Percussion drill hammer head of punching cast-in-place pile

Abstract

The utility model relates to a percussion drill hammerhead of a punching cast-in-place pile. Comprising a hammer rod located in the center, a hanging mechanism is arranged at the top of the hammer rod, a plurality of hammer bodies spaced at equal angles in the circumferential direction are installed on the side portion of the hammer rod, a longitudinal through channel is formed between every two adjacent hammer bodies, a plurality of hammer teeth are installed on the outer side of the bottom of each hammer body, and detachable connecting strips are installed between the outer sides of the bottoms of the hammer bodies. The connecting strip is in a circular arc shape, a groove is formed in the outer side of the bottom of the hammer body, a threaded hole is formed in the bottom of the groove, the end of the connecting strip is located in the groove and provided with a sunk screw hole, and the end of the connecting strip is fixedly connected through an assembling screw located in the threaded hole and the sunk screw hole. According to the percussion drill hammerhead of the punching cast-in-place pile, probe stones on the hole wall can be completely removed through the impact effect provided by the connecting strips on the hole wall, the integrity and continuity when the hole wall is impacted are improved, the installation efficiency of a steel casing is improved, and the construction efficiency of the punching cast-in-place pile is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of cast-in-place pile construction technology, especially relates to a percussion drill hammer head of punch bored cast-in-place pile. BACKGROUND

[0002] Punch bored cast-in-place pile is a kind of cast-in-place pile, and punch bored cast-in-place pile construction refers to the construction technology that uses percussion drill machine to lift the percussion drill hammer head with drill blade, and uses the impact force of free falling to cut rock stratum and discharge debris to form hole.Punch bored cast-in-place pile is formed by directly forming hole on pile site on construction site, then placing reinforcement cage and pouring concrete, and the hole is formed by percussion of punch bored cast-in-place pile construction machine, and the hole is formed by mud protection wall.The advantages are as follows: harmful influence on adjacent buildings and surrounding environment is small, pile length and diameter can be freely changed according to design requirements, pile end can enter bearing stratum or embed into rock stratum, and single pile bearing capacity is large.In specific construction level, steel casing is installed in pile hole after initial hole formation on ground by percussion drill hammer head, subsequent punch boring construction is carried out in steel casing, and hole washing is carried out after punch boring is completed.

[0003] The percussion drill hammer head used in the foregoing process is lifted and released by percussion drill machine, and the percussion drill hammer head is ground against the inner wall of the pile hole during lifting and lowering.Because the action of the mud in the hole needs to be considered during lifting and lowering in the mud, a longitudinal through channel is provided on the percussion drill hammer head.In actual construction, the following problems exist: during the process of lifting and grinding the hole wall, the position corresponding to the aforementioned longitudinal through channel cannot effectively exert grinding impact on the hole wall, which leads to the problem of probe stone, that is, a block stone that protrudes into the hole and has not been effectively removed is left on the hole wall, and due to the existence of the probe stone, the steel casing cannot be smoothly lowered to a specific depth when the steel casing is installed, and in this case, rework repair is needed, which reduces the sinking efficiency of the steel casing and further reduces the construction efficiency of the punch bored cast-in-place pile.

[0004] In summary, a new type of percussion drill hammer head needs to be developed and designed to solve the foregoing technical problems. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide a percussion drill hammer head of punch bored cast-in-place pile, which improves the integrity and continuity when impacting the hole wall and avoids the problem of probe stone.

[0006] The utility model discloses a technical scheme that is adopted: a percussion drill hammer head of punched filling pile, including the hammer pole of center, be equipped with the suspension mechanism in the top of hammer pole, install a plurality of circumferential equal angle interval hammer body in the side of hammer pole, form the longitudinal through channel between adjacent hammer body, install a plurality of hammer teeth on the bottom outside of each hammer body, install the detachable connecting strip between the bottom outside of each hammer body, the connecting strip is the circular arc shape, be equipped with the recess in the bottom outside of hammer body and be equipped with the screw hole in the groove bottom of recess, the end of connecting strip is located in recess and is equipped with the countersunk screw hole, and the end of connecting strip adopts the assembly screw fixed connection in screw hole and countersunk screw hole.

