Foundation pit fat groove backfill soil vibration tamping device

Abstract

The utility model discloses a foundation pit fat groove backfill soil vibration tamping device which comprises a vibration hammer with a lifting lug, a steel long handle with the upper end fixed to the bottom of the vibration hammer and a tamping hammer part with the upper end fixed to the bottom end of the steel long handle. The rammer part comprises a hollow steel shell, and counterweight concrete is filled in the steel shell. According to the tamping device, workers do not need to go into a groove for operation, the tamping effect is good, and the construction efficiency is high.

Description

Technical Field

[0001] The utility model relates to a foundation pit backfill construction technology in the field of civil engineering, in particular to a device for vibrating and compacting backfill soil in a foundation pit fertilizer trough in layers. Background Art

[0002] With the rapid development of underground space construction projects, the construction and application of various foundation pit support structures are becoming more and more extensive. Usually, the supporting structures such as retaining pile walls, top beams, and internal supports are constructed first, and the foundation pit is excavated to the bottom of the pit. Then, the basement floor, basement exterior wall, basement middle floor, and basement roof are constructed layer by layer from bottom to top. After the basement roof is completed, the gap between the basement exterior wall and the retaining pile wall, i.e., the fertilizer trough, needs to be backfilled and compacted in layers with pond slag, so that the soil and water side pressure load outside the foundation pit is transferred to the basement structure, thereby protecting the external environment of the foundation pit, such as urban roads and pipelines, from displacement or damage.

[0003] The construction process of backfilling the fertilizer trough in the prior art is as follows: first drain the water in the fertilizer trough, then remove the garbage in the fertilizer trough, and then backfill the pond slag in layers to level it. The thickness of each backfilled layer of pond slag is 300-500mm. After each backfilled layer of pond slag, a worker is sent down the trough to push a small frog-type tamping machine to compact the newly backfilled layer of pond slag.

[0004] The above-mentioned construction method of compacting backfill soil with a hand-pushed frog-type rammer has the following disadvantages. First, workers need to go down to the fertilizer trough to work, but the construction environment in the trough is unsafe, and debris often rolls down from the basement roof or the top beam, posing a safety hazard of injuring construction workers; moreover, the width of the fertilizer trough is narrow, generally about 700mm, and workers do not have enough working space in the trough, resulting in inconvenient operation, especially in winter when wearing thick clothes to work, down jackets and cotton clothes are often hooked and damaged by the trough wall; furthermore, the output power of the frog-type rammer itself is low, the speed is slow, and the efficiency is poor. Workers need to spend more time to barely compact the soil, and the final compaction effect is not good. The compaction coefficient often fails to meet the design requirements, and in serious cases, it even damages the adjacent municipal roads and underground pipelines. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a foundation pit fertilizer trough backfill soil vibration compaction device which does not require workers to go down the trough for operation and has good compaction effect and high construction efficiency.

[0006] The technical solution of the utility model is to provide a vibration compaction device for backfill soil of a foundation pit fertilizer trough, which includes a vibration hammer with a lifting ear, a steel long handle whose upper end is fixed to the bottom of the vibration hammer, and a rammer part whose upper end is fixed to the bottom of the steel long handle; the rammer part includes a hollow steel shell, and counterweight concrete is poured in the steel shell.

[0007] Compared with the prior art, the foundation pit fertilizer trough backfill soil vibration compaction device using the above structure has the following advantages.

[0008] The presence of the lifting lug makes it easy to lift the compacting device by passing a wire rope through the lifting lug after the crane is in place; and the slender steel handle facilitates the insertion of the rammer into a deep and narrow fertilizer trough, thereby realizing unmanned trough operation; the high-frequency vibration of the vibrating hammer is started, and the exciting force generated is transmitted to the backfill pond debris through the steel handle and the rammer to compact it.

[0009] From the above analysis, it can be seen that the device can compact the backfill soil without workers going down the trench, thus avoiding the safety hazard of workers being injured while working in the trench, and the operating space outside the trench is spacious, the construction is convenient, and there is no situation where clothes are scratched by the trench wall; the rammer part is composed of a hollow steel shell filled with concrete. The steel shell and concrete are both common materials, which can be obtained locally and are easy to prepare; and the concrete filling effectively increases the deadweight of the rammer. Combined with the characteristics of the high frequency and high speed of the vibration hammer excitation force, it can be seen that according to the kinetic energy formula E = 0.5MV 2 Under the premise of large mass and high speed, the device has large tamping energy per unit time and its output power is much greater than that of a frog-type rammer. It can compact the backfill soil quickly and the compaction effect is ideal. It can make the compaction coefficient meet or even exceed the design requirements in a short time.

