Convenient lattice type pile pulling device

Abstract

A convenient lattice type pile pulling device comprises a steel square ground breaking module, a lattice column, a lattice column connecting unit and a lattice column extending frame which are sequentially connected from bottom to top, the lattice column extending frame is connected with a vibration head of a crawler crane, and the lower portion of the steel square ground breaking module is a square ground breaking head of a rectangular hollow structure. An inclined plate is arranged on the front face of the upper portion of the steel square ground breaking module to form a variable cross-section, the minimum position of the variable cross-section is connected with the latticed column, and the minimum cross-section of the variable cross-section is the same as the cross-section of the latticed column. Inclined sliding grooves are formed in the left side face and the right side face of the square ground breaking head, the two inclined sliding grooves are sleeved with the steel bottom-carrying pile pulling sliding bolt in an up-down sliding mode, the highest positions of the inclined sliding grooves are close to the front face of the square ground breaking head, namely the maximum section position of the inclined plate, and the lowest positions of the inclined sliding grooves are located in the middle of the square ground breaking head. The structure is easy and convenient to construct, high in construction speed, low in cost and small in influence on the environment.

Description

Technical Field

[0001] This utility model belongs to the field of foundation treatment technology in building construction, specifically relating to a convenient grid-type pile extraction device. Background Technology

[0002] Currently, with the increasing demand for demolition and reconstruction of old buildings due to functional aging and urban planning updates, the need for demolition of old buildings is growing. In order to adapt to the structural layout of new projects, it is necessary to efficiently remove the original underground pile foundations.

[0003] Traditional construction methods for removing piles include hydraulic jacking, impact pile extraction, and rotary drilling rig pile extraction. Hydraulic jacking, for example, uses hydraulic jacks and reaction frames for static pile extraction. This method requires good soil bearing capacity, has high site requirements, and is relatively slow. Impact pile extraction uses a high-frequency vibratory hammer to transmit vibrational energy to the pile, breaking the friction between the pile and the soil, causing the pile to loosen and be pulled out. This method is generally only suitable for sandy soil or loose strata, and the large vibrations during extraction may affect surrounding buildings or pipelines. Rotary drilling rig cutting uses a rotary drilling rig to clamp the pile, rotating and cutting the surrounding soil simultaneously for extraction. This method is highly accurate and causes minimal disturbance, but its disadvantages include complex construction equipment and high equipment costs. All of these methods for removing abandoned piles have certain limitations, requiring specific construction environments, machinery, and technical expertise, thus increasing extraction time or construction costs. Summary of the Invention

[0004] In order to overcome the shortcomings of existing pile extraction methods, such as poor versatility, high requirements for construction environment, machinery and equipment and technology, long construction period and high cost, this utility model provides a convenient grid-type pile extraction device, which has a simple construction method, fast construction speed, low cost and little environmental impact.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A convenient lattice-type pile extraction device includes a steel square breaking module, a lattice column, a lattice column connecting unit, and a lattice column extension frame connected sequentially from bottom to top. The lattice column extension frame is connected to the vibrating head of a crawler crane. The lower part of the steel square breaking module is a rectangular hollow square breaking head. The upper front of the steel square breaking module is provided with an inclined plate to form a variable cross-section. The minimum point of the variable cross-section is connected to the lattice column, and the minimum cross-section of the variable cross-section is the same as the cross-section of the lattice column. The left and right sides of the square breaking head have inclined grooves. Steel bottom-supporting pile extraction bolts are slidably fitted onto the two inclined grooves. The highest point of the inclined groove is close to the front of the square breaking head, that is, at the maximum cross-section of the inclined plate, and the lowest point of the inclined groove is located in the middle of the square breaking head.

[0007] In this invention, the inclined plate makes the cross-sectional dimensions of the square soil breaking head and the lattice column different. The variable cross-section provides space for the steel bottom-supporting pile pulling bolt to avoid the abandoned pile body during the sinking process. At the same time, the inclined plate provides a sliding slope for the soil in the steel square soil breaking module when the device sinks, so as to reduce the sinking resistance.

[0008] Furthermore, the inclined chute has an arc-shaped bolt groove, which is compatible with the steel bottom-supporting pull-out bolt.

