Small flat plate leveling hammer for dynamic compaction and manufacturing and assembling method of small flat plate leveling hammer

Abstract

The small flat plate leveling hammer for dynamic compaction comprises a bottom stress hammer, the bottom surface of the bottom stress hammer is square, the whole bottom stress hammer is in a square column shape, and four rammer lug plates are symmetrically arranged on the upper surface of the bottom stress hammer in a square shape; the balance hanging plate is fixedly connected with the rammer lug plate through a steel wire rope, and a balance hanging ring is arranged at the top of the balance hanging plate; the steel plate weight stack is arranged at the top of the bottom stress hammer, a reinforcing top cover is arranged at the bottom of the steel plate weight stack, and the axis connecting piece penetrates through the reinforcing top cover and the steel plate weight stack from top to bottom and extends to the center position of a hammer body in the bottom stress hammer. Compared with a traditional rammer, the ramming blind area can be greatly reduced, positioning is easy and fast, the rammer can flexibly control the ramming point lap joint distance in the construction process, uneven upwelling or upheaval of a construction face is avoided, use is more stable, the ramming capacity can be more evenly transmitted, and the integral forming effect of the construction face is good.

Description

Technical Field

[0001] The invention relates to the technical field of dynamic compaction construction equipment, and in particular to a small-sized flat plate leveling hammer for dynamic compaction and a manufacturing and assembling method thereof. Background Art

[0002] The dynamic compaction replacement foundation treatment construction method has the advantages of fast processing speed, low cost and wide impact range. However, dynamic compaction construction also has its shortcomings. For example, when the foundation soil is highly sensitive silty clay with high water content, the use of traditional full rammers cannot fully meet the construction requirements.

[0003] The applicant's prior application CN114808914A discloses a special-shaped guided combination hammer for strong tamping, including a basic tamping hammer and a guiding tamping hammer. The basic tamping hammer is in a convex shape, and its bottom is a cylindrical hammer body. A vertically extending hammer neck is integrally arranged in the middle of the top end of the hammer body, and a number of vertically penetrating exhaust holes are opened on the hammer body outside the hammer neck in a circular array. The hammer neck is cylindrical, and its axis is coaxial with the axis of the hammer body. A mushroom head lifting screw coaxially arranged therewith is threadedly connected at the center position of the top of the hammer neck, and the bottom end of the mushroom head lifting screw passes through the hammer neck and extends to a certain depth in the hammer body. The guiding tamping hammer is cylindrical, and its top end is fixedly connected to the center position of the bottom end of the hammer body of the basic tamping hammer, and its axis is coaxial with the axis of the hammer body. Its cross-sectional size is smaller than the cross-sectional size of the hammer body and larger than the cross-sectional size of the hammer neck.

[0004] The applicant's prior application CN116575431A discloses a tamping hammer and a production method thereof, including a stressed hammer body, an axial connecting rod and a plurality of counterweight plates. One side of the axial connecting rod is connected to the middle of the top surface of the stressed hammer body. The counterweight plate is provided with a through hole in the middle, and the counterweight plate can be inserted into the axial connecting rod. The counterweight plate closest to the stressed hammer body fits the top surface of the stressed hammer body, and the size of the counterweight plate is smaller than the bottom surface size of the stressed hammer body. The tamping hammer of this patent has a counterweight plate that is convenient for increasing or decreasing the weight of the tamping hammer according to actual needs, thereby realizing the conversion of the hammer weight, so that the tamping construction can better meet the construction needs and ensure the construction quality of the tamping construction.

[0005] Most of the full tamping hammers in the existing technology are cylindrical in shape. The circular bottom area is small, the tamping points can only be tangent, and there are blind spots on the construction surface, which causes the site to be deformed (surging, bulging) due to force. The construction forming effect is poor, and usually manual and mechanical secondary leveling is required, which is time-consuming and labor-intensive. Summary of the invention

[0006] The object of the present invention is to provide a small flat plate leveling hammer for strong compaction and a manufacturing and assembling method thereof, so as to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides a small flat leveling hammer for strong tamping, comprising: a bottom force hammer, the bottom surface of the bottom force hammer is square, and the overall shape is a square column, the upper surface of the bottom force hammer is square and symmetrically provided with four tamping hammer ear plates; a balancing hanging plate, the balancing hanging plate is fixedly connected to the tamping hammer ear plate by a steel wire rope, and a balancing hanging ring is provided on the top of the balancing hanging plate; a steel plate counterweight plate, the steel plate counterweight plate is arranged on the top of the bottom force hammer, and a reinforced top cover is arranged at the bottom of the steel plate counterweight plate, and the axial connecting piece penetrates the reinforced top cover and the steel plate counterweight plate from top to bottom and extends to the center position of the hammer body inside the bottom force hammer.