[0007] Preferably, a fishing hook is further arranged in the middle of each connecting strip and is arranged inwardly inclined, the lower end of the fishing hook is fixedly connected with the connecting strip, and the main body of the fishing hook is located in the longitudinal through channel.

[0008] Preferably, the hammer body is provided with four, and the hammer pole and each hammer body are integrally casted.

[0009] Preferably, the suspension mechanism comprises a top lifting ring with a threaded rod at the bottom, a horizontal through window is arranged at the top of the hammer pole, a center hole is arranged at the center of the top, the threaded rod penetrates downward through the center hole and enters the window, and a lock nut is arranged at the lower part of the threaded rod.

[0010] Preferably, a side lifting ring is arranged at the upper side of each hammer body.

[0011] The utility model has the advantages and positive effects that:

[0012] The utility model provides a kind of percussion drill hammer head of punched filling pile, compared with the existing percussion drill hammer head, the utility model's percussion drill hammer head is installed with the connecting strip of circular arc shape between the lower part of each hammer body, the outside of longitudinal through channel, so that in the process that percussion drill hammer head is moved up and down in pile hole, the hole wall corresponding to the position of longitudinal through channel is provided with impact by connecting strip, while connecting strip does not affect longitudinal through channel as longitudinal channel for mud to pass through.The impact provided by connecting strip to hole wall can completely remove the possible existing probe stone on hole wall, improve the integrity and continuity when impacting hole wall, so that when steel casing is sunk after that pile hole is initially completed, since the potential probe stone problem is solved, steel casing can be more smoothly sunk in place, improve the installation efficiency of steel casing and ensure the construction efficiency of punched filling pile.

[0013] By setting fishing hook in the middle of connecting strip and located in longitudinal through channel and inclined inwardly, the percussion drill bit is provided with more fishing lifting points, and when hammer drop occurs (the phenomenon that percussion drill hammer head and steel wire rope are disconnected, and percussion drill hammer head sinks to the bottom of pile hole), more fishing lifting points make percussion drill hammer head easier to fish. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0015] Figure 2 yes Figure 1 Schematic diagram of the AA section structure.

[0016] In the picture:

[0017] 1. Hammer rod; 2. Lock nut; 3. Top lifting ring; 4. Threaded rod; 5. Window; 6. Side lifting ring; 7. Hammer body; 8. Assembly screw; 9. Hammer tooth; 10. Connecting strip; 11. Salvage hook; 12. Groove; 13. Threaded hole; 14. Countersunk screw hole. Detailed Implementation

[0018] To further understand the invention content, features and effects of this utility model, the following embodiments are provided in detail.

[0019] Please see Figure 1 and Figure 2 The impact drill hammer of this utility model for bored piles includes a hammer rod 1 located at the center, a hanging mechanism at the top of the hammer rod 1, and multiple hammer bodies 7 spaced at equal circumferential angles on the side of the hammer rod 1. A longitudinal through channel is formed between adjacent hammer bodies 7, and multiple hammer teeth 9 are installed on the outer bottom of each hammer body 7. The hanging mechanism is used to connect to the wire rope of the impact drill. The hammer teeth 9 located on the outer bottom of each hammer body 7 are made of wear-resistant alloy and are welded to the hammer body 7. When the impact drill hammer moves up and down in the pile hole, the hammer teeth 9 have a better impact cutting effect on the hole wall. The longitudinal through channel between adjacent hammer bodies 7 serves as a longitudinal channel for mud to pass through.

[0020] In this embodiment, the hanging mechanism includes a top lifting ring 3 with a threaded rod 4 at the bottom, a horizontally penetrating window 5 at the top of the hammer rod 1 and a central hole at the center of the top, the threaded rod 4 penetrating downward through the central hole and entering the window 5, a lock nut 2 installed at the lower part of the threaded rod 4, and the top lifting ring 3 connected to the wire rope of the impact drill.

[0021] In this embodiment, a side lifting ring 6 is provided on the upper outer side of each hammer body 7. The side lifting ring 6 can be used to connect the safety rope of the impact drill hammer head.

[0022] In this embodiment, four hammer bodies 7 are provided, and the hammer rod 1 is integrally cast with each hammer body 7. For example... Figure 1 As shown, the hammer body 7 includes a wedge-shaped portion at the top and a straight portion at the bottom. Each hammer tooth 9 is welded and mounted on the outer surface of the straight portion, and the lower end of the hammer tooth 9 is lower than the lower end of the hammer body 7.

