JPH10266198A - Steel-framed under-reamed pile by precast pile and constructing method thereof - Google Patents
Steel-framed under-reamed pile by precast pile and constructing method thereofInfo
- Publication number
- JPH10266198A JPH10266198A JP8560797A JP8560797A JPH10266198A JP H10266198 A JPH10266198 A JP H10266198A JP 8560797 A JP8560797 A JP 8560797A JP 8560797 A JP8560797 A JP 8560797A JP H10266198 A JPH10266198 A JP H10266198A
- Authority
- JP
- Japan
- Prior art keywords
- pile
- peripheral surface
- arm
- hollow portion
- guide piece
- 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
Landscapes
- Piles And Underground Anchors (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、コンクリートパイ
ル等の既成杭の下端に鉄骨により補強された杭径より大
きい拡底部を設ける拡底杭、詳細には杭下端の拡底部が
鉄骨を介して的確に補強されたコンクリートにより築造
され、この拡底部面積のすべてが杭の支持力算定におい
て有効断面積と認められるような、既成杭による有鉄骨
拡底杭とその築造法に関するものである。BACKGROUND OF THE INVENTION The present invention relates to an expanded pile in which an enlarged pile having a diameter larger than the diameter of a pile reinforced by a steel frame is provided at the lower end of an existing pile such as a concrete pile. The present invention relates to a steel-filled pile with existing piles and a method of constructing the pile so that the entire area of the expanded bottom is recognized as an effective cross-sectional area in calculating the bearing capacity of the pile.
【０００２】[0002]
【従来の技術】従来より、杭の支持力及び引き抜き抵抗
を増加させるための手段として、杭の下端に拡底部を設
ける拡底杭が広く知られている。この場合、拡底杭とし
ては、現場打ち杭の下端に拡底部を設けるものと、既成
杭の下端に拡底部を設けるものとがあり、いずれも予め
杭孔の底部に杭径よりも大径な孔底拡開部を掘削してお
き、この孔底拡開部内にコンクリートを打設して拡底部
を設ける。2. Description of the Related Art Conventionally, as a means for increasing the supporting force and pull-out resistance of a pile, an expanded pile having an expanded bottom at the lower end of the pile has been widely known. In this case, there are two types of expanded piles: one with an expanded bottom at the lower end of the cast-in-place pile, and another with an expanded bottom at the lower end of the existing pile, both of which have a diameter larger than the diameter of the pile beforehand at the bottom of the pile hole. A hole bottom widening portion is excavated, and concrete is poured into the hole bottom widening portion to provide the wide bottom portion.
【０００３】この拡底杭としては、杭の下端に設けるコ
ンクリート拡底部が単に無鉄筋の状態で杭径よりも拡大
されているというだけでは、杭の限界支持力には対応で
きず、かつ引き抜き抵抗にも対応できないという問題が
あり、そのため従来より、孔底拡開部内で鉄筋もしくは
鉄筋に代わる補強材を杭径よりも大きくなるように拡大
させてからコンクリートを打設して、鉄筋等の補強材に
より補強された杭径よりも大きいコンクリート拡底部を
設ける手段が提唱されている。[0003] As for this expanded pile, simply increasing the concrete expanded portion provided at the lower end of the pile beyond the diameter of the pile in a state of no rebar is not enough to cope with the limit bearing capacity of the pile, and the pull-out resistance is not increased. Therefore, it has been conventionally difficult to cope with this problem.For this reason, reinforcing steel or other reinforcing materials in place of the reinforcing steel in the hole bottom widening area has been expanded so that it is larger than the pile diameter, and then concrete is cast to reinforce the reinforcing steel, etc. Means for providing a concrete expanded bottom larger than the pile diameter reinforced by the material have been proposed.
