Pile puller for engineering pile

Abstract

The utility model provides a pile extractor of engineering pile, including side plate, at least two bottom plate, reset device and locking device, bottom plate includes the rotation end and away from the movable end of rotation end, bottom plate is rotatablely connected with side plate at the rotation end, the reset device is connected with the movable end and side plate bottom end, the locking device is connected with the side plate. The locking device is connected with the bottom plate or the side plate at the rotating end, and when the movable end rotates to the bottom face of the side plate, the locking device is used for locking rotation of the bottom plate so that the bottom plate can be kept on the bottom face of the side plate. According to the pile extractor for the engineering pile, resistance generated when the engineering pile is extracted by a soil body outside the pile extractor is blocked, the pile extracting speed is increased, construction can be conducted through small-size and low-power equipment, large-size equipment does not need to be transferred to a construction site to extract the pile, the construction efficiency of pile extracting is improved, the construction period is shortened, and the construction cost is saved; the method is more economical and environment-friendly.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering pile extraction, in particular to a pile extractor for engineering piles. Background Art

[0002] With the increasing number of projects such as house construction and bridge reconstruction, when the main part of the structure is demolished, engineering piles (such as square piles) are left underground. These remaining engineering piles will conflict with the pile foundation construction of the new structure and need to be removed urgently. The traditional pile extraction technology is to use a rotary drilling rig to extract the pile foundation, a rotary drilling rig to cut the soil around the pile, and then lift and extract the pile as a whole. However, this pile extraction construction method has the following disadvantages: large pile extraction equipment needs to be called to the construction site, and the transportation cost of large pile extraction equipment and its own pile extraction operation is high and the efficiency is low; large pile extraction equipment such as drilling rigs are heavy and have strict site requirements; therefore, the overall construction efficiency is low and the construction period is long; carbon emissions are high, noise is high, and environmental pollution is serious. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the defects of low efficiency, high cost and poor environmental protection effect of engineering pile pulling in the prior art, and to provide an engineering pile puller.

[0004] The utility model solves the above technical problems through the following technical solutions:

[0005] A pile puller for an engineering pile, the engineering pile comprising a pile body and a pile tip, the pile puller comprising a side plate for surrounding the side of the engineering pile, at least two bottom plates, a resetting device and a locking device, the two bottom plates being connected to the bottoms of two opposite sides of the side plates;

[0006] The bottom plate comprises a rotating end and a movable end away from the rotating end, the bottom plate is rotatably connected to the side plate at the rotating end, and the reset device is connected to the movable end and the bottom end of the side plate;

[0007] When the side plate is sunk in the height direction of the engineering pile and gradually surrounds the engineering pile, the two bottom plates are pushed open by the pile tip, and the movable end rotates around the rotating end from the bottom surface of the side plate to the inner wall of the side plate and is retracted to the inner wall; when the movable end moves to the pile tip, the resetting device is used to drive the movable end to rotate from the inner wall to the bottom surface of the side plate, and the two bottom plates are flattened along the bottom surface of the side plate and connected to form a flat plate;

[0008] The locking device is connected to the bottom plate or the side plate at the rotating end, and when the movable end is rotated to the bottom surface of the side plate, the locking device is used to lock the rotation of the bottom plate so that the bottom plate remains on the bottom surface of the side plate.

[0009] In this scheme, the pile puller realizes the change of two working states (the folded state on the inner wall of the side plate and the flattened state on the bottom surface of the side plate) through two rotatable bottom plates, which is adapted to the cooperation between the pile puller and the engineering pile when the pile is inserted and pulled out. That is, when the pile is inserted, the two bottom plates are pushed open by the engineering pile and are in a folded state, which does not affect the insertion of the side plates; while when the pile is pulled out, the two bottom plates are in a flattened state, supporting the engineering pile to be pulled out together. Through the reset device, when the pile puller is in place (that is, when the movable end of the bottom plate moves to the pile tip), the bottom plate is driven to rotate and restore to the flattened state of the bottom surface, and the engineering pile is completely placed in the pile puller. Through the locking device, when the bottom plate is reset to the bottom surface, the bottom plate is locked to continue to rotate, ensuring that the bottom plate can effectively support the engineering pile and pull it out upward together. By arranging the locking device on the two oppositely arranged bottom plates, the forces on the two sides of the engineering pile are balanced, which is conducive to reducing the resistance to pile pulling.

