JP6155561B2 - Pile-foundation joint structure and method - Google Patents
Pile-foundation joint structure and method Download PDFInfo
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- JP6155561B2 JP6155561B2 JP2012134959A JP2012134959A JP6155561B2 JP 6155561 B2 JP6155561 B2 JP 6155561B2 JP 2012134959 A JP2012134959 A JP 2012134959A JP 2012134959 A JP2012134959 A JP 2012134959A JP 6155561 B2 JP6155561 B2 JP 6155561B2
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Description
本発明は、杭と基礎との接合構造及び方法に関する。 The present invention relates to a joining structure and method of a pile and a foundation.
地震時の水平力により杭頭部と基礎との接合部に生じる曲げモーメントを緩和することを目的として、杭頭部を基礎に埋設せずに基礎の底面に接するように配し、杭頭部と基礎とをこれらに跨る鉄筋で接合したものが知られている（例えば、特許文献１、２参照）。特許文献１に記載の杭と基礎との接合構造では、上記鉄筋の全体を杭頭部と基礎とに付着させることにより杭頭部と基礎とを接合している。また、特許文献２に記載の杭と基礎との接合構造では、杭頭部に生じた曲げモーメントによる杭頭部のコンクリートの圧壊を抑制することを目的として、杭頭部に位置する上記鉄筋の中間部分を杭頭部に付着させない付着切り部としている（図７参照）。 In order to alleviate the bending moment generated at the joint between the pile head and the foundation due to the horizontal force during an earthquake, the pile head is placed in contact with the bottom of the foundation without being embedded in the foundation. And a foundation joined with a reinforcing bar that straddles them are known (see, for example, Patent Documents 1 and 2). In the joint structure of the pile and the foundation described in Patent Document 1, the pile head and the foundation are joined by attaching the entire reinforcing bar to the pile head and the foundation. Moreover, in the joining structure of the pile and foundation described in Patent Document 2, for the purpose of suppressing concrete collapse of the pile head due to the bending moment generated in the pile head, The intermediate portion is an attachment cut portion that does not attach to the pile head (see FIG. 7).
特許文献１、２に記載の杭と基礎との接合構造では、地震時にせん断力を基礎から杭へ上記鉄筋を介して伝達させることはできるが、上記鉄筋の全体又は中間部分以外が基礎と杭頭部とに付着されており、杭頭部が基礎に上記鉄筋を介して拘束されている。このため、地震時に杭頭部の回転が妨げられ、杭頭部と基礎との接合部に生じる曲げモーメントを効果的に緩和することができない。 In the joint structure between the pile and the foundation described in Patent Documents 1 and 2, shear force can be transmitted from the foundation to the pile through the reinforcing bar during an earthquake, but the foundation and the pile other than the whole or intermediate part of the reinforcing bar The pile head is constrained to the foundation via the reinforcing bars. For this reason, rotation of a pile head is prevented at the time of an earthquake, and the bending moment which arises in the junction part of a pile head and a foundation cannot be relieved effectively.
ここで、基礎及び杭頭部との少なくとも一方と、上記鉄筋の全体との付着を切って鉄筋を差筋の状態にすることにより、杭頭部が基礎に上記鉄筋を介して拘束されないようにすることができ、杭頭部と基礎との接合部に生じる曲げモーメントを効果的に緩和することができる。また、杭頭部の支圧と鉄筋とにより基礎から杭へせん断力を伝達することができる。 Here, by cutting the adhesion between at least one of the foundation and the pile head and the whole of the reinforcing bar so that the reinforcing bar is in a differential bar state, the pile head is not restrained by the foundation via the reinforcing bar. The bending moment generated at the joint between the pile head and the foundation can be effectively reduced. Moreover, the shear force can be transmitted from the foundation to the pile by the bearing pressure of the pile head and the reinforcing bar.
