Vibratory hammer for soft soil foundation gravel pile construction

Abstract

The utility model belongs to the technical field of vibratory hammers, and discloses a vibratory hammer for soft soil foundation gravel pile construction, which comprises a hydraulic vibratory hammer machine, the bottom end of the hydraulic vibratory hammer machine is fixedly connected with a vibrating rod, the bottom end of the vibrating rod is fixedly connected with a steel pipe head and an anti-collision mechanism, and the anti-collision mechanism is arranged at the bottom end of the steel pipe head; the anti-collision mechanism comprises a movable groove formed in the inner wall of the steel pipe head, and the inner wall of the movable groove is slidably connected with annularly-distributed movable rods. In this way, through compressed air in the air storage cylinder, the electric push rod and the piston block, four sets of movable rods, damping rods and balls are pushed at the same time, then the surfaces of the balls abut against the inner wall of the pipe pile, and therefore the bottom of the steel pipe head conducts centered vibration on gravel in the pipe pile, and the steel pipe head is prevented from impacting the inner wall of the pipe pile in the vibration process; the vibration uniformity of the steel pipe head on the gravel pile in the pipe pile is ensured, and the reinforcing effect on the soft soil foundation is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of vibratory hammers, in particular to a vibratory hammer for construction of gravel piles on soft soil foundations. Background Art

[0002] In order to improve the bearing capacity and stability of soft soil foundation, a vibratory hammer is usually used to generate vibration to drive gravel piles into the ground, and the interaction between the gravel piles and the original foundation is utilized to improve the bearing capacity and stability of the foundation.

[0003] After searching, the Chinese patent "Construction method for floating reinforced pipe piles by vibration replacement" authorization announcement number "CN108661093B" uses a hydraulic vibration pile hammer, a vibration rod, a flange, a steel pipe and a rubber sleeve. During the vibration process of the vibration rod, the rubber sleeve separates the steel pipe head from the inner wall of the pipe pile, protects the inner wall of the pipe pile, and makes the rubber sleeve and the bottom of the steel pipe head vibrate as gravel piles, ensuring the reinforcement effect of the foundation.

[0004] The rubber sleeve is soft. When the rubber sleeve and the steel pipe head vibrate the gravel pile, the vibration amplitude of the contact area between the rubber sleeve and the gravel pile is small, resulting in uneven vibration of the gravel pile, thereby affecting the reinforcement effect of the foundation.

[0005] Based on this, the utility model designs a vibrating hammer for gravel pile construction on soft soil foundation to solve the above problems. Utility Model Content

[0006] In view of the above-mentioned shortcomings of the prior art, the utility model provides a vibrating hammer for gravel pile construction on soft soil foundation.

[0007] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] A vibratory hammer for gravel pile construction on soft soil foundation, comprising: a hydraulic vibratory hammer machine, a vibratory rod fixedly connected to the bottom end of the hydraulic vibratory hammer machine, a steel pipe head fixedly connected to the bottom end of the vibratory rod, and an anti-collision mechanism, wherein the anti-collision mechanism is arranged at the bottom end of the steel pipe head; wherein the anti-collision mechanism comprises a movable groove opened on the inner wall of the steel pipe head, an annular movable rod is slidably connected to the inner wall of the movable groove, a damping rod is slidably connected to the inner wall of the movable rod, a ball is rollingly connected to one end of the damping rod, an air storage cylinder is fixedly connected to the inner wall of the steel pipe head, The inner wall of the air storage cylinder is filled with compressed gas, and the inner wall of the air storage cylinder is slidably connected to a piston block, and the top of the piston block is fixedly connected to an electric push rod; through the compressed gas in the air storage cylinder, the electric push rod and the piston block, the four groups of movable rods, the damping rod and the ball are pushed simultaneously, and then the surface of the ball is in contact with the inner wall of the pipe pile, so that the bottom of the steel pipe head can vibrate the gravel in the pipe pile in a centered manner, avoiding the steel pipe head from hitting the inner wall of the pipe pile during vibration, ensuring the uniformity of the vibration of the gravel pile in the pipe pile by the steel pipe head, and ensuring the reinforcement effect on the soft soil foundation.

[0009] Furthermore, a magnetic ring is embedded in one end of the movable rod, a magnetic block is embedded in one end of the damping rod, and the magnetic ring and the magnetic block repel each other with the same poles;

[0010] Furthermore, one end of the damping rod is fixedly connected to a rubber column, and the other end of the rubber column is fixedly connected to one end of the inner wall of the movable rod; the vibration of the ball on the inner wall of the pipe pile is dispersed through the magnetic ring, magnetic block, damping rod and rubber column, thereby reducing the vibration force of the steel pipe head during operation transmitted to the inner wall of the pipe pile, reducing damage to the inner wall of the pipe pile.

