JP2014020116A - Pile concrete placing method - Google Patents

Pile concrete placing method Download PDF

Info

Publication number
JP2014020116A
JP2014020116A JP2012160058A JP2012160058A JP2014020116A JP 2014020116 A JP2014020116 A JP 2014020116A JP 2012160058 A JP2012160058 A JP 2012160058A JP 2012160058 A JP2012160058 A JP 2012160058A JP 2014020116 A JP2014020116 A JP 2014020116A
Authority
JP
Japan
Prior art keywords
guide member
pile
concrete
hose
step portion
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
Application number
JP2012160058A
Other languages
Japanese (ja)
Other versions
JP5904585B2 (en
Inventor
Takafumi Iizuka
崇文 飯塚
Hideo Nukushina
秀夫 温品
Yukihiro Oda
幸弘 小田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Taisei Corp
Original Assignee
Taisei Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Taisei Corp filed Critical Taisei Corp
Priority to JP2012160058A priority Critical patent/JP5904585B2/en
Publication of JP2014020116A publication Critical patent/JP2014020116A/en
Application granted granted Critical
Publication of JP5904585B2 publication Critical patent/JP5904585B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Abstract

PROBLEM TO BE SOLVED: To provide a pile concrete placing method capable of securing the maximum vertical accuracy of an underground piled column when placing a pile concrete after erecting the underground piled column.SOLUTION: An underground piled column 1 is previously manufactured and includes a lower-stage part 10 having an approximately cross shape in cross section, an upper-stage part 20 having an approximately rectangular frame shape in cross section, joined to the upper end of the lower-stage part 10, and an annular guide member 40 provided on the lower-stage part 10 while encircling the lower-stage part 10. The pile concrete placing method includes a step S2 of inserting the underground piled column 1 into a pile hole 3, extending a fishing line 50 upward from the lower end of the lower-stage part 10, passing it through the inside the guide member 40 and exposing it from the pile hole 3 to a ground, a step S3 of inserting a tremie pipe 60 into the pile hole 3 along the fishing line 50, and guiding the tremie pipe 60 through the inside of the guide member 40 to the lower end of the underground piled column 1, and a step S4 of placing the pile concrete through the inside of the tremie pipe 60.

Description

本発明は、杭コンクリート打設方法に関する。詳しくは、逆打ち工法により構真柱が打ち込まれる杭の杭コンクリートの打設方法に関する。   The present invention relates to a pile concrete placing method. Specifically, the present invention relates to a method for placing pile concrete of a pile into which a structural pillar is driven by a reverse driving method.

従来より、工期を短縮するため、逆打ち工法により建物を構築する場合がある。
この場合、例えば、地中に杭穴を掘削して、この杭穴に鉄筋かごを挿入して杭コンクリートを打設するとともに、杭コンクリートに構真柱を建て込んで、構真柱の下段部を杭に一体化させる。その後、地面を掘削しながら、地下階を下方に向かって順に構築すると同時に、構真柱の上端部に地上階の鉄骨を接続して、地上階を上方に向かって順に構築する。
これにより、地下階の工事と地上階の工事とを同時進行できるので、工期を短縮できる。
Conventionally, in order to shorten the construction period, there is a case where a building is constructed by a reverse driving method.
In this case, for example, a pile hole is excavated in the ground, a reinforcing steel basket is inserted into the pile hole, and pile concrete is placed. Is integrated into the pile. Then, while excavating the ground, the basement floor is constructed in order downward, and at the same time, the ground floor steel frame is connected to the upper end portion of the structural pillar, and the ground floor is constructed in order upward.
As a result, the construction of the underground floor and the construction of the ground floor can be carried out simultaneously, so that the construction period can be shortened.

ところで、杭コンクリートの打設方法としては、構真柱を建て込んだ後に杭コンクリートを打設するいわゆる構真柱先決め工法と、杭コンクリートを打設した後に構真柱を建て込むいわゆる構真柱後決め工法と、がある。このうち、構真柱先決め工法によれば、ジャッキなどで構真柱の建て入れを固めた後に杭コンクリートを打設するので、構真柱後決め工法のように生コンクリートの硬化時間を考慮する必要がないから、構真柱を高精度で建て込むことができる(特許文献1参照)。   By the way, there are two methods for placing pile concrete: the so-called construction pillar pre-decoration method in which pile concrete is placed after the construction of the construction pillar, and the so-called construction construction in which construction pillars are built after placing the pile concrete. There is a post-post construction method. Of these, according to the construction method of the timber pillar, pile concrete is placed after the construction of the timber pillar is hardened with a jack or the like. Since there is no need to do this, the structural pillar can be built with high accuracy (see Patent Document 1).

特許第3878772号公報Japanese Patent No. 3878772

ところで、上述の構真柱方法では、構真柱を建て込んだ後、構真柱の側面に沿ってトレミー管を配置し、このトレミー管を通して、杭コンクリートを打設する。よって、トレミー管の先端から吐出される生コンクリートによって構真柱の下段部が一方向に押されて、構真柱の鉛直精度を確保することが難しくなる、という問題があった。   By the way, in the above-mentioned method, the treble pipe is arranged along the side face of the true pillar and the pile concrete is placed through the tremy pipe. Therefore, there has been a problem that it is difficult to ensure the vertical accuracy of the structural pillar because the lower step of the structural pillar is pushed in one direction by the ready-mixed concrete discharged from the tip of the tremy tube.

