JPS63312412A - Underwater compacting work - Google Patents
Underwater compacting workInfo
- Publication number
- JPS63312412A JPS63312412A JP14641287A JP14641287A JPS63312412A JP S63312412 A JPS63312412 A JP S63312412A JP 14641287 A JP14641287 A JP 14641287A JP 14641287 A JP14641287 A JP 14641287A JP S63312412 A JPS63312412 A JP S63312412A
- Authority
- JP
- Japan
- Prior art keywords
- ground
- construction method
- compaction
- underwater
- loading plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 claims abstract description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 230000003068 static effect Effects 0.000 claims abstract description 8
- 238000005056 compaction Methods 0.000 claims description 56
- 239000002689 soil Substances 0.000 claims description 31
- 238000010276 construction Methods 0.000 claims description 22
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 12
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 239000011150 reinforced concrete Substances 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000004576 sand Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- 238000009430 construction management Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 241001494479 Pecora Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000010297 mechanical methods and process Methods 0.000 description 1
- SYHGEUNFJIGTRX-UHFFFAOYSA-N methylenedioxypyrovalerone Chemical compound C=1C=C2OCOC2=CC=1C(=O)C(CCC)N1CCCC1 SYHGEUNFJIGTRX-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Landscapes
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Underground Or Underwater Handling Of Building Materials (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、海、河川、湖沼等の水中における盛土地盤あ
るいは埋立地盤の締固め工法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a compaction method for embankment or reclaimed ground in water such as the sea, rivers, lakes and marshes.
土の締固めとは、機械的方法によって土を圧縮し、土中
の空気間隙を減少させて土の密度を増加させることであ
り、土を締固めて密度を増してやると土の支持力が増大
し、沈下、吸水性が減少する。Soil compaction is the process of compressing soil using mechanical methods to reduce the air pores in the soil and increase the density of the soil.Compacting the soil to increase its density increases the bearing capacity of the soil. increases, sinks, and water absorption decreases.
このような目的の締固め工法は、大別すると表面締固め
工法と内部締固め工法の二種に分類される。Compaction methods for this purpose can be roughly divided into two types: surface compaction methods and internal compaction methods.
表面締固め工法とは、土質材料を薄層にまき出して転圧
するものである。内部締固め工法とは、構造物の支持力
に影響する範囲の地盤を安定させるもので、砂ぐい工法
（例えば、バイブロ・コンポーザエ法、バイブロ・フロ
テーションエ法、サンド・コンパクション・パイル工法
等。）が代表的な工法である。The surface compaction method involves spreading soil material in a thin layer and compacting it. Internal compaction methods are those that stabilize the ground in areas that affect the bearing capacity of structures, and include sand pile methods (e.g., vibro-composer method, vibro-flotation method, sand compaction pile method, etc.). ) is a typical construction method.
本発明は、表面締固め工法に属するもので、従来、水中
においてはこの工法は行われていなし）。The present invention belongs to the surface compaction method, and this method has not previously been carried out underwater).
以下に、陸上における表面締固め工法の特徴を示す。The characteristics of the surface compaction method on land are shown below.
（１）締固め械械の分類と締固め作用
締固め機械は締固めエネルギーを与える手段によって転
圧式、衝撃式、振動式の３方式のものが製作されている
が、この分類は明確なものではなく機械によっては種々
の締固め作用が複合されている。本発明もこれらのうち
転圧式を主とし、これに衝撃式が加えられたものである
。(1) Classification of compaction machines and compaction function Compaction machines are manufactured in three types depending on the means of applying compaction energy: compaction type, impact type, and vibration type, but these classifications are not clear. Rather, various compaction actions are combined depending on the machine. The present invention also mainly uses the rolling type, with the addition of the impact type.
■ 転圧方式の機械
土に静的重力作用を与えて締め固める機械であり、この
機種としてロードローラ、タイヤローラ、タンピングロ
ーラなどがある。■ Compacting machine A machine that compacts soil by applying static gravitational action. Models include road rollers, tire rollers, and tamping rollers.
ロードローラは平滑な鉄輪によって締固めを行なうもの
で、マカダム型とタンデム型とがあり、路盤や路床の締
固めに多く用いられている。含水量の高い粘性土や粒度
のそろった砂の締固めには適さない。Road rollers perform compaction using smooth iron wheels, and come in macadam type and tandem type, and are often used for compacting roadbeds and roadbeds. It is not suitable for compacting clayey soil with high water content or sand with uniform particle size.
