An integrated hole cleaning system for bored piles

Abstract

An integrated hole cleaning system for bored piles of the present invention includes a circulating drilling rig main machine installed on a crawler mobile platform and a sediment separation system. The sediment separation system includes a sediment separator, and the sediment separator is provided with a sand outlet, a slurry outlet and a feed inlet. The circulating drilling rig main machine is externally connected with a drill pipe, and a reflux hole is arranged in the middle of the drill pipe. The reflux hole is connected with the feed inlet through a mud pump. The sand outlet is externally connected with a sand bag, and the slurry outlet is connected to the pile hole through a mud pipe. By arranging the circulating drilling rig main machine and the sediment separation system on the crawler mobile platform, the present invention can quickly realize the transfer of the integrated hole cleaning system for bored piles. Combined with the design of the drill pipe, when maintaining pressure during grouting, it can be folded and attached to the surface of the pile hole through the casing to form support for the pile hole and prevent the collapse of the pile hole surface. At the same time, combined with the treatment of the sediment separator, the quality of the introduced slurry is improved, avoiding part of the residue floating in the slurry or precipitating at the bottom of the hole, and improving its construction quality.

Description

Technical Field

[0001] The present invention relates to the technical field of hole cleaning treatment for bored piles, and more specifically, to an integrated hole cleaning system for bored piles. Background Art

[0002] To ensure the smooth progress of the bored pile during the drilling process with a rotary drilling rig, slurry with a relatively large specific gravity is often poured into the pile hole to form a mud cake on the hole wall, and the internal water pressure provided by the slurry is used to balance the soil pressure in the pile hole to prevent the risk of hole wall collapse.

[0003] However, when the rotary drilling rig relies on the drill bit to remove the drill cuttings in the hole during the process, inevitably, some residues will float in the slurry or settle at the bottom of the hole. To ensure that the finally poured concrete of the bored pile does not have problems such as mud inclusion or pile breakage, it is necessary to clean the pile foundation hole to clean the bottom sediment of the hole and filter the slurry in the hole. Thus, a device for pile foundation hole cleaning - a sediment separator came into being.

[0004] The residues washed out by the traditional single sediment separator are directly discharged at the construction site and not well treated, which has a great impact on the surrounding working environment and does not meet the requirements of the standardized construction of a civilized construction site. On the other hand, the traditional sediment separator has low separation efficiency, and the sand content in the treated slurry is still relatively large, which has a large impact on the relatively rough surface of the pile hole formed by the current drill pipe and is prone to the problem of hole collapse.

[0005] Therefore, the present invention has carried out the transformation of the sediment separator equipment and proposed an integrated combined hole cleaning device for bored piles. Summary of the Invention

[0006] The present invention provides an integrated hole cleaning system for bored piles to solve the problem of the single function and poor hole cleaning efficiency of the existing bored pile hole cleaning system.

[0007] According to one aspect of the present invention, there is provided an integrated hole cleaning system for bored piles, including a circulating drilling rig main machine and a sediment separation system installed on a crawler mobile platform. The sediment separation system includes a sediment separator, and the sediment separator is provided with a sand outlet, a slurry outlet and a feed inlet. The circulating drilling rig main machine is externally connected with a drill pipe, and a return hole is arranged in the middle of the drill pipe. The return hole is connected with the feed inlet through a mud pump. The sand outlet is externally connected with a sand bag, and the slurry outlet is connected to the pile hole through a mud pipe.

[0008] Preferably based on the above solution, the drill pipe includes an installation rod with a return hole inside, a connecting rod, a lifter, and a cutting head. One end of the connecting rod is connected to the installation rod, and a connector is installed at the other end of the connecting rod head. The lifter includes a foldable sleeve, an upper sleeve, a lower sleeve, and a mounting head. The upper sleeve is slidably sleeved on the connecting rod in a sealed manner. The lower sleeve is fixed on the mounting head. The upper part of the sleeve is fixed on the upper sleeve, and the lower part of the sleeve is fixed on the lower sleeve. An installation cavity is provided on the mounting head. The connector is inserted into the installation cavity, and the cutting head is installed at the bottom of the mounting head.