特に、杭径が小さかったり、杭体の配筋が密であったりすると、トレミー管を1本とする必要があるが、この場合、特に生コンクリートによる片押し現象が顕著となっていた。   In particular, when the pile diameter is small or the reinforcement of the pile body is dense, it is necessary to use one tremy pipe.

また、構真柱が傾斜した場合、構真柱の鉛直精度を水中ジャッキ等で修正することが考えられるが、実際には、構真柱下段部の動きに生コンクリートが抵抗するので、建て入れを修正することは困難であった。   In addition, when the structural pillar is tilted, it may be possible to correct the vertical accuracy of the structural pillar with an underwater jack or the like, but in reality, the ready-mixed concrete resists the movement of the lower section of the structural pillar. It was difficult to correct.

本発明は、構真柱を建て込んだ後に杭コンクリートを打設する場合に、構真柱の鉛直精度を極力確保できる杭コンクリート打設方法を提供することを目的とする。   An object of this invention is to provide the pile concrete placement method which can ensure the vertical accuracy of a structure pillar as much as possible when pile concrete is cast after building a structure pillar.

請求項1に記載の杭コンクリート打設方法は、逆打ち工法による杭コンクリートの打設方法であって、断面略十字形状の下段部(例えば、後述の下段部10)と、当該下段部の上端に接合された断面略環状または断面略矩形枠状の上段部(例えば、後述の上段部20)と、前記下段部に設けられて当該下段部を囲む環状の誘導部材(例えば、後述の誘導部材40、40A、40B)と、を備える構真柱(例えば、後述の構真柱1)を製作しておき、杭穴(例えば、後述の杭穴3)の内部に前記構真柱を挿入するとともに、道糸(例えば、後述の道糸50)を前記構真柱の下段部の下端から上方に延ばして前記誘導部材の内側を通過させて前記杭穴から地上に露出させる工程(例えば、後述のステップS2)と、前記道糸に沿わせてコンクリート打設用ホース(例えば、後述のトレミー管60)を杭穴に挿入し、当該コンクリート打設用ホースを前記誘導部材の内側を通して前記構真柱の下端まで誘導する工程(例えば、後述のステップS3)と、当該コンクリート打設用ホースの内部を通して、杭コンクリートを打設する工程(例えば、後述のステップS4)と、を備えることを特徴とする。   The pile concrete placement method according to claim 1 is a pile concrete placement method by a reverse casting method, and includes a lower step portion (for example, a lower step portion 10 described later) and an upper end of the lower step portion. An upper step portion (for example, an upper step portion 20 described later) joined to the lower step portion and an annular guide member (for example, a later-described guide member described later) provided on the lower step portion and surrounding the lower step portion. 40, 40A, 40B) are prepared, and the post is inserted into a pile hole (eg, a post hole 3 described below). In addition, a step of extending a road thread (for example, a road thread 50 described later) upward from the lower end of the lower step portion of the stem column and passing the inside of the guide member to be exposed to the ground from the pile hole (for example, described later) Step S2) and the concrete along the road A step of inserting a hose for placing (for example, a tremy tube 60 described later) into the pile hole and guiding the concrete placing hose through the inside of the guide member to the lower end of the structural pillar (for example, step S3 described later) ) And a step of placing pile concrete through the inside of the concrete placing hose (for example, step S4 described later).

この発明によれば、地上から、コンクリート打設用ホースを道糸に沿わせて杭穴に挿入していくと、このコンクリート打設用ホースは、誘導部材の内側を通って、構真柱の下端に至る。このとき、コンクリート打設用ホースは、誘導部材によって構真柱の柱芯寄りに誘導される。
したがって、杭コンクリートを打設する際、この杭コンクリートは、構真柱の柱芯の近傍に吐出されるから、杭コンクリートにより構真柱が一方向に押されるのを防止でき、構真柱の鉛直精度を極力確保できる。
According to this invention, when the concrete placement hose is inserted into the pile hole along the road line from the ground, the concrete placement hose passes through the inside of the guide member, To the bottom. At this time, the concrete placing hose is guided toward the column core of the structural pillar by the guide member.
Therefore, when placing pile concrete, this pile concrete is discharged in the vicinity of the pillar core of the construction pillar, so that the construction pillar can be prevented from being pushed in one direction by the pile concrete. Vertical accuracy can be ensured as much as possible.

請求項2に記載の杭コンクリート打設方法は、前記コンクリート打設用ホースは、複数本の直線状の鋼管ホース(例えば、後述の鋼管ホース61)と、複数本の可撓性を有するゴムホース(例えば、後述のゴムホース62)と、を連結部材(例えば、後述の連結部材63)で連結して構成されることを特徴とする。   The pile concrete placing method according to claim 2, wherein the concrete placing hose includes a plurality of straight steel pipe hoses (for example, a steel pipe hose 61 described later) and a plurality of flexible rubber hoses ( For example, a rubber hose 62) described later is connected by a connecting member (for example, a connecting member 63 described later).

この発明によれば、鋼管ホースとゴムホースとを適宜組み合わせてコンクリート打設用ホースを構成したので、コンクリート打設用ホースを誘導部材で湾曲させて、柱芯に向かって確実に誘導できる。   According to the present invention, the concrete placing hose is configured by appropriately combining the steel pipe hose and the rubber hose, so that the concrete placing hose can be bent by the guiding member and reliably guided toward the column core.

