JPH0347313A - Pc concrete sheet pile and its driving - Google Patents
Pc concrete sheet pile and its drivingInfo
- Publication number
- JPH0347313A JPH0347313A JP18023289A JP18023289A JPH0347313A JP H0347313 A JPH0347313 A JP H0347313A JP 18023289 A JP18023289 A JP 18023289A JP 18023289 A JP18023289 A JP 18023289A JP H0347313 A JPH0347313 A JP H0347313A
- Authority
- JP
- Japan
- Prior art keywords
- sheet pile
- concrete
- pipe
- pipe material
- tip
- 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.)
- Granted
Links
- 239000000463 material Substances 0.000 claims abstract description 104
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 54
- 239000010959 steel Substances 0.000 claims abstract description 54
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 41
- 238000000034 method Methods 0.000 claims abstract description 20
- 239000000945 filler Substances 0.000 claims abstract description 10
- 239000004576 sand Substances 0.000 claims description 9
- 238000004873 anchoring Methods 0.000 claims description 6
- 239000002689 soil Substances 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000002184 metal Substances 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Landscapes
- Bulkheads Adapted To Foundation Construction (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は港湾構造物、河川護岸、下水道土留擁壁等に使
用され、ウオタージエツトを使用して打込まれるＰＣコ
ンクリート矢板の打込み工法および当該工法に用いられ
るＰＣコンクリート矢板に関する。Detailed Description of the Invention (Field of Industrial Application) The present invention is used for port structures, river revetments, sewer retaining walls, etc., and a method for driving PC concrete sheet piles using a water jet, and the method. This invention relates to PC concrete sheet piles used for.
（従来の技術）
ＰＣコンクリート矢板は現場の土質条件がシルト、粘土
、砂質土壌、あるいは砂礫等の場合に使用され、ウオタ
ージエツトを使用して打込まれる場合が多い。(Prior Art) PC concrete sheet piles are used when the soil condition at the site is silt, clay, sandy soil, gravel, etc., and is often driven using a water jet.
この種従来ＰＣコンクリート矢板（以下単にＰＣ矢板と
いう）の−例の断面構造を第２図（ａ）に、また従来の
打込み時状態を第２図（ｂ）に示す。The cross-sectional structure of an example of this kind of conventional PC concrete sheet pile (hereinafter simply referred to as PC sheet pile) is shown in FIG. 2(a), and the conventional state at the time of driving is shown in FIG. 2(b).
同図（ａ）における１００は断面が波形を呈し。100 in the same figure (a) has a wave-shaped cross section.
主鋼材としてＰＣ鋼線を用いた従来ＰＣ矢板であり、１
１はコンクリート １２は主鋼材、１３は副鋼材、１４
は組立鋼材である。上記主鋼材１２および副鋼材１３は
要求される強度に対応した矢板の種別１寸法によって埋
設本数や鋼材径が異なる。It is a conventional PC sheet pile using PC steel wire as the main steel material, 1
1 is concrete, 12 is main steel material, 13 is secondary steel material, 14
is an assembled steel material. The number and diameter of the main steel material 12 and the secondary steel material 13 to be buried differ depending on the type and size of the sheet pile corresponding to the required strength.
同図（ｂ）は打込み時にバイブロハンマーを使用する場
合であり、ＶＨはバイブロハンマー、ＣＨは上記バイブ
ロハンマーＶＨの下部に固定されたＰＣ矢板１００把持
用のチャック、ＧおよびＲは打ち込み時にＰＣ矢板１０
０を位置決め案内する導枠および引き寄せロール、ＷＪ
はウオタージエツト・ユニットである。Figure (b) shows the case where a vibrohammer is used during driving, where VH is a vibrohammer, CH is a chuck for gripping 100 PC sheet piles fixed to the lower part of the vibrohammer VH, and G and R are PC sheet piles during driving. 10
Guide frame and pull roll to position and guide 0, WJ
is a water jet unit.
而して、ウオタージエツト・ユニットＷＪはＰＣ矢板１
００の全長とほぼ同じ長さの高圧パイプＰを２例えば第
１図（ａ）に示す如＜、ＰＣ矢坂１００の所定複数位置
それぞれの表面添いに頂端面から下垂させ、図示しない
ウオタージエツト・ポンプから送給される高圧水をホー
ス２．ニップル３．雌エルボからなるジヨイント４を介
して上記高圧パイプＰへ導入し、当該高圧パイプＰの先
端に装着したジェットノズル５からウオタージエッＩ−
Ｊを噴射させる構成である。Therefore, the water jet unit WJ is PC pile 1.
Two high-pressure pipes P having approximately the same length as the total length of PC Yasaka 100 are hung down from the top end surface along the surface of each of a plurality of predetermined positions of PC Yasaka 100, for example as shown in FIG. High-pressure water is supplied through hose 2. Nipple 3. The water jet I- is introduced into the high-pressure pipe P through a joint 4 consisting of a female elbow, and from a jet nozzle 5 attached to the tip of the high-pressure pipe P.
It is configured to inject J.
