JP4427603B1

JP4427603B1 - Construction method of building foundation and joint board for building foundation construction

Info

Publication number: JP4427603B1
Application number: JP2009107657A
Authority: JP
Inventors: 謙吾太田
Original assignee: 株式会社西部工建
Priority date: 2009-04-27
Filing date: 2009-04-27
Publication date: 2010-03-10
Anticipated expiration: 2029-04-27
Also published as: JP2010255329A

Abstract

【課題】沈設された鋼管杭の中心軸が芯ずれや杭先端の切断平面が傾いていても建屋構造物の柱を傾かせることなく鋼管杭の杭先端に連結支持でき、さらに建屋構造物の柱を連結支持する鋼管杭の杭先端側を手間やコストが余分にかかる溶接を用いることなく補強することにある。
【解決手段】鋼管杭６の杭先端６１と建屋構造物の柱７の下端のベース板７１との間に施工用ジョイント盤１を取り付け、鋼管杭６の杭先端側内部６２及び杭先端側６３の外周側に注入し硬化したモルタル２１で鋼管杭６の杭先端側６３に施工用ジョイント盤１を固定し、施工用ジョイント盤１の調整連結板３の移動調整及び調整連結板３のネジ棒３１に螺合する下部締付金具３２と支承突起３４で微調整する。
【選択図】図５PROBLEM TO BE SOLVED: To connect and support a pile end of a steel pipe pile without tilting the pillar of the building structure even if the center axis of the submerged steel pipe pile is misaligned or the cutting plane of the pile tip is inclined, and further, the building structure The purpose is to reinforce the pile tip side of the steel pipe pile that connects and supports the column without using welding that is laborious and costly.
A construction joint board 1 is attached between a pile tip 61 of a steel pipe pile 6 and a base plate 71 at the lower end of a column 7 of a building structure, and a pile tip side inside 62 and a pile tip side 63 of the steel pipe pile 6 are attached. The construction joint board 1 is fixed to the pile tip side 63 of the steel pipe pile 6 with the mortar 21 injected and hardened on the outer peripheral side of the steel plate, and the movement adjustment of the adjustment connection plate 3 of the construction joint board 1 and the screw rod of the adjustment connection plate 3 Fine adjustment is performed by the lower fastening metal fitting 32 and the support projection 34 which are screwed onto the steel 31.
[Selection] Figure 5

Description

この発明は、地盤に沈設した鋼管杭の杭先端に建屋構造物の柱を連結支持させる技術に係り、特に、沈設された鋼管杭の中心軸が芯ずれを起こしていて建屋構造物の柱の中心軸を設置予定位置で鋼管杭の杭先端に連結支持でき、しかも鋼管杭の杭先端の切断平面が傾いていても建屋構造物の柱を傾かせることなく鋼管杭の杭先端に連結支持でき、さらに建屋構造物の柱を連結支持する鋼管杭の杭先端側を手間やコストが余分にかかる溶接を用いることなく補強する建屋基礎の施工法及び建屋基礎の施工用ジョイント盤に関するものである。 The present invention relates to a technique for connecting and supporting a pillar of a building structure to the tip of a pile of steel pipe piles submerged in the ground, and in particular, the center axis of the submerged steel pipe pile causes misalignment, and The central axis can be connected and supported to the pile tip of the steel pipe pile at the planned installation position, and even if the cutting plane of the pile tip of the steel pipe pile is inclined, it can be connected and supported to the pile tip of the steel pipe pile without tilting the column of the building structure. Furthermore, the present invention relates to a building foundation construction method and a building foundation construction joint board that reinforces the pile tip side of the steel pipe pile that connects and supports the pillars of the building structure without using labor or costly welding.

建屋基礎の施工法として、特開平１１−１８１７９０（特許第３０９５３７６号）がある。この施工法は、地盤に沈設した鋼管杭を所望長さで切断し、中央にボルトを嵌合した杭頭キャップを杭先端に嵌合すると共に通孔を有する二分割された杭側ベースプレートで杭先端を挟み込んだ後杭先端に溶着し、柱を立設した柱側ベースプレートをボルト上に載置し、通孔に合わせて柱側ベースプレートに穿設したアンカー穴と通孔に仮ボルトを挿通し、両ベースプレート間に挟み板を挟入して柱の位置決めを行った後、溝を切欠した挟みプレートで仮ボルトを挟み込み、仮ボルト抜き取り後に高力ボルトで両ベースプレートを締結してなるものである。 As a construction method for building foundations, there is JP-A-11-181790 (Patent No. 3095376). This construction method consists of cutting a steel pipe pile set in the ground to a desired length, fitting a pile head cap fitted with a bolt in the center to the pile tip, and using a pile-side pile base plate with a through hole. After the tip is sandwiched, it is welded to the tip of the pile, the column base plate with the column installed is placed on the bolt, and temporary bolts are inserted into the anchor holes and through holes drilled in the column side base plate to match the through holes. After positioning the pillar by inserting a sandwich plate between both base plates, a temporary bolt is sandwiched by a sandwich plate with a groove notched, and both base plates are fastened with high strength bolts after removing the temporary bolt. .

しかし、鋼管杭を地盤中に沈設する場合、芯ずれを起こすことなく所定位置に鋼管杭の中心を正確に沈設することは殆ど不可能であり、沈設された鋼管杭の中心軸と建屋構造物の柱の中心軸との間では数cm程の芯ずれが生じるが、前記特開平１１−１８１７９０の発明にあっては、この芯ずれについて対策が講じられていない。
また、鋼管杭の杭先端を正確に水平に切断するのは難しく、このため切断された杭先端に溶接される杭側ベースプレートも水平に取り付けるのが難しい。そこで、前記特開平１１−１８１７９０の発明にあっては、少し傾いている杭側ベースプレートに柱側ベースプレートを水平に取り付けるために、両ベースプレート間に薄い挟み板を適当数枚重ねて挟入して調整しているが、現場作業では１mm以下の傾きの微調整は困難と考えられる。その一方で、僅かな傾きであっても建屋構造物が高い場合には高い位置の水平方向のずれは大きく現れてその影響は無視できない。
さらにまた、前記特開平１１−１８１７９０の発明にあっては、鋼管杭側の補強として杭頭キャップを杭先端に嵌合しているが、鋼管杭の杭先端及びその下部側には建屋構造物の柱の連結によって大きな曲げモーメントが作用するので、鋼管杭の杭先端のみの補強では十分でなく、杭先端直近下部側となる杭先端側も同時に補強する必要があると考えられる。 However, when a steel pipe pile is set in the ground, it is almost impossible to accurately set the center of the steel pipe pile at a predetermined position without causing misalignment, and the central axis of the set steel pipe pile and the building structure There is a misalignment of about several centimeters between the center axis of the column and the invention disclosed in Japanese Patent Laid-Open No. 11-181790 does not take measures against this misalignment.
In addition, it is difficult to accurately cut the pile tip of the steel pipe pile horizontally, and therefore, it is difficult to horizontally attach the pile side base plate welded to the cut pile tip. Therefore, in the invention of the above-mentioned JP-A-11-181790, in order to horizontally attach the column side base plate to the slightly inclined pile side base plate, an appropriate number of thin sandwich plates are sandwiched between the base plates. Although it is adjusted, it is considered difficult to finely adjust the tilt of 1 mm or less in the field work. On the other hand, even if it is a slight inclination, if the building structure is high, the horizontal shift at a high position appears greatly, and its influence cannot be ignored.
Furthermore, in the invention of JP-A-11-181790, a pile head cap is fitted to the pile tip as a reinforcement on the steel pipe pile side. Since a large bending moment acts by connecting the columns, it is not sufficient to reinforce only the pile tip of the steel pipe pile, and it is considered necessary to simultaneously reinforce the pile tip side, which is the nearest lower side of the pile tip.

そこで、本願の出願人は、沈設された鋼管杭の中心軸が芯ずれを起こしていても建屋構造物の柱の中心軸を設置予定位置で鋼管杭の杭先端に連結支持でき、しかも鋼管杭の杭先端の切断平面が水平面に対して傾いていても建屋構造物の柱を傾かせることなく鋼管杭の杭先端に連結支持でき、さらに建屋構造物の柱を連結支持する鋼管杭の杭先端側を溶接を用いて補強する建屋基礎の施工法及び建屋基礎の施工用ジョイント盤を発明し、これを特許出願（特開２００５−２００８７９）し、特許（特許第３６０９０８３号）を取得している。 Therefore, the applicant of the present application can connect and support the central axis of the pillar of the building structure to the tip of the steel pipe pile at the planned installation position even if the center axis of the submerged steel pipe pile is misaligned. Even if the cutting plane of the pile tip is inclined with respect to the horizontal plane, it can be connected and supported to the pile tip of the steel pipe pile without tilting the column of the building structure, and further, the pile tip of the steel pipe pile that supports and supports the column of the building structure Invented a building foundation construction method and a building foundation construction joint board that reinforces the side using welding, and applied for a patent (Japanese Patent Laid-Open No. 2005-200879) to obtain a patent (Japanese Patent No. 3609083). .

特開平１１−１８１７９０（特許第３０９５３７６号）JP-A-11-181790 (Japanese Patent No. 3095376) 特開２００５−２００８７９（特許第３６０９０８３号）JP 2005-200909 (Patent No. 3609083)

ところで、前記特開２００５−２００８７９の発明にあっては、図１４に図示するように、鋼管杭６の杭先端６１に施工用ジョイント盤８の支持筒８１の下端を突き合わせ溶接で一体化しているが、現場溶接であるので溶接の品質を一定に保つのが困難であると共に、特に突き合わせ溶接であるため、開先の取り方など一定の溶接品質が要求され、そのため、溶接部分のＸ線検査も要求される。特に、近時の構造物耐震偽装問題が発覚してからは検査も厳しくなり、施工期間が非常に長くなっている。
また、鋼管杭６の杭先端６１に施工用ジョイント盤８の支持筒８１の下端を突き合わせ溶接するためには、図１４に図示するように鋼管杭６の杭先端６１の周囲を地盤表面から１ｍ程度掘削して、溶接作業が行えるようにする必要がある。
このように、手間やコストが余分にかかるという課題があった。 By the way, in the invention of JP-A-2005-200909, as shown in FIG. 14, the lower end of the support cylinder 81 of the construction joint board 8 is integrated with the pile tip 61 of the steel pipe pile 6 by butt welding. However, it is difficult to keep the welding quality constant because it is on-site welding, and in particular, since it is butt welding, a certain welding quality such as how to make the groove is required. Is also required. In particular, inspection has become severe since the recent problem of seismic impersonation of structures has been discovered, and the construction period has become very long.
Further, in order to butt weld the lower end of the support cylinder 81 of the construction joint board 8 to the pile tip 61 of the steel pipe pile 6, as shown in FIG. 14, the periphery of the pile tip 61 of the steel pipe pile 6 is 1 m from the ground surface. It is necessary to excavate to the extent that welding can be performed.
As described above, there is a problem that it takes time and cost.

