JPH0472010B2 - - Google Patents

Info

Publication number
JPH0472010B2
JPH0472010B2 JP59077996A JP7799684A JPH0472010B2 JP H0472010 B2 JPH0472010 B2 JP H0472010B2 JP 59077996 A JP59077996 A JP 59077996A JP 7799684 A JP7799684 A JP 7799684A JP H0472010 B2 JPH0472010 B2 JP H0472010B2
Authority
JP
Japan
Prior art keywords
pile
pile body
weight
tip portion
shoe
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.)
Expired - Lifetime
Application number
JP59077996A
Other languages
Japanese (ja)
Other versions
JPS60223523A (en
Inventor
Jutaro Nakayama
Hisao Kanamori
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kumagai Gumi Co Ltd
Original Assignee
Kumagai Gumi Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kumagai Gumi Co Ltd filed Critical Kumagai Gumi Co Ltd
Priority to JP7799684A priority Critical patent/JPS60223523A/en
Publication of JPS60223523A publication Critical patent/JPS60223523A/en
Publication of JPH0472010B2 publication Critical patent/JPH0472010B2/ja
Granted legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
    • E02D7/28—Placing of hollow pipes or mould pipes by means arranged inside the piles or pipes

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)

Description

【発明の詳細な説明】 （産業上の利用分野） 本発明は、既製杭を地中に沈設する方法および
装置に関し、特に、中空の杭本体と該杭本体の下
部にその軸線方向へ相対運動可能に取り付けられ
た沓先部分とから成る杭の沈設方法および装置に
関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method and apparatus for sinking ready-made piles into the ground, and in particular, to a hollow pile body and a lower part of the pile body that have relative movement in the axial direction. The present invention relates to a method and apparatus for sinking a pile, which comprises a removably attached shoe tip.

（従来の技術） このような杭の沈設のために、杭本体の中空部
に配置した伝達棒と該伝達棒の上面を打撃する被
駆動のカムとにより、杭本体下部の沓先部分を打
撃して地中に貫入させ、杭本体をその頭部に置か
れた重錘の作用により前記沓先部分の地中貫入に
追随させて下降させる杭沈設方法および装置が知
られている（特開昭54−132306号）。(Prior art) In order to sink such a pile, the tip of the shoe at the bottom of the pile body is struck by a transmission rod placed in the hollow part of the pile body and a driven cam that strikes the upper surface of the transmission rod. There is known a method and apparatus for sinking a pile in which the pile body is lowered by the action of a weight placed on the head of the pile to follow the penetration of the foot into the ground (Unexamined Japanese Patent Publication No. (Sho 54-132306).

この杭沈設方法および装置は、杭本体の下降量
を測定することにより、沓先部分の到達深度すな
わち杭本体の打設深度を知ることができるという
点で有利である。 This pile sinking method and apparatus is advantageous in that by measuring the amount of descent of the pile body, the depth reached by the tip of the pile, that is, the driving depth of the pile body can be determined.

（発明が解決しようとする課題） ところで、地盤に掘削した孔に杭を立てて孔底
地盤を打撃する場合、孔底のスライムを圧密する
沓先部分の真直な下降を確実にするため、打撃力
を初めは小さく、その後は大きく設定することが
求められる。前記従来の杭施工方法および装置に
よれば、カムの一回当たりの打撃力の大きさの変
更は前記カムの大きさの変更により可能である。
しかし、カムの大きさの変更のためにはカムの取
替えが必要であり、カムの取替えのためにはカム
の駆動装置を杭本体から取外しまた杭本体に取付
ける作業が不可欠である。前記カムの駆動装置の
取外しおよび取付けには多大の労力と時間とを要
し、これが杭沈設の施工性を阻害する。さらに、
前記カムの取替えに時間を要する結果、この間に
前記沓先部分および杭本体が周囲地盤の締付けを
受け、この締付け力に抗しての前記沓先部分した
がつてまた前記杭本体の下降にはさらに大きい打
撃力を必要とし、これが杭の沈設の施工能率をさ
らに低下させる。(Problem to be solved by the invention) By the way, when a pile is erected in a hole drilled in the ground and the ground at the bottom of the hole is struck, in order to ensure that the tip of the shoe, which consolidates the slime at the bottom of the hole, descends straight, It is necessary to set the force small at first, and then set it large. According to the conventional pile construction method and apparatus, the magnitude of the impact force per cam can be changed by changing the size of the cam.
However, in order to change the size of the cam, it is necessary to replace the cam, and in order to replace the cam, it is essential to remove the cam drive device from the pile body and attach it to the pile body. Removing and installing the cam drive device requires a great deal of effort and time, which impedes the workability of pile sinking. moreover,
As a result of the time it takes to replace the cam, the shoe tip and the pile body are subjected to tightening by the surrounding ground during this time, and the shoe tip and the pile body resist this tightening force. A larger impact force is required, which further reduces the efficiency of pile sinking.