[0010] The pile puller prevents the soil outside the pile puller from generating resistance to the engineering piles when they are pulled out, thereby increasing the speed of pile pulling. In addition, small, low-power equipment can be used for construction without the need to mobilize large equipment to the construction site for pile pulling, thereby improving the construction efficiency of pile pulling, reducing the construction period, saving construction costs, and being more economical and environmentally friendly.

[0011] Preferably, the side panel comprises a first half-wrapped side panel and at least one second half-wrapped side panel, and at least one second half-wrapped side panel is connected to the first half-wrapped side panel at the bottom of the first half-wrapped side panel along the height direction to form an inner cavity for accommodating the engineering piles;

[0012] The height of the first half-wrapped side plate is not less than the length of the engineering pile, and the height of the second half-wrapped side plate is not less than the width of the bottom plate.

[0013] In this solution, the side panels are divided into two half-wrapped side panels to facilitate on-site construction operations. When there are already materials that can be used as the first half-wrapped side panels at the engineering pile site (for example, there may be U-shaped Larsen steel sheet piles on site), it is only necessary to connect the second half-wrapped side panels on the basis of the existing first half-wrapped side panels to form a side panel that can accommodate the engineering piles, further saving construction costs. Among them, by the height of the first half-wrapped side panels being not less than the length of the engineering piles, the engineering piles can lean against the first half-wrapped side panels, making it difficult to topple over, and the pile pulling construction process is stable. By the height of the second half-wrapped side panels being not less than the width of the bottom plate, the bottom plate can completely rest against the inner wall of the second half-wrapped side panels when folded, which is conducive to the stability of pile pulling.

[0014] Preferably, the side panel includes at least two second half-wrapped side panels, and the two second half-wrapped side panels are respectively connected to the first half-wrapped side panel at the bottom and the top of the first half-wrapped side panel along the height direction.

[0015] In this solution, the second half-package side plate is connected to the bottom and top of the first half-package side plate in the height direction, so that the engineering piles will not overturn when pulling out the piles, avoiding interruption of construction or inability to construct, which is beneficial to the efficiency of pile pulling.

[0016] Preferably, at least two lifting ears are provided at the top of the side plate in the height direction, and the two lifting ears are provided on two opposite sides of the side plate.

[0017] In this solution, when the pile pulling force acting on the pile puller is insufficient, the auxiliary equipment can increase the pile pulling force and the pile pulling efficiency through the above-mentioned lifting lugs.

[0018] Preferably, the reset device includes a plurality of elastic members, one end of each of which is connected to the movable end, and the other end of each of which is connected to the bottom end of the side panel and is located on the inner wall of the side panel opposite to the movable end.

[0019] In this solution, the resetting device is through the elastic member and adjusts its length, so that the elastic member accumulates elastic force when the bottom plate is in the folded state, and when the bottom surface of the side plate is lower than the bottom surface of the engineering pile, the bottom plate no longer rests on the engineering pile, and the bottom plate automatically resets to the flattened state (that is, the bottom plate rotates to the bottom surface position of the side plate) under the action of the elastic member. The two ends of the elastic member are arranged in the above position to ensure that the active end is effectively stretched for rotation.

[0020] Preferably, the elastic members are provided on both sides of the two bottom plates along the width direction.

[0021] And / or, when the bottom plate is rotated to be flattened along the bottom surface, the elastic member is parallel to the width direction.

[0022] In this solution, elastic members are provided on both sides of the two bottom plates along the width direction, so that the forces on both sides of the bottom plates are balanced, the positions are not offset, and the reset between the two bottom plates is consistent. The elastic members are arranged parallel to the width direction, which is conducive to the consistent reset of the two bottom plates.

[0023] Preferably, the reset device also includes a plurality of connecting plates of the elastic member, and the elastic member is connected to the bottom plate and the side plate through the connecting plates; the connecting plates are arranged on the opposite sides of the side plate and the bottom plate when they are flattened, and the connecting plates arranged on the bottom plate match the shape of the inner walls of the side plates.

[0024] In this solution, the elastic member is firmly connected to the bottom plate and the side plate through the connecting plate. The connecting plate is arranged on the opposite sides of the side plate and the bottom plate when they are flattened, so that the two ends of the elastic member are connected to the two opposite surfaces and are in an initial state without force. The connecting plate arranged on the bottom plate is matched with the inner wall shape of the side plate to avoid interference between the connecting plate and the inner wall of the side plate when the bottom plate is folded to the inner wall of the side plate, resulting in failure to fold.