しかしながら、極大地震等により基礎に大きな浮き上がりが生じた場合には、杭頭部の支圧で基礎から杭へせん断力を伝達できなくなり、基礎から杭へのせん断力の伝達が、鉄筋のダボ抵抗のみで行われることにより、基礎と杭頭部との接合部におけるせん断剛性が小さくなり、基礎から杭へ大きなせん断力を伝達できなくなる。 However, when a large lift occurs in the foundation due to a quake, etc., the shear force cannot be transmitted from the foundation to the pile due to the bearing pressure of the pile head, and the transmission of the shear force from the foundation to the pile is caused by the dowel resistance of the reinforcing bar. As a result, the shear rigidity at the joint between the foundation and the pile head is reduced, and a large shear force cannot be transmitted from the foundation to the pile.
本発明は、上記事情に鑑みてなされたものであり、地震時に杭頭部と基礎との接合部に生じる曲げモーメントを効果的に緩和すると共に、基礎に浮き上がりが生じた場合でも、基礎から杭へのせん断力の伝達性能を確保することを課題とするものである。 The present invention has been made in view of the above circumstances, effectively relieving the bending moment generated at the joint between the pile head and the foundation during an earthquake, and from the foundation to the pile even when the foundation is lifted. It is an object to ensure the transmission performance of the shearing force to.
上記課題を解決するために、本発明に係る杭と基礎との接合構造は、せん断抵抗材が杭頭部と基礎とに跨るように配され、前記せん断抵抗材の前記杭頭部に配された部分の全体と前記せん断抵抗材の前記基礎に配された部分の全体との少なくとも一方は、当該部分が配された前記杭頭部又は前記基礎と付着しないように構成され、前記杭頭部が前記基礎に設けられた凹部に配され、前記杭頭部の外周面と前記基礎とが非接触となるように構成されていることを特徴とする。 In order to solve the above-mentioned problem, the joint structure between a pile and a foundation according to the present invention is arranged so that the shear resistance material straddles the pile head and the foundation, and is arranged on the pile head of the shear resistance material. And at least one of the entire portion disposed on the foundation of the shear resistance material is configured not to adhere to the pile head or the foundation on which the portion is disposed, and the pile head Is arranged in a recess provided in the foundation, and the outer peripheral surface of the pile head and the foundation are not in contact with each other.
上記杭と基礎との接合構造において、前記杭頭部の上面と前記基礎との間に縁切り層が設けられてもよい。 In the joint structure between the pile and the foundation, an edge cutting layer may be provided between the upper surface of the pile head and the foundation.
上記杭と基礎との接合構造において、杭は既製杭であってもよく、その場合、前記せん断抵抗材は、前記既製杭の頭部に打設された中詰めコンクリートに配されてもよい。 In the joint structure of the pile and the foundation, the pile may be a ready-made pile, and in that case, the shear resistance material may be disposed on the filling concrete cast on the head of the ready-made pile.
上記杭と基礎との接合構造において、前記既製杭は既製コンクリート杭であってもよい。 In the joint structure between the pile and the foundation, the ready-made pile may be a ready-made concrete pile.
また、本発明に係る杭と基礎との接合方法は、せん断抵抗材を杭頭部と基礎とに跨るように配し、前記せん断抵抗材の前記杭頭部に配する部分の全体と前記せん断抵抗材の前記基礎に配する部分の全体との少なくとも一方を、当該部分を配する前記杭頭部又は前記基礎と付着しないように構成し、前記杭頭部を前記基礎に設けた凹部に配し、前記杭頭部の外周面と前記基礎とが非接触となるように構成することを特徴とする。 Moreover, the method for joining the pile and the foundation according to the present invention is such that the shear resistance material is disposed so as to straddle the pile head and the foundation, and the entire portion of the shear resistance material disposed on the pile head and the shear are arranged. At least one of the parts of the resistance material arranged on the foundation is configured not to adhere to the pile head or the foundation on which the part is arranged, and the pile head is arranged in a recess provided on the foundation. And it is comprised so that the outer peripheral surface of the said pile head and the said foundation may become non-contact.