通例の施工法は、まずＰＣ矢板打ち込み位置にパイロッ
ト鋼矢板を建て込み、かつこれを引き抜いて導孔を形成
する。次ぎに図示の如くウオタジェット・ユニットＷＪ
を装着したＰＣ矢板１００を相隣るＰＣ矢板１００どう
しの側面凹部と凸部とがそれぞれ嵌合しあう状態として
、先端を上記導孔の開口上方に位置決めする。この状態
でウオタージエツト・ポンプを駆動して高圧水を高圧バ
イブＰへ送給し、ジェットノズル５からウオタージエツ
トＪを噴射させて打込み先である導孔周囲の土砂を軟弱
化・排除しつつ、ＰＣ矢板１００自体の自重と駆動開始
としたバイブロハンマーＶＨの振動による前進駆動力と
を介して順次溝孔に従って打込むようにしている。The usual construction method is to first erect a pilot steel sheet pile at the position where the PC sheet pile will be driven, and then pull it out to form a guide hole. Next, as shown in the diagram, the water jet unit WJ
The PC sheet piles 100 equipped with the PC sheet piles 100 are placed in a state where the concave portions and convex portions of the side surfaces of the adjacent PC sheet piles 100 are fitted into each other, and the tips are positioned above the opening of the guide hole. In this state, the water jet pump is driven to supply high-pressure water to the high-pressure vibrator P, and the water jet J is injected from the jet nozzle 5 to soften and remove the earth and sand around the guide hole, which is the driving destination, and to remove the PC sheet pile. The balls are driven sequentially into the slots using the weight of the tool 100 itself and the forward driving force generated by the vibration of the vibrohammer VH that starts the drive.
（従来技術に存する問題点）
従来工法では、ＰＣ矢板打込み前のパイロット鋼矢板の
建て込みと引き抜きにより導孔を形成する前工程を必要
とし、これがために要する設備が工事費を高騰させると
ともに、工程が複雑で極めて煩雑であった。(Problems with conventional technology) Conventional construction methods require a pre-process of forming guide holes by building and pulling out pilot steel sheet piles before driving the PC sheet piles, and the equipment required for this increases construction costs. The process was complicated and extremely complicated.
それのみならず、従来ウオタージエツト・ユニッ１−Ｗ
Ｊでは、複数本の高圧パイプＰをＰＣ矢扱１００の表面
添いに下垂させ、ウォタージェットＪを導孔周囲の土砂
に向けて噴射する構成であるので、打込み中のジェット
ノズル５の前面に２例えば礫あるいは硬質土塊があり、
これ等が沈入中のＰＣ矢板１００と下垂された高圧パイ
プＰとの間に介入した場合など、高圧パイプＰがＰＣ矢
板１００の表面から遊離して高圧水の噴射方向が偏向し
、偏向方向の土砂を軟弱化・排除するので、たとえ導孔
が孔設されていてもＰＣ矢板１００が抵抗の少ない方向
へ沈入しがちとなり、垂直に打ち込まれないという事態
が時々発生する。この場合には、ＰＣ矢板１００を一度
吊り上げ後退させ、ＰＣ矢板１００の表面から離間した
高圧パイプＰを再び表面に添わせ直しするなどの措置を
とらねばならなかった。Not only that, but also the conventional water jet unit 1-W
In J, a plurality of high-pressure pipes P are hung down along the surface of the PC arrow handle 100, and the water jet J is injected toward the earth and sand around the guide hole. For example, there are gravel or hard earth clods,
If these things intervene between the PC sheet pile 100 that is sinking and the high-pressure pipe P that is hanging down, the high-pressure pipe P will be separated from the surface of the PC sheet pile 100, and the direction of high-pressure water jetting will be deflected. Even if guide holes are provided, the PC sheet piles 100 tend to sink in the direction of least resistance, and sometimes the PC sheet piles 100 are not driven vertically. In this case, it was necessary to take measures such as lifting the PC sheet pile 100 once and moving it back, and then aligning the high pressure pipe P separated from the surface of the PC sheet pile 100 with the surface again.
また、上記第２図（ｂ）では高圧パイプＰを３本使用し
た例を示しているが、実際上はさらに多数本を使用する
場合が多（、打込み前の段取りとして多数本の高圧パイ
プＰをＰＣ矢板１００表面添いにうまく取りつけたり、
打込み後には後工程として土中から高圧パイプＰを引抜
かねばならず、現場作業は煩雑であり、作業性に欠ける
として改善策が望まれていた。In addition, although Fig. 2(b) above shows an example in which three high-pressure pipes P are used, in reality, many more are often used (as a setup before driving, a large number of high-pressure pipes P are used). Attach it well to the surface of PC sheet pile 100,
After driving, the high-pressure pipe P must be pulled out of the soil as a post-process, which makes on-site work complicated and lacks workability, and improvements have been desired.
（発明の目的）
本発明はウオタージエツトを使用して打込まれる従来Ｐ
Ｃコンクリート矢板打込み工法およびこれに用いられる
ＰＣコンクリート矢板に存する上述した問題点を解消す
るため、さらには必要に応じてより強度の高い構築物に
変更するためになされたもので、直進的な打込みの確実
性と容易性とを確保しつつ、工程の簡略化、現場作業性
の単純化を可能とするとともに、何等かの理由で必要が
生じた場合に打込み後の矢板の剪断耐力の追増が可能で
あり、また擁壁等の根の形成が可能なＰＣコンクリート
矢板打込み工法およびこれに用いるＰＣコンクリート矢
板を提供することを目的とする。(Object of the Invention) The present invention is directed to a conventional P drill that is driven using a water jet.
