A combination rammer

Abstract

The utility model provides a kind of combined rammer, adopt the mode of multiple hammer body extraction and insertion combination, can be quickly combined or disassembled in construction, and the weight and length of rammer can be adjusted by combination or disassembly, so that a set of rammer can be applicable to the construction demand of different projects, or provide different hammering energy when the same project is constructed;The combined rammer includes one main hammer body and more than one auxiliary hammer body, the diameter of the main hammer body is the largest, and it is solid or partially solid structure, the upper end of the main hammer body is provided with a connecting pipe with a pin hole;When the auxiliary hammer body is one, the auxiliary hammer body can be inserted into the inner cavity of the main hammer body;When the auxiliary hammer body is more than two, the diameter of the auxiliary hammer body decreases in turn, and the auxiliary hammer body with relatively smaller diameter can be inserted into the inner cavity of another auxiliary hammer body;The upper and lower ends of the auxiliary hammer body are provided with pin holes;The main hammer body and the auxiliary hammer body and the auxiliary hammer body are connected by transverse dowel in pin hole.

Description

Technical Field

[0001] This utility model relates to a device for foundation pile construction, specifically a combined tamping hammer. Background Technology

[0002] In building construction, foundation and subgrade construction are crucial for ensuring building safety, and foundation piles are a common method for foundation treatment. There are various types of foundation piles, each with its own characteristics. In foundation pile construction, a tamping hammer is a commonly used tool, especially essential for the construction of compaction piles and similar piles. For example, compaction piles are a pile foundation construction technology developed in recent years. They use cement-sand mixtures as fillers, and then repeatedly tampe the filler with a tamping hammer to form a carrier at the bottom of the pile, thereby increasing the pile's bearing capacity. The invention and innovation of compaction pile technology has been widely applied in the construction engineering field, creating significant social and economic benefits.

[0003] Currently, the most commonly used 3.5-ton slender tamping hammer is used for pile foundations. For precast pipe piles, even lighter hammers, typically 2-3 tons, are used. However, multiple tests and constructions have revealed that due to the relatively light weight of the hammer and the lower impact energy, it is insufficient to completely overcome the resistance of the soil at the pile tip. This resistance is even greater during backfill compaction, resulting in situations where a small amount of backfill material fails to achieve adequate compaction but easily meets penetration requirements, without actually reaching the bearing capacity corresponding to the penetration standard. Furthermore, when compacting backfill material in softer soil layers, it is easy to encounter situations where multiple blows and a large amount of backfill material are used, but the three-blow penetration standard is still not met. This is also because the impact energy is relatively low, necessitating an increase in the number of blows. However, more blows cause greater disturbance to the soil at the pile tip, turning the soil into rubbery soil that loses its original bearing capacity, leading to construction failure. Therefore, it is necessary to specifically increase the weight of the tamping hammer.

[0004] Furthermore, as the length of the piles increases, and various projects require different pile diameters, different construction conditions, and different hammering intensities, it is necessary to frequently change the tamping tools. How to use a set of tamping hammers to be suitable for different projects is another challenge encountered in this field. Summary of the Invention

[0005] The purpose of this invention is to provide a combined rammer, which uses multiple hammer bodies in a snap-fit ​​configuration. It can be quickly assembled or disassembled during construction, and the weight and length of the rammer can be adjusted by assembling or disassembling it. Thus, one set of rammers can be used to meet the construction needs of different projects, or to provide different hammering energies during the construction of the same project.

[0006] This combined tamping hammer includes a main hammer body and one or more auxiliary hammer bodies. The main hammer body has the largest diameter and is solid or partially solid. The upper end of the main hammer body has a connecting pipe with a pin hole. When there is one auxiliary hammer body, its diameter is smaller than that of the main hammer body and can be inserted into the inner cavity of the main hammer body. When there are two or more auxiliary hammer bodies, their diameters decrease sequentially, with the smaller diameter auxiliary hammer body able to be inserted into the inner cavity of the larger diameter auxiliary hammer body. Pin holes are provided at both the upper and lower ends of the auxiliary hammer bodies. The main hammer body and auxiliary hammer bodies, as well as the auxiliary hammer bodies themselves, are connected at the pin holes by transverse pins. The length of the combined tamping hammer can be controlled by adjusting the pin hole connection position. When there is one auxiliary hammer body, its hammer top is connected to the lifting mechanism via a main steel wire rope. When there are two or more auxiliary hammer bodies, the hammer top of the smallest diameter auxiliary hammer body is connected to the lifting mechanism via a main steel wire rope.