本発明によれば、地震時に杭頭部と基礎との接合部に生じる曲げモーメントを効果的に緩和すると共に、基礎に浮き上がりが生じた場合でも、基礎から杭へのせん断力の伝達性能を確保することができる。 According to the present invention, the bending moment generated at the joint between the pile head and the foundation during an earthquake is effectively mitigated, and the transmission performance of the shear force from the foundation to the pile is ensured even when the foundation is lifted. can do.
以下、本発明の一実施形態を、図面を参照しながら説明する。図１は、一実施形態に係る杭２０と基礎３０との接合構造１０を示す立断面図である。この図に示すように、接合構造１０では、ＰＨＣ杭やＰＲＣ杭等の既製コンクリート杭である杭２０の頭部（以下、杭頭部という）２０Ａが、基礎３０の底部に形成された凹部３１に配されている。 Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Drawing 1 is an elevation sectional view showing joined structure 10 of pile 20 and foundation 30 concerning one embodiment. As shown in this figure, in the joint structure 10, a head portion (hereinafter referred to as a pile head portion) 20 </ b> A of a pile 20 that is a ready-made concrete pile such as a PHC pile or a PRC pile is formed in a concave portion 31 formed at the bottom of the foundation 30. Is arranged.
また、接合構造１０では、杭２０には、中詰めコンクリート２２が打設されており、丸鋼である複数の差筋５０が、中詰めコンクリート２２と基礎３０とに跨るように配されている。なお、複数の差筋５０は、平面視における縦横（紙面における左右方向及び奥行方向）に並べて配されている。 Further, in the joint structure 10, the filling concrete 22 is placed on the pile 20, and a plurality of differential bars 50 made of round steel are arranged so as to straddle the filling concrete 22 and the foundation 30. . The plurality of difference bars 50 are arranged side by side in the vertical and horizontal directions (left and right direction and depth direction in the drawing).
杭頭部２０Ａの外側には鋼製のキャップ２３が取り付けられている。また、縁切り層４０が、中詰めコンクリート２２の上面と基礎３０との間に介在している。該縁切り層４０は、中詰めコンクリート２２と基礎３０とのコンクリートを打ち分け、中詰めコンクリート２２の上面に表面処理を施すことにより形成されており、該縁切り層４０により、中詰めコンクリート２２と基礎３０とが、互いに離間し易くなっている。 A steel cap 23 is attached to the outside of the pile head 20A. Moreover, the edge cutting layer 40 is interposed between the upper surface of the filling concrete 22 and the foundation 30. The edge-cutting layer 40 is formed by laying concrete between the inside-filled concrete 22 and the foundation 30 and applying a surface treatment to the upper surface of the inside-filled concrete 22. 30 are easily separated from each other.
ここで、差筋５０の上側は基礎３０内に下側は中詰めコンクリート２２内に配されているが、差筋５０の上側と基礎３０のコンクリート、及び差筋５０の下側と中詰めコンクリート２２とは、これらの間にグリース等の潤滑剤を介在させること等により、付着しないように構成されている。 Here, the upper side of the difference bar 50 is arranged in the foundation 30 and the lower side is arranged in the filling concrete 22. However, the upper side of the difference bar 50 and the concrete of the foundation 30, and the lower side of the difference bar 50 and the filling concrete. 22 is configured so as not to adhere by interposing a lubricant such as grease between them.
ここで、杭頭部２０Ａの外周面と基礎３０の凹部３１の側面との間には１０ｍｍ程度の隙間が設けられており、この隙間に、ゴムチューブやスポンジやスタイロフォーム等の圧縮力により収縮する材料で作製された緩衝材６０が嵌め込まれることで、杭頭部２０Ａの外周面と基礎３０の凹部３１の側面とが非接触となっている。 Here, a gap of about 10 mm is provided between the outer peripheral surface of the pile head 20 </ b> A and the side surface of the recess 31 of the foundation 30, and the gap shrinks due to a compressive force of a rubber tube, sponge, styrofoam, or the like. By fitting the cushioning material 60 made of the material, the outer peripheral surface of the pile head 20A and the side surface of the recess 31 of the foundation 30 are not in contact with each other.
