Salvage device for drill falling of bridge impact drilling pile

Abstract

The utility model discloses a salvaging device for drill dropping of a bridge impact drilling pile, which comprises an impact cone and a brush cylinder, a winch is fixed on a drilling machine, one end of a steel wire rope is wound on the winch, the other end of the impact cone is detachably and fixedly connected with an annular tension band, and a drill bit of an impact drill to be salvaged is a cross-shaped drill bit. Lug rings are arranged on four ridges of the cross shape at the upper end of the drill bit, the inner diameter of the annular tension band is larger than the diameter of an outer circle formed by the outer sides of the four lug rings, and the other end of the steel wire rope is used for fixing one end of the binding punching cone or fixing one end of the binding brush cylinder; and the other end of the steel wire rope a is wound on the annular hoop and is bound into a movable joint. The problems that in the prior art, the success rate is low and personal safety is harmed due to the fact that manual hoisting and hole digging fishing are adopted are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of bored pile construction auxiliary equipment and relates to a salvaging device for a dropped drill of a bridge impact bored pile. Background Art

[0002] The status of bridges in highway construction is very important. Bored piles are the most widely used form of pile foundation construction due to their strong adaptability, low cost and simple construction. According to the designed length and diameter of the pile, a "cross-shaped" impact hammer drill is used to drill holes, which has a better pile-forming effect and better hole wall stability during the hammering process. However, when encountering caves and river areas, due to construction on the river, the groundwater system is relatively developed, and the mud wall is impacted by the groundwater flow, resulting in hole collapse and the drill bit being buried. That is, there is an accident of hole collapse burying the drill bit. The drill bit needs to be salvaged and the drilling construction is carried out again.

[0003] At present, the main methods used are pumping water, manually hoisting into the hole, and using full casing to follow up for wall protection and salvage. However, this method has a low success rate due to the large amount of groundwater in summer and the inability of water pumps to pump out the water in time. In addition, the filling material in the cave is highly fluid, which endangers personal safety. Utility Model Content

[0004] The utility model aims to provide a salvage device for dropped drill bits of bridge impact bored piles, which solves the problems of low success rate and harm to personal safety of salvaging by manual hoisting and digging holes in the prior art.

[0005] The technical scheme adopted by the utility model is a salvage device for a dropped drill of a bridge impact bored pile, comprising an impact cone and a brush cylinder, a winch is fixed on the drilling rig, one end of a steel wire rope is wound on the winch, the other end of the impact cone is detachably and fixedly connected with an annular hoop, the impact drill bit to be salvaged is a "cross-shaped" drill bit, four "cross-shaped" ridges at the upper end of the drill bit are all provided with earrings, the inner diameter of the annular hoop is larger than the outer diameter formed by the outer sides of the four earrings, the other end of the steel wire rope is fixedly tied to one end of the impact cone or to one end of the brush cylinder, and also comprises a crane, a steel wire rope a is fixed on the hook of the crane, and the other end of the steel wire rope a is wound around the annular hoop and tied into a live joint.

[0006] The utility model is also characterized in that:

[0007] The punch cone includes a cone body in a cylindrical shape, a connecting sleeve connected to the cone body as a whole is arranged at the lower end of the cone body, a punch of the punch cone is fixedly connected to the end of the connecting sleeve away from the cone body, the punch of the punch cone is arranged in a "bullet head" shape with an elliptical cross-section, a groove is provided on the side surface of the upper end of the cone body, a binding hole is provided on the top of the cone body, the binding hole is connected with the groove, and the steel wire rope is passed through the binding hole and the groove and fixedly bound to the punch cone.

[0008] A plurality of steel bars are uniformly welded around the circumference of the cone body, the steel bars are distributed along the length direction of the cone body, and the plurality of steel bars are also fixedly connected together by at least four stirrups from top to bottom.