タイヤローラは載荷重とタイヤの空気圧によって接地圧
の調節が可能であり、粘性土のように柔らかい土の締固
めには接地圧を低くし、砂利、砕石などのように堅い土
では接地圧をあげるなどの土質の堅さに応じた接地圧で
締固めができるので、最も多く使用されているが、土の
持つ支持力より低すぎる圧力で転圧を行なうと所定の密
度をうるための転圧回数が増加するので、空気圧の管理
には注意が必要である。The ground pressure of tire rollers can be adjusted depending on the loaded load and tire air pressure.The ground pressure is set low for compacting soft soil such as clayey soil, and the ground pressure is set low for hard soil such as gravel and crushed stone. This is the most commonly used method because compaction can be done using a ground pressure that is appropriate for the hardness of the soil. Since the number of air pressures increases, care must be taken in managing air pressure.
第１表は空気圧６ ｋｇ／ａＪを基準とし、空気圧を４
、３．２ｋｇ／ｃｓｌに減少させたときの施工費を比較
したものであるが、空気圧を１７３にすると転圧回数が
倍以上必要となり、施工費が２倍になっている。Table 1 is based on the air pressure of 6 kg/aJ, and the air pressure is 4 kg/aJ.
The construction cost is compared when the air pressure is reduced to 3.2 kg/csl, but when the air pressure is set to 173, the number of compactions is more than doubled, and the construction cost is doubled.
タンピングローラは鋼製の中空ドラムに羊の足のような
突起をつけたシープスフ−トローラと台形上の突起をつ
けたテーパーフロートローラとがあり、ドラム内に湿砂
、水などを入れて重量を増すことができる。一般のロー
ラが上から下へ締固めエネルギを伝達するのに対し、こ
の種のローラは内部から上方に締め固める特長を有し、
静的よりむしろ衝撃的に作用するので、深部を締め固め
、かつ層間を密にするのに有効である。また突起の先端
に荷重が集中するので、軟岩や岩塊の破砕や締固めにも
効果がある。粘性土に対しても間隙圧を消散させる効果
があるのでフィルダム工事などではよく利用されるが、
高含水比粘性土では脚間に土が付着して締固めが困難に
なることもある。Tamping rollers come in two types: sheepsfoot rollers, which have protrusions resembling sheep's feet on a hollow steel drum, and taper float rollers, which have trapezoidal protrusions. can be increased. While ordinary rollers transmit compaction energy from the top to the bottom, this type of roller has the feature of compacting from the inside upwards.
Since it acts impulsively rather than statically, it is effective in compacting deep areas and making the interlayers denser. Also, since the load is concentrated at the tip of the protrusion, it is effective in crushing and compacting soft rocks and rock blocks. It is often used in fill dam construction because it has the effect of dissipating pore pressure even in clayey soil.
In soils with high water content and specific viscosity, soil may stick between the legs, making compaction difficult.
ブルドーザは締固め機械ではないが、高含水比粘性土の
場合で一般の締固め機械の適用が困難なときや、ノリ面
の締固めに使用されることがある。Bulldozers are not compaction machines, but they are sometimes used to compact soils with high water content and specific viscosity, where it is difficult to use general compaction machines, or to compact sloping surfaces.
しかし、均一に締め固めることが困難であるので、ブル
ドーザを締固め機械として使用することは注意が必要で
ある。However, it is difficult to compact uniformly, so care must be taken when using a bulldozer as a compaction machine.
■ 衝撃方式の械械
ラン７、タンパがこの方式に属し、重錘の落下による衝
撃力を利用して、締固めを行なう方法で、他の締固め機
械によって施工できない場所の締固めに用いられる。■ Impact-type mechanical machines Run 7 and Tamper belong to this method, and are a method of compaction that utilizes the impact force caused by falling weights, and are used for compacting areas that cannot be done by other compaction machines. .