請求項3に記載の杭コンクリート打設方法は、前記誘導部材(例えば、後述の誘導部材40、40A)は、略水平面内で円環状の平鋼材または上方に向かうに従って外側に拡がる円環状の平鋼材(例えば、後述の平鋼材41、41A)と、前記平鋼材の内縁に取り付けられて下方に向かうに従って外側に拡がる円環状の平鋼材(例えば、後述の平鋼材42、42A)と、を備えることを特徴とする。   The pile concrete placing method according to claim 3 is characterized in that the guide member (for example, guide members 40 and 40A described later) is an annular flat steel material in an approximately horizontal plane or an annular flat surface that expands outward as it goes upward. Steel materials (for example, flat steel materials 41 and 41A described later) and annular flat steel materials (for example, flat steel materials 42 and 42A described later) that are attached to the inner edge of the flat steel material and expand outward as it goes downward. It is characterized by that.

この発明によれば、誘導部材の下側を、下方に向かうに従って外側に拡がる円環状の平鋼材としたので、誘導部材の内側からコンクリート打設用ホースを引き抜く際、このコンクリート打設用ホースが誘導部材の内側の表面を摺動しても、コンクリート打設用ホースの連結部材が誘導部材に引っ掛かるのを防止して、コンクリート打設用ホースの引抜き作業を円滑に行うことができる。   According to the present invention, since the lower side of the guide member is an annular flat steel material that expands outward as it goes downward, when the concrete placement hose is pulled out from the inside of the guide member, Even if the inner surface of the guide member slides, the connecting member of the concrete placement hose can be prevented from being caught by the guide member, and the concrete placement hose can be pulled out smoothly.

また、誘導部材の上側を、上方に向かうに従って外側に拡がる円環状の平鋼材としたので、コンクリート打設用ホースを誘導部材の内側に挿入する際、コンクリート打設用ホースが誘導部材の内側の表面を摺動しても、コンクリート打設用ホースの連結部材が誘導部材に引っ掛かるのを防止して、コンクリート打設用ホースの挿入作業を円滑に行うことができる。   In addition, since the upper side of the guide member is an annular flat steel material that expands outward as it goes upward, when the concrete placement hose is inserted inside the guide member, the concrete placement hose is placed inside the guide member. Even if the surface is slid, the connecting member of the concrete placing hose can be prevented from being caught by the guide member, and the concrete placing hose can be inserted smoothly.

請求項4に記載の杭コンクリートの打設方法は、前記誘導部材(例えば、後述の誘導部材40B)は、縦断面が円形状かつ円環状の鋼材であり、当該誘導部材の縦断面半径(例えば、後述の半径r)は前記連結部材の前記コンクリート打設用ホースからの突出寸法(例えば、後述の所定寸法d)より大きいことを特徴とする。   In the method for placing pile concrete according to claim 4, the guide member (for example, guide member 40B described later) is a steel material having a circular and annular longitudinal section, and the longitudinal section radius (for example, the guide member) The radius r) described later is larger than the projecting dimension of the connecting member from the concrete placing hose (for example, a predetermined dimension d described later).

この発明によれば、誘導部材の縦断面半径を連結部材のホースからの突出寸法よりも大きくした。よって、コンクリート打設用ホースを誘導部材の内側に挿入する際や、誘導部材の内側からコンクリート打設用ホースを引き抜く際、コンクリート打設用配管は誘導部材の内側の表面を摺動することになるが、このとき、コンクリート打設用ホースの連結部材が誘導部材に引っ掛かるのを防止して、コンクリート打設用ホースの挿入作業および引抜き作業を円滑に行うことができる。   According to this invention, the longitudinal cross-sectional radius of the guide member is made larger than the protruding dimension of the connecting member from the hose. Therefore, when inserting the concrete placement hose inside the guide member, or when pulling out the concrete placement hose from the inside of the guide member, the concrete placement pipe slides on the inside surface of the guide member. However, at this time, the connecting member of the concrete placing hose can be prevented from being caught by the guide member, and the concrete placing hose can be inserted and pulled out smoothly.

本発明によれば、地上から、コンクリート打設用ホースを道糸に沿わせて杭穴に挿入していくと、このコンクリート打設用ホースは、誘導部材の内側を通って、構真柱の下端に至る。このとき、コンクリート打設用ホースは、誘導部材によって構真柱の柱芯寄りに誘導される。したがって、杭コンクリートを打設する際、この杭コンクリートは、構真柱の柱芯の近傍に吐出されるから、杭コンクリートにより構真柱が一方向に押されるのを防止でき、構真柱の鉛直精度を極力確保できる。   According to the present invention, when the concrete placement hose is inserted into the pile hole along the road line from the ground, the concrete placement hose passes through the inside of the guide member, To the bottom. At this time, the concrete placing hose is guided toward the column core of the structural pillar by the guide member. Therefore, when placing pile concrete, this pile concrete is discharged in the vicinity of the pillar core of the construction pillar, so that the construction pillar can be prevented from being pushed in one direction by the pile concrete. Vertical accuracy can be ensured as much as possible.

