JP7048013B2 - Support structure of structure - Google Patents

Support structure of structure Download PDF

Info

Publication number
JP7048013B2
JP7048013B2 JP2017193657A JP2017193657A JP7048013B2 JP 7048013 B2 JP7048013 B2 JP 7048013B2 JP 2017193657 A JP2017193657 A JP 2017193657A JP 2017193657 A JP2017193657 A JP 2017193657A JP 7048013 B2 JP7048013 B2 JP 7048013B2
Authority
JP
Japan
Prior art keywords
ground improvement
ground
footing
shallow
improvement body
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.)
Active
Application number
JP2017193657A
Other languages
Japanese (ja)
Other versions
JP2019065629A (en
Inventor
崇宏 待永
章 西村
剛 本多
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.)
Takenaka Corp
Original Assignee
Takenaka 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 Takenaka Corp filed Critical Takenaka Corp
Priority to JP2017193657A priority Critical patent/JP7048013B2/en
Publication of JP2019065629A publication Critical patent/JP2019065629A/en
Application granted granted Critical
Publication of JP7048013B2 publication Critical patent/JP7048013B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Foundations (AREA)

Description

本発明は、構造物の支持構造に関する。 The present invention relates to a supporting structure of a structure.

液状化地盤等の軟弱な地盤の上に構造物を構築する場合、地盤に基礎杭を建込んで杭基礎とする方法、又は例えば特許文献１に示すように、構造物の直下地盤に地盤改良体を構築した上で直接基礎とする方法の、主に２つの方法が挙げられる。 When constructing a structure on soft ground such as liquefied ground, a method of building a foundation pile in the ground to make a pile foundation, or, for example, as shown in Patent Document 1, ground improvement on the ground directly under the structure. There are two main methods of building a body and directly using it as a basis.

特開２００１－１７３０８９号公報Japanese Unexamined Patent Publication No. 2001-173089

しかし、杭基礎とする場合、杭に発生する曲げモーメントを曲げ戻す基礎梁等を構造物に設ける必要があり、また、地盤の支持層に傾斜がある場合には杭長の調整が難しい。一方、特許文献１に示すように直接基礎とする場合、構造物の下部にブロック状の地盤改良体を構築するため、排出汚泥の量が多くなるとともに高コストとなる。 However, in the case of a pile foundation, it is necessary to provide a foundation beam or the like for bending back the bending moment generated in the pile in the structure, and it is difficult to adjust the pile length when the support layer of the ground is inclined. On the other hand, in the case of using a direct foundation as shown in Patent Document 1, since a block-shaped ground improvement body is constructed under the structure, the amount of discharged sludge increases and the cost increases.

本発明は上記事実に鑑み、排出汚泥の量及びコストを削減しつつ、液状化地盤の上に直接基礎で支持された構造物を構築することができる構造物の支持構造を提供することを目的とする。 In view of the above facts, it is an object of the present invention to provide a support structure for a structure capable of constructing a structure directly supported by a foundation on liquefied ground while reducing the amount and cost of discharged sludge. And.

第１態様に係る構造物の支持構造は、構造物の複数の柱をそれぞれ支持するフーチングと、前記フーチングの下部にそれぞれ独立して形成され、少なくとも液状化地盤層より下部まで延び、前記フーチングの直下地盤を囲うように配置された地盤改良体と、を有する。 The support structure of the structure according to the first aspect is formed independently of the footing that supports the plurality of pillars of the structure and the lower part of the footing, and extends at least below the liquefied ground layer to form the footing. It has a ground improvement body arranged so as to surround the direct base board.

上記構成によれば、構造物のフーチングの直下地盤を囲うように配置された地盤改良体が、フーチングの下部にそれぞれ独立して形成されている。このため、フーチングの直下地盤を地盤改良体でそれぞれ囲んで拘束することができ、液状化時の地盤沈下を抑制することができる。また、構造物又はフーチングの直下地盤全体に地盤改良体を配置する構成と比較して、コストを削減することができ、排出汚泥も削減することができる。 According to the above configuration, the ground improvement bodies arranged so as to surround the direct base plate of the footing of the structure are independently formed at the lower part of the footing. Therefore, it is possible to surround the footing's direct ground with the ground improvement body and restrain it, and it is possible to suppress the ground subsidence during liquefaction. In addition, the cost can be reduced and the discharged sludge can be reduced as compared with the configuration in which the ground improvement body is arranged on the entire direct base board of the structure or footing.

第２態様に係る構造物の支持構造は、第１態様に係る構造物の支持構造であって、前記地盤改良体で囲まれた前記直下地盤には、浅層地盤改良部が形成されている。 The support structure of the structure according to the second aspect is the support structure of the structure according to the first aspect, and a shallow ground improvement portion is formed in the direct ground ground surrounded by the ground improvement body. ..