この発明は、上記のような課題に鑑み、その課題を解決すべく創案されたものであって、その目的とするところは、沈設された鋼管杭の中心軸が芯ずれを起こしていても建屋構造物の柱の中心軸を設置予定位置で鋼管杭の杭先端に連結支持でき、しかも鋼管杭の杭先端の切断平面が水平面に対して傾いていても建屋構造物の柱を傾かせることなく鋼管杭の杭先端に連結支持でき、さらに建屋構造物の柱を連結支持する鋼管杭の杭先端側を手間やコストが余分にかかる溶接を用いることなく補強することのできる建屋基礎の施工法及び建屋基礎の施工用ジョイント盤を提供することにある。 In view of the above-described problems, the present invention was created to solve the problems, and the object of the present invention is to build a steel pipe pile even if the center axis of the steel pipe pile is misaligned. The central axis of the structural pillar can be connected and supported to the pile tip of the steel pipe pile at the planned installation position, and even if the cutting plane of the pile tip of the steel pipe pile is inclined with respect to the horizontal plane, the column of the building structure is not inclined Construction method of building foundation that can be connected and supported at the pile tip of steel pipe pile, and can reinforce the pile tip side of steel pipe pile that connects and supports the pillar of building structure without using labor and costly welding It is to provide a joint board for construction of a building foundation.

以上の課題を達成するために、請求項１の発明は、地盤に沈設した鋼管杭を所望長さで切断し、鋼管杭の切断後の杭先端側に連通孔をあけ、注入されるモルタルが流出するのを防ぐ内部モルタル受板を杭先端側内部に挿入して取り付け、支持盤の支持外筒を支持板が上端に固定された上記支持外筒の内周側面の上端側に等間隔で放射状に複数取り付けられその上端面が該支持板の下面に当接して当該支持板を補強しその先端面が杭先端側の外周側面に当接することで当該杭先端側の外周側面を外側から補強し且つその下部側が斜め下向きの傾斜面に形成され下方に向かって拡開して支持外筒を杭先端側の外側に嵌合する場合の位置決めのガイドとして機能するガイド兼補強リブを利用して杭先端側の外周側に装着して、支持外筒の上端側に固定された支持盤の支持板を杭先端に当接して載置した後に、支持外筒の内周側と杭先端側の外周側との間に注入されるモルタルが流出するのを防ぐ外部モルタル受板を支持外筒の下端に取り付け、モルタルを杭先端側内部に注入して杭先端側内部及び支持外筒の内周側と杭先端側の外周側との間に充填し、硬化したモルタルで支持盤を杭先端側に固定し、モルタル硬化後に杭先端より広い上記支持板表面に、上面に複数のネジ棒が植設された調整連結板の上面中心の支承突起の上端が設置予定位置の建屋構造物の柱の中心軸に一致するように且つ調整連結板の各ネジ棒を建屋構造物の柱の下端に固着されたベース板に形成された各ネジ棒孔に一致するように上記調整連結板を移動調整しながら固定し、調整連結板の上面に植設された各ネジ棒に各下部締付金具をそれぞれ各下部締付金具の上面を結ぶ仮想平面が所定高さの水平面になるように微調整しながら螺合し、上記ベース板を下ろして該ベース板の各ネジ棒孔に各ネジ棒を挿通させ、上記ベース板の下面を各下部締付金具の上面に接した後に、各ネジ棒に上部締付金具を螺合して締め付けて、建屋構造物の各柱を各鋼管杭の杭先端に、上記支持盤及び調整連結板から構成される施工用ジョイント盤を介して連結支持させる手段よりなるものである。 In order to achieve the above-mentioned problems, the invention of claim 1 is a method in which a steel pipe pile set in the ground is cut at a desired length, a communication hole is formed on the pile tip side after cutting the steel pipe pile, and the injected mortar is Insert an internal mortar receiving plate to prevent it from flowing into the pile tip side, and attach the support outer cylinder of the support panel at equal intervals to the upper end side of the inner peripheral side surface of the support outer cylinder with the support plate fixed to the upper end. A plurality of radially mounted upper end surfaces abut on the lower surface of the support plate to reinforce the support plate, and the front end surface abuts on the outer peripheral side surface on the pile front end side to reinforce the outer peripheral side surface on the pile front end side from the outside In addition, a guide-and-reinforcing rib that functions as a positioning guide when the lower side is formed on an inclined surface that is inclined downward and expands downward and the supporting outer cylinder is fitted to the outside of the pile tip side is used. and mounted on the outer peripheral side of the pile tip side Te, solid at the upper end of the support outer tube After being placed in contact with the pile tip support plate of the support plate which is, outside mortar receiving the mortar to be injected is prevented from flowing between the outer side of the inner periphery side and the pile tip side of the support outer tube Attach the plate to the lower end of the support outer cylinder, inject the mortar into the inside of the pile tip side, fill the inside of the pile tip side and between the inner circumference side of the support outer cylinder and the outer circumference side of the pile tip side, The support plate is fixed to the pile tip side, and after the mortar is hardened, the upper end of the support projection at the center of the upper surface of the adjustment connecting plate with a plurality of screw rods planted on the upper surface is wider than the pile tip. The above adjustment is made so that it matches the central axis of the column of the building structure and the screw rods of the adjustment connecting plate match the screw rod holes formed in the base plate fixed to the lower end of the column of the building structure. Each screw rod fixed on the connecting plate while moving and adjusting, and planted on the upper surface of the adjusting connecting plate The lower clamps are screwed together with fine adjustment so that the virtual plane connecting the upper surfaces of the lower clamps becomes a horizontal plane of a predetermined height, and the base plate is lowered to open each screw rod hole of the base plate Each screw rod is inserted through and the lower surface of the base plate is brought into contact with the upper surface of each lower clamp, and then the upper clamp is screwed into each screw rod and tightened. It comprises means for connecting and supporting the pile tip of the steel pipe pile via the joint plate for construction composed of the support plate and the adjustment connecting plate.

また、以上の課題を達成するために、請求項２の発明は、請求項１の建屋基礎の施工法において使用され、沈設された鋼管杭の切断後の杭先端と建屋構造物の柱の下端に固着されたベース板との間に取り付けられ鋼管杭の杭先端に建屋構造物の柱の下端を連結支持させる建屋基礎の施工用ジョイント盤であって、鋼管杭の杭先端側の外周側に装着され注入硬化後のモルタルで固定される支持外筒と、支持外筒の外周側面に取り付けられ上方に向かって外方に拡張する複数の外部補強板と、支持外筒の上端に固定され外部補強板で補強支持され支持外筒より広く且つ施工時に鋼管杭の切断後の杭先端に当接して載置されモルタル注入孔を有し該モルタル注入孔の周囲の杭先端側の外周側と支持外筒の内周側との間に位置するように複数の空気排出孔が形成され該杭先端より広い平面板状の支持板と、この支持板が上端に固定された上記支持外筒の内周側面の上端側に等間隔で放射状に複数取り付けられその上端面が該支持板の下面に当接して当該支持板を補強しその先端面が杭先端側の外周側面に当接することで当該杭先端側の外周側面を外側から補強し且つその下部側が斜め下向きの傾斜面に形成され下方に向かって拡開して支持外筒を杭先端側の外側に嵌合する場合の位置決めのガイドとして機能するガイド兼補強リブと、杭先端側内部に挿入されて取り付けられ鋼管杭の杭先端側内部に注入されるモルタルが杭内部を落下して流出するのを防ぐ内部モルタル受板と、支持外筒の下端に取り付けられ支持外筒の内周側と杭先端側の外周側との間に注入されるモルタルが流出するのを防ぐ外部モルタル受板と、を備えた支持盤と、
施工時に上記ベース板の下面を上面で接して支持し高さ方向微調整可能な下部締付金具と該下部締付金具と協動して上記ベース板の上面を挟圧する上部締付金具とが螺合されるネジ棒が上記ベース板に形成されたネジ棒孔位置に対応してその上面に複数植設され上面中心に上端が丸みを帯びた高さ調節自在な支承突起を備え施工時に上記ベース板の設置予定位置に合わせて上記支持盤の支持板の表面上で移動調整されて固定される調整連結板と、から少なくとも構成した手段よりなるものである。 Moreover, in order to achieve the above-mentioned subject, invention of Claim 2 is used in the construction method of the building foundation of Claim 1, and the lower end of the pillar tip of the building structure pillar after the cut of the steel pipe pile which was laid down It is a joint board for the construction of a building foundation that is attached between the base plate fixed to the steel plate and supports the lower end of the pillar of the building structure on the pile tip of the steel pipe pile, on the outer peripheral side of the pile tip side of the steel pipe pile A support outer cylinder that is mounted and fixed with mortar after injection hardening, a plurality of external reinforcing plates that are attached to the outer peripheral side surface of the support outer cylinder and expand outward, and fixed to the upper end of the support outer cylinder and the outer periphery side of the periphery of the pile tip side of the reinforcing plate reinforced supported have placed on the mortar injection hole to pile tip after cutting wide rather and steel pipe piles during construction than the support outer tube in contact with the mortar injection hole Multiple air exhausts so that they are positioned between the inner periphery of the support outer cylinder A flat plate-like support plate wider than該杭front end hole is formed at its upper end face a plurality mounted radially at equal intervals on the upper side of the inner peripheral surface of the support outer tube that the support plate is fixed to the upper end Reinforce the support plate by abutting against the lower surface of the support plate, and the front end surface abuts the outer peripheral side surface of the pile front end side to reinforce the outer peripheral side surface of the pile front end side, and the lower side thereof is inclined obliquely downward A guide-and-reinforcement rib that functions as a positioning guide when the support outer cylinder is fitted to the outside of the pile tip side by expanding downward and forming a support outer cylinder, and a steel pipe inserted and attached inside the pile tip side An internal mortar backing plate that prevents the mortar injected into the pile tip side from falling and flowing out of the inside of the pile, and the outer circumference of the inner side of the support outer cylinder and the outer side of the pile attached to the lower end of the support outer cylinder The mortar injected between the sides flows out And a support plate which is provided with an external mortar receiving plate, the to prevent,
A lower fastening bracket that supports the lower surface of the base plate in contact with the upper surface at the time of construction and can be finely adjusted in the height direction, and an upper fastening bracket that cooperates with the lower fastening bracket to clamp the upper surface of the base plate. A plurality of screw rods to be screwed corresponding to the positions of the screw rod holes formed on the base plate are provided on the upper surface thereof, and provided with a height-adjustable support projection having a rounded upper end at the center of the upper surface at the time of construction. It comprises at least means comprising an adjustment connecting plate which is moved and adjusted on the surface of the support plate of the support plate in accordance with the planned installation position of the base plate.