[0008] In a preferred embodiment, the bottom force hammer is symmetrically provided with four vertical exhaust holes in a square shape. The exhaust holes are circular and penetrate the bottom force hammer in depth. The exhaust holes are provided on the inner side of the hammer ear plate 11.

[0009] In a preferred embodiment, the bottom of the steel plate weight plate is circular and the whole is in the shape of a flat cylinder, and the radius of the steel plate weight plate is half of the cross-sectional size of the bottom force hammer.

[0010] In a preferred embodiment, three connecting bolts arranged in an equilateral triangle are provided on the reinforced top cover, and the connecting bolts fixedly connect the steel plate counterweight plate and the bottom force hammer.

[0011] In a preferred embodiment, the reinforced top cover includes a top cover body and connecting bolt holes. The top cover body is a truncated cone structure. An axial connecting bolt hole is arranged at the center of the top cover body, and three connecting bolt holes are arranged in an equilateral triangle outside the axial connecting bolt hole in the top cover body.

[0012] In a preferred embodiment, the diameter of the steel plate counterweight is equal to the bottom diameter of the top cover body, an axial connecting bolt hole is set at the center of the steel plate counterweight, and three connecting bolt holes are set in an equilateral triangle outside the axial connecting bolt hole in the steel plate counterweight.

[0013] In a preferred embodiment, the rammer ear plate is a horizontally arranged rectangular steel plate and a vertically arranged punched ear plate, the punched ear plate is used to fix the wire rope, the wire rope is fixed by a wire rope clamp to form a bending arc, and four wire rope clamps are fixed on each bending section, and the spacing between the wire rope clamps is 100 mm.

[0014] In a preferred embodiment, the balance hanging plate is trapezoidal in shape and is made of high-strength manganese steel. Double holes are symmetrically provided at the bottom of the balance hanging plate for connecting steel wire ropes. The middle position of the upper portion of the balance hanging plate is fixedly connected to the connecting hole below the balance lifting ring by a high-strength manganese steel bolt, and the connecting hole above the balance lifting ring is connected to the lifting steel wire rope of the rammer.

[0015] In a preferred embodiment, the depth of the connecting bolt hole is greater than 1 / 2 of the height of the bottom force hammer.

[0016] The present invention also provides a method for manufacturing and assembling the small flat plate leveling hammer for strong compaction, comprising the following steps: Step 1: Draw the structural processing diagram of the small flat plate leveling hammer for strong compaction, and determine the dimensions of each component of the small flat plate leveling hammer for strong compaction according to the dimensions of all nodes of the components in the processing diagram; Step 2: Make a bottom force hammer, and weld four rammer ear plates symmetrically in a square shape on the upper surface of the bottom force hammer, wherein the bottom force hammer is cut and processed from a square column with a length of 1500 mm, a width of 1500 mm, and a height of 300 mm; Step 3: making a steel plate counterweight, wherein the bottom of the steel plate counterweight is circular, and the radius of the steel plate counterweight is half of the cross-sectional dimension of the bottom force hammer; Step 4: Make a reinforced top cover, hoist a suitable number of steel plate weights and a reinforced top cover to the center of the bottom force hammer completed in step 2, and connect and reinforce them with the axial connector and the connecting bolts; Step 5: Make a balancing hanger and fix the wire rope on the rammer ear plate and the balancing hanger plate respectively with the wire rope clamp.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention creatively adopts a square columnar bottom force hammer, which can greatly reduce the tamping blind area compared with the traditional rammer, and the positioning is simple and quick, so that the rammer can flexibly control the overlapping spacing of the tamping points during construction, avoiding uneven surging or bulging of the construction surface. It is more stable to use and can make the tamping capacity more evenly transmitted. The construction surface has a good one-piece molding effect, which can greatly save machinery and labor, improve tamping efficiency, and enable the project to reduce costs and increase efficiency.

