JP4466418B2 - Soil cement wall pile, soil cement structure - Google Patents
Soil cement wall pile, soil cement structure Download PDFInfo
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- JP4466418B2 JP4466418B2 JP2005076691A JP2005076691A JP4466418B2 JP 4466418 B2 JP4466418 B2 JP 4466418B2 JP 2005076691 A JP2005076691 A JP 2005076691A JP 2005076691 A JP2005076691 A JP 2005076691A JP 4466418 B2 JP4466418 B2 JP 4466418B2
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Description
本発明は、建物の基礎杭としても機能し得るソイルセメント柱列壁、ソイルモルタル壁杭、ソイルセメント構造及び前記ソイルセメント柱列壁と基礎杭とからなる基礎構造に関する。 The present invention relates to a soil cement column wall, a soil mortar wall pile, a soil cement structure, and a foundation structure composed of the soil cement column wall and the foundation pile that can also function as a foundation pile of a building.
従来より、建物の地下構造物を施工する場合は、地下構造物の外周に山留め壁を施工し、山留め壁で囲まれた内部を掘削していく工法が広く実施されている。特に、ソイルセメント柱列壁は、比較的に低コストで構築できるため、山留め壁として頻繁に用いられている。そのため、建物の外周の地中には山留め壁が埋設されている。 Conventionally, when constructing an underground structure of a building, a method of constructing a retaining wall on the outer periphery of the underground structure and excavating the interior surrounded by the retaining wall has been widely implemented. In particular, the soil cement column wall is frequently used as a retaining wall because it can be constructed at a relatively low cost. For this reason, a mountain retaining wall is buried in the outer periphery of the building.
しかし、山留め壁には基礎としての機能を期待していないため、建物の外周には山留め壁とは別に基礎杭を設けなければならず、これは非効率である。そこで、例えば特許文献１には、建物外周の要所位置において、山留め壁であるソイルセメント柱列壁のＨ鋼芯材の下端を支持層に到達するように形成し、ソイルセメント柱列壁の一部を基礎構造として用いる方法が記載されている。
特許文献１記載の方法では、ソイルセメント柱列壁の掘削孔一つ分のソイルを支持層まで到達させ、その中心に一本のＨ型鋼を埋設することで、ソイルセメントの柱を形成し、基礎杭の代わりとして用いている。しかし、上記のソイルセメントの柱では、強度が不十分であり建物の鉛直荷重を負担するために十分な鉛直方向及び水平方向の強度を得ることは難しい。 In the method described in Patent Document 1, a soil cement column is formed by burying one H-shaped steel in the center of the soil cement column wall by burying one soil for the excavation hole of the column wall of the soil cement to the support layer, Used as a substitute for foundation piles. However, the above-mentioned soil cement pillars are insufficient in strength and it is difficult to obtain sufficient vertical and horizontal strength to bear the vertical load of the building.
そこで、本発明の目的は、安価で短期間に構築できるとともに、水平方向及び鉛直方向荷重を負担することができるソイルセメント柱列壁及びこのソイルセメント柱列壁と複数の杭からなる基礎構造を提供することである。 Therefore, an object of the present invention is to provide a soil cement column wall that can be constructed at a low cost in a short period of time and can bear a load in the horizontal direction and the vertical direction, and a foundation structure composed of the soil cement column wall and a plurality of piles. Is to provide.
本発明のソイルセメント壁杭は、建物の地中に支持層まで到達するように設けられたソイルセメント柱列壁からなるソイルセメント壁杭であって、前記支持層内のソイルセメントが高強度ソイルセメントにより構成され、横方向に並べた複数本の鉄骨と、これら鉄骨を壁面両側でお互いに連結する横方向に延びる鋼材とを備える芯部材が、ソイルセメント内に埋設され、前記鋼材の他方の鋼材と対向する側の面、及び、前記鉄骨の壁内側の面には、前記支持層内に位置する領域を含めてスタッドが設けられていることを特徴とする。 The soil cement wall pile according to the present invention is a soil cement wall pile including a soil cement column wall provided so as to reach the support layer in the ground of a building , and the soil cement in the support layer is a high strength soil pile. It is composed of cement, and a plurality of steel frames arranged laterally core member and a steel laterally extending connecting to each other these steel with walls on both sides, is embedded in the soil cement, other of the steel The surface on the side facing the steel material and the surface inside the wall of the steel frame are provided with studs including a region located in the support layer .
本発明のソイルセメント構造は、ソイルセメント柱列壁により構成されたソイルセメント構造であって、前記ソイルセメント柱列壁の一部を上記のソイルセメント壁杭で構成してなることを特徴とする。The soil cement structure of the present invention is a soil cement structure constituted by a soil cement column wall, wherein a part of the soil cement column wall is constituted by the soil cement wall pile. .