課題を解決するための手段よりなるこの発明に係る建屋基礎の施工法及び建屋基礎の施工用ジョイント盤によれば、Ｘ線検査などが要求される突き合わせ溶接に代えて検査が不要なモルタルを使用して施工用ジョイント盤を杭先端に固定することができるため、厳しい検査を受けることもなく、施工期間が検査で長期化するのを防ぐことができる。しかも、鋼管杭の杭先端に施工用ジョイント盤の下端を溶接する必要がないので、溶接のために地盤中に沈設された鋼管杭の杭先端側の周囲の土砂を取り除く必要がなく、このため掘削作業を不要にでき、その分作業効率を高めることができる。このように、手間やコストが余分にかかるのを防ぐことができる。
鋼管杭の杭先端側には大きな曲げモーメントが作用するので、これに対処するために鋼管杭の杭先端側の例えば３ｍ程の長さは鋼管杭の板厚を厚くしている場合が多いが、この発明では鋼管杭の杭先端側の中空部分及びその外周側に、モルタルの注入をしていて、中空部分から内部が詰まった中実部分に代えると共にその外周側もモルタルによって補強されているので、これにより曲げ剛性が高められ、その結果、鋼管杭の板厚を逆に薄くすることができ、鋼管杭の材料費を少し安くすることができる等、極めて新規的有益なる効果を奏するものである。 According to the building foundation construction method and the building foundation construction joint machine according to the present invention comprising means for solving the problems, mortar that does not require inspection is used instead of butt welding, which requires X-ray inspection, etc. Since the construction joint board can be fixed to the tip of the pile, the construction period can be prevented from being prolonged by the inspection without being subjected to a strict inspection. Moreover, since it is not necessary to weld the lower end of the joint plate for construction to the pile tip of the steel pipe pile, it is not necessary to remove the earth and sand around the pile tip side of the steel pipe pile set in the ground for welding. Excavation work can be dispensed with and work efficiency can be increased accordingly. In this way, it is possible to prevent an extra effort and cost.
Since a large bending moment acts on the pile tip side of the steel pipe pile, in order to cope with this, for example, the length of about 3 m on the pile tip side of the steel pipe pile often increases the thickness of the steel pipe pile. In this invention, the mortar is injected into the hollow portion on the pile tip side of the steel pipe pile and the outer peripheral side thereof, and the outer peripheral side is reinforced with the mortar while replacing the hollow portion with the solid portion clogged inside. As a result, the bending rigidity is increased, and as a result, the thickness of the steel pipe pile can be reduced on the contrary, and the material cost of the steel pipe pile can be reduced a little. It is.

この発明を実施するための形態を示す建屋構造物の柱の下端と鋼管杭の杭先端との間に取り付けられた施工用ジョイント盤の斜視図である。It is a perspective view of the construction joint board attached between the lower end of the pillar of the building structure which shows the form for implementing this invention, and the pile front-end | tip of a steel pipe pile. （Ａ）はこの発明を実施するための形態を示すベース板と調整連結板との分解斜視図である。（Ｂ）はこの発明を実施するための形態を示す調整連結板の側面図である。(A) is an exploded perspective view of a base plate and an adjustment connecting plate showing an embodiment for carrying out the present invention. (B) is a side view of an adjustment connecting plate showing an embodiment for carrying out the present invention. （Ａ）はこの発明を実施するための形態を示す施工用ジョイント盤の支持盤の側断面図、（Ｂ）は同図（Ａ）の平面図である。(A) is a sectional side view of the support disk of the joint disk for construction which shows the form for implementing this invention, (B) is a top view of the figure (A). （Ａ）はこの発明を実施するための形態を示す施工用ジョイント盤が取れ付けられる前の杭先端側の側断面図、（Ｂ）はこの発明を実施するための形態を示す施工用ジョイント盤が取れ付けられた後の側断面図である。(A) is a side sectional view of the pile tip side before the construction joint board showing the form for carrying out the present invention is attached, (B) is the construction joint board showing the form for carrying out the present invention. It is a sectional side view after having been attached. この発明を実施するための形態を示す調整連結板が取り付けられるまでの標準的な鋼管杭の概略施工手順図である。It is a schematic construction procedure figure of a standard steel pipe pile until the adjustment connection board which shows the form for implementing this invention is attached. この発明を実施するための形態を示す標準的な施工状態の側面図である。It is a side view of the standard construction state which shows the form for implementing this invention. この発明を実施するための形態を示す芯ずれを起こしている場合の施工状態の側面図である。It is a side view of the construction state in the case of causing misalignment showing a form for carrying out the present invention. この発明を実施するための形態を示す鋼管杭の杭先端の切断面が傾いている場合の施工状態の側面図である。It is a side view of the construction state in case the cut surface of the pile tip of the steel pipe pile which shows the form for implementing this invention inclines. この発明を実施するための形態を示す建屋構造物の柱の下端と鋼管杭の杭先端との間に取り付けられた他例の施工用ジョイント盤の斜視図である。It is a perspective view of the construction joint board of the other example attached between the lower end of the pillar of the building structure which shows the form for implementing this invention, and the pile front-end | tip of a steel pipe pile. （Ａ）はこの発明を実施するための形態を示す他例のベース板と調整連結板との分解斜視図である。（Ｂ）はこの発明を実施するための形態を示す他例の調整連結板の側面図である。(A) is an exploded perspective view of a base plate and an adjustment connecting plate of another example showing an embodiment for carrying out the present invention. (B) is a side view of an adjustment connecting plate of another example showing a form for carrying out the present invention. この発明を実施するための形態を示す標準的な他例の施工状態の側面図である。It is a side view of the construction state of the other standard example which shows the form for implementing this invention. この発明を実施するための形態を示す芯ずれを起こしている場合の他例の施工状態の側面図である。It is a side view of the construction state of the other example in the case of having caused the misalignment which shows the form for implementing this invention. この発明を実施するための形態を示す鋼管杭の杭先端の切断面が傾いている場合の他例の施工状態の側面図である。It is a side view of the construction state of the other example when the cut surface of the pile tip of the steel pipe pile which shows the form for implementing this invention inclines. 従来説明図である。It is conventional explanatory drawing.

以下、図面に記載の発明を実施するための形態に基づいて、この発明をより具体的に説明する。
図において、建屋基礎の施工法において使用される施工用ジョイント盤１は、沈設された鋼管杭６の切断後の杭先端６１と建屋構造物の柱７の下端との間に取り付けられて鋼管杭６の杭先端６１に建屋構造物の柱７の下端を連結支持させる部材で、支持盤２と調整連結板３から主に構成される。 Hereinafter, the present invention will be described more specifically based on embodiments for carrying out the invention described in the drawings.
In the figure, the construction joint board 1 used in the construction method of the building foundation is installed between the pile tip 61 after the cut steel pipe pile 6 and the lower end of the column 7 of the building structure. 6 is a member that connects and supports the lower end of the pillar 7 of the building structure to the pile front end 61 of the building 6, and is mainly composed of the support board 2 and the adjustment connecting plate 3.

施工用ジョイント盤１を構成する支持盤２は、鋼管杭６の杭先端側内部６２及び杭先端側６３の外周側に注入され硬化後に鋼管杭６の杭先端直近下部側となる杭先端側６３を内外から補強するモルタル２１と、鋼管杭６の杭先端側６３の外周側に装着され硬化後のモルタル２１で固定される支持外筒２２と、支持外筒２２の外周側に取り付けられ上方に向かって拡張する外部補強板２３と、支持外筒２２の上端に固定され外部補強板２３で補強支持され鋼管杭６の杭先端６１に載置される平面板状の支持板２４と、杭先端側内部６２に注入された硬化前のモルタル２１が鋼管杭６の内部を落下して流出するのを防ぐ内部モルタル受板２５と、支持外筒２２の内周側と杭先端側６３の外周側との間に注入された硬化前のモルタル２１が落下して流出するのを防ぐ外部モルタル受板２６とを少なくとも備えている。 The support plate 2 constituting the construction joint plate 1 is injected into the pile tip side inside 62 of the steel pipe pile 6 and the outer periphery side of the pile tip side 63, and after hardening, the pile tip side 63 which becomes the side immediately below the pile tip of the steel pipe pile 6 is hardened. A mortar 21 that reinforces the steel pipe pile 6 from the inside and outside, a support outer cylinder 22 that is attached to the outer peripheral side of the pile tip side 63 of the steel pipe pile 6 and fixed by the mortar 21 after hardening, and is attached to the outer peripheral side of the support outer cylinder 22 upward. An external reinforcing plate 23 that expands toward the top, a flat plate-like supporting plate 24 that is fixed to the upper end of the support outer cylinder 22, is reinforced and supported by the external reinforcing plate 23, and is placed on the pile tip 61 of the steel pipe pile 6; An internal mortar receiving plate 25 that prevents the uncured mortar 21 injected into the side internal 62 from falling and flowing out of the steel pipe pile 6, the inner peripheral side of the support outer cylinder 22, and the outer peripheral side of the pile front end side 63 The mortar 21 before curing injected between And it includes at least an external mortar receiving plate 26 to prevent the output.

施工用ジョイント盤１を構成する調整連結板３は、施工時に柱７の下端の設置予定位置に合わせて支持板２４の表面上で移動調整されて溶着され下部締付金具３２及び上部締付金具３３が螺合されるネジ棒３１が上面に植設され上面中心に支承突起３４が設けられたものから少なくとも構成される。 The adjustment connecting plate 3 constituting the construction joint board 1 is moved and adjusted on the surface of the support plate 24 in accordance with the planned installation position of the lower end of the column 7 at the time of construction, and is welded to the lower fastening bracket 32 and the upper fastening bracket. The screw rod 31 to which the screw 33 is screwed is planted on the upper surface, and at least the support rod 34 is provided at the center of the upper surface.

施工用ジョイント盤１を構成する支持盤２は、支持外筒２２が沈設された鋼管杭６の切断後の杭先端６１の杭先端側内部６２及び杭先端側６３の外周側に注入されて硬化したモルタル２１によって杭先端６１に固定される。沈設された鋼管杭６の切断後の杭先端側内部６２及び杭先端側６３の外周側に注入されるモルタル２１には例えば無収縮のモルタルが使用される。 The support board 2 constituting the construction joint board 1 is injected into the pile tip side inside 62 of the pile tip 61 and the outer periphery side of the pile tip side 63 after the cutting of the steel pipe pile 6 in which the support outer cylinder 22 is set and hardened. The mortar 21 is fixed to the pile tip 61. For example, a non-shrinkable mortar is used for the mortar 21 injected into the pile tip side inside 62 and the pile tip side 63 outer periphery side after the cut steel pipe pile 6 is cut.

その後、鋼管杭６の杭先端６１に固定された支持盤２の支持板２４に、建屋構造物の柱７の下端のベース板７１が連結固定される調整連結板３が、後述の隅肉溶接ａ（図１、図６〜図８参照）又はボルト３５（図９〜図１３参照）によって固定される。支持盤２は建屋構造物の柱７の下端のベース板７１と鋼管杭６の杭先端６１との間に位置して、建屋構造物の全荷重を支えて鋼管杭６の杭先端側６３に逃がす役目を果たす。 Thereafter, the adjustment connecting plate 3 in which the base plate 71 at the lower end of the column 7 of the building structure is connected and fixed to the support plate 24 of the support plate 2 fixed to the pile tip 61 of the steel pipe pile 6 is a fillet weld described later. It is fixed by a (see FIGS. 1 and 6 to 8) or a bolt 35 (see FIGS. 9 to 13). The support board 2 is located between the base plate 71 at the lower end of the column 7 of the building structure and the pile tip 61 of the steel pipe pile 6 and supports the entire load of the building structure on the pile tip side 63 of the steel pipe pile 6. Play the role of escape.