本発明の第1実施形態に係る杭コンクリートの打設方法が適用される構真柱および杭の断面図である。It is sectional drawing of a built-up pillar and a pile to which the placement method of pile concrete concerning a 1st embodiment of the present invention is applied. 前記実施形態に係る構真柱の接合部近傍の拡大側面図である。It is an enlarged side view of the vicinity of the joint portion of the true pillar according to the embodiment. 図2のA−A断面図である。It is AA sectional drawing of FIG. 図3のB−B断面図である。It is BB sectional drawing of FIG. 前記実施形態に係る構真柱を杭に打ち込む手順のフローチャートである。It is a flowchart of the procedure which drives a built-up pillar concerning the embodiment into a pile. 本発明の第2実施形態に係る杭コンクリートの打設方法が適用される構真柱の誘導部材近傍の拡大断面図である。It is an expanded sectional view of the induction member vicinity of the construction pillar to which the placement method of pile concrete concerning a 2nd embodiment of the present invention is applied. 本発明の第3実施形態に係る杭コンクリートの打設方法が適用される構真柱の誘導部材近傍の拡大断面図である。It is an expanded sectional view of the induction member vicinity of the construction pillar to which the placing method of pile concrete concerning a 3rd embodiment of the present invention is applied.

以下、本発明の実施形態を図面に基づいて説明する。なお、以下の実施形態の説明にあたって、同一構成要件については同一符号を付し、その説明を省略もしくは簡略化する。
〔第1実施形態〕
図1は、本発明の第1実施形態に係る杭コンクリートの打設方法が適用される構真柱および杭の断面図である。
構真柱1は、逆打ち工法に用いられるものであり、杭穴3の内部に形成された場所打ち杭2に打ち込まれる。この構真柱1は、上下方向に延びて場所打ち杭2の中に挿入される下段部10と、この下段部10の上端から上方に延びる上段部20と、下段部10と上段部20との間に設けられた接合部30と、を備える。
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description of the embodiments, the same constituent elements are denoted by the same reference numerals, and the description thereof is omitted or simplified.
[First Embodiment]
FIG. 1 is a cross-sectional view of a built-up column and a pile to which the method for placing pile concrete according to the first embodiment of the present invention is applied.
The structural pillar 1 is used for the reverse driving method and is driven into a cast-in-place pile 2 formed inside the pile hole 3. The structural pillar 1 includes a lower step portion 10 that extends in the vertical direction and is inserted into the cast-in-place pile 2, an upper step portion 20 that extends upward from the upper end of the lower step portion 10, and a lower step portion 10 and an upper step portion 20 And a joint portion 30 provided between the two.

構真柱1は、場所打ち杭2から地盤面(1FL)レベルまで延びており、この構真柱1の接合部30は、地下躯体の基礎のマットスラブの中に位置する。   The structural pillar 1 extends from the cast-in-place pile 2 to the ground surface (1FL) level, and the joint 30 of the structural pillar 1 is located in the mat slab of the foundation of the underground frame.

図2は、構真柱1の接合部30近傍の拡大側面図である。図3は、図2のA−A断面図であり、図4は、図3のB−B断面図である。これら図2〜図4は、杭2の杭コンクリート打設前の状態を示す。
下段部10は、クロスH形鋼11からなる。具体的には、クロスH形鋼11は、断面十字形状のウエブ12と、このウエブ12の端部の設けられた4つのフランジ13と、からなる。
上段部20は、下端が閉塞された断面矩形枠状の角形鋼管21からなる。
FIG. 2 is an enlarged side view of the vicinity of the joint 30 of the true pillar 1. 3 is a cross-sectional view taken along the line AA in FIG. 2, and FIG. 4 is a cross-sectional view taken along the line BB in FIG. These FIGS. 2-4 shows the state before pile concrete placement of the pile 2. FIG.
The lower part 10 is made of a cross H-section steel 11. Specifically, the cross H-section steel 11 includes a web 12 having a cross-shaped cross section and four flanges 13 provided with end portions of the web 12.
The upper stage portion 20 is composed of a rectangular steel pipe 21 having a rectangular frame shape with a closed lower end.

接合部30では、下段部10を構成するクロスH形鋼11の断面十字形状のウエブ12が、上段部20を構成する角形鋼管21の内部まで延長されている。具体的には、上段部20の下端面は、略水平方向に延びる板材 31で閉塞されており、この板材31を挟んで上下にウエブ12が設けられている。   In the joint portion 30, the cross-shaped cross-shaped web 12 of the cross H-section steel 11 constituting the lower step portion 10 is extended to the inside of the square steel pipe 21 constituting the upper step portion 20. Specifically, the lower end surface of the upper stage portion 20 is closed by a plate material 31 extending in a substantially horizontal direction, and the web 12 is provided above and below the plate material 31.

一方、下段部10を構成するクロスH形鋼11のフランジ13は、上段部20を構成する角形鋼管21の下端縁である板材31に接続されている。   On the other hand, the flange 13 of the cross H-section steel 11 constituting the lower step portion 10 is connected to a plate material 31 which is the lower end edge of the square steel pipe 21 constituting the upper step portion 20.

下段部10では、クロスH形鋼11のフランジ13の外側表面には、スタッド14が溶接される。
接合部30では、角形鋼管21の外壁面には、スタッド32が溶接され、この角形鋼管21の内部まで延長されたクロスH形鋼11のウエブ12の表面にも、図示しないスタッドが溶接される。
In the lower step portion 10, a stud 14 is welded to the outer surface of the flange 13 of the cross H-shaped steel 11.
At the joint 30, a stud 32 is welded to the outer wall surface of the square steel pipe 21, and a stud (not shown) is also welded to the surface of the web 12 of the cross H-section steel 11 extended to the inside of the square steel pipe 21. .

