A pile hammer pile cap and its diameter adaptation adjustment method

Abstract

The present invention discloses a method for adjusting the diameter of a pile cap of a pile driver, which includes the following steps: determining the pile diameter size, adjusting the inner diameter of a lower pile cap, installing the pile cap of the pile driver, and installing a cement pile. The method for adjusting the diameter of the pile cap of the pile driver realizes the adjustment of the inner diameter of the lower pile cap by movably adjusting the radial distance between each adjusting block and the central axis of the pile cap, thereby realizing the construction of cement prefabricated piles adapted to different diameters. At the same time, a pile head buffer and a pile head pad are arranged at the bottom of the inner cavity of the lower pile cap to prevent the pile head from being damaged, which can effectively reduce the problems existing in the existing cement pile cap, is simple to operate, has low maintenance costs, and improves the safety of pile foundation construction. The present invention also discloses a pile cap of a pile driver implementing the method, which realizes the adjustment of the inner diameter of the lower pile cap by radially movably adjusting each adjusting block and each adjusting support frame circumferentially arranged on the outer side of the lower cylinder, and the pile diameter adjustment is safe and fast, and is adaptable to a wide range of pile types and has high construction efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of pile foundation construction equipment, and in particular to a pile cap of a pile driving hammer and a diameter adaptation and adjustment method thereof. Background Art

[0002] In the existing cement precast pile construction in pile foundation construction, different specifications of cement precast piles need to be matched with corresponding pile hammer caps during the operation of the pile driver. However, the pile hammer caps are expensive to manufacture and cumbersome to replace, which affects the construction efficiency. In addition, the replacement process requires the operator to operate directly below the pile hammer, which poses a high risk.

[0003] In the prior art, our company has previously researched and disclosed a hydraulic pile hammer with an improved structure [application number: CN03274785.3]. The pile cap of the pile hammer is composed of an integral structure. For the construction of cement precast piles of different specifications, only the corresponding pile cap of the pile hammer can be replaced. In addition, the inner cavity of the pile cap of the pile hammer is not provided with a pile head buffer. Therefore, during the construction process, cardboard or wood board needs to be placed between the pile head and the pile cap anvil as a buffer to prevent the pile head from being damaged. The cardboard or wood board needs to be matched according to the size of the pile, and the replacement is frequent, the installation is cumbersome, and it is easy to be damaged. During installation, it is necessary to operate directly below the pile hammer, which has a high risk.

[0004] Therefore, there is an urgent need to develop a pile hammer pile cap and a diameter adaptation adjustment method thereof to adapt to the construction of cement precast piles of different diameters. Summary of the invention

[0005] The purpose of the present invention is to provide a pile cap of a pile driver and a diameter adaptation and adjustment method thereof in view of the above-mentioned deficiencies. The diameter adaptation and adjustment method of the pile cap of the pile driver can adjust the inner diameter of the lower pile cap by movably adjusting the radial distance between each adjusting block and the central axis of the pile cap, thereby realizing the construction of cement precast piles adapted to different diameters. At the same time, a pile head buffer and a pile head pad are arranged at the bottom of the inner cavity of the lower pile cap to prevent the pile head from being damaged, which can effectively reduce the problems existing in the existing cement pile cap, is simple to operate, has low maintenance cost, and improves the safety of pile foundation construction. The pile cap of the pile driver can adjust the inner diameter of the lower pile cap through radially movable adjustment of each adjusting block and each adjusting support frame circumferentially arranged on the outer side surface of the lower cylinder. The pile diameter adjustment is safe and fast, and is adaptable to a wide range of pile types, greatly reduces the cost, and improves the construction efficiency.

[0006] The technical solution is as follows:

[0007] A method for adjusting the diameter of a pile cap of a pile driving hammer comprises the following steps:

[0008] (1) Determine the pile diameter and the pile head diameter of the precast cement pile to be constructed;

[0009] (2) adjusting the inner diameter of the lower pile cap, radially moving the adjusting blocks of the pile cap of the pile driver, adjusting the radial distance between the pile clamps of each adjusting block and the central axis of the pile cap, so that the inner diameter of the lower pile cap formed by each of the pile clamps is adapted to the diameter of the pile head, and the adjusting positioning members of each of the adjusting blocks are pinned and connected with each of the adjusting support frames by means of adjusting pins; wherein the pile cap of the pile driver comprises an upper pile cap, a lower cylinder, a pile head buffer, a pile head pad, a plurality of adjusting blocks, a plurality of adjusting support frames, and a plurality of adjusting pins, the upper end of the lower cylinder is connected to the lower end surface of the upper pile cap to form a lower cavity, the pile head buffer and the pile head pad are sequentially installed on the cavity bottom of the lower cavity from top to bottom, and the adjusting block comprises a pile clamp and an adjusting positioning member;

[0010] (3) Installation of a pile cap of a pile driving hammer, wherein the pile cap of the pile driving hammer is installed at the lower end of the pile driving hammer core of the pile driving hammer through the upper pile cap, wherein the pile driving hammer comprises a pile driving hammer core and a pile cap of the pile driving hammer;

[0011] (4) Installation of cement piles: installing the pile head of the cement precast pile to be constructed in the inner cavity of the lower pile cap so that the top of the pile head of the cement precast pile to be constructed abuts against the lower end surface of the pile head pad, thereby completing the installation of the cement precast pile to be constructed.