支持外筒２２は、鋼管杭６の切断された杭先端６１の外周側に装着される。支持外筒２２の内径は杭先端側６３の外径よりも十分に大きく、内径と外径との間にモルタル２１が十分に充填できる隙間を有している。支持外筒２２は鋼製の円筒板から形成されている。支持外筒２２は、杭先端側６３の外周側で硬化したモルタル２１と連通孔を通じて杭先端側内部６２と硬化したモルタル２１とによって、杭先端側６３に固定される。支持筒２２は建屋構造物の柱７を通じて作用する荷重を支えてその荷重を鋼管杭６の杭先端側６３に直接伝達する機能を果たす。 The support outer cylinder 22 is attached to the outer peripheral side of the cut-off tip 61 of the steel pipe pile 6. The inner diameter of the support outer cylinder 22 is sufficiently larger than the outer diameter of the pile tip side 63, and there is a gap in which the mortar 21 can be sufficiently filled between the inner diameter and the outer diameter. The support outer cylinder 22 is formed from a steel cylindrical plate. The support outer cylinder 22 is fixed to the pile tip side 63 by the mortar 21 hardened on the outer peripheral side of the pile tip side 63 and the pile tip side inside 62 and the hardened mortar 21 through the communication hole. The support cylinder 22 functions to support a load acting through the column 7 of the building structure and directly transmit the load to the pile tip side 63 of the steel pipe pile 6.

支持外筒２２の外周側面には支持外筒２２の中心から周囲に向けて放射状に配置された鋼製の外部補強板２３が配置されている。各外部補強板２３はその垂直な一側端が支持外筒２２の外周側面に溶着されて固設されている。各外部補強板２３は支持外筒２２の外周側面からの張り出し長さが上方に向かって拡張して逆角錐型の形状になっている。各外部補強板２３は外側から支持板２４を補強してその剛性を高めている。 On the outer peripheral side surface of the support outer cylinder 22, steel external reinforcing plates 23 are arranged radially from the center of the support outer cylinder 22 toward the periphery. Each external reinforcing plate 23 is fixed by welding one vertical end thereof to the outer peripheral side surface of the support outer cylinder 22. Each of the external reinforcing plates 23 has an inverted pyramid shape in which the protruding length from the outer peripheral side surface of the supporting outer cylinder 22 extends upward. Each external reinforcing plate 23 reinforces the support plate 24 from the outside to increase its rigidity.

図では例えば外部補強板２３は支持外筒２２の中心から円周方向に４５度の等角度で八方向の放射状に配置されているが、各外部補強板２３は外方側への張り出し長さが一つおきに交互に長短になっている。即ち、張り出し長さの長い外部補強板２３は９０度の等角度で十字状に配置され、この十字状の配置の中間に張り出し長さが短い外部補強板２３が４５度の角度ずれた状態で十字状に配置されている。 In the figure, for example, the external reinforcing plates 23 are radially arranged in eight directions at an equal angle of 45 degrees in the circumferential direction from the center of the support outer cylinder 22, but each external reinforcing plate 23 has a protruding length outward. Are alternately shorter and longer. That is, the external reinforcement plate 23 having a long overhang length is arranged in a cross shape at an equal angle of 90 degrees, and the external reinforcement plate 23 having a short overhang length is shifted by 45 degrees in the middle of the cross-shaped arrangement. It is arranged in a cross shape.

張り出し長さが長短の各外部補強板２３は、その下端側の長さは皆同一であるが、上方に向かって張り出し長さが異なる。即ち、張り出し長さが長い方の外部補強板２３は上方に向かって張り出し長さが長く、張り出し長さが短い方の外部補強板２３は上方に向かって張り出し長さが短い。各外部補強板２３の張り出し側の側端は上方に向かって斜め前方に直線状に傾斜している。 Each of the external reinforcing plates 23 having a long overhang length has the same length on the lower end side, but the overhang lengths differ upward. That is, the external reinforcement plate 23 having a longer overhang length has a longer overhang length, and the external reinforcement plate 23 having a shorter overhang length has a shorter overhang length. The side end of each external reinforcing plate 23 on the projecting side is inclined linearly forward and obliquely upward.

支持外筒２２及び各外部補強板２３の上側には平面板状の支持板２４が溶着されて固設されている。支持盤２は、平面板状の支持板２４が沈設された鋼管杭６の切断後の杭先端６１に載置されてモルタル２１の硬化によって固定される。鋼管杭６の杭先端６１に載置される平板状の支持板２４は、その後に注入されるモルタル２１によって、鋼管杭６の杭先端６１に固定される。支持板２４はその中央側が鋼管杭６の杭先端６１を塞ぐように載置されて取り付けられている。 A flat plate-like support plate 24 is welded and fixed to the upper side of the support outer cylinder 22 and each external reinforcing plate 23. The support plate 2 is placed on the pile tip 61 after cutting the steel pipe pile 6 on which the flat plate-like support plate 24 is set, and is fixed by hardening the mortar 21. The flat support plate 24 placed on the pile tip 61 of the steel pipe pile 6 is fixed to the pile tip 61 of the steel pipe pile 6 by the mortar 21 injected thereafter. The support plate 24 is placed and attached so that the center side closes the pile tip 61 of the steel pipe pile 6.

支持板２４は平面から見て例えば正方形の形状をしており、支持板２４の下面の正方形の対角線位置に張り出し長さが長い方の十字状に配置された外部補強板２３の上端が溶着されている。また、支持板２４の下面の正方形の相対向する二辺の中点同士を結ぶ十字線位置に張り出し長さが短い方の十字状に配置された外部補強板２３の上端が溶着されている。 The support plate 24 has, for example, a square shape when seen from the plane, and the upper end of the external reinforcing plate 23 arranged in a cross shape with a longer overhang is welded to the square diagonal position on the lower surface of the support plate 24. ing. Further, the upper end of the external reinforcing plate 23 is welded to the position of the cross line connecting the midpoints of two opposite sides of the square on the lower surface of the support plate 24 and arranged in a cross shape with a shorter overhanging length.

支持盤２の上部に位置する例えば正方形の形状を有する支持板２４の一辺の長さは、支持板２４の下部に位置する円形の支持外筒２２の直径の数倍あり、支持盤２は上方に向けて拡張する逆角錐型の形状になっている。下部の支持外筒２２に比べて上部の支持板２４を広くするのは、建屋構造物の製作誤差及び施工誤差による沈設された鋼管杭６の中心軸ｈの芯ずれに対応できるようにするためである。 The length of one side of the support plate 24 having a square shape, for example, located at the upper portion of the support plate 2 is several times the diameter of the circular support outer cylinder 22 located at the lower portion of the support plate 24. It has an inverted pyramid shape that expands toward. The reason why the upper support plate 24 is made wider than the lower support outer cylinder 22 is to cope with the misalignment of the center axis h of the steel pipe pile 6 that has been laid due to manufacturing errors and construction errors of the building structure. It is.

即ち、製作誤差及び施工誤差によって、建屋構造物の柱７の中心軸ｋと鋼管杭６の杭先端６１の中心軸ｈとは一致せず、建屋構造物の柱７の中心軸ｋは鋼管杭６の杭先端６１の中心軸ｈの位置から３６０度の全方向の何れかの方向にずれることになるが、この全方向の何れかの方向のずれに対応できるように、下部の支持外筒２２に比べて上部の支持板２４を広くしているのである。 That is, due to manufacturing errors and construction errors, the central axis k of the column 7 of the building structure does not coincide with the central axis h of the pile tip 61 of the steel pipe pile 6, and the central axis k of the column 7 of the building structure is the steel pipe pile. 6 from the position of the central axis h of the pile tip 61 of the stake 6 in any direction in all directions of 360 degrees, so that the lower support outer cylinder can cope with the deviation in any direction in all directions. The upper support plate 24 is wider than the upper support plate 24.

支持板２４の中央側つまり鋼管杭６の杭先端側内部６２に位置する箇所には、モルタル２１を注入するためのモルタル注入孔２４ａが形成されている。このモルタル注入孔２４ａの周囲には複数の空気排出孔２４ｂが円周方向に等間隔で形成されている。空気排出孔２４ｂは杭先端側６３の外周側と支持外筒２２の内周側との間に位置するように形成されている。空気排出孔２４ｂは、モルタル注入孔２４ａからのモルタル２１の注入時に、鋼管杭６の杭先端側内部６２から杭先端側６３の側面に形成された連通孔６３ａを通って杭先端側６３の外周側と支持外筒２２の内周側との間に押し出された空気の排出孔として使用される。 A mortar injection hole 24 a for injecting the mortar 21 is formed at a position located in the center side of the support plate 24, that is, in the pile tip side inside 62 of the steel pipe pile 6. Around the mortar injection hole 24a, a plurality of air discharge holes 24b are formed at equal intervals in the circumferential direction. The air discharge hole 24 b is formed so as to be located between the outer peripheral side of the pile front end side 63 and the inner peripheral side of the support outer cylinder 22. When the mortar 21 is injected from the mortar injection hole 24a, the air discharge hole 24b passes through the communication hole 63a formed on the side surface of the pile tip side 63 from the pile tip side inside 62 of the steel pipe pile 6 to the outer periphery of the pile tip side 63. It is used as a discharge hole for air pushed out between the side and the inner peripheral side of the support outer cylinder 22.

支持外筒２２の内周側面の上端側には等間隔で放射状に複数のガイド兼補強リブ２２ａが取り付けられている。ガイド兼補強リブ２２ａは隅肉溶接で固着して配置されている。叉支持外筒２２の内周側面の下部側には滑り止め２２ｂが取り付けられている。この滑り止め２２ｂは内周側面の全周又は一部に隅肉溶接で固着されている。ガイド兼補強リブ２２ａは上端面が水平に形成され、水平な上端面は支持板２４の下面に当接する位置に取り付けられていて、モルタル注入孔２４ａ及び空気排出孔２４ｂによって支持板２４の強度が低下するのを補強する。 A plurality of guide / reinforcing ribs 22a are attached to the upper end side of the inner peripheral side surface of the support outer cylinder 22 radially at equal intervals. The guide / reinforcing rib 22a is fixedly disposed by fillet welding. A slip stopper 22 b is attached to the lower side of the inner peripheral side surface of the fork support outer cylinder 22. This anti-slip 22b is fixed to the entire circumference or part of the inner circumferential side surface by fillet welding. The guide / reinforcing rib 22a is formed such that the upper end surface is formed horizontally, and the horizontal upper end surface is attached to a position where it abuts the lower surface of the support plate 24. The strength of the support plate 24 is increased by the mortar injection hole 24a and the air discharge hole 24b. Reinforces the decline.

また、ガイド兼補強リブ２２ａは先端面が上下に垂直に形成され、下部側は斜め下向きの傾斜面に形成され下方に向かって拡開していることにより、支持外筒２２を杭先端側６３の外側に嵌合する場合の位置決めのガイドとして機能しスムースな取り付けを可能にし、又上下垂直な先端面が取り付け時のずれ止め機能を果たす。さらに、ガイド兼補強リブ２２ａの基端が支持外筒２２の内周側面に溶接されて固定され、先端の上下垂直面が杭先端側６３の外周側面に当接することで杭先端側６３を外側から補強する。 Further, the guide / reinforcing rib 22a is formed such that the front end surface is vertically formed vertically, and the lower side is formed in an inclined surface inclined downward, and is expanded downward, so that the support outer cylinder 22 is connected to the pile front end side 63. It functions as a positioning guide when fitted on the outside, enabling smooth attachment, and the top and bottom vertical end surfaces serve to prevent slippage during attachment. Further, the base end of the guide / reinforcing rib 22 a is welded and fixed to the inner peripheral side surface of the support outer cylinder 22, and the vertical end surface of the tip abuts on the outer peripheral side surface of the pile front end side 63, thereby Reinforce from.