[0018] 2. The small flat-plate leveling square hammer used in the present invention creatively uses a balancing hanging plate made of high-strength manganese steel. It can avoid uneven winding (knotting, detachment) of the wire rope during the lifting process of the rammer, greatly enhance the safety and stability of the rammer, greatly improve the continuous working performance of the rammer, save construction time, and shorten the construction period.

[0019] 3. The small flat plate leveling square hammer of the present invention is formed by fixing a large-diameter bottom force hammer and a small-diameter steel plate counterweight piece together. The large-diameter bottom force hammer at the bottom of the rammer is used to control the diameter of the pier body; the small-diameter steel plate counterweight piece is used to control the weight of the rammer. The large bottom area of ​​the bottom force hammer is transferred to the small-diameter steel plate counterweight piece to reduce the stress concentration at the cross-section change part during ramming, and the center of gravity stabilization effect is very obvious, which is more accurate in construction positioning.

[0020] 4. The rammer of the present invention can adjust the number of steel plate weights according to specific construction requirements, thereby realizing hammer weight conversion, so that the dynamic ramming construction can better meet the construction requirements of various working conditions and ensure the construction quality of the dynamic ramming construction. The setting of the axial connecting piece and the connecting bolt ensures the integrity of the combination hammer and greatly extends the service life and turnover times of the combination hammer.

[0021] 5. The present invention has four symmetrically designed exhaust holes, which are generally circular holes with a diameter of 200 mm, and can better reduce the air resistance during free fall than the three exhaust holes of the traditional hammer. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a side view structural schematic diagram of the present invention; Figure 2 It is a schematic diagram of the top view structure of the present invention; Figure 3 It is a bottom view structural schematic diagram of the present invention; Figure 4 This is a schematic diagram of the structure of the rammer ear plate of the present invention; Figure 5 It is a structural schematic diagram of the steel wire rope and the steel wire rope clamp of the present invention; Figure 6 It is a structural schematic diagram of the balancing hanging plate and the balancing hanging ring of the present invention; Figure 7 It is a structural schematic diagram of the axial connecting member of the present invention; Figure 8 It is a schematic diagram of the structure of the reinforced top cover of the present invention; Fig. 9 It is a schematic diagram of the structure of the steel plate weight plate of the present invention; Fig.10 It is a schematic diagram of the structure of the bottom force hammer of this invention.

[0023] Description of reference numerals: 1. Bottom force hammer; 11. Rammer ear plate; 2. Balance hanging plate; 3. Steel plate counterweight; 4. Reinforced top cover; 5. Axis connector; 6. Connecting bolts; 7. Balance lifting ring; 8. Wire rope; 81. Wire rope clamp; 9. Exhaust hole. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention are described clearly and completely below. The embodiments of the present invention and all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] Embodiment 1: like Figures 1 to 10As shown, the small flat plate leveling hammer for strong tamping of the present invention comprises: a bottom force hammer 1, a balancing hanging plate 2, a steel plate counterweight 3, a reinforced top cover 4, an axial connecting piece 5, a balancing lifting ring 7 and a steel wire rope 8. The bottom surface of the bottom force hammer 1 is a square, and the whole is in the shape of a square column. The upper surface of the bottom force hammer 1 is a square and symmetrically provided with four tamping hammer ear plates 11. The balancing hanging plate 2 is fixedly connected to the tamping hammer ear plates 11 through the steel wire rope 8. The top of the balancing hanging plate 2 is provided with a balancing lifting ring 7, and the balancing lifting ring 7 is used to connect the lifting wire rope of the tamping machine. The steel plate counterweight 3 is arranged on the top of the bottom force hammer 1, and the bottom of the steel plate counterweight 3 is provided with a reinforced top cover 4. The axial connecting piece 5 penetrates the reinforced top cover 4 and the steel plate counterweight 3 from top to bottom and extends to the center position of the hammer body inside the bottom force hammer 1.

[0026] Furthermore, the bottom force hammer 1 is symmetrically provided with four vertical exhaust holes 9 in a square shape. The exhaust holes 9 are circular holes. The depth of the exhaust holes 9 penetrates the bottom force hammer 1, and the exhaust holes 9 are arranged on the inner side of the hammer ear plate 11. The exhaust hole arrangement of the present invention can better reduce the air resistance during free fall.

