JPS58178706A - Caisson and its setting - Google Patents

Abstract

PURPOSE:To make easier the production, delivery, and handling of a caisson by a method in which split caisson units for a caisson body are vertically assembled and then connected integrally with each other with a reinforcing material thrust into a through hole vertically piercing the units. CONSTITUTION:A desired size of a caisson body A is split into caisson units 1 as precast blocks and through holes 3 piercing through vertically coupled joints 2 in an uneven form at four corners are provided in the caisson units 1. The seabed ground B is first improved, reinforcing materials 4 are driven and erected on the ground B, foot-protective stones 5 are charged around the reinforcing materials 4, the caisson units 1 delivered to a construction site are lifted up by a crane, the reinforcing materials 4 are fitted into the through holes 3, and the caisson units 1 are settled and stacked up along the reinforcing materials 4. Lastly, a grout is packed into the aperture between the through holes 3 and the reinforcing materials 4 to combine them integrally.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a deep water worker mw-non used for offshore artificial islands, seawall construction, etc., and a construction method thereof.

Since conventional caissons are used in relatively shallow waters, the caissons are generally manufactured in one piece at a caisson yard or factory, and then transported by tow over the sea to the installation site, and then sunk into a predetermined position. For this reason, large-scale caissons are difficult to handle and manufacture, and there are limits to the dimensions and sizes that can be implemented using conventional structures and methods.

By the way, there is now a demand for large caisson for use in deep water. As a solution to this problem, a method was proposed in which the upper part of the caisson was poured with concrete poured in-situ, and the caisson was poured over as the caisson subsided, but this method was extremely difficult to construct on-site.

This invention was developed to solve the above-mentioned conventional problems, and the precast block unit caisson is manufactured in a caisson yard or other suitable location, and then stacked and integrated at the submersion site, making it easy to manufacture, transport, and handle. The details will be explained using examples.

The unit caisson 1 forming a precast block is made by dividing the caisson main body A of a desired size into a plurality of upper and lower unit canes to form nine dimensions and shapes.The joint surface of each unit caisson 1 has an uneven shape, A joining joint 2 is formed which meshes with the joint. Further, at least four corners of each unit caisson 1 are formed with through holes 3 penetrating in the vertical direction.

This unit caisson 1 is manufactured in a caisson yard or the like, and has a size and structure that allows it to be floated and transported by sea.

During installation, first improve the seabed ground B.
A reinforcing material 4 made of steel pipes is driven into the seabed ground B.
The reinforcing material 40 is placed on top of the seabed ground BB, and the foot hardening stones 5 are placed on the seabed ground BB around this reinforcing material 40.

In addition, as reinforcement material 4, P with the lower part fixed to the ground BK is used.
It can be a C strand group.

Next, the unit caisson 1 is transported to the site, lifted by a crane, the reinforcing material 4 is fitted into the through hole 3, the unit caisson 1 is lowered along the reinforcing material 4, and the unit caisson 1 above is sequentially lowered.
Stack up.

Finally, grout is injected into the gap between the upper and lower interlocking joints and the gap between the reinforcing material 4 and the through hole 3, and if the upper and lower units are steel pipes, the steel pipes are filled with concrete or the like.

The hollow portion of each integrated unit caisson 1 is filled with filler if necessary.

Incidentally, footings 6 or precast pedestals 7 may be provided on the legs of the lowermost unit caisson 1 to stabilize the hem of the caisson.

It is preferable that a sheath 8 is provided in the through hole 3 for reinforcement. Moreover, this sheath 8 is the upper and lower unit caisson 1.1
It can be a mutually interlocking joint.

Further, by attaching dowels such as reinforcing bars to the inner and outer surfaces of the sheath 8 and the outer surface of the reinforcing member 4, it becomes possible to further strengthen the connection between the reinforcing member 4 and the unit caisson 1.

Since the present invention has the above-described structure, the unit caissons in the form of precast blocks are stacked and connected to form an integrated caisson of a desired size, making it easy to manufacture, transport, and handle. Therefore, it can be manufactured in a conventional yard, shortening the construction period, allowing rapid construction, and ultimately reducing construction costs.

In addition, the reinforcing material installed on the seabed foundation acts as a guide when the unit caisson sinks, serves as a reinforcement for the integration of each unit caisson, and also serves as an anchor to the seabed foundation, improving stability.

Further, since the unit caissons are overlapped and engaged with each other in a meshing manner, positioning is reliable and there is no risk of displacement due to lateral force.

[Brief explanation of drawings]

1 and 2 are perspective views of a caisson according to the present invention, FIGS. 3, 4, and 5 are sectional views showing the construction process, and FIG. 6 is a sectional view of the main parts. 1.Unit caisson, 2.Joint joint, 3.Through hole, 4
・・Reinforcement material, 5.・ Foot protection stone, 6・・Footing, 7・
- Cradle, 8...sheath, A...caisson body, B...ground. Figure 2 ShiJ() Figure 3 Figure 4 Figure 5

Claims (2)

[Claims] (1) The caisson main body of the desired size is divided into a plurality of upper and lower unit caissons, and each unit caisson is engaged with the upper and lower parts and is integrally connected by a reinforcing member inserted into a vertically penetrating hole. A caisson characterized by the fact that it is (2) Submerged ground (established by driving reinforcing material made of steel pipes, and laying foot protection stones on the ground, then installing unit caissons with upper and lower interlocking joints and vertically penetrating holes at the site) A method for constructing a caisson, comprising: transporting the caisson, fitting the reinforcing material, and injecting grout into the gap between the upper and lower interlocking joints, the through hole, and the reinforcing material to integrally connect the caisson.