■ 振動方式の機械
この種の機械は、一般に偏心荷重を用いて縦振動を与え
る方式が多く用いられ、振動体の形式により振動ローラ
、バイブレーションコンバータ、振動タイヤローラなど
に分けられる。振動締固めの定性的性状として、振動軸
が土に与える圧力は振動数、振幅を大にすると集中荷重
となり、小にすると分布荷重になるといわれている。こ
の性状を利用して厚い層を締め固める場合には振動数、
振幅とも大にし、土の支持力が小さい場合には振動数、
振幅を小に、粘性土を締め固めるときは含水量に応じて
調節するなど材料の性質、作業の条件によって変えてい
る。振動締固め作用は土の固有振動数と加振装置に振動
数が一致するとき最大の効果が得られるとする共振説、
周期的圧縮運動−７＝
の繰返しによって締め固まるとする繰返し載荷説、振動
作用によって土の内部摩擦が減少して剪断抵抗が低下す
るので、わずかな圧力で圧縮されるとする内部摩擦の減
少説などで説明されているが、振動締固め効果は材料の
性質、作業条件によって異なるので試験施工が必要であ
る。■Vibration-type machines This type of machine generally uses an eccentric load to apply longitudinal vibration, and is divided into vibrating rollers, vibration converters, vibrating tire rollers, etc. depending on the type of vibrating body. As for the qualitative characteristics of vibration compaction, it is said that the pressure exerted on the soil by the vibrating shaft becomes a concentrated load when the frequency and amplitude are increased, and a distributed load when it is decreased. When compacting a thick layer using this property, the vibration frequency,
Increase both the amplitude and the frequency if the soil bearing capacity is small.
Changes are made depending on the properties of the material and work conditions, such as reducing the amplitude and adjusting it according to the moisture content when compacting clayey soil. The resonance theory states that the vibration compaction effect is most effective when the natural frequency of the soil and the frequency of the vibration device match.
The cyclic loading theory states that the soil is compacted by repeating periodic compression motion -7=, and the internal friction reduction theory states that the internal friction of the soil is reduced by the vibration action, lowering the shear resistance, so the soil is compacted with a slight pressure. However, as the vibration compaction effect varies depending on the properties of the material and working conditions, test construction is required.
（２）土質条件と締固め機械の適用性
締固め作業に当っては設計仕様を十分に満足するように
施工することが必要である。種々の締固め機械から締固
めの対象となる土質との関係で適切な機械を選定するに
は慎重な検討を要するが、第２表は道路およびフィルダ
ムにおける締固め機種選定の一応の目安を示したもので
ある。なお、同表のフィルダムの締固め機械については
、既設フィルダムにおける機械使用実績から最も多用さ
れている機種を選んでつけ加えたものである。(2) Applicability of soil conditions and compaction machines Compaction work must be carried out to fully satisfy the design specifications. Although careful consideration is required to select an appropriate compaction machine from among various compaction machines in relation to the soil quality to be compacted, Table 2 provides a tentative guideline for selecting compaction machines for roads and fill dams. It is something that Regarding the compaction machines for fill dams in the same table, the most commonly used models have been selected and added based on the track record of machine use in existing fill dams.
尚、第２表中※印を付したロードローラ、タイヤローラ
、自走式タンピングローラ、被牽引式タンピングローラ
が転圧式のものである。In Table 2, the road rollers, tire rollers, self-propelled tamping rollers, and towed tamping rollers marked with * are of the compaction type.
以上、陸上における表面締固め工法について示したが、
水中における同工法原理の適用は全く前例がないのが現
状である。Above, we have shown the surface compaction method on land.
At present, there is no precedent for applying the principles of this method underwater.
一方、内部締固め工法について、水中においても、陸上
と同様な工法（バイブロ・コンボーザ工法、バイブロ・
フロンテーションエ法、サンド・コンパクション・パイ
ル工法等）が実施されている。On the other hand, internal compaction methods are similar to those on land (vibro convolution method, vibro convolution method,
Frontage method, sand compaction pile method, etc.) are being implemented.
しかしながら水中において、表面締固め工法による施工
をする場合、浮力の作用によってその効率が著しく低下
するという問題点があり、このような施工はなされてい
ない。However, when performing construction using the surface compaction method underwater, there is a problem in that the efficiency is significantly reduced due to the action of buoyancy, and such construction has not been carried out.
一般には、水中地盤の締固めを必要とする場合には、全
厚まで地盤作成後、砂ぐい等の内部締固め工法が採用さ
れてきたが、この工法には次のような問題点があった。Generally, when compaction of underwater ground is required, internal compaction methods such as sand piles have been adopted after preparing the ground to its full thickness, but this method has the following problems. Ta.