[0009] Four blade feet are evenly arranged around the circumference of the outer wall of the connecting sleeve, and steel pipe segments are connected to the blade feet through bolts. The other ends of the four steel pipe segments are fixedly connected with an annular hoop through an anchor clamp, and the annular hoop is located below the punch cone punch.

[0010] The brush cylinder includes a cylindrical cylinder wall, the bottom of which is arranged in a trapezoidal serrated shape, a plurality of circular openings are opened on the cylinder wall, two parallel stress-bearing ribs of the same length are welded to the upper end of the inner side of the cylinder wall, a stress-bearing plate is fixedly connected at the middle position of the two stress-bearing ribs, a lifting hole is opened at the position of the stress-bearing plate corresponding to the central axis of the cylinder wall, and a steel wire rope is passed through the lifting hole and tied to the stress-bearing rib.

[0011] Each stress-bearing rib is also fixedly connected with an auxiliary rib at the position on both sides of the stress-bearing plate. The other end of the auxiliary rib is welded to the inner wall of the cylinder wall, and the four auxiliary ribs are symmetrically distributed around the central axis of the cylinder wall. The auxiliary ribs are inclined downward from the stress-bearing rib to the inner wall of the cylinder wall.

[0012] A plurality of groups of brush cylinder reinforcing ribs are evenly arranged on the inner wall of the cylinder wall around the side wall thereof, and each group of brush cylinder reinforcing ribs includes at least two vertical steel bars arranged vertically.

[0013] The beneficial effects of the utility model are:

[0014] (1) The utility model adopts a combination of an impact cone and a brush barrel to completely hollow out the mud and debris around the drill bit and completely crush it, and then use a crane to remove the drill bit, thereby solving the problem of pumping water, manually hanging into the hole, and following up with a full casing for wall protection and salvage. In summer, the amount of groundwater is large, the water pump cannot pump out in time, the success rate of salvage is low, and there is a risk of personal safety. The utility model can significantly improve the safety factor and work efficiency of impact drill bit salvage work.

[0015] (2) The punch cone of the utility model is a cylindrical body as a whole, and its tail end is designed as a flat-mouthed elliptical "bullet head" shaped punch cone, which is convenient for entering the four gaps in the middle of the "cross-shaped" drill bit, impacting and crushing the stone slag sandwiched in the middle, removing it, and efficiently stripping the drill bit, which is more convenient to use.

[0016] (3) The bottom of the brush barrel of the utility model is designed to be a trapezoidal serrated shape. The purpose of this design is to completely hollow out the mud and debris around the drill bit and completely crush it, which can significantly improve the safety factor and work efficiency of the impact drill bit salvage work.

[0017] (4) During salvage, the utility model wraps one end of the steel wire rope around the annular hoop to form a slipknot. Once a pulling force is applied, the steel wire rope is tightened inwards and upwards under the earring to firmly wrap around the drill bit, so that the drill bit can be pulled out with force, thereby significantly improving the grabbing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a salvage device for a bridge impact bored pile that has fallen off;

[0019] Figure 2 It is a structural schematic diagram of a punch cone in a salvage device for a bridge impact bored pile that has fallen off;

[0020] Figure 3 yes Figure 2 Bottom view of

[0021] Figure 4 It is a structural schematic diagram of a salvage device for bridge impact bored piles in which the punch cone is not provided with an annular hoop;

[0022] Figure 5 It is a structural schematic diagram of a brush cylinder in a salvage device for a bridge impact bored pile that has fallen off;

[0023] Figure 6 yes Figure 5 Top view of the .

