through consolidation.

[0003] Since the lower soil of soft soil foundation is relatively loose, it is easy to drill holes, but it is difficult to maintain the diameter of the holes that have been drilled. Therefore, the long spiral bored pile construction of soft soil foundation generally uses a long spiral drill to drill holes, and uses its spiral blade structure to take soil. When the main shaft drives the spiral blade to the required depth of the bored pile construction, concrete is poured through the concrete channel in the main shaft while controlling the main shaft to rise to take out the remaining soil. Most of the existing drill bits are welded one-piece structures, and soft soil usually has a large viscosity, which will adhere to the drill bit and is not easy to clean, affecting subsequent use.

[0004] Prior art, such as the document with authorization announcement number CN220451789U, discloses a drill bit for bored piles in soft soil, wherein a sealing cover is installed between the drill bit mounting seat and the main drill rod, and a secondary drill rod is installed at the lower end of the main drill rod; a horizontal ring is mounted on the outside of the main drill rod, and a fixing hoop is mounted on the outside of the secondary drill rod; bearing blocks are mounted around the inner wall of the horizontal ring, and fixing blocks are mounted around the outer wall of the main drill rod; the positions of the bearing blocks and the fixing blocks correspond one to one, and a support rod is installed between the bearing blocks and the fixing blocks; three connecting handles are installed on the outer wall of the fixing hoop, and the end of each connecting handle is connected to the horizontal ring, and cutting teeth are evenly installed on the outer wall of the connecting handle; a hinge groove is provided on the side wall of the bearing block, and a limiting groove is provided on the side wall of the fixing block, one end of the support rod is hinged in the hinge groove, and the other end of the support rod is clamped in the limiting groove.

[0005] The working principle of the above structure is: through a horizontal ring set outside the drill pipe, a connecting handle and a support rod are set on the horizontal ring, and they are connected by a fixed hoop and a hinge mechanism, so as to complete the disassembly between the drill bit and the main drill pipe, which is convenient for cleaning soft soil.

[0006] However, the device still has the following problems: the widened horizontal ring will block the soft soil from moving to the spiral blades of the main drill pipe, affecting the soft soil being brought out from deep by the spiral blades. Utility Model Content

[0007] In view of the above-mentioned problems, the purpose of the utility model is to provide a construction structure for bored piles in soft soil layers. By arranging a mounting ring, a cutting plate, a fixing ring and a protective sleeve, the device, on the basis of the detachable cleaning of the drill bit, forms a route for guiding the soft soil from the drill bit to the spiral blade, thereby reducing the accumulation of soft soil and improving the drilling effect. At the same time, the surface of the entire device is flat, and there are no nodes where soft soil adheres, which further improves the easy cleaning effect of the device.

[0008] In order to achieve the above purpose, the technical solution of the utility model is as follows:

[0009] A construction structure for bored piles in soft soil, comprising a main drill rod and a drill bit rod arranged at the lower end of the main drill rod, wherein the main drill rod and the drill bit rod are connected via a sealing connection ring, and the construction structure further comprises a mounting ring arranged on the outer side of an outer ring surface of the sealing connection ring close to the drill bit rod, a cutting plate arranged at the lower end of the mounting ring and connected to the drill bit rod, a fixing ring arranged at the upper end of the sealing connection ring, and a protective sleeve whose two ends are respectively connected to the fixing ring and the mounting ring and whose outer diameter gradually increases from top to bottom.

[0010] As a further preferred embodiment of the present invention, a first hinge structure is provided at one end of the cutting plate to be connected to the drill rod, and a second hinge structure is provided at the other end of the cutting plate to be connected to the mounting ring.

[0011] As a further preferred embodiment of the present invention, the first hinged structure includes an annular groove arranged on the outer annular surface of the drill bit rod, a ring body embedded in the annular groove, a side groove arranged on the outer side wall of the ring body, and a first mounting rod arranged in the side groove.

[0012] As a further preferred embodiment of the present invention, the second hinge structure includes a groove arranged on the lower surface of the mounting ring, and a second mounting rod arranged in the groove.

[0013] As a further preferred embodiment of the present invention, a hinged rod is provided on one side of the cutting plate close to the drill rod, and connecting holes rotatably connected to the first mounting rod and the second mounting rod are respectively provided at both ends of the hinged rod.

[0014] As a further preferred embodiment of the present invention, the first hinge structure further includes a threaded hole arranged on the bottom surface of the annular groove, and a bolt passing through the bottom surface of the side slot and screwed to the threaded hole.

[0015] As a further preferred embodiment of the present invention, the first hinge structure further includes a countersunk hole provided on the bottom surface of the side slot and used for installing the bolt.

[0016] As a further preferred embodiment of the present invention, the first hinge structure also includes an inclined surface which is arranged on the outer annular surface of the drill bit rod and connected to the upper groove wall of the annular groove.