[0009] Preferably based on the above solution, a clamping groove is provided at the end of the connector, and a protrusion adapted to the clamping groove is provided at the end of the cutting head.

[0010] Preferably based on the above solution, two oppositely arranged and spiral adjustment holes are provided on the outer circumferential surface of the mounting head, and a pin is provided on the connector. The pin is inserted into the adjustment hole.

[0011] Preferably based on the above solution, a connecting wing is rotatably installed at the end of the connecting rod through a mounting shaft. The connecting wing is arc-shaped, and an arc-shaped pressing plate is provided at its end. The pressing plate intermittently abuts against the inner side surface of the sleeve.

[0012] Preferably based on the above solution, an insertion hole is provided at the bottom of the upper sleeve. The connecting wing is inserted into the insertion hole and extends outward.

[0013] Preferably based on the above solution, a guide post is provided on the end face of the mounting head close to the connector, and an arc-shaped guide hole is provided on the connecting wing. The guide post is adapted to the guide hole.

[0014] Preferably based on the above solution, the crawler mobile platform includes a frame body and crawlers installed on the frame body. A slewing base is provided on the frame body, and a moving frame with a slide rail is provided on the slewing base. An installation seat is installed on the slide rail, and a mud pipe hoisting device is installed on the installation seat.

[0015] An integrated bored pile hole cleaning system of the present invention can quickly realize the transfer of the integrated bored pile hole cleaning system by arranging a circulating drilling rig main machine and a mud and sand separation system on a crawler mobile platform. In combination with the design of the drill pipe, when maintaining pressure during grouting, the sleeve can be folded and attached to the surface of the pile hole to form support for the pile hole, preventing the surface of the pile hole from collapsing. At the same time, combined with the treatment of the mud and sand separator, the quality of the introduced mud is improved, avoiding part of the residue floating in the mud or settling at the bottom of the hole, and improving its construction quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings. In the accompanying drawings:

[0017] Figure 1 It is a schematic diagram of the principle structure of the integrated hole cleaning system for bored piles of the present invention;

[0018] Figure 2 It is a structural diagram of the integrated hole cleaning system for bored piles of the present invention removing the main body of the circulating drilling rig;

[0019] Figure 3 It is a side view of the integrated hole cleaning system for bored piles of the present invention removing the main body of the circulating drilling rig;

[0020] Figure 4 It is the first state diagram of the drill pipe of the present invention;

[0021] Figure 5 It is the cross-sectional view of the first state of the drill pipe of the present invention;

[0022] Figure 6 It is the second state diagram of the drill pipe of the present invention;

[0023] Figure 7 It is the cross-sectional view of the second state of the drill pipe of the present invention;

[0024] Figure 8 It is the exploded view of the drill pipe of the present invention;

[0025] Figure 9 It is the sectional view of the sediment separator of the present invention;

[0026] Figure 10 It is the three-dimensional view of the sieve tray of the present invention;

[0027] Figure 11 It is the top view of the sieve tray of the present invention;

[0028] Explanation of the reference numerals in the drawings:

[0029] Crawler mobile platform 1, frame 11, crawler 12, slewing base 13, slide rail 14, traveling frame 15, mounting seat 16, mud pipe hoist 17

[0030] Circular drilling rig mainframe 2, drill pipe 21, return hole 22, mounting rod 23, connecting rod 24, mounting shaft 241, connecting wing 242, pressing plate 243, guiding hole 244, lifter 25, casing 251, upper sleeve 252, insertion hole 253, lower sleeve 254, mounting head 26, mounting cavity 261, adjusting hole 262, guiding column 263, connector 27, clamping groove 271, pin 272, cutting head 28, protrusion 281;

[0031] Sediment separation system 3, sediment separator 31, sand outlet 32, slurry outlet 33, feed inlet 34, separation kettle 35, sieve tray 351, separation layer 352, inner layer 353, outer layer 354, pyramid 355, sieve hole 356;

[0032] Slurry pump 4, slurry pipe 41, pile hole 42. Specific embodiments

[0033] The following combines the drawings and embodiments to further describe in detail the specific embodiments of the present invention. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0034] It should be understood that when used in this specification and the appended claims, the term "comprising" indicates the presence of described features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or groups.