[0027] Furthermore, three connecting bolts 6 arranged in an equilateral triangle are provided on the reinforcement top cover 4, and the connecting bolts 6 fixedly connect the steel plate weight plate 3 with the bottom force hammer 1. The lower end of the connecting bolt 6 is located in the middle of the bottom force hammer 1.

[0028] Further, the reinforcement top cover 4 includes a top cover body and a connecting bolt hole. The top cover body is a truncated cone structure. An axial connecting bolt hole is set at the center of the top cover body, and three connecting bolt holes are set in an equilateral triangle outside the axial connecting bolt hole in the top cover body. The bottom of the steel plate counterweight 3 is circular and the whole is flat cylindrical. The radius of the steel plate counterweight 3 is half of the cross-sectional size of the bottom force hammer 1, and it is arranged in the center, and the diameter of the steel plate counterweight 3 is equal to the bottom diameter of the top cover body. There are multiple steel plate counterweights 3, and the number of steel plate counterweights 3 can be determined according to actual construction requirements. An axial connecting bolt hole is set at the center of the steel plate counterweight 3, and three connecting bolt holes are set in an equilateral triangle outside the axial connecting bolt hole in the steel plate counterweight 3. The depth of the connecting bolt hole is greater than 1 / 2 of the height of the bottom force hammer 1. The connecting bolts 6 correspond to the connecting bolt holes of the bottom force hammer 1, the steel plate counterweight 3 and the reinforcement top cover 4, and fix the three together.

[0029] Furthermore, the rammer ear plate 11 is a horizontally arranged rectangular steel plate and a vertically arranged punched ear plate, and the punched ear plate is used to fix the wire rope 8, and the wire rope 8 is fixed by the wire rope clamp 81 to form a curved arc, and four wire rope clamps 81 are fixed on each curved section, and the spacing between the wire rope clamps 81 is 100mm. The balance hanging plate 2 is trapezoidal, and the balance hanging plate 2 is made of high-strength manganese steel. The bottom of the balance hanging plate 2 is symmetrically penetrated with double holes for connecting the wire rope 8. The middle position of the upper part of the balance hanging plate 2 is fixedly connected to the connection hole below the balance lifting ring 7 by a high-strength manganese steel bolt, and the connection hole above the balance lifting ring 7 is connected to the rammer lifting wire rope.

[0030] Embodiment 2: Taking an embodiment of a preferred size as an example, the structures of the components of the small flat plate leveling hammer for strong compaction of the present invention are described in detail: like Figure 4 As shown, the material selected for the rammer ear plate 11 is Q235 steel, and Q345B steel and 45# steel can also be selected, which is appropriately selected according to the material inventory. Its size is 150mm*200mm*10mm thick rectangular steel plate and 140mm*140mm*50mm thick punching ear plate, which are made of one piece. The four rammer ear plates 11 are welded to the upper surface of the bottom force hammer 1 and are used to connect the balance hanger 2 through the wire rope 8.

[0031] like Figure 5 As shown, the wire rope clamp 81 and the wire rope 8 both use No. 20 wire rope. The function of the wire rope clamp 81 is to firmly fix the wire rope 8 to the rammer ear plate 11 and the balance hanger plate 2 by fixing the bending point of the wire rope. Four wire rope clamps 81 are arranged on each wire rope knot bending section, and the spacing between them is 100 mm.

[0032] like Figure 6 As shown, the balancing hanging plate 2 is made of a trapezoidal steel plate with a size of 500mm*300mm*50mm, and the balancing ring is made of a steel plate ring with a size of 250mm*80mm*80mm. The balancing hanging plate 2 and the balancing ring 7 are connected and assembled by high-strength manganese steel bolts. The bottom of the balancing hanging plate 2 is symmetrically penetrated with double holes for connecting the steel wire rope 8. The middle position of the upper part of the balancing hanging plate 2 is fixedly connected to the connecting hole below the balancing ring 7 by a high-strength manganese steel bolt. The connecting hole above the balancing ring 7 is connected to the lifting wire rope of the rammer, which can avoid uneven winding of the wire rope (knotting, detachment) during the lifting process of the rammer.

[0033] like Figure 7As shown, the axial connecting member 5 is made of Q235 steel, the mushroom head diameter is 150mm, the thickness is 75mm, the head is set to be an arc shape, the screw diameter is 50mm, the length is 375mm, and there are small holes with a diameter of 50mm at 460mm from the mushroom head for connecting bolts 6 to pass through and fix. The thread length is 425mm. The screw length can be appropriately lengthened, and the thread can also be lengthened to ensure the flexibility of later construction.

