JPS62291328A - Consolidating and leveling work for underwater rubble mound - Google Patents

Abstract

PURPOSE:To exactly consolidate and level off a rubble foundation to a scheduled height by automatically measuring the height of rubble mound by the sending amount of a wire from which a weight is hung down. CONSTITUTION:Rubble 14 for forming a foundation is dumped onto the bottom 12 under water until a scheduled foundation height Ho is exceeded by a given amount. The upside of the rubble mound 14 is flatly leveled off to the height Ho by repeatedly dropping a weight 18. In this case, the dropping height of the weight 18 is regulated on the basis of measured values obtained by an automatic measurer for the height of the rubble mound 14 on the bottom 12 from the sending amount of a wire 28 from which the weight 18 is hung down. The underwater rubble foundation can thus be exactly consolidated and leveled off to the scheduled height and the efficiency of operations can be raised because the number of workers can be reduced.

Description

[Detailed Description of the Invention] 3. Detailed Description of the Invention [Field of Application of the Invention 1] Relating to a construction method for consolidating and leveling stone foundations, in particular, it relates to a construction method in which a weight falls onto the top surface of rubble piled up on the bottom of a water body by dropping it. This paper relates to a method of consolidation and leveling of leveled submerged rubble foundations in which the upper surface is flattened by repeated repetitions.

[Prior Art] In this type of construction method, rubble for foundation formation is dropped onto the water bottom and piled up until it exceeds the planned height of the foundation by a predetermined amount.

And due to repeated falling of the weight.

The upper surface of the rubble on the bottom of the water is roughly leveled.

Furthermore, the upper surface of the rubble on the water bottom is flat 1 [1] at the basic needle-image height.
The fall of the weight is repeated until , and during that time the falling height of the bell is adjusted to yJ.

Here, in the conventional method, a single weight is used to measure the depth of the water using a scale that protrudes above the water surface and a measuring device installed on the existing structure.
: The height of the −L surface of the rubble was measured, and the falling height of the weight was adjusted according to the measured height.

In this way, the falling height of the weight is 11 centimeters above the top of the rubble above the water bottom.
Suga ``?11i packing pardon'' pattern: ^-↓Yu J Honcho - It becomes possible to consolidate and level accurately to both heights.

[Conventional Problems] However, in the conventional construction method, in order to adjust the falling height of the weight, a graduated scale protruding above the water surface from a single weight and a measuring device prepared on the existing structure are used to measure the bottom of the water. Since the height of the upper surface of the upper rubble was measured, there was a problem in that a person was required to carry out this measurement in addition to the operator of the device for pulling the weight and dropping it.

In addition, it is necessary for the measurement personnel to repeatedly inform the operator of the measured height using a transceiver, etc., and in order to measure the height of the weight fall, the weight must be raised to the top, stopped once, and then dropped. There was also the problem that the height had to be measured, reducing work efficiency.

[Object of the invention] The present invention has been made in view of the above-mentioned conventional problems, and
The purpose is to quickly and accurately consolidate and level the underwater rubble foundation to the planned height, as well as to reduce the working depth r:L and improve work efficiency. The objective is to provide a consolidation and leveling method.

[Summary of the Invention] In order to achieve the above object, the present invention involves dropping rubble for foundation formation onto the water bottom until it exceeds the planned height of the foundation by a predetermined amount.1.
By repeatedly dropping the weight, the top surface of the rubble at the bottom of the water is leveled, and the top surface of the rubble on the bottom of the water is leveled at the foundation plan height. The height of the falling weight is adjusted based on the height measured by the measuring device that automatically measures the height of the top surface of the rubble above the water bottom from the feed rate of the wire from which 54 is suspended. It is characterized by

In this way, since the falling height of the single weight is adjusted according to the water bottom and the top surface height of the rubble, it becomes possible to quickly and accurately consolidate and level the underwater rubble foundation to the planned height.

Also, based on the measurement height of the measuring device that automatically measures the top surface height of the ripple above the water bottom from the feed rate of the wire on which the φ' weight is suspended, the weight S! Since the falling height is adjusted, there is no need for personnel to perform this measurement, and there is no need to repeatedly communicate the measured height using a transceiver etc. to the operator of the device that lifts the weight and drops it. .

[Effect of the invention] Therefore, according to the present invention, it is possible to accurately consolidate and level the underwater rubble foundation to the planned height, and it is also possible to reduce the number of working personnel and improve work efficiency at the same time. becomes.