【０００４】また、孔底拡開部内で鉄筋もしくは鉄筋に
代わる補強材を杭径よりも大きくなるように拡大させる
手段としては、孔内に挿入した鉄筋篭もしくは既成杭あ
るいはロッド等を孔内で回転することで鉄筋もしくは補
強材を拡大する方式と、鉄筋篭もしくは既成杭あるいは
ロッド等を押し下げることで鉄筋もしくは補強材を拡大
する方式、例えば特開昭５８−５１９号、実公平２−６
１０６号あるいは特開平５−３３９９４１号等が知られ
ている。As means for expanding a reinforcing bar or a reinforcing material in place of a reinforcing bar so as to be larger than a pile diameter in a hole bottom widening portion, a reinforcing bar cage, a pre-made pile, a rod, or the like inserted in the hole is inserted in the hole. A method of expanding a reinforcing bar or a reinforcing material by rotating, or a method of expanding a reinforcing bar or a reinforcing material by pushing down a reinforcing bar or a pre-formed pile or a rod, for example, Japanese Patent Application Laid-Open No. 58-519, Jitsuho 2-6
No. 106 or JP-A-5-339941 is known.
【０００５】前記押し下げ拡大方式による拡底杭のう
ち、特開昭５８−５１９号及び実公平２−６１０６号の
拡底杭は現場打ち杭によるもの、特開平５−３３９９４
１号の拡底杭は鋼管杭であって、いずれも主鉄筋篭なり
杭体の下端に外側へ拡大する拡張鉄筋部材を取り付け、
孔内で主鉄筋篭なり杭体を押し下げて拡張鉄筋部材を孔
底へ押し付けることで拡張鉄筋部材を孔底拡開部内へ拡
大させるものである。[0005] Among the expanded piles by the push-down expansion method, the expanded piles disclosed in JP-A-58-519 and Japanese Utility Model Publication No. 2-6106 are cast-in-place piles.
The expanded pile of No. 1 is a steel pipe pile, each of which is a main reinforcing cage, and an expanded reinforcing member expanding outward is attached to the lower end of the pile body.
The expanded reinforcing bar member is expanded into the hole bottom opening by pressing down the expanded reinforcing bar member into the hole bottom by pressing down the main reinforcing bar cage pile body in the hole.
【０００６】[0006]
【発明が解決すべき課題】しかしながら、上記の押し下
げ拡大方式による拡底杭のように、鉄筋篭もしくは既成
杭あるいはロッド等を押し下げることで鉄筋もしくは補
強材を拡大する場合には、予め鉄筋もしくは補強材に孔
底内部で拡開するような手段を設けなければならないの
で、そのための加工費が嵩むという問題がある。However, when expanding a reinforcing bar or reinforcing material by pushing down a reinforced cage, an existing pile, or a rod, as in the case of an expanded pile using the above-described push-down expanding method, a reinforcing bar or reinforcing material is required in advance. Therefore, there must be provided a means for expanding the inside of the bottom of the hole.
【０００７】また、このような押し下げ拡大方式による
拡底杭のうち、特開平５−３３９９４１号のような既成
杭の下端に拡底部を設けるものにおいては、杭の下端に
杭体を押し下げることで孔底拡開部内へ拡大させるよう
な拡張鉄筋部材を取付けなければならないので、拡張鉄
筋部材が孔底拡開部内で拡大された後に、杭の荷重によ
って拡張鉄筋部材が押し潰されないように、杭を地上に
配置したクレーン等によって孔内に吊下げ支持して、次
の工程として孔底拡開部内へ打設されたコンクリートが
完全に硬化するまでの比較的長い期間にわたって、杭の
吊下げ状態を維持しておかなければならないという問題
がある。[0007] In addition, among the expanded piles using the push-down expansion method, those in which an expanded bottom is provided at the lower end of an existing pile as disclosed in JP-A-5-339941, the hole is formed by pushing down the pile at the lower end of the pile. Since the reinforcing steel members must be installed so that they can be expanded into the bottom expansion, the piles should not be crushed by the load of the pile after the expansion reinforcing members have been expanded inside the hole bottom expansion. Suspended in the hole by a crane etc. placed on the ground, and as the next step, the suspended state of the pile for a relatively long period until the concrete poured into the hole bottom widening part is completely hardened There is a problem that must be maintained.
【０００８】[0008]
【課題を解決するための手段】本発明は、上記のような
従来における拡底杭の問題点に鑑み、コンクリートパイ
ルのような重量のある既成杭であっても、下端に鉄骨等
により補強された拡底部を支障なく設けることのできる
既成杭による有鉄骨拡底杭およびこの杭を用いた築造法
の提供を目的としたものである。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the conventional enlarged bottom pile, and the lower end thereof is reinforced with a steel frame or the like, even if the pile is heavy, such as a concrete pile. It is an object of the present invention to provide a steel-framed expanded pile using an existing pile that can be provided with an expanded bottom without any trouble, and a construction method using the pile.