したがつて、本発明の目的は、杭の沈設作業に
おいて、杭本体の下部に相対運動可能に取り付け
られた沓先部分に対する打撃力の強弱の変更を容
易かつ短時間のうちになし得るようにするととも
に、前記沓先部分を杭の軸線方向へ真直に下降さ
せることにある。 SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a method for easily and quickly changing the strength of the impact force on the shoe tip, which is attached to the lower part of the pile body so as to be relatively movable, during pile sinking work. At the same time, the tip portion of the shoe is lowered straight in the axial direction of the pile.

（課題を解決するための手段） 本発明は上記目的を達成するための杭の沈設方
法とその装置とを提供する。(Means for Solving the Problems) The present invention provides a pile sinking method and apparatus for achieving the above object.

本発明に係る杭の沈設方法は、中空部を有する
杭本体の頭部に加重重錘を載せて該杭本体にその
軸線方向へ下向き力を付与する間に、前記杭本体
の下部に該杭本体に対してその軸線方向へ相対運
動可能にかつ前記軸線方向への案内作用を受ける
ように取り付けた沓先部分を前記杭本体の中空部
に配置した打撃重錘の自由落下により打撃して前
記沓先部分を地中に貫入させる。 In the method for sinking a pile according to the present invention, while a weight is placed on the head of a pile body having a hollow part and a downward force is applied to the pile body in the axial direction, the pile body is placed in the lower part of the pile body. The tip of the shoe, which is attached to the main body so as to be able to move relative to the main body in the axial direction and receive a guiding action in the axial direction, is struck by the free fall of a striking weight disposed in the hollow part of the pile main body. Penetrate the tip of the shoe into the ground.

また、本発明に係る杭の沈設装置は、中空部を
有する杭本体の頭部に載置した加重重錘と、前記
杭本体の下部に該杭本体に対してその軸線方向へ
相対運動可能に取り付けた沓先部分を自由落下に
より打撃するための、前記杭本体の中空部に配置
した打撃重錘と、前記沓先部分を前記杭本体の軸
線方向へ案内するための案内手段とを含み、前記
加重重錘は前記杭本体のほぼ軸線上に貫通孔を有
し、前記打撃重錘は前記貫通孔を通る吊り部材を
介して操作機構に連結されている。 In addition, the pile sinking device according to the present invention includes a weighted weight placed on the head of a pile body having a hollow portion, and a lower part of the pile body capable of relative movement in the axial direction with respect to the pile body. A striking weight disposed in the hollow part of the pile body for striking the attached shoe tip portion by free fall, and a guide means for guiding the shoe tip portion in the axial direction of the pile body, The weighting weight has a through hole substantially on the axis of the pile body, and the impact weight is connected to the operating mechanism via a hanging member passing through the through hole.

（発明の作用および効果） 本発明によれば、沓先部分に与えられる打撃力
の大きさの変更は打撃重錘の自由落下高さの変更
によるため、これを容易かつ短時間で行なうこと
ができる。したがつて、作業能率を低下させるこ
となしに打撃力の大きさを変更することができ
る。また、打撃力の変更に長時間を要する場合に
生じる杭本体および沓先部分の周囲地盤からの締
付けに伴なうこれらの沈下速度の低下に起因する
杭の沈設作業の能率低下を回避することができ
る。(Operations and Effects of the Invention) According to the present invention, since the magnitude of the impact force applied to the tip of the shoe is changed by changing the free fall height of the impact weight, this can be done easily and in a short time. can. Therefore, the magnitude of impact force can be changed without reducing work efficiency. In addition, it is possible to avoid a decrease in the efficiency of the pile installation work due to a decrease in the sinking speed of the pile body and the tip of the pile due to the tightening of the surrounding ground when it takes a long time to change the impact force. I can do it.