[0009] Furthermore, the steel bottom-supporting pile pulling bolt includes a bolt body, a circular limiting head, a pull ring seat, and a steel circular pull ring. The bolt body has circular limiting heads at both ends, and a trapezoidal pull ring seat with holes is located outside the circular limiting head. A steel circular pull ring is provided on the pull ring seat.

[0010] Preferably, the steel square ground-breaking module is made of rectangular hollow steel sections and steel plates fixedly connected together.

[0011] The lattice column is a hollow column, which is made of four lattice column angle steels and multiple lattice column gusset plates. The lower part of the lattice column is fixedly connected to the upper part of the steel square ground-breaking module, and the upper part of the lattice column is fixedly connected to the lattice column connecting unit.

[0012] The lattice column connection unit includes a connection socket, a sleeve, and a connection plug. The upper part of the lattice column is fixedly connected to the connection socket, the connection socket is fixedly connected to the sleeve, the sleeve is fixedly connected to the connection plug, and the connection plug is fixedly connected to the lattice column extension frame.

[0013] The connecting socket is wrapped around the upper angle steel of the lattice column and is made of multiple steel plates welded together. The connecting socket is fixedly connected to the angle steel of the lattice column.

[0014] The connecting sleeve is a rectangular hollow steel section. The connecting sleeve is wrapped around the outside of the connecting plug and is fixedly connected to the connecting plug. The connecting sleeve has a circular bolt hole and is fixedly connected to the connecting plug by bolts.

[0015] The connector is welded from multiple steel plates. The lower part of the connector is inserted into the connecting sleeve. A circular bolt hole is provided on the lower part of the connector. The lower part of the connector is connected to the connecting sleeve by bolts. The upper part of the connector is fixedly connected to the lower part of the lattice column extension frame.

[0016] The lower part of the lattice column extension frame is a lattice column, and the upper part of the lattice column extension frame consists of a connecting socket and a connecting sleeve. The connecting sleeve is connected to the vibrating head of the crawler crane.

[0017] The technical concept of this utility model is as follows: When in use, a crawler crane vibrating head clamps the top of this utility model. When vibration pressure is applied to this utility model, the lattice column and the bottom steel square earth-breaking module sink together. During the sinking process, the steel square earth-breaking module can cut and separate the waste pile from the surrounding soil. After the entire steel square earth-breaking module and the steel bottom-supporting pile-pulling bolt sink to the bottom of the waste pile, the lattice column is pulled upward. At this time, the soil inside the steel square earth-breaking module is broken and separated to form a cavity. The steel bottom-supporting pile-pulling bolt goes along the sliding groove to the lower bolt slot to catch the bottom of the waste pile, thereby removing the waste pile in one go.

[0018] The beneficial effects of this utility model are mainly reflected in:

[0019] 1. This utility model uses a steel square soil-breaking module to sink into the soil layer, which can cut and separate the soil around the waste pile from the waste pile. The grid column surrounds the waste pile inside, which greatly reduces the frictional resistance of the pile body during the pile extraction process and further improves the extraction speed of the waste pile.

[0020] 2. The principle of this utility model for pile extraction differs from other pile extraction tools that use clamping to remove the abandoned pile. Instead, a steel bottom-mounted extraction bolt secures the entire abandoned pile at its base, allowing for complete removal in one operation. Since the main load-bearing component during pile extraction is this utility model, the abandoned pile does not bear any pull-out force, preventing breakage and the need for secondary extraction. This significantly improves the efficiency and success rate of pile extraction.

[0021] 3. This utility model is equipped with a lattice column connection unit, which can connect multiple lattice column extension frames to change the structural dimensions of this utility model. Therefore, this utility model can adapt to abandoned piles of different pile lengths. Moreover, the steel bottom-supported pile extraction bolt of this utility model can move freely in the sliding groove, which can adapt to abandoned piles of different diameters. Therefore, this utility model has good applicability and convenience.

[0022] 4. This utility model has a simple structure, and the main materials are structural steel, angle steel, and steel plate. The connection between the components is mainly by welding and bolting. It can be customized according to waste piles of different diameters and types, and the processing is convenient. Attached Figure Description

[0023] Figure 1 This is a construction schematic diagram of a convenient lattice-type pile extraction device.