なお、杭頭部２０Ａの基礎３０への埋込深さや杭頭部２０Ａの外周面と基礎３０の凹部３１の側面との間隔等は、杭頭部２０Ａと基礎３０との接合部に要求されるせん断剛性や曲げ応力の緩和度等に応じて適宜設定すればよい。 In addition, the embedding depth of the pile head 20 </ b> A into the foundation 30, the interval between the outer peripheral surface of the pile head 20 </ b> A and the side surface of the recess 31 of the foundation 30 are required for the joint between the pile head 20 </ b> A and the foundation 30. What is necessary is just to set suitably according to the shear rigidity, the relaxation degree of bending stress, etc.
図２及び図３は、杭２０と基礎３０との接合部の施工手順を示す立断面図である。まず、図２に示すように、杭２０を杭頭部２０Ａが地盤から突出するように打設してその内部に中詰めコンクリート２２を打設する。この際、中詰めコンクリート２２は、杭２０の内部に型枠を設置して打設したり、杭２０内に土砂を詰めてその上に打設したりする等、従来から知られている方法により打設する。 2 and 3 are elevation sectional views showing a construction procedure of a joint portion between the pile 20 and the foundation 30. FIG. First, as shown in FIG. 2, the pile 20 is driven so that the pile head 20 </ b> A protrudes from the ground, and the filling concrete 22 is driven therein. At this time, the filling concrete 22 is a conventionally known method such as placing a formwork in the inside of the pile 20 and placing the earth in the pile 20 and placing it on the pile 20. By placing.
次に、図３に示すように、中詰めコンクリート２２が硬化する前に差筋５０の下側を中詰めコンクリート２２に挿入し、中詰めコンクリート２２の上面に基礎３０と絶縁するための表面処理を施す。この際、差筋５０にグリース等の潤滑剤を塗布することにより、硬化後の中詰めコンクリート２２と差筋５０の下側とが付着しないようにする。 Next, as shown in FIG. 3, before the filling concrete 22 is hardened, the lower side of the differential bar 50 is inserted into the filling concrete 22, and the surface treatment for insulating the foundation 30 on the upper surface of the filling concrete 22. Apply. At this time, a lubricant such as grease is applied to the differential reinforcement 50 so that the solidified concrete 22 after curing and the lower side of the differential reinforcement 50 do not adhere.
そして、杭頭部２０Ａの外周面に緩衝材６０を全周に亘って接着する。その後、杭頭部２０Ａが基礎３０に埋設されるように、基礎３０のコンクリートを打設する。この際、差筋５０にグリース等の潤滑剤を塗布することにより、硬化後の基礎３０のコンクリートと差筋５０の上側とが付着しないようにする。 And the buffer material 60 is adhere | attached over the outer peripheral surface of 20 A of pile heads over the perimeter. Thereafter, the concrete of the foundation 30 is placed so that the pile head 20 </ b> A is embedded in the foundation 30. At this time, a lubricant such as grease is applied to the differential reinforcement 50 so that the concrete of the foundation 30 after curing and the upper side of the differential reinforcement 50 do not adhere.
図４は、本実施形態に係る杭２０と基礎３０との接合構造１０の作用を示す立断面図である。この図に示すように、地震時に杭２０と基礎３０との接合部に対して水平力が作用し、基礎３０に浮き上がりが生じない場合には、杭頭部２０Ａの支圧と、基礎３０と中詰めコンクリート２２に差し込まれた差筋５０とにより、基礎３０から杭２０へせん断力Ｐが伝達される。即ち、差筋５０のダボ効果により、基礎３０と杭２０との間のせん断力Ｐの伝達性能が高められる。 FIG. 4 is an elevational sectional view showing an operation of the joint structure 10 between the pile 20 and the foundation 30 according to the present embodiment. As shown in this figure, when a horizontal force acts on the joint between the pile 20 and the foundation 30 during an earthquake and the foundation 30 does not lift up, the bearing pressure of the pile head 20A and the foundation 30 The shearing force P is transmitted from the foundation 30 to the pile 20 by the differential bar 50 inserted into the filling concrete 22. That is, due to the dowel effect of the differential bar 50, the transmission performance of the shear force P between the foundation 30 and the pile 20 is enhanced.
