JP2022078187A - Foundation construction method by pressing-in durable block for repairing foundation - Google Patents

Foundation construction method by pressing-in durable block for repairing foundation Download PDF

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JP2022078187A
JP2022078187A JP2022032170A JP2022032170A JP2022078187A JP 2022078187 A JP2022078187 A JP 2022078187A JP 2022032170 A JP2022032170 A JP 2022032170A JP 2022032170 A JP2022032170 A JP 2022032170A JP 2022078187 A JP2022078187 A JP 2022078187A
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block
durable
foundation
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芳男 長嶋
Yoshio Nagashima
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DAICHO TOKUSHU DOBOKU KK
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Abstract

PROBLEM TO BE SOLVED: To provide a foundation construction method by pressing-in durable blocks for repairing a foundation which does not require a welding work of a connection portion.
SOLUTION: In a foundation construction method by pressing-in durable blocks for repairing a foundation: durable blocks with a central through hole are stacked and a reinforcement is inserted into the through hole to constitute a block foundation pile; a hydraulic jack is installed between the durable block and a building foundation bottom; by operating the hydraulic jack, the durable blocks are pressed-in by utilizing a reactive force of building self-weight to complete a pressing-in step of first stage blocks; and second stage blocks are mounted on upper faces of the first stage blocks and the reinforcement is inserted into the through holes of the first stage blocks and the through holes of the second stage blocks to connect the first stage blocks with the second stage blocks and then to go to a pressing-in step of the second stage blocks. Thereafter, until reaching the step number of completing a block pile with a predetermined load, the step are continued and the block pile with the predetermined load is completed. Cement milk is injected into a filling groove of the durable block and a peripheral gap of the block pile, to surround the periphery of the block pile with the cement milk.
SELECTED DRAWING: Figure 1
COPYRIGHT: (C)2022,JPO&INPIT

Description

本発明は、傾斜家屋の基礎の修復にあたり、ジャッキ使用による圧入工法による家屋基礎施工法に関する。より詳しくは、耐久ブロックのジャッキアップ圧入による家屋基礎としての、ブロック基礎杭の施工法に関する。 The present invention relates to a house foundation construction method by a press-fitting method using a jack when repairing a foundation of a sloping house. More specifically, the present invention relates to a method of constructing a block foundation pile as a house foundation by jack-up press fitting of a durable block.

傾斜家屋の基礎の修復にあたり、基礎と家屋との間に油圧ジャッキを介在させ、家屋荷重を利用して、基礎材を沈下きせるところの、ジャッキアップ家屋基礎施工法か存在する。たとえは゛ジャッキ使用により鋼管杭のジャッキアッフ゜圧入工法て゛、複数本の鋼管杭を順次圧入するとともに、上下の鋼管杭を連結することて゛、1本の基礎杭を形成している。 When repairing the foundation of a sloping house, there is a jack-up house foundation construction method in which a hydraulic jack is interposed between the foundation and the house and the foundation material can be subsided by using the load of the house. For example, "a jack-up press-fitting method for steel pipe piles by using jacks", a plurality of steel pipe piles are sequentially press-fitted, and upper and lower steel pipe piles are connected to form one foundation pile.