[0007] Ideally, the main hammer body should be made entirely of steel, or have an outer steel layer and an inner iron layer, or an outer steel layer and an inner concrete layer.

[0008] Ideally, when there is one secondary hammer body, the main hammer body should be a partially solid structure; when there are two or more secondary hammer bodies, the main hammer body should be a solid structure.

[0009] Ideally, the multiple transverse pin holes on the hammer body of the secondary hammer should be located at the upper and lower ends of the secondary hammer, or at the upper, middle and lower ends.

[0010] Ideally, when there is one secondary hammer body, it should be a hollow tube, a solid or partially solid structure; when there are two or more secondary hammer bodies, the secondary hammer body with the smallest diameter should be a hollow tube, a solid or partially solid structure, and the other secondary hammer bodies should be hollow tube structures.

[0011] Ideally, adjusting the pin hole connection position between the auxiliary hammers can control the length of the combined tamping hammer. This means that when the bottom pin hole of the smaller diameter auxiliary hammer is aligned with the top pin hole of the larger diameter auxiliary hammer, i.e., when most of the smaller diameter hammer extends outside the larger diameter hammer, the length of the combined tamping hammer is relatively longer. Conversely, when the bottom pin hole of the smaller diameter auxiliary hammer is aligned with the bottom pin hole of the larger diameter auxiliary hammer, i.e., when all or most of the smaller diameter hammer is inserted into the larger diameter hammer, the length of the combined tamping hammer is relatively shorter.

[0012] Ideally, a flat-bottomed or pointed-bottomed hammer shoe should be added to the bottom of the main hammer body. The hammer shoe should be detachably connected to the main hammer body via longitudinal and transverse studs, and the diameter of the hammer shoe should not be less than the diameter of the main hammer body. Adding a hammer shoe not only increases the bottom diameter of the combined tamping hammer but also allows for adjustment of the hammer base area to adapt to the construction needs of different projects.

[0013] Ideally, an auxiliary steel wire rope can be added to the top of the auxiliary hammer head, which has the smallest diameter. This auxiliary steel wire rope should be arranged along the main steel wire rope, and its length, combined with the length of the combined hammer, should be greater than the length of the pile hole. This ensures that the upper end of the auxiliary steel wire rope protrudes above the ground surface, allowing for the auxiliary lifting of the combined hammer via other lifting mechanisms. If the main steel wire rope breaks during construction, the hammer can be lifted using the auxiliary steel wire rope. Similarly, if hammer malfunctions, the auxiliary steel wire rope and other lifting mechanisms can be used to assist in lifting the hammer, proving highly effective.

[0014] This utility model of a combined tamping hammer has the following characteristics and advantages: ① Compared with commonly used slender heavy hammers, the combination of a main hammer body and a secondary hammer body significantly increases the overall weight of the hammer, generally to 4-10 tons, which increases the tamping energy and improves the compaction effect during construction; ② It is highly adjustable, and the weight of the tamping hammer can be adjusted by increasing or decreasing the number of hammer bodies to suit different bearing capacity requirements. The length of the tamping hammer can be increased or decreased to suit the construction requirements of different pile lengths. The diameter of the main hammer body or the bottom hammer shoe can be adjusted to adapt to the construction requirements of different pile diameters or inner diameters of pipe piles. It is especially suitable for the construction of carrier piles, compaction piles, and other pile types, significantly increasing the tamping energy without being limited by the length, diameter, or inner diameter of precast pipe piles or retaining steel pipes; ③ It has low requirements for the height, rigidity, and structure of construction equipment, and commonly used small and medium-sized equipment can be used without modification; ④ The structure is clear and easy to process. The main hammer body and the secondary hammer body can be quickly connected and disassembled, facilitating construction and transportation and meeting the actual construction needs of different projects. Attached Figure Description

