JPS6112054B2 - - Google Patents

Description

[Detailed Description of the Invention] This invention is directed to the use of rubble, sand, broken frames, compaction,
This invention relates to a leveling work construction method and its construction equipment.

Conventionally, compaction and leveling work has been performed on land using bulldozers, rollers, rammers, etc.

However, in recent years there has been a remarkable mechanization of marine civil engineering work, but underwater rubble embankments, which are used for underwater foundations such as concrete caissons, box blocks, blacks, and oil well scaffolding under deep water, are particularly useful for the use of stone throwers from the sea. Then, the lower part of the rubble embankment is made of small stones and the upper part is made of large stones.

Furthermore, the compaction and leveling work of underwater rubble embankments is extremely difficult and is currently carried out using the following methods.

That is, the diver method.

Method using a leveling tool.

Method using underwater bulldozer.

Tamping method using a weight.

Method using an underwater leveling ruler boat.

Method by screed.

However, these methods have the following problems.

○B The rubble embankment has not been sufficiently compacted and has not settled.

○B On sandy or soft ground, rubble embankments are often scoured by waves, broken stones sink in, and ground subsidence, resulting in loss of broken stones and uneven settlement of superstructures.

○C Increase the top height of the underwater rubble embankment by the amount of subsidence, and
It takes a long time to be pounded by the waves for more than a season, compaction, and subsidence, then refilling with rubble and constructing the superstructure.

○ D. Safety management and labor management are complicated due to the shortage of divers, the occurrence of diving diseases, and restrictions on working hours.

○E If it is done by divers, work efficiency may be reduced due to bottom swells and seawater pollution.

○F Machinery and equipment costs are large.

Therefore, future work of this type is to overcome and improve these problems.

Therefore, we used conventional crane ships, hoists, etc. and simple stone crushing, rolling, and leveling construction equipment to achieve high efficiency.
The purpose is to perform finishing leveling work on underwater rubble embankments with high precision.

In particular, while actively crushing broken stones,
The purpose is also to build a strong rubble embankment by combining large and small stones and compacting them.

In addition, it is an object of the present invention to provide a construction method and equipment that can uniformize construction management, shorten construction period, and reduce construction costs.

The gist of the present invention for achieving the above objects is as follows:
It is as follows.

By assembling the cylindrical frame 1 with an uneven tip into various shapes, or by inserting a long iron chisel 6 into the cylindrical frame 1 from the head of the cylindrical frame 1, it is possible to crush stone, crush it, and equalize it. Assemble construction equipment Z.

The construction device Z is suspended in the water by a crane ship 9 or the like, and the cylinder frame 1 and the iron chisel 6 are repeatedly dropped and struck against the upper surface of the underwater rubble embankment 1, either simultaneously or individually.
The broken stone is crushed and compacted using the cylindrical frame and the cutting edge of an iron chisel, and the construction device Z is moved horizontally to remove the cylindrical frame 1.
This is an underwater rubble embankment leveling construction device that sweeps and levels broken stones 13 with the cutting edge of an iron chisel 6.

Next, the configuration and operation of the present invention will be explained with reference to the drawings.

Various types of stone crushing, rolling and leveling construction equipment Z will be explained.

<Example 1 of the construction device> The cylindrical frame 1 is made of a heavy thick-walled steel plate and is in the shape of a long column with both ends open.

The tip of the cylindrical frame 1 is preferably made of cemented carbide, and the tip surface may be flat, toothed or corrugated.

As a method of assembling the cylinder frame 1 into various forms, depending on the size of the cross-sectional shape (diameter, etc.) of the cylinder frame 1, an appropriate spacing member 2 is used so that the center of the cylinder frame is at the same point. , the cylinder frames may be stacked with a gap 12 between them, or a plurality of cylinder frames may be bundled together to form a cylinder frame.

Then, each cylinder frame 1 is fixed to each other by using a penetrating rod 3 in a direction perpendicular to the longitudinal direction of these cylinder frames 1 or by fitting a bolt 4, so that the tip of each cylinder frame 1 is on the same plane. You may do as you like.

<Example 2 of the construction device> The situation when the iron chisel 6 is installed in the cylinder frame 1 shown in the above-mentioned <Example 1 of the construction device> will be described.

Holes are made in the steel plate at appropriate intervals to form a perforated plate 5, and the perforated plate 5 is installed on the top surface of the head of the cylinder frame so that the holes in the perforated plate 5 and the gap 12 of the cylinder frame 1 match. .

An iron chisel 6 is inserted into the hole of the perforated plate 5 from the top of the cylinder frame, and stored in the cylinder frame. The head of this iron chisel 6 has a suitable weight knob 7, and its tip is a long column with a sharp point. When the cylinder frame 1 is suspended by the hanging rope 8, the tip of the iron chisel 6 protrudes from the front end surface of the cylinder frame 1 by an appropriate length, and the weight knob 7 of the head of the iron chisel 6 is connected to the perforated plate. 6 to prevent it from falling off.

Furthermore, it is preferable that the cylinder frame 1 and the iron chisel 6 or the perforated plate 5 be individually suspended and held by individual suspension ropes 8 having different mechanisms.

Furthermore, it is preferable to insert the iron chisel 6 into the gap 12 in which the cylinder frame 1 is partitioned by the spacer 2 to prevent the weight knob 7 on the head of the iron chisel from falling out of the gap 12 between the cylinder frames. At this time, the cylinder frame 1 and iron chisel 6
are preferably suspended and held by individual suspension ropes 8 each having a different mechanism.