杭先端側６３の側周面には複数の連通孔６３ａが形成されている。連通孔６３ａは現場で例えばガス切断で孔があけられる。連通孔６３ａは、注入されたモルタル２１を杭先端側６３の内外によく行き渡せると共に、モルタル２１と杭先端側６３との付着を高める役目を果たす。さらに、連通孔６３ａは、内部モルタル受板２５を取り付ける場合に利用される。 A plurality of communication holes 63 a are formed on the side peripheral surface of the pile front end side 63. The communication hole 63a is drilled at the site by, for example, gas cutting. The communication hole 63 a serves to increase the adhesion between the mortar 21 and the pile front end side 63 while allowing the injected mortar 21 to be well distributed inside and outside the pile front end side 63. Furthermore, the communication hole 63a is used when the internal mortar receiving plate 25 is attached.

内部モルタル受板２５は、鋼管杭６の杭先端側内部６２に注入されたモルタル２１が特に硬化する前の流動性を有する場合に、杭内部を落下して流出するのを防いで杭先端側内部６２に留まらせる役目を果たす。内部モルタル受板２５は、杭先端側６３の相対向する両側に形成された連通孔６３ａに上端側のフック部分がそれぞれ引っ掛けられた例えば棒状又はワイヤーの吊り具２５ａの下端側に連結されて吊持されている。 When the mortar 21 injected into the pile tip side inside 62 of the steel pipe pile 6 has fluidity before being hardened, the internal mortar receiving plate 25 prevents the inside of the pile from falling and flowing out to prevent the pile tip side. Plays the role of staying inside 62. The internal mortar receiving plate 25 is suspended by being connected to the lower end side of, for example, a rod-shaped or wire hanging tool 25a in which hook portions on the upper end side are hooked in communication holes 63a formed on opposite sides of the pile front end side 63, respectively. Is held.

内部モルタル受板２５は、円形の鋼管杭６の杭先端側内部６２の内径と略同一の例えば円形の形状をしており、また杭先端側内部６２に挿入する際に内周側面に図示しない滑り止めが固着されて突起している場合、この突起する滑り止めを通過できる程度の弾性変形するプラスチック製が使用される。 The internal mortar receiving plate 25 has, for example, a circular shape which is substantially the same as the inner diameter of the pile tip side inside 62 of the circular steel pipe pile 6 and is not shown on the inner peripheral side when inserted into the pile tip side inside 62. When the non-slip is fixed and protrudes, a plastic that is elastically deformed to such an extent that it can pass through the protruding anti-slip is used.

外部モルタル受板２６は、鋼管杭６の杭先端側６３の外周側面に注入されたモルタル２１が特に硬化する前の流動性を有する場合に、外周側面を落下して流出するのを防いで杭先端側６３の外周側面に留まらせる役目を果たす。 The external mortar receiving plate 26 is a pile that prevents the outer peripheral side from falling and flowing out when the mortar 21 injected into the outer peripheral side of the pile tip side 63 of the steel pipe pile 6 has fluidity before being particularly hardened. It plays a role of staying on the outer peripheral side surface of the distal end side 63.

外部モルタル受板２６は例えば２個の半円形リング板から構成されていて、これを両側から杭先端側６３の外周側面に密着させた状態で、支持外筒２２の下端周縁に溶接で仮付けして固設される。外部モルタル受板２６に作用するモルタル２１は支持外筒２２と杭先端側６３の外周との隙間に充填される量であり、その重量は余りないので仮付け溶接で十分であり、溶接に手間取ることはない。 The external mortar receiving plate 26 is composed of, for example, two semicircular ring plates, and is temporarily attached to the peripheral edge of the lower end of the supporting outer cylinder 22 by welding in close contact with the outer peripheral side surface of the pile front end side 63 from both sides. And fixed. The mortar 21 acting on the external mortar receiving plate 26 is an amount filled in the gap between the support outer cylinder 22 and the outer periphery of the pile front end side 63, and its weight is not so much that it is sufficient for tack welding, which takes time for welding. There is nothing.

鋼管杭６の切断後の杭先端側６３の外周側面には、必要に応じて滑り止め６３ｂがその全周又は一部に隅肉溶接によって固着される。滑り止め６３ｂは、硬化後の支持外筒２２の内周側と杭先端側６３の外周側との間に充填されたモルタル２１の内周側面と凹凸状に密着して、杭先端側６３の外周側面とモルタル２１の内周側面との滑り抵抗を高めて、支持外筒２２と鋼管杭６の杭先端側６３との曲げ剛性を高める。また硬化後のモルタル２１が滑り落下するのを防ぐ。滑り止めは施工用ジョイント盤１が杭先端６１に取り付けられる前に行われる。 On the outer peripheral side surface of the pile tip side 63 after cutting the steel pipe pile 6, an anti-slip 63b is fixed to the entire periphery or a part thereof by fillet welding as necessary. The anti-slip 63b is in close contact with the inner peripheral side surface of the mortar 21 filled between the inner peripheral side of the support outer cylinder 22 after being cured and the outer peripheral side of the pile front end side 63, so The sliding resistance between the outer peripheral side surface and the inner peripheral side surface of the mortar 21 is increased, and the bending rigidity between the support outer cylinder 22 and the pile tip side 63 of the steel pipe pile 6 is increased. In addition, the cured mortar 21 is prevented from sliding down. Anti-slip is performed before the construction joint board 1 is attached to the pile tip 61.

調整連結板３は、水平方向のずれ及び傾きを調整して建屋構造物の柱７を支持盤２に連結固定させる役目を果たすもので、建屋構造物の柱７の中心軸ｋの位置に該調整連結板３の上面中心３ａの位置を移動調整して一致させた後に、現場において支持盤２の上部の支持板２４の表面に後述の隅肉溶接ａ（図１、図６〜図８参照）又はボルト３５（図９〜図１３参照）により固定される。 The adjustment connecting plate 3 plays a role of connecting and fixing the column 7 of the building structure to the support board 2 by adjusting the horizontal shift and inclination, and is located at the position of the central axis k of the column 7 of the building structure. After the position of the upper surface center 3a of the adjustment connecting plate 3 is moved and adjusted to coincide with each other, the fillet weld a (see FIGS. 1 and 6 to 8) described later is applied to the surface of the support plate 24 above the support plate 2 at the site. ) Or bolts 35 (see FIGS. 9 to 13).

調整連結板３は建屋構造物の柱７の下端に固着されたベース板７１と同形状の鋼製の平面板状の形状からなり、その上面にはベース板７１に形成された複数のネジ棒孔７２の位置に対応する箇所に複数のネジ棒３１が上向きに垂直に植設されている。ネジ棒３１は例えば調整連結板３の上面に下向きに穿設されたネジ孔にその根元側が螺入されて植設されているが、溶接によって植設されることもある。 The adjustment connecting plate 3 has a flat plate shape made of steel having the same shape as the base plate 71 fixed to the lower end of the column 7 of the building structure, and a plurality of screw rods formed on the base plate 71 on the upper surface thereof. A plurality of screw rods 31 are vertically planted at locations corresponding to the positions of the holes 72. For example, the screw rod 31 is planted by screwing the root side into a screw hole drilled downward on the upper surface of the adjustment connecting plate 3, but may be planted by welding.

各ネジ棒３１の側周面には螺旋状にネジ山が形成されている。建屋構造物の柱７の下端のベース板７１に形成されるネジ棒孔７２は、一般に中央の柱７部分の周辺側に等間隔で形成されており、このため、ネジ棒３１も調整連結板３の表面の中央の周辺側に等間隔で植設されている。ネジ棒３１には例えば高張力ボルトが使用される。 A screw thread is spirally formed on the side peripheral surface of each screw rod 31. The screw rod holes 72 formed in the base plate 71 at the lower end of the column 7 of the building structure are generally formed at equal intervals on the peripheral side of the central column 7 portion. For this reason, the screw rod 31 is also an adjustment connecting plate. 3 are planted at equal intervals on the peripheral side of the center of the surface. For example, a high tension bolt is used for the screw rod 31.

調整連結板３の表面に植設された各ネジ棒３１には、嵌合されるベース板７１を挟んでその下側と上側に下部締付金具３２と上部締付金具３３とが螺合される。下部締付金具３２及び上部締付金具３３は環状から形成され、中央の貫通孔の内周側面にはネジ棒３１の側周面のネジ山に対応する螺旋状のネジ山が形成されている。 Each screw rod 31 implanted on the surface of the adjustment connecting plate 3 is screwed with a lower fastening bracket 32 and an upper fastening bracket 33 on the lower side and the upper side with a base plate 71 to be fitted interposed therebetween. The The lower tightening bracket 32 and the upper tightening bracket 33 are formed in an annular shape, and a spiral thread corresponding to the thread on the side peripheral surface of the screw rod 31 is formed on the inner peripheral side surface of the central through hole. .

各下部締付金具３２の上面にベース板７１の下面が直接接することにより、各下部締付金具３２は建屋構造物の柱７を通じて作用する荷重を直接支えてネジ棒３１を通じて支持盤２側に伝達する機能を果たす。即ち、複数の下部締付金具３２は、これら複数の下部締付金具３２の貫通孔の内周側面のネジ山とネジ棒３１の側周面のネジ山との係合で建屋構造物の全荷重を支えることができるようになっている。 When the lower surface of the base plate 71 is in direct contact with the upper surface of each lower fastening bracket 32, each lower fastening bracket 32 directly supports the load acting through the column 7 of the building structure, and passes to the support panel 2 side through the screw rod 31. It performs the function of transmitting. That is, the plurality of lower clamps 32 are formed by engaging the threads on the inner peripheral side surfaces of the through holes of the plurality of lower clamps 32 and the screw threads on the side peripheral surfaces of the screw rods 31. The load can be supported.

しかも下部締付金具３２はネジ棒３１に螺合されているため、何れかの方向に少し回すことにより、上下方向に微少移動でき、下部締付金具３２の高さを微調整することが可能である。このため、調整連結板３の表面が傾いて水平でない場合には、各ネジ棒３１に螺合されている下部締付金具３２の高さを微調整して下部締付金具３２の上面が水平になるように調整することができる。 Moreover, since the lower clamp 32 is screwed to the screw rod 31, it can be slightly moved in the vertical direction by slightly turning in either direction, and the height of the lower clamp 32 can be finely adjusted. It is. For this reason, when the surface of the adjustment connecting plate 3 is inclined and not horizontal, the height of the lower fastening bracket 32 screwed to each screw rod 31 is finely adjusted so that the upper surface of the lower fastening bracket 32 is horizontal. Can be adjusted.

上部締付金具３３は、下部締付金具３２の上面に接して支えられる建屋構造物の柱７のベース板７１が振動や曲げモーメントの働きによって上向きの外力が作用して上方に移動したり外れたりするのを阻止する機能を果たす。即ち、複数の上部締付金具３３は、これら複数の上部締付金具３３の貫通孔の内周側面のネジ山とネジ棒３１の側周面のネジ山との係合で上向きに作用する外力に抵抗できるようになっている。 The upper clamp 33 is moved upward or downward when the base plate 71 of the column 7 of the building structure supported in contact with the upper surface of the lower clamp 32 is subjected to an upward external force by the action of vibration or bending moment. It plays a function to prevent or That is, the plurality of upper tightening brackets 33 are external forces that act upward by engaging the threads on the inner peripheral side surface of the through holes of the plurality of upper tightening brackets 33 with the screw threads on the side peripheral surface of the screw rod 31. Can resist.

