JPS641916Y2 - - Google Patents

Description

[Detailed explanation of the idea] (Industrial application field) The present invention relates to an elevating floor type work barge.

(Prior Art) When constructing a concrete structure on the bottom of the water, a work barge 1' for constructing the concrete structure is used, as shown in FIGS. 4 and 5. That is,
This work barge 1' is equipped with a float part 2' and a ballast tank 7' provided below the work floor 3'.In order to perform work in a stable condition, the inside of these ballast tanks 7' and the float part are Load water W is injected into 2' to cancel the buoyant force acting on the work barge 1', and after the work barge 1' is fixed to the bottom of the production mound 8', the concrete structure is placed on the work floor 3'. 9' is being built.

After the concrete structure 9' is completed, all the load water W poured into the interior is drained to create buoyancy, and the work barge 1' is floated with the concrete structure 9' on board and towed to the launching site. (not shown)
Towed by. Then, at the launching site, load water W is again injected into the ballast tank 7' and the float part 2', the work barge 1' is brought to the bottom of the seabed, and the concrete structure 9' is separated from the work floor 3'. and float it to the surface,
They are towing it to a designated storage location.

However, in the conventional work barge 1', the capacity of the load water W injected into the interior is constant, so when working in an area with a large tidal level difference, the barge reaches the bottom of the production mound 8' at low tide. At high tide,
As shown in Fig. 6, the buoyant force increases and becomes larger than the entire weight of the work barge 1', causing the work barge 1' to float up, making it impossible to fix the work barge 1' to the production mound 8', which prevents construction work. Due to the effects of ups and downs, movement, inclination, impact, etc. of the work barge 1' due to wind waves and incoming waves,
This has the disadvantage that it often interferes with work on the work floor 3'.

(Purpose of the invention) This invention was proposed in view of the above points, and its purpose is to make the work floor movable up and down,
By making it possible to increase or decrease the amount of loaded water injected as needed, it is economical and prevents the work barge from floating up, allowing work to be carried out in stable conditions even when working in areas with large tidal level differences. The purpose of this invention is to provide an elevating floor type work platform.

(Structure of the idea) The present invention will be explained below with reference to the drawings.

Figures 1 to 3 show an embodiment of the present invention. In these figures, 1 is a work barge main body, and a float part 2 is provided on the outer periphery of this work barge main body 1. . Reference numeral 3 denotes a work floor provided at the center of the upper surface of the work barge main body 1, and a work floor lifting device 5 is provided between the work floor 3 and the bottom 4 for raising and lowering the work floor 3 as necessary. ing. That is, in this embodiment, the work floor lifting device 5 consists of a large number of hydraulic lifting jacks 5a arranged at predetermined intervals, and by extending the rods 5b, the work floor 3 is lifted upward. The structure is such that the capacity for injecting load water between the vessel bottom 4 and the vessel bottom 4 can be increased. In this case, the outer circumferential portion 3a of the working floor 3 is made slidable by appropriate means against the inner wall portion 2a of the float portion, and is also provided with liquid-tight means to prevent the load water W from entering the working portion. . In addition, 6 is a girder material, and 7 is a ballast tank provided under the work floor 3.

Next, the operation of the present invention will be explained.

First, as shown in FIG. 1, when the water level is low, there is no need to raise the work floor 3, and the work can be carried out as usual. On the other hand, the float part 2 and the ballast tank 7 are
If the work barge 1 floats only by injecting the load water W inside, the work floor 3 is raised by driving the lifting jack 5a as shown in FIG. After that, by increasing the amount of water injected into the lower part of the work floor 3 and increasing the load water W, the weight of the work barge 1 as a whole is increased to prevent it from floating up due to buoyancy, and the work barge body 1 lands on the production mound 8. After fixing and stabilizing the concrete structure, a concrete structure (not shown) is constructed thereon. After construction, as in the past, the load water W from the float part 2 and the lower part of the work floor 3 is extracted, the work barge 1 is floated on the water and moved to the launching site, and then the work barge 1 is submerged in the water. All you have to do is make the structure float on the water.

(Effects of the invention) As described above, according to the invention, in a structure in which a concrete structure is constructed on a working floor while being brought to the bottom or floated by pouring and discharging load water inside, the working floor is raised and lowered. A device was installed to allow adjustment of the amount of load water injected into the lower part of the work floor, allowing the work barge to be completely grounded on the production mound and in a stable state during the pouring of concrete structures. Therefore, work can be carried out stably, and there is no risk of cracking inside the concrete structure placed on the work barge during curing and hardening.

Furthermore, since work can be performed in areas with a large tidal level difference in the same way as in areas with a small tidal level difference, there is no need to prepare a different type of work boat, and equipment costs can be saved.

[Brief explanation of drawings]

Figures 1 to 3 show one embodiment of the present invention. Figure 1 is a side sectional explanatory view of the present invention at a low water level, Figure 2 is a side sectional explanatory view at a high water level, and Figure 3 is an explanatory side sectional view of the present invention at a low water level. FIG. 4 is a partially cutaway plan view of the conventional example, FIG. 5 is a partially cutaway plan view of the same as above, and FIG. 6 is an explanatory view showing the drawbacks of the conventional example. 1... Working barge, 3... Working floor, 5... Working floor lifting device, 5a... Lifting jack.

Claims (1)

[Scope of utility model registration request] In constructing a concrete structure on a working floor by pouring and discharging loaded water into the interior, the concrete structure is brought to the bottom or floated up, and the working floor is provided with a working floor lifting device, and the amount of loaded water is injected into the lower part of the working floor. An elevating floor type work barge characterized by being adjustable.