さらに、本発明によれば、吊り部材が加重重錘
の貫通孔を経てほぼ杭の軸線上を伸びることか
ら、前記吊り部材に吊持された打撃重錘は前記沓
先部分のほぼ中央部に落下しかつこれを打撃し、
これにより、前記沓先部分を真直に下降させるこ
とができる。 Furthermore, according to the present invention, since the hanging member extends substantially along the axis of the pile through the through hole of the weighted weight, the striking weight suspended by the hanging member is located approximately at the center of the tip portion of the shoe. fall and strike it,
Thereby, the tip portion of the shoe can be lowered straight down.

さらに、前記沓先部分はその打撃の間に前記杭
本体の軸線方向への案内作用を受けることから、
例えばれき等に突き当たることがあつてもその進
行方向が前記軸線方向以外の方向に反れることが
防止され、これにより、前記沓先部分の真直な下
降が保証される。 Furthermore, since the shoe tip portion receives a guiding action in the axial direction of the pile body during the impact,
For example, even if the shoes collide with debris, the direction of travel is prevented from deflecting in a direction other than the axial direction, thereby ensuring straight descent of the tip of the shoe.

（実施例） まず、第１Ａ図および第１Ｂ図を参照して、本
発明の方法および装置に適用される杭および該杭
の本体に取り付けられる先端部について説明す
る。(Example) First, with reference to FIGS. 1A and 1B, a stake applied to the method and apparatus of the present invention and a tip portion attached to the main body of the stake will be described.

第１Ａ図には、杭本体１１および先端部１５の
組立体である杭１０の一例が示されている。この
例では、杭本体１１は遠心力を利用して工場生産
される、中空部を有する既製コンクリート管であ
る。杭本体１１の底部１２には先端部１５が止水
部材２２を介して取り付けられている。先端部１
５は鉄、コンクリートまたは鉄とコンクリートと
の複合体で形成されており、杭本体１１とは別個
に製作される。先端部１５は沓先部分１６および
円筒形の嵌合バンド１７から成る。沓先部分１６
は後述する打撃重錘４０による打撃力をその頂面
２０に受けて地盤に貫入される部分であり、ま
た、嵌合バンド１７は沓先部分１６に強固に取り
付けられ、止水部材２２を介して杭本体１１に取
り付けられる部分である。沓先部分１６の形状
は、円筒形、台形、円錐等、任意の形状でよい。
参照数字１９は支持地盤への貫入面を示す。 FIG. 1A shows an example of a pile 10 that is an assembly of a pile body 11 and a tip end 15. As shown in FIG. In this example, the pile main body 11 is a ready-made concrete pipe having a hollow portion and produced in a factory using centrifugal force. A tip portion 15 is attached to the bottom portion 12 of the pile body 11 via a water stop member 22. Tip part 1
5 is made of iron, concrete, or a composite of iron and concrete, and is manufactured separately from the pile body 11. The tip portion 15 consists of a shoe tip portion 16 and a cylindrical fitting band 17. Shoe tip part 16
is a portion that penetrates into the ground by receiving a striking force from a striking weight 40 (described later) on its top surface 20, and the fitting band 17 is firmly attached to the shoe tip portion 16, and is inserted through a water stop member 22. This is the part that is attached to the pile main body 11. The shape of the shoe tip portion 16 may be any shape such as cylindrical, trapezoidal, or conical.
Reference numeral 19 indicates the plane of penetration into the supporting soil.

第１Ｂ図には前記組立体すなわち杭の他の例が
示されている。先端部１５は、第１Ａ図の円筒形
の嵌合バンド１７の代わりに沓先嵌合凸部１８を
有する。この嵌合凸部１８は止水部材２２を介し
て杭本体１１に嵌入され、これにより先端部１５
が杭本体１１に取り付けられる。嵌合凸部１８の
頂面２０は第１Ａ図におけると同様に打撃を受け
る面を形成する。 Another example of such an assembly or pile is shown in FIG. 1B. The distal end portion 15 has a shoe tip fitting protrusion 18 instead of the cylindrical fitting band 17 shown in FIG. 1A. This fitting convex portion 18 is fitted into the pile main body 11 via the water stop member 22, so that the tip portion 15
is attached to the pile body 11. The top surface 20 of the mating projection 18 forms a striking surface similar to that in FIG. 1A.

図示しないが、先端部１５は沓先部分１６に対
して円筒形の嵌合バンド１７および嵌合凸部１８
の双方を取り付けて形成することができる。 Although not shown, the tip portion 15 has a cylindrical fitting band 17 and a fitting protrusion 18 with respect to the shoe tip portion 16.
It can be formed by attaching both.