特開2007-169988号JP-A-2007-169988

特許文献1(発明の名称:支持杭の圧入法及び載荷試験方法)は、上下の鋼管杭を連結して1本の基礎杭A‘を形成するにあたり、
図10に示すごとく、鋼管杭100の連結部に単管101を挿入し、単管101の上端と鋼管杭100の内面とを溶接Wすることで、上下の鋼管杭を一体化している。
すなわち、鋼管杭の内面側において溶接作業を必要とする。鋼管杭の内面側での溶接作業は、全周面にわたっての完全な溶接は困難であるとともに、溶接状態の完全な確認は困難である。
上記の問題解決すべく,鋼管杭の連結部の外側に単管を挿入し、単管の上端と鋼管杭の外面とを溶接することで、上下の鋼管杭を一体化することか考えられるか゛、鋼管杭の連結部の一体化か゛不十分となり、障害物の存在で圧入時に、連結部か゛屈曲して、基礎杭の直進性が悪化する問題点かある。
Patent Document 1 (title of the invention: press-fitting method of support pile and loading test method) describes connecting upper and lower steel pipe piles to form one foundation pile A'.
As shown in FIG. 10, the single pipe 101 is inserted into the connecting portion of the steel pipe pile 100, and the upper end of the single pipe 101 and the inner surface of the steel pipe pile 100 are welded W to integrate the upper and lower steel pipe piles.
That is, welding work is required on the inner surface side of the steel pipe pile. In the welding work on the inner surface side of the steel pipe pile, it is difficult to completely weld over the entire peripheral surface, and it is difficult to completely confirm the welded state.
In order to solve the above problem, is it possible to integrate the upper and lower steel pipe piles by inserting a single pipe outside the connecting part of the steel pipe pile and welding the upper end of the single pipe to the outer surface of the steel pipe pile? There is a problem that the integration of the connecting portion of the steel pipe pile becomes insufficient, and the connecting portion bends at the time of press fitting due to the presence of an obstacle, and the straightness of the foundation pile deteriorates.

本発明は、鋼管杭の上記問題点を解消すべく、連結部についての溶接作業を不要とすることを課題とする。
さらに、基礎資材として汎用の耐久ブロックを使用することを課題とする。
An object of the present invention is to eliminate the need for welding work on a connecting portion in order to solve the above-mentioned problems of steel pipe piles.
Further, it is an object to use a general-purpose durable block as a basic material.

本願発明は、
中心貫通孔を有する耐久ブロックを積重ね、貫通孔に鉄筋を挿入し、ブロック基礎杭を構成するとともに、
耐久ブロックと建築物基礎底との間に油圧ジャッキを設置し、
油圧ジャッキを操作することで家屋の自重の反力を利用して耐久ブロック圧入して1段目のブロックの圧入工程を完成し、
1段目のブロックの上面に2段目のブロックを乗せ、1段目のブロックの貫通こうと2段目のブロックの貫通孔とに鉄筋を装入して、1段目のブロックと2段目のブロックとを相互に連結したのち、
2段目のブロックの圧入工程に進み、
以後、この工程の継続で所定荷重のブロック杭を完成する段数に達するまで、前記工程を継続して、所定荷重のブロック杭を完成する。
さらに、その表面に充てん溝を有する耐久ブロックを使用し、耐久ブロックの充てん溝およびブロック杭の周囲隙間にセメントミルクを注入して、ブロック杭の周囲をセメントミルクで包囲したことを特徴とする。
The invention of the present application is
Durable blocks with central through holes are stacked, reinforcing bars are inserted into the through holes to form block foundation piles, and
Install a hydraulic jack between the durable block and the bottom of the building foundation,
By operating the hydraulic jack, the reaction force of the house's own weight is used to press-fit the durable block to complete the press-fit process of the first block.
Place the second block on the upper surface of the first block, insert reinforcing bars into the through holes of the first block and the through holes of the second block, and insert the reinforcing bars into the first block and the second block. After connecting the eye blocks to each other,
Proceed to the press-fitting process of the second block,
After that, the process is continued until the number of stages for completing the block pile with the predetermined load is reached by continuing this process, and the block pile with the predetermined load is completed.
Further, it is characterized in that a durable block having a filling groove on its surface is used, cement milk is injected into the filling groove of the durable block and the peripheral gap of the block pile, and the circumference of the block pile is surrounded by cement milk.

本願発明は、傾斜家屋の基礎の修復にあたり、ジャッキ使用による圧入工法による家屋基礎施工法にあたり、溶接作業を不要とするとともに、基礎資材として汎用の耐久ブロックを使用することで、必要とする資材の調達・準備を容易にするとともに、施工コストを低減する効果を有する。 The present invention is a method of constructing a foundation of a house by a press-fitting method using a jack for repairing the foundation of a sloping house, which eliminates the need for welding work and uses a general-purpose durable block as a foundation material. It has the effect of facilitating procurement and preparation and reducing construction costs.