[0035] For the sake of simplicity of the drawings, only the parts related to the present invention are schematically shown in each drawing, and they do not represent their actual structures as products. In addition, for the sake of simplicity and easy understanding of the drawings, in some drawings, components with the same structure or function are only schematically shown for one of them, or only one of them is marked. In this article, "one" not only means "only this one", but also can mean "more than one" situation.

[0036] It should also be further understood that the term "and / or" used in the description of this application and the appended claims refers to any combination and all possible combinations of one or more of the related listed items, and includes these combinations.

[0037] In the embodiments shown in the drawings, the indication of directions (such as up, down, left, right, front and back) is used to explain that the structures and movements of various components of the present invention are not absolute but relative. When these components are in the positions shown in the drawings, these descriptions are appropriate. If the descriptions of the positions of these components change, then the indication of these directions also changes accordingly.

[0038] In addition, in the description of this application, the terms "first", "second", etc. are only used for distinguishing descriptions, and cannot be understood as indicating or implying relative importance.

[0039] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will describe the specific embodiments of the present invention with reference to the accompanying drawings. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings, and other embodiments can also be obtained.

[0040] Please refer to Figure 1 and in combination with Figure 2 and Figure 3 As shown, an integrated hole cleaning system for bored piles of the present invention includes a circulating drill rig main unit 2 and a sediment separation system 3 installed on a crawler 12 - type mobile platform 1. The sediment separation system 3 includes a sediment separator 31. The sediment separator 31 is provided with a sand outlet 32, a slurry outlet 33, and a feed inlet 34. The circulating drill rig main unit is externally connected to a drill pipe 21. A reflux hole 22 is provided in the middle of the drill pipe 21. The reflux hole 22 is connected to the feed inlet 34 through a mud pump 4. The sand outlet 32 is externally connected to a sand bag, and the slurry outlet 33 is connected to a pile hole 42 through a mud pipe 41.

[0041] Specifically, the crawler 12 - type mobile platform 1 of the present invention includes a frame body 11 and crawlers 12 installed on the frame body 11. A slewing base 13 is provided on the frame body 11, and a traveling frame 15 with a slide rail 14 is provided on the slewing base 13. An installation seat 16 is installed on the slide rail 14, and a mud pipe 41 hoisting device 17 is installed on the installation seat 16.

[0042] During use, through the crawler 12 - type mobile platform 1, the circulating drill main unit and the sediment separation system 3 are transported to the construction location of the construction site to be processed. The rotary drill main unit is started to drive the drill pipe 21 to drill holes at the designed position. During the drilling process, the generated mud is guided through the reflux hole 22 and introduced into the feed inlet 34 of the sediment separator 31 through the mud pump 4. The sediment separation is carried out by the sediment separator 31. The separated sediment is discharged through the sand outlet 32 into the sand bag for packaging to avoid polluting the surrounding working environment; while the separated slurry is guided through the slurry outlet 33 into the formed pile hole 42, and the internal water pressure provided by the slurry is used to balance the soil pressure in the pile hole 42 to prevent the risk of hole wall collapse.

[0043] During the pile machine drilling process, due to soil quality reasons, such as when the soil is relatively soft, when the pile machine drills, the soil on the surface of the formed pile hole 42 is relatively soft. Therefore, the surface of the pile hole 42 will be uneven, resulting in the collapse of the pile hole 42 during the grouting process due to the scouring of the injected mud. To address the above problems, the drill pipe 21 of the present application is improved, and the specific structure is as Figure 3 shown.