[0025] Preferably, the pile puller further comprises a rotating connection member, the rotating connection member comprises a rotating part, two fixed parts and an axle pin, two ends of the rotating part are rotatably connected to the fixed part through the axle pin, the fixed part is connected to the side plate, and the rotating part is connected to the bottom plate;

[0026] The rotating part is also connected to the locking device, and the locking device includes an abutment part. When the movable end rotates to the bottom surface of the side plate, the abutment part abuts against the outer wall of the side plate to keep the bottom plate on the bottom surface of the side plate.

[0027] In this solution, the bottom plate is rotated relative to the side plate by the above-mentioned rotating connection member. The ground connection part of the locking device abuts against the outer wall of the side plate, so that the bottom plate cannot continue to rotate, thereby keeping the bottom plate on the bottom horizontal plane of the side plate, ensuring that the effective supporting engineering piles are pulled out.

[0028] Preferably, the cross-sectional profile of the fixing portion is an inverted water drop shape, and the cross-sectional profile of the fixing portion includes a sharp corner, and when the movable end is rotated to the inner wall, the sharp corner is arranged along the soil burrowing direction.

[0029] In this solution, the fixing part adopts an inverted water drop shape, and its sharp corner is arranged along the direction of entering the soil, which reduces the resistance of the pile puller when it is inserted into the soil, makes it easy to sink the pile, and is conducive to improving the efficiency of pile pulling construction.

[0030] Preferably, the locking device is a triangular moment-resisting member, the abutting portion is a first side surface of the moment-resisting member connected to the rotating portion, and the moment-resisting member further comprises a vertex angle opposite to the first side surface and away from the rotating portion;

[0031] When the movable end rotates to the inner wall, the top angle is arranged along the soil burying direction; when the movable end rotates to the bottom surface of the side plate, the first side surface abuts against the outer wall of the side plate.

[0032] In this solution, a triangular moment-resisting member is used as a locking device, which has a simple structure. The first side surface of the triangular moment-resisting member abuts against the outer wall of the side plate to reliably lock the bottom plate, and the locking method is more reliable. The above-mentioned vertex angle is used to reduce the resistance of the pile puller when it is inserted into the soil, making it easier to sink the pile, thereby facilitating the improvement of the efficiency of pile pulling construction.

[0033] The positive progressive effect of the utility model is that the pile puller of the engineering pile blocks the resistance of the soil outside the pile puller to the engineering pile when it is pulled out, thereby improving the pile pulling speed, and can use small and low-power equipment for construction without mobilizing large equipment to the construction site for pile pulling, thereby improving the construction efficiency of pile pulling, shortening the construction period, saving construction costs, and being more economical and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the bottom structure of the pile puller after the bottom plate of the pile puller according to the embodiment of the utility model is reset.

[0035] Figure 2 It is a bottom view of the bottom structure of the pile puller after the bottom plate of the pile puller according to the embodiment of the utility model is restored.

[0036] Figure 3 It is a bottom view of the bottom partial structure of the pile puller after the bottom plate of the pile puller according to the embodiment of the utility model is reset.

[0037] Figure 4 It is a schematic diagram of the bottom structure of the pile puller after the bottom plate of the pile puller according to the embodiment of the utility model is reset.

[0038] Figure 5 It is a schematic diagram of the bottom structure of the pile puller before the bottom plate of the pile puller according to the embodiment of the utility model is reset.

[0039] Figure 6 It is a bottom view of the bottom structure of the pile puller before the bottom plate of the pile puller according to the embodiment of the utility model is reset.

[0040] Figure 7 This is a bottom view of the partial structure of the bottom of the pile puller before the bottom plate of the pile puller according to the embodiment of the utility model is reset, and the engineering piles are removed from the figure.

[0041] Figure 8 It is a schematic diagram of the top structure of the pile puller according to an embodiment of the utility model.

[0042] Fig. 9 It is a schematic diagram of the structural combination of the base plate, the rotating connecting member and the locking device of an embodiment of the utility model.

[0043] Fig.10 It is a schematic diagram of the structural decomposition of the base plate, the rotating connecting member and the locking device of an embodiment of the utility model.