[0012] The adjustment support frame includes a first adjustment support plate and a second adjustment support plate, the first adjustment support plate and the second adjustment support plate are respectively installed on both sides of the vertical strip hole, the first adjustment support plate and the second adjustment support plate are respectively provided with a plurality of first limit pin holes and a second limit pin holes, the plurality of first limit pin holes and the second limit pin holes are respectively arranged vertically, the adjustment positioning member is provided with a plurality of groups of positioning adjustment pin holes, each group of the positioning adjustment pin holes includes a plurality of positioning pin holes, the plurality of positioning pin holes are arranged vertically, and the step (2) further includes the following steps:

[0013] Each of the adjustment pin shafts passes through the first limit pin hole, the positioning pin hole, and the second limit pin hole in sequence, and the adjustment positioning piece of each of the adjustment blocks is pinned to the first adjustment support plate and the second adjustment support plate.

[0014] The top end of the pile driver body is connected with the lower end surface of the pile cap to form a lower cavity, and the pile head buffer part and the pile head gasket are installed on the cavity bottom of the lower cavity in sequence from top to bottom. The side wall of the lower cylinder body is evenly provided with a plurality of vertical strip holes in the circumference of the lower cylinder body, and each of the adjusting support frames is respectively installed on the outer surface of each of the vertical strip holes. The adjusting block comprises a pile clamp and an adjusting positioning member, one end of each of the adjusting positioning members is connected with each of the pile clamps, and the other end of each of the adjusting positioning members passes through each of the vertical strip holes from the lower cavity and is movably connected with each of the adjusting support frames through the adjusting pin shaft. The inner side surface of each of the pile clamps and the lower end surface of the pile head gasket form a lower pile cap.

[0015] The upper pile cap includes an upper cylinder, a pile cap anvil, a hammer pad, an outer buffer pad, and an annular top plate. The pile cap anvil is installed in the upper cylinder. The upper pile cap is connected to the lower cylinder through the lower end surface of the pile cap anvil. The upper end surface of the pile cap anvil is provided with a first buffer cavity and a second buffer cavity. The first buffer cavity is circular, and the second buffer cavity surrounds the first buffer cavity. The hammer pad and the outer buffer pad are respectively installed in the first buffer cavity and the second buffer cavity. The annular top plate is encapsulated in the top surface of the second buffer cavity and is connected to the upper end of the upper cylinder.

[0016] The upper pile cap also includes an annular limiting plate and a plurality of reinforcing ribs. The upper end surface of the annular limiting plate is connected to the lower end of the upper cylinder. The side surfaces of the plurality of reinforcing ribs are circumferentially connected to the outer side surface of the upper cylinder. The upper and lower ends of the reinforcing ribs are respectively connected to the annular top plate and the annular limiting plate.

[0017] The adjustment support frame includes a first adjustment support plate and a second adjustment support plate, the first adjustment support plate and the second adjustment support plate are respectively installed on both sides of the vertical strip hole, the first adjustment support plate and the second adjustment support plate are respectively provided with a plurality of first limit pin holes and a second limit pin holes, the plurality of first limit pin holes and the second limit pin holes are arranged vertically, the adjustment positioning member is provided with a plurality of groups of positioning and adjustment pin holes, each group of the positioning and adjustment pin holes gradually radially away from the vertical center axis of the pile cap from the inside to the outside, each group of the positioning and adjustment pin holes includes a plurality of positioning pin holes, the plurality of positioning pin holes are arranged vertically, and the positioning and adjustment pin holes of each of the adjustment positioning members are matched and movably connected with each of the first limit pin holes and the second limit pin holes through the adjustment pin shaft.

[0018] There are four first limit pin holes and four second limit pin holes respectively, and each group of the positioning adjustment pin holes has two positioning pin holes. The two adjacent positioning adjustment pin holes are staggered in the vertical position, and each group of the positioning adjustment pin holes of each adjustment positioning member is movably connected to match the two first limit pin holes and the second limit pin holes through two positioning pin holes.

[0019] The lower end of each of the pile clips is bent and extended outward to form a trumpet-shaped lower pile cap opening.