前記した嵌合バンド１７または嵌合凸部１８
は、沓先部分１６が地盤に貫入されるとき、沓先
部分１６を杭本体１１の軸線方向へ案内するめの
案内手段を成す。嵌合バンド１７または嵌合凸部
１８の案内作用については後述する。 The aforementioned fitting band 17 or fitting convex portion 18
constitutes a guide means for guiding the shoe tip portion 16 in the axial direction of the pile body 11 when the shoe tip portion 16 penetrates into the ground. The guiding action of the fitting band 17 or the fitting protrusion 18 will be described later.

止水部材２２は、杭本体１１の底部１２の外周
面と円筒状の嵌合バンド１７の内周面との間の空
隙、および、杭本体１１の底部１２の内周面と嵌
合凸部１８の外周面との間の空隙のそれぞれを埋
めるために用いられている。止水部材２２は、こ
れらの２つの部材をぴつたりと嵌合させて止水す
ると同時に、後述する先端部１５に対する打撃の
際、杭本体１１の軸線方向に関する前記２つの部
材間のいくらかの相対的変位すなわち相対運動を
可能にするような弾性結合を与える。このため、
止水部材２２は止水ゴムまたは止水性と弾性とを
有する他の任意の材料から成る。 The water stop member 22 has a gap between the outer circumferential surface of the bottom 12 of the pile main body 11 and the inner circumferential surface of the cylindrical fitting band 17, and a gap between the inner circumferential surface of the bottom 12 of the pile main body 11 and the fitting convex part. It is used to fill in each of the gaps between the outer circumferential surfaces of the 18 parts. The water stop member 22 stops water by tightly fitting these two members, and at the same time prevents some relative distance between the two members in the axial direction of the pile body 11 when the tip portion 15 is hit, which will be described later. Provides an elastic connection that allows for relative displacement or relative movement. For this reason,
The water stop member 22 is made of water stop rubber or any other material having water stop properties and elasticity.

第２Ａ図、第２Ｂ図および第２Ｃ図を参照し
て、本発明において用いられる杭頭加重重錘３０
を説明する。第２Ａ図、第２Ｂ図および第２Ｃ図
は加重重錘３０の例を示す。 Referring to FIGS. 2A, 2B, and 2C, the pile head weight weight 30 used in the present invention
Explain. FIGS. 2A, 2B, and 2C show examples of weighted weights 30. FIG.

加重重錘３０は、基本的に、重錘本体３１と重
錘本体３１の中央を垂直方向に貫通する貫通孔３
２とから成る重りであれば、その形状および材質
は任意のものでよい。加重重錘３０は杭頭部１４
に安定に載置され、かつ、載置されたときに加重
重錘３０の貫通孔３２が杭１０したがつて杭本体
１１の軸線とほぼ同軸方向になる必要がある。 The weighted weight 30 basically has a weight body 31 and a through hole 3 that vertically passes through the center of the weight body 31.
2, the shape and material of the weight may be arbitrary. The weighted weight 30 is the pile head 14
It is necessary that the through hole 32 of the weighted weight 30 be placed in a stable manner, and that the through hole 32 of the weighted weight 30 be substantially coaxial with the axis of the pile 10 and therefore the pile body 11 when placed.

貫通孔３２は該貫通孔を通して打撃重錘４０
（第３Ｅ図参照）を吊り下げるロープ、棒等の吊
り部材４１（第３Ｅ図参照）が容易に上下できる
のにじゅうぶんな内径を有する。 The through hole 32 allows the impact weight 40 to pass through the through hole.
It has a sufficient inner diameter to allow a hanging member 41 (see FIG. 3E), such as a rope or rod, for suspending the hanger (see FIG. 3E) to be easily raised and lowered.

加重重錘３０は、第２Ａ図に示すように、杭頭
部に単に載るものでもよく、第２Ｂ図に示すよう
に、杭本体１１の頭部の内部に嵌入する外周壁を
有する嵌合凸部３３または杭本体１１の頭部１４
を受け入れる内周壁を有する嵌合凹部３４をその
底部に設けたものでよい。 The weighted weight 30 may be one that simply rests on the head of the pile, as shown in FIG. 2A, or a fitting convex having an outer peripheral wall that fits inside the head of the pile body 11, as shown in FIG. 2B. part 33 or the head 14 of the pile body 11
A fitting recess 34 having an inner circumferential wall for receiving the fitting recess 34 may be provided at the bottom thereof.