[0044] Description of reference numerals:

[0045] Engineering pile 1

[0046] Pile 11

[0047] Pile tip 12

[0048] Side Panel 2

[0049] Height direction of side panel A

[0050] The first half of the side panel 21

[0051] The first half of the side panel waist steel plate 211

[0052] Side steel plate of the first half package side plate 212

[0053] The second half of the side panel 22

[0054] The waist steel plate of the second half side panel 221

[0055] The side steel plate of the second half package side plate 222

[0056] Inner wall of side panel 23

[0057] The outer wall of the side panel 24

[0058] Bottom plate 3

[0059] Width direction of the bottom plate B

[0060] Rotating end 31

[0061] Activity end 32

[0062] Reset device 4

[0063] Elastic member 41

[0064] Connecting plate 42

[0065] Locking device 5

[0066] Contact part 51

[0067] First side 52

[0068] Top Angle 53

[0069] Rotating connector 6

[0070] Rotating portion 61

[0071] Fixing portion 62

[0072] Sharp Corner 63

[0073] Axis pin 64

[0074] Lug 7

[0075] Buried direction C DETAILED DESCRIPTION

[0076] A preferred embodiment is given below, and the present invention is described more clearly and completely in conjunction with the accompanying drawings.

[0077] The present embodiment provides a pile puller for an engineering pile 1, which is a pile driven into the soil when building a house or a bridge. When the main structure of the house or bridge is demolished and a new house or bridge needs to be built on the original site, it is necessary to pull out these engineering piles 1 to avoid conflicts with the pile foundation of the new structure during construction. In the present embodiment, the engineering pile 1 is specifically a square pile, so it is also called a square pile. The square pile is a common pile foundation on a construction site. The engineering pile 1 includes a pile body 11 and a pile tip 12.

[0078] like Figure 1-10 As shown, the pile puller comprises a side plate 2 for surrounding the side of the engineering pile 1, at least two bottom plates 3, a reset device 4 and a locking device 5, the two bottom plates 3 are connected to the bottoms of two opposite sides of the side plate 2, the bottom plate 3 comprises a rotating end 31 and a movable end 32 away from the rotating end 31, the bottom plate 3 is rotatably connected to the side plate 2 at the rotating end 31, the reset device 4 is connected to the movable end 32 and the bottom end of the side plate 2, when the side plate 2 sinks along the height direction of the engineering pile 1 (i.e., the height direction A of the side plate 2) and gradually surrounds the engineering pile 1, the two bottom plates 3 are moved by the pile tip 12 The movable end 32 rotates around the rotating end 31 from the bottom surface of the side plate 2 to the inner wall 23 of the side plate and is folded to the inner wall; when the movable end 32 of the bottom plate 3 moves to the surface of the pile tip 12, the reset device 4 is used to drive the movable end 32 to rotate from the inner wall 23 to the bottom surface of the side plate 2, and the two bottom plates 3 are flattened along the bottom surface of the side plate 2 and connected to form a flat plate; the locking device 5 is connected to the bottom plate 3 or the side plate 2 at the rotating end 31, and when the movable end 32 rotates to the bottom surface of the side plate 2, the locking device 5 is used to lock the rotation of the bottom plate 3 so that the bottom plate 3 remains on the bottom surface of the side plate 2.

[0079] In this embodiment, the side plate 2 is composed of two half-wrapped side plates, including a first half-wrapped side plate 21 and a second half-wrapped side plate 22. The first half-wrapped side plate 21 is a U-shaped Larsen steel sheet pile, and the second half-wrapped side plate 22 is a half-wrapped sleeve. Larsen steel sheet piles are a new type of building material commonly seen on construction sites. They are used as retaining walls, water retaining walls, and sand retaining walls when building bridge cofferdams, laying large pipelines, and excavating temporary ditches; they are used as retaining walls, retaining walls, and embankment revetments at docks and unloading yards, and play an important role in engineering. This embodiment uses the Larsen steel sheet piles already on site to make a pile puller for pulling out the engineering piles 1. The Larsen steel sheet pile (i.e., the first half-wrapped side plate 21) includes a waist steel plate 211 located in the middle and two side steel plates 212. The two side steel plates 212 are inclined outward relative to the waist steel plate 211 to form a U-shaped half-wrapped structural member. Similarly, the half-enclosed sleeve (i.e., the second half-enclosed side plate 22) is composed of a middle waist steel plate 221 and two side steel plates 222. After the Larsen steel sheet pile and the two side steel plates 212 and 222 of the half-enclosed sleeve are welded, an inner cavity for accommodating square piles is formed. Among them, the height of the Larsen steel sheet pile is not less than the length of the square pile, and the square pile can lean on the Larsen steel sheet pile, so that it is not easy to tip over, and the pile pulling construction process is stable. The height of the half-enclosed sleeve is not less than the width of the bottom plate 3, so that the bottom plate 3 can completely lean against the inner wall of the half-enclosed sleeve when it is folded, which is conducive to the stability of pile pulling. The width of the waist steel plate 221 of the half-enclosed sleeve should not be less than the width of the square pile, nor should it be greater than the effective width of the Larsen steel sheet pile. Here, the effective width of the Larsen steel sheet pile refers to the effective width that can be used to accommodate the square pile after the Larsen steel sheet piles connected to each other are removed from the parts on both sides used for connection. The size of the steel plates 222 on both sides of the half-enclosed sleeve is determined by the size of the square pile and the size of the steel plates 212 on both sides of the Larsen steel sheet pile, and the overall requirements must meet the following: After the Larsen steel sheet pile and the steel plates 212 and 222 on both sides of the half-enclosed sleeve are butt-welded, the length of the internal space formed is equal to the sum of the length of the square pile and twice the thickness of the supporting bottom plate 3. The height of the steel plates 222 on both sides of the half-enclosed sleeve is equal to the height of the waist steel plate 221 in the middle.