<Example 3 of construction equipment> A strong vibration vibrator may be installed on the head of each of the cylinder frame 1 and iron chisel 6 assembled in various forms of <Examples 1 and 2 of construction equipment> (not shown). figure). At this time, each cylinder frame 1 and iron chisel 6 may be suspended by suspension ropes 8 having different mechanisms.

Next, the construction procedure will be explained.

<Construction example 1> A rough rubble embankment 11 is constructed using broken stones 13 thrown in by a stone thrower. Subsequently, the crane ship 9 on which the stone crushing, rolling, and leveling construction equipment Z is suspended is anchored above the sea surface of the underwater rubble embankment 11 using an anchor wire 10.

By repeating dropping and impacting motions of the construction device Z from an appropriate height, the broken stones 13 on the top surface of the heavily uneven rubble embankment 11 are cut using the cylindrical frame 1 and the cutting edge of the iron chisel 6.
Crushing the stone and making the mesh of large and small stones good,
A strong rubble embankment 11 is built, and the upper surface of the rubble embankment is leveled to a specified height.

The method of dropping the construction device includes a method of dropping the cylinder frame 1 and the iron chisel 6 at the same time, a method of dropping the cylinder frame first,
After that, there are methods such as dropping the iron chisel, or vice versa, dropping only the cylinder frame, and removing the penetrating rod 3 and dropping each cylinder frame individually.

<Construction Example 2> One end of the wires a and a' are attached to both sides near the tip of the cylindrical frame 1 of the construction device Z, and the other end is an anchor b installed in an appropriate direction far from the rubble embankment 11.
It is wrapped around winches c and c' of a crane ship via b'.

The construction equipment Z is suspended from the crane ship 9,
While bringing the cutting edges of the cylinder frame 1 and the iron chisel 6 into proper contact with the rubble surface, and at the same time alternately winding up the wires a and a' with the winches c and c' of the crane ship 9, the construction equipment Z is leveled. The movement is repeated to remove and eliminate the excess split stones 13 on the construction base of the rubble embankment 11, so that the upper surface of the rubble embankment 11 has a specified leveling surface height.

In the case of Example 3 of the construction equipment described above, it is preferable to move the construction equipment horizontally on a crane ship while vibrating the cylindrical frame and iron chisel of the lowered construction equipment with a vibrator.

As mentioned above, according to the device of the present invention, the cylindrical frame and iron chisel of the construction device are heavy, so the crushing force of the broken stones is very large.

Even if there is an excessive supply of broken stones, the broken stones can be removed, swept out, and rough-leveled.

3. Crushing the split stone appropriately, compacting it, and finishing leveling.
Since two tasks can be performed at the same time, work efficiency is high, and both construction costs and construction times can be significantly reduced.

It has a positive effect on the stability of rubble embankments, the settlement of broken stones, and the stability of superstructures.

Since the tip of the cylindrical frame has an open cross section, there is little resistance to falling into the water, the direction of the fall is good, and it is possible to effectively hit broken stones.

The leveling accuracy of rubble embankments and rubble foundations is very good, regardless of the size or depth.

Eliminates the hassle of labor and safety management associated with diving work.

In the conventional method of dropping a weight to the bottom of the water, it is extremely difficult to accurately hit the spot where the weight should hit.

This is because water resistance acts heavily on the weight, and it must be lowered gently in order to strike at an accurate location.

If you lower it gently, the striking position will be more accurate, but of course the striking energy will decrease.

In the method of the present invention, the cylindrical frame group is first gently lowered to the water bottom to secure the position at the water bottom where crushing is to be performed.

Next, if an iron chisel is passed through the cylinder frame and dropped without reducing the impact energy, the sharp chisel tip can be struck at a precise location to destroy the chisel.

Alternatively, if you first lower the iron chisel group gently to the bottom of the water and then drop the cylindrical frame group using the iron chisel as a guide, you can destroy a certain area shallowly and widely without reducing the impact energy. can.

There are advantages such as

[Brief explanation of drawings]

FIG. 1 and FIG. 2 are explanatory diagrams of the construction device.
3 and 4 are longitudinal sectional views of the construction device.
Figures 5 and 6 are side views showing the construction status;
The figure is a plan view thereof. 1... Cylinder frame, 2... Spacing material, 3... Penetration rod, 4
...〓, 5... Perforated board, 6... Iron chisel, 7...
Weight lump, 8... Suspension rope, 9... Crane ship, 10...
...Anchor wire, 11...Rubble embankment, 12...Gap, 13...Cracked stone, a...Wire, b...Anchor, c...Winch, Z...Cracked stone crushing, rolling and leveling construction device.

Claims (1)

[Scope of Claims] 1 A group of cylindrical frames with both upper and lower end surfaces open, and a group of iron chisels inserted into each cylindrical frame of this cylindrical frame group so as to be slidable in the vertical direction, are independently dropped to the bottom of the water. Leveling construction method for underwater rubble embankments. 2. Consists of a cylindrical frame group with both upper and lower ends open, a group of iron chisels inserted into each cylindrical frame of this cylindrical frame group so as to be slidable in the vertical direction, a lifting device for the cylindrical frame group, and a lifting device for hoisting the iron chisel group. , Underwater rubble embankment leveling device.