[0010] Preferably, the steel shell includes an upper conical shell and a lower rectangular shell; the conical shell is welded from four trapezoidal steel plates that are smaller at the top and larger at the bottom and a top steel plate, and the rectangular shell is welded from two long side steel plates, two short side steel plates and a bottom steel plate; the lower edges of the four trapezoidal steel plates of the conical shell are respectively welded to the upper edges of the four side steel plates of the rectangular shell; the top steel plate is welded to the lower end of the steel long handle; the above structure is easy to prepare, and only needs to cut the steel plates according to the shape and size, and then weld them to obtain a firm, stable and regularly shaped outer shell, and concrete can be poured first and then the top steel plate can be welded to seal it, which further facilitates the assembly and preparation process and ensures that the rammer part and the steel long handle are firmly and reliably connected.

[0011] As a further preference, the length of the short side steel plate is 100 mm shorter than the width of the fertilizer trough; in this way, the width of the rammer part is ensured to basically match the width of the fertilizer trough. In this way, the soil within the width of the fertilizer trough can be basically compacted by lifting the rammer part back and forth along the fertilizer trough once, and 5 centimeters are reserved on each side to avoid scratching between the rammer part and the wall of the fertilizer trough.

[0012] As another preferred embodiment, a long handle flange is welded to the upper end of the steel long handle, and a circle of multiple long handle ribs are welded between the long handle flange and the steel long handle; an upper flange is welded to the crossbeam of the vibration hammer chassis, and the upper flange is welded to the lower flange via a vertical joint steel pipe, and a circle of multiple flange ribs are welded to the outer periphery of the joint steel pipe, and the upper and lower ends of the flange ribs are respectively welded to the upper flange and the lower flange; the lower flange and the long handle flange are connected via longitudinal bolts; in this way, it is ensured that the upper end of the steel long handle is firmly connected to the chassis of the vibration hammer and the strength is guaranteed; and the upper and lower flanges at the bottom of the vibration hammer are designed in combination with the vertical joint steel pipe, which frees up space on the upper part of the lower flange to facilitate the rotation of the longitudinal bolts, so that the vibration hammer and the steel long handle can be easily screwed, and the disassembly and assembly processes are quick and convenient.

[0013] As another preferred embodiment, the steel long handle includes an upper pipe section and a lower pipe section, a transition pipe is welded to the inner wall of the lower pipe, the upper section of the transition pipe is convex than the lower pipe section, the upper convex part of the transition pipe is penetrated by multiple circles of inner holes of different heights, each circle has multiple inner holes, and nuts corresponding to each inner hole are welded to the inner wall of the transition pipe; the upper pipe section is penetrated by a circle of multiple outer holes, the number of the outer holes in the circle is the same as the number of the inner holes in each circle; each outer hole is penetrated by a transverse bolt, which passes through the corresponding inner hole and is screwed into the corresponding nut; a protective bushing is fitted on the outer sleeve of the upper convex part of the transition pipe; the butt joint structure is quick and convenient to assemble, and only the bolts need to be fastened. Just connect the corresponding outer holes, inner holes and nuts; and by screwing the outer holes with inner holes at different heights, the overall length of the steel long handle can be changed to adapt to fertilizer troughs of different depths. For example, the depth of the fertilizer trough is the deepest at the beginning of backfilling, and with the repeated backfilling and compacting of pond slag, the depth of the fertilizer trough naturally becomes shallower. At this time, the steel long handle can be appropriately shortened to make it more convenient to lift and tamp the soil; furthermore, the upper and lower pipe sections are firmly and reliably screwed together, especially the presence of the protective bushing, which shares the shear load received by a circle of transverse bolts, protects the transverse bolts, and further improves the connection firmness and stability of the upper and lower pipe sections.