[0080] In this embodiment, the side panel 2 is divided into two half-wrapped side panels, which is convenient for on-site construction operations; and the existing Larsen steel sheet piles are used, so that no material is wasted, construction costs can be further saved, and it is more environmentally friendly. In other embodiments, if there are no existing Larsen steel sheet piles on site, a separate first half-wrapped side panel 21 can be made, or the side panel 2 can also be an integral tubular steel plate member, rather than two half-wrapped side panels welded together, and the tubular steel plate matches the specific shape of the engineering pile 1.

[0081] The pile puller realizes the change of two working states (the folded state on the inner wall of the side plate 2 and the flattened state on the bottom surface of the side plate 2) through two rotatable bottom plates 3, which is adapted to the cooperation between the pile puller and the engineering pile 1 during the pile insertion and pile pulling. That is, when the pile is inserted, the two bottom plates 3 are pushed open by the engineering pile 1 and are in the folded state, which does not affect the insertion of the side plate 2; while when the pile is pulled out, the two bottom plates 3 are in the flattened state, supporting the engineering pile 1 to be pulled out together. Through the reset device 4, when the pile puller is in place (that is, when the bottom surface of the side plate 2 is lower than the bottom surface of the engineering pile 1), the bottom plate 3 is driven to rotate and restore to the flattened state of the bottom surface, and the engineering pile 1 is completely placed in the pile puller. Through the locking device 5, when the bottom plate 3 is reset to the bottom surface, the bottom plate 3 is locked to continue to rotate, ensuring that the bottom plate 3 can effectively support the engineering pile 1 and pull it out upward together. By arranging the locking device 5 on the two oppositely arranged bottom plates 3, the corresponding two sides of the engineering pile 1 are balanced, which is conducive to reducing the pile pulling resistance.

[0082] The pile puller prevents the soil outside the pile puller from generating resistance to the engineering pile 1 when it is pulled out, thereby increasing the pile pulling speed. In addition, small-sized, low-power equipment can be used for construction without mobilizing large-scale equipment to the construction site for pile pulling. This improves the construction efficiency of pile pulling, reduces the construction period, saves construction costs, and is more economical and environmentally friendly.

[0083] In other embodiments, according to the specific shape type of the engineering pile 1 and the required pile pulling effect, the shape of the pile puller and the number of base plates 3 can be adjusted as needed, and is not limited to being applied only to square piles or having only two base plates 3.

[0084] Among them, Figure 1 and Figure 8 As shown, there are two second half-wrapped side panels 22, and the two second half-wrapped side panels 22 are respectively connected to the first half-wrapped side panels 21 at the bottom and top of the first half-wrapped side panels 21 along the height direction A, so that the engineering pile 1 will not overturn during pile extraction, avoiding interruption of construction or inability to construct, which is beneficial to pile extraction efficiency. According to the size of the second half-wrapped side panels 22 and construction requirements, the number of the second half-wrapped side panels 22 can be adjusted accordingly.

