Tamping and reinforcing equipment and reinforcing method for building foundation pit construction

Abstract

The invention relates to the technical field of foundation pit construction, in particular to tamping and reinforcing equipment and method for building foundation pit construction, and the tamping and reinforcing equipment comprises a two-dimensional moving platform and a tamping unit; the tamping unit comprises a first shell and a second shell which are arranged from top to bottom in the vertical direction, a weight block is movably arranged in the first shell in the vertical direction, the moving path of the weight block has a first highest position and a first lowest position, and the weight block freely falls from the first highest position to the first lowest position; and a tamping head is movably arranged on the lower portion of the second shell in the vertical direction, an extension rod is fixedly arranged on the upper portion of the tamping head in the vertical direction, the extension rod extends into the second shell, and the moving path of the extension rod has a second highest position and a second lowest position. According to the two-dimensional mobile platform, the reaction force of the ground is prevented from acting on the two-dimensional mobile platform, the two-dimensional mobile platform is prevented from being damaged after being used for a long time, and the service life of the two-dimensional mobile platform is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of foundation pit construction, and in particular to compaction reinforcement equipment and a reinforcement method for building foundation pit construction. Background Art

[0002] At present, during the hydraulic compaction and reinforcement operation of the building foundation, the hydraulic compaction and reinforcement equipment is first connected to the mobile equipment, and the mobile equipment drives the hydraulic compaction and reinforcement equipment to move to the working position. The hydraulic compaction and reinforcement equipment can be implemented quickly and efficiently to improve the construction efficiency. The hydraulic compaction and reinforcement equipment has the characteristics of easy operation, adjustable vibration frequency and pressure, and can accurately control the construction parameters according to the specific situation to ensure the compaction and reinforcement effect and quality. However, the hydraulic compaction and reinforcement equipment can only be used to compact and reinforce relatively flat land. When encountering a large foundation pit, the mobile equipment drives the hydraulic compaction and reinforcement equipment to compact and reinforce the area close to the pit wall of the foundation pit, and the center of the foundation pit cannot be compacted and reinforced. There is a phenomenon of incomplete compaction and reinforcement of the bottom of the foundation pit, and the compaction head of the hydraulic compaction and reinforcement equipment is usually round, which is not easy to compact and reinforce the corners of the bottom of the foundation pit.

[0003] Chinese patent CN118481112B discloses a reinforcement device for building foundation construction, comprising: a connecting block, the front end of which is mounted with a fixed section of a hydraulic push rod. A moving device connected to the telescopic section of the hydraulic push rod, the moving device comprising a telescopic plate with a fixed section mounted on the telescopic section of the hydraulic push rod, and sliding plates mounted on both left and right ends of the telescopic plate. A supporting device connected to the two sliding plates, the supporting device comprising two distance adjustment mechanisms symmetrically distributed front and back and fixedly connected to the two sliding plates at both ends, the two distance adjustment mechanisms being slidably sleeved with a sliding block, a fixed oblique rod being mounted on the upper surface of the left ends of the two distance adjustment mechanisms, the fixed oblique rod being fixedly connected to the corresponding sliding plate, an angle adjustment mechanism being hinged on the right end of the fixed oblique rod, the angle adjustment mechanism being hinged on the right ends of the two distance adjustment mechanisms, and a telescopic rod being hinged between the upper end of the sliding block and the fixed oblique rod. A compaction and reinforcement device is connected to the lower end of the sliding block, and the compaction and reinforcement device includes a compaction and reinforcement module for compaction and reinforcement operations, and a compaction and reinforcement plate is detachably installed at the lower end of the compaction and reinforcement module, and two L-shaped downward pressure rods are symmetrically installed on the upper end of the compaction and reinforcement plate. Two side block devices are provided and are symmetrically connected to the two sliding plates, and the side block device includes a side block with a sliding groove and slidably connected to the sliding plate, and a side pressure mechanism is connected to the side block, and a downward pressure mechanism is connected to the lower end of the side block.

[0004] Although the above scheme can meet the requirements of compaction operations on the bottom of the foundation pit, when the compaction equipment is tamping the ground, the reaction force of the ground on the compaction equipment will be completely absorbed by the compaction equipment. In this way, setting up the compaction equipment on the top of the foundation pit and performing compaction operations for a long time will cause damage to the compaction equipment, and will also cause the bracket used to support the compaction equipment to bend, and the existing compaction equipment has high energy consumption. Summary of the invention

[0005] In response to the above problems, a compaction reinforcement device and a reinforcement method for building foundation pit construction are provided. By setting a weight block and a compaction head, the compaction head is used to compact the foundation pit ground. At the same time, an upper cavity is set between the weight block and the extension rod of the compaction head for shock absorption, thereby reducing the reaction force generated when the ground is compacted and the effect of vibration transmitted to the two-dimensional mobile platform, thereby extending the service life of the two-dimensional mobile platform.