支持盤２の上部の支持板２４の表面に取り付けられる調整連結板３は、施工誤差などにより水平にならず僅かに傾いて固着されることがある。このため、周辺側にネジ棒３１が植設された調整連結板３の上面中心３ａには、その周囲の全方向の何れかの方向に僅かに傾斜した状態でも水平状態のベース板７１の中心を支承する支承突起３４が高さ調節自在に設けられている。 The adjustment connecting plate 3 attached to the surface of the support plate 24 on the upper side of the support plate 2 may be fixed slightly tilted without being horizontal due to construction errors. For this reason, the center 3a of the base plate 71 in the horizontal state, even if it is slightly tilted in any of all directions around the upper surface center 3a of the adjustment connecting plate 3 in which the screw rods 31 are implanted on the peripheral side, is provided. A support projection 34 is provided to adjust the height.

支承突起３４は例えば棒状の形状を有しその側周面には螺旋状にネジ山が形成され、調整連結板３の上面中心３ａには下向きにネジ孔が穿設され、このネジ孔に支承突起３４の下部側が螺入して高さが調節される。ベース板７１の下面が接する支承突起３４の上端側は丸み帯びた形状をしていて、ベース板７１に対して相対的に支承突起３４が３６０度の全方向の何れかの方向に傾いた状態で支持できるようになっている。 The support projection 34 has, for example, a rod-like shape, and a screw thread is formed in a spiral shape on the side peripheral surface thereof, and a screw hole is formed in the upper surface center 3a of the adjustment connecting plate 3 downward. The lower side of the protrusion 34 is screwed to adjust the height. The upper end side of the support protrusion 34 with which the lower surface of the base plate 71 is in contact has a rounded shape, and the support protrusion 34 is inclined relative to the base plate 71 in any direction of 360 degrees. It can be supported by.

また、前記したように調整連結板３は支持盤２の上部の支持板２４の表面に隅肉溶接ａ又はボルト３５によって固定されるが、図１０に図示するボルト３５で固定される場合には調整連結板３の周縁側にはボルト３５を螺入挿通させるためのネジ孔３５ａが上下方向に穿設されている。ボルト３５は、その下部側がこのネジ孔３５ａを螺入挿通し、その下側の支持板２４に現場で穿設されるネジ孔に螺合することで、調整連結板３を支持板２４に固定させる構造になっている。 Further, as described above, the adjustment connecting plate 3 is fixed to the surface of the support plate 24 on the upper side of the support plate 2 by the fillet weld a or the bolt 35, but in the case of being fixed by the bolt 35 shown in FIG. On the peripheral side of the adjustment connecting plate 3, a screw hole 35a for threading and inserting the bolt 35 is formed in the vertical direction. The lower side of the bolt 35 is screwed into the screw hole 35 a and is screwed into a screw hole drilled in the field on the lower support plate 24, thereby fixing the adjustment connecting plate 3 to the support plate 24. It is a structure to let you.

次に、上記施工用ジョイント盤を用いた建屋基礎の施工法について以下説明する。
所定位置の地盤中に鋼管杭６を所定の深さに沈設する機械を用いて沈設させる。沈設された鋼管杭６は、打設時の施工状態や地盤の状態によって、真っ直ぐに沈設されずに僅かに傾いたり、位置がずれたりすることがある。 Next, the construction method of the building foundation using the construction joint board will be described below.
The steel pipe pile 6 is set in the ground at a predetermined position by using a machine that sets the pipe 6 to a predetermined depth. The steel pipe pile 6 that has been laid may not be straightly laid but may be slightly tilted or shifted in position depending on the construction state or the ground condition at the time of placing.

このとき、従来の特開２００５−２００８７９と異なり、鋼管杭６の杭先端６１に施工用ジョイント盤１の下端を溶接する必要がないので、溶接のために地盤中に沈設された鋼管杭６の杭先端側６３の周囲の土砂を取り除く必要がなく、このため掘削作業を不要にでき、その分作業効率を高めることができる。 At this time, unlike the conventional Japanese Patent Application Laid-Open No. 2005-200879, it is not necessary to weld the lower end of the construction joint board 1 to the pile tip 61 of the steel pipe pile 6, so that the steel pipe pile 6 submerged in the ground for welding is used. It is not necessary to remove the earth and sand around the pile front end side 63. Therefore, excavation work can be made unnecessary, and work efficiency can be increased accordingly.

切断機を使用して、地盤の表面から一部突出する鋼管杭６の杭先端側６３を所望の長さで水平に切断する。この切断作業は現場作業であり、工場での切断作業のように正確に水平切断することは困難で傾き誤差が生じ易い。 Using a cutting machine, the pile tip side 63 of the steel pipe pile 6 partially protruding from the surface of the ground is cut horizontally at a desired length. This cutting operation is an on-site operation, and it is difficult to accurately perform horizontal cutting as in a factory cutting operation, and an inclination error tends to occur.

切断された鋼管杭６の杭先端６１に施工用ジョイント盤１を取り付ける前に、杭先端側６３の側面に連通孔６３ａをあける。連通孔６３ａは相対向する面に上下に合計で例えば４箇所にあけるが、鋼管杭６の管径が小さい場合には２箇所になる。連通孔６３ａは杭先端側内部６２に注入したモルタル２１をその外周側に流出させる通路であるため、下側の孔の直径を大きくあける。連通孔６３ａの孔あけ作業は例えばガスを使って行われる。 Before attaching the construction joint board 1 to the pile tip 61 of the cut steel pipe pile 6, a communication hole 63a is opened on the side surface of the pile tip side 63. The communication holes 63a are provided at a total of, for example, four locations on the opposing surfaces, but there are two locations when the pipe diameter of the steel pipe pile 6 is small. Since the communication hole 63a is a passage through which the mortar 21 injected into the pile tip side inside 62 flows out to the outer peripheral side, the diameter of the lower hole is made large. The drilling operation of the communication hole 63a is performed using, for example, gas.

杭先端側内部６２に内部モルタル受板２５を取り付ける。例えば４本の吊り具２５ａの下端に引っ掛けられた内部モルタル受板２５を杭先端側内部６２に挿入して、４本の吊り具２５ａの先端のフックを先ほどあけた連通孔６３ａにそれぞれ引っ掛ける。これにより、内部モルタル受板２５は杭先端側内部６２の上部側に吊持される。また、杭先端側６３の外周側面に必要に応じて、連通孔６３ａを開ける前に滑り止め６３ｂをその全周又は一部に隅肉溶接によって固着する。 The internal mortar receiving plate 25 is attached to the pile tip side inside 62. For example, the internal mortar receiving plate 25 hooked on the lower ends of the four hanging tools 25a is inserted into the pile tip side inside 62, and the hooks at the tips of the four hanging tools 25a are respectively hooked on the communication holes 63a opened earlier. Thereby, the internal mortar receiving plate 25 is suspended by the upper part side of the pile front end side inside 62. Further, if necessary, an anti-slip 63b is fixed to the entire periphery or a part of the outer peripheral side surface of the pile front end side 63 by fillet welding before opening the communication hole 63a.

この後に施工用ジョイント盤１の取り付け作業が行われる。施工用ジョイント盤１の取り付け作業は、施工用ジョイント盤１を構成する支持盤２の支持板２４の下面に固設されている支持外筒２２を杭先端側６３の外周側に装着して支持板２４を杭先端６１に載せて取り付ける。支持外筒２２の内周側面の上端側にはガイド兼補強リブ２２ａが取り付けられているので、このガイド兼補強リブ２２ａを利用することにより、支持外筒２２は杭先端側６３の外周側にずれることなくその中央が正確に装着される。半円形リング板に２分割されている外部モルタル受板２６を杭先端側６３を両側から挟むようにして、支持外筒２２の下端に取り付け、仮付け溶接で固定する。 Thereafter, the installation work of the construction joint board 1 is performed. The mounting work of the construction joint board 1 is supported by attaching a support outer cylinder 22 fixed on the lower surface of the support plate 24 of the support board 2 constituting the construction joint board 1 to the outer peripheral side of the pile front end side 63. The plate 24 is mounted on the pile tip 61. Since the guide / reinforcement rib 22 a is attached to the upper end side of the inner peripheral side surface of the support outer cylinder 22, the support outer cylinder 22 is placed on the outer periphery side of the pile front end side 63 by using this guide / reinforcement rib 22 a. The center is mounted accurately without shifting. The external mortar receiving plate 26 divided into two semicircular ring plates is attached to the lower end of the support outer cylinder 22 with the pile tip side 63 sandwiched from both sides and fixed by tack welding.

施工用ジョイント盤１を取り付ける前に、必要に応じて、鋼管杭６の杭先端側内部６２の内周側面の全周又は一部に図示しない滑り止めが取り付けられる。滑り止めは硬化後のモルタル２１の外周側面と凹凸状に密着して、モルタル２１の外周側面と杭先端側内部６２の内周側面との滑り抵抗を高めて、鋼管杭６の杭先端側６３の曲げ剛性を高める。また硬化後のモルタル２１が杭先端側内部６２を滑り落下するのを防ぐ。なお、滑り止めを杭先端側内部６２の内周側面に隅肉溶接する場合には、元々が主要部の溶接でなく単に付属部の溶接であり、しかも突き合わせ溶接でもないので、溶接部分のＸ線検査も不要となっている。加えて、滑り止めの取り付けのための隅肉溶接は、鋼管杭６の杭先端６１から杭先端側内部６２に向けての下向き溶接であるので、杭先端側６３の周囲の地盤を掘削する必要がなく、簡単に行うことができる。 Before attaching the construction joint board 1, a slip stopper (not shown) is attached to the entire circumference or a part of the inner circumferential side surface of the pile front side inside 62 of the steel pipe pile 6 as necessary. The non-slip is in close contact with the outer peripheral side surface of the cured mortar 21 in an uneven manner to increase the slip resistance between the outer peripheral side surface of the mortar 21 and the inner peripheral side surface of the pile tip side inside 62, and the pile tip side 63 of the steel pipe pile 6. Increases the bending rigidity. Further, the cured mortar 21 is prevented from sliding and falling on the inside 62 of the pile tip side. In addition, when the anti-slip is welded to the inner peripheral side surface of the pile tip side inside 62, the original is not the welding of the main part but the welding of the attached part, and not the butt welding. Line inspection is also unnecessary. In addition, the fillet weld for attaching the anti-slip is a downward welding from the pile tip 61 of the steel pipe pile 6 toward the pile tip side inside 62, so it is necessary to excavate the ground around the pile tip side 63 There is no, can be done easily.