【０００９】請求項１は有鉄骨拡底杭の築造法であり、
既成杭の下端部杭壁に予め複数個の横孔を放射状に開設
して、これらの横孔内に杭壁の厚さより長いアームを水
平に挿通し、杭中空部内周面に突出する前記アームの内
端には予め中央部が杭中空部中心方向へ膨出した案内片
を固定する共に、杭体の外周面に突出する前記アームの
外端には該杭の長さ方向に沿って配列した複数本の補強
鉄筋を夫々連結し、予め前記案内片が杭中空部内中心方
向へ突出して外側の補強鉄筋が杭外周面と接触する状態
で、杭下端部を予めセメントミルクが充填された杭孔拡
開部内へ挿通したあと、杭中空部内上方から重錘等を押
し通して、前記案内片を介してアームを杭体外方向へ移
動することで補強鉄筋を杭外周面とは離れた外側の杭孔
拡開部内へ押し出して、杭孔拡開部内に外側が鉄筋で一
体に補強された拡底杭を築造することを特徴とする。[0009] Claim 1 is a method of constructing a steel-reinforced bottom pile.
A plurality of lateral holes are previously formed radially in the lower end pile wall of the existing pile, and an arm longer than the thickness of the pile wall is horizontally inserted into these lateral holes, and the arm protrudes from the pile inner peripheral surface. At the inner end of the pile, a guide piece whose center part has been expanded in advance toward the center of the pile hollow portion is fixed, and the outer end of the arm protruding from the outer peripheral surface of the pile body is arranged along the length direction of the pile. The plurality of reinforcing bars are connected to each other, and the guide piece protrudes in the center direction of the pile hollow portion in advance and the outer reinforcing bar contacts the outer peripheral surface of the pile. After being inserted into the hole expanding portion, the weight is pushed from above the hollow portion of the pile, and the arm is moved to the outside of the pile via the guide piece, so that the reinforcing steel is moved outside the pile outer surface and away from the outer peripheral surface of the pile. It is pushed out into the hole opening, and the outside of the pile hole opening is reinforced integrally with reinforcing steel. Characterized by construction of the pile.
【００１０】請求項２は、有鉄骨拡底杭の構成に関する
ものであり、既成杭の下端部杭壁に予め複数個の横孔を
放射状に開設して、これらの横孔内に杭壁の厚さより長
いアームを水平に挿通し、杭中空部内周面に突出する前
記アームの内端には予め中央部が杭中空部中心方向へ膨
出した案内片を固定する共に、杭体の外周面に突出する
前記アームの外端には該杭の長さ方向に沿って配列した
複数本の補強鉄筋を夫々連結し、予め前記案内片が杭中
空部内中心方向へ突出して外側の補強鉄筋が杭外周面と
接触するように配置したことを特徴とする。A second aspect of the present invention relates to a configuration of a steel-pile expanded bottom pile, in which a plurality of lateral holes are previously formed radially in the lower end pile wall of the existing pile, and the thickness of the pile wall is formed in these lateral holes. A longer arm is inserted horizontally, and a guide piece whose center portion is bulged in the center direction of the pile hollow portion is fixed to the inner end of the arm projecting from the inner peripheral surface of the pile hollow portion, and the outer peripheral surface of the pile body is fixed. A plurality of reinforcing bars arranged along the length direction of the pile are connected to the outer ends of the protruding arms, respectively, and the guide pieces protrude in advance toward the center of the hollow portion of the pile, and the reinforcing bars on the outer side are connected to the outer periphery of the pile. It is characterized by being arranged so as to be in contact with a surface.
【００１１】杭中空部内に設けられる案内片は、アーム
の内端に取り付けられた複数個の縦長の金属板により構
成することが好ましい。The guide piece provided in the hollow portion of the pile is preferably constituted by a plurality of vertically long metal plates attached to the inner end of the arm.