[0020] It also includes a plurality of pad limit screws, and the four sides of the pile head pad are circumferentially connected to the side wall of the lower cylinder through the plurality of pad limit screws.

[0021] It also includes a pad connecting piece, and the pile head buffer is connected to the pile head pad through the pad connecting piece.

[0022] It should be noted that:

[0023] The aforementioned “first, second…” do not represent specific quantity and order, but are only used to distinguish the names.

[0024] In the description of the present invention, it should be understood that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the products of the present invention are conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. These are merely for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0025] The direction indicated by the aforementioned “inside” refers to the direction toward the vertical center axis of the pile cap of the pile driver.

[0026] The direction indicated by the aforementioned “outside” refers to the direction away from the vertical center axis of the pile cap of the pile driver.

[0027] The aforementioned “horizontal direction” is based on the horizontal direction shown in the drawings, and the aforementioned “vertical direction” is based on the vertical direction shown in the drawings.

[0028] The advantages or principles of the present invention are described below:

[0029] 1. The diameter adaptation and adjustment method of the pile cap of the pile driver provided by the present invention first determines the pile head diameter of the cement precast pile to be constructed, then radially moves each adjustment block, adjusts the radial distance between the pile clamping piece of each adjustment block and the central axis of the pile cap, so that the inner cavity diameter of the lower pile cap formed by each pile clamping piece is adapted to the pile head diameter, and uses an adjustment pin to pin and connect the adjustment positioning piece of each adjustment block with each adjustment support frame to achieve the adjustment of the inner cavity diameter of the lower pile cap, thereby achieving the construction of cement precast piles with different diameter specifications, and the pile diameter adjustment is safe and fast, which greatly reduces the cost and improves the construction efficiency. High; then install the pile cap of the pile driving hammer with the adjusted inner cavity diameter of the lower pile cap at the lower end of the pile driving hammer core, and then install the pile head of the cement precast pile to be constructed into the inner cavity of the lower pile cap, so that the top of the pile head of the cement precast pile to be constructed is abutted against the lower end surface of the pile head pad, and the installation of the cement precast pile to be constructed is completed, and the pile head pad at the lower end of the pile head buffer is abutted against the top of the pile head of the cement precast pile to be constructed, so as to provide a buffer between the pile head and the pile cap anvil of the upper pile cap to prevent the pile head from being damaged, which can effectively reduce the problems existing in the existing cement pile cap, is simple to operate, has low maintenance cost, and improves the safety of pile foundation construction.

[0030] 2. The present invention is provided with multiple groups of positioning and adjusting pin holes on the adjusting positioning member. When in use, the radial distance between the pile clamps of each adjusting block and the central axis of the pile cap is adjusted by adjusting the distance between the multiple groups of positioning and adjusting pin holes and the central axis of the pile cap, thereby realizing the adaptation to the construction of cement precast piles with different diameters. The adjusting support frame of the present invention includes a first adjusting support plate and a second adjusting support plate. The first adjusting support plate and the second adjusting support plate are respectively provided with multiple first limit pin holes and second limit pin holes. Each group of positioning and adjusting pin holes includes multiple positioning pin holes. When in use, the adjusting pin shaft passes through the positioning pin hole, and the two ends of the adjusting pin shaft are respectively connected to the first limit pin hole and the second limit pin hole, so that the limiting support of the adjusting pin shaft adjusting positioning member is more stable and the operation is simple.

[0031] 3. A pile cap of a pile driver provided by the present invention comprises an upper pile cap, a lower cylinder, a pile head buffer, a pile head pad, a plurality of adjustment blocks, a plurality of adjustment support frames, and a plurality of adjustment pins. When in use, the diameter of the pile head of the cement precast pile to be constructed is first determined, and then each adjustment block is radially moved. Since the adjustment positioning pieces of each adjustment block pass through the vertical strip holes circumferentially arranged on the side wall of the lower cylinder from the lower cavity, each adjustment positioning piece moves radially in each vertical strip hole to adjust the radial distance between the pile clamping piece of each adjustment block and the central axis of the pile cap, so that the inner cavity diameter of the lower pile cap formed by each pile clamping piece is adapted to the pile head diameter, and the adjustment positioning pieces of each adjustment block are pinned and connected with each adjustment support frame by an adjustment pin to adjust the inner cavity diameter of the lower pile cap, thereby adapting to different diameter specifications. In the construction of cement precast piles, the pile diameter can be adjusted safely and quickly, the cost is greatly reduced, and the construction efficiency is improved; then the pile hammer cap with the adjusted inner cavity diameter of the lower pile cap is installed at the lower end of the pile hammer core, and then the pile head of the cement precast pile to be constructed is installed in the inner cavity of the lower pile cap, so that the top of the pile head of the cement precast pile to be constructed is against the lower end surface of the pile head pad, and the installation of the cement precast pile to be constructed is completed, because the pile head buffer and the pile head pad are installed in sequence from top to bottom at the bottom end of the inner cavity of the lower pile cap, so that the pile head buffer and the pile head pad are padded at the top of the pile head of the cement precast pile to be constructed, providing a buffer between the pile head and the pile cap anvil of the upper pile cap to prevent the pile head from being damaged, which can effectively reduce the problems existing in the existing cement pile cap, is simple to operate, has low maintenance cost, and improves the safety of pile foundation construction.