その後、支持板２４のモルタル注入孔２４ａを通じて、杭先端側内部６２にモルタル２１を注入する。杭先端側内部６２に注入されたモルタル２１の一部は杭先端側６３の側面に形成された複数の連通孔６３ａを通ってその外周側に押し出される。そして、注入したモルタル２１が杭先端側内部６２及び杭先端側６３の外周側に十分に充填されると、注入したモルタル２１の一部がモルタル注入孔２４ａの周囲に形成した空気排出孔２４ｂから漏れ始めるので、これを確認して注入を止める。 Thereafter, the mortar 21 is injected into the pile tip side inside 62 through the mortar injection hole 24 a of the support plate 24. A part of the mortar 21 injected into the pile tip side inside 62 is pushed out to the outer peripheral side through a plurality of communication holes 63 a formed on the side surface of the pile tip side 63. Then, when the injected mortar 21 is sufficiently filled in the outer peripheral side of the pile tip side inner 62 and the pile tip side 63, a part of the injected mortar 21 is formed from the air discharge hole 24b formed around the mortar injection hole 24a. As it begins to leak, confirm this and stop the injection.

注入したモルタル２１は内部モルタル受板２５によって受けられて杭先端内部６２を落下して流出するのが防がれる。同様にモルタル２１は外部モルタル受板２６によって受けられて杭先端側６３の外周側を落下して流出するのが防がれる。注入したモルタル２１が杭先端側６３の内外で硬化すると、施工用ジョイント盤１は硬化後のモルタル２１の働きによって鋼管杭６の杭先端６１に固定される。 The injected mortar 21 is received by the internal mortar receiving plate 25 and is prevented from falling and flowing out of the pile tip inside 62. Similarly, the mortar 21 is received by the external mortar receiving plate 26 and is prevented from falling and flowing out on the outer peripheral side of the pile front end side 63. When the injected mortar 21 is cured inside and outside the pile tip side 63, the construction joint board 1 is fixed to the pile tip 61 of the steel pipe pile 6 by the action of the mortar 21 after hardening.

このとき、従来の特開２００５−２００８７９と異なり、現場での突き合わせ溶接を不要にできる。突き合わせ溶接では溶接の品質が要求され、特に近時の構造物耐震偽装問題の発覚以降では検査が厳しくなり、突き合わせ溶接部分のＸ線検査も要求されるが、突き合わせ溶接を不要にすることにより、このような手間とコストのかかる検査を省略することができる。 At this time, unlike conventional Japanese Patent Application Laid-Open No. 2005-200879, on-site butt welding can be eliminated. Butt welding requires weld quality, especially after the recent discovery of seismic impersonation problems in structures, and inspections are required to be rigorous, and X-ray inspection of butt welds is also required, but by making butt welding unnecessary, Such troublesome and costly inspection can be omitted.

鋼管杭６の杭先端６１が水平に切断されている場合には、施工用ジョイント盤１を鋼管杭６の杭先端６１の上に水平に取り付けることができる。しかし、鋼管杭６の中心軸ｈが水平方向の何れかの方向にずれている場合、施工用ジョイント盤１の中心軸ｈも鋼管杭６と同一状態でずれる。また、鋼管杭６が僅かに傾いて沈設されることに起因し或いは切断時の誤差に起因して鋼管杭６の杭先端６１の切断平面が水平より僅かに傾いて切断されている場合には、施工用ジョイント盤１を鋼管杭６の杭先端６１の上に水平に取り付けることができず、施工用ジョイント盤１は僅かに傾いた状態で取り付けられる。 When the pile tip 61 of the steel pipe pile 6 is cut horizontally, the construction joint board 1 can be mounted horizontally on the pile tip 61 of the steel pipe pile 6. However, when the central axis h of the steel pipe pile 6 is shifted in any direction in the horizontal direction, the central axis h of the construction joint board 1 is also shifted in the same state as the steel pipe pile 6. Further, when the cutting plane of the pile tip 61 of the steel pipe pile 6 is cut slightly inclined from the horizontal due to the steel pipe pile 6 being set inclined slightly or due to an error during cutting. The construction joint board 1 cannot be mounted horizontally on the pile tip 61 of the steel pipe pile 6, and the construction joint board 1 is attached in a slightly inclined state.

施工用ジョイント盤１の支持盤２を鋼管杭６の杭先端６１に硬化したモルタル２１で固定した後、支持盤２の上部の支持板２４の表面に調整連結板３を取り付ける。計測により施工用ジョイント盤１の中心軸ｈがずれている場合には、調整連結板３で芯ずれを調整する。 After fixing the support board 2 of the construction joint board 1 to the pile tip 61 of the steel pipe pile 6 with the hardened mortar 21, the adjustment connecting plate 3 is attached to the surface of the support board 24 on the upper side of the support board 2. When the central axis h of the construction joint board 1 is shifted due to the measurement, the misalignment is adjusted by the adjustment connecting plate 3.

即ち、調整連結板３の上面中心３ａに設けられた支承突起３４の上端が設置予定の建屋構造物の柱７の中心軸ｋに一致するように、調整連結板３を支持板２４の表面上をスライド移動調整させる。この場合、調整連結板３の上面中心３ａに設けられた支承突起３４の上端に接する柱７の下端のベース板７１の高さが所定の高さになるように支承突起３４の上端の高さを微調整する。また、調整連結板３の各ネジ棒３１の位置が柱７の下端のベース板７１に形成された各ネジ棒孔７２と一致させながら移動調整する。 That is, the adjustment coupling plate 3 is placed on the surface of the support plate 24 so that the upper end of the support projection 34 provided at the upper surface center 3a of the adjustment coupling plate 3 coincides with the central axis k of the column 7 of the building structure to be installed. Adjust the slide movement. In this case, the height of the upper end of the support projection 34 is set so that the height of the base plate 71 at the lower end of the column 7 in contact with the upper end of the support projection 34 provided at the upper surface center 3a of the adjustment connecting plate 3 becomes a predetermined height. Tweak the. Further, the position of each screw rod 31 of the adjustment connecting plate 3 is moved and adjusted while being aligned with each screw rod hole 72 formed in the base plate 71 at the lower end of the column 7.

調整連結板３を支持板２４の表面上をスライド移動調整して、調整連結板３の上面中心３ａに設けられた支承突起３４の上端を予定位置の建屋構造物の柱７の中心軸ｋに一致させた後、調整連結板３を支持板２４の表面に固定する。固定方法としては、前述したように隅肉溶接ａ又はボルト３５によって行われる。 The adjustment coupling plate 3 is slid and adjusted on the surface of the support plate 24, and the upper end of the support projection 34 provided on the upper surface center 3a of the adjustment coupling plate 3 is set to the central axis k of the pillar 7 of the building structure at the predetermined position. After matching, the adjustment connecting plate 3 is fixed to the surface of the support plate 24. As the fixing method, as described above, fillet welding a or bolt 35 is used.

隅肉溶接ａ（図１、図６〜図８参照）の場合には調整連結板３の周縁を溶着して支持板２４の表面に固定する。隅肉溶接ａは鋼管杭６の杭先端６１の上方で下向きの溶接であるため、杭先端側６３の周囲の地盤を掘削することなく行うことができる。また、突き合わせ溶接と異なり溶接が簡単でき、またＸ線検査なども要求されない。なお、図３〜図８においては、その正面部分の隅肉溶接ａの状況を省略している。 In the case of fillet weld a (see FIGS. 1 and 6 to 8), the peripheral edge of the adjustment connecting plate 3 is welded and fixed to the surface of the support plate 24. Since the fillet weld a is a downward welding above the pile tip 61 of the steel pipe pile 6, it can be performed without excavating the ground around the pile tip side 63. Further, unlike butt welding, welding can be performed easily, and X-ray inspection is not required. 3 to 8, the situation of the fillet weld a in the front portion is omitted.

また、ボルト３５で固定する場合（図９〜図１３参照）には、調整連結板３の周縁側に穿設されているネジ孔３５ａの位置を支持板２４の対応する位置にマーキングし、現場にてネジ孔機を用いて支持板２４の対応箇所を穿設してネジ孔を形成した後、ボルト３５を調整連結板３のネジ孔３５ａを螺入挿通しその下部側を下側の支持板２４のネジ孔に螺入して、調整連結板３を支持板２４の表面に固定する。 Further, when fixing with the bolt 35 (see FIGS. 9 to 13), the position of the screw hole 35a drilled on the peripheral side of the adjustment connecting plate 3 is marked at the corresponding position on the support plate 24, After the corresponding holes of the support plate 24 are drilled using the screw hole machine to form screw holes, the bolts 35 are screwed into the screw holes 35a of the adjustment connecting plate 3 and the lower side thereof is supported on the lower side. The adjustment connecting plate 3 is fixed to the surface of the support plate 24 by screwing into the screw holes of the plate 24.

調整連結板３の表面に植設された各ネジ棒３１に下部締付金具３２を螺合して取り付け、計測しながら各下部締付金具３２の上面を結ぶ仮想平面が所定高さの水平面になるように各下部締付金具３２を回しながら微調整する。各下部締付金具３２は１回転する間に螺子運動によって上下に僅かに移動するだけであるため、微調整が可能となる。 A lower clamp 32 is screwed onto each screw rod 31 planted on the surface of the adjustment connecting plate 3, and a virtual plane connecting the upper surfaces of the lower clamps 32 is measured to a horizontal plane with a predetermined height. Make fine adjustments while turning each lower clamp 32 so that Since each lower clamp 32 is only slightly moved up and down by screw motion during one rotation, fine adjustment is possible.

その後、建屋構造物の柱７の下端に固着されたベース板７１を上方から下ろし、ベース板７１に形成された各ネジ棒孔７２に調整連結板３の表面の各ネジ棒３１を相対的に挿入させて、ベース板７１を調整連結板３上に取り付ける。ベース板７１の各ネジ棒孔７２に調整連結板３の各ネジ棒３１を挿通させた後、各ネジ棒３１に上部締付金具３３を螺合して締め付けて、上部締付金具３３と下部締付金具３２とにより上下から挟圧連結支持して、建屋構造物の各柱７を各鋼管杭６の杭先端６１に施工用ジョイント盤１を介して連結支持させる。 Thereafter, the base plate 71 fixed to the lower end of the column 7 of the building structure is lowered from above, and the screw rods 31 on the surface of the adjustment connecting plate 3 are relatively moved to the screw rod holes 72 formed in the base plate 71. The base plate 71 is attached on the adjustment connecting plate 3 by being inserted. After the screw rods 31 of the adjustment connecting plate 3 are inserted into the screw rod holes 72 of the base plate 71, the upper fastening brackets 33 are screwed into the screw rods 31 and tightened. The pillars 7 of the building structure are connected and supported to the pile tips 61 of the steel pipe piles 6 via the construction joint board 1 by being clamped and supported by the fastening metal fittings 32 from above and below.

以上のようにして、建屋構造物の各柱７の施工用ジョイント盤１を介して各鋼管杭６の上端に連結支持した後、必要に応じて、ネジ棒３１及び下部締付金具３２、上部締付金具３３を無収縮のコンクリートで覆う。コンクリートで覆うのはネジ棒３１及び下部締付金具３２、上部締付金具３３が腐蝕するのを回避するため及び柱７の軸力でベース板７１が変形しないようにするためである。 As described above, after connecting and supporting the upper end of each steel pipe pile 6 via the construction joint board 1 of each column 7 of the building structure, the screw rod 31 and the lower fastening bracket 32, the upper part, as necessary. The fastening bracket 33 is covered with non-shrinkable concrete. The reason for covering with the concrete is to prevent the screw rod 31, the lower fastening bracket 32, and the upper fastening bracket 33 from being corroded and to prevent the base plate 71 from being deformed by the axial force of the column 7.

