JP2018111961A - Pile driving method - Google Patents
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Abstract
Description
本発明は、杭打ち方法に関する。 The present invention relates to a pile driving method.
従来から、地盤内への杭の打ち込みに関して、様々な杭打ち方法が提案されている。例えば、鋼管杭をリーダに保持し、地中に直接又は予め掘削した孔内に建て込んだ状態で、鋼管杭の頭部を打撃して打設する打撃工法が知られている。 Conventionally, various pile driving methods have been proposed for driving piles into the ground. For example, a hammering method is known in which a steel pipe pile is held by a leader, and the head of the steel pipe pile is hit and placed directly in the ground or built in a hole excavated in advance.
このように鋼管杭の頭部を地上で打撃して地中に打設する場合、大きい振動や騒音が発生するため、騒音及び振動の低減が可能な杭打ち方法が提案されている。例えば、鋼管杭の先端に杭先端支持器を配置し、ワイヤーによってハンマーを作動して杭先端支持器の底面を鋼管杭の内部から打撃する杭打ち方法が提案されている（例えば下記特許文献１）。 Thus, when the head of a steel pipe pile is struck on the ground and placed in the ground, large vibrations and noises are generated, so a pile driving method capable of reducing noise and vibrations has been proposed. For example, a pile driving method has been proposed in which a pile tip support device is disposed at the tip of a steel pipe pile, and a hammer is operated by a wire to hit the bottom surface of the pile tip support device from the inside of the steel pipe pile (for example, Patent Document 1 below). ).
詳細には、下記特許文献１では、吊りワイヤーによって吊持されるハンマーが、鋼管杭の上方よりこの鋼管杭内部に導入され、吊りワイヤーを巻き下げてゆくと、鋼管杭の先端部の底板にハンマーが到達する。この状態で鋼管杭内における所定位置まで吊りワイヤーを巻き上げ、その位置からハンマーを自由落下させることにより、鋼管杭の先端部に接合された底板が打撃される。下記特許文献１では、このように底板が打撃されることにより、鋼管杭は、地中に直接又は予め掘削された孔内に建て込んだ状態で、直進性良く打設される、とされている。 Specifically, in Patent Document 1 below, when a hammer that is suspended by a suspension wire is introduced into the steel pipe pile from above the steel pipe pile and the suspension wire is lowered, the bottom plate at the tip of the steel pipe pile is applied. The hammer reaches. In this state, the suspension wire is wound up to a predetermined position in the steel pipe pile, and the hammer is freely dropped from that position, whereby the bottom plate joined to the tip of the steel pipe pile is hit. In the following Patent Document 1, the bottom plate is struck in this manner, so that the steel pipe pile is placed with good straightness in a state of being built directly into the ground or in a hole excavated in advance. Yes.
上述した鋼管杭の打撃工法では、騒音及び振動を低減することは可能であるものの、以下の問題がある。すなわち、ハンマーによって打撃される打撃部は一定であるため、打撃部の変形や疲労破壊に繋がる可能性があり、ひいては杭としての性能への悪影響を及ぼすおそれもある。更に、ハンマーによる打撃部が鋼管杭の先端部に位置するため、鋼管杭の打設が進行するに伴ってハンマーの巻き上げ等に時間がかかり、作業性が悪くなるおそれもあった。 Although the steel pipe pile striking method described above can reduce noise and vibration, it has the following problems. In other words, since the hitting portion hit by the hammer is constant, there is a possibility that the hitting portion may be deformed or fatigued, and the performance as a pile may be adversely affected. Furthermore, since the hammer hitting portion is located at the tip of the steel pipe pile, it takes time to wind up the hammer as the steel pipe pile is driven, and the workability may be deteriorated.
そこで、本発明は、打撃部の変形や疲労破壊を抑えながら、作業性を向上させることができる杭打ち方法を提供することを目的とする。 Then, an object of this invention is to provide the pile driving method which can improve workability | operativity, suppressing the deformation | transformation and fatigue destruction of a hit | damage part.