本発明の耐久ブロック基礎杭施工法の施工例を示す略図。The schematic diagram which shows the construction example of the durable block foundation pile construction method of this invention. 耐久ブロックの斜視図。Perspective view of the durable block. 本発明の耐久ブロック基礎杭施工法の作業工程を示す略図。The schematic diagram which shows the working process of the durable block foundation pile construction method of this invention. 本発明による耐久ブロック圧入施工手順を示し、堀削作業の説明図。An explanatory view of excavation work showing a durable block press-fitting construction procedure according to the present invention. 同じく、所定荷重のブロック杭の説明図。Similarly, an explanatory diagram of a block pile with a predetermined load. 同じく、基礎修復のためのジャッキアップの作業完了を示す説明図。Similarly, an explanatory diagram showing the completion of the jack-up work for foundation repair. 同じく、セメントミルクを注入を示す説明図。Similarly, an explanatory diagram showing the injection of cement milk. 同じく、スペーサ設置を示す説明図。Similarly, an explanatory diagram showing spacer installation. 同じく、埋め戻し、間詰注入を示す説明図。Similarly, an explanatory diagram showing backfilling and filling injection. 公知の鋼管杭施工法の施工例を示す略図。The schematic diagram which shows the construction example of the known steel pipe pile construction method.

本発明の耐久ブロック基礎杭は、図1を参照して、中心貫通孔(鉄筋挿入穴)11を有する耐久ブロック1を積重ね、貫通孔11に鉄筋2を挿入して、上下に隣接する耐久ブロックを相互に連結して一体化し、所定荷重のブロック杭を完成するための段数の、耐久ブロックを上下方向に一本に形成することで、ブロック基礎杭Aを完成する。
なお、実施例においては、耐久ブロック1は、図2を参照して、2m X 2m の正方形の平面で、高さ1.5mで、表面に充てん溝12を形成した。
鉄筋2について、0.16m径の異形鉄筋で長さは1.5mを標準とした。
In the durable block foundation pile of the present invention, referring to FIG. 1, durable blocks 1 having a central through hole (reinforcing bar insertion hole) 11 are stacked, and reinforcing bars 2 are inserted into the through holes 11 to vertically adjacent durable blocks. The block foundation pile A is completed by forming a single durable block in the vertical direction, which has the number of steps for completing a block pile with a predetermined load by connecting and integrating the two to each other.
In the example, the durable block 1 was a square plane of 2 m × 2 m with a height of 1.5 m, and a filling groove 12 was formed on the surface of the durable block 1 with reference to FIG.
As for the reinforcing bar 2, the standard length is 1.5 m with a deformed reinforcing bar having a diameter of 0.16 m.

次に、第3図を参照して、本発明の耐久ブロック基礎杭Aの完成までの、作業工程を説明する。
イ.作業空間3を形成する。
ロ.作業空間3に1段目の耐久ブロック1を設置する。
ハ.1段目の耐久ブロック1と建築物基礎9の底面との間に油圧ジャッキ4を設置する。
二.油圧ジャッキ4を操作することで家屋の自重の反力を利用して耐久ブロック圧入する。1段目のブロックの貫通孔11に、鉄筋2を挿入する。鉄筋2の下半分をブロック下方へ露出させる。---1段目のブロックの圧入工程を完成----
ホ.二段目の油圧ジャッキを設置し、鉄筋2を貫通孔11に挿入、充てん溝12にセメントを充てんして、「1段目のブロック1と2段目のブロック1とを連結する。
ヘ.以後、この工程の継続で、所定荷重のブロック杭Aとする段数の耐久ブロックの圧入を完成する。
ブロック杭の周囲隙間、および重点溝12にセメントミルクを注入して、ブロック杭の周囲をセメントミルクで包囲するとともに、複数の耐久ブロック1と複数の鉄筋とを相互に固定して一体化して所定荷重のブロック杭Aを完成する。
Next, with reference to FIG. 3, the work process up to the completion of the durable block foundation pile A of the present invention will be described.
I. The work space 3 is formed.
B. The first-stage durable block 1 is installed in the work space 3.
C. A hydraulic jack 4 is installed between the first-stage durable block 1 and the bottom surface of the building foundation 9.
two. By operating the hydraulic jack 4, the endurance block is press-fitted using the reaction force of the house's own weight. The reinforcing bar 2 is inserted into the through hole 11 of the first-stage block. The lower half of the reinforcing bar 2 is exposed below the block. --- Completed the press-fitting process of the first block ---
E. A second-stage hydraulic jack is installed, the reinforcing bar 2 is inserted into the through hole 11, the filling groove 12 is filled with cement, and "the first-stage block 1 and the second-stage block 1 are connected.
F. After that, by continuing this process, the press-fitting of the durable blocks having the number of steps to be the block pile A having a predetermined load is completed.
Cement milk is injected into the gap around the block pile and the priority groove 12, and the circumference of the block pile is surrounded by cement milk, and the plurality of durable blocks 1 and the plurality of reinforcing bars are mutually fixed and integrated to be predetermined. Complete the load block pile A.