[0024] In the figure: 1. punch cone, 2. brush cylinder, 4. winch, 5. wire rope, 6. earring, 7. ring hoop, 8. drilling rig control lever, 9. wire rope b, 10. hook, 11. slurry supply pipe, 12. mud aqueduct, 13. drill bit, 14. auxiliary pulley, 15. guide wheel, 16. main pulley;

[0025] 1-1. cone body, 1-2. connecting sleeve, 1-3. punch head, 1-4. groove, 1-5. binding hole, 1-6. steel bar, 1-7. stirrup, 1-8. blade foot, 1-9. steel pipe segment, 1-10. anchor clamp;

[0026] 2-1. Cylinder wall, 2-2. Circular opening, 2-3. Stress-bearing ribs, 2-4. Stress-bearing plates, 2-5. Hanging holes, 2-6. Auxiliary ribs, 2-7. Brush cylinder reinforcement ribs. DETAILED DESCRIPTION

[0027] The utility model is described in detail below with reference to the accompanying drawings and specific implementation modes.

[0028] Example 1

[0029] The utility model is a salvage device for bridge impact drilling piles, and its structure is as follows: Figure 1As shown, the drilling rig includes an impact cone 1 and a brush cylinder 2. A winch 4 is fixed on the drilling rig, one end of a steel wire rope 5 is wound on the winch 4, the other end of the impact cone 1 is detachably fixedly connected with an annular hoop 7, the impact drill bit to be salvaged is a "cross-shaped" drill bit, and earrings 6 are provided on the four "cross-shaped" ridges at the upper end of the drill bit. The inner diameter of the annular hoop 7 is larger than the outer diameter formed on the outside of the earring 6. The other end of the steel wire rope 5 is fixedly tied to one end of the impact cone 1 or to one end of the brush cylinder 2. A crane is also included, and a steel wire rope a is fixed on the hook of the crane. The other end of the steel wire rope a is wound around the annular hoop 7 and tied into a live joint.

[0030] like Figure 2-4 As shown, the punch cone 1 includes a cone body 1-1 in a cylindrical shape, a connecting sleeve 1-2 connected to the cone body 1-1 is arranged at the lower end of the cone body 1-1, a punch cone head 1-3 is fixedly connected to the end of the connecting sleeve 1-2 away from the cone body 1-1, and the punch cone head 1-3 is arranged in a "bullet head" shape with an elliptical cross-section, a groove 1-4 is provided on the side surface of the upper end of the cone body 1-1, and a binding hole 1-5 is provided on the top of the cone body 1-1, and the binding hole 1-5 is connected to the groove 1-4, and a steel wire rope 5 is passed through the binding hole 1-5 and the groove 1-4 and fixedly bound to the punch cone 1.

[0031] A plurality of steel bars 1-6 are uniformly welded around the outer circumference of the cone body 1-1. The steel bars 1-6 are distributed along the length direction of the cone body 1-1. The plurality of steel bars 1-6 are also fixedly connected together by at least four stirrups 1-7 from top to bottom.

[0032] Four blade feet 1-8 are evenly arranged around the circumference of the outer wall of the connecting sleeve 1-2, and the blade feet 1-8 are connected to steel pipe segments 1-9 by bolts. The other ends of the four steel pipe segments 1-9 are fixedly connected to an annular hoop 7 by an anchor clamp 1-10, and the annular hoop 7 is located below the punch cone 1-3.

[0033] like Figure 5 , 6 As shown, the brush barrel 2 includes a cylindrical barrel wall 2-1, the height of the barrel wall 2-1 is at least 20 cm higher than the height of the drill bit, the bottom of the barrel wall 2-1 is set to a trapezoidal serration, and a plurality of circular openings 2-2 are opened on the barrel wall 2-1. Two parallel and equal-length stress-bearing ribs 2-3 are welded to the inner upper end of the barrel wall 2-1, and a stress-bearing plate 2-4 is fixedly connected at the middle position of the two stress-bearing ribs 2-3. A hanging hole 2-5 is opened at the position of the stress-bearing plate 2-4 corresponding to the central axis of the barrel wall 2-1, and the steel wire rope 2-5 passes through the hanging hole 2-5 and is tied to the stress-bearing rib 2-3.