This was done in order to solve the above-mentioned problems with the C concrete sheet pile driving method and the PC concrete sheet pile used therein, and also to change to a stronger structure if necessary. While ensuring reliability and ease, it simplifies the process and simplifies on-site workability, and if the need arises for some reason, it is possible to increase the shear strength of the sheet pile after driving. An object of the present invention is to provide a PC concrete sheet pile driving method that is possible and also allows the formation of roots for retaining walls, etc., and the PC concrete sheet piles used therein.
（第１発明の構成）
本願第１発明の構成は、
（１）高圧水導通用パイプ材が先端所定範囲を除くほぼ
全長外周をアンボンド状態としてコンクリート内所定位
置の主鋼材に替えて軸線方向に貫通。(Configuration of the first invention) The configuration of the first invention of the present application is as follows: (1) The pipe material for high-pressure water conduction is placed in an axial direction in place of the main steel material at a predetermined position in concrete with almost the entire length outer circumference, excluding a predetermined range at the tip, in an unbonded state. Penetration.
埋設されているＰＣコンクリート矢板を用い、（２）当
該矢板を、その軸線が打込み方向を指向する状態、かつ
上記パイプ材の矢板頂頭側開端面から管内に高圧水を送
給して先端側管端からジェットとして噴出させつつ先端
を直接打込み位置土砂表面に当接・位置決めし、
（３）上記ジェット射衝部に向かって矢板の自重と当該
矢板に付加する所定前進駆動力とを介して打込み、
（４）ついで上記パイプ材を矢板先端側コンクリート内
に設けた碇着部を介して頂頭側から緊張、定着してコン
クリートへプレストレスを導入したのち、
（５）パイプ材の管内に充填材を圧入することを特徴と
するＰＣコンクリート矢板打込み工法にある。Using the buried PC concrete sheet pile, (2) place the sheet pile in a state where its axis is oriented in the driving direction, and feed high-pressure water into the pipe from the open end on the top side of the sheet pile of the pipe material to create a tip side pipe. The tip is directly contacted and positioned on the earth and sand surface at the driving position while ejecting it as a jet from the end, and (3) driving the sheet pile toward the jet impacting section using the own weight of the sheet pile and a predetermined forward driving force applied to the sheet pile. , (4) Next, the pipe material is tensioned and fixed from the top side through the anchoring part provided in the concrete at the tip of the sheet pile to introduce prestress into the concrete, and (5) filler material is placed inside the pipe material. The PC concrete sheet pile driving method is characterized by press-fitting.
（第１発明の作用）
従来工法がウオタージエツトを導孔周囲の土砂に向けて
噴射して軟弱化・排除するのに対し、本願第１発明の方
法は、コンクリート矢板打込み直前方向の土砂に向けて
噴射して軟弱化・排除するので、従来の如き矢板打込み
位置に予めパイロット鋼矢板を建て込み、引き抜いて導
孔を形成する前工程を不要とする作用、矢板の打込み方
向である前方が確実に打込みに対する低い抵抗力を示す
ので、直進的かつ容易な打込みを可能とする作用、およ
び従来の如き矢板打込み前に多数本の高圧パイプを矢板
表面添いに取りつける段取り作業や。(Function of the first invention) While the conventional construction method injects water jet toward the earth and sand around the guide hole to soften and eliminate it, the method of the first invention of the present application injects the water jet toward the earth and sand immediately before driving the concrete sheet pile. Since it is injected to soften and eliminate the steel sheet pile, it eliminates the need for the previous process of erecting the pilot steel sheet pile in advance at the sheet pile driving position and pulling it out to form a guide hole, as in the conventional method, and ensures that the forward direction, which is the driving direction of the sheet pile, is unnecessary. Since it exhibits a low resistance to driving, it has the effect of allowing straight and easy driving, and the setup work of attaching a large number of high-pressure pipes along the sheet pile surface before driving the sheet pile as in the past.
打込み後に高圧パイプを土中から引き抜く現場作業を不
要とする作用、さらにはパイプ材の管内に圧入する充填
材はパイプ材自体の防錆と合わせて矢板先端側の土砂中
に浸透して矢板の根を形成して構築物の強靭性を向上す
る作用がある。This function eliminates the need for on-site work to pull out the high-pressure pipe from the soil after driving, and the filler press-fitted into the pipe material not only prevents the pipe material itself from rusting, but also penetrates into the earth and sand at the tip of the sheet pile, causing damage to the sheet pile. It has the effect of forming roots and improving the strength of the structure.
