JPS62273312A - Floating-sinking type boring tower - Google Patents

Abstract

PURPOSE:To obtain a boring tower which can be easily transported and set by a method in which plural independent floating chambers are formed in a base float to be landed to the seabed, and a tower with a working platform is rotatably attached to the base float. CONSTITUTION:Hollow steel tubes 6 are connected into a rectangular frame form, and partition plates 7 are set on adequate places in the tubes 6 to form a base float 5 having plural independent floating chambers 8 and 9. Two struts 17 of steel tubes are rotatably provided through a supporting point 16 to the upside of the float 5, and a working platform 4 is attached to the end of the struts 17. The boring tower is towed on sea to a setting place under a condition that the struts 17 of the tower part 18 are fallen down horizontally. The tower part 18 is erected by stays 19 on the setting plate, and water is charged into the chambers 8 and 9 to settle the base float 5 on the seabed.

Description

[Detailed Description of the Invention] Field of Industrial Application The present invention relates to a tower for relatively shallow seabed fishing.
The present invention relates to a Paulisigator that can be floated on the sea, towed on the sea to the sea surface of the Paulissig point, and then submerged until the base reaches the seabed and installed at the Borissig point.

(b) Conventional technology Conventionally, when conducting a polysig survey of the geology of the seabed in a relatively shallow sea with a water depth of 8 to 30'rn, a polysig tower (+l is the seabed) as shown in Figures 3 and 7 is used. 2), and boring work is carried out on a workbench (4) that is above the sea level (3).

(C) Problems to be solved by the invention Conventional undersea polysig towers must be pre-assembled into a tower shape, transported by boat to the sea surface at the Borisig point, submerged in the sea, and installed on the seabed. Approximately one-half or more of the cost required for the survey was spent on transporting and installing the Polisij Tower by the Qureshi ship.

Accordingly, an object of the present invention is to provide a polling tower that is easy to transport and install to a polling site and can reduce transportation and installation costs.

(d) Means for solving the problem As a result of the inventor's intensive research to solve the above problem, the base of the polling tower itself.

It has a floating structure with a floating chamber and expands in the horizontal direction, and by injecting and draining water into the floating chamber, the polling tower can float and sink, and the polling tower itself can be towed to the polling point while floating on the sea surface. transport,
It was discovered that it was possible to sink the poling tower by injecting water into the floating chamber and install it on the seabed. Furthermore, the floating chamber was divided into at least two chambers, and polling was carried out by sequentially pouring water into each floating chamber.

Next, the content of the present invention will be explained in detail with reference to the drawings. Fig. 1 is a front view of an example of a floating polling tower of the present invention, Fig. 2 is a plan view thereof, and Fig. 3 is a side view thereof. (5) is the base floating body of the polling tower f1+, and the whole has a floating body structure that extends in the horizontal direction by joining hollow steel pipes (6) into a rectangular frame shape.

A partition plate (7) is provided at an appropriate position within the steel pipe (6) constituting the base floating body (5), and a plurality of mutually independent floating chambers (8), (9) are provided inside the base floating body (5). form. Each floating chamber 18
) and (9) are water-injected pulp (lO) and (!l), respectively.
Water injection hole (1, (13) and supply/exhaust hole (14) with
, (15) are provided one or more times.

Also, tow pits H are installed at multiple locations on the base floating body (6).

Two supports (17) made of steel pipes are provided in a V-shape so as to be rotatable about a fulcrum (16) provided on the base floating body (5),
A workbench (4) is rotatably attached to the tip of the support column (17). It is a stay made of steel wire that is fixed upright.

FIG. 4 is a top view of another embodiment of the floating and sinking type polling tower of the present invention, in which the base floating body (5) and the support column 07 of the tower made of steel pipes are divided into a plurality of steel pipes, and each steel pipe is divided into a plurality of steel pipes. Attach flanges (20) to both ends of the flange (20).
It is constructed so that it can be assembled and disassembled by fastening the parts.

In each of the above-mentioned sides, the base floating body (5) of the floating type polling tower of the present invention is constructed by joining steel pipes into a rectangular shape, but it does not necessarily have to be constructed from steel pipes, and has floating chambers in at least two places. However, it is sufficient that the structure extends horizontally, and the overall planar shape does not need to be rectangular.
Polling tower with tower part j18) erected on top = (1
) Any shape is acceptable as long as the entire structure floats stably on the sea, can be stably installed on the seabed, and there is no risk of tipping over when it sinks or rises.

The tower part (national support (17)) of the present invention is not necessarily the fulcrum (
+6) It is not necessary to provide it so that it can be rotated to stand up and fall down, but it may be fixed immovably on the base floating body (5) and provided upright.