[0017] As a further preferred embodiment of the present invention, the inner diameter of the sealing connection ring is less than the outer diameter of the fixing ring and is less than or equal to the outer diameter of the sealing connection ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Attached Figure 1 It is a structural schematic diagram of the utility model.

[0019] Attached Figure 2 It is a schematic diagram of the local structure of the utility model Figure 1 .

[0020] Attached Figure 3 It is a schematic diagram of the local structure of the utility model Figure 2 .

[0021] Attached Figure 4 The three-dimensional structure of the utility model is shown in FIG. Figure 1 .

[0022] Attached Figure 5 The three-dimensional structure of the utility model is shown in FIG. Figure 2 .

[0023] Attached Figure 6 The three-dimensional structure of the utility model is shown in FIG. Figure 3 .

[0024] Description of the drawings: It includes a main drill rod 11, a drill bit rod 12, a sealing connection ring 13, a mounting ring 1, a cutting plate 2, a fixing ring 3, and a protective sleeve 4;

[0025] A first hinge structure 21, a second hinge structure 22, and a hinge rod 23;

[0026] Ring groove 211, ring body 212, side slot 213, first mounting rod 214, threaded hole 215, bolt 216, countersunk hole 217, inclined surface 218;

[0027] The groove 221 and the second mounting rod 222 . DETAILED DESCRIPTION

[0028] In the description of the present utility model, it should be understood that the terms "upper", "lower", "inside", "outside", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the utility model product is usually placed when in use, or are directions or positional relationships that are usually understood by those skilled in the art. These directions or positional relationships are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present utility model.

[0029] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms such as "setting" and "connection" should be understood in a broad sense. For example, "connection" 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 an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] The utility model provides a soft soil bored pile construction structure, comprising a main drill rod 11 and a drill rod 12 arranged at the lower end of the main drill rod 11 , wherein the main drill rod 11 and the drill rod 12 are connected via a sealing connection ring 13 .

[0031] It can be understood that the main drill rod 11 is a main rod commonly used in the art with spiral blades on the outer wall and connected to the driving motor at the top, and the drill rod 12 is a rod body commonly used in the art with a drill bit at the front end; the sealing connection ring 13 is an internal thread ring in this embodiment, and the outer walls of the main drill rod 11 and the drill rod 12 connected to the sealing connection ring 13 are both provided with matching external threads. In addition, structures such as sealing rings, sealing grooves, and limit rings can also be provided in the sealing connection ring 13 to increase the tightness of the connection between the main drill rod 11 and the drill rod 12. The above structures are common knowledge in the art, so they are not repeated in this embodiment.

[0032] In this embodiment, the construction structure also includes a mounting ring 1 arranged on the outer side of the outer ring surface of the sealing connection ring 13 close to the drill bit rod 12, a cutting plate 2 arranged at the lower end of the mounting ring 1 and connected to the drill bit rod 12, a fixing ring 3 arranged at the upper end of the sealing connection ring 13, and a protective sleeve 4 whose two ends are respectively connected to the fixing ring 3 and the mounting ring 1 and whose outer diameter gradually increases from top to bottom.

[0033] It is worth noting that a transverse support rod is provided on the inner wall of the mounting ring 1 and is connected to the outer wall of the sealing connection ring 13. The connection method between the transverse support rod and the two ring bodies can be a fixed connection such as welding, or a detachable connection method such as hinge. This embodiment is not limited, but the transverse support rod is preferably arranged at a position close to the connection between the main drill rod 11 and the drill bit rod 12 to assist in strengthening the connection strength between the main drill rod 11 and the drill bit rod 12 to avoid shaking; the structure of the cutting plate 2 can be directly referred to in the document with the prior art authorization announcement number CN220451789U The cutting plate is disclosed, so it is not repeated here; the inner diameter of the sealing connection ring 13 is less than the outer diameter of the fixing ring 3 ≤ the outer diameter of the sealing connection ring 13; the protective sleeve 4 can be a truncated cone with a straight hole inside for the sealing connection ring 13 to pass through, or it can be a truncated cone structure formed by a plate body connected around it, and its inclined slope can guide the soft soil to climb along the slope and enter the spiral blade of the main drill rod 11 and then be lifted and removed, which greatly reduces the amount of soft soil sticking between the sealing connection ring 13 and the mounting ring 1, and avoids the accumulation of soft soil during the drilling process, which affects the drilling effect or concrete discharge.

[0034] As a further preferred embodiment of the present invention, a hinged rod 23 is provided on one side of the cutting plate 2 close to the drill rod 12, and connection holes are provided at both ends of the hinged rod 23. A first hinge structure 21 is provided at one end of the hinged rod 23 to be connected to the drill rod 12, and a second hinge structure 22 is provided at the other end of the hinged rod 23 to be connected to the mounting ring 1. The purpose of such a configuration is to make the cutting plate 2 easy to disassemble, clean or replace, thereby improving the practicality of the device.