■施工設備・機械が大型となり、作業条件が制約される
。■コストが高い。■複合地盤となり、地盤の使用目的
・用途によっては、不均一性が問題となる。■施工管理
が繁雑である。■Construction equipment and machinery will be larger and work conditions will be restricted. ■High cost. ■It becomes a composite ground, and depending on the purpose and use of the ground, unevenness becomes a problem. ■Construction management is complicated.
この発明の目的は、上記問題点を解消するためになされ
たもので、表面締固め工法に着目し、水中という条件下
で、静的荷重と衝撃によって表面に締固めエネルギを与
える水中締固め工法を提供することである。The purpose of this invention was to solve the above problems, and focused on the surface compaction method, and an underwater compaction method that applies compaction energy to the surface by static load and impact under underwater conditions. The goal is to provide the following.
上記の目的を達成するために、本発明の水中締固め工法
は、水中における盛土地盤あるいは埋立地盤の作成時に
、該地盤の土質に応じて、重錘の取付けられた所定形状
の載荷板を、前記地盤上に落下させ、自重による静的エ
ネルギと落下による衝撃エネルギとによって、前記地盤
を締固めることを特徴とするものである。In order to achieve the above object, the underwater compaction method of the present invention uses a loading plate of a predetermined shape to which a weight is attached, depending on the soil quality of the ground, when creating an underwater embankment or reclaimed ground. The device is characterized in that it is dropped onto the ground, and the ground is compacted by static energy due to its own weight and impact energy due to the fall.
上記の構成によると、水中での浮力に抗する十分な自重
を載荷板に与えることができるので、自重による静的エ
ネルギによって表面を締固めるとともに、載荷板の落下
高さを調整することによって土質に応じた必要な衝撃エ
ネルギ１を加えて締固ぬることができる。According to the above configuration, sufficient self-weight can be given to the loading plate to resist the buoyancy force in the water, so the surface is compacted by the static energy of the self-weight, and soil quality is improved by adjusting the falling height of the loading plate. It is possible to compact the material by applying the necessary impact energy 1 according to the amount.
更に、載荷板の形状を地盤の特性に合致したものとする
ことにより、効率的に地盤の締固めを行うことができる
。Furthermore, by making the shape of the loading plate match the characteristics of the ground, it is possible to compact the ground efficiently.
以下、本発明の実施例を図面に基いて説明する。 Embodiments of the present invention will be described below with reference to the drawings.
第１図において、作業台船１上のウィンチ２に装着され
たワイヤ３に、水中で載荷板４が吊着されている。この
載荷板４に重錘５が取り付けられている。In FIG. 1, a loading plate 4 is suspended underwater from a wire 3 attached to a winch 2 on a work barge 1. A weight 5 is attached to this loading plate 4.
図中、６は前回の締固め施工完了地盤、７は今回締固め
るまき出し層、８は水中、Ｈは落下高さである。In the figure, 6 is the previously compacted ground, 7 is the exposed layer to be compacted this time, 8 is underwater, and H is the falling height.
本実施例の載荷板４は第２図に示すように、略正方形の
鉄筋コンクリート板１０で、地盤面と接する下面には鉄
板１１がアンカー（図示せず）をとって一体的に打設さ
れており、水中で落下させるときの水圧抵抗を減少させ
るために、通水孔１２が配設されている。尚、載荷板４
の寸法としては本実施例では、厚さ約３０ａｌ＋、約５
ｍ角のものを施工現場付近で打設して製作することを想
定している。As shown in FIG. 2, the loading plate 4 of this embodiment is a substantially square reinforced concrete plate 10, and a steel plate 11 is integrally cast on the lower surface in contact with the ground surface with an anchor (not shown). A water passage hole 12 is provided in order to reduce water pressure resistance when dropping the product into water. In addition, loading plate 4
In this example, the dimensions are approximately 30al+ thick and approximately 5mm thick.
It is assumed that a m-square piece will be manufactured by pouring it near the construction site.