[0015] Figure 1 This is a side view of one embodiment of the combined ramming hammer; Figure 2 This is a side view of the second embodiment of the combined tamping hammer; Figure 3 This is a side view of the third embodiment of the combined tamping hammer; Figure 4 This is a side view of the fourth embodiment of the combined ramming hammer; Figures 1 to 4 In the diagram, 1 is the main hammer, 2 is the first auxiliary hammer body, 3 is the second auxiliary hammer body, 4 is the third auxiliary hammer body, 5 is the pin hole, 6 is the connecting pipe, 7 is the main wire rope, 8 is the auxiliary wire rope, and 9 is the hammer shoe. Detailed Implementation

[0016] Figure 1 This is a side view of one embodiment of the combined tamping hammer, wherein Figure 1 a is a schematic diagram of the fully extended state of the combined ramming hammer. Figure 1 b is a schematic diagram of the semi-extended state of the combined ramming hammer. Figure 1 c is a schematic diagram of the non-extended state of the combined tamping hammer, as shown below. Figure 1As shown, the combined tamping hammer includes a main hammer body 1 and three auxiliary hammer bodies 2, 3, and 4. The main hammer body 1 has the largest diameter and is a solid, all-steel structure. The upper end of the main hammer body 1 has a connecting pipe 6 with a pin hole 5. The outer diameter of the connecting pipe 6 is slightly smaller than the inner diameter of the first auxiliary hammer body 2. The diameters of the three auxiliary hammer bodies decrease sequentially. The outer diameter of the first auxiliary hammer body 2 is the same as that of the main hammer body 1, and it is a thick-walled hollow steel pipe structure. The second auxiliary hammer body 3 is also a thick-walled hollow steel pipe structure, but its outer diameter is slightly smaller than that of the first auxiliary hammer body 2. The inner diameter of hammer body 2 allows it to be inserted into the inner cavity of the first hammer body 2. The third hammer body 4 is a solid steel structure, with an outer diameter slightly smaller than the inner diameter of the second hammer body 3, thus allowing it to be inserted into the inner cavity of the second hammer body 3. Each of the three hammer bodies 2, 3, and 4 has two transverse pin holes at both ends. The top hammer head of the third hammer body 4 is connected to the main steel wire rope 7, which is connected to the lifting mechanism or lifting equipment of the construction equipment. When the combined tamping hammer is in its fully extended state, as... Figure 1 As shown in Figure a, the connecting pipe 6 at the upper end of the main hammer body 1 is inserted into the inner cavity of the first auxiliary hammer body 2. The pin hole 5 on the connecting pipe 6 is aligned with the pin hole 5 at the bottom of the first auxiliary hammer body 2 and fixed with a transverse pin. Then, the second auxiliary hammer body 3 is inserted into the upper end of the first auxiliary hammer body 2. The pin hole 5 at the bottom of the second auxiliary hammer body 3 is aligned with the pin hole 5 at the upper end of the first auxiliary hammer body 2 and fixed with a transverse pin. Then, the third auxiliary hammer body 4 is inserted into the upper end of the second auxiliary hammer body 3. The pin hole 5 at the bottom of the third auxiliary hammer body 4 is aligned with the pin hole 5 at the upper end of the second auxiliary hammer body 3 and fixed with a transverse pin. At this time, the lengths of the three auxiliary hammer bodies only overlap at the connection points. Therefore, the combined tamping hammer is the longest and heaviest in its fully extended state. In the semi-extended state, as shown in Figure a... Figure 1 As shown in b, with Figure 1 Compared to the first hammer, the connection and fixing positions of the main hammer body 1 and the first auxiliary hammer body 2, and the first auxiliary hammer body 2 and the second auxiliary hammer body 3 remain unchanged. However, the third auxiliary hammer body 4 is fully inserted into the inner cavity of the second auxiliary hammer body 3, and the pin hole 5 at the bottom of the third auxiliary hammer body 4 is aligned and fixed with the pin hole 5 at the bottom of the second auxiliary hammer body 3. At this time, the combined tamping hammer is shorter in length and has the same weight compared to the fully extended state. When the combined tamping hammer is in the non-extended state, such as Figure 1 As shown in c, with Figure 1 Compared to the first hammer, the connection and fixing position of the main hammer 1 and the first auxiliary hammer 2 remain unchanged, but the second auxiliary hammer 3 is fully inserted into the inner cavity of the first auxiliary hammer 2, and the third auxiliary hammer 4 is fully inserted into the inner cavity of the second auxiliary hammer 3. At this time, the combined hammer has the smallest length and the same weight compared to the fully extended state. Therefore, by adjusting the connection and fixing position of the auxiliary hammers 2, 3 and 4, combined hammers of different lengths can be obtained.