[0006] To solve the problems of the prior art, the present invention provides a compaction and reinforcement device for construction of a building foundation pit, comprising a two-dimensional mobile platform and a compaction unit arranged at the lower part of the two-dimensional mobile platform; the compaction unit comprises a first shell and a second shell arranged from top to bottom in a vertical direction, a weight block is arranged in the first shell for movement in the vertical direction, a moving path of the weight block has a first highest position and a first lowest position, the weight block freely falls from the first highest position to the first lowest position, a compaction head is arranged in the lower part of the second shell for movement in the vertical direction, an extension rod is fixedly arranged on the upper part of the compaction head in the vertical direction, the extension rod extends into the second shell, the moving path of the extension rod has a second highest position and a second lowest position, when the weight block starts to descend from the first highest position, the extension rod is stationary at the second highest position, when the lower part of the weight block slides into the second shell, the extension rod starts to descend from the second highest position, when the weight block reaches the first lowest position, the extension rod simultaneously reaches the second lowest position, and at this time the compaction head contacts the foundation pit ground.

[0007] Preferably, a lifting groove is provided in the upper part of the second shell along the vertical direction, the extension rod is slidably arranged in the lifting groove along the vertical direction, a sealing disk is fixedly provided on the upper part of the extension rod, the sealing disk slides with the lifting groove in the vertical direction, and a sealing ring is sleeved on the peripheral wall of the sealing disk, and sealing rings are also sleeved on the contact positions between the weight block and the first shell and the second shell, respectively. When the extension rod is at the second highest position, the sealing disk separates the lifting groove into an upper cavity and a lower cavity, and there is an opening in the upper part of the upper cavity. When the weight block descends to the height of the upper end surface of the second shell, the opening of the upper cavity is sealed by the weight block.

[0008] Preferably, a lifting unit for lifting the weight block in a vertical direction is provided on the top of the first shell, and the lifting unit stops running after the weight block rises to the first highest position.

[0009] Preferably, the lifting unit includes a first corrugated sleeve vertically arranged on the upper part of the weight block, the upper part of the first corrugated sleeve is fixedly connected to the upper part of the first shell, an inflation chamber is formed in the first corrugated sleeve, an air pump is arranged on one side of the first corrugated sleeve, the air pump and the inflation chamber are interconnected, and a first switch valve interconnected with the inflation chamber is also arranged on the side of the first corrugated sleeve, and before the weight block descends, the first switch valve is in an open state.

[0010] Preferably, a first trigger button is provided in the first corrugated sleeve, and the first trigger button is fixedly provided on the top of the first shell. When the weight block rises to the first highest position, the weight block can trigger the first trigger button. After the first trigger button is triggered, the air pump stops running.

[0011] Preferably, a cavity is provided in the weight block, and a shock-proof block is arranged and movable in the vertical direction in the cavity.

[0012] Preferably, an extrusion unit is arranged in the second shell, the extrusion unit includes a recovery chamber interconnected with the lower cavity, an extrusion block is arranged in the recovery chamber for movement along the vertical direction, the extrusion block separates the recovery chamber into a connecting chamber and an extrusion chamber from top to bottom along the vertical direction, when the extension rod is in the second highest position, the volume of the extrusion chamber is the smallest, when the extension rod is in the second lowest position, the volume of the extrusion chamber is the largest, a recovery unit is arranged on the upper part of the extrusion chamber, the recovery unit includes a first vane pump interconnected with the extrusion chamber, the output end of the first vane pump is interconnected with the extrusion chamber, a first generator is arranged on the driving end of the first vane pump, and a first one-way valve is connected to the input end of the first vane pump, the first one-way valve allows outside air to enter the extrusion chamber.

[0013] Preferably, the recovery unit also includes a second vane pump arranged on one side of the first vane pump, the input end of the second vane pump is connected to the extrusion chamber, a second generator is arranged on the driving end of the second vane pump, and a second one-way valve is arranged on the output end of the second vane pump, and the air in the extrusion chamber is discharged to the outside through the second one-way valve.

[0014] Preferably, a second trigger button is provided below the extrusion block, and a second switch valve is provided between the second vane pump and the extrusion chamber. When the second switch valve is triggered, the second switch valve is in a closed state, and when the weight block drops from the first highest position to the height of the upper end surface of the second outer shell, the second switch valve opens.

