JPS59424A - Leveling work of rubble-mound on bottom under water - Google Patents

Abstract

PURPOSE:To make the leveling work of rubble-mound under water efficient by a method in which the raker of a leveler settled on the rubble-mound is rectiprocally moved and then the surface of the rubble-mound is compacted by a tamping roller. CONSTITUTION:A leveler A for rubble-mound under water is made up by a raker 26 and a tamping roller 27 to a truck 15 movably supported on the body leg frame 5 with expandible legs 6. Air is charged into the float tanks 34 of the leveler A and the leveler A is towed to a given place by a crane ship 36. The leveler A is then hung down by a crane 37, water is charged into the tanks 34 to settle the leveler A, and the legs 6 are landed and adjusted to make the frame 5 horizontal. Then, the raker 26 is set at a given height, while the truck 15 is moved back and forth to level off the rubble-mound, the raker 26 is raised, the tamping roller 27 is brought down for finish leveling work, the roller 27 is housed, and then the leveler A is moved over a given distance. Then, the same operations are repeated.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an underwater rubble leveling method for flattening the top surface of one round of rubble piled up on the underwater bottom.

Many of the external structures such as breakwaters and seawalls in ports are caisson-type hybrid levees, in which concrete caissons are placed on top of rubble mounds piled up at the bottom of the water. The process generally consists of (1) throwing rubble from the ship to the bottom of the water, (2) leveling the rubble, (3) installing the caisson from the ship, (4α) filling the caisson with sand, C4h) installing the block, and (5) constructing the upper part of the caisson. .

Figure 1 shows the cross section of the breakwater after construction. In the figure, 1 is the rubble mound, 2 is the caisson installed on the leveled top surface of this rubble mound i, and 3 is the top surface of the rubble mound 1. The covering stone, 4, is a vine ivy.

The work of leveling the upper surface of the rubble mound 1 has conventionally been done manually by divers.

Despite the fact that most other areas of port civil engineering work have been mechanized, the above-mentioned rubble leveling work still has to be done manually by divers. The work efficiency of rubble leveling by divers is extremely poor, and there are increasing calls for mechanization based on the following background.

In other words, (1) divers have fewer resources, and as the population is aging, there is a tendency for divers to be in short supply. (2) The number of construction projects that require large-scale, rapid construction is increasing. (3) Ports are expanding offshore and the water depth for construction is increasing.

(4) From a safety management perspective, it is necessary to eliminate dangerous manual labor.

For this reason, several mechanized construction methods have been proposed and tried, but all of them had problems with leveling accuracy, work efficiency, size of stone that can be leveled, cost, etc., and were not put into practical use. Not yet reached.

Crushed stone, which is usually used as rubble, weighs 30 to 20 pounds per piece.
07f, about 30 to 60an, and the unevenness after being dumped by ship is not more than ±50α.In order to stably install the caisson, it is made with very high precision, for example ±5cI.
Leveling within n is required.

The present invention has been made in view of the above, and aims to provide a submersible bottom rubble leveling method that satisfies the above-mentioned conditions for leveling rubble and enables the leveling of rubble to be performed reliably, accurately, and efficiently. That is.

Embodiments of the present invention will be described below based on FIG. 2 and subsequent figures.

2N is a plan view showing the entire bottom rubble leveling device used in the construction method according to the present invention, FIG. 3 is a side view, and FIG. 4 is a front view. Reference numeral 5 denotes a main body leg frame, and this main body leg frame 5 is configured as shown in FIGS. It has a tiered structure. and 2 on both sides in the longitudinal direction.
It is provided with four legs 6 each. An outer cylinder 7 fixed to the leg 6fi frame, an inner cylinder 8 slidably fitted into the outer cylinder 7, a foot 9 provided at the lower end of the inner cylinder 8, and an outer cylinder 7 and an inner cylinder 8. and a cylinder device 10 that connects the inner cylinder g with respect to the outer cylinder 7 and slides the inner cylinder g with respect to the outer cylinder 7. The longitudinal members of each frame body of the main body leg frame 5 are composed of rectangular pipes.

