JPH0329390Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an underwater foundation leveling device for creating an underwater foundation when constructing a breakwater or the like.

[Conventional technology]

To construct a breakwater, etc., rubble stones are thrown into the water to create an underwater foundation, and caissons or blocks are installed on this underwater foundation. Leveling the top of the underwater rubble foundation and compacting it are necessary to ensure the accuracy of the installation of caisson etc. and to prevent the caisson etc. from sinking over time.
The third method for leveling the top of conventional underwater rubble foundations is
There is something like the one shown in the figure.

In other words, a tower a with the required weight is hoisted by a crane ship, dropped, and the impact of the fall smoothes the top of the underwater rubble, compacts it, and determines the horizontal state of the top and the water depth when the top is leveled. This is done by measuring the verticality of the part that protrudes above the water and the change in height of the protruding part from the horizontal.

[Problem that the invention attempts to solve]

However, in the conventional method described above, the damping force of water reduces the impact force when falling, and in order to achieve a sufficient leveling of the top and consolidation effect, the weight must be large. The top of the tower for measuring verticality and water depth must protrude above the water surface.

For this reason, the turret must be large, expensive to manufacture, and difficult to work with and troublesome to handle.

[Means for solving problems]

This invention was created in view of the above circumstances, and
A hydraulic hammer having a striking ram and an anvil disposed below the ram in a vertically movable manner is supported slidably in the vertical direction on a hammer guide immersed in water by a hanging rope. A consolidation head having a consolidation seat at its lower end, in which a plate is fixed in a grid pattern in a space surrounded by a ring, is disposed at the lower end of the hammer guide, and an upper end of the consolidation head is attached to the anvil. Fit and tighten.
An air hose for supplying compressed air into the space is connected to the consolidation head.

[Effect]

When compacting submerged rubble by leveling it, if you drive the hydraulic hammer while supplying compressed air from the air hose into the space of the consolidation seat, there will be no water between the rubble and the consolidation head. There is no damping or buffering effect, and the striking force of the hydraulic hammer can be effectively transmitted to the rubble.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

A hydraulic hammer 1 is slidably supported by a hammer guide 2. A funnel-shaped ring seat 3 is fixed to the tip of the hammer guide 2, and a cushion rubber 4 is attached to the inner surface of the ring seat 3. A compression head 5 is connected to the ring seat 3 via a cushion rubber 4.
The consolidation head 5 and hammer guide 2 are connected by a rope 6 so as not to fall off. Reference numeral 7 designates a ram of the hydraulic hammer 1, and an anvil 8 is provided at the tip of the hydraulic hammer 1 in a freely movable state in the axial direction, and the anvil 8 is fitted into the upper end of the consolidation head 5.

Next, the consolidation head 5 will be explained.

A cone 9 that is funnel-shaped and tightly contacts the ring seat 3 is provided with a seat 10 that fits with the anvil 8 at the upper end, and a strength plate 11 is fixed to the lower end. A cross-shaped reinforcing member 12 is provided inside the cone 9, and an air hose 13 connected to a compressed air source (not shown) is communicated with the inside of the hollow cone. The strength plate 11
Attach the compression seat 14 to the bottom surface of the The compression seat 14 has a ring 15 wrapped around its outer periphery, and a plate 16 is fixed to the inside of the ring 15 in a grid pattern. Further, the space 17 surrounded by the ring 15 and the inside of the cone 9 communicate through a through hole 18.

Further, an air hose 19 communicating with a compressed air source is connected to a position corresponding to the lower end of the ram 7.

Note that 20 is a hydraulic hose for supplying pressure oil to the hydraulic hammer 1. Reference numeral 21 denotes a measuring rod attached to the hammer guide 2 parallel to the axis of the hydraulic hammer 1, and its upper end protrudes above the water surface. 2
2 is rubble, and 23 is a crane hanging rope.

Next, when the rubble 22 is leveled and compacted using the above-described device, compressed air is supplied from the air hoses 13 and 19 to the tip of the hydraulic hammer 1 and inside the cone 9. The compressed air fills the striking surfaces of the ram 7 and the anvil 8 and the periphery of the anvil 8, and leaks from the lower end of the hydraulic hammer 1. Further, the air fed into the cone 9 fills the inside of the cone 9 and the inside of the compression seat 14, and leaks out from the lower end. When the hydraulic hammer 1 is operated by supplying pressure oil in this state, the ram 7 strikes the consolidation head 5 via the anvil 8, and this striking force is transmitted to the rubble 22 via the consolidation head 5, is leveled and consolidated.

Therefore, there is no water between the striking surfaces of the ram 7 and the anvil 8, and the inside of the consolidation seat 14 is filled with air, and the surface in contact with water is the end face of the plate 16 that constitutes the consolidation seat 14. Very few. Therefore, there is almost no buffering effect of the impact force due to water, and the rubble 22 can be leveled and compacted very effectively.

Further, the levelness of the top of the underwater foundation and the water depth may be determined using the measuring rod 21 in the same manner as in the past.
However, in this case as well, the measuring rod 21 can be a simple rod erected, so the structure is extremely simple.

[Effect of idea]

As described above, the present invention exhibits the following excellent effects.

(i) Crane work is easy as it is only necessary to place this device on the top.

(ii) Since there is almost no attenuation or buffering effect of water, it is possible to reduce the capacity and size of the device.

(iii) Since the device can be made smaller, it is easier to handle and transport.

(iv) The structure of the device is simple and small, so the manufacturing cost is low.

[Brief explanation of drawings]

Fig. 1 is a partially sectional elevational view of the leveling device for underwater foundations according to the present invention, Fig. 2 is a view taken along arrow A-A,
FIG. 3 is an explanatory diagram of a conventional example. 1 is a hydraulic hammer, 5 is a consolidation head, 13 is an air hose, 14 is a consolidation seat, 16 is a plate, and 22 is a rubble.

Claims (1)

[Scope of utility model registration request] A hydraulic hammer having a striking ram and an anvil disposed below the ram in a vertically movable manner is supported slidably in the vertical direction on a hammer guide immersed in water by a hanging rope. a consolidation head having a consolidation seat at its lower end with plates fixed in a lattice pattern in a space surrounded by a ring;
The underwater foundation is arranged at the lower end of the hammer guide, the upper end of the consolidation head is fitted into the anvil, and an air hose for supplying compressed air into the space is connected to the consolidation head. Leveling device.