本発明の一態様に係る杭打ち方法は、２以上の継杭から成る鋼管杭における第１継杭及び第２継杭の内部に一体に接合された板を、前記鋼管杭の内寸よりも小さい外寸を有する打撃装置で打撃して前記鋼管杭を地中に埋設する杭打ち方法であって、前記第１継杭を地中に建て込んだ状態で、前記第１継杭に接合された板を前記打撃装置で打撃することにより前記第１継杭を地中に打設し、前記第１継杭を所定位置まで打ち込んだ後に、前記第２継杭を前記第１継杭に対して同軸線上に継合し、前記第２継杭に接合された板を前記打撃装置で打撃することにより前記鋼管杭を地中に打設する。 In the pile driving method according to one aspect of the present invention, a plate integrally joined to the inside of the first joint pile and the second joint pile in the steel pipe pile composed of two or more joint piles is made larger than the inner dimension of the steel pipe pile. A pile driving method in which the steel pipe pile is buried in the ground by hitting with a striking device having a small outer size, and the first joint pile is joined to the first joint pile in a state of being built in the ground. The first joint pile is driven into the ground by striking a slab with the striking device, and after the first joint pile is driven to a predetermined position, the second joint pile is moved against the first joint pile. The steel pipe pile is driven into the ground by hitting the plate joined to the second coaxial pile and hitting the plate joined to the second joint pile with the hitting device.
この態様によれば、打撃装置によって打撃される板が継杭（第１継杭及び第２継杭）にも取り付けられているため、鋼管杭の地盤への貫入が進むに応じて打撃位置を変更することができる。このように打撃位置が変更されることにより、打撃装置による打撃部の変形や破壊が低減されるため、打撃部の疲労破壊が抑えられ、その結果、杭が施工中に損傷する可能性が減る。また、従来のように鋼管杭の先端部に取り付けた底板のみを打撃部とする場合、鋼管杭の打撃力および周面の摩擦抵抗力が部材に対して引張力として働くが、本発明のように打撃部を変更する場合、新たな打撃部よりも下部については部材に対して打撃力から周面の摩擦抵抗力を除いた力が圧縮力として働くため、部材の疲労破壊を抑えることができる。更に、第１継杭が所定位置まで打設された後、当該第１継杭に継合される第２継杭に接合された板を打撃するため、杭の先端を打撃する構成と比較して、打撃位置を地上に近い状態を保つことができ、作業性を向上させることができる。このように打撃位置が地上付近の一定範囲に保たれることで、打撃機が深い場所に位置する場合に比べて、機械を杭内部から引き上げる際の重量を軽くすることができる。また、釣り上げる際に使用するワイヤーなどが破断し、機械を取り出せなくなる危険性を抑えることができる（板があればワイヤーが破断しても打撃機は板より下に落下することを防ぐことができる）。また従来のように、鋼管杭の先端部に接合された底板を打撃する方式や、鋼管杭の上端を打撃する方式とした場合、例えば杭頭キャップ等大がかりな装置が必要となるが、本発明では、継杭に板を設けてその板を打撃して鋼管杭を埋設できるため、簡易な構成で施工管理を行うことができる。 According to this aspect, since the plate hit by the hitting device is also attached to the joint pile (the first joint pile and the second joint pile), the striking position is changed as the penetration of the steel pipe pile into the ground proceeds. Can be changed. By changing the hitting position in this way, deformation and destruction of the hitting portion by the hitting device are reduced, so fatigue damage of the hitting portion is suppressed, and as a result, the possibility that the pile is damaged during construction is reduced. . Further, when only the bottom plate attached to the tip of the steel pipe pile is used as the hitting portion as in the conventional case, the striking force of the steel pipe pile and the frictional resistance force of the peripheral surface work as tensile forces on the member. When the striking part is changed to a lower part, since the force obtained by subtracting the frictional resistance force of the peripheral surface from the striking force acts as a compressive force on the member below the new striking part, fatigue failure of the member can be suppressed. . Furthermore, after the first joint pile is driven to a predetermined position, in order to hit the plate joined to the second joint pile joined to the first joint pile, compared with the configuration in which the tip of the pile is hit. Thus, the hitting position can be kept close to the ground, and workability can be improved. By maintaining the hitting position within a certain range near the ground in this way, the weight when the machine is lifted from the inside of the pile can be reduced as compared with the case where the hitting machine is located in a deep place. Moreover, the wire used for fishing breaks and the risk of not being able to take out the machine can be suppressed (if there is a plate, the hammer can prevent the hammer from falling below the plate even if the wire breaks) ). In addition, when a method of hitting the bottom plate joined to the tip of the steel pipe pile or a method of hitting the upper end of the steel pipe pile as in the past, a large-scale device such as a pile head cap is required, for example. Then, since a steel pipe pile can be embed | buried by providing a board in a joint pile and hit | damaging the board, construction management can be performed with a simple structure.