上記のソイルセメント構造において、前記ソイルセメント壁杭は、ソイルセメント柱列壁に沿って適宜な間隔をおいて複数設けられていてもよい。In the soil cement structure described above, a plurality of the soil cement wall piles may be provided at appropriate intervals along the soil cement column wall.
ソイルセメント柱列壁に鉛直方向及び水平方向の支持力を向上させた壁杭部を設けることで、建物の外周近傍の基礎杭として機能させて、基礎杭の本数を減らすことができ、基礎杭の施工にかかっていたコストや施工期間を減らすことができる。 By providing a wall pile part with improved vertical and horizontal bearing capacity on the soil cement column wall, it can function as a foundation pile near the outer periphery of the building, reducing the number of foundation piles. The cost and construction period required for the construction can be reduced.
以下、本発明の一実施形態であるソイルセメント柱列壁について図面に基づき説明する。図１は、本実施形態のソイルセメント柱列壁の横断面図であり、図２は、ソイルセメント柱列壁の縦断面図であり、図３は、ソイルセメント柱列壁の配置図である。図１〜図３に示すように、本実施形態のソイルセメント柱列壁１０は建物２５の地下部分の外周を包囲している。 Hereinafter, a soil cement column wall which is an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view of a soil cement column wall according to the present embodiment, FIG. 2 is a vertical cross-sectional view of the soil cement column wall, and FIG. 3 is a layout diagram of the soil cement column wall. . As shown in FIGS. 1 to 3, the soil cement column wall 10 of the present embodiment surrounds the outer periphery of the underground portion of the building 25.
ソイルセメント柱列壁１０には適宜間隔をあけて壁杭部１５が設けられており、壁杭部１５はソイルセメント１１とソイルセメント１１に埋設された芯部材２１とで構成される。図４は、壁杭部１５の詳細構成を示す平面図である。同図に示すように、芯部材２１は、横方向に並べられた複数のＨ型鋼１２と、横方向に延び、これらのＨ型鋼１２を互いに連結する鋼板１３と、鋼板１３の内側の面（他方の鋼板１３と対向する側の面）に取付けられたスタッド１４とからなる。鋼板１３と複数のＨ型鋼１２とは、溶接又はボルト接合により一体に緊結されており、Ｈ型鋼１２及び鋼板１３にはソイルセメント柱列壁１０の中心に向かってスタッド１４が取付けられている。 A wall pile portion 15 is provided on the soil cement column wall 10 with an appropriate interval, and the wall pile portion 15 includes a soil cement 11 and a core member 21 embedded in the soil cement 11. FIG. 4 is a plan view showing a detailed configuration of the wall pile portion 15. As shown in the figure, the core member 21 includes a plurality of H-shaped steels 12 arranged in the lateral direction, a steel plate 13 extending in the lateral direction and connecting these H-shaped steels 12 to each other, and an inner surface of the steel plate 13 ( And a stud 14 attached to the other steel plate 13 on the side facing the other steel plate 13. The steel plate 13 and the plurality of H-shaped steels 12 are integrally bonded by welding or bolt joining, and a stud 14 is attached to the H-shaped steel 12 and the steel plate 13 toward the center of the soil cement column wall 10.
ソイルセメント１１は、普通強度のソイルセメント２０からなる部分と高強度ソイルセメント１９からなる部分とを含んでいる。高強度ソイルセメント１９は、普通強度のソイルセメント２０に比べて土砂１６に対するセメント量の割合を増加させることにより形成され、４［Ｎ／ｍｍ２］〜２０［Ｎ／ｍｍ２］程度の強度を有するソイルセメントである。壁杭部１５の下端付近の部分は高強度ソイルセメント１９により構成され、その他の部分は普通強度のソイルセメント２０により構成されている。 The soil cement 11 includes a portion made of ordinary strength soil cement 20 and a portion made of high strength soil cement 19. The high-strength soil cement 19 is formed by increasing the ratio of the cement amount with respect to the earth and sand 16 as compared with the normal-strength soil cement 20 and has a strength of about 4 [N / mm 2 ] to 20 [N / mm 2 ]. It is a soil cement. A portion near the lower end of the wall pile portion 15 is constituted by a high strength soil cement 19, and the other portion is constituted by a normal strength soil cement 20.