[0034] Each stress-bearing rib 2-3 is also fixedly connected with an auxiliary rib 2-6 at the position on both sides of the stress-bearing plate 2-4. The other end of the auxiliary rib 2-6 is welded to the inner wall of the cylinder wall 2-1, and the four auxiliary ribs 2-6 are symmetrically distributed around the central axis of the cylinder wall 2-1. The auxiliary ribs 2-6 are inclined downward from the stress-bearing rib 2-3 to the inner wall of the cylinder wall 2-1.

[0035] A plurality of groups of brush cylinder reinforcing ribs 2-7 are evenly arranged on the inner wall of the cylinder wall 2-1 around its side wall, and each group of brush cylinder reinforcing ribs 2-7 includes at least two vertical steel bars arranged vertically.

[0036] The working principle of the salvage device for bridge impact bored piles in this embodiment is as follows:

[0037] After the drill bit falls, the winch 4 is a double-drum winch. The wire rope 5 of the winch 4 on the drilling rig is passed around the main pulley 16 of the drilling rig and then tied and fixed with the punch cone 1 through the tying holes 1-5 and the grooves 1-4. The punch cone 1 is pulled up and down by the winch 4 in cooperation with the wire rope 5. At this time, the punch cone 1 does not have the annular hoop 7. Then the winch 4 is operated to lower the punch cone 1 to a position 0.4-0.6 meters above the fallen drill bit. Positioning marks are marked on the wire rope 5 every one meter, and then it is controlled by the drilling rig joystick 8. At a certain The impact cone 1 is lifted within the height of the drilling rig, and then the drilling rig joystick 8 is controlled to make the impact cone 1 fall freely. During the impact process, the strong potential energy is used as kinetic energy to break the bedrock soil and drill into the hole. This process is repeated until the drill bit is in the hole. The specific height of the drill bit is marked on the wire rope 5. Then, the wire rope b9 on the auxiliary pulley 14 at the front end of the drilling rig is used, one end of which is connected to the winch 4 through the guide wheel 15. The wire rope b9 is passed through the hook 10 at the other end to tie up the cone body 1-1, and the direction of the impact cone is changed by pulling the wire rope b9.

[0038] The buried steel casing is impacted around during the drilling operation to first find the exact position of the drill bit in the well, that is, the gap between the middle of the "cross-shaped" drill bit and the hole wall, mark the wellhead, and then use the punch cone 1 to impact the four gaps in the middle of the "cross-shaped" drill bit to crush and remove the stone slag sandwiched in the middle, peel off the mud slag in the middle of the drill bit, isolate the drill bit, and then transfer and remove the debris through the mud circulation through the slurry supply pipe 11. A mud aqueduct 12 is set in advance on one side of the pile foundation hole, and the mud entrained with the debris flows into the mud pool through the mud aqueduct 12 for sedimentation, and then flows into the hole through the slurry supply pipe 11 and the mud pump to form a mud wall protection circulation.

[0039] If after impacting with the impact cone 1, it is found that the buried mud residue around the drill bit has not been completely impacted into place, and the drill bit is still difficult to be brought out, continue to impact with the brush tube, untie the impact cone 1 and the wire rope 5, and then pass the wire rope 2-5 through the lifting hole 2-5 to tie it to the force-bearing reinforcement 2-3 and the brush tube 2, and lift the brush tube 2 within a certain height, and then operate the winch control lever to make the brush tube 2 fall freely, use the impact kinetic energy to squeeze out the soil layer or broken rock layer around the drill bit, and then remove the drill residue and rock cuttings out of the hole through mud circulation. Since the inner diameter of the barrel wall 2-1 of the brush tube 2 is larger than the diameter of the buried drill bit, and the height is higher than the height of the drill bit, the brush tube 2 wraps the drill bit inside the barrel wall 2-1, and more accurately and conveniently empties all the mud residue around the drill bit, and ensures that the mud and rocks around the drill bit have been completely impacted and broken.