尚、この載荷板１０の形状、寸法、通水孔１２の有無、
あるいはコンクリート製や鉄板製、更には小型のものを
いくつか連結して使用する等、その構造は施工状況に合
わせて適宜選択される。更にワイヤ３の取付は位置や本
数、又は載荷板の懸架方法も杭打機械装置等によるなど
、種々の方法が考えられる。In addition, the shape and dimensions of this loading plate 10, the presence or absence of water holes 12,
Alternatively, the structure can be selected as appropriate depending on the construction situation, such as concrete, iron plate, or several smaller ones connected together. Furthermore, various methods can be considered for attaching the wires 3, such as the position and number of wires, and the method for suspending the loading plate, such as by using a pile driving machine or the like.
次に本実施例の作用を説明する。Next, the operation of this embodiment will be explained.
本実施例によれば、水中で地盤面７を締固める際、重錘
７を取付けた載荷板４を落下させると、表面締固めエネ
ルギは自重による静的エネルギと落下による衝撃エネル
ギによって与えられる。According to this embodiment, when the loading plate 4 to which the weight 7 is attached is dropped when compacting the ground surface 7 underwater, the surface compaction energy is given by static energy due to its own weight and impact energy due to the fall.
これを第１０図及び第１１図に示すように、陸上でのタ
イヤローラによる表面締固めの工法の作用と比較してみ
ると、タイヤローラは静的エネルギによって締固める工
法であるが、タイヤ１１の空気圧によって締固めエネル
ギの調節を行っている。即ち重量は一定にしておいて、
タイヤ１１の空気圧によって接地面積１２を調節し、単
位面積当りの締固めエネルギを調節している。第１０図
のタイヤ１１の空気圧を高くすると接地面積１２は第１
１図に示すように少くなるので、単位面積当りの荷重は
増加する。Comparing this with the surface compaction method using tire rollers on land, as shown in FIGS. The compaction energy is adjusted by air pressure. In other words, keeping the weight constant,
The ground contact area 12 is adjusted by the air pressure of the tires 11, and the compaction energy per unit area is adjusted. When the air pressure of the tire 11 in Fig. 10 is increased, the ground contact area 12 becomes the first
As shown in Figure 1, the load per unit area increases.
これに対して本実施例では、作業性の問題から重量はあ
まり変化させず、主として落下高さＨによって締固めエ
ネルギを調整しているのである。On the other hand, in this embodiment, the weight is not changed much due to workability issues, and the compaction energy is adjusted mainly by the falling height H.
本実施例によれば、水中での重量を設定し、通水孔１２
によって抵抗を減少して落下スピードを維持できるので
効率的に、水中での地盤面の締固めを行うことができる
。According to this embodiment, the weight in water is set, and the water passage hole 12
Since the falling speed can be maintained by reducing the resistance, the ground surface can be compacted effectively underwater.
そのために、例えば第８図に示すように、海中盛土地盤
を作成するときに、まき出し第１層２１まき出し第２層
２２、まき出し第３層２３と、順次、土質に応じて表面
を締固め、安定した盛土地盤を作成することができる。For this purpose, for example, as shown in Figure 8, when creating a subsea embankment, the surface is prepared in order according to the soil quality, such as the first exposed layer 21, the second exposed layer 22, and the third exposed layer 23. It is possible to compact and create stable embankment ground.
また、第９図に示すように、人工島を築造するときにも
、締切り工２４内で順次まき出し層を締固め、安定した
地盤の人工島を築造することができる。Furthermore, as shown in FIG. 9, when building an artificial island, the exposed layers are compacted one after another within the cofferdam 24, thereby making it possible to build an artificial island with stable ground.
尚、図中２５は海底、２６は施工完了地盤面を示す。In the figure, 25 indicates the seabed, and 26 indicates the completed construction ground surface.
また、他の実施例として第３図〜第７図に示すように、
載荷板４の形状を種々変えたものがある。Moreover, as shown in FIGS. 3 to 7 as other embodiments,
There are various types of loading plates 4 with various shapes.