[0044] The drill pipe 21 of the present invention includes a mounting rod 23 with a return hole 22 inside, a connecting rod 24, a lifter 25, and a cutting head 28. The mounting rod 23 is connected to the circulating drill rig main unit 2 installed on the crawler 12-type mobile platform 1, and the mounting rod 23 is driven to rotate by the circulating drill rig main unit 2 to drive the connecting rod 24 at the other end of the mounting rod 23 to rotate.

[0045] A connector 27 is installed at the end of the connecting rod 24 of the present invention. The lifter 25 includes a collapsible sleeve 251, an upper sleeve 252, a lower sleeve 254, and a mounting head 26. The sleeve 251 can be telescopic. In actual operation, the sleeve 251 can be made of a high-toughness metal sleeve 251 or a high-strength plastic pipe. The upper sleeve 252 of the present invention is slidably sleeved on the connecting rod 24 in a sealed manner. The lower sleeve 254 is fixed on the mounting head 26. The upper part of the sleeve 251 is fixed on the upper sleeve 252, and the lower part of the sleeve 251 is fixed on the lower sleeve 254 to form a sealed structural state. An installation cavity 261 is provided on the mounting head 26 of the present invention. One end of the connector 27 is fixed to the connecting rod 24, and the other end of the connector 27 is inserted into the installation cavity 261, and the cutting head 28 is installed at the bottom of the mounting head 26. For the specific structure, please refer to Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 as shown.

[0046] It should be noted that in order to facilitate the return of the mud, return holes 22 for returning the mud are provided in the middle of the mounting rod 23, the connecting rod 24, the connector 27, and the cutting head 28 of the present invention.

[0047] During use, when the cutting head 28 at the bottom interacts with the inner end face of the hole for drilling, the generated mud passes through the return hole 22 in the cutting head 28, passes through the return hole 22 in the middle of the connector, and then passes through the return holes 22 of the connecting rod 24 and the mounting rod 23, and is led to the sand separator 31 for rapid separation.

[0048] Please continue to refer to Figure 3 as shown. In order to limit the telescopic height of the lifter 25, the connecting rod 24 of the present invention is designed to have a structure that is large in the middle and small at both ends. The upper part of the connecting rod 24 is connected to the connecting rod 24 by a thread, and an internal thread is designed in the return hole 22 at the lower end of the connecting rod 24. The connector 27 is in a T shape, and a return hole 22 is designed at its central position. An external thread adapted to the internal thread on the connecting rod 24 is provided on the upper part of the connector 27. The connector 27 passes through the installation hole on the mounting head 26 and extends upward to be fixed to the end of the connecting rod 24.

[0049] When the cutting head 28 at the bottom just starts to act on the inner end surface of the pile hole 42, at this time, the connector 27 and the cutting head 28 are meshed with each other, that is, the lifter 25 is in the extended state at this time. As the cutting depth increases, the generated slurry will gradually increase. The increased slurry will be introduced into the connector 27 through the return holes 22 on the cutting head 28 and enter the installation cavity 261. Due to the action of gravity, the lower sleeve 254 fixed on the installation head 26 will move downward. When moving, due to the limitation of the movement of the middle connector 27 in the installation cavity 261, the middle sleeve will be bent to form a protrusion. The protrusion formed by bending the sleeve can act on the inner edge surface of the pile hole 42, which can not only support it, but also level it, so as to reduce the problem that the formed surface of the pile hole 42 is too rough, resulting in scouring after grouting and causing the collapse of the pile hole 42.

[0050] It should be noted that a clamping groove 271 is provided at the end of the connector 27 of the present invention, and a protrusion 281 adapted to the clamping groove 271 is provided at the end of the cutting head 28. That is, when the cutting head 28 starts to move and cut, the clamping groove 271 and the protrusion 281 can act on each other to realize the mutual meshing between the two, so as to achieve the transmission of the acting force to make up for the acting force transmitted by the connecting rod 24, the connector 27 and the installation head 26.

[0051] Two relatively arranged and spiral adjusting holes 262 are provided on the outer cylindrical surface of the installation head 26 of the present invention. A pin 272 is provided on the connector 27, and the pin 272 is inserted into the adjusting hole 262 to further limit the rising or falling height of the connector 27 in the installation cavity 261 of the installation head 26.

