Pile cap of pile sinking hydraulic hammer

Abstract

The utility model discloses a pile cap of a pile sinking hydraulic hammer. The pile cap comprises a pile cap body, an anvil and a plurality of guide blocks. The pile cap body comprises a straight cylindrical cap cylinder, a lower flange installed at the top of the cap cylinder, a circular-truncated-cone-shaped cap top plate connected to the inner end of the lower flange and an upper flange connected to the top end of the cap top plate. The anvil is mounted in an upper inner cavity of the pile cap body; the plurality of guide blocks are circumferentially, uniformly and radially connected to the inner wall surface of the upper part of the cap cylinder; the inner end surfaces of the plurality of guide blocks are positioned on a circle of which the diameter is matched with the outer diameter of a pile foundation; the upper end face of each guide block is a horizontal plane, and the lower end face of each guide block is an inclined plane with high inside and low outside. The pile cap can meet the pile sinking requirement of a pile foundation with the outer diameter smaller than the inner diameter of the pile cap body, and the site construction requirement is met.

Description

TECHNICAL FIELD

[0001] The utility model relates to a pile cap of pile sinking hydraulic hammer. BACKGROUND

[0002] The current offshore wind power single pile foundation diameter presents the large-scale development trend, and the energy demand of hydraulic pile hammer is also more and more big.In the pile sinking process, the pile foundation can bear the energy of pile hammer beating through the pile cap, and the uniformity of the distance from the periphery of the pile cap to the periphery of the pile foundation is controlled, so that the energy of the pile hammer is distributed on the plane of the pile top to the maximum extent.If the offset of the pile hammer on the pile top is not controlled through the pile cap, the verticality of the pile foundation will exceed 3 ‰ due to uneven stress on the pile top, and then the calibration pile sinking fails.

[0003] In the traditional pile sinking process, when different pile diameters of pile foundations are encountered, different hydraulic hammers and corresponding pile caps need to be replaced, so that the corresponding pile sinking operation can be smoothly completed.The installation operation of the hydraulic hammer and the pile cap is at least one week, and at the same time, the corresponding transport ship needs to be found to transport to the designated operation area, which delays the engineering progress and reduces the work efficiency. UTILITY MODEL CONTENTS

[0004] The utility model aims at overcoming the defects of prior art and providing a pile cap of pile sinking hydraulic hammer, which can meet the pile sinking requirements of the pile foundation with the outer diameter smaller than the inner diameter of the pile cap body and satisfy the field construction.

[0005] The utility model aims at overcoming the defects of prior art and providing a pile cap of pile sinking hydraulic hammer, which can meet the pile sinking requirements of the pile foundation with the outer diameter smaller than the inner diameter of the pile cap body and satisfy the field construction.

[0006] The utility model relates to a pile cap of pile sinking hydraulic hammer, which comprises a pile cap body and an anvil, wherein the pile cap body comprises a straight cylindrical cap barrel, a lower flange installed at the top of the cap barrel, a circular truncated cone cap top plate connected to the inner end of the lower flange, and an upper flange connected to the top end of the cap top plate; the anvil is installed in the upper inner cavity of the pile cap body, and the anvil comprises a lower cylinder adapted to the shape of the inner cavity of the cap barrel, a circular truncated cone body integrally connected to the top of the cylinder and adapted to the shape of the inner cavity of the cap top plate, and an upper cylinder integrally connected to the top end of the circular truncated cone body and having a diameter smaller than the inner diameter of the upper flange; the pile cap further comprises a plurality of guide blocks.

[0007] The utility model relates to a pile cap of pile sinking hydraulic hammer, which comprises a pile cap body and an anvil, wherein the pile cap body comprises a straight cylindrical cap barrel, a lower flange installed at the top of the cap barrel, a circular truncated cone cap top plate connected to the inner end of the lower flange, and an upper flange connected to the top end of the cap top plate; the anvil is installed in the upper inner cavity of the pile cap body, and the anvil comprises a lower cylinder adapted to the shape of the inner cavity of the cap barrel, a circular truncated cone body integrally connected to the top of the cylinder and adapted to the shape of the inner cavity of the cap top plate, and an upper cylinder integrally connected to the top end of the circular truncated cone body and having a diameter smaller than the inner diameter of the upper flange; the pile cap further comprises a plurality of guide blocks.

[0008] The utility model relates to a pile cap of pile sinking hydraulic hammer, which comprises a pile cap body and an anvil, wherein the pile cap body comprises a straight cylindrical cap barrel, a lower flange installed at the top of the cap barrel, a circular truncated cone cap top plate connected to the inner end of the lower flange, and an upper flange connected to the top end of the cap top plate; the anvil is installed in the upper inner cavity of the pile cap body, and the anvil comprises a lower cylinder adapted to the shape of the inner cavity of the cap barrel, a circular truncated cone body integrally connected to the top of the cylinder and adapted to the shape of the inner cavity of the cap top plate, and an upper cylinder integrally connected to the top end of the circular truncated cone body and having a diameter smaller than the inner diameter of the upper flange; the pile cap further comprises a plurality of guide blocks.