[0017] Figure 2 This is a side view of a second embodiment of the combined tamping hammer, wherein Figure 2 a is a schematic diagram of the fully extended state of the combined ramming hammer. Figure 2 b is a schematic diagram of the semi-extended state of the combined ramming hammer. Figure 2 c is a schematic diagram of the non-extended state of the combined tamping hammer. This embodiment is similar to... Figure 1 Compared with the illustrated embodiment, the combination, structure and connection method are basically the same. Different lengths of combined hammers can be obtained by adjusting the connection and fixing position of the auxiliary hammers 2, 3 and 4. The difference is that the outer diameter of the first auxiliary hammer 2 is smaller than the outer diameter of the main hammer 1. The bottom end of the first auxiliary hammer 2 is inserted into the upper connecting pipe 6 of the main hammer 1 and fixed with a transverse pin.

[0018] Figure 3 This is a side view of the third embodiment of the combined tamping hammer, wherein Figure 3 a is a schematic diagram of the fully extended state of the combined ramming hammer. Figure 3 b is a schematic diagram of the non-extended state of the combined tamping hammer. Figure 3 c is a structural diagram of the main wire rope and auxiliary wire rope of the combined ramming hammer; as shown in the diagram. Figure 3 As shown, the combined tamping hammer includes a main hammer body 1 and two auxiliary hammer bodies 2 and 3. The main hammer body 1 has the largest diameter and is a solid all-steel structure. The upper end of the main hammer body 1 is provided with a connecting pipe 6 with a pin hole 5. The lower end of the main hammer body 1 is provided with a flat-bottomed hammer shoe 9 with a diameter larger than that of the main hammer body 1. The flat-bottomed hammer shoe 9 is detachably connected to the main hammer body 1 by a transverse stud. The diameters of the two auxiliary hammer bodies decrease sequentially. The outer diameter of the first auxiliary hammer body 2 is smaller than the inner diameter of the connecting pipe 6 at the upper end of the main hammer body 1, and it is a thick-walled hollow steel pipe structure. The second auxiliary hammer body 3 is a solid steel structure, and its outer diameter is smaller than the inner diameter of the first auxiliary hammer body 2, so it can be inserted into the inner cavity of the first auxiliary hammer body 3. The top hammer head of the second auxiliary hammer body 3 is connected to a main steel wire rope 7. A secondary steel wire rope 8 is fixed to one side of the main steel wire rope 7. One end of the secondary steel wire rope 8 is connected to the hammer head of the second auxiliary hammer body 3, and the other end protrudes from the ground surface. It can be connected to other lifting equipment when needed. Figure 3 The third embodiment shown is similar to Figure 1 Compared to the first embodiment shown, the differences are: firstly, one auxiliary hammer body is reduced, thereby moderately reducing the weight of the combined tamping hammer and decreasing its length; secondly, a hammer shoe 9 and an auxiliary wire rope 8 are added.

[0019] Figure 4 This is a side view of the fourth embodiment of the combined tamping hammer, wherein Figure 4 a is a schematic diagram of the fully extended state of the combined ramming hammer. Figure 4 b is a schematic diagram of the semi-extended state of the combined ramming hammer. Figure 4 c is a schematic diagram of the non-extended state of the combined tamping hammer; as shown Figure 4As shown, the combined tamping hammer includes a main hammer body 1 and a secondary hammer body 2. The main hammer body 1 has the largest diameter. The upper and middle parts of the main hammer body 1 are hollow steel pipe structures, and the lower part is a solid steel structure. The upper end of the main hammer body 1 is provided with a pin hole 5. The outer diameter of the secondary hammer body 2 is smaller than the inner diameter of the main hammer body 1. The upper, middle and bottom ends of the secondary hammer body 2 are provided with pin holes 5. The top hammer head of the secondary hammer body 2 is connected to a main steel wire rope 7. The main steel wire rope 7 is connected to the lifting mechanism or lifting equipment of the construction equipment. Figure 4 a is a schematic diagram of the fully extended state of the combined tamping hammer. After the pin hole 5 at the upper end of the main hammer body 1 and the pin hole 5 at the bottom end of the auxiliary hammer body 2 are aligned, they are fixed with a horizontal pin. At this time, the length of the combined tamping hammer is the longest. Figure 4 b is a schematic diagram of the semi-extended state of the combined hammer. The pin hole 5 at the upper end of the main hammer body 1 and the pin hole 5 in the middle of the auxiliary hammer body 2 are aligned and fixed with a horizontal pin. At this time, the length of the combined hammer is moderate. Figure 4 b is a schematic diagram of the non-extended state of the combined hammer. The pin hole 5 at the upper end of the main hammer body 1 and the pin hole 5 at the upper part of the auxiliary hammer body 2 are aligned and fixed with a horizontal pin. At this time, the length of the combined hammer is the shortest. Therefore, by adjusting the connection and fixing position of the main hammer body 1 and the auxiliary hammer body 2, combined hammers of different lengths can be obtained.