[0032] 4. The upper pile cap of the present invention comprises an upper cylinder, a pile cap anvil, a hammer pad, an outer buffer pad, and an annular top plate. The first buffer cavity on the upper end face of the pile cap anvil is circular. When in use, it is convenient for the lower end of the pile hammer to enter the circular first buffer cavity, and precise positioning can be achieved. A hammer pad is arranged above the pile cap anvil. The striking energy of the pile hammer core is buffered by the hammer pad, which can play a buffering role and extend the service life of the pile cap. The arrangement of the annular top plate facilitates the installation of the pile cap of the pile driving hammer.

[0033] 5. The upper pile cap of the present invention further comprises an annular limiting plate and a plurality of reinforcing ribs. The provision of the reinforcing ribs can enhance the rigidity of the upper pile cap and extend the service life of the upper pile cap.

[0034] 6. The adjustment support frame of the present invention includes a first adjustment support plate and a second adjustment support plate. The arrangement of the two adjustment support plates facilitates the support and adjustment of the adjustment block and the adjustment positioning member. A plurality of groups of positioning adjustment pin holes are provided on the adjustment positioning member. Each group of positioning adjustment pin holes gradually moves radially away from the vertical center axis of the pile cap from the inside to the outside, so as to adjust the radial distance between the pile clamp of each adjustment block and the vertical center axis of the pile cap, so that the inner cavity diameter of the lower pile cap formed by each pile clamp is adapted to the pile head diameter. The positioning adjustment pin hole includes a plurality of positioning pin holes, so that the pinned connection between the adjustment positioning member and the adjustment support frame is more stable.

[0035] 7. Preferably, the first limit pin holes and the second limit pin holes of the present invention are four respectively, and each group of positioning and adjusting pin holes has two positioning pin holes. The two adjacent positioning and adjusting pin holes are staggered in the vertical position, so that more radial adjustment distances can be achieved under the same adjustment length of the positioning piece and the same pin hole size, so that the pile cap of the pile driver can be adapted to the construction of more cement precast piles with different diameters and specifications, saving costs.

[0036] 8. The lower end of each pile clip of the present invention is bent and extended outward to form a trumpet-shaped lower pile cap opening, which allows the pile head of the precast cement pile to be constructed to enter the inner cavity of the lower pile cap more conveniently, thereby facilitating the installation of the pile head.

[0037] 9. The pile head pad of the present invention is circumferentially connected to the side wall of the lower cylinder through a plurality of pad limit screws, so that the replacement and installation of the pile head pad are convenient.

[0038] 10. The pile head buffer of the present invention is connected to the pile head pad through a pad connector, so that the buffer connection between the pile head buffer and the pile head pad is more stable.

[0039] 11. The provision of the lifting lugs of the present invention facilitates the lifting and transportation lashing of the pile cap of the pile driver to prevent it from falling during transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a schematic diagram of the overall three-dimensional appearance structure of a pile cap of a pile driving hammer according to an embodiment of the present invention.

[0041] Figure 2 It is a side view of a pile cap of a pile driving hammer according to an embodiment of the present invention.

[0042] Figure 3 sectional view of a pile cap of a pile driving hammer according to an embodiment of the present invention Figure 1 .

[0043] Figure 4 sectional view of a pile cap of a pile driving hammer according to an embodiment of the present invention Figure 2 .

[0044] Description of reference numerals:

[0045] 10. Upper pile cap, 11. Upper cylinder, 12. Pile cap anvil, 121. First buffer cavity, 13. Hammer pad, 14. Outer buffer pad, 15. Annular top plate, 16. Annular limit plate, 17. Strengthening rib, 20. Lower cylinder, 21. Vertical strip hole, 30. Pile head buffer, 40. Pile head pad, 50. Adjustment block, 51. Pile clip, 52. Adjustment positioning member, 521. Positioning pin hole, 60. Adjustment support frame, 61. First adjustment support plate, 611. First limit pin hole, 62. Second adjustment support plate, 621. Second limit pin hole, 70. Adjustment pin shaft, 81. Pad limit screw, 82. Pad connector, 83. Lifting ear, 831. Lifting hole, 90. Precast cement pile. DETAILED DESCRIPTION

[0046] The embodiments of the present invention are described in detail below.