[Embodiments of the Invention] Hereinafter, preferred embodiments of the present invention will be described based on four aspects.

In this embodiment, as shown in FIG. 1, a caisson yard 10 (structure) for constructing a breakwater is installed on the seabed 12-H.

And the rubble 1 that forms the foundation of this caisson yard 10
4 was dropped on the ocean floor as shown in Figure 2 (A), and the same figure (B).
) can be stacked like this.

Rubble stones 14 are stacked up to a height Hl, and flag bearers 16 are erected on both sides as shown in Fig. 1.

Furthermore, by repeating the falling of the plumbstone 8 shown in Fig. 3, the upper surface of the seabed 12 and the debris 14 is as shown in Fig. 2 (C).
It is roughly leveled and is said to be approximately flat.

This rough leveling is carried out to the extent that the weight 18 does not extremely lose its horizontal position when it touches the bottom, and its position is as shown in Figure 3.
8 is determined from the inclination of the part of the tower 1 that protrudes above the sea, and at the same time, the convex direction between the surfaces of the rubble 14 is also determined.

As shown in Fig. 3, the tower l is constructed by arranging beams 5 and braces 6 at appropriate intervals on four pillars 4, which are fixed on the top surface of a weight-18. At the tip of No. 4, there is a gold wire hook Jj, No. 9.

In addition, the weight 18 of this embodiment has a water body formed of a rectangular extra-thick steel plate 20, and as can be understood from FIG. Made of protrusion 22
A drain hole 24 is formed in between, which reduces the falling resistance of the weight 18 and prevents small rubble 14 from scattering when the weight 18 lands on the bottom.

Connecting fittings 26 for the tower 1 are provided at the four corners of the upper surface of the extremely thick steel plate 20, and the weight 18 is suspended horizontally from a wire 28 via a loop 1.

It is also possible to omit the tower 1 in Fig. 3 and directly hang the weight 18 with the wire 28 as shown in Fig. 4 (B), in which case the pole 19a is planted on the weight 18. The direction of the unevenness on the top surface of the rubble 14 is determined from the inclination of the marker 19b provided at the tip thereof and protruding above the sea surface.

When the above rough leveling is completed, as shown in Figure 2 (D), while adjusting the falling height of the weight 18, until the top surface of the seabed 12 and the upper rubble 14 becomes level at the foundation plan height HO. The fall is repeated.

Thereafter, a caisson yard 10 is installed on top of this underwater rubble foundation as shown in Figure 1.

Here, the adjustment of the falling height of one weight is performed based on the measurement height of a measuring device that automatically measures the height of the upper surface of the seabed 12 and the upper rubble 14 from the feed rate of the wire on which the weight 18 is suspended for two days. This measuring device is installed in the crane ship 30 shown in FIG.

As shown in FIG. 6, the winding machine 38 for the wire 28 placed a in the crane operating room 32 is controlled by the operation of the g IJ panel 36 installed in the crane operating room 32, and the load is transferred to the load cell. Also, as shown in Figure 5, the pulley 42 installed at the tip of the crane
A cross section is shown in FIG. 7, and as shown in FIG. 8, white and black patterns 44 are formed alternately in a circle on the outermost portion of one side thereof.

A sensor support plate 46 is coaxially supported in parallel with the pulley 42, and a sensor box 50 attached to the peripheral edge of the outer surface of the sensor support plate 46 has a sensor box 50 facing the pattern 44 with a predetermined gap therebetween. A pair of light receivers 52a and 52b are provided (see FIGS. 7 and 8).
.

Therefore, when the pulley 42 is rotated by the wire 28, the number of detection pulses corresponding to the amount of feed of the wire 28 is obtained in each of the light receivers 52a and 52b.
The spacing between the light receivers 52a and 52b is set so that these detection pulses have a phase difference of 90 degrees.

In FIG. 6, a rotation direction determination circuit 54 of the measuring device
The direction of rotation of the pulley 42 is determined using these detection pulses, and the microcomputer 56 uses the determination signal to determine the direction of the weight 18! Is the customer busy? Wire 28
but! ! It is determined whether the file is currently being uploaded or not.

Further, the feed amount calculation circuit 58 counts the detection pulses of the light receiver 52b, and the count value is determined by the keyboard 60 when the weight 18 is raised to a predetermined position.
It is reset by the microcomputer 56 according to the operation.

This corresponds to the feed amount of 2 gates 28 when Y wa enters 6 deha - ^ ~ / L 11iI ↓ de pattern tun 廿helm.