[0024] Figure 2 This is a three-dimensional view of a convenient lattice-type pile extraction device.

[0025] Figure 3 This is a three-dimensional diagram of a steel square earth-breaking module in a convenient lattice-type pile extraction device.

[0026] Figure 4 This is a three-dimensional diagram of the steel square excavation module in another convenient lattice-type pile extraction device, namely... Figure 3 The back view.

[0027] Figure 5 This is a cross-sectional view of a steel square excavation module in a convenient lattice-type pile extraction device.

[0028] Figure 6 This is a three-dimensional diagram of a steel bottom-supporting pile extraction bolt in a convenient lattice-type pile extraction device.

[0029] Figure 7 This is a plan view of the lattice column in a convenient lattice-type pile extraction device.

[0030] Figure 8 This is a three-dimensional diagram of the lattice column connection unit in a convenient lattice-type pile extraction device.

[0031] Figure 9 This is an exploded 3D diagram of the lattice column connection unit in a convenient lattice-type pile extraction device.

[0032] Figure 10 This is a cross-sectional view of the lattice column connection unit in a convenient lattice-type pile extraction device.

[0033] Figure 11 This is a three-dimensional diagram of the lattice column extension frame in a convenient lattice-type pile extraction device.

[0034] Figure 12 This is a flowchart of a construction method for a convenient lattice-type pile extraction device.

[0035] The diagram is labeled as follows: 1-Steel square breaking module; 11-Square breaking head; 12-Inclined plate; 13-Inclined chute; 131-Sliding bolt slot; 2-Steel bottom-supporting pile extraction sliding bolt; 21-Sliding bolt; 22-Limiting head; 23-Pull ring seat; 24-Pull ring; 3-Lattice column; 31-Lattice column angle steel; 32-Lattice column gusset plate; 4-Lattice column connecting unit; 41-Connecting sleeve; 42-Connecting socket; 43-Connecting plug; 431-Bolt hole; 44-Bolt; 5-Lattice column extension frame; 6-Vibration head; 7-Crawler crane. Detailed Implementation

[0036] The present invention will now be further described with reference to the accompanying drawings.

[0037] Reference Figures 1 to 11A convenient lattice-type pile extraction device includes a steel square breaking module 1, a lattice column 3, a lattice column connecting unit 4, and a lattice column extension frame 5 connected sequentially from bottom to top. The lattice column extension frame 5 is connected to the vibrating head 6 of a crawler crane 7. The lower part of the steel square breaking module 1 is a rectangular hollow square breaking head 11. The upper front of the steel square breaking module 1 is provided with an inclined plate 12 to form a variable cross section. The minimum point of the variable cross section is connected to the lattice column 3, and the minimum cross section of the variable cross section is the same as the cross section of the lattice column 3. The left and right sides of the square breaking head 1 have inclined grooves 13. Steel bottom-supporting pile extraction bolts 2 are slidably fitted onto the two inclined grooves 13. The highest point of the inclined groove 13 is close to the front of the square breaking head 1, that is, at the maximum cross section of the inclined plate 12, and the lowest point of the inclined groove 13 is located in the middle of the square breaking head 1.

[0038] In this utility model, the inclined plate 12 makes the cross-sectional dimensions of the square soil breaking head 11 and the lattice column 3 different. The variable cross-section provides space for the steel bottom-supporting pile pulling bolt 2 to avoid the waste pile body during the sinking process. At the same time, the inclined plate 12 provides a sliding slope for the soil in the steel square soil breaking module 1 when the device sinks, so as to reduce the resistance of sinking.

[0039] Furthermore, the inclined chute 13 has an arc-shaped bolt groove 131, which is adapted to the steel bottom-supporting pull-out bolt 2. The arc-shaped bolt groove 131 can be set at the bottom or middle of the inclined chute.

[0040] Furthermore, the steel bottom-supporting pile pulling bolt 2 includes a bolt body 21, a circular limiting head 22, a pull ring seat 23, and a steel circular pull ring 24. The bolt body 21 has circular limiting heads 22 at both ends, and a trapezoidal pull ring seat 23 with holes is provided outside the circular limiting head 22. A steel circular pull ring 24 is provided on the pull ring seat 23.