【００１２】[0012]
【作用】本発明の拡底杭では、既成杭の下端部杭壁に放
射状に設けた複数個の横孔内に杭壁の厚さより長いアー
ムを挿通して、これらのアームの内端に予め中央部が杭
中空部中心方向へ膨出した案内片を固定する共に、杭体
の外周面に突出する前記アームの外端には該杭の長さ方
向に沿って配列した複数本の補強鉄筋を夫々連結し、予
め前記案内片が杭中空部内中心方向へ突出して外側の補
強鉄筋が杭外周面と接触するように配置したので、この
杭の下端部を予めセメントミルクが充填された杭孔拡開
部内に挿入したのち、杭中空部内上方から重錘等を押し
通して、通過する重錘等により夫々の案内片を杭内周面
方向に押し付けると、アームが杭体の外側方向へ移動す
ることにより、杭外周面に配列された補強鉄筋が杭外周
面とは離れた外側の杭孔拡開部内へ押し出されて、杭孔
拡開部内に外側が鉄筋で一体に補強された拡底杭を築造
することができる。In the expanded pile according to the present invention, arms longer than the thickness of the pile wall are inserted into a plurality of lateral holes provided radially in the lower end pile wall of the existing pile, and a center is previously inserted into the inner ends of these arms. A plurality of reinforcing bars arranged along the length direction of the pile are provided at the outer end of the arm, which protrudes from the outer peripheral surface of the pile body, while fixing the guide piece whose part has bulged toward the center of the pile hollow part. The piles are connected so that the guide pieces project in advance toward the center of the hollow portion of the pile, and the reinforcing reinforcing bar on the outside is in contact with the outer peripheral surface of the pile. After being inserted into the open part, the weight is pushed from above the hollow part of the pile, and when the respective guide pieces are pressed toward the inner peripheral surface of the pile by the passing weight, the arm moves outward of the pile body. The reinforcement reinforcing bars arranged on the outer peripheral surface of the pile Is pushed into Kuiana expanding portion, it is possible to construction a 拡底 pile outside reinforced integrally with reinforcing bars in Kuiana expanding portion.
【００１３】[0013]
【実施例】次に本発明に係る拡底杭を図面に示す実施例
により説明すると、図１はこの拡底杭の長さ方向に沿っ
た断面図であり、コンクリートパイル等の既成杭４が挿
入される杭孔１は、予め孔底２に杭孔１の内径より大き
い内径の杭孔拡開部３が設けられているとともに、前記
既成杭４の下端部杭壁に予め複数個の横孔５が放射状に
開設されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an expanded pile according to the present invention will be described with reference to an embodiment shown in the drawings. FIG. 1 is a cross-sectional view along the longitudinal direction of the expanded pile, in which an existing pile 4 such as a concrete pile is inserted. The pile hole 1 is provided with a pile hole expanding portion 3 having an inner diameter larger than the inner diameter of the pile hole 1 at the hole bottom 2 in advance, and a plurality of horizontal holes 5 in the lower end pile wall of the existing pile 4. Are established radially.
【００１４】前記の横孔５内には、杭壁の厚さより長い
アーム６が夫々水平に挿通され、杭中空部７内の杭体内
周面に突出する前記アーム６の内端には、予め中央部８
ａが杭中空部７の中心方向へ膨出した案内片８が固定さ
れると共に、杭体外周面に突出する前記アーム６の外端
には、該杭の長さ方向に沿うようにして杭体を囲むよう
に配列された複数本の補強鉄筋９が夫々連結されてい
る。Arms 6 that are longer than the thickness of the pile wall are inserted horizontally into the lateral holes 5, respectively. Central part 8
The guide piece 8 whose a bulges toward the center of the pile hollow portion 7 is fixed, and the outer end of the arm 6 protruding from the outer peripheral surface of the pile body is provided at the outer end of the arm 6 along the length direction of the pile. A plurality of reinforcing bars 9 arranged so as to surround the body are connected to each other.