Furthermore, the load detected by the load cell 40 is determined by the comparison circuit 6.
2, the detected load is compared with the set load from the keyboard 60, and when it is confirmed from the comparison signal that the detected load is greater than the set load, the microcomputer 56
In this case, it is detected that the weight 18 has left the bottom.

In this microcomputer 56, when the fall of the weight 18 is confirmed from the judgment signal of the rotational direction judgment circuit 54, and when the count value of the feed amount calculation circuit 58 stops thereafter, the weight 18 reaches the bottom. is confirmed, and the count value at that time is stored.

Further, from the determination signal of the rotation direction determination circuit 54, the wire 28
When it is confirmed that the start of winding has started, and when it is confirmed from the comparison signal of the comparison circuit 62 that the detected load has become the set load tool-hi, and the bottoming out of the weight 18 is detected, the arithmetic circuit 58 The count value of is read, and the difference between that count value and the +α count value is determined.

This difference is subtracted from the memory count immediately when the memory count is lost.
From this 1, the height of the top surface of the seabed 12 and rubble 14 can be determined daily.

The upper surface height automatically measured from the feed amount of the wire r28 in this way is given to the control panel 36, and the height F of the weight 18 is automatically determined by the control panel 36 when the drive side piece of the winder 38 is moved. adjusted accordingly.

In addition, the top surface height automatically determined by 3+ and 11 is determined by the printer 64.
(= is given, and the printer 64 prints it.

The printed content is confirmed by the operator of the control panel 36, and the falling height of the weight 18 is manually corrected as necessary.

The manual correction can be made using the control panel 36 or keyboard 6o.
This is done by the operation of

As can be understood from the above explanation, the falling height of the weight is adjusted according to the two-sided height between the underwater bottom and the picked up stones, so it is possible to accurately consolidate and level the underwater rubble foundation to the planned height. becomes possible.

In addition, the height of the weight fall is adjusted based on the measurement height of the measuring device that automatically measures the top surface height of the rubble above the water bottom from the feed rate of the wire on which the lli is suspended, so the number of personnel who perform this measurement becomes unnecessary.

Furthermore, it is no longer necessary to repeatedly communicate the measured height using a transceiver or the like to the operator of the device that pulls the weight and drops it.

Therefore, according to this embodiment, it is possible to accurately consolidate and level the underwater rubble foundation to both heights, reduce the number of working personnel, and further improve work efficiency.

[Brief explanation of drawings]

Figure 1 is an explanatory diagram of the rubble dropping position, Figure 2 is an explanatory diagram of the work procedure, Figure 3 is an explanatory diagram of the structure of the tower for suspending the weight, and Figure 4 is an explanatory diagram of the structure of the tower for suspending the weight.
The figure is an explanatory diagram of the structure of the weight, Figure 5 is an explanatory diagram of the onboard equipment, and Figure 6 is an explanatory diagram of the structure of the weight.
The figure is an explanatory diagram of the circuit configuration of a measuring device that automatically measures the height of the upper surface of rubble above the water bottom, and FIGS. 7 and 8 are diagrams explanatory of the arrangement positions of light receivers. 10--Caisson Yard 12--Seabed % formula % 30...ψ Crane ship 32 @-Crane operation room 36/No./Control panel 38... Winder 40/10-Docel 42 Mechanical pulley 44 ...Patterns 52a, 52b* a *Receiver 54...Rotation direction determination circuit 561/Microcomputer 58...Feed ■Arithmetic circuit 600 Fist/Keyboard 62...Comparison circuit 64/1 Printer special, 11th application Hitobijima Construction Co., Ltd. (:) Patent Attorney No. 2 Figure θ q, /'-14 (C) (0) 50 Figure 6 Figure 7 Figure 8

Claims (1)

[Claims] Drop and stack rubble for foundation formation on the water bottom until it exceeds the foundation plan height by a predetermined amount, and by repeatedly dropping a weight, the top surface of the rubble above the water bottom is leveled to a substantially flat surface, and above the water bottom. Repeat the dropping of the weight while adjusting the falling height of the weight until the top surface of the rubble becomes flat at the foundation plan height.Adjusting the falling height of the weight is determined by the feed rate of the wire on which the weight is suspended. A method for consolidation and leveling of underwater rubble foundations, characterized in that the work is carried out based on the measured height of a measuring device that automatically measures the top surface height of rubble above the underwater bottom.