[0015] The present invention also relates to a compaction and reinforcement method for building foundation pit construction, which uses a compaction and reinforcement device for building foundation pit construction, and the specific steps are as follows: S1, the two-dimensional mobile platform drives the compacting unit to move to the designated position and then stops moving, the weight block rises vertically in the first shell to the first highest position, at which time the extension rod in the second shell is in the second highest position, and the compacting head does not contact the ground of the foundation pit; S2, the weight block is then lowered from the first highest position by its own gravity, and the weight block performs free fall in the first shell, while the extension rod is still in the second highest position. When the bottom of the weight block begins to enter the second shell, the extension rod begins to descend, and the descending speed of the extension rod is the same as the descending speed of the weight block; S3. When the weight block drops to the first lowest position, the extension rod drops to the second lowest position, and the tamping head arranged at the lower part of the extension rod hits the ground of the foundation pit. Then the weight block and the extension rod rise synchronously, the tamping head leaves the ground, the extension rod rises to the second highest position and then stops rising, the tamping head rises to the first highest position and then stops rising, and then the weight block is put down again, and the cycle repeats.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. During construction, the compaction unit is moved to the designated position by a two-dimensional mobile platform. After reaching the designated position, the two-dimensional mobile platform stops running. A linear drive is arranged between the compaction unit and the two-dimensional mobile platform. The output end of the linear drive is vertically downward. The upper part of the linear drive is arranged on the two-dimensional mobile platform. The compaction unit is fixedly arranged on the output end of the linear drive. The linear drive moves the compaction unit down to the preset position according to the preset length. The preset length refers to the height to which the compaction unit needs to be lowered according to the depth of the foundation pit by the on-site staff, so as to ensure that the compaction head in the compaction unit can impact the ground of the foundation pit when it descends. After the compaction unit descends to the specified height, the weight block begins to descend. It is assumed here that the weight block is already in the first highest position, that is, the weight block begins to descend from the first highest position. When the weight block descends from the first highest position, the extension rod is in the second highest position. At this time, the compaction head arranged at the bottom of the extension rod does not contact the ground. The falling weight block performs free fall motion under the action of its own gravity. When the bottom of the weight block is about to enter the second shell, the extension rod begins to descend, and the extension rod descends synchronously with the weight block. When the weight block reaches the first lowest position, the extension rod reaches the second lowest position at the same time, and the tamping head contacts the ground, avoiding the reaction force of the ground on the two-dimensional mobile platform, ensuring that the two-dimensional mobile platform will not be damaged after long-term use, and extending the service life of the two-dimensional mobile platform.

[0017] 2. A sealing disk is provided at the upper part of the extension rod, which divides the lifting slot in the second shell into an upper cavity and a lower cavity. When the weight block descends, it first slides into the lifting slot. At this time, the upper cavity is sealed, and the weight block pushes the sealing disk through the air in the upper cavity instead of directly colliding with the sealing disk, thereby avoiding wear on the sealing disk. At the same time, after the tamping head collides with the ground, the upper cavity provided between the sealing disk and the weight block can reduce the vibration, so that the vibration at the sealing disk cannot be directly transmitted to the weight block, thereby reducing the influence of the vibration generated by the tamping head when tamping the ground on the two-dimensional mobile platform and extending the service life of the two-dimensional mobile platform.

[0018] 3. By setting up the extrusion unit and the recovery unit, energy storage and power generation are carried out during the lifting and lowering process of the tamping head, and energy is supplied to the lifting unit, thus reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional schematic diagram of a compaction and reinforcement equipment for building foundation pit construction.

[0020] Figure 2 It is a three-dimensional schematic diagram of a compaction and reinforcement equipment for building foundation pit construction with the two-dimensional moving platform removed.

[0021] Figure 3 It is a compaction and reinforcement equipment for building foundation pit construction. Figure 2 A local enlarged schematic diagram of point A in the middle.

[0022] Figure 4 It is a side view of a compaction reinforcement device for building foundation pit construction.

[0023] Figure 5 It is a compaction and reinforcement equipment for building foundation pit construction. Figure 4 A local enlarged schematic diagram of point B in the middle.

[0024] Figure 6 The present invention is a cutaway three-dimensional schematic diagram of a tamping head of a tamping reinforcement equipment for building foundation pit construction when it is ready to rise after completing tamping.

[0025] Figure 7 It is a compaction and reinforcement equipment for building foundation pit construction. Figure 6 A partial enlarged schematic diagram of point C in the middle.

[0026] Figure 8 It is a compaction and reinforcement equipment for building foundation pit construction. Figure 6 A local enlarged schematic diagram of point D in the middle.

[0027] Fig. 9 The present invention is a cutaway stereoscopic schematic diagram of a heavy block of a compaction and reinforcement device for construction of a building foundation pit when the heavy block is ready to be lowered from the first highest position.

[0028] Fig.10 It is a compaction and reinforcement equipment for building foundation pit construction. Fig. 9 A partial enlarged schematic diagram of point E in the middle.

[0029] The numbers in the figure are: 1. Two-dimensional mobile platform; 2. Tamping unit; 21. Tamping head; 211. Extension rod; 22. Weight block; 221. Cavity; 222. Shockproof block; 23. First shell; 24. Second shell; 241. Lifting slot; 242. Sealing disk; 25. Lifting unit; 251. First bellows sleeve; 252. Air pump; 253. First switch valve; 254. First trigger button; 26. Extrusion unit; 261. Connecting cavity; 262. Extrusion cavity; 263. Extrusion block; 27. Recovery unit; 271. First vane pump; 272. First generator; 273. First one-way valve; 274. Second vane pump; 275. Second generator; 276. Second one-way valve; 277. Second trigger button; 278. Second switch valve; 3. Linear drive. DETAILED DESCRIPTION