また、構真柱1の下段部10の接合部30よりの位置には、下段部10を囲む環状の誘導部材40が取り付けられている。
さらに、構真柱1には、この構真柱1の下段部10の下端から上方に延びて誘導部材40の内側を通り構真柱1の上端に至る道糸50と、この道糸50に案内されて地上から誘導部材40の内側を通り構真柱1の下端に至る一対のコンクリート打設用ホースとしてのトレミー管60と、が設けられている。これら一対のトレミー管60は、構真柱1を挟んで互いに反対側に配置されている。
An annular guide member 40 surrounding the lower step portion 10 is attached at a position from the joint portion 30 of the lower step portion 10 of the structural pillar 1.
Further, the brace 1 includes a road thread 50 that extends upward from the lower end of the lower step portion 10 of the brace 1 and passes through the inside of the guide member 40 to reach the upper end of the brace 1. A pair of treme tubes 60 serving as concrete placing hoses that are guided from the ground to the lower end of the true pillar 1 through the inside of the guide member 40 are provided. The pair of tremy tubes 60 are disposed on opposite sides of the true pillar 1.

誘導部材40は、図4に示すように、略水平面内で円環状の平鋼材41と、この平鋼材41の内縁に溶接されて下方に向かうに従って外側に拡がる円環状の平鋼材42と、を備える。平鋼材42の形状は、具体的には、上段部が切断された円錐表面の形状と同一である。
また、平鋼材41と平鋼材42との成す角度は、θとなっている。
As shown in FIG. 4, the guide member 40 includes an annular flat steel material 41 in a substantially horizontal plane, and an annular flat steel material 42 which is welded to the inner edge of the flat steel material 41 and expands outward as it goes downward. Prepare. Specifically, the shape of the flat steel material 42 is the same as the shape of the conical surface from which the upper step portion is cut.
Further, the angle formed by the flat steel material 41 and the flat steel material 42 is θ.

道糸50は、例えばトラロープである。
各トレミー管60は、複数本の直線状の鋼製の鋼管ホース61と、複数本の可撓性を有するゴムホース62と、を組み合わせて構成される。これら鋼管ホース61同士、ゴムホース62同士、あるいは鋼管ホース61とゴムホース62とは、連結部材63で連結され、この連結部材63は、ホース61、62の表面から所定寸法dだけ突出している。
The road thread 50 is, for example, a trolley.
Each tremy pipe 60 is configured by combining a plurality of straight steel pipe hoses 61 made of steel and a plurality of flexible rubber hoses 62. The steel pipe hoses 61, the rubber hoses 62, or the steel pipe hose 61 and the rubber hose 62 are connected by a connecting member 63. The connecting member 63 protrudes from the surfaces of the hoses 61, 62 by a predetermined dimension d.

トレミー管60は、上段部20の側面に沿って鉛直方向に延びているが、誘導部材40の近傍では、この誘導部材40によって湾曲されて、下段部10のクロスH形鋼11のフランジ13同士の隙間から内側に入り込んで、下段部10の柱芯近傍に誘導されている。よって、トレミー管60のうち誘導部材40よりも上側の部分は、可撓性を有しない鋼管ホース61が用いられ、誘導部材40の近傍よりも下側の部分は、可撓性を有するゴムホース62が用いられる。   The tremy tube 60 extends in the vertical direction along the side surface of the upper step portion 20, but is bent by the guide member 40 in the vicinity of the guide member 40, and the flanges 13 of the cross H-section steel 11 of the lower step portion 10 are connected to each other. It is guided in the vicinity of the column core of the lower step portion 10 through the gap. Therefore, a steel pipe hose 61 having no flexibility is used for the upper part of the tremy tube 60 from the guide member 40, and a flexible rubber hose 62 is used for the part below the vicinity of the guide member 40. Is used.

以上の構真柱1を杭2に打ち込む手順について、図5のフローチャートを参照しながら説明する。
まず、予め構真柱1に誘導部材40および道糸50を取り付けておく。
ステップS1では、地上から掘削して杭穴3を形成し、この杭穴3に図示しない鉄筋かごを挿入する。
The procedure for driving the above-mentioned structural pillar 1 into the pile 2 will be described with reference to the flowchart of FIG.
First, the guide member 40 and the road thread 50 are attached to the stem 1 in advance.
In step S <b> 1, a pile hole 3 is formed by excavation from the ground, and a reinforcing steel cage (not shown) is inserted into the pile hole 3.

ステップS2では、構真柱1を杭穴3に挿入して、建入れ調整装置で構真柱1の建入れを調整する。このとき、道糸50を構真柱1の下段部10の下端から上方に延ばして誘導部材40の内側を通過させて杭穴3から地上に露出させる。
ステップS3では、トレミー管60を道糸50に沿わせて杭穴3に挿入し、トレミー管60の先端を誘導部材40の内側を通して構真柱1の下端まで誘導する。
In step S2, the construction pillar 1 is inserted into the pile hole 3, and the construction of the construction pillar 1 is adjusted by the construction adjustment device. At this time, the road thread 50 extends upward from the lower end of the lower step portion 10 of the stem 1 and passes through the inside of the guide member 40 to be exposed from the pile hole 3 to the ground.
In step S <b> 3, the tremy tube 60 is inserted into the pile hole 3 along the road thread 50, and the tip of the tremy tube 60 is guided through the inside of the guide member 40 to the lower end of the structural pillar 1.

ステップS4では、トレミー管60を徐々に引き上げながら、このトレミー管60の内部を通して、杭コンクリートを打設して、杭2を形成する。   In step S <b> 4, pile concrete is driven through the inside of the tremy tube 60 while the tremy tube 60 is gradually pulled up to form the pile 2.