[0011] Furthermore, the inner wall of the movable groove is fixedly connected with a ring-shaped silicone ring, and the surface of the movable rod is slidably connected to the inner wall of the silicone ring; the silicone ring is used to seal the connection between the movable groove and the movable rod, thereby preventing impurities from entering the movable groove.

[0012] Furthermore, a spring is fixedly connected to the opposite end of the movable rod and the silicone ring; through the spring and the gas in the movable groove, the vibration of the movable rod is dispersed, avoiding the vibration force from being concentrated in a certain area of ​​the movable rod, thereby ensuring the service life of the movable rod.

[0013] Furthermore, one end of the damping rod is fixedly connected to a retaining ring, and the surface of the retaining ring is slidably connected to one end of the inner wall of the movable rod; through the retaining ring, sealing protection is achieved between the opposite ends of the magnetic ring and the magnetic block, preventing impurities from adhering to the surfaces of the magnetic ring and the magnetic block, thereby ensuring the repulsion effect between the magnetic ring and the magnetic block.

[0014] Furthermore, a protective cover is fixedly connected to the surface of the damping rod; through the protective cover, one end of the protective cover is in contact with the inner wall of the pipe pile, thereby reducing the adhesion of impurities on the surface of the ball.

[0015] Furthermore, the ball, retaining ring and protective cover are all polyurethane elastomer components; Beneficial Effects

[0016] 1. Through the compressed gas in the air cylinder, the electric push rod and the piston block, the four groups of movable rods, the damping rod and the ball are pushed at the same time, so that the surface of the ball is against the inner wall of the pipe pile, so that the bottom of the steel pipe head can vibrate the gravel in the pipe pile in a centered manner, avoiding the steel pipe head from hitting the inner wall of the pipe pile during vibration, ensuring the uniformity of the vibration of the gravel pile in the pipe pile by the steel pipe head, and ensuring the reinforcement effect of the soft soil foundation;

[0017] 2. The vibration of the ball on the inner wall of the pile is dispersed through the magnetic ring, magnetic block, damping rod and rubber column, thereby reducing the vibration force of the steel pipe head during operation transmitted to the inner wall of the pile, reducing the damage to the inner wall of the pile. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 The utility model is a vibration hammer main structure for soft soil foundation gravel pile construction Figure 1 ;

[0020] Figure 2 This is a schematic diagram of the structure of a vibration hammer anti-collision mechanism for gravel pile construction on soft soil foundation according to the utility model;

[0021] Figure 3 This is a cross-sectional view of a steel pipe head of a vibrating hammer for gravel pile construction on soft soil foundation according to the utility model;

[0022] Figure 4 for Figure 3 Enlargement of point A in the middle.

[0023] The numbers in the figure represent:

[0024] 1. Hydraulic vibratory hammer 2. Vibrating rod 3. Steel pipe head 4. Anti-collision mechanism 41. Movable groove 42. Movable rod 43. Damping rod 44. Ball 45. Air storage cylinder 46. Piston block 47. Electric push rod 48. Retaining ring 49. Magnetic ring 410. Magnetic block 411. Rubber column 412. Spring 413. Silicone ring 414. Protective cover. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] The utility model is further described below in conjunction with embodiments.

[0027] In some embodiments, please refer to the attached instructions. Figure 1-4 A vibratory hammer for gravel pile construction on soft soil foundation comprises: a hydraulic vibratory hammer machine 1, a vibratory rod 2 is fixedly connected to the bottom end of the hydraulic vibratory hammer machine 1, a steel pipe head 3 is fixedly connected to the bottom end of the vibratory rod 2, and an anti-collision mechanism 4 is arranged at the bottom end of the steel pipe head 3; wherein the anti-collision mechanism 4 comprises a movable groove 41 opened on the inner wall of the steel pipe head 3, a circular movable rod 42 is slidably connected to the inner wall of the movable groove 41, a damping rod 43 is slidably connected to the inner wall of the movable rod 42, a ball 44 is rollingly connected to one end of the damping rod 43, an air storage cylinder 45 is fixedly connected to the inner wall of the steel pipe head 3, the inner wall of the air storage cylinder 45 is filled with compressed gas, a piston block 46 is slidably connected to the inner wall of the air storage cylinder 45, and an electric push rod 47 is fixedly connected to the top of the piston block 46.