[0047] See also Figures 1 to 4 The diameter adaptation adjustment method of the pile cap of the pile driving hammer provided by the present invention comprises the following steps:

[0048] (1) Determine the pile diameter size and the pile head diameter of the precast cement pile 90 to be constructed;

[0049] (2) Adjust the inner diameter of the lower pile cap, radially move the adjusting blocks 50 of the pile driving hammer pile cap, adjust the radial distance between the pile clamping pieces 51 of each adjusting block 50 and the central axis of the pile cap, so that the inner diameter of the lower pile cap formed by each pile clamping piece 51 is adapted to the diameter of the pile head, and use the adjusting pin 70 to pin the adjusting positioning piece 52 of each adjusting block 50 to each adjusting support frame 60; wherein, the pile driving hammer pile cap comprises an upper pile cap 10, a lower cylinder 20, a pile head buffer 30, a pile head pad 40, a plurality of adjusting blocks 50, a plurality of adjusting support frames 60, and a plurality of adjusting pins 70, wherein the upper end of the lower cylinder 20 is connected to the lower end surface of the upper pile cap 10 to form a lower cavity, the pile head buffer 30 and the pile head pad 40 are sequentially installed on the cavity bottom of the lower cavity from top to bottom, and the adjusting block 50 comprises a pile clamping piece 51 and an adjusting positioning piece 52;

[0050] (3) Installation of a pile cap of a pile driving hammer. The pile cap of the pile driving hammer is installed at the lower end of the pile driving hammer core of the pile driving hammer through an upper pile cap 10, wherein the pile driving hammer includes a pile driving hammer core and a pile cap of the pile driving hammer;

[0051] (4) Installation of cement piles: Install the pile head of the cement precast pile 90 to be constructed in the inner cavity of the lower pile cap so that the top of the pile head of the cement precast pile 90 to be constructed abuts against the lower end surface of the pile head pad 40, thereby completing the installation of the cement precast pile 90 to be constructed.

[0052] The method first determines the pile head diameter of the cement precast pile 90 to be constructed, then radially moves each adjustment block 50, adjusts the radial distance between the pile clip 51 of each adjustment block 50 and the pile cap centerline, so that the inner cavity diameter of the lower pile cap formed by each pile clip 51 is adapted to the pile head diameter, and uses the adjustment pin 70 to pin the adjustment positioning piece 52 of each adjustment block 50 to each adjustment support frame 60 to achieve the adjustment of the inner cavity diameter of the lower pile cap, thereby achieving the construction of cement precast piles 90 with different diameter specifications, and the pile diameter adjustment is safe and fast, which greatly reduces the cost and improves the construction efficiency; then the adjusted pile is lowered The pile cap of the pile driving hammer with a cap inner cavity diameter is installed at the lower end of the pile driving hammer core, and then the pile head of the cement precast pile 90 to be constructed is installed in the inner cavity of the lower pile cap, so that the top of the pile head of the cement precast pile 90 to be constructed is abutted against the lower end surface of the pile head pad 40, and the installation of the cement precast pile 90 to be constructed is completed. The pile head pad 40 at the lower end of the pile head buffer 30 is abutted against the top of the pile head of the cement precast pile 90 to be constructed, providing a buffer between the pile head and the pile cap anvil 12 of the upper pile cap 10 to prevent the pile head from being damaged, which can effectively reduce the problems existing in the existing cement pile cap, is simple to operate, has low maintenance cost, and improves the safety of pile foundation construction.

[0053] The adjustment support frame 60 includes a first adjustment support plate 61 and a second adjustment support plate 62, which are respectively installed on both sides of the vertical strip hole 21. The first adjustment support plate 61 and the second adjustment support plate 62 are respectively provided with a plurality of first limit pin holes 611 and a second limit pin holes 621, which are respectively arranged vertically. The adjustment positioning member 52 is provided with a plurality of groups of positioning adjustment pin holes, each group of positioning adjustment pin holes includes a plurality of positioning pin holes 521, and the plurality of positioning pin holes 521 are arranged vertically. Step (2) also includes the following steps:

[0054] Each adjusting pin shaft 70 passes through the first limiting pin hole 611 , the positioning pin hole 521 , and the second limiting pin hole 621 in sequence, and the adjusting positioning member 52 of each adjusting block 50 is pinned and connected with each first adjusting support plate 61 and the second adjusting support plate 62 .