本実施形態によれば、以下のような効果がある。
(1)地上からトレミー管60を道糸50に沿わせて杭穴3に挿入していくと、このトレミー管60は、誘導部材40の内側を通って、構真柱1の下端に至る。このとき、トレミー管60は、図4に示すように、誘導部材40によって湾曲されて、構真柱1の柱芯寄りに誘導される。
したがって、杭コンクリートを打設すると、この杭コンクリートは、構真柱1の柱芯の近傍に吐出されるから、杭コンクリートにより構真柱1が一方向に押されるのを防止でき、構真柱1の鉛直精度を極力確保できる。
According to this embodiment, there are the following effects.
(1) When the tremy tube 60 is inserted into the pile hole 3 along the road thread 50 from the ground, the tremy tube 60 passes through the inside of the guide member 40 and reaches the lower end of the structural pillar 1. At this time, as shown in FIG. 4, the tremy tube 60 is curved by the guide member 40 and guided toward the column center of the structural pillar 1.
Therefore, when pile concrete is placed, this pile concrete is discharged in the vicinity of the column core of the built-up column 1, so that it can be prevented that the built-up column 1 is pushed in one direction by the pile concrete. 1 vertical accuracy can be ensured as much as possible.

(2)鋼管ホース61とゴムホース62とを適宜組み合わせてトレミー管60を構成したので、トレミー管60を誘導部材40で湾曲させて、柱芯に向かって確実に誘導できる。   (2) Since the tremy tube 60 is configured by appropriately combining the steel tube hose 61 and the rubber hose 62, the tremy tube 60 can be bent with the guide member 40 and reliably guided toward the column core.

(3)誘導部材40の下側を、下方に向かうに従って外側に拡がる円環状の平鋼材42とした。よって、誘導部材40の内側からトレミー管60を引き抜く際、図4中矢印で示すようにトレミー管60が誘導部材40の内側の表面を摺動しても、トレミー管60の連結部材63が誘導部材40に引っ掛かるのを防止して、トレミー管60の引抜き作業を円滑に行うことができる。   (3) The lower side of the guide member 40 is an annular flat steel material 42 that expands outward as it goes downward. Therefore, when the tremmy tube 60 is pulled out from the inner side of the guide member 40, the connecting member 63 of the tremy tube 60 is guided even if the tremy tube 60 slides on the inner surface of the guide member 40 as shown by an arrow in FIG. It is possible to prevent the member 40 from being caught and to smoothly perform the operation of pulling out the tremy tube 60.

〔第2実施形態〕
図6は、本発明の第2実施形態に係る杭コンクリートの打設方法が適用される構真柱1の誘導部材40A近傍の拡大断面図である。
本実施形態では、誘導部材40Aの形状が、第1実施形態と異なる。
すなわち、誘導部材40Aは、上方に向かうに従って外側に拡がる円環状の平鋼材41Aと、この平鋼材41Aの内縁に溶接されて下方に向かうに従って外側に拡がる円環状の平鋼材42Aと、を備える。
平鋼材41A、42Aの形状は、具体的には、上段部が切断された円錐の表面形状と同一である。
平鋼材41Aの水平面に対する角度はφ1であり、平鋼材42Aの水平面に対する角度はφ2となっている。
[Second Embodiment]
FIG. 6 is an enlarged cross-sectional view of the vicinity of the guide member 40A of the structural pillar 1 to which the pile concrete placing method according to the second embodiment of the present invention is applied.
In the present embodiment, the shape of the guide member 40A is different from that of the first embodiment.
That is, the guide member 40A includes an annular flat steel material 41A that expands outward as it goes upward, and an annular flat steel material 42A that is welded to the inner edge of the flat steel material 41A and expands outward as it goes downward.
Specifically, the shape of the flat steel members 41A and 42A is the same as the surface shape of the cone from which the upper portion is cut.
The angle of the flat steel material 41A with respect to the horizontal plane is φ1, and the angle of the flat steel material 42A with respect to the horizontal plane is φ2.

本実施形態によれば、上述の(1)、(2)の効果に加えて、以下のような効果がある。
(4)誘導部材40Aの上側を、上方に向かうに従って外側に拡がる円環状の平鋼材41Aとした。よって、トレミー管60を誘導部材40Aの内側に挿入する際、図6中矢印で示すように、トレミー管60が誘導部材40Aの内側の表面を摺動しても、トレミー管60の連結部材63が誘導部材40Aに引っ掛かるのを防止して、トレミー管60の挿入作業を円滑に行うことができる。
According to this embodiment, in addition to the effects (1) and (2) described above, the following effects can be obtained.
(4) The upper side of the guide member 40A is an annular flat steel material 41A that expands outward as it goes upward. Therefore, when the tremy tube 60 is inserted inside the guide member 40A, even if the tremy tube 60 slides on the inner surface of the guide member 40A, as shown by the arrows in FIG. Is prevented from being caught by the guide member 40A, and the insertion operation of the tremy tube 60 can be performed smoothly.

〔第3実施形態〕
図7は、本発明の第3実施形態に係る杭コンクリートの打設方法が適用される構真柱1の誘導部材40B近傍の拡大断面図である。
本実施形態では、誘導部材40Bの形状が、第1実施形態と異なる。
すなわち、誘導部材40Bは、縦断面が円形状かつ円環状の鋼材である。この誘導部材40Bの縦断面半径rは、連結部材63のホース61、62からの突出寸法dよりも大きくなっている。
[Third Embodiment]
FIG. 7 is an enlarged cross-sectional view of the vicinity of the guide member 40B of the structural pillar 1 to which the pile concrete placing method according to the third embodiment of the present invention is applied.
In the present embodiment, the shape of the guide member 40B is different from that of the first embodiment.
That is, the guide member 40B is a steel material having a circular longitudinal section and an annular shape. The longitudinal section radius r of the guide member 40B is larger than the projecting dimension d of the connecting member 63 from the hoses 61 and 62.