また、本発明では通常の場合、コンクリートへのボスト
テンションによるプレストレス導入を矢板製造時の各主
鋼材の強度に対応したプレテンションによる導入プレス
トレスと同等のプレストレスを導入すべく、各パイプ材
を所定の緊張力で牽引し、定着してプレストレスを補完
することで当該矢板を規格に適合させるが、引張強度の
高いパイプ材を使用している場合には、必要に応じてプ
レストレスの追増をも可能とする作用がある。In addition, in the present invention, in order to introduce prestress equivalent to the prestress introduced into concrete by pretension corresponding to the strength of each main steel material at the time of manufacturing sheet piles, in the normal case, each pipe material The sheet pile is pulled under a predetermined tension, fixed, and supplemented with prestressing to make the sheet pile comply with the standards. However, if pipe materials with high tensile strength are used, prestressing may be applied as necessary. It also has the effect of making additional additions possible.
（第２発明の構成）
而して、本願第１発明工法に用いられるコンクリート矢
板の構造に関する本願第２発明の要旨は、（ａ）ウオタ
ージエツトを用いて打込まれるＰＣコンクリート矢板が
、
（ｂｌコンクリート中に埋設される主鋼材群中の所定位
置主鋼材に替えてほぼ全長外周をアンボンド状態とされ
たパイプ材を配置し、
（Ｃ）かつ当該パイプ材をコンクリートを貫通させて矢
板の頂ＨＪＩ端面および先端端面に開口せしめ、（ｄ）
先端部近傍のコンクリート中にパイプ材碇着部を設け、
（ｅｌパイプ材の先端部がその管内に通水される高圧水
をジェット噴射可能に構成されていることを特徴とする
コンクリート矢板にある。(Structure of the second invention) Therefore, the gist of the second invention of the present application regarding the structure of the concrete sheet pile used in the construction method of the first invention of the present application is that (a) the PC concrete sheet pile that is cast using a water jet is (bl concrete (C) In place of the main steel material at a predetermined position in the group of main steel materials to be buried inside, a pipe material with almost the entire length outer circumference in an unbonded state is placed. and an opening at the tip end surface, (d)
A concrete sheet pile is characterized in that a pipe anchoring part is provided in the concrete near the tip part, and the tip part of the pipe material is configured to be able to jet high-pressure water flowing into the pipe. .
（実施例）
本願第２発明を第１図（ａ）〜（ｃ）に示す実施例に従
って以下に詳述する。(Example) The second invention of the present application will be described in detail below according to the example shown in FIGS. 1(a) to (c).
第１図（ａ）は波形を呈し、主鋼材にＰＣ鋼線を用いた
本発明実施例ＰＣ矢板１０の断面を示し、ｌｌはコンク
リート、１２は主鋼材、１３は副鋼材、１４は組立鋼材
であり、これらの要素は従来同様であるが、本発明では
主鋼材１２の本数が従来ＰＣ矢板１００の断面を示す第
２図の（ａ）と対比すれば即座に判明する如く少なくな
っており、主鋼材群中の所定位置の主鋼材が１５ａ〜１
５ｆとして示す中空のパイプ材に置き替わっている。FIG. 1(a) shows a cross section of a PC sheet pile 10 according to an embodiment of the present invention, which has a corrugated shape and uses PC steel wire as the main steel material, where 11 is concrete, 12 is the main steel material, 13 is the secondary steel material, and 14 is the assembled steel material. These elements are the same as before, but in the present invention, the number of main steel members 12 is reduced as will be immediately apparent when compared with FIG. 2 (a) showing the cross section of the conventional PC sheet pile 100. , the main steel material at a predetermined position in the main steel material group is 15a to 1
It has been replaced by a hollow pipe material shown as 5f.
当該ＰＣ矢板ｌＯには、勿論製造時、プレテンシランに
より使用されている主鋼材１２の規格に応じた緊張力を
介してコンクリートｌｌへの所定プレストレス導入が行
われている。Of course, at the time of manufacture, a predetermined prestress is introduced into the concrete 10 of the PC sheet pile 10 by applying a tension force according to the standard of the main steel material 12 used by pretensilane.
当該パイプ材１５ａ〜１５ｆそれぞれは、 ＰＣ矢板
ｌＯの先端部所定範囲を除く外周全長にアンボンド材が
塗布されており、第１図（ｂ）に示す如＜、ＰＣｃ板１
０の頂頭端面コンクリートＡより所定長さ裸出している
。当該裸出部それぞれには端部から所定長さ範囲９例え
ば３０〜４０ｍｍにわたり雄ねじ部１６が形成されてい
て、ウオタージエツト・ポンプと導通する管路の先端に
位置する接続金具の雌ねじと螺合可能である。従って、
現場では接続金具をパイプ材１５ａ〜１５ｆそれぞれに
螺着させるだけで打込み段取りは終了する。Each of the pipe materials 15a to 15f is coated with an unbonding material over the entire length of the outer periphery except for a predetermined range at the tip of the PC sheet pile 10, and as shown in FIG.
A predetermined length is exposed from the concrete A on the top end surface of No. 0. A male threaded portion 16 is formed in each of the exposed portions over a predetermined length range 9, for example, 30 to 40 mm from the end, and can be screwed into the female thread of a connecting fitting located at the tip of a conduit that communicates with the water jet pump. It is. Therefore,
At the site, the driving setup is completed simply by screwing the connecting fittings onto each of the pipe materials 15a to 15f.