[0014] As a further preference, there are multiple protective bushings, and the height of each protective bushing is equal to the spacing between the upper and lower adjacent inner holes; the inner diameter and outer diameter of the protective bushing are equal to the inner diameter and outer diameter of the lower pipe section; in this way, an appropriate number of protective bushings are inserted according to the length of the upper and lower pipe sections exposed by the transition pipe to ensure that they fill the spacing between the upper and lower pipe sections and give full play to their function of sharing the shear load of the transverse bolts, further improving the structural stability and extending the service life; moreover, the protective bushing has strong versatility, and only one fixed-size protective bushing needs to be prepared, and based on this, various lengths can be stacked to adapt to steel long handles of different heights, thereby improving its versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model is a structural schematic diagram of a foundation pit fertilizer trough backfill soil vibration compaction device when it is hoisted and inserted into the fertilizer trough.

[0016] Figure 2 The utility model is a structural schematic diagram of a vibration compaction device for backfill soil in a foundation pit fertilizer trough.

[0017] Figure 3 yes Figure 2 Schematic diagram of the structure after deflection at a certain angle.

[0018] Figure 4 The utility model is a structural schematic diagram of a steel long handle of a foundation pit fertilizer trough backfill soil vibration compaction device.

[0019] Figure 5 It is a schematic diagram of the enlarged structure of the half-section view of the joint of the steel long handle.

[0020] As shown in the figure, 1. vibratory hammer, 2. long steel handle, 2.1. upper pipe section, 2.2. lower pipe section, 3. rammer part, 3.1. conical shell, 3.2. rectangular shell, 4. lifting ear, 5. long handle flange, 6. long handle rib, 7. upper flange, 8. joint steel pipe, 9. lower flange, 10. flange rib, 11. longitudinal bolt, 12. transition pipe, 13. inner hole, 14. nut, 15. outer hole, 16. transverse bolt, 17. protective bushing, 18. retaining pile wall, 19. basement top plate, 20. fertilizer trough. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0022] like Figure 1 to Figure 5 As shown, the utility model discloses a vibration compaction device for backfilling soil in a foundation pit fertilizer trough, which comprises a vibration hammer 1, a steel long handle 2 and a compaction hammer part 3.

[0023] A lifting lug 4 is welded on the top of the vibrating hammer 1, and the crane wire rope lifts the vibrating hammer 1 and the entire compacting device through the lifting lug 4. The gap between the retaining pile wall 18 and the basement top plate and the basement outer wall is a fertilizer trough 20. The vibrating hammer 1 and the upper section of the steel long handle 2 are located above the fertilizer trough 20, and the lower end of the steel long handle 2 and the tamping hammer part 3 extend into the fertilizer trough 20.

[0024] The upper end of the steel long handle 2 is fixed to the bottom of the vibration hammer 1. Specifically, a long handle flange 5 is welded to the upper end of the steel long handle 2, and a circle of multiple long handle ribs 6 are welded between the long handle flange 5 and the steel long handle 2; an upper flange 7 is welded to the chassis crossbeam of the vibration hammer 1, and the upper flange 7 is welded to the lower flange 9 through a vertical joint steel pipe 8, and a circle of multiple flange ribs 10 are welded to the outer periphery of the joint steel pipe 8, and the upper and lower ends of the flange ribs 10 are respectively welded to the upper flange 7 and the lower flange 9; the lower flange 9 and the long handle flange 5 are connected via longitudinal bolts 11.

[0025] The rammer part 3 includes a hollow steel shell, and the steel shell is filled with counterweight concrete. Specifically, the steel shell includes an upper cone shell 3.1 and a lower rectangular shell 3.2; the cone shell 3.1 is welded by four trapezoidal steel plates with small upper parts and large lower parts and a top steel plate, and the rectangular shell 3.2 is welded by two long side steel plates, two short side steel plates and a bottom steel plate; the lower edges of the four trapezoidal steel plates of the cone shell 3.1 are respectively welded to the upper edges of the four side steel plates of the rectangular shell 3.2. The upper end of the rammer part 3 is fixed to the lower end of the steel long handle 2, that is, the top steel plate of the rammer part 3 is welded to the bottom end of the steel long handle 2.

[0026] The length of the short side steel plate is 100 mm shorter than the width of the fat trough. If the width of the fat trough is 600 mm, the width of the rectangular shell 3.2 of the rammer part 3 is 500 mm.

[0027] Of course, the steel shell of the rammer part 3 can also be in other shapes, such as the cone shell 3.1 can be a cone instead of a square cone, and the lower part can also be a cylindrical shell instead of a rectangular shell 3.2.