つき゛に、図4ないし図9を参照して、本願発明の耐久ブロック圧入式基礎杭施工法を適用した基礎修復に関して、施工手順例を説明する。
a. 堀削(図4)
家屋をジャッキアップするにあたり、耐久ブロック圧入、およひ、その作業スペースを確保するため、家屋基礎直下の地面を方形状に堀削して、作業空間3を確保する。
In addition, with reference to FIGS. 4 to 9, an example of a construction procedure will be described with respect to a foundation repair to which the durable block press-fit type foundation pile construction method of the present invention is applied.
a. Excavation (Fig. 4)
When jacking up a house, in order to press-fit the durable block and secure the work space, the ground directly under the foundation of the house is excavated in a square shape to secure the work space 3.

b.耐久ブロック圧入(本願発明の実施による耐久ブロック杭の形成)(図5)
耐久ブロック上部に油圧ジャッキ4を設置し、油圧ジャッキ4の頭部を建物10建物基礎の底面に作用させる。
家屋の自重の反力を利用して耐久ブロックを油圧ジャッキにて圧入する。
1段目の耐久ブロックの圧入が完成する。
つぎの耐久ブロック1を取付ける
貫通孔10に連結用鉄筋2を差し込み、上下の耐久ブロックを相互に連結する。
以後、耐久ブロックの積層による耐久ブロック杭が支持盤層20に達するまで、この行程を継続する。
b. Durable block press-fitting (formation of durable block piles by implementing the present invention) (Fig. 5)
A hydraulic jack 4 is installed on the upper part of the durable block, and the head of the hydraulic jack 4 acts on the bottom surface of the building 10 building foundation.
The durable block is press-fitted with a hydraulic jack using the reaction force of the house's own weight.
The press-fitting of the first-stage durable block is completed.
Insert the connecting reinforcing bar 2 into the through hole 10 to which the next durable block 1 is attached, and connect the upper and lower durable blocks to each other.
After that, this process is continued until the durable block piles formed by laminating the durable blocks reach the support board layer 20.

c.ジャッキアップ(図6)
耐久ブロック圧入の完了後、全ジャッキアップ作業個所に油圧ジャッキ4aを設置し、家屋傾斜の修正を開始する。
基礎コンクリート、外壁などの異常、および家屋レベルの変動を常時監視しながら、少しずつジャッキアップしていき、所定レベルまて゛、家屋の沈下を修正する。
c. Jack up (Fig. 6)
After the press-fitting of the durable block is completed, hydraulic jacks 4a are installed at all jack-up work points, and the correction of the inclination of the house is started.
While constantly monitoring the abnormalities of the foundation concrete, outer walls, etc., and changes in the house level, jack up little by little to correct the subsidence of the house to the specified level.

d.セメントミルク充填(図7)
所定レベルに家屋傾斜修正が完了したのち、耐久ブロック杭と耐久ブロックの周辺地盤との間にできた隙間にセメントミルク5を充填する。
積層した耐久ブロックは互いに連結されて一体化して耐久ブロック杭Aが完成する。
d. Filling with cement milk (Fig. 7)
After the house inclination correction is completed to a predetermined level, cement milk 5 is filled in the gap formed between the durable block pile and the ground around the durable block.
The laminated durable blocks are connected to each other and integrated to complete the durable block pile A.

