JPS58222211A - Pile driving work using platform and temporary pier - Google Patents

Abstract

PURPOSE:To permit the driving of large-size piles in a wide range even by small-sized temporary platform by a method in which a girder is mounted on the platform a temporary pier and the platform are combined, and loads on a casing pipe are supported by the temporary pier and the platform. CONSTITUTION:A temporary pier 17 is set on the seabed in close proximity to a small-sized platform 1 set on the seabed where pile is to be driven, a movable girder 7 is mount on the platform 1, and a turning stand 10 supporting a movable pile-driving tower 13 is provided to the upside of the girder 7. The girder 7 is projected on the side of the platform 1, the leg of a girder receiving jack 9 attached to the girder 7 is extended and fixed to the temporary pier 17, and the turning stand 10 is also extened. Then, loads on the casing pipe are supported by the platform 1 and the temproary pier 17, and the casing pipe is erected.

Description

[Detailed description of the invention] The present invention relates to a pile driving method using cep and a temporary pier.

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 SEP is usually used to install casing pipes, excavate rock, or drive piles. However, conventionally,
Since construction was being carried out on the side of the cep, 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 would be large-scale and it would be difficult to move the construction machinery.

Therefore, it is an object of the present invention to provide a pile driving method that allows large-sized piles to be driven over a wide range with a small-sized sepp.

Therefore, according to the pile driving method of the present invention, a relatively small CEP is installed on the seabed at the location where the piles will be driven, and a temporary pier is installed on the seabed in close proximity to the CEP. A movable garter is installed, and the garter is equipped with a swivel base that can be moved on the garter and supports the pile driving tank. The legs of the casing pipe are extended and fixed to the temporary pier, the swivel table is extended, and 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 strata was thin, and with only 1# lamination, the root length was insufficient and the specified pullout resistance could not be obtained. This will be explained using an example where it is necessary to provide a pull-out resistance force to the rock.

In Figures 1 and 2, the number 1 in its entirety indicates a sep, which is installed on the seabed at the pile driving site in a conventional manner. As this set 1, a relatively small one is used. On top of the SEP 1, similar to the conventional SEP, there is an anchor winch 2 used to fix the hips, a crawler crane 3 for hoisting casing pipes and steel pipe piles, a hydraulic unit 4, a generator 5, a temporary house 6, etc. [) is being done. A movable garter 7 is provided on the sep 1, and this garter 7 is extended to the side of the septum 1 by means of a jack 8. A garter receiving jack 9 extending downward is provided at a relatively distal end side of the garter 7.
A swivel base 10 for supporting a pile driver is installed on the top so as to be movable relative to the garter 7, and this swivel base 10 is extended by a jack 11.
0 has the installation number of winch 12, etc. Reference numeral 13 denotes a pile driver, the lower end of which is attached to a pivot 14 at the tip of the swivel base 10.
The angle of inclination can be changed by a cylinder 15 provided between the swivel table 10 and the pile driver 13. A patel catch 16 for gripping a casing pipe or a steel pipe pile is provided at the lower end of the pile driver 13. The one indicated 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 fork/side of Sep 1, and the legs of the garter jacks 9 are extended to the board side. By fixing it to 17, the load of the casing pipe and steel pipe pile is supported by the set 1 and the temporary pier 17.

Pile driving IN: When performing T, 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 close to the SEP 1. The garter 7 is extended to the side of the L-tube 1 with a pitch of 4:8, and the legs of the garter receiving jack 9 are extended and fixed to the temporary pier 17. As a result, the load on the casing pipe or steel pipe pile is reduced to Setsubu 1 and Temporary Pier 1.
7. The cylinder 15 is actuated to determine the inclination angle of the pile driver 13, and the swing table 10 is extended by the jack 11.

In this state, first, the casing pipe P is driven into the deposited layer of silt, sand, etc. using the pile driver 13 and the pile driver (not shown) until it reaches the bedrock. The figure shows a state in which the casing pipe P is driven into the sedimentary layer, the casing pipe P is grabbed 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 pile driver 13 and set in the pile driver 13 to perform rock excavation. 5 if the rock excavation is completed to the specified depth.
- Remove the excavator 1 from the pile driver 13, suspend the steel pipe pile (not shown) using the crane 3, pass the steel pipe pile through the casing pipe P using the pile driver 13, and excavate the rock with the excavator. Built inside the excavation hole. 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. Handle P using a power casing jack, etc. Repeat the above work, and once the diagonal pile is completed, construct the head of the steel pipe pile. The sea berth will then be constructed using these piles.

Another type of driving method 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, so that the friction force between the bedrock and the steel pipe pile is 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. Therefore, it is possible to drive large piles over a wide area with a small L-tube, and it also eliminates the problem of construction methods that use only temporary piers, which require large-scale temporary piers and difficulty in moving construction machinery. This will not cause any inconvenience.

[Brief explanation of drawings]

The drawings show an example of an apparatus for implementing the pile driving T method according to the present invention, and FIG. 1 shows 1. The side view and FIG. 2 are plan views. 1... Sep 7... Garter 8... Jacket 9... Garter receiver jack 10... Swivel base 11... Shitotsuki 13... Pile driving tank 15...
・Cylinder 17...Temporary pier

Claims (1)

[Claims] A cep is installed on the seabed at the location where the piles will be driven, and a temporary pier is installed on the seabed in close proximity to the cep.The cep is equipped with a movable garter, and the garter can be moved on the garter. A swivel base supporting the pile driving tank is installed, and the garter is extended to the side of the cep, and the legs of the garter jack attached to the garter are extended and fixed to the temporary pier, and the swivel base is also extended, and the casing pipe or steel pipe is A pile driving method using a CEP and a temporary pier, which is characterized by supporting the load of the pile with a CEP and a temporary pier, and then erecting a casing pipe, excavating rock, or driving a steel pipe pile.