[0055] During operation, by adjusting the distance between multiple groups of positioning adjustment pin holes and the central axis of the pile cap, the radial distance between the pile clip 51 of each adjustment block 50 and the central axis of the pile cap can be adjusted, thereby realizing the construction of cement precast piles 90 adapted to different diameters. The adjustment support frame 60 of the present invention includes a first adjustment support plate 61 and a second adjustment support plate 62. A plurality of first limit pin holes 611 and a second limit pin holes 621 are respectively provided on the first adjustment support plate 61 and the second adjustment support plate 62. Each group of positioning adjustment pin holes includes a plurality of positioning pin holes 521. When in use, the adjusting pin shaft 70 passes through the positioning pin hole 521, and the two ends of the adjusting pin shaft 70 are respectively connected to the first limit pin hole 611 and the second limit pin hole 621, so that the limiting support of the adjusting pin shaft 70 to adjust the positioning member 52 is more stable and easy to operate.

[0056] like Figures 1 to 4 As shown, the pile cap of the pile driving hammer for implementing the above method provided by the present invention comprises an upper pile cap 10, a lower cylinder 20, a pile head buffer 30, a pile head pad 40, a plurality of adjustment blocks 50, a plurality of adjustment support frames 60, and a plurality of adjustment pins 70. The upper end of the lower cylinder 20 is connected to the lower end surface of the upper pile cap 10 to form a lower cavity. The pile head buffer 30 and the pile head pad 40 are sequentially installed on the bottom of the lower cavity from top to bottom. The side wall of the lower cylinder 20 is evenly provided with a plurality of vertical Each adjusting support frame 60 is respectively installed on the outer side of each vertical strip hole 21, and the adjusting block 50 includes a pile clamp 51 and an adjusting positioning member 52. One end of each adjusting positioning member 52 is connected to each pile clamp 51, and the other end of each adjusting positioning member 52 passes through each vertical strip hole 21 from the lower cavity, and is movably connected to each adjusting support frame 60 through an adjusting pin 70. The inner side surface of each pile clamp 51 and the lower end surface of the pile head pad 40 form a lower pile cap.

[0057] When in use, first determine the pile head diameter of the cement precast pile 90 to be constructed, and then move each adjusting block 50 radially. Since the adjusting positioning pieces 52 of each adjusting block 50 pass through the vertical strip holes 21 circumferentially arranged on the side wall of the lower cylinder 20 from the lower cavity, each adjusting positioning piece 52 moves radially in each vertical strip hole 21 to adjust the radial distance between the pile clamping piece 51 of each adjusting block 50 and the central axis of the pile cap, so that the inner cavity diameter of the lower pile cap formed by each pile clamping piece 51 is adapted to the pile head diameter, and the adjusting positioning pieces 52 of each adjusting block 50 are pinned and connected with each adjusting support frame 60 by an adjusting pin shaft 70 to adjust the inner cavity diameter of the lower pile cap, thereby realizing the construction of cement precast piles 90 adapted to different diameter specifications, and the pile diameter adjustment is safe and fast, which greatly reduces the cost. , and the construction efficiency is improved; then the pile driving hammer pile cap with adjusted inner cavity diameter of the lower pile cap is installed at the lower end of the pile driving hammer core, and then the pile head of the cement precast pile 90 to be constructed is installed in the inner cavity of the lower pile cap, so that the top of the pile head of the cement precast pile 90 to be constructed is against the lower end surface of the pile head pad 40, and the installation of the cement precast pile 90 to be constructed is completed. The pile head buffer 30 and the pile head pad 40 are installed in sequence from top to bottom at the bottom end of the inner cavity of the lower pile cap, so that the pile head buffer 30 and the pile head pad 40 are cushioned at the top of the pile head of the cement precast pile 90 to be constructed, providing a buffer between the pile head and the pile cap anvil 12 of the upper pile cap 10 to prevent the pile head from being damaged, which can effectively reduce the problems existing in the existing cement pile cap, is simple to operate, has low maintenance cost, and improves the safety of pile foundation construction.

[0058] Among them, the upper pile cap 10 includes an upper cylinder 11, a pile cap anvil 12, a hammer pad 13, an outer buffer pad 14, an annular top plate 15, an annular limit plate 16, and multiple reinforcing ribs 17. The pile cap anvil 12 is installed in the upper cylinder 11, and the upper pile cap 10 is connected to the lower cylinder 20 through the lower end face of the pile cap anvil 12. The upper end face of the pile cap anvil 12 is provided with a first buffer cavity 121 and a second buffer cavity. The first buffer cavity 121 is circular, and the second buffer cavity surrounds the first buffer cavity 121. The hammer pad 13 and the outer buffer pad 14 are respectively installed in the first buffer cavity 121 and the second buffer cavity. The annular top plate 15 is encapsulated on the top surface of the second buffer cavity and is connected to the upper end of the upper cylinder. The first buffer cavity 121 on the upper end surface of the pile cap anvil 12 is circular. When in use, it is convenient for the lower end of the pile hammer to enter the circular first buffer cavity 121, and accurate positioning can be achieved. A hammer pad 13 is arranged above the pile cap anvil 12. The striking energy of the pile hammer core is buffered by the hammer pad 13, which can play a buffering role and extend the service life of the pile cap. The setting of the annular top plate 15 facilitates the installation of the pile cap of the pile hammer.