e.埋め戻し、間詰注入準備工(図8)
耐久ブロック杭Aの上面と建物基礎10aの底面との間に、油圧ジャッキに代えてスペーサ6を設置する。
堀削した個所まで、埋め戻して復旧する。
トンネル部3aには埋め戻し前に間詰め注入するための注入管8を設置する。(図8)
e. Backfilling, filling injection preparation work (Fig. 8)
A spacer 6 is installed in place of the hydraulic jack between the upper surface of the durable block pile A and the bottom surface of the building foundation 10a.
It will be restored by backfilling up to the excavated part.
An injection pipe 8 for filling and injecting is installed in the tunnel portion 3a before backfilling. (Fig. 8)

f.間詰注入(図9)
家屋修正で浮き上がった基礎と地面との隙間にセメント系注入剤による間詰注入を実施し、基礎と地面との間にセメント系注入材をゆき渡らせる。(図9)
以上により、施工完了となる。
f. Filling injection (Fig. 9)
A cement-based injection agent is used to inject the gap between the foundation and the ground that has been lifted by the house modification, and the cement-based injection material is spread between the foundation and the ground. (Fig. 9)
With the above, the construction is completed.

本願発明は、施工資材として、汎用の耐久ブロックと、鉄筋を使用するものであるから、施工準備を容易とするとともに、施工コストの低減を図る効果を有するものであることで、建物基礎修復に関する産業の発展に寄与するものである。 Since the present invention uses a general-purpose durable block and reinforcing bars as construction materials, it has the effect of facilitating construction preparation and reducing construction costs, and thus relates to building foundation repair. It contributes to the development of industry.

A ブロック基礎杭
1 耐久ブロック
2 鉄筋
4、 油圧ジャッキ
5 セメントミルク
11 中心貫通孔(鉄筋挿入穴)
12 充てん溝
A block foundation pile 1 durable block 2 rebar 4, hydraulic jack 5 cement milk 11 center through hole (reinforcing bar insertion hole)
12 Filling groove

Claims (1)

中心貫通孔を有する耐久ブロックを積重ね、中心貫通孔に鉄筋を挿入し、耐久ブロック基礎杭を構成するとともに、
耐久ブロックと建築物基礎底との間に油圧ジャッキを設置し、
油圧ジャッキを操作することで家屋の自重の反力を利用して耐久ブロック圧入して1段目の耐久ブロックの圧入工程を完成し、
1段目のブロックの上面に2段目の耐久ブロックを乗せ、1段目の耐久ブロックの貫通こうと2段目のブロックの貫通孔とに鉄筋を装入して、1段目の耐久ブロックと2段目の耐久ブロックとを相互に連結したのち、
2段目のブロックの圧入工程に進み、
以後、この工程の継続で所定荷重のブロック杭を完成する段数に達するまで、前記工程を継続して、所定荷重のブロック杭を完成するとともに、
その表面に充てん溝を有する耐久ブロックを使用し、耐久ブロックの充てん溝およびブロック杭の周囲隙間にセメントミルクを注入して、ブロック杭の周囲をセメントミルクで包囲したことを特徴とする、基礎修復のための耐久ブロック圧入基礎施工法
Durable blocks with a central through hole are stacked, and reinforcing bars are inserted into the central through hole to form a durable block foundation pile.
Install a hydraulic jack between the durable block and the bottom of the building foundation,
By operating the hydraulic jack, the reaction force of the house's own weight is used to press-fit the durable block to complete the press-fitting process of the first-stage durable block.
The second-stage durable block is placed on the upper surface of the first-stage block, and reinforcing bars are inserted into the through holes of the first-stage durable block and the through-holes of the second-stage block to penetrate the first-stage durable block. After connecting the second stage durable block to each other,
Proceed to the press-fitting process of the second block,
After that, the process is continued until the number of stages to complete the block pile with the predetermined load is reached by continuing this process, and the block pile with the predetermined load is completed.
A foundation repair characterized by using a durable block having a filling groove on its surface, injecting cement milk into the filling groove of the durable block and the gap around the block pile, and surrounding the block pile with cement milk. Durable block press-fit foundation construction method for
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