また、パイプ材１５ａ−１５ｆそれぞれは、第１図（Ｃ
）に示す如＜、ＰＣｃ板１０の先端端面コンクリートＢ
より所定長さ裸出している。当該裸出部それぞれには端
部から所定長さ範囲１例えば２０〜３０ｍｍにわたり雄
ねじ部１７が形成されていて、ウオタージエ′ットノズ
ルの雌ねじと螺合可能である。従って、当該ＰＣ矢矢板
ｌ製製造時使い捨てウオタージエツトノズルを装着して
出荷すれば、現場での作業はなくなる。In addition, each of the pipe materials 15a to 15f is shown in FIG.
) As shown in <, the tip end face concrete B of the PCc board 10
A predetermined length is exposed. A male threaded portion 17 is formed in each of the exposed portions over a predetermined length range 1, for example, 20 to 30 mm from the end, and can be screwed into the female thread of the water jet nozzle. Therefore, if the disposable water jet nozzle made by the PC sheet pile is installed and shipped during manufacturing, there will be no on-site work.
さらに、この裸出部に上記の如き雄ねじ部１７を形成せ
ず、第１図（ｄ）に示すように１例えばスェージング加
工等でその先端の管内径を先細のテーパー状に形成して
開口を小さくし、当該部分をノズル部１８としてもよい
。Furthermore, instead of forming the above-mentioned male threaded part 17 on this exposed part, the inner diameter of the pipe at the tip is formed into a tapered shape by swaging, etc., to form an opening, as shown in FIG. 1(d). It is also possible to reduce the size and use this portion as the nozzle portion 18.
パイプ材１５それぞれの、上述したアンボンド材が塗布
されていない先端部分には第１図（ｄ）に１９として示
す碇着部を備えている。尚、図における２０はアンボン
ド剤である。An anchoring portion shown as 19 in FIG. 1(d) is provided at the tip end portion of each pipe material 15 to which the above-mentioned unbonding material is not applied. Note that 20 in the figure is an unbonding agent.
而して、パイプ材１５としては少なくとも中実の主鋼材
１２と強度および断面積がほぼ同一のものが使用される
。具体的数値例を挙げて説明すれば、例えば主鋼材１２
の引張強さが９５ Ｋｇｆ／ｍｍ２で、直径がφ１２．
７ｍｍであれば、同一強度を備える外径φ１７ｍ５＋、
肉厚３１Ｉｌｌのパイプ材１５が使用される。パイプ材
１５の肉厚が３ｍｍ程度あれば、ＰＣ矢板製造過程のコ
ンクリートの膨脹力に拮抗し得、かつ管内に流通させる
高圧水（１５０に８７ｃｍ２）に対しても充分な耐力を
備え、かつ通水時に管径が殆ど膨脹することはない。ま
た些少膨脹があったとしても、外周全長に塗布されたア
ンボンド材が管径の膨脹を吸収するので、管径の膨脹。As the pipe material 15, a material having substantially the same strength and cross-sectional area as at least the solid main steel material 12 is used. To explain with specific numerical examples, for example, main steel material 12
The tensile strength is 95 Kgf/mm2, and the diameter is φ12.
If it is 7mm, the outer diameter φ17m5+ with the same strength,
A pipe material 15 with a wall thickness of 31 Ill is used. If the wall thickness of the pipe material 15 is approximately 3 mm, it will be able to withstand the expansion force of concrete during the manufacturing process of PC sheet piles, and will also have sufficient resistance against high-pressure water (87 cm2 for 150) flowing inside the pipe, and will be able to withstand water flow through the pipe. The pipe diameter hardly expands when it is in water. Also, even if there is a slight expansion, the unbonded material applied to the entire length of the outer circumference absorbs the expansion of the tube diameter, so the tube diameter expands.
収縮に起因するコンクリートのひび割れは防止可能であ
る。Cracks in concrete due to shrinkage are preventable.
また、コンクリートの“かぶり”についていていえば、
パイプ材１５の外径は主鋼材１３の外径よりも４．３１
大であるが、この場合のＪＩＳ規格でコンクリート厚さ
は１００ｍｍとされており、４゜３ ｍｍ程度の径差な
らば、副鋼材１３と組立鋼材１４の径と合算しても、主
鋼材１２と同様の作用を担うパイプ材１５の“かぶり”
は主鋼材１２に規定される１５ｍｍを充分確保する。Also, speaking of the “cover” of concrete,
The outer diameter of the pipe material 15 is 4.31 mm larger than the outer diameter of the main steel material 13.
Although it is large, the concrete thickness is set at 100 mm according to the JIS standard in this case, and if the diameter difference is about 4°3 mm, even if the diameters of the secondary steel material 13 and the assembly steel material 14 are combined, the main steel material 12 The “fogging” of pipe material 15 has the same effect as
15 mm specified for the main steel material 12 is sufficiently secured.
而して、本発明におけるパイプ材１５は主鋼材１２同様
にコンクリートへのプレストレス導入用とされるので、
組立鋼材１４と溶接しても溶接部の機械的性質が劣化し
ない主鋼材１２同等材質のものが使用されることとなる
。Since the pipe material 15 in the present invention is used for introducing prestress into concrete like the main steel material 12,
A material equivalent to the main steel material 12 is used, which does not deteriorate the mechanical properties of the welded part even when welded with the assembly steel material 14.