[0059] The upper end surface of the annular stop plate 16 is connected to the lower end of the upper cylinder 11, the side surfaces of the plurality of reinforcing ribs 17 are circumferentially connected to the outer side surface of the upper cylinder 11, and the upper and lower ends of the reinforcing ribs 17 are respectively connected to the annular top plate 15 and the annular stop plate 16. The provision of the reinforcing ribs 17 can enhance the rigidity of the upper pile cap 10 and extend the service life of the upper pile cap 10.

[0060] The adjustment support frame 60 includes a first adjustment support plate 61 and a second adjustment support plate 62, which are respectively installed on both sides of the vertical strip hole 21, and the first adjustment support plate 61 and the second adjustment support plate 62 are respectively provided with a plurality of first limit pin holes 611 and a second limit pin holes 621, and the plurality of first limit pin holes 611 and the second limit pin holes 621 are arranged vertically. The adjustment positioning member 52 is provided with a plurality of groups of positioning and adjusting pin holes, and each group of positioning and adjusting pin holes gradually radially moves away from the vertical center axis of the pile cap from the inside to the outside, and each group of positioning and adjusting pin holes includes a plurality of positioning pin holes 521, and the plurality of positioning pin holes 521 are arranged vertically. The positioning and adjusting pin holes of each adjustment positioning member 52 are matched and movably connected with each first limit pin hole 611 and the second limit pin hole 621 through an adjusting pin shaft 70. The arrangement of two adjustment support plates facilitates the support and adjustment of the adjustment block 50 and the adjustment positioning member 52; a plurality of groups of positioning adjustment pin holes are provided on the adjustment positioning member 52, and each group of positioning adjustment pin holes gradually moves radially away from the vertical center axis of the pile cap from the inside to the outside, so as to adjust the radial distance between the pile clamping piece 51 of each adjustment block 50 and the vertical center axis of the pile cap, so that the inner cavity diameter of the lower pile cap formed by each pile clamping piece 51 is adapted to the pile head diameter, and the positioning adjustment pin holes include a plurality of positioning pin holes 521, so that the pinned connection between the adjustment positioning member 52 and the adjustment support frame 60 is more stable.

[0061] Preferably, there are four first limit pin holes 611 and four second limit pin holes 621, and each group of positioning adjustment pin holes has two positioning pin holes 521. Two adjacent positioning adjustment pin holes are staggered in vertical position, and each group of positioning adjustment pin holes of each adjustment positioning member 52 is matched and movably connected with two first limit pin holes 611 and two second limit pin holes 621 through two positioning pin holes 521. Two adjacent positioning adjustment pin holes are staggered in vertical position, so that more radial adjustment distances can be achieved under the same adjustment of the positioning member 52 adjustment length and the same pin hole size, so that the pile cap of the pile hammer can be adapted to the construction of more cement precast piles 90 with different diameters and specifications, saving costs.

[0062] The lower end of each pile clip 51 is bent and extended outward to form a trumpet-shaped lower pile cap opening, so that the pile head of the cement prefabricated pile 90 to be constructed can enter the inner cavity of the lower pile cap more conveniently, thereby facilitating the installation of the pile head.

[0063] The pile cap of the pile driving hammer further comprises a plurality of pad limit screws 81 and pad connectors 82. The four sides of the pile head pad 40 are circumferentially connected to the side wall of the lower cylinder 20 through the plurality of pad limit screws 81, so that the replacement and installation of the pile head pad 40 are convenient.

[0064] The pile head buffer 30 is connected to the pile head pad 40 through the pad connector 82, so that the buffer connection between the pile head buffer 30 and the pile head pad 40 is more stable.

[0065] A plurality of lifting ears 83 are circumferentially arranged on the upper edge of the outer surface of the lower cylinder 20, and a lifting hole 831 is arranged on the lifting ear 83. The arrangement of the lifting ear 83 enables the pile cap of the pile driving hammer to be hoisted and transported and tied to avoid falling during transportation.

[0066] The above are only specific embodiments of the present invention, and the protection scope of the present invention is not limited thereto; any replacement and improvement made on the basis of not violating the concept of the present invention shall fall within the protection scope of the present invention.