[0041] Preferably, the steel square ground-breaking module 1 is formed by fixing rectangular hollow steel sections and steel plates together.

[0042] The lattice column 3 is a hollow column, which is made of four lattice column angle steels 31 and multiple lattice column gusset plates 32. The lower part of the lattice column 3 is fixedly connected to the upper part of the steel square ground-breaking module 1, and the upper part of the lattice column 3 is fixedly connected to the lattice column connecting unit 4.

[0043] The lattice column connection unit 4 includes a connection socket 42, a sleeve 41, and a connection plug 43. The upper part of the lattice column 3 is fixedly connected to the connection socket 42, the connection socket 42 is fixedly connected to the sleeve 41, the sleeve 41 is fixedly connected to the connection plug 43, and the connection plug 43 is fixedly connected to the lattice column extension frame 5.

[0044] The connecting socket 42 is wrapped around the outer side of the upper angle steel of the lattice column and is made of multiple steel plates welded together. The connecting socket is fixedly connected to the angle steel of the lattice column.

[0045] The connecting sleeve 41 is a rectangular hollow steel section. The connecting sleeve is wrapped around the outside of the connecting plug and is fixedly connected to the connecting plug. The connecting sleeve has a circular bolt hole and is fixedly connected to the connecting plug by bolts.

[0046] The connector 43 is welded from multiple steel plates. The lower part of the connector is inserted into the connecting sleeve. A circular bolt hole 431 is opened on the lower part of the connector. The lower part of the connector 43 is connected to the connecting sleeve 41 by bolts 44. The upper part of the connector 43 is fixedly connected to the lower part of the lattice column extension frame 5.

[0047] The lower part of the lattice column extension frame 5 is a lattice column, and the upper part of the lattice column extension frame consists of a connecting socket and a connecting sleeve. The connecting sleeve is connected to the vibrating head of the crawler crane.

[0048] When using this invention to remove abandoned piles, the abandoned pile must first be accurately measured and positioned. An excavator is then used to dig out the pile head to ensure that this invention is correctly aligned with the abandoned pile. Next, a crawler crane 7 (crawler-type crane) with a vibrating head 6 is used to clamp the connecting sleeve of the lattice column extension frame 5. After the device is lifted vertically, the steel square soil-breaking module 1 is placed over the abandoned pile to be removed. At this time, the vibrating head 6 applies downward vibration and pressure, causing the steel square soil-breaking module 1 to insert into the soil layer. The steel square soil-breaking module 1 gradually cuts through the soil surrounding the abandoned pile. As the steel square soil-breaking module 1 enters the soil layer, the steel bottom-lifting pile-pulling bolt 2 moves upward along the inclined chute 13 due to the upward pressure and friction between the abandoned pile body and the soil, reaching the lower space (variable cross-section) of the inclined plate 12, thus avoiding the pile body. With further vibration and pressure, the steel square excavation module 1, the steel bottom-supporting pile extraction bolt 2, and the lattice column 3 are completely pressed into the ground. After the steel square excavation module 1 reaches the bottom of the abandoned pile, it should be further lowered to about 1 meter below the pile bottom. The extra 1-meter depth provides space and time for the steel bottom-supporting pile extraction bolt 2 to move downwards along the sliding groove 13 when the device is pulled out upwards. Throughout the pressing process, the steel square excavation module 1 completely cuts and separates the soil around the abandoned pile, while the lattice column 3 completely encloses the abandoned pile, greatly reducing the frictional resistance between the pile and the soil during pile extraction and increasing the speed of pile removal.

[0049] Next, while vibrating, the lattice column 3 and the steel square excavation module 1 are pulled upwards. At this time, the soil inside the steel square excavation module 1 fractures and separates due to external vibration and its own soil viscosity, forming a cavity in the steel square excavation module 1. At this time, there is no soil obstructing the lower part of the steel bottom-supporting pile extraction bolt 2. At the same time, the soil on the outside of the steel square excavation module 1 will rub against the pull ring seat 23 and pull ring 24 that are exposed outside, so that the steel bottom-supporting pile extraction bolt 2 can reach the lower bolt slot 131 along the sliding groove 13 to catch the waste pile at the bottom, thereby removing the waste pile in one go.