[0030] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0031] Reference Figure 1 , Figure 2 , Figure 4 and Figure 5 A compaction and reinforcement device for construction of a foundation pit, comprising a two-dimensional mobile platform 1 and a compaction unit 2 arranged at the bottom of the two-dimensional mobile platform 1; the compaction unit 2 comprises a first shell 23 and a second shell 24 arranged from top to bottom in a vertical direction, a weight block 22 is arranged in the first shell 23 for vertical movement, the moving path of the weight block 22 has a first highest position and a first lowest position, the weight block 22 falls freely from the first highest position to the first lowest position, a compaction head 21 is arranged in the lower part of the second shell 24 for vertical movement, and the compaction head 21 is arranged in the lower part of the second shell 24 for vertical movement. 1 is fixedly provided with an extension rod 211 in the vertical direction on the upper part, and the extension rod 211 extends into the second shell 24. The moving path of the extension rod 211 has a second highest position and a second lowest position. When the weight block 22 starts to descend from the first highest position, the extension rod 211 is stationary at the second highest position. When the lower part of the weight block 22 slides into the second shell 24, the extension rod 211 starts to descend from the second highest position. When the weight block 22 reaches the first lowest position, the extension rod 211 reaches the second lowest position at the same time, and the tamping head 21 is in contact with the foundation pit ground.

[0032] When the existing hydraulic compaction equipment is compacting the ground, the compaction force of the hydraulic compaction equipment on the ground will form a vertical upward reaction force on the hydraulic compaction equipment. The compaction and reinforcement equipment in the prior art has two forms. One is handheld. The handheld compaction and reinforcement equipment requires the staff to hold it for operation. The reaction force generated by the compaction and reinforcement equipment each time will cause the compaction and reinforcement equipment to bounce up. In this way, the staff needs to pay more attention to avoid the compaction and reinforcement equipment from slipping out of the hand due to tilting; the second is to set the compaction and reinforcement equipment on the two-dimensional mobile platform 1, and set the two-dimensional mobile platform 1 on the upper part of the foundation pit. Although no human operation is required, the reaction force generated by the impact of the compaction and reinforcement equipment on the foundation pit will act on the two-dimensional mobile platform 1. After a long time of action, it is easy to cause the two-dimensional mobile platform 1 to bend, and in severe cases, it will cause the two-dimensional mobile platform 1 to be damaged. This not only increases unnecessary maintenance costs, but also affects the progress of foundation pit construction.

[0033] In order to avoid the above situation, the compaction unit 2 is redesigned to reduce the reaction force of the ground on the equipment. The specific structure and working principle are as follows: during construction, the compaction unit 2 is moved to the specified position by the two-dimensional mobile platform 1. After reaching the specified position, the two-dimensional mobile platform 1 stops running. A linear drive 3 is arranged between the compaction unit 2 and the two-dimensional mobile platform 1. The output end of the linear drive 3 is vertically downward. The upper part of the linear drive 3 is arranged on the two-dimensional mobile platform 1. The compaction unit 2 is fixedly arranged on the output end of the linear drive 3. The linear drive 3 moves the compaction unit 2 down to the preset position according to the preset length. The preset length refers to the height to which the compaction unit 2 needs to be lowered according to the depth of the foundation pit, so as to ensure that the compaction head 21 in the compaction unit 2 can impact the ground of the foundation pit when it descends. After the compaction unit 2 is lowered to the specified height, the weight block 22 begins to descend. It is assumed that the weight block 22 is already in the first highest position, that is, the weight block 22 begins to descend from the first highest position. When the weight block 22 descends from the first highest position, the extension rod 211 is in the second highest position, and the compaction head 21 disposed at the bottom of the extension rod 211 is not in contact with the ground. The falling weight block 22 performs free fall motion under the action of its own gravity. When the bottom of the weight block 22 is about to enter the second housing 24, the extension rod 211 begins to descend, and the extension rod 211 descends synchronously with the weight block 22.

[0034] Under ideal conditions, when the weight block 22 reaches the first lowest position, the extension rod 211 also reaches the second lowest position at the same time. However, in actual construction, the bottom of the foundation pit is uneven. In order to ensure the compaction effect of the compaction head 21, the compaction head 21 has already contacted the ground of the foundation pit before the extension rod 211 reaches the second lowest position, so that the impact on the foundation pit ground can be completed. In this way, the impact force of the ground will only act on the compaction head 21, and the reaction force of the ground will not produce a vertical upward thrust on the first shell 23 and the second shell 24, thereby avoiding the reaction force of the ground from acting on the two-dimensional mobile platform 1, ensuring that the two-dimensional mobile platform 1 will not be damaged after long-term use, thereby extending the service life of the two-dimensional mobile platform 1.