図示しないが、加重重錘３０は環状溝をその底
部に設けて、杭本体１１の頭部１４が嵌入するよ
うにしてもよい。いずれにしても、加重重錘３０
が杭頭部１４に安定して載置されるような形状で
あればよい。 Although not shown, the weight 30 may be provided with an annular groove at its bottom, into which the head 14 of the pile body 11 is fitted. In any case, the weighted weight 30
Any shape is sufficient as long as it can be stably placed on the pile head 14.

また、掘削した穴６０（第３Ｄ図参照）中に先
端部１５を有する杭１０を挿入した時の固化液ま
たは流動性の高い泥土６１によつて受ける浮力
（W1）、前記固化液または流動性の高い泥土６１
と杭本体１１との間の摩擦力（W2）および杭本
体１１と先端部１５との間に介在する止水部材２
２による接着力（W3）との合力（W1＋W2＋
W3）に対し、杭本体の重量（W0）と加重重錘３
０の重量（Ｗ）との合力（W0＋Ｗ）が十分に大
きく、打撃重錘４０により先端部１５を打撃した
とき、杭本体１１が先端部１５の支持地盤への貫
入に追従する重量であればよい。 In addition, when the pile 10 having the tip 15 is inserted into the excavated hole 60 (see Figure 3D), the buoyancy (W 1 ) exerted by the solidified liquid or the highly fluid mud 61, the solidified liquid or the flowing High quality mud 61
and the frictional force (W 2 ) between the pile body 11 and the water stop member 2 interposed between the pile body 11 and the tip end 15.
The resultant force ( W 1 + W 2 +
W 3 ), the weight of the pile body (W 0 ) and the weight 3
When the resultant force (W 0 +W) with the weight (W) of Good to have.

次に、第３Ａ図ないし第３Ｆ図を参照して本発
明の杭沈設方向を説明する。 Next, the pile sinking direction of the present invention will be explained with reference to FIGS. 3A to 3F.

第３Ａ図に示すように、最初に杭本体１１の直
径D2（第３Ｄ図参照）より大きい直径D1を有する
刃形を持つアースオーガ５０で杭を埋込むべき穴
６０を掘削する。 As shown in FIG. 3A, first, a hole 60 in which the pile is to be embedded is excavated using an earth auger 50 having a blade shape having a diameter D 1 larger than the diameter D 2 of the pile body 11 (see FIG. 3D).

アースオーガのシヤフトは中空であり、その先
端または周辺に、その中空シヤフトを通してセメ
ント混合液（セメント・ベントナイト混合液）の
ような固化液を噴射する噴射口５１を有する。 The shaft of the earth auger is hollow and has an injection port 51 at its tip or periphery for injecting a solidifying liquid such as a cement mixture (cement-bentonite mixture) through the hollow shaft.

アースオーガ５０によつて所定位置まで穴６０
を掘削した後、アースオーガ５０を抜き出す。こ
のとき、前記固化液を噴射口５１より噴射しなが
らアースオーガ５０を抜き出す。このため、アー
スオーガ５０によつて残土６１と噴射した前記固
化液とが攪拌混合されて流動性の高い泥土６２が
形成される。この泥土６２はアースオーガ５０が
完全に抜き出されたとき、穴６０中に残される。
残された泥土は前記固化液により時間の経過と共
に固化する。 The hole 60 is pushed into place by the earth auger 50.
After excavating, the earth auger 50 is taken out. At this time, the earth auger 50 is extracted while injecting the solidified liquid from the injection port 51. Therefore, the earth auger 50 stirs and mixes the remaining soil 61 and the injected solidified liquid to form highly fluid mud 62. This mud 62 is left in the hole 60 when the earth auger 50 is completely extracted.
The remaining mud is solidified over time by the solidification liquid.

なお、前記固化液は、アースオーガの抜き出し
時ばかりでなく、掘削時において噴射口５１より
噴射し、残土６１と攪拌混合することができる。 The solidified liquid can be injected from the injection port 51 and mixed with the residual soil 61 not only when the earth auger is extracted, but also when excavating.

第３Ｂ図は、アースオーガ５０が所定位置まで
掘削している状態を示し、第３Ｃ図は、アースオ
ーガ５０が前記固化液を噴射しながら抜き出され
ている状態を示す。 FIG. 3B shows a state in which the earth auger 50 is excavating to a predetermined position, and FIG. 3C shows a state in which the earth auger 50 is being extracted while injecting the solidified liquid.