[0050] After the waste pile is completely removed from the ground, a steel wire rope is tied to the pull ring 24. The steel wire rope is pulled upward by an external crane, which moves the entire steel bottom-supporting pile extraction bolt 2 upward. When the steel bottom-supporting pile extraction bolt 2 is completely removed from the bottom of the pile, it no longer provides support to the waste pile. At this time, the waste pile is removed from the device, completing the entire pile extraction process.

[0051] Reference Figure 12 A construction method for a convenient lattice-type pile extraction device includes the following steps:

[0052] Step 1, Construction Preparation, as follows:

[0053] Before construction, the site should be leveled, utilities should be opened, and surrounding obstacles should be cleared. Machinery, equipment, and tools should be prepared.

[0054] Familiarize yourself with the pile foundation drawings of old building projects, determine the scope of pile removal, customize this device according to the pile length to be removed, and formulate a construction plan based on construction requirements, site conditions, equipment conditions, etc., to determine the equipment path and pile removal sequence.

[0055] After the crawler crane, vibratory head, hydraulic power station and this device are connected together, they should be debugged and inspected to ensure that the equipment operates normally and safely.

[0056] Step 2, pile head positioning, as follows:

[0057] Use a positioning device to locate the old pile foundation that needs to be removed, and use an excavator to dig out the pile head at the location of the old pile foundation.

[0058] Step 3: Vibration and sinking, as follows:

[0059] The crawler crane 7 is used to lift the vibrating head 6, the hydraulic power station is started, and the vibrating head clamp is used to lift the device so that the steel square soil breaking module covers the waste pile head.

[0060] Start the vibrating head 6. Under the action of high-frequency vibration, the whole device sinks. When the steel bottom-supporting pile pulling bolt touches the top of the waste pile, it will slide upward along the sliding groove to avoid the waste pile body.

[0061] During the vibration sinking process, the soil layer is relatively dry, resulting in greater friction between the device and the soil layer, which affects the pile extraction efficiency. Water injection on the soil surface is adopted to increase its lubrication, enabling the device to sink faster.

[0062] The sinking continues until the predetermined pile bottom elevation is reached. The pile bottom elevation is the reserved depth below the pile bottom. Generally, the pile bottom elevation is about 1 meter below the pile bottom. The 1-meter depth provides space and time for the steel bottom-supporting pile pulling bolt 2 to move downward along the sliding groove 13 when the device is pulled out upward later.

[0063] Step 4: After the pile has sunk to the designated position, perform a trial lift. Once the trial lift is complete, vibrate it together with the precast piles, as follows:

[0064] After the sinking reaches the predetermined elevation, a trial lifting process is required to ensure that the steel bottom-supporting pile puller slides down to the puller groove and locks in place.

[0065] If only this device lifts during the trial lifting process and fails to lift the abandoned piles inside the lattice column together, it is necessary to continue vibrating and sinking for a certain distance before trying to lift again until the steel bottom-supporting pile pulling bolt can lift the abandoned piles together, and the trial lifting ends.

[0066] After the trial lifting is completed, start the vibration mode of the vibratory hammer and lift the device and the waste pile together at a uniform speed; when the bottom of the device and the bottom of the waste pile are lifted together until they are off the soil surface, the lifting is completed and the vibration mode of the vibratory head is turned off.

[0067] Step 4: Slide the bolt upwards to unlock the precast pile, as shown below:

[0068] After the device and the waste pile are lifted, the crawler crane hook and the two ends of the pull ring are connected manually with a chain lock; the crawler crane winch is started to lift the hook, and the chain lock pulls the pull ring to slide the steel bottom-supporting pile extraction bolt upward along the slide groove; after the steel bottom-supporting pile extraction bolt slides to the upper opening of the slide groove, the waste pile in the lattice column is removed from the device because the bolt is no longer locked at the bottom of the pile.