[0035] Reference Fig. 9 A lifting groove 241 is provided in the upper part of the second shell 24 along the vertical direction, and the extension rod 211 is slidably arranged in the lifting groove 241 along the vertical direction. A sealing disk 242 is fixedly provided on the upper part of the extension rod 211, and the sealing disk 242 slides with the lifting groove 241 in the vertical direction, and a sealing ring is sleeved on the peripheral wall of the sealing disk 242. The contact positions of the weight block 22 with the first shell 23 and the second shell 24 are also sleeved with sealing rings respectively. When the extension rod 211 is located at the second highest position, the sealing disk 242 separates the lifting groove 241 into an upper cavity and a lower cavity. There is an opening in the upper part of the upper cavity. When the weight block 22 drops to the height of the upper end surface of the second shell 24, the opening of the upper cavity is sealed by the weight block 22.

[0036] When the weight block 22 drops to the height of the upper end surface of the second shell 24, the opening of the upper cavity is blocked, and the weight block 22 will continue to drop. The weight block 22 and the sealing disk 242 are separated by the upper cavity, and the upper cavity is filled with air. When the tamping head 21 contacts the ground of the foundation pit, the vibration generated by the collision of the tamping head 21 with the ground of the foundation pit will be transmitted upward through the extension rod 211. Since a sealing ring is provided on the peripheral wall of the sealing disk 242, the sealing ring can reduce the vibration and reduce the vibration transmitted from the second shell 24 and the first shell 23 to the two-dimensional mobile platform 1, thereby causing damage to the two-dimensional mobile platform 1. However, the sealing ring The cushioning effect of the sealing ring is very small. In order to further improve the shock absorption effect, the upper cavity between the sealing disk 242 and the weight block 22 can slow down the lifting rod in a vibrating state, that is, when the weight block 22 descends and slides into the lifting groove 241, the upper cavity is completely sealed, and the sealed upper cavity and the sealing ring are used for double shock absorption, which reduces the impact of vibration on the two-dimensional mobile platform 1. In the process of the weight block 22 descending, the bottom of the weight block 22 will not directly contact the sealing disk 242, avoiding the collision between the weight block 22 and the sealing disk 242, and improving the service life of the weight block 22 and the sealing disk 242. If the weight block 22 and the sealing disk 242 are combined together, the weight block 22 and the tamping head 21 are synchronously descended. Although this can increase the strength during the tamping operation, the vibration is large, and long-term use will cause damage to the two-dimensional mobile platform 1.

[0037] Reference Figure 5 A lifting unit 25 for lifting the weight block 22 in a vertical direction is provided on the top of the first shell 23. After the weight block 22 rises to a first highest position, the lifting unit 25 stops running.

[0038] Reference Figure 5 , Figure 6 , Figure 8 and Fig. 9 The lifting unit 25 includes a first corrugated sleeve 251 vertically arranged on the upper part of the weight block 22, the upper part of the first corrugated sleeve 251 is fixedly connected to the upper part of the first shell 23, an air filling chamber is formed in the first corrugated sleeve 251, an air pump 252 is arranged on one side of the first corrugated sleeve 251, the air pump 252 is interconnected with the air filling chamber, and a first switch valve 253 interconnected with the air filling chamber is also arranged on the side of the first corrugated sleeve 251. Before the weight block 22 descends, the first switch valve 253 is in an open state.

[0039] Reference Figure 5 and Fig. 9 : A first trigger button 254 is arranged in the first corrugated sleeve 251. The first trigger button 254 is fixedly arranged on the top of the first shell 23. When the weight block 22 rises to the first highest position, the weight block 22 can trigger the first trigger button 254. After the first trigger button 254 is triggered, the air pump 252 stops running.

[0040] When the tamping head 21 completes the tamping work, the air pump 252 is started, and the air pump 252 extracts the gas in the first bellows, that is, extracts the air in the inflation chamber. At this time, the first switch valve 253 is in a closed state. When the weight block 22 rises to the first highest position, the weight block 22 triggers the first trigger button 254, and then the air pump 252 stops running. In this way, the weight block 22 remains motionless at the first highest position, and then the two-dimensional mobile platform 1 drives the tamping unit 2 to move to the next tamping position. After the two-dimensional mobile platform 1 stops moving, the first switch valve 253 is opened, the inflation chamber is connected to the outside world, and the weight block 22 performs free fall motion under the action of its own gravity.

[0041] Reference Figure 6 A cavity 221 is provided in the weight block 22, and a shockproof block 222 is arranged and movable in the cavity 221 along the vertical direction.

[0042] Although the tamping head 21 does not transmit the reaction force to the two-dimensional mobile platform 1 during the tamping process of the ground, the tamping head 21 and the weight block 22 will still be affected by the reaction force, that is, the tamping head 21 bounces up after contacting the ground, and bounces up repeatedly. In this way, after the tamping head 21 completes the tamping, the lifting unit 25 cannot immediately lift the weight block 22. This is because when the tamping head 21 reciprocates in the vertical direction, the weight block 22 also reciprocates in the vertical direction synchronously, and a cavity 221 is opened in the weight block 22, and a cavity 221 is set in the cavity 221. The shockproof block 222 forms a damping effect inside the weight block 22. The principle is the same as that of the shockproof hammer, that is, the vibration of the weight block 22 will be transmitted to the shockproof block 222, so that the shockproof block 222 moves back and forth in the cavity 221. At the same time, the upper cavity between the weight block 22 and the sealing disk 242 also has the effect of slowing down the vibration frequency, so that the tamping head 21 will not rebound multiple times after completing the tamping, which ensures that the lifting unit 25 can lift the weight block 22 immediately after the tamping head 21 completes the tamping, and carry out the next tamping operation, thereby improving work efficiency.