【００１５】前記案内片８は、例えば、図３に示すよう
に、細長い薄い金属板の中央部８ａを円弧状に湾曲する
ように折り曲げて、この中央部８ａの内面に前記アーム
６の内端が連結固定されるとともに、前記案内片８の上
下両端８ｂ，８ｃを杭体内周面に接触支持させて、アー
ム６の内端が杭中空部７の中心方向へ引き込まれた状態
を維持するようになっており、そのため、アーム６の外
端に固定される補強鉄筋９はいずれも杭体外周面に密着
して配列されている。As shown in FIG. 3, for example, the guide piece 8 is formed by bending a central portion 8a of an elongated thin metal plate so as to be curved in an arc shape, and an inner end of the arm 6 is provided on an inner surface of the central portion 8a. Are connected and fixed, and the upper and lower ends 8b and 8c of the guide piece 8 are brought into contact with and supported by the peripheral surface of the pile body so that the inner end of the arm 6 is pulled toward the center of the hollow part 7 of the pile. Therefore, the reinforcing reinforcing bars 9 fixed to the outer ends of the arms 6 are all arranged in close contact with the outer peripheral surface of the pile body.
【００１６】杭体外周面に配列される夫々の補強鉄筋９
の間には、予め余裕をもった長さのワイヤーロープ１０
が、横鉄筋として夫々の補強鉄筋９を横方向に連結する
ように、複数段にわたって設けられている。Reinforcing reinforcing bars 9 arranged on the outer peripheral surface of the pile body
In between, wire rope 10 of a sufficient length in advance
However, a plurality of horizontal reinforcing bars are provided so as to connect the respective reinforcing reinforcing bars 9 in the horizontal direction.
【００１７】図１のように、杭孔１を設ける過程で孔底
２に内径の大きい杭孔拡開部３を設けて、この杭孔拡開
部３が設けられた時点で該杭孔拡開部３内にセメントミ
ルク１１を充填し、次いで、杭４を下端部外周の補強鉄
筋９が杭孔拡開部３内に位置するようにして杭孔１内に
挿入する。As shown in FIG. 1, in the process of providing the pile hole 1, a pile hole expanding portion 3 having a large inner diameter is provided at the hole bottom 2, and when the pile hole expanding portion 3 is provided, the pile hole expanding portion 3 is provided. The cement milk 11 is filled in the opening 3, and then the pile 4 is inserted into the pile hole 1 such that the reinforcing reinforcing bar 9 on the outer periphery of the lower end is located in the hole 3.
【００１８】杭下端が杭孔拡開部３内の孔底２上に位置
するように杭孔１内に挿入されたのち、直ちに杭中空部
７内の上方から、ロッド１３の下端に取り付けた前記案
内片８の中央部８ａ内に嵌まり込む外径１２ａと、上下
両面に傾斜面１２ｂ，１２ｃをもった算盤珠形の重錘１
２を押し通して、夫々の案内片８を杭内周面方向に押し
付けると、アーム６が杭体の外側方向へ移動することに
より、杭外周面に配列された補強鉄筋９が杭外周面とは
離れた外側の杭孔拡開部３内へ押し出されて、杭孔拡開
部３内に外側が鉄筋９で一体に補強された拡底杭を築造
することができる。After the pile lower end was inserted into the pile hole 1 so as to be located on the hole bottom 2 in the pile hole expanding portion 3, it was immediately attached to the lower end of the rod 13 from above in the pile hollow portion 7. An abacus bead-shaped weight 1 having an outer diameter 12a fitted into the central portion 8a of the guide piece 8 and inclined surfaces 12b and 12c on both upper and lower surfaces.
When the respective guide pieces 8 are pushed in the direction of the inner peripheral surface of the pile by pushing through the arm 2, the arm 6 moves to the outer side of the pile body, so that the reinforcing reinforcing bars 9 arranged on the outer peripheral surface of the pile are separated from the outer peripheral surface of the pile. It is extruded into the pile hole widening portion 3 on the outer side, and an expanded pile whose outside is integrally reinforced by the reinforcing bar 9 can be built in the pile hole widening portion 3.