+1 is a moving membrane frame, this moving membrane frame 11
The frame body has a rectangular planar shape, and legs 6 having the same configuration as the upper main body leg frame 5 are provided at the four corners.

Between the upper horizontal frame 5α and the middle horizontal frame 5h of the main body leg frame 5, the walking frame 12 is the both horizontal frames 5α.

This walking frame 12 is slidably engaged along 5h.
and the main body leg frame 5 are connected via a cylinder device 13. The horizontal frame of the moving membrane frame 11 is slidably engaged with the walking frame 12 in a direction orthogonal to the main body leg frame 5, and the moving membrane frame 11 and the main body leg frame 5 are connected to the cylinder device 14. It is connected at.

A truck 15 is engaged with the middle horizontal frame 5b and the lower horizontal frame 5C of the main body leg frame 5 so as to be movable along the entire length thereof in the longitudinal direction. One end of each rope 18.19 of a winch 16.17 provided at both longitudinal ends of the main body leg frame 5 is connected to both front and rear ends of the truck 15 in the moving direction. The carriage 15 and the horizontal frame of the main body leg frame 5 are engaged through upper and lower rollers 20, 20 and side rollers 21.

The trolley I5 is constructed as shown in FIGS. 8 to 10, and has rollers 2 above and below the frame bodies 22 and 22 on the left and right sides of the moving direction.
0 also has side rollers 21 on the outside of both frames 22 and 22.
is the provision.

The front and rear frames 23 and 23 in the moving direction of this trolley 15 have a platinum on the rear side of each. 24.25 are provided, and of these two brackets 24.25, the front bracket 2
4 is equipped with a rake device 26, and the rear bracket 25 is equipped with a compaction roller device 27.

Each of these devices 26 and 27 has a four-bar link mechanism 28.
It is raised and lowered by a lifting device 30.31 consisting of a lifting cylinder 29 and a lifting cylinder 29. It's becoming a sea urchin. The base ends of each lifting cylinder 29, 29 of both lifting devices 30, 31 are connected to the bracket side via a buffer cylinder 32, as shown in FIG. 33 is a ring that restrains the connecting portion between the lifting cylinder 29 and the buffer cylinder 32.

34. 34 are float tanks provided at the front and rear of the main body leg frame 5, and the third float tank 34 is connected to a compressor provided on the mother ship. 35 is a staff attached to the top of the leg of the main body leg frame 5, and this staff 3
5 is an index for measuring the position of the leveling device and the water depth, and has a vertical structure. staff 35
A level indicator is affixed to the tip of the vessel above the sea surface.

Although not shown, an inclinometer for detecting the inclination of the leveling device is provided on the main body leg frame 5.

Furthermore, the break-in device is equipped with a drive device such as a hydraulic device necessary for remote control from the mother ship, a control device, and a detection device for each operation stroke.

Furthermore, the leveling device is equipped with an ultrasonic topographic surveying device on the cart 15 in order to measure the unevenness of the rubble surface before and after leveling.

The rubble leveling work using the above-mentioned rubble leveling device will be explained below with reference to FIG. 12 and subsequent figures.

(1) Float the rubble leveling device A on the sea surface by injecting air into the float tank 34.
While suspended by crane 37 of No. 6, air is removed from the float tanks 34 and 34, and water is injected into them. In this way, the rubble leveling device is lowered according to the lowering speed by the crane 37 (FIG. 12). At this time, the worker on the quay or caisson
The staff 35 is monitored and positioned using epsilon, etc., and the rope 39 is used to correct the orientation of the bottoming posture. When landing on the bottom, the main body leg frame 50 lands on the four legs 6, and the length of the legs is adjusted to make the frame horizontal.

Next, a reference level is measured by observing the level indicator at the tip of the staff 35 from a quay or the like using the transit 3g, and based on this, the level adjustment amount is set by operating the control panel of the mother ship 36. Thereafter, the legs 6 that are on the ground are expanded and contracted to raise the main body leg frame 5 to a predetermined height and make it horizontal (FIG. 13).

After completing the level setting of the main unit, perform the break-in work. During this break-in work, only the legs 6 of the main body leg frame 5 land on the ground, and the legs 6 of the movable leg frame 11 are kept raised.