[0052] In actual use, the strength of the protrusion formed by the telescopic sleeve is limited. In order to ensure its acting force on the surface of the pile hole 42, the end of the connecting rod 24 of the present invention is rotatably installed with a connecting wing 242 through a mounting shaft 241. The connecting wing 242 is arc-shaped and its end is provided with an arc-shaped pressing plate 243. The pressing plate 243 intermittently abuts against the inner side surface of the sleeve 251. A through hole 253 is provided at the bottom of the upper sleeve 252. The connecting wing 242 is inserted into the through hole 253 and extends outwards to control the unfolding or folding of the connecting wing 242.

[0053] When the sleeve is in the extended state, at this time, under the acting force of the inner edge surface of the sleeve, the connecting wing 242 is folded inside the upper sleeve 252, and the end of the pressing plate 243 abuts against the inner edge surface of the sleeve. When the sleeve is in the contracted state, that is, when its middle is in the folded state, at this time, due to the loss of the external binding acting force, the connecting wing 242 automatically opens to abut against the inner edge surface of the folded sleeve to form a support and act on the inner edge surface of the pile hole 42.

[0054] In order to ensure the smoothness of its movement, the present invention provides a guide column 263 on the end surface of the mounting head 26 close to the connector 27 , and an arc-shaped guide hole 244 is provided on the connecting wing 242 , and the guide column 263 is adapted to the guide hole 244 .

[0055] Please continue reading Figure 1 and Figure 2 As shown, the crawler 12-type mobile platform 1 of the present invention includes a frame 11 and a crawler 12 installed on the frame 11, a swivel seat 13 is provided on the frame 11, and a travel frame 15 with a slide rail 14 is provided on the swivel seat 13, a mounting seat 16 is installed on the slide rail 14, and the mounting seat 16 is installed with a mud pipe 41 hoist 17.

[0056] When in use, the swivel seat 13 can be rotated to drive the circulating drilling rig main unit 2 and the mud-sand separation system 3 installed thereon to rotate to adapt to position processing at different angles, and the relative position of the mud pipe 41 hoist 17 can be adjusted through the slide rail 14 to prevent the mud pipe 41 from folding and affecting its mud transportation efficiency.

[0057] Please continue reading Figure 9 , and combined with Figure 10 and Figure 11 As shown, it should be noted that the mud and sand separator 31 of the present invention includes a separation kettle 35 and a sieve plate 351 installed in the separation kettle 35. The separation kettle 35 is conical, and the sieve plates 351 are installed in the separation kettle 35 at multiple intervals. Adjacent sieve plates 351 form a separation layer 352. A feed port 34 is provided on the separation kettle 35, and the feed port 34 is introduced tangentially to the separation kettle 35. In this way, after the reflux mud is introduced, it will rotate along the inner edge surface of the sieve plate 351, and rotate rapidly under the high pressure of the mud. With the action of centrifugal force, the mud with lower density will be thrown outward and thrown out through the fan disk, while the mud and sand particles with higher density will remain in the middle and be gradually output downward and discharged through the sand outlet 32 at the bottom of the separation kettle 35, and the slurry outlet 33 at the top of the separation kettle 35 will quickly discharge the mud between the fan disk and the separation kettle 35.

[0058] To improve its sediment separation effect and efficiency, the present invention also distributes the inner layer 353 and the outer layer 354 on the sieve plate 351. The inner layer 353 is arranged at a position close to the center of the sieve plate 351, and the outer layer 354 is arranged at a position far from the center of the sieve plate 351. A trapezoidal pyramid 355 is arranged on the surface of the inner layer 353, and sieve holes 356 are arranged on the surface of the outer layer 354. When the slurry acts tangentially on the surface of the sieve plate 351 through the feed port 34, the slurry rotates at a high speed and is thrown outwards to the outer layer 354 under the action of the rotational force, and enters the space between the separation kettle 35 and the sieve mesh through the sieve holes 356 to achieve the separation of the slurry. The sediment with a larger density, due to the action of gravity and the further reduction of its centrifugal force by the action of the pyramid 355, gradually deposits towards the center of the sieve plate 351 and is discharged through the sand discharge hole at the center of the sieve plate 351.