[0034] like Figure 8 As shown, the reinforced top cover 4 is made of manganese steel and consists of a connecting bolt hole and a top cover body. The top cover body is a truncated cone with a bottom diameter of 1500mm, a top diameter of 400mm, and a height of 150mm. An axial connecting bolt hole with a diameter of 50mm is punched at the center of the top cover, and three connecting bolt holes with a diameter of 80mm are arranged in an equilateral triangle on the outside of the axial connecting bolt hole in the top cover body.

[0035] The connecting bolt 6 is made of Q235 steel, and the head is made of a hexagon with a diameter of 50mm and a thickness of 30mm. The screw has a diameter of 30mm, a length of 425mm, and a thread length of 375mm. Three connecting bolts 6 fix and reinforce the top cover 4 on the steel plate counterweight 3, tightly combining all components to ensure overall firmness.

[0036] like Fig. 9 As shown, the steel plate counterweight plate 3 is made of manganese steel, and consists of a connecting bolt hole and a counterweight plate body. The steel plate counterweight plate is a flat cylinder with a diameter of 1500mm and a height of 100mm. An axial connecting bolt hole 31 with a diameter of 50mm is punched at the center of the steel plate counterweight plate, and three connecting bolt holes 32 are arranged in an equilateral triangle on the outside of the axial connecting bolt hole in the steel plate counterweight plate 3.

[0037] like Fig.10 As shown, the bottom force hammer 1 is made of iron, and is cut and processed from a square column with a length of 1500mm, a width of 1500mm, and a height of 300mm. The rammer ear plate 11 is arranged in a square according to the design position, and is 350mm away from the edge of the force hammer. The exhaust hole 9 is punched into a circular exhaust hole 9 with a diameter of 50mm according to the design position. The four exhaust holes 9 are arranged in a square between the rammer ear plates 11. The hole depth penetrates the bottom force hammer 1 and is 733mm away from the edge of the force hammer. The connecting bolt hole with a diameter of 30mm and the axial connecting part hole with a diameter of 50mm are punched, and the hole depth is 220mm.

[0038] Embodiment 3: This embodiment introduces in detail the manufacturing and assembly method of the small flat plate leveling hammer for strong compaction of the present invention, which includes the following steps: Step 1: Draw the structural processing diagram of the small flat plate leveling hammer for strong compaction, and determine the dimensions of each component of the small flat plate leveling hammer for strong compaction according to the dimensions of all nodes of the components in the processing diagram; Step 2: Make a bottom force hammer 1, and weld four rammer ear plates 11 symmetrically in a square shape on the upper surface of the bottom force hammer 1, wherein the bottom force hammer 1 is cut and processed from a square column with a length of 1500 mm, a width of 1500 mm, and a height of 300 mm; Step 3: Make a steel plate counterweight 3, wherein the bottom of the steel plate counterweight 3 is circular, and the radius of the steel plate counterweight 3 is half of the cross-sectional size of the bottom force hammer 1; Step 4: Make a reinforced top cover 4, hoist a suitable number of steel plate weight plates 3 and the reinforced top cover 4 to the center of the bottom force hammer 1 completed in step 2, and connect and reinforce them with the axial connector 5 and the connecting bolts 6; Step 5: Make the balancing hanging plate 4, and fix the steel wire rope 8 to the rammer ear plate 11 and the balancing hanging plate 4 respectively by the steel wire rope clamp 81.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A small flat leveling hammer for strong compaction, characterized in that: include: A bottom force hammer (1), wherein the bottom surface of the bottom force hammer (1) is square and the overall shape is a square column, and the upper surface of the bottom force hammer (1) is square and symmetrically provided with four rammer lugs (11); A balancing hanging plate (2), wherein the balancing hanging plate (2) is fixedly connected to the rammer ear plate (11) via a steel wire rope (8), and a balancing hanging ring (7) is provided on the top of the balancing hanging plate (2); A steel plate counterweight (3) is arranged on the top of the bottom force-bearing hammer (1), a reinforced top cover (4) is arranged at the bottom of the steel plate counterweight (3), and an axial connecting piece (5) penetrates the reinforced top cover (4) and the steel plate counterweight (3) from top to bottom and extends to the center position of the hammer body inside the bottom force-bearing hammer (1).