本実施形態によれば、上述の(1)の効果に加えて、以下のような効果がある。
(5)誘導部材40Bの縦断面半径rを連結部材63のホース61、62からの突出寸法dよりも大きくした。よって、トレミー管60を誘導部材40Bの内側に挿入する際や、誘導部材40Bの内側からトレミー管60を引き抜く際、図7中矢印で示すように、トレミー管60は誘導部材の内側の表面を摺動することになるが、このとき、トレミー管60の連結部材63が誘導部材40Bに引っ掛かるのを防止して、トレミー管60の挿入作業および引抜き作業を円滑に行うことができる。
According to the present embodiment, in addition to the above-described effect (1), the following effect can be obtained.
(5) The longitudinal section radius r of the guide member 40B is made larger than the projecting dimension d of the connecting member 63 from the hoses 61 and 62. Therefore, when the tremy tube 60 is inserted inside the guide member 40B, or when the tremy tube 60 is pulled out from the inside of the guide member 40B, as shown by the arrows in FIG. At this time, the connecting member 63 of the tremy tube 60 is prevented from being caught by the guide member 40B, and the insertion operation and the extraction operation of the tremy tube 60 can be performed smoothly.

なお、本発明は前記実施形態に限定されるものではなく、本発明の目的を達成できる範囲での変形、改良等は本発明に含まれるものである。   It should be noted that the present invention is not limited to the above-described embodiment, and modifications, improvements, etc. within a scope that can achieve the object of the present invention are included in the present invention.

1…構真柱
2…杭
3…杭穴
10…下段部
11…クロスH形鋼
12…ウエブ
13…フランジ
14…スタッド
20…上段部
21…角形鋼管
30…接合部
31…板材
32…スタッド
40、40A、40B…誘導部材
41、41A…上側の平鋼材
42、42A…下側の平鋼材
50…道糸
60…トレミー管(コンクリート打設用ホース)
61…鋼管ホース
62…ゴムホース
63…連結部材
DESCRIPTION OF SYMBOLS 1 ... Structural pillar 2 ... Pile 3 ... Pile hole 10 ... Lower step part 11 ... Cross H-section steel 12 ... Web 13 ... Flange 14 ... Stud 20 ... Upper step part 21 ... Square steel pipe 30 ... Joint part 31 ... Plate material 32 ... Stud 40 , 40A, 40B ... Inductive member 41, 41A ... Upper flat steel material 42, 42A ... Lower flat steel material 50 ... Road thread 60 ... Tremy tube (concrete casting hose)
61 ... Steel pipe hose 62 ... Rubber hose 63 ... Connecting member

Claims (4)

逆打ち工法による杭コンクリート打設方法であって、
断面略十字形状の下段部と、当該下段部の上端に接合された断面略環状または断面略矩形枠状の上段部と、前記下段部に設けられて当該下段部を囲む環状の誘導部材と、を備える構真柱を製作しておき、
杭穴の内部に前記構真柱を挿入するとともに、道糸を前記構真柱の下段部の下端から上方に延ばして前記誘導部材の内側を通過させて前記杭穴から地上に露出させる工程と、
前記道糸に沿わせてコンクリート打設用ホースを杭穴に挿入し、当該コンクリート打設用ホースを前記誘導部材の内側を通して前記構真柱の下端まで誘導する工程と、
当該コンクリート打設用ホースの内部を通して、杭コンクリートを打設する工程と、を備えることを特徴とする杭コンクリート打設方法。
It is a pile concrete placing method by the reverse casting method,
A lower step portion having a substantially cross-shaped cross section, an upper step portion having a substantially annular or substantially rectangular frame shape joined to an upper end of the lower step portion, and an annular guide member provided in the lower step portion and surrounding the lower step portion; Make a true pillar with
A step of inserting the stem pillar into the inside of the pile hole, extending a road thread from the lower end of the lower step portion of the stem pillar, passing the inside of the guide member, and exposing the pile hole to the ground; ,
Inserting the concrete placement hose along the road line into the pile hole, and guiding the concrete placement hose through the inside of the guide member to the lower end of the structural pillar;
And a step of placing pile concrete through the inside of the concrete placing hose.
前記コンクリート打設用ホースは、複数本の直線状の鋼管ホースと、複数本の可撓性を有するゴムホースと、を連結部材で連結して構成されることを特徴とする請求項1に記載の杭コンクリート打設方法。   2. The concrete placing hose is configured by connecting a plurality of linear steel pipe hoses and a plurality of flexible rubber hoses using a connecting member. Pile concrete placement method. 前記誘導部材は、略水平面内で円環状の平鋼材または上方に向かうに従って外側に拡がる円環状の平鋼材と、当該平鋼材の内縁に取り付けられて下方に向かうに従って外側に拡がる円環状の平鋼材と、を備えることを特徴とする請求項1または2に記載の杭コンクリート打設方法。   The guide member is an annular flat steel material in a substantially horizontal plane, or an annular flat steel material that expands outward as it goes upward, and an annular flat steel material that is attached to the inner edge of the flat steel material and expands outward as it goes downward The pile concrete placement method according to claim 1 or 2, characterized by comprising: 前記誘導部材は、縦断面が円形状かつ円環状の鋼材であり、当該誘導部材の縦断面半径は前記連結部材の前記コンクリート打設用ホースからの突出寸法より大きいことを特徴とする請求項2に記載の杭コンクリート打設方法。   3. The guide member is a steel material having a circular longitudinal section and an annular shape, and a longitudinal section radius of the guide member is larger than a protruding dimension of the connecting member from the concrete placing hose. The pile concrete placement method described in 1.
JP2012160058A 2012-07-18 2012-07-18 Pile concrete placement method Expired - Fee Related JP5904585B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2012160058A JP5904585B2 (en) 2012-07-18 2012-07-18 Pile concrete placement method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2012160058A JP5904585B2 (en) 2012-07-18 2012-07-18 Pile concrete placement method