Claims

1. A method for adjusting the diameter of a pile cap of a pile driving hammer, characterized in that: The pile cap of the pile driving hammer comprises an upper pile cap, a lower cylinder, a pile head buffer, a pile head pad, a plurality of adjustment blocks, a plurality of adjustment support frames, a plurality of adjustment pins, and a plurality of pad limit screws. The upper end of the lower cylinder is connected to the lower end surface of the upper pile cap to form a lower cavity. The pile head buffer and the pile head pad are sequentially installed on the cavity bottom of the lower cavity from top to bottom. The side wall of the lower cylinder is evenly provided with a plurality of vertical strip holes in the circumferential direction. Each of the adjustment support frames is respectively installed on the outer side surface of each of the vertical strip holes. The adjustment block comprises a pile clamp, an adjustment fixed pin, and a plurality of adjustment fixed pins. The adjusting member is a positioning member, one end of each adjusting positioning member is connected to each pile clamp, the other end of each adjusting positioning member passes through each vertical strip hole from the lower cavity, and is movably connected to each adjusting support frame through the adjusting pin shaft, the inner side surface of each pile clamp and the lower end surface of the pile head pad form a lower pile cap; the adjusting support frame includes a first adjusting support plate and a second adjusting support plate, the first adjusting support plate and the second adjusting support plate are respectively installed on both sides of the vertical strip hole, and the first adjusting support plate and the second adjusting support plate are respectively installed on A plurality of first limit pin holes and a plurality of second limit pin holes are provided, and the plurality of first limit pin holes and the plurality of second limit pin holes are respectively arranged vertically; a plurality of groups of positioning adjustment pin holes are provided on the adjustment positioning member, and each group of the positioning adjustment pin holes includes a plurality of positioning pin holes, and the plurality of positioning pin holes are arranged vertically; the upper pile cap includes an upper cylinder, a pile cap anvil, a hammer pad, an outer buffer pad, and an annular top plate; the pile cap anvil is installed in the upper cylinder; the upper pile cap is connected to the lower cylinder through the lower end surface of the pile cap anvil, and the upper end surface of the pile cap anvil is provided There are a first buffer cavity and a second buffer cavity, the first buffer cavity is circular, the second buffer cavity surrounds the first buffer cavity, the hammer pad and the outer buffer pad are respectively installed in the first buffer cavity and the second buffer cavity, the annular top plate is encapsulated on the top surface of the second buffer cavity, and the annular top plate is connected to the upper end of the upper cylinder; the lower end of each pile clip is bent and extended outward to form a trumpet-shaped lower pile cap opening; the pile head pad is circumferentially connected to the side wall of the lower cylinder through a plurality of pad limit screws; The diameter adaptation adjustment method includes the following steps: (1) Determine the pile head diameter of the precast cement pile to be constructed; (2) Adjust the inner diameter of the lower pile cap, radially move the adjusting blocks of the pile cap of the pile driver, adjust the radial distance between the pile clamps of each adjusting block and the central axis of the pile cap, so that the inner diameter of the lower pile cap formed by each of the pile clamps matches the diameter of the pile head, and use an adjusting pin to pin the adjusting positioning pieces of each of the adjusting blocks to each of the adjusting support frames; each of the adjusting pins passes through the first limit pin hole, the positioning pin hole, and the second limit pin hole in sequence, and pins the adjusting positioning pieces of each of the adjusting blocks to each of the first adjustment support plates and the second adjustment support plates; (3) Installation of a pile cap of a pile driving hammer, wherein the pile driving hammer comprises a pile driving hammer core and a pile cap, and the pile cap of the pile driving hammer is installed at the lower end of the pile driving hammer core of the pile driving hammer through the upper pile cap; (4) Installation of precast cement piles: installing the pile head of the precast cement pile to be constructed in the inner cavity of the lower pile cap so that the top of the pile head of the precast cement pile to be constructed abuts against the lower end surface of the pile head pad, thereby completing the installation of the precast cement pile to be constructed.

2. The diameter adaptation adjustment method of a pile cap of a pile driving hammer according to claim 1, characterized in that: The upper pile cap also includes an annular limiting plate and a plurality of reinforcing ribs. The upper end surface of the annular limiting plate is connected to the lower end of the upper cylinder. The side surfaces of the plurality of reinforcing ribs are circumferentially connected to the outer side surface of the upper cylinder. The upper and lower ends of the reinforcing ribs are respectively connected to the annular top plate and the annular limiting plate.

3. The diameter adaptation adjustment method of a pile cap of a pile driving hammer according to claim 1, characterized in that: There are four first limiting pin holes and four second limiting pin holes respectively, and each group of positioning adjustment pin holes has two positioning pin holes, and two adjacent positioning adjustment pin holes are staggered in vertical positions.

4. The diameter adaptation adjustment method of a pile cap of a pile driving hammer according to claim 1, characterized in that: It also includes a pad connecting piece, and the pile head buffer is connected to the pile head pad through the pad connecting piece.

5. A pile cap for a pile driving hammer, characterized in that: Used to implement the diameter adaptation adjustment method as described in any one of claims 1 to 4.

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