[0040] Since the position of the drill bit in the hole has been measured, if the mud and rocks around the drill bit have been cleared by the punch cone 1 and the brush cylinder 2, the hammer is lifted to stop the mud circulation, and one end of the wire rope b9 with a hook 10 is hooked on the slurry supply pipe 11, and the rubber slurry supply pipe 11 is lifted out of the hole through the secondary pulley 14 at the front end of the drilling rig. Prior to this, one end of the four steel pipe segments is anchored on the punch cone by bolts, and the other end of the steel pipe segment is installed with an anchor clamp 1-10 to fix the annular hoop 7. Then, one end of the steel wire rope a is wrapped around the annular hoop to make a slipknot, and the other end is tied to the hook of the crane. Then, the steel wire rope 5 on the winch 4 is used to bind and fix the punch cone 1 through the binding holes 1-5 and the grooves 1-4. The punch cone 1 is lowered according to the position of the drill bit 13, and the annular hoop 7 is lowered to below the four earrings 6 of the four ridges of the "cross" at the upper end of the drill bit. Then, by applying tension to the steel wire rope a wrapped around the annular hoop 7, the steel wire rope a is tightened inwardly and tightened upward under the earrings to firmly cover the drill bit, and the drill bit is lifted out by a crane. When the drill bit is lifted out by the crane, ensure that the lifting rope and the center of the pile hole are in the same position, and the maximum deviation between the two should be less than 2cm.

[0041] Example 2

[0042] On the basis of Example 1, the earring 6 is fixed to the four "cross-shaped" ridges at the upper end of the drill bit by welding, the cone body 1-1 and the connecting sleeve 1-2, the connecting sleeve 1-2 and the cone punch 1-3 are all threadedly connected, the stirrup 1-7 is connected to the steel bar 1-6 by welding, and the blade foot 1-8 is fixed to the connecting sleeve 1-2 by welding.

[0043] Example 3

[0044] In order to ensure vertical drilling and avoid the risk of hole collapse caused by load force during drilling operations, a steel casing must be buried with a height of no less than 3 meters and a diameter of 2.1 meters. The casing diameter is 0.3m larger than the bored pile diameter. It is buried from the ground down and accurately positioned. The outside of the steel casing is compacted with clay soil, and neck ribs are welded at the joints to improve overall stability.

[0045] The impact drill is used to make holes. The impact drill is located in the center of the buried casing axis. The main components of the impact drill are: 45kw power motor; the diameter of the winch wire rope is 38mm; the classification of impact drills is based on their weight. The "cross-shaped" drill head with a small lower and a large lower head weighs 6.4t, is 2.2m long and has a diameter of 1.80m;

[0046] During the drilling process, mud wall protection is required. A mud pool is dug about five meters away from the pile foundation to equip and temporarily store mud. A mud circulation pump is hung on it. A rubber tube with a diameter of 50mm is connected to the pump. The other end of the rubber tube is placed at the bottom of the pile foundation for mud circulation. The mud specific gravity should be controlled to be larger overall. Clean water control can be increased during drilling. During the drilling process, clay and newly prepared mud need to be continuously added to adjust the mud specific gravity during construction. The mud specific gravity is 1.3 to prevent hole collapse. Stop drilling when the drill bit falls 0.4-0.6 meters away from the impact, and replace the punch cone for construction.

[0047] Based on the above foundation, the cone body 1-1 of the salvage device 1 of this embodiment is a cylinder with a diameter of 25 cm and a length of 4.3 meters, on which 15 Φ22 steel bars 1-6 are welded to increase the weight of the cone body 1-1, and 4 stirrups are welded to fix it firmly, weighing about 1.5t, the groove 1-4 is 25 cm long and 20 cm wide, and the annular hoop 7 is a circular hoop with a diameter of 1 meter gripped by Φ22 steel bars.