[0009] The pile cap of the pile sinking hydraulic hammer has the following characteristics: the pile cap body can be sleeved on the pile foundation with an outer diameter smaller than the inner diameter of the cap barrel, the hammer body, the pile cap body and the hydraulic hammer are constructed on the same axis, the problem of uneven stress on the top surface of the pile foundation during pile sinking is avoided, at the same time, the same model of the hydraulic hammer head of the pile driver can be used to construct pile foundations with different diameters, the work of frequently replacing the hammer head when constructing pile foundations with different diameters in the same construction area is avoided, the on-site construction is met, the time for frequently replacing the hydraulic hammer is saved, and the pile sinking construction speed of the pile foundation is accelerated. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 is an axial sectional view of the pile cap of the pile sinking hydraulic hammer of the utility model;

[0011] Figure 2 is Figure 1 the A-A view in Fig. DETAILED DESCRIPTION

[0012] The utility model will be further described below with reference to the drawings.

[0013] Please refer to Figure 1 and Figure 2 The pile cap of the pile sinking hydraulic hammer of the utility model comprises a pile cap body 1, an anvil 2 and six guide blocks 3.

[0014] The pile cap body 1 comprises a straight cylindrical cap barrel 11, a lower flange 12 installed at the top of the cap barrel 11, a circular truncated cone cap top plate 13 connected to the inner end of the lower flange 12 and an upper flange 14 connected to the top end of the cap top plate 13.

[0015] The anvil 2 is installed in the upper inner cavity of the pile cap body 1, and the anvil 2 comprises a lower cylindrical body adapted to the shape of the inner cavity of the cap barrel 11, a circular truncated cone body integrally connected to the top of the cylindrical body and adapted to the shape of the inner cavity of the pile cap body top plate 13 and an upper cylindrical body integrally connected to the top end of the circular truncated cone body and having a diameter smaller than the inner diameter of the upper flange 14.

[0016] The six guide blocks 3 are radially connected to the upper inner wall surface of the cap barrel 11 in a circumferentially uniform manner, and the inner end surface of the six guide blocks 3 is located on a cylinder with a diameter adapted to the outer diameter of the pile foundation 4; the upper end surface of each guide block 3 is a horizontal surface, and the distance from the upper end surface of each guide block 3 to the bottom surface of the anvil 2 is L=300-400mm; the lower end surface of each guide block 3 is an inclined surface with an inner high and outer low structure; two pairs of reinforcing plates 30 are respectively connected to the inner wall surface of the cap barrel 11 above and below the two side surfaces of each guide block 3.

[0017] The pile cap of the pile sinking hydraulic hammer is improved, that is, six trapezoidal guide blocks 3 are added to the inner wall surface of the cap barrel 11 of the pile cap body 1. In addition, in order to prevent the guide blocks 3 from contacting the lifting lugs 5 fixed on the upper outer surface of the pile foundation 4 during the pile sinking of the pile foundation, the hammering force of the hydraulic hammer cannot fully act on the top surface of the pile foundation 4, therefore, an inner-high and outer-low inclined surface is cut on the bottom surface of each guide block 3, so that the guide blocks 3 can avoid the pair of lifting lugs 5 fixed on the upper outer surface of the pile foundation 4. In order to avoid the damage of the guide blocks 3 to the anvil 2 during the welding and cutting operation of the guide blocks 3 and the pile cap 1, the guide blocks 3 are arranged at a position 300-400 mm away from the bottom surface of the anvil 2, and the guide blocks 3 can also ensure that the anvil 2 avoids the applied force to the guide blocks 3 during the falling process of the anvil 2 when the hydraulic hammer strikes the anvil 2.

[0018] The pile cap of the pile sinking hydraulic hammer solves the problem that the pile foundation, the pile cap body and the hydraulic hammer are constructed on the same axis, and avoids the uneven stress problem of the top surface of the pile foundation during the pile sinking.

[0019] The above embodiments are only used for illustrating the utility model, and are not limited to the utility model. Those skilled in the art can make various changes or modifications without departing from the spirit and scope of the utility model, therefore, all equivalent technical solutions should belong to the scope of the utility model, and should be limited by the claims.

Claims

1. A pile cap for a hydraulic hammer used for pile driving, comprising a pile cap body and an anvil; the pile cap body includes a straight cylindrical cap cylinder, a lower flange mounted on the top of the cap cylinder, a frustum-shaped cap top plate connected to the inner end of the lower flange, and an upper flange connected to the top of the cap top plate; the anvil is installed in the upper inner cavity of the pile cap body, the anvil comprising a lower cylinder adapted to the shape of the inner cavity of the cap cylinder, a frustum integrally connected to the top of the cylinder and adapted to the inner cavity of the top plate of the pile cap body, and an upper cylinder integrally connected to the top of the frustum with a diameter smaller than the inner diameter of the upper flange; characterized in that, The pile cap also includes several guide blocks; Several guide blocks are radially connected to the upper inner wall of the cap cylinder in a circumferentially distributed manner, and the inner end faces of the guide blocks are located on a cylinder with a diameter that matches the outer diameter of the pile foundation; the upper end of each guide block is a horizontal plane, and the lower end face of the guide block is an inclined plane with the inner side higher than the outer side.

2. The pile cap of the hydraulic hammer for pile driving according to claim 1, characterized in that, The two sides of the guide block are each connected to the inner wall of the cap tube by two pairs of reinforcing plates, one above the other.

3. The pile cap of the hydraulic hammer for pile driving according to claim 1 or 2, characterized in that, The distance from the upper end face of the guide block to the bottom face of the anvil is L = 300-400mm.

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