The break-in work is performed as shown in Figure 14 (Al-(DJ).
(1) Lower the rake device 26 to the bottom dead center and set it at the leveling height [Fig. 14 (A)]. (The truck !5 is towed by the front winch I6 and the stones are pushed out by the rake device 26 [Fig. 14 (B)]. At this time, the buffer cylinder 3
Due to the action of 20, the shirake device 26 escapes by δ,
Don't get irritated.

For this reason, the winch 17 on the rear side of the rake device 26t'
The rake moves back and forth until the amount of rake escape becomes zero [Fig. 14 (C)]. In addition, when the breaking-in reaction force is large and an overload occurs during the breaking-in operation using the rake device 26, the load is reduced and leveled by raising the rake device 26 by 20 to 30 strokes. (3) Rake device 12
6 is completed, the rake device 26 is raised and stored, the compaction roller device 27 is then lowered, and the cart 15 is reciprocated (approximately 3 times) in the same way as the break-in operation using the rake device 26 described above. and finish smoothing (Fig. 14 (Di)).

Once the above-mentioned break-in work is completed, walk and move laterally. At this time, the break-in work is completed and the weight with the companion part is sufficiently increased.

Walking operation is performed by (1) rake device 26, compaction roller device 2
7 is raised and stored, and the trolley 15 is moved to the center. (2)
The movable leg frame 11 is moved in the direction in which the movable leg frame 11 is to be moved and its legs 6 land on the ground, and then the legs 6 of the main body leg frame 5 are raised and the main body leg frame 5 is moved in the direction in which the movable leg frame 11 has moved. The leg 6 lands on the ground, and from this state the above operation is repeated again to move a predetermined distance.

(3) When walking is completed, adjust the main body leg frame 5 and set the main body leg frame 50 level. The following step-in work and horizontal movement are repeated.

Through the above operation, leveling work is carried out on a predetermined area, and when the work is completed, the float tank 34 of the rubble leveling device is
After injecting air into the vessel, the vessel is lifted up by a crane, floats to the surface, and is then moved.

The water bottom rubble leveling construction method according to the present invention is as described in detail above, and the water bottom rubble leveling device f is made movable from the main body leg frame 5 and the movable leg frame 11 to the front, back, left and right.
t&! After settling on the rubble mound 1 at the bottom of the water and leveling the rubble by reciprocating the rake device 26 along the main body leg frame 5, the surface is smoothed by a compacting roller device that also reciprocates along the main body leg frame 5. [Since the compaction was carried out in step 27 and the main body leg frame 5 was then moved to level the rubble mound of a predetermined area, it was possible to reliably do so without relying on human power.
Able to level rubble with high precision and efficiency.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the breakwater, Fig. 2 and subsequent figures show examples of the present invention, Fig. 2 is a plan view, Fig. 3 is a side view, Fig. 4 is a front view, and Figs. The figure schematically shows the configuration of the main leg frame, moving leg frame, walking frame, and trolley.
Figure 5 is a plan view, Figure 6 is a side view, Figure 7 is a partially cutaway front view, Figure 7α is a sectional view of the legs, Figures 8 to 10 show the truck part, and Figure 8 is a side view. The figure is a plan view, FIG. 9 is a side view, FIG. 10 is a front view, FIG. 11 is a side view showing the elevating device 1 of the compaction roller device, and FIGS. 12 to 14 are explanations of the work performed by the device of the present invention. It is a diagram. 1 is a rubble mound, 5 is a main body leg frame, 11 is a movable leg frame, 26 is a rake device, and 27 is a compaction roller device. Applicant Komatsu Ltd. Representative Patent Attorney Masaaki Yonehara Patent Attorney Tadashi Hamamoto Figure 7. F! 3

Claims (1)

[Claims] The rake equipment f26' consists of a main body arm frame 5 and a movable frame 11, and is movable back and forth, left and right. t- After smoothing the rubble by reciprocating,
The surface is compacted by a compaction roller device 27 that also reciprocates along the main body arm frame 5, and then the main body arm frame 5 is moved to level the rubble mound of a predetermined area. Underwater rubble leveling method.