【００１９】前記案内片８は中央部８ａが膨出している
ので、重錘１２の通過に際して傾斜した下面１２ｃと適
切に滑動して徐々に横方向へ移動され、アーム６を杭外
側方向へ移動する。重錘１２が通過し終えると、案内片
８はやや開いた状態で杭内周面に密着し、この状態でア
ーム６が移動し終えて補強鉄筋９を杭外周面とは離れた
外側へ突出する。補強鉄筋９が杭外周面とは離れた外側
へ突出すると、補強鉄筋９と杭外周面との間にセメント
ミルクが介入するので案内片８は独自の力で元の位置に
戻ることがない。また、その状態で前記の重錘１２を上
方へ引き上げる際には、重錘１２の傾斜した上面１２ｂ
が案内片８の中央部８ａと滑動して支障なく上方へ引き
抜くことができる。Since the central portion 8a of the guide piece 8 is bulged, the guide piece 8 slides appropriately with the inclined lower surface 12c when passing through the weight 12, and is gradually moved in the lateral direction to move the arm 6 in the outward direction of the pile. I do. When the weight 12 has passed, the guide piece 8 is in a slightly open state and closely adheres to the inner peripheral surface of the pile, and in this state, the arm 6 has finished moving and the reinforcing reinforcing bar 9 projects outwardly away from the outer peripheral surface of the pile. I do. When the reinforcing bar 9 protrudes outward away from the outer peripheral surface of the pile, the cement piece intervenes between the reinforcing bar 9 and the outer peripheral surface of the pile, so that the guide piece 8 does not return to its original position by its own force. When the weight 12 is lifted upward in this state, the inclined upper surface 12b of the weight 12
Slides with the central portion 8a of the guide piece 8 and can be pulled upward without any trouble.
【００２０】[0020]
【発明の効果】以上に述べたように、本発明の拡底杭と
この杭を用いた築造法によれば、既成杭４の下端部に放
射状に設けた横孔５内にアーム９を挿通し、これらのア
ームの内端に中央部８ａが杭中空部中心方向へ膨出した
案内片を固定したので、杭４を杭孔拡開部３内にセメン
トミルク１１の充填された杭孔１内へ挿入したのち、杭
中空部５内に重錘１３等を押し通して夫々の案内片８を
杭壁方向へ押し開くだけの簡単な操作により、杭の外周
面に配列した補強鉄筋９を杭外周面とは離れた外側の杭
孔拡開部３内へ押し出して、鉄筋として配置することが
できる。As described above, according to the expanded pile according to the present invention and the construction method using this pile, the arm 9 is inserted into the horizontal hole 5 provided radially at the lower end of the existing pile 4. Since the guide piece whose central portion 8a bulges toward the center of the pile hollow portion is fixed to the inner ends of these arms, the pile 4 is placed in the pile hole expanding portion 3 in the pile hole 1 filled with the cement milk 11. After inserting the weight 13 and the like into the hollow part 5 of the pile, the reinforcing bars 9 arranged on the outer peripheral surface of the pile are moved to the outer periphery of the pile by a simple operation of pushing and opening the respective guide pieces 8 toward the pile wall. It can be extruded into the pile hole widening portion 3 on the outer side away from the surface, and can be arranged as a reinforcing bar.
【００２１】その結果、この発明の拡底杭によれば、コ
ンクリートパイルのような既成杭でも杭孔拡開部３内
に、外側の鉄筋９により一体に補強された杭体と杭孔と
の摩擦力が強大で、しかも杭孔拡開部内における鉄筋９
により補強された拡底部面積のすべてが杭の支持力算定
において有効断面積と認められるような、既成杭と一体
的な構造体としての有鉄骨拡底杭を安定かつ能率的に築
造することができる。As a result, according to the expanded pile according to the present invention, even when the pile is made of concrete, such as a concrete pile, the friction between the pile body integrally reinforced by the outer reinforcing bar 9 and the pile hole in the pile hole expanding portion 3. Reinforcing bars 9 in the pile opening
Can be built stably and efficiently as a steel-framed expanded pile as a structure that is integrated with a pre-built pile, in which the entire area of the expanded bottom reinforced by the pile is recognized as an effective cross-sectional area in the calculation of the bearing capacity of the pile .
【図１】本発明に係る有鉄骨拡底杭の築造前の構成を示
す中央従断面図。FIG. 1 is a central sectional view showing a configuration of a steel-reinforced bottom pile according to the present invention before construction.
【図２】図１のＡ−Ａ線における断面図。FIG. 2 is a sectional view taken along line AA of FIG.
【図３】案内片の構成の一例を示す斜視図。FIG. 3 is a perspective view showing an example of a configuration of a guide piece.
【図４】本発明に係る有鉄骨拡底杭の築造後の構成を示
す中央従断面図。FIG. 4 is a center sectional view showing the configuration of a ferrous bottom pile according to the present invention after construction.