通常のソイルセメント柱列壁は、地盤を掘削することで発生した土砂と掘削機の先端から噴出されたセメントミルクを混合攪拌してソイルセメントを形成し、このソイルセメントが硬化する前に鉄骨を挿入することで構築される。本実施形態のソイルセメント柱列壁１０を構築する場合は、支持層２３に相当する部分の土砂１６を掘削しながら、掘削した土砂１６とセメントミルク１７とを混合攪拌する際に、セメント量を増加させることで、支持層２３に相当する部分のソイルセメント１１を高強度ソイルセメント１９とする。さらに、壁杭部１５に埋設される芯部材２１は、予め地上において、複数のＨ型鋼１２を鋼板１３により緊結し、Ｈ型鋼１２にスタッド１４を取付けた後、ソイルセメント１１に埋設すればよい。 A normal soil cement column wall is a mixture of the sand and sand generated by excavating the ground and the cement milk spouted from the tip of the excavator to form a soil cement. Before the soil cement hardens, Constructed by inserting. When the soil cement column wall 10 of the present embodiment is constructed, the amount of cement is adjusted when the excavated earth and sand 16 and the cement milk 17 are mixed and stirred while excavating the portion of the earth and sand 16 corresponding to the support layer 23. By increasing, the portion of the soil cement 11 corresponding to the support layer 23 becomes the high strength soil cement 19. Furthermore, the core member 21 embedded in the wall pile portion 15 may be embedded in the soil cement 11 after the plurality of H-shaped steels 12 are previously fastened on the ground with the steel plates 13 and the studs 14 are attached to the H-shaped steel 12. .
なお、ソイルセメント柱列壁１０の壁杭部１５以外の部分は、通常のソイルセメント柱列壁と同様に形成すればよい。また、ソイルセメント柱列壁１０の構築後に建物２５の地下構造を施工する際に、ソイルセメント柱列壁１０にシアコネクタ等を取付け、ソイルセメント柱列壁１０と建物２５の地下構造とを一体に構築するとよい。 In addition, what is necessary is just to form parts other than the wall pile part 15 of the soil cement column wall 10 similarly to a normal soil cement column wall. Further, when constructing the underground structure of the building 25 after the construction of the soil cement column wall 10, a shear connector or the like is attached to the soil cement column wall 10 so that the soil cement column wall 10 and the underground structure of the building 25 are integrated. It is good to build on.
上記の構成のソイルセメント柱列壁１０により、以下の効果が得られる。
建物２５とソイルセメント柱列壁１０が一体に構築されているため、建物２５の鉛直方向荷重及び建物２５に働く水平方向荷重はソイルセメント柱１０の壁杭部１５に伝えられる。壁杭部１５は複数のＨ型鋼１２を鋼板１３により一体に緊結されており、複数のＨ型鋼１２が一体となって水平方向荷重を負担するため、通常のソイルセメント柱列壁に比べ、水平方向耐力が向上する。また、壁杭部１５の下端付近のソイルセメント１１を高強度ソイルセメント１９としたため、ソイルセメント柱列壁１０はより強固に地盤に支持される。このため、ソイルセメント柱列壁１０は、建物２５から伝達された水平方向及び鉛直方向荷重により座屈や破壊されることなく、支持層２３に鉛直方向及び水平方向の双方の荷重を伝達することができ、建物２５を強固に支持することができる。このようにソイルセメント柱列壁１０の壁杭部１５は基礎杭と同様の機能を持っており、壁杭部１５を基礎杭の代わりとして用いることが可能である。
The soil cement column wall 10 configured as described above provides the following effects.
Since the building 25 and the soil cement column wall 10 are integrally constructed, the vertical load of the building 25 and the horizontal load acting on the building 25 are transmitted to the wall pile 15 of the soil cement column 10. In the wall pile portion 15, a plurality of H-shaped steels 12 are integrally fastened by a steel plate 13, and the plurality of H-shaped steels 12 are integrated to bear a horizontal load. Therefore, the wall pile 15 is horizontal compared to a normal soil cement column wall. Directional strength is improved. Moreover, since the soil cement 11 near the lower end of the wall pile 15 is the high-strength soil cement 19, the soil cement column wall 10 is more firmly supported by the ground. For this reason, the soil cement column wall 10 transmits both vertical and horizontal loads to the support layer 23 without being buckled or broken by the horizontal and vertical loads transmitted from the building 25. The building 25 can be firmly supported. Thus, the wall pile part 15 of the soil cement column wall 10 has the same function as the foundation pile, and the wall pile part 15 can be used as a substitute for the foundation pile.