[0085] Among them, Figure 8 As shown, the second half-wrapped side plate 22 disposed on the top of the first half-wrapped side plate 21 is provided with two lifting ears 7 at its top along the height direction A, and the two lifting ears 7 are provided on two opposite sides of the second half-wrapped side plate 22. When the pile pulling force acting on the pile puller is insufficient (for example, sometimes the vibration hammer of the pile puller is not enough to overcome the resistance to complete the pile pulling), the auxiliary equipment (for example: the truck crane) can improve the pile pulling force and the pile pulling efficiency through the lifting ears 7 provided above.

[0086] In other embodiments, the number and location of the lifting lugs 7 can be adjusted accordingly as needed. For example, if the side panel 2 is an integrated steel plate structure, the lifting lugs 7 are disposed on the top of the integrated side panel 2 instead of being disposed on the second half-package side panel 22.

[0087] like Figure 2 and Figure 4 As shown, the reset device 4 includes a plurality of elastic members 41, which are specifically springs, one end of which is connected to the movable end 32, and the other end of which is connected to the bottom end of the side panel 2 and is located on the inner wall of the side panel 2 opposite to the movable end 32. The reset device 4 uses the elastic member 41 and adjusts its length so that the elastic member 41 accumulates elastic force when the bottom panel 3 is in the retracted state, and when the bottom surface of the side panel 2 is lower than the bottom surface of the engineering pile 1, the bottom panel 3 no longer rests on the engineering pile 1, and the bottom panel 3 automatically resets to the flattened state (i.e., the bottom panel 3 rotates to the bottom surface position of the side panel 2) under the action of the elastic member 41. The two ends of the elastic member 41 are arranged in the above-mentioned positions to ensure that the movable end 32 is effectively stretched for rotation.

[0088] Among them, Figure 4 As shown, elastic members 41 are provided on both sides of the two bottom plates 3 along the width direction B, so that the forces on both sides of the bottom plates 3 are balanced, the positions are not offset, and the reset between the two bottom plates 3 is also consistent. The connection position of the elastic member 41 is adjusted so that when the bottom plate 3 is rotated to be flattened along the bottom surface, the elastic member 41 is parallel to the width direction B. Such a setting is conducive to the consistent reset of the two bottom plates 3.

[0089] Among them, Figure 7 As shown, the reset device 4 also includes a plurality of connecting plates 42 of elastic members 41, and a hole is provided in the middle of the connecting plates 42 to facilitate the connection of the elastic members 41 (spring). The elastic members 41 are connected to the bottom plate 3 and the side plates 2 through the connecting plates 42; the connecting plates 42 are arranged on the opposite sides of the side plates 2 and the bottom plate 3 when they are flattened, and the connecting plates 42 arranged on the bottom plate 3 match the shape of the inner wall 23 of the side plate. Through the connecting plates 42, the elastic members 41 are firmly connected to the bottom plate 3 and the side plates 2. When the connecting plates 42 are arranged on the opposite sides of the side plates 2 and the bottom plate 3 when they are flattened, the two ends of the elastic member 41 are connected to the two opposite surfaces and are in an initial state without force. When the connecting plates 42 arranged on the bottom plate 3 match the shape of the inner wall 23 of the side plate, it is avoided that when the bottom plate 3 is folded to the inner wall 23 of the side plate, the connecting plates 42 and the inner wall 23 of the side plate interfere with each other and cannot be folded. In this embodiment, since the steel plates 212 on both sides of the Larsen steel sheet pile are inclined, when the bottom plate 3 is retracted to the inner wall of the Larsen steel sheet pile, the spring connecting plate 42 on the bottom plate 3 must also be inclined to avoid the bottom plate 3 from colliding with the inner wall of the Larsen steel sheet pile; accordingly, when the bottom plate 3 is reset, the connecting plate 42 also needs to be set obliquely downward.

[0090] like Figure 1 and Fig. 9 , 10 As shown, the pile puller also includes a rotating connection member 6, which is a connecting shaft, including a rotating part 61, two fixed parts 62 and an axle pin 64. The two ends of the rotating part 61 are rotatably connected to the fixed part 62 through the axle pin 64. The fixed part 62 is welded to the side plate 2, and the rotating part 61 is welded to the bottom plate 3. The rotating part 61 is also welded to the locking device 5, and the locking device 5 includes an abutting part 51. When the movable end 32 rotates to the bottom surface of the side plate 2, the abutting part 51 abuts against the outer wall 24 of the side plate, so that the bottom plate 3 is kept on the bottom surface of the side plate 2. The rotating connection member 6 provided above realizes the rotation of the bottom plate 3 relative to the side plate 2. The ground contact part of the locking device 5 abuts against the outer wall 24 of the side plate, so that the bottom plate 3 cannot continue to rotate, thereby keeping the bottom plate 3 on the bottom horizontal plane of the side plate 2, ensuring that the effective supporting engineering pile 1 is pulled out. The overall length of the rotating connection member 6 should not be less than 2 / 3 of the length of the bottom plate 3, nor should it be greater than the length of the bottom plate 3.