[0043] Reference Figure 3 , Figure 4 , Figure 6 , Fig. 9 and Fig.10: An extrusion unit 26 is arranged in the second shell 24, and the extrusion unit 26 includes a recovery chamber interconnected with the lower cavity. An extrusion block 263 is arranged in the recovery chamber for movement along the vertical direction. The extrusion block 263 divides the recovery chamber into a connecting chamber 261 and an extrusion chamber 262 from top to bottom along the vertical direction. When the extension rod 211 is in the second highest position, the volume of the extrusion chamber 262 is the smallest. When the extension rod 211 is in the second lowest position, the volume of the extrusion chamber 262 is the largest. A recovery unit 27 is arranged on the upper part of the extrusion chamber 262. The recovery unit 27 includes a first vane pump 271 interconnected with the extrusion chamber 262. The output end of the first vane pump 271 is interconnected with the extrusion chamber 262. A first generator 272 is arranged on the driving end of the first vane pump 271. A first one-way valve 273 is connected to the input end of the first vane pump 271. The first one-way valve 273 allows outside air to enter the extrusion chamber 262.

[0044] Reference Figure 2 , Figure 7 and Figure 8 The recovery unit 27 also includes a second vane pump 274 arranged on one side of the first vane pump 271. The input end of the second vane pump 274 is connected to the extrusion chamber 262. A second generator 275 is arranged on the driving end of the second vane pump 274. A second one-way valve 276 is arranged on the output end of the second vane pump 274. The air in the extrusion chamber 262 is discharged to the outside through the second one-way valve 276.

[0045] Reference Figure 7 , Fig. 9 and Fig.10 : A second trigger button 277 is arranged below the extrusion block 263, and a second switch valve 278 is arranged between the second vane pump 274 and the extrusion chamber 262. When the second switch valve 278 is triggered, the second switch valve 278 is in a closed state. When the weight block 22 drops from the first highest position to the height of the upper end surface of the second shell 24, the second switch valve 278 opens.

[0046] When the extension rod 211 is in the second highest position, the volume of the extrusion chamber 262 is the largest, the extrusion block 263 is in the lowest position, and the second trigger button 277 is in the trigger state, and the second switch valve 278 is closed, so that the extension rod 211 can be maintained at the second highest position. When the weight block 22 begins to descend from the first highest position, the weight of the weight block 22 is constant, and the vertical height from the first highest position to the upper end surface of the second shell 24 is constant. In this way, the time taken for the weight block 22 to descend from the first highest position to the height of the upper end surface of the second shell 24 is constant. In this way, the opening time of the second switch valve 278 can be preset, that is, the time taken for the weight block 22 to descend from the first highest position to the height of the upper end surface of the second shell 24 becomes the rated time. After the first switch valve 253 is opened, the second switch valve 278 is opened after the rated time. In this way, after the weight block 22 enters the lifting groove 241, the sealing disk 242 and the extension rod 211 are no longer locked, ensuring that the tamping head 21 can compact the ground smoothly. When the extension rod 211 rises, the extrusion block 263 descends, and when the extension rod 211 descends, the extrusion block 263 rises. When the air in the extrusion chamber 262 is squeezed out, the second vane pump 274 is started, and the second generator 275 generates electricity. When air is injected into the extrusion chamber 262, the first vane pump 271 is started, and the first generator 272 generates electricity. A battery is provided on one side of the first shell 23. The electric energy generated by the first generator 272 and the second generator 275 is stored in the battery. The battery functions to the lifting unit 25, thereby reducing energy consumption.

[0047] Reference Figure 1-Figure 10 The present invention also relates to a compaction and reinforcement method for building foundation pit construction, which uses a compaction and reinforcement device for building foundation pit construction, and the specific steps are as follows: S1, the two-dimensional mobile platform 1 drives the tamping unit 2 to move to the specified position and then stops moving, the weight block 22 rises vertically in the first shell 23 to the first highest position, at which time the extension rod 211 in the second shell 24 is in the second highest position, and the tamping head 21 is not in contact with the ground of the foundation pit; S2, the weight block 22 is then lowered from the first highest position by its own gravity, and the weight block 22 performs free fall in the first housing 23, at which time the extension rod 211 is still in the second highest position, and when the bottom of the weight block 22 begins to enter the second housing 24, the extension rod 211 begins to descend, and the descending speed of the extension rod 211 is the same as the descending speed of the weight block 22; S3. When the weight block 22 drops to the first lowest position, the extension rod 211 drops to the second lowest position, and at this time the tamping head 21 arranged at the lower part of the extension rod 211 hits the ground of the foundation pit, and then the weight block 22 and the extension rod 211 rise synchronously, the tamping head 21 leaves the ground, the extension rod 211 rises to the second highest position and then stops rising, the tamping head 21 rises to the first highest position and then stops rising, and then the weight block 22 is put down again, and the cycle repeats.