一方で、基礎３０から杭２０へせん断力Ｐが伝達されて、杭２０が杭頭部２０Ａを支点として回転しようとする際、差筋５０が、中詰めコンクリート２２に付着しておらず、中詰めコンクリート２２に対して相対的に上下に動くことにより、杭２０の回転を妨げない。また、杭頭部２０Ａの外周面と基礎３０とが非接触となっており、これらが絶縁されていることにより、杭２０の回転が妨げられない。これにより、杭頭部２０Ａと基礎３０との固定度を効果的に低下させることができ、地震時に杭頭部２０Ａと基礎３０との接合部に生じる曲げモーメントを効果的に低下させることができる。従って、杭２０や基礎３０に要求される耐力を抑えることができるため、杭２０や基礎３０の断面の増大や鉄筋の配筋量の増加を抑えることができる。 On the other hand, when the shear force P is transmitted from the foundation 30 to the pile 20 and the pile 20 tries to rotate about the pile head 20A as a fulcrum, the difference bar 50 is not attached to the filling concrete 22, By moving up and down relatively with respect to the stuffed concrete 22, the rotation of the pile 20 is not hindered. Moreover, the outer peripheral surface of the pile head 20A and the foundation 30 are not in contact with each other, and the rotation of the pile 20 is not hindered because these are insulated. Thereby, the fixed degree of pile head 20A and foundation 30 can be reduced effectively, and the bending moment which arises in the junction of pile head 20A and foundation 30 at the time of an earthquake can be reduced effectively. . Therefore, since the proof stress requested | required of the pile 20 and the foundation 30 can be suppressed, the increase in the cross section of the pile 20 or the foundation 30 and the increase in the amount of reinforcement arrangement | positioning can be suppressed.
特に、本実施形態では、差筋５０の上側についても基礎３０に付着させず、また、中詰めコンクリート２２の上面と基礎３０の凹部３１の平面との間を絶縁してこれらを離間し易く構成したことにより、杭頭部２０Ａと基礎３０との固定度をより一層効果的に低下させることができ、地震時に杭頭部２０Ａと基礎３０との接合部に生じる曲げモーメントをより一層効果的に低下させることができる。 In particular, in the present embodiment, the upper side of the differential bar 50 is not attached to the foundation 30, and the upper surface of the filling concrete 22 and the flat surface of the recess 31 of the foundation 30 are insulated so that they can be separated easily. As a result, the fixing degree between the pile head 20A and the foundation 30 can be reduced more effectively, and the bending moment generated at the joint between the pile head 20A and the foundation 30 during an earthquake can be more effectively reduced. Can be reduced.
ここで、図５に示すように、異形鉄筋５１を杭２０及び基礎３０に付着させた場合には、当該異形鉄筋５１にはせん断力Ｑのみならず、引張力Ｒも作用するため、当該異形鉄筋５１のせん断力Ｑに対する耐力が低下する。これに対して、本実施形態では、差筋５０を杭２０や基礎３０に付着させないようにしたことにより、差筋５０に作用する引張力を低減させることができ、これにより、差筋５０のせん断力に対する耐力を高めることができる。 Here, as shown in FIG. 5, when the deformed reinforcing bar 51 is attached to the pile 20 and the foundation 30, not only the shearing force Q but also the tensile force R acts on the deformed reinforcing bar 51. The proof stress with respect to the shearing force Q of the reinforcing bar 51 is reduced. On the other hand, in the present embodiment, the tensile force acting on the differential bar 50 can be reduced by preventing the differential bar 50 from adhering to the pile 20 or the foundation 30, and thereby, The resistance to shearing force can be increased.