尚、コンクリート中に埋設される主鋼材１２およびパイ
プ材１５の本数は各種別１寸法のＰＣ矢板ごとに異なる
が、両者間の本数比率はほぼｌ：１程度が好ましい。Although the number of main steel materials 12 and pipe materials 15 buried in the concrete differs for each type of PC sheet pile of one size, it is preferable that the number ratio between the two is about 1:1.
本発明ＰＣ矢板ＩＯは先端直前方ヘジエットウオータを
噴射しつつ、自重と所定の前進駆動力とを介して打込ま
れるが、打込みが完了した後、パイプ材１５を頂頭側裸
出部を利用してチャックし、所定緊張力で牽引のうえ定
着し、導入プレストレスを当該ＰＣ矢板１０の規格に合
わせる。上記パイプ材１５の牽引、定着に際しては例え
ばねじ部１６を利用してもよい。The PC sheet pile IO of the present invention is driven using its own weight and a predetermined forward driving force while injecting hedgie water just in front of the tip, but after the driving is completed, the pipe material 15 is driven using the exposed part on the top side. The sheet is then chucked, pulled under a predetermined tension and fixed, and the introduced prestress is adjusted to the specifications of the PC sheet pile 10. For example, the threaded portion 16 may be used to pull and fix the pipe material 15.
ついで、プレストレス導入後のパイプ材１５の頂頭側開
端面から充填材を圧入し、パイプ材１５の管内に充満さ
せるとともに、先端側ノズルからも逸出させ、先端近傍
の空隙や土砂中に浸透させて根を形成し、全工程を完了
する。Next, the filler is press-fitted from the open end surface on the top side of the pipe material 15 after prestressing, filling the inside of the pipe material 15, and also allowing it to escape from the nozzle on the tip side, infiltrating into the voids and earth and sand near the tip. Let them form roots and complete the whole process.
尚、充填材圧入時までパイプ材１５管内を少なくとも通
水（高圧水でなくともよい）状態としていることが好ま
しい。何故ならば、パイプ材１５管内への土砂の侵入を
防止し、充填材圧入に際して管内を確実に充填して防錆
を完全とするとともに、先端側ノズルから充填材を逸出
させて確実に根を形成する。It is preferable that at least water (not necessarily high-pressure water) be allowed to flow through the inside of the pipe material 15 until the filler is press-fitted. This is because it prevents earth and sand from entering the pipe material 15, and when press-fitting the filler, it reliably fills the inside of the pipe to ensure complete rust prevention, and it also allows the filler to escape from the tip nozzle to ensure that the roots are firmly rooted. form.
（他の実施例）
上記実施例では、パイプ材１５は置き換えした主鋼材１
２の強度、断面積と同一の場合として説明したが、主鋼
材１２の引張り強さが例えば９５Ｋｇｆ／ｍｒｍ２のと
ころ、置き換えパイプ材１５として引張り強さが１２５
Ｋｇｆ／＋ｗｍ２．或いは１４５Ｋｇｆ／ＩＩＩＩＩ
１２のものを使用すれば、もし必要が生じた場合には、
打込み後のボストテンションによるプレストレス導入に
おいて上記パイプ材１５の引張り強さに対応した緊張力
で牽引し、定着すれば、通常時を超えてプレストレスを
追増可能である。(Other Examples) In the above example, the pipe material 15 is the replaced main steel material 1.
2, the tensile strength of the main steel material 12 is, for example, 95 kgf/mrm2, and the tensile strength of the replacement pipe material 15 is 125 kgf/mrm2.
Kgf/+wm2. Or 145Kgf/III
If you use 12 things, if the need arises,
When prestress is introduced by the boss tension after driving, if the pipe material 15 is pulled with a tension corresponding to the tensile strength of the pipe material 15 and fixed, it is possible to add prestress beyond the normal time.
上記実施例では、断面が波形を呈し、主鋼材にＰＣ鋼線
を使用したＰＣ矢板の主鋼材群中の一部所定位置の主鋼
材をパイプ材に置き替え配置した場合としたが、本発明
は断面が他の形状９例えば長方形等のＰＣ矢板にも同様
な配置構成を採り、かつ上記本発明打込み工法に従って
施工されることは言うまでもない。In the above embodiment, the main steel material at a predetermined position in the main steel material group of the PC sheet pile has a corrugated cross section and uses a PC steel wire as the main steel material, but the main steel material is replaced with a pipe material. Needless to say, the same arrangement can be applied to PC sheet piles having a cross section of other shapes 9, such as rectangular shapes, and the construction can be carried out according to the above-mentioned driving method of the present invention.