上記態様において、前記板は、前記鋼管杭の内寸以上の外寸を有し、前記第１継杭及び前記第２継杭それぞれの先端に接合することも好ましい。 The said aspect WHEREIN: It is also preferable that the said board has an outer dimension more than the inner dimension of the said steel pipe pile, and it joins to the front-end | tip of each of the said 1st joint pile and the said 2nd joint pile.
上記態様において、前記打撃装置は、外部から供給される圧縮空気により上下動するピストンと前記ピストンが衝突することで可動する先端可動部とを内部に有し、前記圧縮空気によって運動エネルギーを得た前記ピストンが前記先端可動部への衝撃を通じて前記先端可動部へ運動エネルギーを伝達し、前記先端可動部が前記板に衝突することで、前記鋼管杭に推進力を与え、地中に埋設しても良い。 In the above aspect, the impact device has a piston that moves up and down by compressed air supplied from outside and a tip movable portion that moves when the piston collides, and obtains kinetic energy by the compressed air. The piston transmits kinetic energy to the tip movable portion through an impact on the tip movable portion, and the tip movable portion collides with the plate to give a propulsive force to the steel pipe pile and embed it in the ground. Also good.
本発明によれば、打撃部の変形や疲労破壊を抑えながら、作業性を向上させることができる杭打ち方法を提供することができる。 ADVANTAGE OF THE INVENTION According to this invention, the pile driving | running method which can improve workability | operativity can be provided, suppressing the deformation | transformation and fatigue destruction of a hit | damage part.
以下添付図面を参照しながら本発明の実施形態について説明する。尚、以下の好ましい実施形態の説明は、例示に過ぎず、本発明、その適用物或いはその用途を制限することを意図するものではない。 Embodiments of the present invention will be described below with reference to the accompanying drawings. It should be noted that the following description of the preferred embodiment is merely an example, and is not intended to limit the present invention, its application, or its use.
図１は、本実施形態における杭打ち方法に用いられる杭打ち機を説明するための模式図である。図２は、打撃装置としてハンマーを用いて板を打撃する構成を拡大して示す説明図である。 Drawing 1 is a mimetic diagram for explaining a pile driving machine used for a pile driving method in this embodiment. FIG. 2 is an explanatory diagram showing, in an enlarged manner, a configuration for hitting a plate using a hammer as a hitting device.
図１に示すように、杭打ち機１は、ベースマシン５１のワイヤー１０にてハンマー２０を吊り下げ、この状態で図示しないウィンチにより、ワイヤー１０の巻き上げや巻き下げをすることが可能な装置である。例えば、地盤に対して垂直方向に杭打ちを行う場合には、杭打ち機１のワイヤー１０にて吊り下げられたハンマー２０で、鋼管杭３０に接合された板４０を打撃することで、地盤内に鋼管杭３０が打ち込まれる。 As shown in FIG. 1, the pile driving machine 1 is a device capable of suspending the hammer 20 with the wire 10 of the base machine 51 and winding and lowering the wire 10 with a winch (not shown) in this state. is there. For example, when pile driving is performed in a direction perpendicular to the ground, the ground 40 is hit by hitting the plate 40 joined to the steel pipe pile 30 with the hammer 20 suspended by the wire 10 of the pile driving machine 1. The steel pipe pile 30 is driven in.
鋼管杭３０は、建造物の基礎として用いられる杭であり、本実施形態では、円筒状の分割杭３０ａ、３０ｂが同軸線上に継合されてなるものである。分割杭３０ａ、３０ｂは各々別個の部材として構成されており、施工現場において容易に取り付け可能になっている。このように鋼管杭３０を構成する部材がそれぞれ別個の部材として構成されているため、各部材を別の工場で製造するような場合でも、それぞれ直接施工現場に搬入することができ、運送費用等を削減することができる。 The steel pipe pile 30 is a pile used as a foundation of a building, and in this embodiment, cylindrical divided piles 30a and 30b are joined on a coaxial line. The divided piles 30a and 30b are each configured as a separate member, and can be easily attached at the construction site. Since the members constituting the steel pipe pile 30 are configured as separate members in this way, even when each member is manufactured in a separate factory, it can be directly carried into the construction site, transportation costs, etc. Can be reduced.