[0091] Among them, Figure 5 As shown, the cross-sectional profile of the fixing portion 62 is an inverted water drop shape, and the cross-sectional profile of the fixing portion 62 includes a sharp corner 63. When the movable end 32 rotates to the inner wall, the sharp corner 63 is arranged along the earth-entering direction C. The fixing portion 62 is in an inverted water drop shape, and its sharp corner 63 is arranged along the earth-entering direction C, which reduces the resistance of the pile puller when it is inserted into the earth, makes it easy to sink the pile, and is conducive to improving the efficiency of pile pulling construction.

[0092] Among them, Figure 2 , 5 and Fig.10 As shown, the locking device 5 is a triangular moment-resisting member, and its cross section presents an acute-angled isosceles triangle. The abutment portion 51 is a first side surface 52 connecting the moment-resisting member and the rotating portion 61, and the moment-resisting member also includes a vertex 53 opposite to the first side surface 52 and away from the rotating portion 61;

[0093] When the movable end 32 rotates to the inner wall, the top angle 53 is arranged along the soil burying direction C; when the movable end 32 rotates to the bottom surface of the side plate 2, the first side surface 52 abuts against the outer wall 24 of the side plate.

[0094] The triangular moment-resisting member is used as the locking device 5, and the structure is simple. The first side surface 52 of the triangular moment-resisting member abuts against the outer wall 24 of the side plate, and the bottom plate 3 is reliably locked, and the locking method is more reliable. The above-mentioned top angle 53 is used to reduce the resistance of the pile puller when it is inserted into the soil, and the pile is easily sunk, which is beneficial to improve the efficiency of pile pulling construction.

[0095] In this embodiment, when the pile puller is used, the use steps may be:

[0096] The existing Larsen steel sheet piles are used to make the integral steel structure of the pile puller and welded; the bottom supporting base plate 3 is horizontal, and the springs (i.e., elastic members 41) of corresponding length are selected according to the distance between the two spring connecting plates 42 for connection, and the springs are in an unstretched state at this time. The supporting base plate 3 is rotated to make it close to the waist steel plates 211 and 221, and the springs are in a stretched state at this time.

[0097] The lower end of the pile puller vertically covers the existing square pile and starts to vibrate and sink into the soil. During the sinking process, the supporting bottom plate 3 is always tightly clamped between the square pile and the waist steel plate of the Larsen steel sheet pile, and between the square pile and the waist steel plate of the half-wrapped sleeve.

[0098] When the supporting bottom plate 3 moves away from the connecting shaft and enters the pile tip area, it gets rid of the restriction on one side of the square pile. Under the synergistic effect of spring tension and vibration of the pulling machine, the supporting bottom plates 3 on both sides begin to rotate slowly. At this time, the sinking construction continues. At the same time, the supporting bottom plates 3 on both sides continue to rotate. After rotating to a certain angle, when the side of the supporting bottom plate 3 away from the rotating end 31 is lower than the bottom of the square pile, it begins to pull back slowly.

[0099] When the pile puller is affected by the deadweight resistance of the pile during the pulling process, the pile puller is vibrated and sunk again, and then pulled back. This vibration, sinking and pulling back are repeated several times until the bottom plates 3 on the left and right sides are completely reset under the deadweight of the pile.

[0100] After complete resetting, the triangular moment-resisting members (i.e., locking devices 5) on both sides have rotated to be close to the waist steel plate 211 of the Larsen steel sheet pile and the waist steel plate 221 of the half-enclosed sleeve, and the deadweight of the square pile acts on the supporting base plate 3, so that the triangular moment-resisting members on both sides are subjected to torque, and the torques on both sides act on the square pile itself, so that the structure is balanced in force, that is, the supporting base plate 3 is locked under the deadweight of the structure, and the square pile is wrapped to the bottom.

[0101] If there is too much resistance during the removal of the square pile, a car crane can be used to connect the lifting lug 7 of the top half-wrapped sleeve to assist in the removal.