2. The small flat plate leveling hammer for strong compaction according to claim 1, characterized in that: The bottom force-bearing hammer (1) is symmetrically provided with four vertical exhaust holes (9) in a square shape, the exhaust holes (9) are circular, penetrate the bottom force-bearing hammer (1) in depth, and the exhaust holes (9) are arranged on the inner side of the hammer ear plate (11).

3. The small flat plate leveling hammer for strong compaction according to claim 1, characterized in that: The bottom of the steel plate counterweight (3) is circular and the whole is in the shape of a flat cylinder. The radius of the steel plate counterweight (3) is half the cross-sectional dimension of the bottom force-bearing hammer (1).

4. The small flat plate leveling hammer for strong compaction according to claim 1, characterized in that: The reinforced top cover (4) is provided with three connecting bolts (6) arranged in an equilateral triangle, and the connecting bolts (6) fixedly connect the steel plate counterweight (3) and the bottom force hammer (1).

5. The small flat plate leveling hammer for strong compaction according to claim 4, characterized in that: The reinforced top cover (4) comprises a top cover body and connecting bolt holes. The top cover body is a truncated cone structure. An axial connecting bolt hole is arranged at the center of the top cover body. Three connecting bolt holes are arranged in an equilateral triangle outside the axial connecting bolt hole in the top cover body.

6. The small flat plate leveling hammer for strong compaction according to claim 5, characterized in that: The diameter of the steel plate weight plate (3) is equal to the bottom diameter of the top cover body; an axial connection bolt hole is arranged at the center of the steel plate weight plate (3); and three connection bolt holes are arranged in an equilateral triangle outside the inner axial connection bolt hole of the steel plate weight plate (3).

7. The small flat plate leveling hammer for strong compaction according to claim 1, characterized in that: The rammer ear plate (11) is a horizontally arranged rectangular steel plate and a vertically arranged punched ear plate, the punched ear plate is used to fix the steel wire rope (8), the steel wire rope (8) is fixed by a steel wire rope clamp (81) to form a bent arc, and four steel wire rope clamps (81) are fixed on each bent section, and the spacing between the steel wire rope clamps (81) is 100 mm.

8. The small flat plate leveling hammer for strong compaction according to claim 1, characterized in that: The balancing hanging plate (2) is trapezoidal in shape and is made of high-strength manganese steel. The bottom of the balancing hanging plate (2) is symmetrically provided with two holes for connecting a steel wire rope (8). The middle position of the upper part of the balancing hanging plate (2) is fixedly connected to the connecting hole below the balancing hanging ring (7) by a high-strength manganese steel bolt. The connecting hole above the balancing hanging ring (7) is connected to the lifting steel wire rope of the rammer.

9. The small flat plate leveling hammer for strong compaction according to claim 6, characterized in that: The depth of the connecting bolt hole is greater than 1 / 2 of the height of the bottom force hammer (1).

10. The method for manufacturing and assembling a small-sized flat plate leveling hammer for strong compaction according to any one of claims 1 to 9, characterized in that: The steps include: Step 1: Draw the structural processing diagram of the small flat plate leveling hammer for strong compaction, and determine the dimensions of each component of the small flat plate leveling hammer for strong compaction according to the dimensions of all nodes of the components in the processing diagram; Step 2: manufacturing a bottom force hammer (1), and welding four rammer ear plates (11) symmetrically in a square shape on the upper surface of the bottom force hammer (1), wherein the bottom force hammer (1) is cut and processed from a square column with a length of 1500 mm, a width of 1500 mm, and a height of 300 mm; Step 3, manufacturing a steel plate counterweight (3), wherein the bottom of the steel plate counterweight (3) is circular, and the radius of the steel plate counterweight (3) is half of the cross-sectional dimension of the bottom force hammer (1); Step 4: Make a reinforced top cover (4), hoist a suitable number of steel plate weight plates (3) and the reinforced top cover (4) to the center of the bottom force hammer (1) completed in step 2, and connect and reinforce them with the axial connector (5) and the connecting bolts (6); Step 5: Make a balancing hanging plate (4), and fix the steel wire rope (8) to the rammer ear plate (11) and the balancing hanging plate (4) respectively by means of a steel wire rope clamp (81).

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