なお、本実施形態では、鋼管杭３０が２つの分割杭３０ａ、３０ｂから構成された例を説明するが、これに限定されず、３つ以上の分割杭から鋼管杭３０が構成されていても良い。 In addition, in this embodiment, although the steel pipe pile 30 demonstrates the example comprised from two division | segmentation piles 30a and 30b, it is not limited to this, Even if the steel pipe pile 30 is comprised from three or more division | segmentation piles good.
鋼管杭３０の一部を構成する分割杭３０ａ、３０ｂには、それぞれ板４０が接合されており、この板４０によって鋼管杭３０の一部が閉塞される。板４０は、鋼管杭３０の内寸と等しいか又はそれより大きい外寸を有し、例えば円形板状の部材が用いられる。しかしながらこれに限定されず、ハンマー２０による打撃力を受けることが可能であれば、例えば多角形の板状の部材等を適宜用いることができる。 A plate 40 is joined to each of the divided piles 30 a and 30 b constituting a part of the steel pipe pile 30, and a part of the steel pipe pile 30 is blocked by the plate 40. The plate 40 has an outer size that is equal to or larger than the inner size of the steel pipe pile 30, and for example, a circular plate-like member is used. However, the present invention is not limited to this. For example, a polygonal plate-like member or the like can be used as appropriate as long as the hammer 20 can receive a striking force.
なお、図１に示す例では、分割杭３０ｂ（中杭）の先端部に板４０が設けられているが、例えば分割杭３０ｂの中央部に板４０を取り付けてもよく、板４０が設けられる位置や個数は適宜変更可能である。また、板４０は、鋼管杭３０に一体に溶接接合されていても良いが、その接合方法は特に限定されるものではない。また、板４０は、鋼管杭３０内を閉塞するように設けても良いが、鋼管杭３０内を閉塞せずに（完全には仕切らずに）設けても良い。 In addition, in the example shown in FIG. 1, the board 40 is provided in the front-end | tip part of the division | segmentation pile 30b (medium pile), For example, you may attach the board 40 to the center part of the division | segmentation pile 30b, and the board 40 is provided. The position and number can be changed as appropriate. Moreover, although the board 40 may be integrally welded to the steel pipe pile 30, the joining method is not specifically limited. The plate 40 may be provided so as to close the inside of the steel pipe pile 30, but may be provided without closing the inside of the steel pipe pile 30 (without being completely partitioned).
図１及び図２に示すように、ワイヤー１０に吊持されるハンマー２０は、鋼管杭３０に対して鉛直下向きの力を加える打撃部材であり、鋼管杭３０の内径よりやや細い外径を呈して円筒状に形成されている。ハンマー２０はワイヤー１０を巻き下げると、鋼管杭３０の上方より降下し、鋼管杭３０の内部に導入される。ワイヤー１０を更に巻き下げてゆくと、鋼管杭３０の内部に設けられた板４０に到達する。この状態で、ハンマー２０が鋼管杭３０内における所定位置の高さになるまでワイヤー１０を巻き上げ、その位置からハンマー２０を自由落下させることにより、鋼管杭３０内部に設けられた板４０を打撃する。鋼管杭３０は、地中に直接又はアースオーガ等で予め掘削した孔内に建てこんだ状態で、このように板４０が打撃されることにより、直進性よく杭が打設される。 As shown in FIGS. 1 and 2, the hammer 20 suspended from the wire 10 is a striking member that applies a vertically downward force to the steel pipe pile 30, and has an outer diameter slightly smaller than the inner diameter of the steel pipe pile 30. It is formed in a cylindrical shape. When the hammer 20 lowers the wire 10, the hammer 20 descends from above the steel pipe pile 30 and is introduced into the steel pipe pile 30. When the wire 10 is further wound down, it reaches the plate 40 provided inside the steel pipe pile 30. In this state, the wire 10 is wound up until the hammer 20 reaches a predetermined height in the steel pipe pile 30, and the hammer 20 is freely dropped from that position, thereby hitting the plate 40 provided in the steel pipe pile 30. . The steel pipe pile 30 is built directly or directly in the ground or in a hole excavated in advance with an earth auger or the like, so that the pile 40 is driven with good straightness by hitting the plate 40 in this way.