[0028] In the embodiment of the utility model, a pile driver is used to drive a pipe pile into a soft soil foundation and a certain amount of crushed stone is poured into the pipe pile so that the crushed stone falls into the bottom of the pipe pile. At this time, a certain length of vibration rod 2 is assembled by clamping the hydraulic vibration hammer 1, and the vibration rod 2 is extended into the pipe pile. At this time, the electric push rod 47 is manually turned on, and the telescopic end of the electric push rod 47 moves downward to drive the piston block 46 to move downward, so that the compressed gas in the air storage cylinder 45 is pushed into the movable groove 41. The gas in the movable groove 41 is sufficient to push the four movable rods 42 to move at the same time. The movement of the movable rod 42 drives the damping rod 43 and the ball 44 to move, so that the four balls 44 At the same time, it contacts the inner wall of the pipe pile, so that the vibration rod 2 is centered on the inner wall of the pipe pile, and the electric push rod 47 is manually closed and the hydraulic vibration hammer 1 is operated to move the vibration rod 2 and the steel pipe head 3 downward in the pipe pile and vibrate the gravel in the pipe pile, and vibrate the gravel into the loose soil at the bottom of the pipe pile. When the first batch of gravel is completely settled at the bottom of the loose soil, the vibration rod 2 is raised, and a certain amount of the second batch of gravel is filled into the mouth of the pipe pile, and then the vibration rod 2 is extended into the pipe pile to vibrate and settle the second batch of gravel. Similarly, the vibration rod 2 and the steel pipe head 3 vibrate a certain amount of gravel in the pipe pile to reinforce the soft soil foundation.

[0029] In the embodiment of the utility model, four balls 44 abut against the inner wall of the pile, preventing the steel pipe head 3 from colliding with the inner wall of the pile during vibration crushing, reducing direct damage to the inner wall of the pile and ensuring that the steel pipe head 3 can vibrate the crushed stones in the pile in a centered manner, ensuring uniform vibration of the crushed stones in the pile.

[0030] In one example of the utility model, the surface of the electric push rod 47 is fixedly connected to the upper end of the inner wall of the steel pipe head 3, the piston block 46 is a rubber component, the surface of the piston block 46 is tightly attached to the air storage cylinder 45, blocking the compressed gas at the bottom end of the piston block 46 from flowing to the top end thereof, and the surface of the vibration rod 2 is fixedly connected with a flange, so that the multi-section vibration rod 2 can be assembled by bolts.

[0031] In some embodiments, Figure 4 As shown, as a preferred embodiment of the utility model, a magnetic ring 49 is embedded and installed at one end of the movable rod 42, and a magnetic block 410 is embedded and installed at one end of the damping rod 43. The magnetic ring 49 and the magnetic block 410 repel each other with the same poles. A rubber column 411 is fixedly connected to one end of the damping rod 43, and the other end of the rubber column 411 is fixedly connected to one end of the inner wall of the movable rod 42.

[0032] In the embodiment of the utility model, when the steel pipe head 3 vibrates the gravel, the vibration force is transmitted to the movable rod 42, and the movable rod 42 transfers the vibration force to the damping rod 43 and the rubber column 411. Since the magnetic block 410 and the magnetic ring 49 have the same poles and repel each other, the vibration force on the damping rod 43 is dispersed, so that the damping rod 43 and the ball 44 will not generate large vibrations on the inner wall of the pile.

[0033] In the embodiment of the utility model, the damping rod 43, the rubber column 411, the magnetic block 410 and the magnetic ring 49 disperse the large vibration force of the steel pipe head 3 on the ball 44, thereby reducing the damage of the ball 44 to the inner wall of the pipe pile, and avoiding excessive vibration force of the ball 44 causing greater damage to the pipe pile and itself.

[0034] In some embodiments, Figure 3-4 As shown, the inner wall of the movable groove 41 is fixedly connected with a ring-shaped silicone ring 413, and the surface of the movable rod 42 is slidably connected to the inner wall of the silicone ring 413. As a preferred embodiment of the utility model, the movable rod 42 and the opposite end of the silicone ring 413 are fixedly connected with a spring 412.

[0035] In the embodiment of the utility model, the gas in the movable groove 41 pushes the movable rod 42 to move in the silicone ring 413 and compress the spring 412, thereby causing the movable rod 42 to slowly move toward the inner wall of the pile.

[0036] In the embodiment of the utility model, the silicone ring 413 blocks impurities from entering the movable groove 41 through the gap between the movable rod 42 and the movable groove 41. The spring 412 and the gas in the movable groove 41 disperse and reduce the vibration of the movable rod 42 subjected to the vibration force, thereby reducing the large vibration force transmitted by the movable rod 42 to the ball 44.