[0035] Among them, the first hinge structure 21 includes an annular groove 211 arranged on the outer annular surface of the drill bit rod 12, a ring body 212 embedded in the annular groove 211, a side groove 213 arranged on the outer side wall of the ring body 212, and a first mounting rod 214 arranged in the side groove 213, a threaded hole 215 arranged on the bottom surface of the annular groove 211, and a bolt 216 passing through the bottom surface of the side groove 213 and screwed to the threaded hole 215, a countersunk hole 217 arranged on the bottom surface of the side groove 213 and used to install the bolt 216, and an inclined surface 218 arranged on the outer annular surface of the drill bit rod 12 and connected to the upper groove wall of the annular groove 211.

[0036] The second hinge structure 22 includes a groove 221 disposed on the lower surface of the mounting ring 1 , and a second mounting rod 222 disposed in the groove 221 .

[0037] It is worth mentioning that the purpose of the connection method in which the ring body 212 is embedded in the annular groove 211 in this embodiment is to prevent the ring body 212 from protruding from the surface of the drill rod 12 and forming a node for soft soil adhesion; the purpose of the connection structure composed of the threaded hole 215, the bolt 216, and the countersunk hole 217 is to strengthen the connection between the ring body 212 and the annular groove 211 to prevent the ring body 212 from detaching from the annular groove 211 during the drilling process, and the structure for realizing this connection method is hidden and will not generate new adhesion nodes; the setting of the inclined surface 218 is to prevent the inclined hinge rod 23 from being lifted up by the surface of the drill rod 12, so that the cutting plate 2 installed on the hinge rod 23 is as close to the drill rod 12 as possible, thereby enhancing the drilling effect.

[0038] Compared with the prior art, the construction structure provided in this embodiment has the following advantages: on the basis of making the drill bit detachable for cleaning, a route is formed to guide the soft soil from the drill bit to the spiral blade, thereby reducing the accumulation of soft soil and improving the drilling effect; at the same time, the surface of the entire device is flat, and there are no nodes where soft soil adheres, which further improves the easy cleaning effect of the device.

[0039] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A bored pile construction structure for a soft soil layer, comprising a main drill rod (11) and a drill rod (12) arranged at the lower end of the main drill rod (11), wherein the main drill rod (11) and the drill rod (12) are connected via a sealing connection ring (13), characterized in that: It also comprises a mounting ring (1) arranged on the outer side of the outer ring surface of the sealing connection ring (13) close to the drill rod (12), a cutting plate (2) arranged at the lower end of the mounting ring (1) and connected to the drill rod (12), a fixing ring (3) arranged at the upper end of the sealing connection ring (13), and a protective sleeve (4) whose two ends are respectively connected to the fixing ring (3) and the mounting ring (1) and whose outer diameter gradually increases from top to bottom.

2. A soft soil bored pile construction structure according to claim 1, characterized in that: One end of the cutting plate (2) is provided with a first hinge structure (21) connected to the drill rod (12), and the other end of the cutting plate (2) is provided with a second hinge structure (22) connected to the mounting ring (1).

3. A soft soil bored pile construction structure according to claim 2, characterized in that: The first hinge structure (21) comprises an annular groove (211) arranged on the outer annular surface of the drill rod (12), a ring body (212) embedded in the annular groove (211), a side groove (213) arranged on the outer side wall of the ring body (212), and a first mounting rod (214) arranged in the side groove (213).

4. A soft soil bored pile construction structure according to claim 3, characterized in that: The second hinge structure (22) comprises a groove (221) arranged on the lower surface of the mounting ring (1), and a second mounting rod (222) arranged in the groove (221).

5. The soft soil bored pile construction structure according to claim 4, characterized in that: A hinged rod (23) is provided on one side of the cutting plate (2) close to the drill rod (12), and connection holes for rotationally connecting to the first mounting rod (214) and the second mounting rod (222) are respectively provided at both ends of the hinged rod (23).

6. The soft soil bored pile construction structure according to claim 3, characterized in that: The first hinge structure (21) further comprises a threaded hole (215) arranged on the bottom surface of the annular groove (211), and a bolt (216) passing through the bottom surface of the side slot (213) and threadedly connected to the threaded hole (215).

7. The soft soil bored pile construction structure according to claim 6, characterized in that: The first hinge structure (21) further comprises a countersunk hole (217) arranged on the bottom surface of the side slot (213) and used for installing the bolt (216).

8. The soft soil bored pile construction structure according to claim 3, characterized in that: The first hinge structure (21) further comprises an inclined surface (218) which is arranged on the outer annular surface of the drill bit rod (12) and connected to the upper groove wall of the annular groove (211).

9. The soft soil bored pile construction structure according to claim 1, characterized in that: The inner diameter of the sealing connection ring (13) is less than the outer diameter of the fixing ring (3) and is less than or equal to the outer diameter of the sealing connection ring (13).

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