前記した工程までは、本発明の方法の準備段階
であり、したがつて、泥土が残された穴を掘るこ
とができれば、前述の工程に限られることなく、
任意の工法を用いることができる。 The steps up to the above are preliminary stages of the method of the present invention, and therefore, the steps are not limited to the steps described above, as long as the hole can be dug in which mud is left behind.
Any construction method can be used.

第３Ｄ図に示すように穴６０に杭１０を挿入す
るのであるが、一本の杭の長さが穴６０の深さに
対して十分長くないときには、適当な長さの杭本
体を継ぎ足して杭の底部を支持地盤に到達させ
る。参照数字１３は杭の結合部を示す。 As shown in Figure 3D, the stake 10 is inserted into the hole 60, but if the length of one stake is not long enough for the depth of the hole 60, add a stake body of an appropriate length. Allow the bottom of the pile to reach the supporting ground. Reference numeral 13 indicates the joint of the pile.

第３Ｅ図は、一連の杭が支持地盤に到達した状
態を示しており、このとき、先端部１５は支持地
盤に対してまだ不安定な状態にあり、堅く埋込ま
れていない。 Figure 3E shows the series of piles reaching the supporting soil, with the tips 15 still unstable and not firmly embedded in the supporting soil.

この状態において、第３Ｅ図に示すように、打
撃重錘４０がその吊り部材４１を加重重錘３０の
貫通孔３２に通した状態で杭本体１１の中空部内
に入れられ、その後、加重重錘３０が杭頭部に安
定に載置される。 In this state, as shown in FIG. 3E, the impact weight 40 is inserted into the hollow part of the pile body 11 with its hanging member 41 passed through the through hole 32 of the weighted weight 30, and then 30 is stably placed on the pile head.

第３Ｆ図に示すように、打撃重錘４０は、その
吊り部材４１を介して吊り上げ、その後、自由落
下を反復して行なうための操作機構として用いら
れるウインチ７０に結合される。 As shown in FIG. 3F, the striking weight 40 is coupled to a winch 70 that is used as an operating mechanism for lifting the striking weight 40 via its hanging member 41 and then repeatedly free falling.

次いで、ウインチ７０の動作により、打撃重錘
４０を吊り部材４１を介して杭本体１１の中空部
内で所定の高さまで持ち上げ、次に自由落下させ
る。吊り部材４１がほぼ杭１０の軸線上にあるた
め、吊り部材４１に吊持された打撃重錘４０は沓
先部分１６の頂面２０のほぼ中央に落下しかつこ
れを打撃する。これにより、先端部１５を真直に
下降させることができる。沓先部分１６は、下降
の間、嵌合バンド１７又は嵌合凸部１８による杭
本体１１の軸線方向への案内作用を受ける。この
案内作用のために、沓先部分１６は例えばれき等
に突き当たつても前記軸線方向以外の方向に反れ
ることなしに真直に進行する。打撃重錘４０の自
由落下を反復して行なう。これにより、先端部１
５が支持地盤に確実にかつ堅く貫入し、杭１０を
支持地盤に堅く埋込ませる。第３Ｆ図はこの状態
を示している。 Next, by operating the winch 70, the striking weight 40 is lifted up to a predetermined height within the hollow part of the pile body 11 via the hanging member 41, and then allowed to fall freely. Since the hanging member 41 is located approximately on the axis of the pile 10, the striking weight 40 suspended by the hanging member 41 falls approximately at the center of the top surface 20 of the shoe tip portion 16 and strikes it. This allows the tip portion 15 to be lowered straight down. During the descent, the shoe tip portion 16 is guided in the axial direction of the pile body 11 by the fitting band 17 or the fitting convex portion 18 . Due to this guiding action, the shoe tip portion 16 moves straight without being warped in a direction other than the axial direction even if it hits, for example, debris. The free fall of the striking weight 40 is repeated. As a result, the tip 1
5 reliably and firmly penetrates into the supporting ground, and the pile 10 is firmly embedded in the supporting ground. FIG. 3F shows this state.

先端部１５に付与する前記打撃力の大きさは打
撃重錘４０の持ち上げ高さを変えることにより、
簡単にかつ短時間で変えることができる。 The magnitude of the impact force applied to the tip portion 15 can be adjusted by changing the lifting height of the impact weight 40.
It can be changed easily and in a short time.