続いて、分割杭３０ａ、３０ｂを継合して鋼管杭３０を地中に埋設する手順について説明する。図２（Ａ）は、ハンマー２０で分割杭３０ａ（第１継杭）の板４０を打撃する構成を拡大して示す説明図であり、図２（Ｂ）は、ハンマー２０で分割杭３０ｂ（第２継杭）の板４０を打撃する構成を拡大して示す説明図である。 Then, the procedure which joins the division | segmentation pile 30a, 30b and embeds the steel pipe pile 30 in the ground is demonstrated. FIG. 2A is an explanatory diagram showing an enlarged configuration of hitting the plate 40 of the divided pile 30a (first joint pile) with the hammer 20, and FIG. It is explanatory drawing which expands and shows the structure which strikes the board 40 of a 2nd joint pile.
まず、図２（Ａ）に示すように、分割杭３０ａを地中に建て込んだ状態で、分割杭３０ａに接合された板４０をハンマー２０で打撃し、分割杭３０ａを地中に埋設させる。 First, as shown in FIG. 2 (A), the plate 40 joined to the divided pile 30a is hit with the hammer 20 in a state where the divided pile 30a is built in the ground, and the divided pile 30a is buried in the ground. .
次いで、分割杭３０ａを所定位置まで打ち込んだ後に、分割杭３０ｂを分割杭３０ａに対して同軸線上に継合し、図２（Ｂ）に示すように、分割杭３０ｂに接合された板４０をハンマー２０で打撃することにより、鋼管杭３０を地中に埋設させる。 Next, after driving the divided pile 30a to a predetermined position, the divided pile 30b is joined to the divided pile 30a on the coaxial line, and the plate 40 joined to the divided pile 30b is joined as shown in FIG. By hitting with the hammer 20, the steel pipe pile 30 is buried in the ground.
なお、分割杭３０ｂを分割杭３０ａに継合するタイミングは任意ではあるが、ハンマー２０による打撃位置が地面に近い位置の状態で、分割杭３０ｂを継合することが好ましい。すなわち、分割杭３０ｂを分割杭３０ａに継合するときの好適な位置（所定位置）としては、分割杭３０ａに分割杭３０ｂを継合したと仮定したときの分割杭３０ｂに接合された板の高さＤ（図２（Ｂ）参照）が、地面から０ｍ以上２ｍ以下の高さの位置が好ましく、０．５ｍ以上１．５ｍ以下の高さの位置がより好ましい。 In addition, although the timing which joins the division | segmentation pile 30b to the division | segmentation pile 30a is arbitrary, it is preferable to join the division | segmentation pile 30b in the state where the hit position by the hammer 20 is a position close | similar to the ground. That is, as a suitable position (predetermined position) when joining the divided pile 30b to the divided pile 30a, a plate joined to the divided pile 30b when it is assumed that the divided pile 30b is joined to the divided pile 30a. The height D (see FIG. 2B) is preferably a position having a height of 0 m or more and 2 m or less from the ground, and more preferably a position having a height of 0.5 m or more and 1.5 m or less.
このように、ワイヤー１０にて吊り下げたハンマー２０を自由落下させることにより、鋼管杭３０の板４０を打撃するので、鋼管杭３０の頭部が地面より低い位置となっても更に打ち進めることができる。また本実施形態では、鋼管杭３０を構成する部材である継杭（分割杭３０ａ、３０ｂ）に板４０が設けられているので、施工現場において鋼管杭３０の貫入が進むに応じて継杭を取り付けることで、ハンマー２０による打撃位置を地上に近い状態を保つことができる。このため、作業性を向上させることができる。 Thus, since the hammer 40 suspended by the wire 10 is freely dropped, the plate 40 of the steel pipe pile 30 is hit, so that the head of the steel pipe pile 30 is further driven even if it is at a position lower than the ground. Can do. Moreover, in this embodiment, since the board 40 is provided in the joint pile (split pile 30a, 30b) which is a member which comprises the steel pipe pile 30, according to the penetration of the steel pipe pile 30 in a construction site, a joint pile is used. By attaching, the hit position by the hammer 20 can be kept close to the ground. For this reason, workability | operativity can be improved.