[0048] Working principle: During construction, the compacting unit 2 is moved to the designated position by the two-dimensional mobile platform 1. After reaching the designated position, the two-dimensional mobile platform 1 stops running. A linear drive 3 is arranged between the compacting unit 2 and the two-dimensional mobile platform 1. The output end of the linear drive 3 is vertically downward. The upper part of the linear drive 3 is arranged on the two-dimensional mobile platform 1. The compacting unit 2 is fixedly arranged on the output end of the linear drive 3. The linear drive 3 moves the compacting unit 2 to the preset position according to the preset length. The preset length refers to the height that the on-site staff judges the compacting unit 2 to be lowered according to the depth of the foundation pit, thereby ensuring that the compacting head 21 in the compacting unit 2 can form an impact on the ground of the foundation pit when it is descended. After the compacting unit 2 is descended to the designated height, the weight block 22 begins to descend. It is assumed that the weight block 22 is already in the first highest position, that is, the weight block 22 starts to descend from the first highest position. When the weight block 22 descends from the first highest position, the extension rod 211 is in the second highest position. At this time, the compacting head 21 arranged at the bottom of the extension rod 211 does not contact the ground. The falling weight block 22 performs free fall motion under the action of its own gravity. When the bottom of the weight block 22 is about to enter the second shell 24, the extension rod 211 starts to descend, and the extension rod 211 descends synchronously with the weight block 22. When the weight block 22 reaches the first lowest position, the extension rod 211 also reaches the second lowest position, and the tamping head 21 contacts the ground.

[0049] A sealing plate 242 is provided on the upper part of the extension rod 211. The sealing plate 242 divides the lifting slot 241 in the second shell 24 into an upper cavity and a lower cavity. The upper cavity and the lower cavity are arranged from top to bottom in the vertical direction. When the weight block 22 descends, it first slides into the lifting slot 241. At this time, the upper cavity is sealed, and the weight block 22 pushes the sealing plate 242 through the air in the upper cavity instead of directly colliding with the sealing plate 242, thereby avoiding wear on the sealing plate 242. At the same time, after the tamping head 21 collides with the ground, the ground will not only generate a reaction force on the tamping head 21, but also transmit vibration to the tamping head 21. The upper cavity arranged between the sealing plate 242 and the weight block 22 can slow down the vibration, so that the vibration at the sealing plate 242 cannot be directly transmitted to the weight block 22, thereby reducing the influence of the vibration generated by the tamping head 21 when tamping the ground on the two-dimensional mobile platform 1, thereby extending the service life of the two-dimensional mobile platform 1.

[0050] The above embodiments only express one or several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the protection scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A compaction and reinforcement device for construction of a building foundation pit, comprising a two-dimensional mobile platform (1) and a compaction unit (2); It is characterized in that The tamping unit (2) comprises a first shell (23) and a second shell (24) arranged from top to bottom in a vertical direction. A weight block (22) is arranged in the first shell (23) to move in the vertical direction. The moving path of the weight block (22) has a first highest position and a first lowest position. The weight block (22) freely falls from the first highest position to the first lowest position. A tamping head (21) is arranged in the lower part of the second shell (24) to move in the vertical direction. An extension rod (211) is fixedly arranged in the upper part of the tamping head (21) in the vertical direction. The extension rod (211) is arranged in the lower part of the second shell (24). The rod (211) extends into the second housing (24), and the movement path of the extension rod (211) has a second highest position and a second lowest position. When the weight block (22) starts to descend from the first highest position, the extension rod (211) remains stationary at the second highest position. When the lower part of the weight block (22) slides into the second housing (24), the extension rod (211) starts to descend from the second highest position. When the weight block (22) reaches the first lowest position, the extension rod (211) simultaneously reaches the second lowest position, and at this time, the tamping head (21) contacts the foundation pit ground.

2. The compaction and reinforcement equipment for construction of a building foundation pit according to claim 1, characterized in that: A lifting groove (241) is provided in the upper part of the second shell (24) in a vertical direction, and the extension rod (211) is slidably arranged in the lifting groove (241) in the vertical direction. A sealing disk (242) is fixedly arranged on the upper part of the extension rod (211). The sealing disk (242) is slidably matched with the lifting groove (241) in the vertical direction, and a sealing ring is sleeved on the peripheral wall of the sealing disk (242). The contact positions of the weight block (22) with the first shell (23) and the second shell (24) are also sleeved with sealing rings. When the extension rod (211) is located at the second highest position, the sealing disk (242) divides the lifting groove (241) into an upper cavity and a lower cavity. The upper part of the upper cavity has an opening. When the weight block (22) descends to the height of the upper end surface of the second shell (24), the opening of the upper cavity is sealed by the weight block (22).