第３図は平板状、第４図は下面に円錐又は角鍾状の突起
３１を有し、第５図はその突起３１が円柱又は角柱状を
なし、円柱状の場合は下面は第６図のように突起３１が
配設されている。第７図は棒状突起を配設したものであ
る。尚、これらの載荷板４はコンクリート製、鉄製ある
いはこれらを合わせたもの等、また突起３１のみ鉄製と
するなど地盤に適応させて種々考慮されることは勿論で
ある。3 has a flat plate shape, FIG. 4 has a conical or square-shaped protrusion 31 on the lower surface, and FIG. 5 has a cylindrical or prismatic protrusion 31. The protrusions 31 are arranged as shown in FIG. FIG. 7 shows a structure in which rod-like protrusions are provided. It goes without saying that these loading plates 4 may be made of concrete, iron, or a combination thereof, or that only the protrusions 31 may be made of iron, depending on the ground.
これらの実施例によれば、地盤の特性、水深等に応じて
効率的に地盤の締固めを行うことができる。According to these embodiments, it is possible to efficiently compact the ground according to the characteristics of the ground, the depth of the water, and the like.
上述のとおり本発明によれば、水中における盛土又は埋
立地盤の土質に応じて１重錘の取付けられた所定形状の
載荷板を落下させるので、浮力に抗して効率よく、自重
による静的エネルギと落下による衝撃エネルギとによっ
て地盤面を締固めることができる。As described above, according to the present invention, a loading plate with a predetermined shape to which a single weight is attached is dropped depending on the soil quality of the embankment or reclaimed ground in the water, so that static energy due to its own weight is efficiently absorbed against buoyancy. The ground surface can be compacted by the shock energy caused by the fall.
そのために、従来適用できなかった水中での表面締固め
工法を採用することができるので、内部締固め工法と比
較して、施工設備や機械が簡略化され、コストも低くな
り、複合地盤が防止されて使用目的や用途に応じて均一
な地盤が得られ、施工管理も容易なものとなる。For this reason, it is possible to adopt an underwater surface compaction method that could not previously be applied, which simplifies construction equipment and machinery, lowers costs, and prevents complex ground formation compared to internal compaction methods. As a result, a uniform ground can be obtained depending on the purpose and use, and construction management will be easier.
本発明の用途はきわめて広範で、例えば急増する海洋利
用の際、基本となる地盤作成工法とすることができる。The application of the present invention is extremely wide; for example, it can be used as a basic ground preparation method in the case of rapidly increasing marine utilization.
第１図は本実施例の説明図、第２図は載荷板の説明図、
第３図は他の実施例による載荷板の斜視図、第４図は更
に他の実施例による載荷板の斜視図、第５図は更に他の
実施例による載荷板の斜視図、第６図は第５図の底面図
、第７図は更に他の実施例による載荷板の斜視図、第８
図は海中盛土地盤作成の説明図、第９図は人口島築造の
説明図、第１０図及び第１１図はタイヤローラによる表
面締固め工法の説明図である。
１・・・作業台船、 ２・・・ウィンチ、３・・
・ワイヤ、 ４・・・載荷板、５・・・重錘、
６・・・締固め施工完了地盤、７・・・まき出
し層、 ８・・・水面、Ｈ・・・落下高さ。Fig. 1 is an explanatory diagram of this embodiment, Fig. 2 is an explanatory diagram of the loading plate,
3 is a perspective view of a loading plate according to another embodiment, FIG. 4 is a perspective view of a loading plate according to still another embodiment, FIG. 5 is a perspective view of a loading plate according to still another embodiment, and FIG. 6 is a bottom view of FIG. 5, FIG. 7 is a perspective view of a loading plate according to another embodiment, and FIG. 8 is a bottom view of FIG.
The figure is an explanatory diagram of the creation of the subsea embankment base, Fig. 9 is an explanatory diagram of the construction of an artificial island, and Figs. 10 and 11 are explanatory diagrams of the surface compaction method using tire rollers. 1...Work barge, 2...Winch, 3...
・Wire, 4... Loading plate, 5... Weight,
6... Compacted ground, 7... Exposed layer, 8... Water surface, H... Fall height.
Claims (11)
に、該地盤の土質に応じて、重錘の取付けられた所定形
状の載荷板を、前記地盤上に落下させ、自重による静的
エネルギと落下による衝撃エネルギとによって、前記地
盤を締固めることを特徴とする水中締固め工法。(1) When creating an underwater embankment or reclaimed ground, depending on the soil quality of the ground, a loading plate with a predetermined shape to which a weight is attached is dropped onto the ground, and the static energy due to its own weight and the energy generated by the fall are generated. An underwater compaction method characterized by compacting the ground using impact energy.