（発明の効果）
本発明は従来工法で必要としたパイロツＨ１矢板の建て
込み、引き抜きにより導孔を形成する前工程を不要とす
るので、設備費の低減、工程の簡易化に伴う工期の短縮
が可能となり、ウォタージェットの指向光を打ち込み先
直前方向とするので、ＰＣ矢板の直進的打込みが確実か
つ容易となり、さらには従来の如きＰＣ矢板打込み前の
多数本の高圧パイプを取りつける段取り、打込み後の高
圧パイプを土中からの引き抜く後工程を不要とするので
、現場作業性が大幅に向上する。そのうえ、構築物の根
を形成可能である。また、打込み後にパイプ材を緊張・
定着するので、パイプ材として主鋼材の引張り強さ以上
のものを使用すれば、必要に応じてＰＣ矢板の剪断耐力
の追増が可能であり、上記根の形成と相俟って構造物の
強度向上をも図ることが出来る。このように本発明を実
施すれば、多枝にわたり顕著な効果を奏するとして斯界
に賞月される。(Effects of the invention) The present invention eliminates the need for the pre-process of forming guide holes by erecting and pulling out pilot H1 sheet piles, which was required in the conventional construction method, thereby reducing equipment costs and shortening the construction period due to the simplification of the process. Since the directional light of the water jet is directed directly in front of the driving destination, straight driving of PC sheet piles becomes reliable and easy, and furthermore, it is possible to set up and drive a large number of high-pressure pipes before driving PC sheet piles, which was required in the past. Since there is no need for the subsequent process of pulling out the high-pressure pipe from the soil, on-site work efficiency is greatly improved. Moreover, it is possible to form the roots of the construct. In addition, the pipe material can be tightened and tightened after driving.
Therefore, if a pipe material with a tensile strength higher than that of the main steel material is used, it is possible to increase the shear strength of the PC sheet pile as needed, and in conjunction with the formation of roots, the structure's Strength can also be improved. If the present invention is implemented in this manner, it will be praised throughout the industry as having remarkable effects in many areas.
第１図（ａ）は本発明ＰＣコンクリート矢板の一実施例
の断面図、第１図（ｂ）および（ｃ）それぞれは（ａ）
に示す実施例の頂頭部分斜視図および先端部分斜視図、
第１図（ｄ）は他の実施例の先端部分断面図、第２図（
ａ）および（ｂ）は従来ＰＣ矢板の断面図および従来Ｐ
Ｃ矢板打込み状態を示す斜視図である。
１０−−−−−−−・−ＰＣコンクリート矢板１１・−
・・−・・・−コンクリート
１２−−−・−−−−−一主鋼材
１５ 、 １５ ａ ＝ １５ ｆ−・・・・−パイプ
材１８・−・・−・・−・−ノズル部
１９・・・−・・・・・・−碇着部FIG. 1(a) is a sectional view of one embodiment of the present invention PC concrete sheet pile, and FIG. 1(b) and (c) are respectively (a)
A top portion perspective view and a tip portion perspective view of the embodiment shown in
FIG. 1(d) is a partial sectional view of the tip of another embodiment, and FIG.
a) and (b) are cross-sectional views of conventional PC sheet piles and conventional P
It is a perspective view showing a C sheet pile driving state. 10----------PC concrete sheet pile 11--
--- Concrete 12 ---- Main steel material 15 , 15 a = 15 f --- Pipe material 18 --- Nozzle part 19・・・－・・・・・・－Anchoring section
Claims (1)
長外周をアンボンド状態としてコンクリート内所定位置
の主鋼材に替えて軸線方向に貫通、埋設されているＰＣ
コンクリート矢板を用い、当該矢板を、その軸線が打込
み方向を指向する状態、かつ上記パイプ材の支板頂頭側
開端面から管内に高圧水を送給して先端側管端からジェ
ットとして噴出させつつ先端を直接打込み位置土砂表面
に当接・位置決めし、上記ジェット射衝部に向かつて矢
板の自重と当該矢板に付加する所定前進駆動力とを介し
て打込み、ついで上記パイプ材を矢板先端側コンクリー
ト内に設けた碇着部を介して頂頭側から緊張、定着して
コンクリートへプレストレスを導入したのち、パイプ材
の管内に充填材を圧入することを特徴とするＰＣコンク
リート矢板打込み工法。 ２）パイプ材の管内に注入される充填材がコンクリート
矢板の先端側管端から噴出して周囲土砂中に根を形成せ
しめるようにした請求項１記載のＰＣコンクリート矢板
打込み工法。 ３）打ち込み後に行われるコンクリートへのプレストレ
ス導入が使用されるパイプ材の強度に応じたプレストレ
スの追増である請求項１記載のＰＣコンクリート矢板打
込み工法。４）ウオタージエツトを用いて打込まれるＰ
Ｃコンクリート矢板が、コンクリート中に埋設される主
鋼材群中の所定位置主鋼材に替えてほぼ全長外周をアン
ボンド状態とされたパイプ材を配置し、かつ当該パイプ
材をコンクリートを貫通させて矢板の頂頭端面および先
端端面に開口せしめ、先端部近傍のコンクリート中にパ
イプ材碇着部を設け、パイプ材の先端部がその管内に通
水される高圧水をジェット噴射可能に構成されているこ
とを特徴とするＰＣコンクリート矢板。 ５）パイプ材が引張強さ９５Ｋｇｆ／ｍｍ＾２以上であ
る請求項４記載のＰＣコンクリート矢板。 ６）パイプ材が高圧水通水時に可及的に管径の膨脹を来
さない肉厚からなる請求項４記載のＰＣコンクリート矢
板。 ７）パイプ材を矢板の頂頭端面から所定長さ裸出させ、
当該部分をウオタージエツト・ポンプと導通する管路と
接続可能に形成してなる請求項４記載のＰＣコンクリー
ト矢板。 ８）パイプ材を矢板の先端端面から所定長さ裸出させ、
当該部分にウオタージエツトノズルを配設した請求項４
記載のＰＣコンクリート矢板。 ９）パイプ材を矢板の先端端面から所定長さ裸出させ、
その先端の管内径を先細のテーパー状に形成してノズル
部とした請求項４記載のＰＣコンクリート矢板。[Claims] 1) A PC in which a high-pressure water conduction pipe material is penetrated and buried in the axial direction in place of the main steel material at a predetermined position in concrete with almost the entire outer circumference, except for a predetermined range at the tip, in an unbonded state.