【図５】図４のＢ−Ｂ線における断面図。FIG. 5 is a sectional view taken along line BB in FIG. 4;
１：杭孔 ２：孔底 ３：杭孔拡開部 ４：既成杭 ５：横孔 ６：アーム ７：杭中空部 ８：案内片 ９：補強鉄筋 １０：ワイヤロープ １１：セメントミルク １２：重錘 １３：ロッド 1: Pile hole 2: Hole bottom 3: Pile hole widening part 4: Prefabricated pile 5: Lateral hole 6: Arm 7: Pile hollow part 8: Guide piece 9: Reinforcing bar 10: Wire rope 11: Cement milk 12: Heavy Weight 13: Rod
Claims (3)
を放射状に開設して、これらの横孔内に杭壁の厚さより
長いアームを水平に挿通し、杭中空部内周面に突出する
前記アームの内端には予め中央部が杭中空部中心方向へ
膨出した案内片を固定する共に、杭体の外周面に突出す
る前記アームの外端には該杭の長さ方向に沿って配列し
た複数本の補強鉄筋を夫々連結し、予め前記案内片が杭
中空部内中心方向へ突出して外側の補強鉄筋が杭外周面
と接触する状態で、杭下端部を予めセメントミルクが充
填された杭孔拡開部内へ挿通したあと、杭中空部内上方
から重錘等を押し通して、前記案内片を介してアームを
杭体外方向へ移動することで補強鉄筋を杭外周面とは離
れた外側の杭孔拡開部内へ押し出して、杭孔拡開部内に
外側が鉄筋で一体に補強された拡底杭を築造する既成杭
による有鉄骨拡底杭の築造法。1. A plurality of lateral holes are previously formed radially in a lower end pile wall of an existing pile, and an arm longer than the thickness of the pile wall is inserted horizontally into these lateral holes to form an inner peripheral surface of the pile hollow portion. At the inner end of the arm protruding, a guide piece whose central portion has previously protruded toward the center of the pile hollow portion is fixed, and at the outer end of the arm protruding from the outer peripheral surface of the pile, the length of the pile is fixed. A plurality of reinforcing bars arranged along the direction are connected to each other, and the lower end of the pile is preliminarily cemented with the guide piece protruding in the center direction of the hollow portion of the pile and the outer reinforcing bar contacting the outer peripheral surface of the pile in advance. After being inserted into the pile hole expanding portion filled with, the weight is pushed from above the pile hollow portion, and the arm is moved to the outside of the pile via the guide piece, so that the reinforcing bar is connected to the outer peripheral surface of the pile. Extruded into the pile hole expansion part on the outside, and the outside is integrated with the reinforcing bar inside the pile hole expansion part. A method of building a steel-reinforced bottom pile using a pre-made pile to build a reinforced bottom pile.
を放射状に開設して、これらの横孔内に杭壁の厚さより
長いアームを水平に挿通し、杭中空部内周面に突出する
前記アームの内端には予め中央部が杭中空部中心方向へ
膨出した案内片を固定する共に、杭体の外周面に突出す
る前記アームの外端には該杭の長さ方向に沿って配列し
た複数本の補強鉄筋を夫々連結し、予め前記案内片が杭
中空部内中心方向へ突出して外側の補強鉄筋が杭外周面
と接触するように配置したことを特徴とする既成杭によ
る有鉄骨拡底杭。2. A plurality of lateral holes are radially opened in advance in a lower end pile wall of the existing pile, and an arm longer than the thickness of the pile wall is inserted horizontally into these lateral holes to form an inner peripheral surface of the hollow portion of the pile. At the inner end of the arm protruding, a guide piece whose central portion has previously protruded toward the center of the pile hollow portion is fixed, and at the outer end of the arm protruding from the outer peripheral surface of the pile, the length of the pile is fixed. A plurality of reinforcing bars arranged along the direction are connected to each other, and the guide pieces are arranged in advance so as to protrude toward the center of the hollow portion of the pile so that the outer reinforcing bars are in contact with the outer peripheral surface of the pile. Steel-framed expanded pile with pile.