[0037] In some embodiments, Figure 3-4 As shown, as a preferred embodiment of the utility model, one end of the damping rod 43 is fixedly connected to a retaining ring 48, the surface of the retaining ring 48 is slidably connected to one end of the inner wall of the movable rod 42, and the surface of the damping rod 43 is fixedly connected to a protective cover 414, and the ball 44, the retaining ring 48 and the protective cover 414 are all polyurethane elastomer components.

[0038] In the embodiment of the utility model, the movement of the damping rod 43 drives the retaining ring 48 to move in the movable rod 42, and the downward movement of the steel pipe head 3 drives the ball 44 and the protective cover 414 to move downward on the inner wall of the pile.

[0039] In the embodiment of the utility model, the retaining ring 48 protects the magnetic ring 49 and the magnetic block 410, and prevents impurities from adhering to the ends of the magnetic ring 49 and the magnetic block 410. The protective cover 414 reduces the adhesion of larger impurities generated during the vibration of the steel pipe head 3 to the surface of the ball 44, thereby ensuring that the ball 44 rolls smoothly on the inner wall of the pile.

[0040] It should be noted that the hydraulic vibratory hammer 1, vibrating rod 2, steel pipe head 3, electric push rod 47, magnetic ring 49 and magnetic block 410 in the above description are all relatively mature devices in the existing technology. The specific models can be selected according to actual needs. At the same time, the hydraulic vibratory hammer 1 and the electric push rod 47 can be powered by a built-in power supply or by AC power. The specific power supply method is selected according to the situation and will not be elaborated here.

[0041] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A vibratory hammer for gravel pile construction on soft soil foundation, comprising: A hydraulic vibratory hammer (1), wherein the bottom end of the hydraulic vibratory hammer (1) is fixedly connected to a vibrating rod (2), and the bottom end of the vibrating rod (2) is fixedly connected to a steel pipe head (3), characterized in that: an anti-collision mechanism (4), wherein the anti-collision mechanism (4) is arranged at the bottom end of the steel pipe head (3); The anti-collision mechanism (4) comprises a movable groove (41) formed on the inner wall of the steel pipe head (3), the inner wall of the movable groove (41) is slidably connected to an annularly distributed movable rod (42), the inner wall of the movable rod (42) is slidably connected to a damping rod (43), one end of the damping rod (43) is rollingly connected to a ball (44), the inner wall of the steel pipe head (3) is fixedly connected to an air storage cylinder (45), the inner wall of the air storage cylinder (45) is filled with compressed gas, the inner wall of the air storage cylinder (45) is slidably connected to a piston block (46), and the top end of the piston block (46) is fixedly connected to an electric push rod (47).

2. The vibratory hammer for gravel pile construction on soft soil foundation according to claim 1, characterized in that: A magnetic ring (49) is embedded and installed at one end of the movable rod (42), and a magnetic block (410) is embedded and installed at one end of the damping rod (43); the magnetic ring (49) and the magnetic block (410) have the same polarities and repel each other.

3. The vibratory hammer for construction of gravel piles on soft soil foundation according to claim 1, characterized in that: One end of the damping rod (43) is fixedly connected to a rubber column (411), and the other end of the rubber column (411) is fixedly connected to one end of the inner wall of the movable rod (42).

4. The vibratory hammer for construction of gravel piles on soft soil foundation according to claim 1, characterized in that: The inner wall of the movable groove (41) is fixedly connected with a ring-shaped silicone ring (413), and the surface of the movable rod (42) is slidably connected to the inner wall of the silicone ring (413).

5. The vibratory hammer for construction of gravel piles on soft soil foundation according to claim 1, characterized in that: The opposite ends of the movable rod (42) and the silicone ring (413) are fixedly connected with a spring (412).

6. The vibratory hammer for construction of gravel piles on soft soil foundation according to claim 1, characterized in that: One end of the damping rod (43) is fixedly connected to a retaining ring (48), and the surface of the retaining ring (48) is slidably connected to one end of the inner wall of the movable rod (42).

7. The vibratory hammer for construction of gravel piles on soft soil foundation according to claim 1, characterized in that: A protective cover (414) is fixedly connected to the surface of the damping rod (43).

8. The vibratory hammer for construction of gravel piles on soft soil foundation according to claim 1, characterized in that: The rolling ball (44), the retaining ring (48) and the protective cover (414) are all polyurethane elastomer components.

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