図６は、本実施形態に係る杭２０と基礎３０との接合構造１０の極大地震時の作用を示す立断面図である。この図に示すように、極大地震時に基礎３０に浮き上がりが生じた場合には、杭頭部２０Ａの支圧によっては基礎３０から杭２０へせん断力Ｐを伝達されないが、杭頭部２０Ａが基礎３０の凹部３１に嵌め込まれているため、基礎３０の杭頭部２０Ａの周囲のコンクリートにより、基礎３０から杭２０へせん断力Ｐが伝達される。 FIG. 6 is an elevational sectional view showing the action of the joining structure 10 between the pile 20 and the foundation 30 according to the present embodiment at the time of the maximum earthquake. As shown in this figure, when the foundation 30 is lifted during a quake, the shear force P is not transmitted from the foundation 30 to the pile 20 depending on the bearing pressure of the pile head 20A. The shear force P is transmitted from the foundation 30 to the pile 20 by the concrete around the pile head 20 </ b> A of the foundation 30 because it is fitted in the recess 31 of 30.
即ち、極大地震時に基礎３０に浮き上がりが生じた場合でも、差筋５０のダボ抵抗のみではなく、基礎３０のコンクリートのせん断抵抗によっても基礎３０から杭２０へのせん断力Ｐの伝達が行われることになり、基礎３０と杭頭部２０Ａとの接合部におけるせん断剛性を十分に高め、基礎３０から杭２０へのせん断力Ｐの伝達性を確保することができる。 That is, even when the foundation 30 is lifted during a quake, the shear force P is transmitted from the foundation 30 to the pile 20 not only by the dowel resistance of the differential bar 50 but also by the shear resistance of the concrete of the foundation 30. Thus, the shear rigidity at the joint between the foundation 30 and the pile head 20A can be sufficiently increased, and the transmission of the shear force P from the foundation 30 to the pile 20 can be ensured.
なお、上述の実施形態は、本発明の理解を容易にするためのものであり、本発明を限定するものではない。本発明はその趣旨を逸脱することなく、変更、改良され得ると共に本発明にはその等価物が含まれることは勿論である。例えば、上述の実施形態では、既製杭として既製コンクリート杭を例に挙げて本発明を説明したが、既製杭としての鋼管杭にも本発明を適用できる。また、杭として既製コンクリート杭を例に挙げて本発明を説明したが、杭としての場所打ちコンクリート杭にも本発明を適用できる。さらに、単杭に限らず、壁杭にも本発明を適用できる。 In addition, the above-mentioned embodiment is for making an understanding of this invention easy, and does not limit this invention. It goes without saying that the present invention can be changed and improved without departing from the gist thereof, and that the present invention includes equivalents thereof. For example, in the above-described embodiment, the present invention has been described by taking a ready-made concrete pile as an example of a ready-made pile, but the present invention can also be applied to a steel pipe pile as a ready-made pile. Although the present invention has been described by taking a ready-made concrete pile as an example of the pile, the present invention can also be applied to a cast-in-place concrete pile as a pile. Furthermore, this invention is applicable not only to a single pile but to a wall pile.
また、上述の実施形態では、せん断抵抗材として丸鋼を例に挙げたが、ＣＦＲＰ製の棒材等の他のせん断抵抗材も適用できる。また、せん断抵抗材と杭及び基礎とを付着させないために、これらの間にグリース等の潤滑剤を介在させることは必須ではなく、該潤滑剤を介在させなくても、せん断抵抗材と杭及び基礎とが付着しないのであれば、該潤滑剤を省略してもよい。さらに、せん断抵抗材を杭及び基礎の双方に付着させないことは必須ではなく、杭には付着させずに基礎には付着させたり、杭には付着させるが基礎には付着させなかったりしてもよい。 Moreover, in the above-mentioned embodiment, although the round steel was mentioned as an example as a shear resistance material, other shear resistance materials, such as a bar material made from CFRP, are applicable. Further, in order to prevent the shear resistance material and the pile and the foundation from adhering, it is not essential to interpose a lubricant such as grease between them, and even if the lubricant is not interposed, the shear resistance material and the pile and If the foundation does not adhere, the lubricant may be omitted. Furthermore, it is not essential that the shear resistance material does not adhere to both the pile and the foundation, even if it adheres to the foundation without adhering to the pile or adheres to the pile but not to the foundation. Good.