なお、本実施形態では、板を打撃する部材としてハンマー２０の例を説明したが、打撃装置として例えば自走式貫孔機７０を用いても良い。図３及び図４に、自走式貫孔機７０を用いた場合の例を示す。詳細には、図３は、杭打ち機の変形例を示す模式図である。図４（Ａ）は、打撃装置として自走式貫孔機７０を用いて分割杭３０ａ（第１継杭）の板４０に打撃力を付与する構成を拡大して示す説明図であり、図４（Ｂ）は、打撃装置として自走式貫孔機７０を用いて分割杭３０ｂ（第２継杭）の板４０に打撃力を付与する構成を拡大して示す説明図である。以下では、図１及び図２を参照して説明した構成及び手順（第１継杭及び第２継杭を継合して鋼管杭を地中に埋設する手順）と同じ部分については、その説明を省略する。 In the present embodiment, the example of the hammer 20 has been described as a member for hitting a plate. However, for example, a self-propelled through-hole machine 70 may be used as the hitting device. 3 and 4 show an example in which a self-propelled through-hole machine 70 is used. In detail, Drawing 3 is a mimetic diagram showing the modification of a pile driver. FIG. 4 (A) is an explanatory view showing, in an enlarged manner, a configuration in which a striking force is applied to the plate 40 of the divided pile 30a (first joint pile) using a self-propelled through-hole machine 70 as a striking device. 4 (B) is an explanatory view showing, in an enlarged manner, a configuration in which a striking force is applied to the plate 40 of the divided pile 30b (second joint pile) using a self-propelled through-hole machine 70 as a striking device. Below, about the same part as the structure and procedure (the procedure which embeds a 1st joint pile and a 2nd joint pile and embeds a steel pipe pile in the ground) demonstrated with reference to FIG.1 and FIG.2, the description Is omitted.
図３及び図４に示すように、外部に設置されたエアコンプレッサ６１から供給される圧縮空気をシリンダ７１内のピストン（図示略）へと導くエアホース６２を設け、エアコンプレッサ６１からエアホース６２を介して供給される圧縮空気によりピストンを鋼管杭内で上下動させる。外部から供給された圧縮空気によって運動エネルギーを得たピストンが、シリンダ７１内部に設けられた先端可動部（図示略）への衝撃を通じて先端可動部へ運動エネルギーを伝達し、当該先端可動部が板に衝突することで、鋼管杭３０に推進力を与え、地中に埋設する。 As shown in FIGS. 3 and 4, an air hose 62 that guides compressed air supplied from an external air compressor 61 to a piston (not shown) in the cylinder 71 is provided, and the air compressor 61 passes through the air hose 62. The piston is moved up and down in the steel pipe pile by the compressed air supplied. A piston that has obtained kinetic energy by compressed air supplied from the outside transmits kinetic energy to the tip movable portion through an impact on the tip movable portion (not shown) provided in the cylinder 71, and the tip movable portion is a plate. By impinging on the steel pipe pile 30, a propulsive force is given to the steel pipe pile 30, and it is buried in the ground.
以上説明した実施形態において、鋼管杭を構成する全ての継杭（分割杭）に板が接合されていなくても良く、少なくとも１つ以上の継杭に板が接合されていれば良い。すなわち、鋼管杭を構成する継杭の中には、板が接合されていない継杭も含まれる。このように板が接合されていない継杭を用いて杭を打ち込む場合には、板が接合されていない継杭の例えば先端部を打撃装置により打撃し、所定深さまで打撃した後に、板が接合された継杭を継合して当該板を打撃するようにしても良い。これにより、例えば表層数ｍなどに軟弱地盤がある場合の施工等では、先端部に大きな負荷はかからないので、地盤による抵抗が増加するまでは板が接合されていない継杭を用いて先端部を打撃する一方で、地盤による抵抗が増加する際には、板が接合された継杭を用いて打撃位置を変更する施工を実施することができる。このように板を設けていない継杭を含む杭打ち方法を採用することで、材料コストを低減することができ、打撃装置を取り出さずに杭の接続を実施することができる。 In embodiment described above, the board does not need to be joined to all the joint piles (split pile) which comprise a steel pipe pile, and the board should just be joined to the at least 1 or more joint pile. That is, the joint pile which comprises a steel pipe pile includes the joint pile to which the board is not joined. In this way, when driving a pile using a pile that has not been joined to the plate, for example, the tip of the pile that has not been joined to the plate is hit with a striking device and hit to a predetermined depth, and then the plate is joined. You may make it hit | damage the said board by joining the made joint pile. As a result, for example, when there is soft ground in the number of surface layers, etc., a large load is not applied to the tip part, so the tip part is used with a joint pile to which the plate is not joined until the resistance by the ground increases. On the other hand, when the resistance due to the ground increases, it is possible to perform construction to change the striking position using the joint pile to which the plates are joined. By adopting a pile driving method including a joint pile not provided with a plate in this way, the material cost can be reduced, and the piles can be connected without taking out the striking device.