この打撃の際、沓先部分１６は杭底部１２に対
して支持地盤中への貫入長さだけ下方へ一時的に
変位するが、杭１０の自重と、加重重錘３０の重
量とが、杭本体１１の浮力、泥土と杭本体１１と
の摩擦力および杭本体１１と先端部１５の嵌合抵
抗力の総和に打勝つて杭本体１１はその底部端面
が沓先部分１６に接するまで沈下し、支持地盤に
確実にかつ堅く定着される。 During this impact, the shoe tip portion 16 is temporarily displaced downward relative to the pile bottom portion 12 by the length of penetration into the supporting ground, but the own weight of the pile 10 and the weight of the load weight 30 Overcoming the sum of the buoyancy of the main body 11, the frictional force between the mud and the pile main body 11, and the fitting resistance force between the pile main body 11 and the tip portion 15, the pile main body 11 sinks until its bottom end surface contacts the shoe tip portion 16. , is firmly and firmly anchored to the supporting ground.

このことから明らかなように、加重重錘３０の
重量および杭１０の自重の合計が前述の浮力、摩
擦力および嵌合力の総和より大きければ大きいほ
ど、先端部１５への杭本体１１の追従速度は大き
い。 As is clear from this, the larger the sum of the weight of the weighted weight 30 and the dead weight of the pile 10 is than the sum of the above-mentioned buoyancy, frictional force, and fitting force, the faster the pile body 11 follows the tip 15. is big.

また、杭本体１１が未だ固化していない流動性
の高い固化液または流動性の高い泥土で覆れ、杭
本体１１に大きい浮力が作用している状態におい
ては、杭本体１１は動き易く不安定な状態にあ
る。このような状態において、加重重錘３０を用
いないで、すなわち加重重錘３０を杭頭部１４に
載置せずに先端部１５を打撃すると、杭本体１１
を安定に保つ軸線方向力が働かないために杭１０
は前後左右に動揺し、適切な埋込みを行なうこと
ができないこととなる。このため、加重重錘を用
いることは重要である。 In addition, when the pile body 11 is covered with highly fluid solidified liquid or highly fluid mud that has not yet solidified, and a large buoyant force is acting on the pile body 11, the pile body 11 is likely to move and become unstable. is in a state of In such a state, if the tip portion 15 is struck without using the weighted weight 30, that is, without placing the weighted weight 30 on the pile head 14, the pile body 11
Because the axial force that keeps the pile stable does not work, the pile 10
The implant oscillates from front to back and from side to side, making it impossible to perform proper implantation. For this reason, it is important to use a weighted weight.

また、騒音に関して、打撃は杭本体１１の中空
部内において打撃加重が先端部１５に対して行な
われ、また、杭頭部１４が加重重錘３０で遮蔽さ
れているので、前記中空部内で発生した音は外部
にはほとんど漏れることはない。 Regarding noise, since the impact load is applied to the tip 15 within the hollow part of the pile body 11, and the pile head 14 is shielded by the weighted weight 30, the noise generated within the hollow part is Almost no sound leaks outside.

さらに、打撃重錘４０の吊り部材４１に適当な
目印を付け、この移動量を測定するスケールを設
けることにより、打撃重錘４０の位置が容易に検
出でき、打撃重錘４０の落下高さ（Ｈ）を容易に
調整しまた知ることができる。また、打撃重錘４
０の重量（Ｇ）および落下高さ（Ｈ）と、杭本体
１１と一体的に変位する加重重錘３０の変位量
（Ｓ）の測定値とにより、杭本体１１の支持力を
簡単かつ直接的に見出すことができる。 Furthermore, by attaching an appropriate mark to the hanging member 41 of the percussion weight 40 and providing a scale for measuring the amount of movement, the position of the percussion weight 40 can be easily detected, and the falling height of the percussion weight 40 ( H) can be easily adjusted and known. Also, striking weight 4
The supporting force of the pile body 11 can be easily and directly determined by the weight (G) and falling height (H) of the pile body 11, and the measured displacement (S) of the weight 30 that is integrally displaced with the pile body 11. can be found.