また、上述の実施形態では、杭の天端面と基礎の底面との間の縁切り層を、中詰めコンクリート２２と基礎３０のコンクリートとを打ち分けて、中詰めコンクリートと基礎の底面とに表面処理を施すことにより形成したが、ビニルシート等のシート状の縁切り材を中詰めコンクリート２２の上に敷設することにより形成してもよい。さらに、杭の天端面と基礎の底面との間に縁切り層を形成することは必須ではない。 Moreover, in the above-mentioned embodiment, the edge-cutting layer between the top end face of the pile and the bottom surface of the foundation is divided into the concrete of the filling concrete 22 and the concrete of the foundation 30, and the surface treatment is performed on the filling concrete and the bottom face of the foundation. However, it may be formed by laying a sheet-like edge cutting material such as a vinyl sheet on the filling concrete 22. Furthermore, it is not essential to form an edge cutting layer between the top end face of the pile and the bottom face of the foundation.
１０ 接合構造、２０ 杭、２０Ａ 杭頭部、２１ 天端面、２２ 中詰めコンクリート、２３ キャップ、３０ 基礎、３１ 凹部、４０ 縁切り層、５０ 差筋（せん断抵抗材）、５１ 異形鉄筋、６０ 緩衝材 10 joint structure, 20 pile, 20A pile head, 21 top end face, 22 filling concrete, 23 cap, 30 foundation, 31 recess, 40 edge cutting layer, 50 differential reinforcement (shear resistance material), 51 deformed reinforcement, 60 cushioning material
Claims (5)
前記せん断抵抗材の前記杭頭部に配された部分の全体と前記せん断抵抗材の前記基礎に配された部分の全体との少なくとも一方は、当該部分が配された前記杭頭部又は前記基礎と付着しないように構成され、
前記杭頭部が前記基礎に設けられた凹部に配され、前記杭頭部の外周面と前記基礎とが非接触となるように構成されていることを特徴とする杭と基礎との接合構造。 The shear resistance material is arranged so as to straddle the pile head and the foundation,
At least one of the whole part arranged on the pile head of the shear resistance material and the whole part arranged on the foundation of the shear resistance material is the pile head or the foundation on which the part is arranged. Configured to not stick with
The pile-to-foundation structure characterized in that the pile head is arranged in a recess provided in the foundation, and the outer peripheral surface of the pile head and the foundation are not in contact with each other. .
前記せん断抵抗材は、前記既製杭の頭部に打設された中詰めコンクリートに配されていることを特徴とする請求項１又は請求項２に記載の杭と基礎との接合構造。 The pile is a ready-made pile,
The pile-foundation joint structure according to claim 1 or 2, wherein the shear resistance material is disposed on a filling concrete placed on a head of the ready-made pile.
前記せん断抵抗材の前記杭頭部に配する部分の全体と前記せん断抵抗材の前記基礎に配する部分の全体との少なくとも一方を、当該部分を配する前記杭頭部又は前記基礎と付着しないように構成し、
前記杭頭部を前記基礎に設けた凹部に配し、前記杭頭部の外周面と前記基礎とが非接触となるように構成することを特徴とする杭と基礎との接合方法。 Arrange the shear resistance material across the pile head and foundation,
At least one of the whole part arranged on the pile head of the shear resistance material and the whole part arranged on the foundation of the shear resistance material does not adhere to the pile head or the foundation on which the part is arranged. Configured as
A method for joining a pile and a foundation, wherein the pile head is disposed in a recess provided in the foundation, and the outer peripheral surface of the pile head and the foundation are not in contact with each other.
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