3. The compaction and reinforcement equipment for construction of a building foundation pit according to claim 1, characterized in that: A lifting unit (25) for lifting the weight block (22) in a vertical direction is arranged on the top of the first housing (23); after the weight block (22) rises to a first highest position, the lifting unit (25) stops operating.

4. The compaction and reinforcement equipment for construction of a building foundation pit according to claim 3, characterized in that: The lifting unit (25) comprises a first bellows sleeve (251) vertically arranged on the upper part of the weight block (22); the upper part of the first bellows sleeve (251) is fixedly connected to the upper part of the first shell (23); an air-filled cavity is formed in the first bellows sleeve (251); an air pump (252) is arranged on one side of the first bellows sleeve (251); the air pump (252) and the air-filled cavity are interconnected; a first switch valve (253) interconnected with the air-filled cavity is also arranged on the side of the first bellows sleeve (251); before the weight block (22) descends, the first switch valve (253) is in an open state.

5. The compaction and reinforcement equipment for construction of a building foundation pit according to claim 4, characterized in that: A first trigger button (254) is arranged in the first corrugated sleeve (251). The first trigger button (254) is fixedly arranged on the top of the first housing (23). When the weight block (22) rises to the first highest position, the weight block (22) can trigger the first trigger button (254). After the first trigger button (254) is triggered, the air pump (252) stops running.

6. The compaction and reinforcement equipment for construction of a building foundation pit according to claim 1, characterized in that: A cavity (221) is provided in the weight block (22), and a shockproof block (222) is movably arranged in the cavity (221) along the vertical direction.

7. The compaction and reinforcement equipment for construction of a building foundation pit according to claim 2, characterized in that: An extrusion unit (26) is arranged in the second housing (24), the extrusion unit (26) comprising a recovery chamber interconnected with the lower chamber, an extrusion block (263) is arranged in the recovery chamber to move in the vertical direction, the extrusion block (263) divides the recovery chamber into a communication chamber (261) and an extrusion chamber (262) from top to bottom in the vertical direction, when the extension rod (211) is in the second highest position, the volume of the extrusion chamber (262) is the smallest, and when the extension rod (211) is in the second lowest position, the volume of the extrusion chamber (262) is the largest A recovery unit (27) is provided at the upper part of the extrusion chamber (262), the recovery unit (27) comprising a first vane pump (271) interconnected with the extrusion chamber (262), the output end of the first vane pump (271) is interconnected with the extrusion chamber (262), a first generator (272) is provided on the driving end of the first vane pump (271), and a first one-way valve (273) is connected to the input end of the first vane pump (271), and the first one-way valve (273) allows external air to enter the extrusion chamber (262).

8. The compaction and reinforcement equipment for construction of a building foundation pit according to claim 7, characterized in that: The recovery unit (27) further comprises a second vane pump (274) arranged on one side of the first vane pump (271); an input end of the second vane pump (274) is in communication with the extrusion chamber (262); a second generator (275) is arranged on a driving end of the second vane pump (274); a second one-way valve (276) is arranged on an output end of the second vane pump (274); and air in the extrusion chamber (262) is discharged to the outside through the second one-way valve (276).

9. The compaction and reinforcement equipment for construction of a building foundation pit according to claim 8, characterized in that: A second trigger button (277) is provided below the extrusion block (263), and a second switch valve (278) is provided between the second vane pump (274) and the extrusion chamber (262). When the second switch valve (278) is triggered, the second switch valve (278) is in a closed state, and when the weight block (22) descends from the first highest position to the height of the upper end surface of the second housing (24), the second switch valve (278) is opened.

10. A method for compacting and reinforcing a building foundation pit, using a compacting and reinforcing device for building foundation pit construction as claimed in any one of claims 1 to 9, characterized in that: The specific steps are as follows: S1, the two-dimensional mobile platform (1) drives the compacting unit (2) to move to a designated position and then stops moving, the weight block (22) rises in the first housing (23) along the vertical direction to a first highest position, at which time the extension rod (211) located in the second housing (24) is in a second highest position, and the compacting head (21) is not in contact with the ground of the foundation pit; S2, the weight block (22) is then lowered from the first highest position by its own gravity, and the weight block (22) performs free fall in the first housing (23), at which time the extension rod (211) is still in the second highest position, and when the bottom of the weight block (22) begins to enter the second housing (24), the extension rod (211) begins to descend, and the descending speed of the extension rod (211) is the same as the descending speed of the weight block (22); S3. When the weight block (22) is lowered to the first lowest position, the extension rod (211) is lowered to the second lowest position, and at this time, the tamping head (21) arranged at the lower part of the extension rod (211) hits the ground of the foundation pit, and then the weight block (22) and the extension rod (211) rise synchronously, the tamping head (21) leaves the ground, the extension rod (211) rises to the second highest position and then stops rising, the tamping head (21) rises to the first highest position and then stops rising, and then the weight block (22) is lowered again, and the cycle repeats.

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