JPS6133930B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pile driving method using septs and temporary piers.

In order to construct a sea berth, which will serve as a distribution base for storing and managing LPG, petroleum, and chemicals, as well as receiving and receiving operations, piles will be driven into the seabed to serve as the foundation.

For this pile driving work, an offshore workbench called a sepp is usually used to install the casing pipe, excavate the rock, or drive the piles. However, in the past, construction was done on the side of the sep, so construction could only be done in a very limited area. There is also a method of driving piles using only a temporary pier, but with this method, the temporary pier is large-scale and it is difficult to move the construction machinery.

Therefore, the present invention has been made with the object of providing a pile driving method that allows large-sized piles to be driven over a wide range even with a small sep.

Therefore, according to the pile driving method of the present invention, a relatively small sep is installed on the seabed at the location where the piles are to be driven, a temporary pier is installed on the seabed close to the sep, and a movable A garter is mounted on the garter, and the garter is equipped with a swivel platform that can move on the garter and supports the piling tower. It is fixed to the temporary pier, the swivel table is also extended, the load of the casing pipe or steel pipe pile is supported by the sep and the temporary pier, and the casing pipe is erected, rock is excavated, or the steel pipe pile is driven.

Embodiments of the present invention will be described below with reference to the drawings.

In this example, diagonal piles were driven as foundation piles when constructing a sea berth, and the sedimentary layer of the seabed stratum is thin, and with only the sedimentary layer, the rooting length is insufficient to obtain the specified pull-out resistance. First, we will explain the case where it is necessary to provide a rock mass with a pull-out resistance force as an example.

In FIGS. 1 and 2, the sep 1 is designated as a whole by 1, and the sep 1 is installed on the seabed at the pile driving site in a conventional manner. As this set 1, a relatively small one is used. As with conventional seps, on the sep 1 there are installed an anchor winch 2 used to fix the sep, a crawler crane 3 whose casing pipe lifts the steel pipe pile, a hydraulic unit 4, a generator 5, a temporary house 6, etc. There is. A movable garter 7 is provided above the sep 1, and this garter 7 is attached to the sep 1 by means of a jack 8.
It is designed to be extended over the side of the ship. A garter receiver 9 extending downward is provided relatively to the tip side of the garter 7, and a swivel base 10 for supporting a piling tower is provided on the garter 7 so as to be movable relative to the garter 7. , this swivel base 10
is extended by a jack 11. The swivel base 10 is provided with a winch 12 and the like. Reference numeral 13 denotes a pile driving tower, the lower end of which is pivotally supported 14 at the tip of the turning table 10, and the inclination angle can be changed by a cylinder 15 provided between the turning table 10 and the pile driving tower 13. ing. A patel catch 16 for gripping a casing pipe or a steel pipe pile is provided at the lower end of the pile driving tower 13. The one designated as a whole by 17 is a temporary pier installed on the seabed close to sep 1. As shown in the figure, the garter 7 is extended to the side of sep 1, and the legs of the garter receiving jacks 9 are extended to connect it to the temporary pier 17. By fixing, the load of the casing pipe and steel pipe pile is supported by the sep 1 and the temporary pier 17.

During pile driving, a sep 1 is installed on the seabed at the location where the pile is to be driven, and a temporary pier 17 is installed on the seabed in close proximity to the sep 1. The garter 7 is extended to the side of the sep 1 by a jack 8, and the legs of the garter receiving jack 9 are extended and fixed to the temporary pier 17. As a result, the load of the casing pipe or steel pipe pile is supported by the sep 1 and the temporary pier 17. The cylinder 15 is actuated to determine the inclination angle of the piling tower 13, and the jack 11 is used to extend the swivel base 10.

In this state, first attach the casing pipe P to the piling tower 1.
3 and a pile driver (not shown) to drive into the sedimentary layer of silt, sand, etc. until it reaches the bedrock. The figure shows a state where the casing pipe P is driven into the sedimentary layer, the casing pipe P is gripped by the Patel catch 16, and the drill pipe of the excavator is passed through the casing pipe P to excavate the rock. It is connected to the piling tower 13, and rock excavation is performed. When rock excavation is completed to a predetermined depth, the excavator K is removed from the pile driving tower 13, and the steel pipe pile (not shown) is suspended by the crane 3.
The steel pipe pile is passed through the casing pipe P using the casing pipe P, and is erected into the rock excavation hole excavated by an excavator. Next, a grout material such as mortar is filled between the rock mass and the steel pipe pile using a grout pipe passed through the steel pipe pile to integrate the rock mass and the steel pipe pile, and after the specified curing period of the grout material is completed, the casing pipe is removed. Pull out P using a power casing jack, etc. Repeat the above-mentioned work, and when the pile assembly is completed, construct the head of the steel pipe pile. The sea berth will then be constructed using these piles.

Another method for driving piles is to make the diameter of the hole in the rock excavated with an excavator slightly smaller than the diameter of the steel pipe pile, and then drive the steel pipe pile with a pile driver, which allows the friction between the bedrock and the steel pipe pile to be used. The pile may be provided with a pulling resistance force.

As explained above, in the present invention, a movable garter is mounted on the sep, and the sep and the temporary pier are combined so that the load of the casing pipe or steel pipe pile is supported by the sep and the temporary pier. It is possible to construct large piles over a wide range even with a large set, and there are no inconveniences such as the temporary pier being large-scale or the movement of construction machinery being difficult, unlike the method of construction using only a temporary pier. .

[Brief explanation of the drawing]

The drawings show an example of an apparatus for carrying out the pile driving method according to the present invention, with FIG. 1 being a side view and FIG. 2 being a plan view. 1...Sep, 7...Garter, 8...Jackie, 9
... Garter jack, 10... Swivel base, 11... Jacket, 13... Piling tower, 15... Cylinder, 17...
Temporary pier.

Claims (1)

[Claims] 1 A sepp is installed on the seabed at the location where the piles will be driven, and a temporary pier is installed on the seabed close to the sepp.The sepp is equipped with a movable garter, and the garter is equipped with a A swivel base supporting the piling turret is installed, and the garter is extended to the side of the sepp, and the legs of the garter jack attached to the garter are extended and fixed to the temporary pier.The swivel base is also extended, and the casing pipe or A pile driving method using seps and a temporary pier, characterized in that the load of the steel pipe pile is supported by seps and a temporary pier, and casing pipes are erected, rock is excavated, or steel pipe piles are driven.