Claims

1. A combined tamping hammer, characterized in that, The system includes one main hammer and one or more auxiliary hammers. The main hammer has the largest diameter and is solid or partially solid. The upper end of the main hammer has a connecting pipe with pin holes. When there is one auxiliary hammer, its diameter is smaller than that of the main hammer and can be inserted into the inner cavity of the main hammer. When there are two or more auxiliary hammers, their diameters decrease sequentially, with the smaller diameter auxiliary hammer able to be inserted into the inner cavity of the larger diameter auxiliary hammer. Multiple transverse pin holes are provided along the hammer body of each auxiliary hammer. The main hammer, auxiliary hammers, and the auxiliary hammers themselves are fixedly connected at the pin holes by transverse pins. Adjusting the pin hole connection position controls the length of the combined hammer assembly. When there is one auxiliary hammer, its hammer top is connected to the lifting mechanism via a main steel wire rope. When there are two or more auxiliary hammers, the hammer top of the smallest diameter auxiliary hammer is connected to the lifting mechanism via a main steel wire rope.

2. The combined ramming hammer as described in claim 1, characterized in that, The main hammer body is made of steel, or has an outer steel layer and an inner iron layer, or an outer steel layer and an inner concrete layer.

3. The combined ramming hammer as described in claim 1, characterized in that, When there is one secondary hammer body, the main hammer body is a partially solid structure; when there are two or more secondary hammer bodies, the main hammer body is a solid structure.

4. The combined ramming hammer as described in claim 1, characterized in that, Multiple transverse pin holes on the hammer body of the secondary hammer are located at the upper and lower ends of the secondary hammer, or at the upper, middle and lower ends.

5. The combined ramming hammer as described in claim 1, characterized in that, When there is one secondary hammer body, it is a hollow tube, a solid or partially solid structure; when there are two or more secondary hammer bodies, the secondary hammer body with the smallest diameter is a hollow tube, a solid or partially solid structure, and the other secondary hammer bodies are hollow tube structures.

6. The combined ramming hammer as described in claim 1, characterized in that, Adjusting the pin hole connection position between the auxiliary hammers can control the length of the combined tamping hammer to be extended or shortened. This means that when the bottom pin hole of the auxiliary hammer with a smaller diameter is aligned with the top pin hole of the auxiliary hammer with a larger diameter, the length of the combined tamping hammer is relatively extended, and when the bottom pin hole of the auxiliary hammer with a smaller diameter is aligned with the bottom pin hole of the auxiliary hammer with a larger diameter, the length of the combined tamping hammer is relatively shortened.

7. The combined ramming hammer as described in claim 1, characterized in that, A flat or pointed hammer shoe can be added to the bottom of the main hammer body. The hammer shoe is detachably connected to the main hammer body by a stud.

8. The combined ramming hammer as described in claim 1, characterized in that, A secondary steel wire rope can also be added to the top of the secondary hammer body with the smallest diameter. The secondary steel wire rope is arranged along the main steel wire rope. The sum of the length of the secondary steel wire rope and the length of the combined ramming hammer must be greater than the length of the pile hole to ensure that the upper end of the secondary steel wire rope is exposed on the ground surface so that the combined ramming hammer can be lifted with the assistance of other lifting mechanisms.

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