Claims

1. A salvage device for bridge impact bored piles, characterized in that: The invention comprises a punch cone (1) and a brush cylinder (2) and a winch (4) fixed on a drilling rig, one end of a steel wire rope (5) being wound on the winch (4), the other end of the punch cone (1) being detachably fixedly connected to an annular hoop (7), the impact drill bit to be salvaged is a "cross-shaped" drill bit, four "cross-shaped" ridges at the upper end of the drill bit are provided with earrings (6), the inner diameter of the annular hoop (7) is larger than the outer diameter formed by the outer sides of the four earrings (6), the other end of the steel wire rope (5) is fixedly tied to one end of the punch cone (1) or to one end of the brush cylinder (2), and also comprises a crane, the hook of the crane is fixed with a steel wire rope a, the other end of the steel wire rope a is wound around the annular hoop (7) and tied to form a live joint.

2. The salvage device for bridge impact bored piles according to claim 1 is characterized in that: The punching cone (1) comprises a cone body (1-1) in a cylindrical shape, a connecting sleeve (1-2) connected to the cone body (1-1) is arranged at the lower end of the cone body (1-1), a punching cone punch (1-3) is fixedly connected to the end of the connecting sleeve (1-2) away from the cone body (1-1), the punching cone punch (1-3) is in a "bullet head" shape with an elliptical cross section, a groove (1-4) is provided on the side surface of the upper end of the cone body (1-1), a tying hole (1-5) is provided on the top of the cone body (1-1), the tying hole (1-5) is connected to the groove (1-4), and the steel wire rope (5) passes through the tying hole (1-5) and the groove (1-4) and is fixedly tied to the punching cone (1).

3. The salvage device for bridge impact bored piles according to claim 2 is characterized in that: A plurality of steel bars (1-6) are uniformly welded around the outer circumference of the cone body (1-1), the steel bars (1-6) are distributed along the length direction of the cone body (1-1), and the plurality of steel bars (1-6) are also fixedly connected together by at least four stirrups (1-7) from top to bottom.

4. The salvage device for bridge impact bored piles according to claim 2 is characterized in that: Four blade feet (1-8) are evenly arranged around the circumference of the outer wall of the connecting sleeve (1-2), and the blade feet (1-8) are connected to steel pipe segments (1-9) by bolts. The other ends of the four steel pipe segments (1-9) are fixedly connected to the annular hoop (7) by anchor clamps (1-10), and the annular hoop (7) is located below the punch cone punch (1-3).

5. The salvage device for bridge impact bored piles according to claim 1, characterized in that: The brush cylinder (2) comprises a cylindrical cylinder wall (2-1), the bottom of the cylinder wall (2-1) is arranged in a trapezoidal sawtooth shape, a plurality of circular openings (2-2) are provided on the cylinder wall (2-1), two parallel stress-bearing ribs (2-3) of the same length are welded to the inner upper end of the cylinder wall (2-1), a stress-bearing sheet (2-4) is fixedly connected at the middle position of the two stress-bearing ribs (2-3), a hanging hole (2-5) is provided on the stress-bearing sheet (2-4) at a position corresponding to the central axis of the cylinder wall (2-1), and the steel wire rope (5) passes through the hanging hole (2-5) and is tied to the stress-bearing rib (2-3).

6. The salvage device for bridge impact bored piles according to claim 5, characterized in that: Each of the force-bearing ribs (2-3) is also fixedly connected to an auxiliary rib (2-6) at a position located on both sides of the force-bearing sheet (2-4); the other end of the auxiliary rib (2-6) is welded to the inner wall of the cylinder wall (2-1); and the four auxiliary ribs (2-6) are symmetrically distributed around the central axis of the cylinder wall (2-1); and the auxiliary ribs (2-6) are inclined downward from the force-bearing rib (2-3) to the inner wall of the cylinder wall (2-1).

7. The salvage device for bridge impact bored piles according to claim 5, characterized in that: A plurality of groups of brush cylinder reinforcing ribs (2-7) are evenly arranged on the inner wall of the cylinder wall (2-1) around its side wall, and each group of the brush cylinder reinforcing ribs (2-7) includes at least two vertically arranged vertical steel bars.

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