[0023] A detachable connecting strip 10 is installed between the outer sides of the bottoms of the hammer bodies 7, the connecting strip 10 is in a circular arc shape, recesses 12 are provided on the outer sides of the bottoms of the hammer bodies 7, threaded holes 13 are provided on the bottoms of the recesses 12, the end portions of the connecting strip 10 are located in the recesses 12 and are provided with countersunk screw holes 14, and the end portions of the connecting strip 10 are fixedly connected by means of assembly screws 8 located in the threaded holes 13 and the countersunk screw holes 14.

[0024] The connecting strip 10 is located on the outer side of the longitudinal through channel, occupies the space of the vacancy and does not significantly change the longitudinal channel of the mud, and in the process of lifting and lowering movement of the impact drill hammer head in the pile hole, the connecting strip 10 can impact the probe stones on the hole wall, effectively causing the probe stones on the hole wall to fall off, which can solve the problem that the steel casing cannot be smoothly sunk due to the presence of the probe stones. The connecting strip 10 is made of wear-resistant alloy and can be replaced after excessive wear, and by embedding the two ends of the connecting strip 10 into the recesses 12 on the hammer bodies 7, the bonding strength between the end portions of the connecting strip 10 and the hammer bodies 7 can be improved, and the use of countersunk screw holes 14 can avoid the exposure of assembly screws 8, thus avoiding the problem of difficult disassembly after wear of the assembly screws 8.

[0025] In the embodiment, a fishing hook 11 is also provided on the middle portion of each connecting strip 10 and is inwardly inclined, the lower end of the fishing hook 11 is fixedly connected to the middle portion of the connecting strip 10, and the main body portion of the fishing hook 11 is located in the longitudinal through channel. The fishing hook 11 is provided to solve the problem of disconnection between the impact drill hammer head and the steel wire rope and the problem of hammer drop in which the impact drill hammer head sinks to the bottom of the pile hole during the construction of the cast-in-place pile, at which time the impact drill hammer head needs to be fished, and the fishing hooks 11 on the connecting strips 10 constitute multiple fishing lifting points, which can make the fishing of the impact drill hammer head more convenient.

Claims

1. An impact drill hammer for bored cast-in-place piles, characterized in that: The device includes a hammer rod (1) located at the center, a hanging mechanism at the top of the hammer rod (1), multiple hammer bodies (7) spaced at equal circumferential angles on the side of the hammer rod (1), a longitudinal through channel formed between adjacent hammer bodies (7), multiple hammer teeth (9) installed on the outer bottom of each hammer body (7), and a detachable connecting strip (10) installed between the outer bottom of each hammer body (7). The connecting strip (10) is arc-shaped, with a groove (12) on the outer bottom of the hammer body (7) and a threaded hole (13) at the bottom of the groove (12). The end of the connecting strip (10) is located in the groove (12) and has a countersunk screw hole (14). The end of the connecting strip (10) is fixedly connected by an assembly screw (8) located in the threaded hole (13) and the countersunk screw hole (14).

2. The impact drill hammer for bored cast-in-place piles as described in claim 1, characterized in that: Each connecting bar (10) is also provided with an inwardly inclined retrieval hook (11) in the middle. The lower end of the retrieval hook (11) is fixedly connected to the connecting bar (10), and the main body of the retrieval hook (11) is located in the longitudinal through channel.

3. The impact drill hammer for bored piles as described in claim 2, characterized in that: There are four hammer bodies (7), and the hammer rod (1) is integrally cast with each hammer body (7).

4. The impact drill hammer for bored piles as described in claim 3, characterized in that: The hanging mechanism includes a top lifting ring (3) with a threaded rod (4) at the bottom, a horizontally penetrating window (5) at the top of the hammer rod (1) and a central hole at the center of the top, the threaded rod (4) penetrating downward through the central hole and entering the window (5), and a lock nut (2) installed at the lower part of the threaded rod (4).

5. The impact drill hammer for bored cast-in-place piles as described in claim 4, characterized in that: Side hanging rings (6) are provided on the upper outer side of each hammer body (7).

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