以上、具体例を参照しつつ本発明の実施形態について説明した。しかし、本発明はこれらの具体例に限定されるものではない。すなわち、これら具体例に、当業者が適宜設計変更を加えたものも、本発明の特徴を備えている限り、本発明の範囲に包含される。前述した各具体例が備える各要素およびその配置、材料、条件、形状、サイズなどは、例示したものに限定されるわけではなく適宜変更することができる。 The embodiments of the present invention have been described above with reference to specific examples. However, the present invention is not limited to these specific examples. In other words, those specific examples that have been appropriately modified by those skilled in the art are also included in the scope of the present invention as long as they have the characteristics of the present invention. Each element included in each of the specific examples described above and their arrangement, material, condition, shape, size, and the like are not limited to those illustrated, and can be appropriately changed.
１０：ワイヤー
２０：ハンマー
２０：打撃装置
３０：鋼管杭
３０ａ；分割杭（第１継杭）
３０ｂ；分割杭（第２継杭）
４０；板
10: wire 20: hammer 20: striking device 30: steel pipe pile 30a; split pile (first joint pile)
30b; Split pile (second joint pile)
40; board
Claims (3)
前記第１継杭を地中に建て込んだ状態で、前記第１継杭に接合された板を前記打撃装置で打撃することにより前記第１継杭を地中に打設し、
前記第１継杭を所定位置まで打ち込んだ後に、前記第２継杭を前記第１継杭に対して同軸線上に継合し、前記第２継杭に接合された板を前記打撃装置で打撃することにより前記鋼管杭を地中に打設する、杭打ち方法。 A plate integrally joined to the inside of the first joint pile and the second joint pile in the steel pipe pile composed of two or more joint piles is struck with a striking device having an outer dimension smaller than the inner dimension of the steel pipe pile. A pile driving method in which a steel pipe pile is buried in the ground,
With the first joint pile built in the ground, the first joint pile is driven into the ground by striking the plate joined to the first joint pile with the striking device,
After driving the first joint pile to a predetermined position, the second joint pile is joined to the first joint pile on a coaxial line, and the plate joined to the second joint pile is hit with the hitting device. A pile driving method in which the steel pipe pile is driven into the ground.
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| JP2017001983A JP2018111961A (en) | 2017-01-10 | 2017-01-10 | Pile driving method |
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| JP2017001983A JP2018111961A (en) | 2017-01-10 | 2017-01-10 | Pile driving method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS527109A (en) * | 1975-06-26 | 1977-01-20 | Kazuharu Fujito | Method of driving enlargeddhead foundation piles |
| JPS59173426A (en) * | 1983-03-23 | 1984-10-01 | Sekisui Prefab Homes Ltd | Striker |
| JPH06235217A (en) * | 1992-09-19 | 1994-08-23 | Tracto Technik Paul Schmidt Spezialmas Kg | Piling boring machine |
| JPH1072825A (en) * | 1996-08-30 | 1998-03-17 | Geotop Corp | Construction method of footing pile |
-
2017
- 2017-01-10 JP JP2017001983A patent/JP2018111961A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS527109A (en) * | 1975-06-26 | 1977-01-20 | Kazuharu Fujito | Method of driving enlargeddhead foundation piles |
| JPS59173426A (en) * | 1983-03-23 | 1984-10-01 | Sekisui Prefab Homes Ltd | Striker |
| JPH06235217A (en) * | 1992-09-19 | 1994-08-23 | Tracto Technik Paul Schmidt Spezialmas Kg | Piling boring machine |
| JPH1072825A (en) * | 1996-08-30 | 1998-03-17 | Geotop Corp | Construction method of footing pile |
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