[0102] Although the specific implementations of the utility model are described above, those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the attached claims. Those skilled in the art can make various changes or modifications to these implementations without departing from the principle and essence of the utility model, but these changes and modifications fall within the protection scope of the utility model.

Claims

1. A pile puller for an engineering pile, characterized in that: The engineering pile comprises a pile body and a pile tip, and the pile puller comprises a side plate for surrounding the side of the engineering pile, at least two bottom plates, a resetting device and a locking device, and the two bottom plates are connected to the bottoms of two opposite sides of the side plates; The bottom plate comprises a rotating end and a movable end away from the rotating end, the bottom plate is rotatably connected to the side plate at the rotating end, and the reset device is connected to the movable end and the bottom end of the side plate; When the side plate is sunk in the height direction of the engineering pile and gradually surrounds the engineering pile, the two bottom plates are pushed open by the pile tip, and the movable end rotates around the rotating end from the bottom surface of the side plate to the inner wall of the side plate and is retracted to the inner wall; when the movable end moves to the pile tip, the resetting device is used to drive the movable end to rotate from the inner wall to the bottom surface of the side plate, and the two bottom plates are flattened along the bottom surface of the side plate and connected to form a flat plate; The locking device is connected to the bottom plate or the side plate at the rotating end, and when the movable end is rotated to the bottom surface of the side plate, the locking device is used to lock the rotation of the bottom plate so that the bottom plate remains on the bottom surface of the side plate.

2. The pile puller for engineering piles according to claim 1, characterized in that: The side panel comprises a first half-wrapped side panel and at least one second half-wrapped side panel, wherein at least one second half-wrapped side panel is connected to the first half-wrapped side panel at the bottom of the first half-wrapped side panel along the height direction to form an inner cavity for accommodating the engineering piles; The height of the first half-wrapped side plate is not less than the length of the engineering pile, and the height of the second half-wrapped side plate is not less than the width of the bottom plate.

3. The pile puller for engineering piles as claimed in claim 2, characterized in that: The side panel includes at least two second half-wrapped side panels, and the two second half-wrapped side panels are respectively connected to the first half-wrapped side panel at the bottom and the top of the first half-wrapped side panel along the height direction.

4. The pile puller for engineering piles according to claim 1, characterized in that: At least two lifting ears are arranged at the top of the side plate in the height direction, and the two lifting ears are arranged on two opposite sides of the side plate.

5. The engineering pile puller according to claim 1, characterized in that: The resetting device comprises a plurality of elastic members, one end of each of the elastic members is connected to the movable end, and the other end of each of the elastic members is connected to the bottom end of the side plate.

6. The pile puller for engineering piles as claimed in claim 5, characterized in that: The two bottom plates are provided with the elastic members on both sides along the width direction. And / or, when the bottom plate is rotated to be flattened along the bottom surface, the elastic member is parallel to the width direction.

7. The pile puller for engineering piles as claimed in claim 5, characterized in that: The reset device also includes a plurality of connecting plates of the elastic member, through which the elastic member is connected to the bottom plate and the side plate; the connecting plates are arranged on the opposite sides of the side plate and the bottom plate when they are flattened, and the connecting plates arranged on the bottom plate match the shape of the inner walls of the side plates.

8. The engineering pile puller according to claim 1, characterized in that: The pile puller further comprises a rotating connection member, the rotating connection member comprises a rotating part, two fixed parts and an axle pin, two ends of the rotating part are rotatably connected to the fixed part through the axle pin, the fixed part is connected to the side plate, and the rotating part is connected to the bottom plate; The rotating part is also connected to the locking device, and the locking device includes an abutment part. When the movable end rotates to the bottom surface of the side plate, the abutment part abuts against the outer wall of the side plate to keep the bottom plate on the bottom surface of the side plate.

9. The engineering pile puller according to claim 8, characterized in that: The cross-sectional profile of the fixing portion is an inverted water drop shape, and the cross-sectional profile of the fixing portion includes a sharp corner. When the movable end rotates to the inner wall, the sharp corner is arranged along the soil penetration direction.

10. The engineering pile puller according to claim 8, characterized in that: The locking device is a triangular moment-resisting member, the abutting portion is a first side surface of the moment-resisting member connected to the rotating portion, and the moment-resisting member further includes a vertex angle opposite to the first side surface and away from the rotating portion; When the movable end rotates to the inner wall, the top angle is arranged along the soil burying direction; when the movable end rotates to the bottom surface of the side plate, the first side surface abuts against the outer wall of the side plate.

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