[0069] Step 5: Lift the lattice column and detach it from the precast pile, as follows:

[0070] The vibrating head clamps the lattice column and lifts it upwards at a constant speed until the precast pile is completely detached from the lattice column, at which point the pile extraction is completed.

[0071] The construction method in this embodiment utilizes a device consisting of a steel square breaking module at the bottom, steel bottom-supporting pile extraction bolts, a lattice column in the middle, lattice column connecting units, and a lattice column extension frame at the top to enclose the precast pile. Under the vibration pressure of a vibratory hammer, the steel square breaking module sinks and cuts, separating the waste pile from the surrounding soil. Then, the vibratory hammer quickly pulls out the device and the precast pile together as a whole. If the soil layer is relatively dry during construction, the friction between the lattice column and the soil layer is large, affecting the pile extraction efficiency. Water injection into the soil surface is used for lubrication to reduce frictional resistance and thus accelerate the construction speed.

[0072] The embodiments described in this specification are merely examples of implementations of the inventive concept and are for illustrative purposes only. The scope of protection of this utility model should not be considered limited to the specific forms described in these embodiments; rather, it extends to equivalent technical means that can be conceived by those skilled in the art based on the inventive concept.

Claims

1. A portable lattice type pile pulling device, characterized in that, The device includes a steel square earth-breaking module, a lattice column, a lattice column connecting unit, and a lattice column extension frame connected sequentially from bottom to top. The lattice column extension frame is connected to the vibrating head of the crawler crane. The lower part of the steel square earth-breaking module is a rectangular hollow square earth-breaking head. The upper front of the steel square earth-breaking module is provided with an inclined plate to form a variable cross-section. The minimum point of the variable cross-section is connected to the lattice column, and the minimum cross-section of the variable cross-section is the same as the cross-section of the lattice column. The left and right sides of the square earth-breaking head have inclined grooves. Steel bottom-supporting pile-pulling bolts are slidably fitted onto the two inclined grooves. The highest point of the inclined groove is close to the front of the square earth-breaking head, that is, at the maximum cross-section of the inclined plate, and the lowest point of the inclined groove is located in the middle of the square earth-breaking head.

2. A portable lattice type pile extractor as claimed in claim 1, wherein, The inclined chute has an arc-shaped bolt groove, which is compatible with the steel bottom-supporting pull-out bolt.

3. A portable lattice type pile pulling device according to claim 1 or 2, characterized in that The steel bottom-supporting pile pulling bolt includes a bolt body, a circular limiting head, a pull ring seat, and a steel circular pull ring. The bolt body has circular limiting heads at both ends, and a trapezoidal pull ring seat with holes is located outside the circular limiting head. A steel circular pull ring is installed on the pull ring seat.

4. A portable lattice type pile pulling device according to claim 1 or 2, characterized in that, The steel square ground-breaking module is made of rectangular hollow steel and steel plates fixedly connected together.

5. A portable lattice type pile pulling device according to claim 1 or 2, wherein The lattice column is a hollow column, which is made of four lattice column angle steels and multiple lattice column gusset plates. The lower part of the lattice column is fixedly connected to the upper part of the steel square ground-breaking module, and the upper part of the lattice column is fixedly connected to the lattice column connecting unit.

6. A portable lattice type pile pulling device according to claim 1 or 2, characterized in that The lattice column connection unit includes a connection socket, a sleeve, and a connection plug. The upper part of the lattice column is fixedly connected to the connection socket, the connection socket is fixedly connected to the sleeve, the sleeve is fixedly connected to the connection plug, and the connection plug is fixedly connected to the lattice column extension frame. The connecting socket is wrapped around the outer side of the upper angle steel of the lattice column and is welded from multiple steel plates. The connecting socket is fixedly connected to the angle steel of the lattice column. The sleeve is a rectangular hollow steel. The sleeve is wrapped around the outside of the connector and is fixedly connected to the connector. The sleeve has a circular bolt hole and is fixedly connected to the connector by bolts. The connector is welded from multiple steel plates. The lower part of the connector is inserted into the sleeve. A circular bolt hole is provided on the lower part of the connector. The lower part of the connector is connected to the sleeve by bolts. The upper part of the connector is fixedly connected to the lower part of the lattice column extension frame.

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