[0028] The steel long handle 2 can be a complete steel pipe with a constant length. It can also be divided into an upper pipe section 2.1 and a lower pipe section 2.2. A transition pipe 12 is welded to the inner wall of the lower pipe. The upper section of the transition pipe 12 is convex to the lower pipe section 2.2. The upper convex part of the transition pipe 12 has multiple circles, such as 4 circles, of inner holes 13 of different heights. Each circle of inner holes 13 has multiple, such as 6. The inner wall of the transition pipe 12 is welded with nuts 14 corresponding to each inner hole 13. In this embodiment, 24 nuts 14 are welded corresponding to 4 circles of inner holes 13. The upper pipe section 2.1 has a circle of multiple outer holes 15. The number of the outer holes 15 in the circle is the same as the number of the inner holes 13 in each circle, that is, 6. Each outer hole 15 is penetrated by a transverse bolt 16, which passes through the corresponding inner hole 13 and is screwed into the corresponding nut 14. A protective bushing 17 is fitted on the outer sleeve of the upper convex part of the transition pipe 12. The protective bushing 17 can be a protective bushing 17 of different sizes. Of course, multiple protective bushings 17 of the same height may be overlapped, so that the height of each protective bushing 17 is equal to the distance between the upper and lower adjacent inner holes 13; the inner diameter and outer diameter of the protective bushing 17 are equal to the inner diameter and outer diameter of the lower pipe section 2.2.

Claims

1. A vibration compaction device for backfill soil in a foundation pit fertilizer trough, characterized in that: It comprises a vibrating hammer with a lifting ear, a steel long handle whose upper end is fixed to the bottom of the vibrating hammer, and a rammer part whose upper end is fixed to the bottom of the steel long handle; the rammer part comprises a hollow steel shell, and counterweight concrete is poured in the steel shell.

2. The foundation pit fertilizer trough backfill soil vibration compaction device according to claim 1 is characterized in that: The steel shell includes an upper conical shell and a lower rectangular shell; the conical shell is welded by four trapezoidal steel plates that are smaller at the top and larger at the bottom and a top steel plate, and the rectangular shell is welded by two long side steel plates, two short side steel plates and a bottom steel plate; the lower edges of the four trapezoidal steel plates of the conical shell are respectively welded to the upper edges of the four side steel plates of the rectangular shell; the top steel plate is welded to the lower end of the steel long handle.

3. The foundation pit fertilizer trough backfill soil vibration compaction device according to claim 2 is characterized in that: The length of the short side steel plate is 100mm shorter than the width of the fertilizer trough.

4. The foundation pit fertilizer trough backfill soil vibration compaction device according to claim 1 is characterized in that: A long handle flange is welded to the upper end of the steel long handle, and a circle of multiple long handle ribs are welded between the long handle flange and the steel long handle; an upper flange is welded to the crossbeam of the vibration hammer chassis, and the upper flange is welded to a lower flange via a vertical joint steel pipe, and a circle of multiple flange ribs are welded to the outer periphery of the joint steel pipe, and the upper and lower ends of the flange ribs are respectively welded to the upper flange and the lower flange; the lower flange and the long handle flange are connected via longitudinal bolts.

5. The foundation pit fertilizer trough backfill soil vibration compaction device according to claim 1 is characterized in that: The steel long handle includes an upper pipe section and a lower pipe section. A transition pipe is welded to the inner wall of the lower pipe. The upper section of the transition pipe is convex than the lower section. The upper convex part of the transition pipe is penetrated by multiple circles of inner holes with different heights. Each circle has multiple inner holes. Nuts corresponding to each inner hole are welded to the inner wall of the transition pipe. The upper pipe section is penetrated by a circle of multiple outer holes. The number of outer holes in the circle is the same as the number of inner holes in each circle. Each outer hole is penetrated by a transverse bolt, which passes through the corresponding inner hole and is screwed into the corresponding nut. A protective bushing is fitted on the outer sleeve of the upper convex part of the transition pipe.

6. The foundation pit fertilizer trough backfill soil vibration compaction device according to claim 5 is characterized in that: There are multiple protective bushings, and the height of each protective bushing is equal to the distance between the upper and lower adjacent inner holes; the inner diameter and outer diameter of the protective bushing are equal to the inner diameter and outer diameter of the lower pipe section.

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