なお、この発明は上記発明を実施するための形態に限定されるものではなく、この発明の精神を逸脱しない範囲で種々の改変をなし得ることは勿論である。 The present invention is not limited to the embodiment for carrying out the invention, and it goes without saying that various modifications can be made without departing from the spirit of the invention.

１施工用ジョイント盤
２支持盤
２１モルタル
２２支持外筒
２２ａガイド兼補強リブ
２２ｂ滑り止め
２３外部補強板
２４支持板
２４ａモルタル注入孔
２４ｂ空気排出孔
２５内部モルタル受板
２５ａ吊り具
２６外部モルタル受板
３調整連結板
３ａ調整連結板の上面中心
３１ネジ棒
３２下部締付金具
３３上部締付金具
３４支承突起
３５ボルト
３５ａネジ孔
６鋼管杭
６１杭先端
６２杭先端側内部
６３杭先端側
６３ａ連通孔
６３ｂ滑り止め
７建屋構造物の柱
７１ベース板
７２ネジ棒孔
ａ隅肉溶接
ｈ鋼管杭の中心軸、施工用ジョイント盤の中心軸
ｋ建屋構造物の柱の中心軸 DESCRIPTION OF SYMBOLS 1 Construction joint board 2 Support board 21 Mortar 22 Support outer cylinder 22a Guide / reinforcement rib 22b Non-slip 23 External reinforcement plate 24 Support plate 24a Mortar injection hole 24b Air discharge hole 25 Internal mortar receiving plate 25a Lifting tool 26 External mortar receiving plate 3 Adjustment connecting plate 3a Center of upper surface of adjustment connecting plate 31 Screw rod 32 Lower clamp bracket 33 Upper clamp bracket 34 Bearing projection 35 Bolt 35a Screw hole 6 Steel pipe pile 61 Pile tip 62 Pile tip side inside 63 Pile tip side 63a Communication hole 63b Non-slip 7 Column of building structure 71 Base plate 72 Screw rod hole a Fillet weld h Central axis of steel pipe pile, central axis of joint panel for construction k Central axis of column of building structure

Claims

地盤に沈設した鋼管杭を所望長さで切断し、鋼管杭の切断後の杭先端側に連通孔をあけ、注入されるモルタルが流出するのを防ぐ内部モルタル受板を杭先端側内部に挿入して取り付け、支持盤の支持外筒を支持板が上端に固定された上記支持外筒の内周側面の上端側に等間隔で放射状に複数取り付けられその上端面が該支持板の下面に当接して当該支持板を補強しその先端面が杭先端側の外周側面に当接することで当該杭先端側の外周側面を外側から補強し且つその下部側が斜め下向きの傾斜面に形成され下方に向かって拡開して支持外筒を杭先端側の外側に嵌合する場合の位置決めのガイドとして機能するガイド兼補強リブを利用して杭先端側の外周側に装着して、支持外筒の上端側に固定された支持盤の支持板を杭先端に当接して載置した後に、支持外筒の内周側と杭先端側の外周側との間に注入されるモルタルが流出するのを防ぐ外部モルタル受板を支持外筒の下端に取り付け、モルタルを杭先端側内部に注入して杭先端側内部及び支持外筒の内周側と杭先端側の外周側との間に充填し、硬化したモルタルで支持盤を杭先端側に固定し、モルタル硬化後に杭先端より広い上記支持板表面に、上面に複数のネジ棒が植設された調整連結板の上面中心の支承突起の上端が設置予定位置の建屋構造物の柱の中心軸に一致するように且つ調整連結板の各ネジ棒を建屋構造物の柱の下端に固着されたベース板に形成された各ネジ棒孔に一致するように上記調整連結板を移動調整しながら固定し、調整連結板の上面に植設された各ネジ棒に各下部締付金具をそれぞれ各下部締付金具の上面を結ぶ仮想平面が所定高さの水平面になるように微調整しながら螺合し、上記ベース板を下ろして該ベース板の各ネジ棒孔に各ネジ棒を挿通させ、上記ベース板の下面を各下部締付金具の上面に接した後に、各ネジ棒に上部締付金具を螺合して締め付けて、建屋構造物の各柱を各鋼管杭の杭先端に、上記支持盤及び調整連結板から構成される施工用ジョイント盤を介して連結支持させることを特徴とする建屋基礎の施工法。 Cut the steel pipe pile set in the ground to the desired length, open a communication hole on the pile tip side after cutting the steel pipe pile, and insert an internal mortar receiving plate inside the pile tip side to prevent the injected mortar from flowing out A plurality of support outer cylinders of the support plate are radially attached at equal intervals to the upper end side of the inner peripheral side surface of the support outer cylinder with the support plate fixed to the upper end. The support plate is reinforced and the tip end surface abuts the outer peripheral side surface of the pile tip side to reinforce the outer peripheral side surface of the pile tip side from the outside, and the lower side is formed as a slanting downward inclined surface and faces downward. Using the guide / reinforcing rib that functions as a positioning guide when the support outer cylinder is fitted to the outside of the pile tip side, it is attached to the outer periphery side of the pile tip side. the support plate of the support plate which is fixed to the upper end side is placed in contact with the pile tip Later, an external mortar receiving plate that prevents the mortar injected between the inner periphery side of the support outer cylinder and the outer periphery side of the pile tip side from flowing out is attached to the lower end of the support outer cylinder, and the mortar is placed inside the pile tip side. Filled between the inside of the pile tip side and the inner circumference side of the support outer cylinder and the outer circumference side of the pile tip side, and fixed the support board on the pile tip side with hardened mortar, wider than the pile tip after hardening the mortar The adjustment connecting plate so that the upper end of the support projection at the center of the upper surface of the adjustment connecting plate having a plurality of screw rods planted on the upper surface thereof coincides with the center axis of the pillar of the building structure at the planned installation position. The adjustment connecting plate is moved and adjusted so that it is aligned with each screw rod hole formed in the base plate fixed to the lower end of the pillar of the building structure, and is planted on the upper surface of the adjustment connecting plate. Each lower clamp is attached to each screw rod installed on the upper surface of each lower clamp The base plane is lowered so that the imaginary plane to be connected becomes a horizontal plane of a predetermined height, the base plate is lowered, the screw rods are inserted into the screw rod holes of the base plate, and the lower surface of the base plate is After coming into contact with the upper surface of the lower clamp, the upper clamp is screwed onto each screw rod and tightened, and each column of the building structure is attached to the pile tip of each steel pipe pile from the support plate and the adjustment connecting plate. A construction method for a building foundation characterized in that it is connected and supported through a constructed joint board.

請求項１の建屋基礎の施工法において使用され、沈設された鋼管杭の切断後の杭先端と建屋構造物の柱の下端に固着されたベース板との間に取り付けられ鋼管杭の杭先端に建屋構造物の柱の下端を連結支持させる建屋基礎の施工用ジョイント盤であって、鋼管杭の杭先端側の外周側に装着され注入硬化後のモルタルで固定される支持外筒と、支持外筒の外周側面に取り付けられ上方に向かって外方に拡張する複数の外部補強板と、支持外筒の上端に固定され外部補強板で補強支持され支持外筒より広く且つ施工時に鋼管杭の切断後の杭先端に当接して載置されモルタル注入孔を有し該モルタル注入孔の周囲の杭先端側の外周側と支持外筒の内周側との間に位置するように複数の空気排出孔が形成され該杭先端より広い平面板状の支持板と、この支持板が上端に固定された上記支持外筒の内周側面の上端側に等間隔で放射状に複数取り付けられその上端面が該支持板の下面に当接して当該支持板を補強しその先端面が杭先端側の外周側面に当接することで当該杭先端側の外周側面を外側から補強し且つその下部側が斜め下向きの傾斜面に形成され下方に向かって拡開して支持外筒を杭先端側の外側に嵌合する場合の位置決めのガイドとして機能するガイド兼補強リブと、杭先端側内部に挿入されて取り付けられ鋼管杭の杭先端側内部に注入されるモルタルが杭内部を落下して流出するのを防ぐ内部モルタル受板と、支持外筒の下端に取り付けられ支持外筒の内周側と杭先端側の外周側との間に注入されるモルタルが流出するのを防ぐ外部モルタル受板と、を備えた支持盤と、
施工時に上記ベース板の下面を上面で接して支持し高さ方向微調整可能な下部締付金具と該下部締付金具と協動して上記ベース板の上面を挟圧する上部締付金具とが螺合されるネジ棒が上記ベース板に形成されたネジ棒孔位置に対応してその上面に複数植設され上面中心に上端が丸みを帯びた高さ調節自在な支承突起を備え施工時に上記ベース板の設置予定位置に合わせて上記支持盤の支持板の表面上で移動調整されて固定される調整連結板と、から少なくとも構成したことを特徴とする建屋基礎の施工用ジョイント盤。 It is used in the construction method of the building foundation of claim 1 and is attached between the pile tip after cutting of the laid steel pipe pile and the base plate fixed to the lower end of the column of the building structure. A joint machine for construction of the building foundation that connects and supports the lower ends of the pillars of the building structure, and is attached to the outer peripheral side of the pile tip side of the steel pipe pile and fixed with a mortar after injection hardening, a plurality of external reinforcing plate that extends outwardly upwardly attached to the outer peripheral side surface of the cylinder, the support outer tube upper end is fixed to the steel pipe pile at reinforcing supported wide rather and construction than the support outer tube outside reinforcing plates A plurality of air so as to be placed between the outer peripheral side of the tip end of the pile and the inner peripheral side of the supporting outer cylinder around the mortar injection hole, which is placed in contact with the tip of the pile after cutting. a flat plate-like support plate wider than該杭tip discharge hole is formed, this The support plate is fixed to the upper end of the support outer cylinder, and a plurality of radial attachments are attached to the upper end side of the inner peripheral side surface at equal intervals. The upper end surfaces of the support outer tube abut against the lower surface of the support plate to reinforce the support plate. Abuts against the outer peripheral side surface of the pile tip side to reinforce the outer peripheral side surface of the pile tip side from the outside, and the lower side is formed in a slanting downward slant surface and expands downwards to support the outer cylinder The guide and reinforcement ribs that function as positioning guides when fitted on the outer side of the side, and the mortar that is inserted and attached to the inside of the pile tip side and injected into the pile tip side of the steel pipe pile falls inside the pile. An external mortar that prevents the mortar from flowing out between the inner peripheral side of the support outer cylinder and the outer peripheral side of the pile tip side attached to the lower end of the support outer cylinder A support plate provided with a backing plate;
A lower fastening bracket that supports the lower surface of the base plate in contact with the upper surface at the time of construction and can be finely adjusted in the height direction, and an upper fastening bracket that cooperates with the lower fastening bracket to clamp the upper surface of the base plate. A plurality of screw rods to be screwed corresponding to the positions of the screw rod holes formed on the base plate are provided on the upper surface thereof, and provided with a height-adjustable support projection having a rounded upper end at the center of the upper surface at the time of construction. A building foundation construction joint board comprising at least an adjustment connecting plate which is moved and adjusted on the surface of the support board of the support board in accordance with a planned installation position of the base board.