JP3295809B2 - Weight free fall type underwater rubble foundation consolidation leveling method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a method of free-falling underwater rubble foundation for consolidating weights.

[0002]

2. Description of the Related Art A conventional free-fall type underwater rubble foundation consolidation method involves the construction of breakwaters, quays, etc., in which rubble is deposited and deposited at a height higher than the planned top of the underwater rubble foundation (in other words, The top of the submerged rubble foundation is compacted by free-falling the weight lifted by a crane boom to consolidate it. This method is said to be effective and economical.

[0003] The construction method is, as shown in FIG.
The crane boom 2 mounted on the underwater rubble foundation 3 is extended and supported in the width direction of the underwater rubble foundation 3, that is, in a direction perpendicular to the longitudinal direction (arrow α) of the underwater rubble foundation 3, and the boom tip is extended along the length of the underwater rubble foundation 3. While moving along the arc line in the direction (arrow α), the free fall of the weight 4 is repeatedly performed at each part, and for example, the compaction pressure of the work area F1 is performed over the entire area. Work area F
The process shifts to a similar compacting operation in Step 2.

In this case, the rubble piled up in each of the work areas F1 and F2 is compacted downward and radially by the compaction action of the weight 4, but at the planned crown height. The surplus rubble 5 that remains even after consolidation to the height H is wrinkled and moved in the turning direction of the crane boom 2 and, in the above case, streaks at the boundary between the two working areas F1 and F2.

[0005] For this reason, it is desirable that the above-mentioned extra height be provided in an exact amount under strict control. However, as a practical matter, the rocking of the work boat 1 due to waves, undulations and the like at the time of stoning. However, it is difficult to accurately perform a necessary and sufficient amount of extra asperity, and therefore, there is a disadvantage that consolidation cannot be efficiently performed.

The applicant of the present invention has proposed a weight free fall type underwater rubble foundation consolidation method described in Japanese Patent No. 2893527 for the purpose of solving such a drawback.

[0007] As shown in FIG. 6, this construction method is applied to each boundary portion of a plurality of work areas F1, F2,..., Which are sequentially partitioned in the longitudinal direction (arrow α) of the underwater rubble foundation. 3 are formed so as to travel in the width direction, and the crane boom 2 of the work boat 1 is extended and supported in the width direction of the submersible rubble foundation 3 in each of the work areas F1, F2,. While moving along the arc in the longitudinal direction (arrow α) of the underwater rubble foundation 3, the free fall of the weight 4 suspended on the crane boom 2 is repeatedly performed at each part to perform the compaction work. The content is to level the consolidation to the planned top height H, wrinkle and accumulate the remaining excess rubble 5 in the adjusting grooves 6...

[0008]

However, according to the method disclosed in the above-mentioned Japanese Patent No. 2893527, although it is possible to prevent the occurrence of excessive rubble stones 5 from rising, the adjustment groove 6 can be prevented.
.. Must be formed at each boundary of the working area of the underwater rubble foundation 3, and the construction of the underwater rubble foundation 3 is troublesome.

Further, the excess rubble 5 is removed from the adjusting grooves 6.
It is necessary to pile and wrinkle them, and it is necessary to roll them by the weight 4 each time, so that the rolling work becomes complicated.

The present invention makes it possible to easily carry out the construction of an underwater rubble foundation in which no extra rubble is generated and the work of compacting the same, and it is possible to finish a high-quality underwater rubble foundation in a free-fall type underwater type. The aim is to provide a method of leveling rubble foundation.

[0011]

According to the present invention, there is provided a weight body according to the present invention.
The free-fall type underwater rubble foundation consolidation method has the following configuration.
You. (1) The top which is almost the same as the planned top height H of the underwater rubble foundation A
The rubble foundation body A 'of the height is thrown from the work boat 1
To form. (2) A plurality of rubble piles on the top of the rubble foundation body A '
A1 to a5, b1 to b5, c1 to c5, d1 to d5, e1 to e
5, f1 to f5,...
Disposal of grab buckets suspended from the crane boom 1
By the stone depositing means 7, the top of the rubble foundation body '
To release the rubble, and at the same time
The pressure of the weight 4 against the stake and the spread around it
The above measurement is based on the coking pressure of the same weight 4 against the rubble to be scraped.
The total amount of rubble to be used as the foundation for underwater rubble at the top edge H
To be formed in the amount distributed to the stone pile. (3) After that, the free fall of the weight 4 should be repeatedly performed.
And the pressing of
In addition, rubble stones spread around due to the consolidation pressure
Consolidation so that the underwater rubble foundation A is at the planned top height H
Leveling.

The invention of claims 2 to 4 is characterized in that the rubble foundation body A '
Is the same as or higher than the planned crown height H of the underwater rubble foundation A
Claims formed with slightly lower or slightly higher top height
Item 1: Free-fall type underwater rubble foundation described in item 1
is there.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below. First, rubble is thrown in from the work boat 1 in accordance with the custom, and as shown in FIG. 1, the rubble foundation main body A ′ having the same top height H as the planned top height H of the underwater rubble foundation A is shown in FIG.
To form At this time, the compaction work on the rubble foundation body A 'is not performed.

Next, as shown in FIGS. 1 and 2, on the top end of the rubble foundation main body A ', a plurality of rubble piles a1 to a5, b1 to b5, and c1 to c5 each having a required amount of rubble. , D1-d
The elongation direction α and the width direction β of the rubble foundation main body A ′ are obtained by means of rubble accumulation means 7 such as grab buckets suspended from the crane boom 2 of the work boat 1 by using 5, e1 to e5, f1 to f5,.
Are formed at required intervals, for example, 2 m intervals.