着されたワイヤ又は杭打機械装置等に吊着され、落下高
さを調整して、水中で繰返し前記地盤上に落下されるこ
とを特徴とする特許請求の範囲第１項記載の水中締固め
工法。(2) The above-mentioned load plate is suspended from a wire or pile driving machine attached to a winch on a floating work barge, and is repeatedly dropped onto the ground underwater while adjusting the falling height. An underwater compaction method according to claim 1, characterized in that:
徴とする特許請求の範囲第１項又は第２項記載の工法。(3) The construction method according to claim 1 or 2, wherein the loading plate is made of reinforced concrete.
であることを特徴とする特許請求の範囲第１項、第２項
又は第３項記載の工法。(4) The construction method according to claim 1, 2, or 3, wherein the loading plate has a substantially square or circular flat plate shape.
徴とする特許請求の範囲第１項、第２項、第３項又は第
４項記載の工法。(5) The construction method according to claim 1, 2, 3, or 4, wherein the loading plate has an iron plate on its lower surface.
徴とする特許請求の範囲第１項、第２項、第３項、第４
項又は第５項記載の工法。(6) Claims 1, 2, 3, and 4, characterized in that the load plate has a protrusion on its lower surface.
or the construction method described in paragraph 5.
の範囲第６項記載の工法。(7) The construction method according to claim 6, wherein the protrusion is made of iron.
載頭状であることを特徴とする特許請求の範囲第６項又
は第７項記載の工法。(8) The construction method according to claim 6 or 7, wherein the shape of the protrusion is a cone, a square peg, or a crest thereof.
特徴とする特許請求の範囲第６項又は第７項記載の工法
。(9) The construction method according to claim 6 or 7, wherein the shape of the protrusion is cylindrical or prismatic.
る特許請求の範囲第６項又は第７項記載の工法。(10) The construction method according to claim 6 or 7, wherein the protrusion has a rod-like shape.
されていることを特徴とする特許請求の範囲第１項ない
し第１０項のいずれかに記載の工法。(11) The construction method according to any one of claims 1 to 10, wherein the loading plate is provided with water holes for reducing hydraulic resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14641287A JPS63312412A (en) | 1987-06-12 | 1987-06-12 | Underwater compacting work |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14641287A JPS63312412A (en) | 1987-06-12 | 1987-06-12 | Underwater compacting work |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63312412A true JPS63312412A (en) | 1988-12-20 |
Family
ID=15407110
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14641287A Pending JPS63312412A (en) | 1987-06-12 | 1987-06-12 | Underwater compacting work |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63312412A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013036323A (en) * | 2011-07-12 | 2013-02-21 | Shimizu Corp | Reclamation method and mixed material for reclamation |
| JP2017193913A (en) * | 2016-04-22 | 2017-10-26 | 五洋建設株式会社 | Working ship |
| GB2595274A (en) * | 2020-05-20 | 2021-11-24 | Subsea 7 Norway As | Modifying seabed contours |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5524169U (en) * | 1978-08-04 | 1980-02-16 | ||
| JPS5545132A (en) * | 1978-09-27 | 1980-03-29 | Hitachi Ltd | Access control system of magnetic disk memory unit |
| JPS5826109A (en) * | 1981-08-11 | 1983-02-16 | Kaiyo Kogyo Kk | Compaction work for soft ground |
-
1987
- 1987-06-12 JP JP14641287A patent/JPS63312412A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5524169U (en) * | 1978-08-04 | 1980-02-16 | ||
| JPS5545132A (en) * | 1978-09-27 | 1980-03-29 | Hitachi Ltd | Access control system of magnetic disk memory unit |
| JPS5826109A (en) * | 1981-08-11 | 1983-02-16 | Kaiyo Kogyo Kk | Compaction work for soft ground |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013036323A (en) * | 2011-07-12 | 2013-02-21 | Shimizu Corp | Reclamation method and mixed material for reclamation |
| JP2017193913A (en) * | 2016-04-22 | 2017-10-26 | 五洋建設株式会社 | Working ship |
| GB2595274A (en) * | 2020-05-20 | 2021-11-24 | Subsea 7 Norway As | Modifying seabed contours |
| GB2595274B (en) * | 2020-05-20 | 2023-07-05 | Subsea 7 Norway As | Modifying seabed contours |
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