た複数個の細長い金属板からなっている請求項２の既成
杭による有鉄骨拡底杭。3. The pile according to claim 2, wherein the guide piece comprises a plurality of elongated metal plates attached to the inner end of the arm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9085607A JP3021383B2 (en) | 1997-03-21 | 1997-03-21 | Precast pile with existing steel pile and its construction method. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9085607A JP3021383B2 (en) | 1997-03-21 | 1997-03-21 | Precast pile with existing steel pile and its construction method. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10266198A true JPH10266198A (en) | 1998-10-06 |
| JP3021383B2 JP3021383B2 (en) | 2000-03-15 |
Family
ID=13863526
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9085607A Expired - Lifetime JP3021383B2 (en) | 1997-03-21 | 1997-03-21 | Precast pile with existing steel pile and its construction method. |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3021383B2 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013058596A1 (en) * | 2011-10-21 | 2013-04-25 | Sohn Il-Jun | Extension-type casing and method for reinforcing soft ground |
| CN104153350A (en) * | 2014-07-10 | 2014-11-19 | 大连大金马基础建设有限公司 | Octagonal meshed water-stopping rectangular pile of support |
| CN104153351A (en) * | 2014-07-10 | 2014-11-19 | 大连大金马基础建设有限公司 | Biconvex semicircular meshed water-stopping pile of support |
| CN104234036A (en) * | 2014-07-10 | 2014-12-24 | 大连大金马基础建设有限公司 | Circular arc secant water-stop pile for supporting |
| CN110409428A (en) * | 2019-07-01 | 2019-11-05 | 东莞市建安集团有限公司 | Tube pile structure and its construction method |
| CN112028571A (en) * | 2020-08-21 | 2020-12-04 | 湖北中南岩土工程有限公司 | Cast-in-place pile for enhancing bearing strength of deep and thick miscellaneous fill area and construction method |
| CN114411704A (en) * | 2022-02-28 | 2022-04-29 | 浙江大学建筑设计研究院有限公司 | Pin-connected panel precast concrete side's stake |
| CN115404880A (en) * | 2022-09-28 | 2022-11-29 | 山西冶金岩土工程勘察有限公司 | Supporting pile construction process |
-
1997
- 1997-03-21 JP JP9085607A patent/JP3021383B2/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013058596A1 (en) * | 2011-10-21 | 2013-04-25 | Sohn Il-Jun | Extension-type casing and method for reinforcing soft ground |
| CN104153350A (en) * | 2014-07-10 | 2014-11-19 | 大连大金马基础建设有限公司 | Octagonal meshed water-stopping rectangular pile of support |
| CN104153351A (en) * | 2014-07-10 | 2014-11-19 | 大连大金马基础建设有限公司 | Biconvex semicircular meshed water-stopping pile of support |
| CN104234036A (en) * | 2014-07-10 | 2014-12-24 | 大连大金马基础建设有限公司 | Circular arc secant water-stop pile for supporting |
| CN104153351B (en) * | 2014-07-10 | 2017-03-29 | 大连大金马基础建设有限公司 | Supporting biconvex semicircle is engaged water-seal pile |
| CN110409428A (en) * | 2019-07-01 | 2019-11-05 | 东莞市建安集团有限公司 | Tube pile structure and its construction method |
| CN110409428B (en) * | 2019-07-01 | 2021-04-27 | 东莞市建安集团有限公司 | Tubular pile structure and construction method thereof |
| CN112028571A (en) * | 2020-08-21 | 2020-12-04 | 湖北中南岩土工程有限公司 | Cast-in-place pile for enhancing bearing strength of deep and thick miscellaneous fill area and construction method |
| CN112028571B (en) * | 2020-08-21 | 2021-06-18 | 湖北中南岩土工程有限公司 | Cast-in-place pile for enhancing bearing strength of deep and thick miscellaneous fill area and construction method |
| CN114411704A (en) * | 2022-02-28 | 2022-04-29 | 浙江大学建筑设计研究院有限公司 | Pin-connected panel precast concrete side's stake |
| CN114411704B (en) * | 2022-02-28 | 2023-11-28 | 浙江大学建筑设计研究院有限公司 | Assembled precast concrete square pile |
| CN115404880A (en) * | 2022-09-28 | 2022-11-29 | 山西冶金岩土工程勘察有限公司 | Supporting pile construction process |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3021383B2 (en) | 2000-03-15 |
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