そこで、建物２５周辺の基礎杭の代わりに用いたソイルセメント柱列壁１０と基礎杭とからなる基礎構造３０について説明する。図５（Ａ）は、通常の基礎杭３１のみからなる基礎構造における基礎杭３１の配置を比較のために示す平面図であり、図５（Ｂ）は本発明のソイルセメント柱列壁１０と基礎杭３１とからなる基礎構造３０の基礎杭３１の配置を示す平面図である。図５（Ａ）に示すように、基礎杭３１のみからなる基礎構造は、所定の間隔をあけて格子状に基礎杭３１を設けて構成される。しかし、図５（Ｂ）に示すように本発明のソイルセメント柱列壁１０及び基礎杭３１からなる基礎構造３０によれば、建物２５外周近傍の基礎杭３１の代わりに、壁杭部１５が水平方向及び鉛直方向荷重を負担することができるため、建物２５の外周の基礎杭３１を省略することが可能である。このため、外周近傍の基礎杭を構築する際に必要な費用を削減することができ、工期を短縮することができる。また、当然ながら、根切りを行う際は、ソイルセメント柱列壁１０を山留め壁として用い、ソイルセメント柱列壁１０の内部の掘削を行うことができる。そのため、仮設である山留め壁を再利用することができるため、工費を削減することが可能である。 Therefore, the foundation structure 30 composed of the soil cement column wall 10 and the foundation pile used instead of the foundation pile around the building 25 will be described. FIG. 5 (A) is a plan view showing, for comparison, the arrangement of the foundation piles 31 in a foundation structure composed of only ordinary foundation piles 31, and FIG. 5 (B) shows the soil cement column wall 10 of the present invention. It is a top view which shows arrangement | positioning of the foundation pile 31 of the foundation structure 30 which consists of the foundation pile 31. FIG. As shown to FIG. 5 (A), the foundation structure which consists only of the foundation pile 31 provides the foundation pile 31 in the grid | lattice form at predetermined intervals, and is comprised. However, according to the foundation structure 30 including the soil cement column wall 10 and the foundation pile 31 of the present invention as shown in FIG. Since the load in the horizontal direction and the vertical direction can be borne, the foundation pile 31 on the outer periphery of the building 25 can be omitted. For this reason, it is possible to reduce the cost required when constructing the foundation pile near the outer periphery, and to shorten the construction period. Of course, when performing root cutting, the soil cement column wall 10 can be used as a retaining wall to excavate the inside of the soil cement column wall 10. Therefore, since the mountain retaining wall which is temporary can be reused, the construction cost can be reduced.
なお、上記実施形態では、ソイルセメントとＨ型鋼及び鋼板とを一体化するため、スタッドを設ける構成としたが、これに限られず、ソイルセメントとＨ型鋼及び鋼板とが一体となればよい。 In addition, in the said embodiment, in order to integrate soil cement, H-shaped steel, and a steel plate, it was set as the structure which provides a stud, However, It is not restricted to this, What is necessary is just to integrate soil cement, H-shaped steel, and a steel plate.
１０ ソイルセメント柱列壁
１１ ソイルセメント
１２ Ｈ型鋼
１３ 鋼板
１４ スタッド
１５ 壁杭部
１６ 土砂
１７ セメントミルク
１８ セメント量の多いセメントミルク
１９ 高強度ソイルセメント
２０ 普通強度のソイルセメント
２１ 芯部材
２３ 支持層
２４ 軟弱層
２５ 建物
３０ 基礎構造
３１ 基礎杭
10 Soil cement column wall 11 Soil cement 12 H-shaped steel
13 Steel plate 14 Stud 15 Wall pile part 16 Earth and sand 17 Cement milk 18 Cement milk with a large amount of cement 19 High strength soil cement 20 Normal strength soil cement 21 Core member 23 Support layer 24 Soft layer 25 Building 30 Foundation structure 31 Foundation pile
Claims (3)
前記支持層内のソイルセメントが高強度ソイルセメントにより構成され、
横方向に並べた複数本の鉄骨と、これら鉄骨を壁面両側でお互いに連結する横方向に延びる鋼材とを備える芯部材が、ソイルセメント内に埋設され、
前記鋼材の他方の鋼材と対向する側の面、及び、前記鉄骨の壁内側の面には、前記支持層内に位置する領域を含めてスタッドが設けられていることを特徴とするソイルセメント壁杭。 A soil cement wall pile consisting of a soil cement column wall provided to reach the support layer in the ground of the building,
The soil cement in the support layer is composed of high strength soil cement,
And a plurality of steel frames arranged laterally have core member and a steel laterally extending connecting to each other these steel with walls on both sides, is embedded in the soil cement,
A soil cement wall characterized in that studs are provided on the surface of the steel material facing the other steel material and on the inner surface of the steel frame including a region located in the support layer. Pile.
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| JP2012136898A (en) * | 2010-12-27 | 2012-07-19 | Takenaka Komuten Co Ltd | Earth retaining wall |
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| CN106088102A (en) * | 2016-06-22 | 2016-11-09 | 南京工业大学 | Lattice combined steel plate pile cement-soil composite pile and construction method thereof |
| CN106703015A (en) * | 2016-12-30 | 2017-05-24 | 上海建工集团股份有限公司 | Steel plate concrete prefabricated part, permanent-temporary combined underground enclosure system and construction methods |
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| JP2012136898A (en) * | 2010-12-27 | 2012-07-19 | Takenaka Komuten Co Ltd | Earth retaining wall |
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