Publications (2)

Publication Number Publication Date
JP2014020116A true JP2014020116A (en) 2014-02-03
JP5904585B2 JP5904585B2 (en) 2016-04-13

Family

ID=50195335

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2012160058A Expired - Fee Related JP5904585B2 (en) 2012-07-18 2012-07-18 Pile concrete placement method

Country Status (1)

Country Link
JP (1) JP5904585B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019157508A (en) * 2018-03-13 2019-09-19 大成建設株式会社 Under-ground piled column and seismic base-isolated buildings
JP2021127612A (en) * 2020-02-13 2021-09-02 ジャパンパイル株式会社 Tremie pipe guide rail

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03295931A (en) * 1990-04-12 1991-12-26 Takenaka Komuten Co Ltd Construction method for frame straight pillar
JPH0665924A (en) * 1992-06-29 1994-03-08 Takenaka Komuten Co Ltd Structural stud erection method in inverted construction method
JPH0868057A (en) * 1995-02-23 1996-03-12 Takenaka Komuten Co Ltd Method for constructing composite permanent substructural column
JPH08105072A (en) * 1994-10-06 1996-04-23 Mitsui Constr Co Ltd Erection method of column in inverted construction method
JP2002061172A (en) * 2000-08-22 2002-02-28 Kajima Corp Method for constructing underground continuous wall and the underground continuous wall

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03295931A (en) * 1990-04-12 1991-12-26 Takenaka Komuten Co Ltd Construction method for frame straight pillar
JPH0665924A (en) * 1992-06-29 1994-03-08 Takenaka Komuten Co Ltd Structural stud erection method in inverted construction method
JPH08105072A (en) * 1994-10-06 1996-04-23 Mitsui Constr Co Ltd Erection method of column in inverted construction method
JPH0868057A (en) * 1995-02-23 1996-03-12 Takenaka Komuten Co Ltd Method for constructing composite permanent substructural column
JP2002061172A (en) * 2000-08-22 2002-02-28 Kajima Corp Method for constructing underground continuous wall and the underground continuous wall

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019157508A (en) * 2018-03-13 2019-09-19 大成建設株式会社 Under-ground piled column and seismic base-isolated buildings
JP7106305B2 (en) 2018-03-13 2022-07-26 大成建設株式会社 Structural columns and seismically isolated buildings
JP2021127612A (en) * 2020-02-13 2021-09-02 ジャパンパイル株式会社 Tremie pipe guide rail

Also Published As

Publication number Publication date
JP5904585B2 (en) 2016-04-13

Similar Documents

Publication Publication Date Title
KR101492858B1 (en) apparatus of guide casing for a ground excavator
JP5904585B2 (en) Pile concrete placement method
JP2009007745A (en) Axial-force transmission structure for permanent sub-substructural column and foundation pile, and construction method for permanent sub-substructural column
JP6127760B2 (en) Construction method of construction pillar
KR101571359B1 (en) Connectong structure of steel tube and foundation pile
KR101348339B1 (en) The pressing device of underground strucyure for non-excavation method and its construccting methods thereof
JP2010275708A (en) Method for forming building
JP5686414B2 (en) True pillar
JP5016521B2 (en) Earth anchor and its removal method
JP2016173028A (en) Pile and installation method for pile
JP5965933B2 (en) Pile and pile installation method
JP5204692B2 (en) Pre-boring H-section steel pile
JP2015108262A (en) Reaction receiving member and positioning method for upper surface of permanent steel column
KR101886273B1 (en) Method and apparatus for forming basic support for fence installed in wall
JP6365998B1 (en) Method for reinforcing hollow columnar object using reinforced steel pipe, and reinforcing columnar object
JP2007308951A (en) Method of constructing outer peripheral column by inverted construction method
JP3181886U (en) Precast pile and composite pile structure
JP6130991B2 (en) Foundation structure
US10767333B2 (en) Construction method for foundation pile
JP7194471B2 (en) Annular cofferdam and excavation work temporary facility structure and construction method using square pipe with variable cross-section
JP2010059622A (en) Underground structure and method for constructing the same
JP6464069B2 (en) Templates, template sets and reinforcement methods
JP2004211454A (en) Earth retaining wall and earth retaining construction method
JP5693778B1 (en) Temporary mountain retaining structure and temporary mountain retaining method
JP2016089609A (en) Steel pipe pile

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20141217

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20150918

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20151013

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20151023

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20160309

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20160310

R150 Certificate of patent or registration of utility model

Ref document number: 5904585

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

LAPS Cancellation because of no payment of annual fees