(e) Function To use the floating polling tower of the present invention, the first
As shown by the chain line in the figure, the support of the tower part (18) (1) laid down horizontally, or the solid line support j17 in Figure 1)
The vessel will be floated to the sea in an upright position and towed by tugboats, etc. to the Borisig point. Then the pillar (17)
When the tower section (18) is laid down, the tower section (18) is first rotated to stand up, and then fixed at a predetermined upright angle by the stay (19). The standing angle θ is determined according to the depth of the seabed so that the workbench (4) is located 3 m above the sea surface when installed on the seabed. The workbench (4) is fixed in advance at an angle that makes it horizontal when the tower part (+8) is erected.

Next, the floating chamber (
8) Open the water injection pulp (lO) and exhaust the air from the supply/exhaust hole (I4), and then inject seawater into the floating chamber (8). Due to this water injection, the entire polling tower gradually tilts and sinks from one end, and as shown in FIG. 5, one end of the base floating body (5) touches the seabed. Next, surround the water-filled pulp (!l) in the floating chamber (9) near the workbench (4) and fill it with water, and the base floating body (5)
The entire Borisijji Tower fi1 rotates around the grounding end (21) that touched the seabed at the tip of the base floating body (5), and the work platform (4) reaches a predetermined height above the sea surface. Fixed in position.

When removing the boring tower +1) after completing the polisig work, contrary to the above installation, supply compressed air from the supply and exhaust hole (!5) to the floating chamber (9) near the workbench (4). After introducing the water and draining water from the water injection hole, the base floating body (
5) One end is floated, and then air is sent to the other floating chamber (8) to drain water, and the entire boring tower is floated.

As shown in Fig. 4, if the base floating body (5) and the support column θno are divided into a number of steel pipes and assembled by fastening the flanges (201) at both ends of the steel pipes, it is possible to avoid towing the Borisig Tower to a remote location. The entire Borishita Tower can be disassembled and quickly transported overland by truck, etc. In this case, for example, a large base floating body of 20ffl x 35m (5
) is disassembled into steel pipes with a length that can be loaded on a regular truck of about 127Fl.

Effects of the Invention According to the floating type boring tower of the present invention, it is not necessary to use a Qureshi ship to transport and install all the towers at the designated boring points, but the tower is towed by an R9 diport, etc., and the tower is transported to the seabed by water supply and drainage in the floating chamber. It is possible to significantly reduce the cost of transportation and installation of the borehole, which accounts for the main part of the survey cost. By providing multiple floating chambers and sequentially supplying and draining water into the floating chambers, it is possible to prevent the tower from falling due to sinking and surfacing, and the installation work of the boring tower can be carried out even at sea with high wave heights.

If the support of the tower section is made rotatable, the height of the workbench from the base floating body can be adjusted arbitrarily depending on the depth of the seabed, thereby fixing the workbench at a constant height above the sea surface.

By configuring the base floating body and the strut so that they can be disassembled and reassembled using flanges or the like, it is possible to disassemble and easily transport the pole cistern by land, and the length of the strut can be adjusted.

[Brief explanation of drawings]

FIG. 1 is a front view of an example of a floating type Borisige tower of the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is a side view thereof. Fourth
The figure is a plan view of another embodiment of the floating-type polysci tower of the present invention, and FIG. 5 is an explanatory diagram of the method of installing the polysci tower of the present invention. FIG. 3 is a front view of an example of a conventional borehole tower, and FIG. 7 is a plan view of the same. fil...Boring tower (2)...Undersea (3)
... Sea surface (4) ... Workbench (5)
... Base floating body (6) ... Steel pipe (7) ...
Partition plate (8), (91... floating chamber 110
), (Ill... water injection pulse (121, (1
3)... Water injection hole (+4), (1 (to)... Supply/exhaust hole (country... fulcrum (I... support)
(18)...tower part t, 19)...ste=
(20)...Flange (21)...Grounding end
(Company)...Towing pit patent applicant: Geiko Iron Works Construction Co., Ltd. Representative patent attorney: Yoshiyuki Koyama Figure 7 Figure 3

Claims (4)

[Claims] (1) Consisting of a horizontally extending base floating body with a plurality of independent floating chambers, and a tower section erected on the base floating body and having a workbench at the top, each of which has a plurality of independent floating chambers. A floating type boring tower characterized by having a water injection hole equipped with water injection pulp and a supply/exhaust hole. (2) A floating type boring tower according to claim 1, wherein the tower portion is configured to be able to rise and fall by rotating around a fulcrum fixed on a base floating body. (3) A floating type boring tower according to claim 1, wherein the base floating body is constructed by joining steel pipes into a rectangular frame shape. (4) The floating type according to claim 3, wherein the base floating body and the tower support are divided into a number of steel pipes, assembled by fastening flanges attached to both ends of the steel pipes, and configured to be disassembled. bowling tower.