Specifically, the work boat 1 is fixed at a required position with a ship steering anchor 8 or the like, and as shown in FIG. 1, the rubble depositing means 7 is suspended at a position near the top end of the rubble foundation main body A '. After adjusting the hanging position and the like in a state where the rubble stone is lowered and lower than the height of the rubble stone pile, the rubble stone held by the rubble pile 7 is released to release the rubble stone pile. Is deposited.

Each of the extra rubble stones is used to determine the crushing pressure caused by repeatedly performing the free fall of the weight 4 and the above-mentioned extra rubble stones a1 to a1.
a5, b1 to b5, ..., and on the rubble spread around by the compaction pressure,
The total amount of rubble with the underwater rubble foundation A having the above-mentioned planned crown height H is made up of rubble in an amount distributed to each rubble pile.

The above-mentioned stacking operation is performed while the crane boom 2 is rotated to the right and left and moved up and down as appropriate, so that the above-mentioned extra rubble a1 to a5, b1 to b5, c1 to c5, d1 to d5, e1 to e5,
f1 to f5,... are sequentially formed.

As shown in FIG. 3, first, the free fall of the weight 4 hung on the crane boom 2 is performed on the excess rubble a1 to a5 from the excess rubble a3 at the center. Rubble pile a2, deposited on both sides of this
After moving while moving in the order of a1, a4, and a5, the process proceeds by repeatedly performing the rubble that has been diffused between the extra rubbles a1 to a5.

By repeatedly performing the free fall of the weight 4, the excess rubble a1 to a5 is gradually consolidated and diffused to the surroundings, and the rubble is tightly engaged with the rubble.

[0020] Such a compaction operation is carried out by using excess rubble b1 ~
For b5, c1 to c5,...
By performing in the same order as in the case of 5, as shown in FIG. 4, an underwater rubble foundation A having a planned top height H can be constructed.

The present invention is not limited to the above-described embodiment, but can be modified as follows. In the above, the example of forming the rubble foundation body with the same top height as the planned top height of the submerged rubble foundation was described, but the invention is not limited to this, and the top height of the rubble foundation body is set according to the above plan. It can be built slightly lower than the top and slightly higher.

In each of these cases, the excess rubble pile is applied to each of the excess rubble stones by repeatedly performing free fall of the weight as in the above case. By performing it on the rubble that has spread to the surrounding area, the total amount of rubble that the underwater rubble foundation has at the above-mentioned planned crown height is composed of the amount of rubble that is distributed to each of the rubble stones.

[0023]

According to the first to fourth aspects of the present invention, the following effects can be obtained. Form a rubble foundation body with a crown height almost equal to the planned crown height of the underwater rubble foundation,
On the top of the rubble foundation body, a plurality of rubble piles consisting of the required amount of rubble at the required top height of the underwater rubble foundation are formed at the required interval from each other by the pressing of the underwater rubble foundation. No extra rubble is created.

Further, since no extra rubble is generated, it is not necessary to form an adjusting groove as in the prior art on the underwater rubble foundation. In addition, extra rubble is crumpled and deposited in the adjusting groove, and the rubble is accumulated by the weight. Since there is no need to compact, the construction of the underwater rubble foundation can be easily performed.

Furthermore, since each rubble pile is piled up in a state in which rubble pile means such as a grab bucket suspended on a crane boom of a work boat are suspended at a position near the top end of the rubble foundation body, waves are formed. Less susceptible to rocking of the work boat due to undulations, etc., so that each of these extra rubble piles can be accurately formed at the required position on the rubble foundation main body and made of an appropriate amount of rubble without excess or deficiency. .

[Brief description of the drawings]

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a front view of a main part for describing a submerged rubble foundation consolidation leveling method of the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a side view of a main part for describing a rolling operation by repeatedly performing free fall of a weight.

FIG. 4 is a side view of a main part of an underwater rubble foundation formed by equalizing the compaction.

FIG. 5 is a side view of a main part showing a conventional underwater rubble foundation consolidation leveling method.

FIG. 6 is a plan view of a main part showing a state in which a consolidation leveling method is performed on a conventional underwater rubble foundation having an adjustment groove.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Work boat 2 Crane boom 4 Weight 7 Gravity stone accumulation means such as grab buckets a, b, c, d, e, f ... Extra rubble stone A Underwater rubble stone foundation A 'Rip stone foundation body H Planned top height

Claims (4)

(57) [Claims] 1. A rubble foundation body having a top height substantially equal to the planned top height of an underwater rubble foundation is formed by inputting rubble from a work boat, and a plurality of rubble piles are provided on the top of the rubble foundation body. At a required interval from each other, the rubble is released at a position close to the top end of the rubble foundation body by rubble accumulation means such as a grab bucket suspended on a crane boom of the work boat, and furthermore, each of the rubble excess The total amount of rubble used as the foundation for underwater rubble at the above-designed crown height is determined by the amount of rubble that is distributed to each rubble as a result of the compaction pressure by the weight of Then, forming, and thereafter, the compaction pressure by repeatedly performing the free fall of the weight is performed on the excess pile of each rubble, and also on the rubble spread around by the compaction pressure, Underwater rubble foundation Tentan weight free-fall water riprap foundation consolidation smoothing method characterized by leveling compacted so that the height. 2. A contracting method wherein the rubble foundation body is formed at the same top height as the planned top height of the underwater rubble foundation.
The weight free fall type underwater rubble foundation consolidation leveling method according to claim 1. 3. The free-fall type underwater rubble foundation according to claim 1, wherein the rubble foundation body is formed at a ceiling height slightly lower than a planned ceiling height of the underwater rubble foundation. Shi construction method. 4. The weight-free fall type underwater rubble foundation consolidation uniform according to claim 1, wherein the rubble foundation body is formed with a ceiling height slightly higher than a planned top height of the underwater rubble foundation. Shi construction method.