Using a concrete sheet pile, the sheet pile is in a state where its axis is oriented in the driving direction, and high-pressure water is fed into the pipe from the open end surface on the top side of the support plate of the pipe material and is ejected as a jet from the tip side pipe end. The tip is directly brought into contact with and positioned on the soil surface at the driving position, and is driven toward the jet impact section using the own weight of the sheet pile and a predetermined forward driving force applied to the sheet pile, and then the pipe material is placed in the concrete on the tip side of the sheet pile. A PC concrete sheet pile driving method characterized by introducing prestress into the concrete by tensioning and fixing it from the top side through an anchoring part provided inside the concrete, and then press-fitting a filler material into the pipe material. 2) The PC concrete sheet pile driving method according to claim 1, wherein the filler injected into the pipe of the pipe material is ejected from the tip end of the concrete sheet pile and forms roots in the surrounding earth and sand. 3) The PC concrete sheet pile driving method according to claim 1, wherein the introduction of prestress into the concrete after pouring is an additional prestress depending on the strength of the pipe material used. 4) P driven in using a water jet
A concrete sheet pile C is constructed by placing a pipe material whose outer circumference is unbonded over almost the entire length in place of the main steel material at a predetermined position in the group of main steel materials buried in the concrete, and by penetrating the concrete with the pipe material to form the sheet pile. Openings are made on the top end surface and the tip end surface, and a pipe material anchoring portion is provided in the concrete near the tip, and the tip of the pipe material is configured to be able to jet jet high-pressure water to be passed into the pipe. Features of PC concrete sheet piles. 5) The PC concrete sheet pile according to claim 4, wherein the pipe material has a tensile strength of 95 Kgf/mm^2 or more. 6) The PC concrete sheet pile according to claim 4, wherein the pipe material has a wall thickness that prevents expansion of the pipe diameter as much as possible when high-pressure water is passed through the pipe material. 7) A predetermined length of pipe material is exposed from the top end surface of the sheet pile,
5. The PC concrete sheet pile according to claim 4, wherein said portion is formed so as to be connectable to a conduit communicating with a water jet pump. 8) A predetermined length of pipe material is exposed from the tip end face of the sheet pile,
Claim 4: A water jet nozzle is provided in the part.
The listed PC concrete sheet pile. 9) A predetermined length of pipe material is exposed from the tip end surface of the sheet pile,
The PC concrete sheet pile according to claim 4, wherein the inner diameter of the pipe at the tip thereof is formed into a tapered shape to form a nozzle portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18023289A JPH0768698B2 (en) | 1989-07-14 | 1989-07-14 | PC concrete sheet pile driving method and PC concrete sheet pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18023289A JPH0768698B2 (en) | 1989-07-14 | 1989-07-14 | PC concrete sheet pile driving method and PC concrete sheet pile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0347313A true JPH0347313A (en) | 1991-02-28 |
| JPH0768698B2 JPH0768698B2 (en) | 1995-07-26 |
Family
ID=16079687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18023289A Expired - Lifetime JPH0768698B2 (en) | 1989-07-14 | 1989-07-14 | PC concrete sheet pile driving method and PC concrete sheet pile |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0768698B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITPD20080329A1 (en) * | 2008-11-12 | 2010-05-13 | Lucio Pedrocco | PALANCOLA IN PRECOMPRESSED REINFORCED CONCRETE, METHOD OF PRODUCTION OF SUCH A PALANCOLA AND WALL INCLUDING A PLURALITY OF SUCH PALANCOLE |
| CN101812840A (en) * | 2010-04-23 | 2010-08-25 | 上海中技桩业股份有限公司 | U-shaped concrete slab pile |
| CN112081096A (en) * | 2020-09-15 | 2020-12-15 | 温州源铭振跃科技有限公司 | Concrete sheet pile |
-
1989
- 1989-07-14 JP JP18023289A patent/JPH0768698B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITPD20080329A1 (en) * | 2008-11-12 | 2010-05-13 | Lucio Pedrocco | PALANCOLA IN PRECOMPRESSED REINFORCED CONCRETE, METHOD OF PRODUCTION OF SUCH A PALANCOLA AND WALL INCLUDING A PLURALITY OF SUCH PALANCOLE |
| CN101812840A (en) * | 2010-04-23 | 2010-08-25 | 上海中技桩业股份有限公司 | U-shaped concrete slab pile |
| CN112081096A (en) * | 2020-09-15 | 2020-12-15 | 温州源铭振跃科技有限公司 | Concrete sheet pile |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0768698B2 (en) | 1995-07-26 |
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