[0059] Compared with the prior art, the present invention is assembled by the crawler 12 - type mobile platform 1, has good mobility, enables the bored pile hole - cleaning equipment to be moved according to the on - site construction needs, and also reduces the risk of hoisting operations.

[0060] The sediment separator of the present invention uses ecological bags to modify the sediment discharge port of the sediment separator, which can effectively concentrate the treatment of residues and avoid environmental pollution caused by the discharged residues. By integrating and combining the walking system, power system, control system and hole - cleaning device, the invention only requires one operator to complete the hole - cleaning operation of the equipment during the production process, greatly reducing the construction cost. Therefore, the invention has great popularization value in the bored pile hole - cleaning construction.

[0061] Finally, the method of the present application is only a preferred implementation scheme and is not used to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An integrated hole cleaning system for bored piles, characterized in that, It includes a circulating drill rig main unit installed on a crawler mobile platform and a sediment separation system. The sediment separation system includes a sediment separator, on which there are a sand outlet, a slurry outlet and a feed inlet. The circulating drill rig main unit is externally connected to a drill pipe, and a reflux hole is provided in the middle of the drill pipe. The reflux hole is connected to the feed inlet through a mud pump. The sand outlet is externally connected to a sand bag, and the slurry outlet is connected to a pile hole through a mud pipe. The drill pipe includes an installation rod with a reflux hole inside, a connecting rod, a lifter and a cutting head. One end of the connecting rod is connected to the installation rod, and a connector is installed at the other end of the connecting rod head. The lifter includes a foldable sleeve, an upper sleeve, a lower sleeve and an installation head. The upper sleeve is slidably sleeved on the connecting rod in a sealed manner. The lower sleeve is fixed on the installation head. The upper part of the sleeve is fixed on the upper sleeve, and the lower part of the sleeve is fixed on the lower sleeve. An installation cavity is provided on the installation head. The connector is inserted into the installation cavity, and the cutting head is installed at the bottom of the installation head.

2. The integrated hole cleaning system for bored piles according to claim 1, wherein The crawler mobile platform includes a frame body and crawlers installed on the frame body. A slewing base is provided on the frame body, and a traveling frame with a slide rail is provided on the slewing base. An installation seat is installed on the slide rail, and a mud pipe hoist is installed on the installation seat.

3. The integrated hole cleaning system for bored piles according to claim 1, characterized in that The sediment separator includes a separation kettle and a sieve plate installed in the separation kettle. The sieve plates are installed in the separation kettle at intervals. Adjacent sieve plates form a separation layer. The feed inlet is provided on the separation kettle, and the feed inlet is tangentially introduced into the separation kettle.

4. The integrated hole cleaning system for bored piles according to claim 1, wherein, A clamping groove is provided at the end of the connector, and a protrusion adapted to the clamping groove is provided at the end of the cutting head.

5. The integrated hole cleaning system for bored piles according to claim 1, wherein Two relatively arranged and spiral adjustment holes are provided on the outer circumferential surface of the installation head. A pin is provided on the connector, and the pin is inserted into the adjustment hole.

6. The integrated hole cleaning system for bored piles according to claim 1, characterized in that A connecting wing is rotatably installed at the end of the connecting rod through an installation shaft. The connecting wing is arc-shaped, and an arc-shaped pressing plate is provided at its end. The pressing plate intermittently abuts against the inner side surface of the sleeve.

7. The integrated hole cleaning system for bored piles according to claim 6, wherein, A through hole is provided at the bottom of the upper sleeve. The connecting wing is inserted into the through hole and extends outwards.

8. The integrated hole cleaning system for bored piles according to claim 7, wherein A guide post is provided on the end face of the installation head close to the connector. An arc-shaped guide hole is provided on the connecting wing, and the guide post is adapted to the guide hole.

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