【図面の簡単な説明】[Brief explanation of drawings]

第１Ａ図および第１Ｂ図は杭本体および先端部
の組立体である杭の例を示す概略縦断面図、第２
Ａ図、第２Ｂ図および第２Ｃ図は加重重錘の例を
示す側面図、第３Ａ図から第３Ｆ図までの各図は
本発明の杭沈設方法を説明する概略側面図であ
る。 １０……杭、１１……杭本体、１２……杭底
部、１４……杭頭部、１５……先端部、１６……
沓先部分、２２……止水部材、３０……加重重
錘、３２……貫通孔、４０……打撃重錘、４１…
…吊り部材。 Figures 1A and 1B are schematic vertical sectional views showing an example of a pile that is an assembly of a pile body and a tip;
Figures A, 2B, and 2C are side views showing an example of a weighted weight, and Figures 3A to 3F are schematic side views illustrating the pile sinking method of the present invention. 10...Pile, 11...Pile body, 12...Pile bottom, 14...Pile head, 15...Tip, 16...
Shoe tip portion, 22... Water stop member, 30... Weighted weight, 32... Through hole, 40... Impact weight, 41...
...Hanging member.

Claims (1)

【特許請求の範囲】 １ 中空部を有する杭本体の頭部に加重重錘を載
せて該杭本体にその軸線方向へ下向き力を付与す
る間に、前記杭本体の下部に該杭本体に対してそ
の軸線方向へ相対運動可能にかつ前記軸線方向へ
の案内作用を受けるように取り付けた沓先部分を
前記杭本体の中空部に配置した打撃重錘の自由落
下により打撃して前記沓先部分を地中に貫入させ
る、杭の沈設方法。 ２ 前記沓先部分が水止部材を介して前記杭本体
に取り付けられている、特許請求の範囲第１項に
記載の杭の沈設方法。 ３ 中空部を有する杭本体の頭部に載置した加重
重錘と、前記杭本体の下部に該杭本体に対してそ
の軸線方向へ相対運動可能に取り付けた沓先部分
を自由落下により打撃するための、前記杭本体の
中空部に配置した打撃重錘と、前記沓先部分を前
記杭本体に対してその軸線方向へ案内するための
案内手段とを含み、前記加重重錘は前記杭本体の
ほぼ軸線上に貫通孔を有し、前記打撃重錘は前記
貫通孔を通る吊り部材を介して操作機構に連結さ
れている、杭の沈設方法。 ４ 前記沓先部分が水止部材を介して前記杭本体
に取り付けられている、特許請求の範囲第３項に
記載の杭の沈設方法。[Scope of Claims] 1. While applying a downward force to the pile body in the axial direction by placing a weight on the head of the pile body having a hollow part, a load is applied to the lower part of the pile body against the pile body. The shoe tip portion, which is attached so as to be relatively movable in the axial direction and receive a guiding action in the axial direction, is struck by the free fall of a striking weight disposed in the hollow part of the pile main body, and the shoe tip portion is A method of installing piles that penetrates into the ground. 2. The pile sinking method according to claim 1, wherein the shoe tip portion is attached to the pile main body via a water stop member. 3 A weighted weight placed on the head of a pile body having a hollow part and a shoe tip attached to the lower part of the pile body so as to be movable relative to the pile body in the axial direction are struck by free fall. a striking weight disposed in a hollow portion of the pile body, and a guide means for guiding the tip portion of the shoe in the axial direction of the pile body, and the loading weight is arranged in a hollow portion of the pile body. has a through hole substantially on the axis of the pile, and the striking weight is connected to an operating mechanism via a hanging member passing through the through hole. 4. The pile sinking method according to claim 3, wherein the shoe tip portion is attached to the pile main body via a water stop member.
JP7799684A 1984-04-18 1984-04-18 Piling work Granted JPS60223523A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7799684A JPS60223523A (en) 1984-04-18 1984-04-18 Piling work

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7799684A JPS60223523A (en) 1984-04-18 1984-04-18 Piling work

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP10308490A Division JPH03115614A (en) 1990-04-20 1990-04-20 Weight

Publications (2)

Publication Number Publication Date
JPS60223523A JPS60223523A (en) 1985-11-08
JPH0472010B2 true JPH0472010B2 (en) 1992-11-17

Family

ID=13649417

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7799684A Granted JPS60223523A (en) 1984-04-18 1984-04-18 Piling work

Country Status (1)

Country Link
JP (1) JPS60223523A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63107614A (en) * 1986-10-24 1988-05-12 Kumagai Gumi Ltd Method and apparatus for constructing pile foundation
EP2478157B1 (en) * 2009-09-14 2016-03-09 Blade Offshore Services Ltd. Method, apparatus and system for attaching an anchor member to a floor of a body of water

Also Published As

Publication number Publication date
JPS60223523A (en) 1985-11-08

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