上記構成によれば、地盤改良体で囲まれた直下地盤に浅層地盤改良部が形成されている。このため、浅層地盤改良された直下地盤を地盤改良体で囲んで拘束することにより、液状化時の地盤沈下をより抑制することができる。 According to the above configuration, a shallow ground improvement portion is formed on a direct ground ground surrounded by a ground improvement body. For this reason, it is possible to further suppress land subsidence during liquefaction by surrounding the direct ground with the improved shallow ground with the ground improvement body and restraining it.

第３態様に係る支持構造は、第１態様に係る構造物の支持構造であって、前記フーチングの周囲には、浅層地盤改良部が形成されており、前記浅層地盤改良部の下部に前記地盤改良体が配置されている。 The support structure according to the third aspect is the support structure of the structure according to the first aspect, and a shallow ground improvement portion is formed around the footing, and a shallow ground improvement portion is formed below the shallow ground improvement portion. The ground improvement body is arranged.

上記構成によれば、フーチングの周囲に浅層地盤改良部が形成されており、浅層地盤改良部の下部に地盤改良体が配置されている。このため、フーチングの周囲に浅層地盤改良部が形成されていない構成と比較して、液状化時の地盤沈下をより抑制することができる。 According to the above configuration, a shallow ground improvement portion is formed around the footing, and the ground improvement body is arranged below the shallow ground improvement portion. Therefore, the land subsidence at the time of liquefaction can be further suppressed as compared with the configuration in which the shallow ground improvement portion is not formed around the footing.

本発明によれば、排出汚泥の量及びコストを削減しつつ、液状化地盤の上に直接基礎で支持された構造物を構築することができる。 According to the present invention, it is possible to construct a structure directly supported by a foundation on liquefied ground while reducing the amount and cost of discharged sludge.

第１実施形態における構造物の支持構造を示す全体平面図である。It is an overall plan view which shows the support structure of the structure in 1st Embodiment. 図１におけるＡ－Ａ線断面図である。FIG. 3 is a cross-sectional view taken along the line AA in FIG. 第２実施形態における構造物の支持構造を示す、図２に相当する断面図である。It is sectional drawing corresponding to FIG. 2 which shows the support structure of the structure in 2nd Embodiment. 変形例における構造物の支持構造を示す、図２に相当する断面図である。It is sectional drawing corresponding to FIG. 2 which shows the support structure of the structure in the modification. 変形例における構造物の支持構造を示す部分平面図である。It is a partial plan view which shows the support structure of a structure in a modification.

＜第１実施形態＞
以下、本発明の第１実施形態における構造物の支持構造について、図１及び図２を用いて説明する。 <First Embodiment>
Hereinafter, the support structure of the structure according to the first embodiment of the present invention will be described with reference to FIGS. 1 and 2.

（構造）
図１、図２に示すように、本実施形態の構造物１０は、一例として液状化地盤層２２を有する液状化地盤上に構築された大型の建物であり、複数の柱１２を有している。柱１２は、例えば鉄骨造とされており、下部がフーチング１４によってそれぞれ支持されている。 (Construction)
As shown in FIGS. 1 and 2, the structure 10 of the present embodiment is a large-scale building constructed on the liquefied ground having the liquefied ground layer 22 as an example, and has a plurality of pillars 12. There is. The pillar 12 is made of, for example, a steel frame, and the lower portion thereof is supported by the footing 14.

フーチング１４は、外寸が柱１２の外寸より大きい平面視で四角形状のコンクリート基礎であり、図２に示すように、柱１２の下端部に接合されたベースプレート１６がアンカーボルト１８によってフーチング１４の上部にそれぞれ固定されている。 The footing 14 is a concrete foundation having a rectangular shape in a plan view whose outer dimensions are larger than the outer dimensions of the pillar 12, and as shown in FIG. 2, the base plate 16 joined to the lower end of the pillar 12 is footed 14 by anchor bolts 18. It is fixed to the top of each.

また、複数のフーチング１４の下部には、地盤改良体２０がそれぞれ設けられている。地盤改良体２０は、深層混合処理工法やソイルミキシングウォール工法等によって造成された水密構造の柱列であり、地盤改良体２０の下部は液状化地盤層２２の下部の支持層２４まで延びている。なお、地盤改良体２０の下部は少なくとも液状化地盤層２２より下部まで延びていればよい。 Further, a ground improvement body 20 is provided below each of the plurality of footings 14. The ground improvement body 20 is a column of watertight structures created by a deep mixing treatment method, a soil mixing wall method, or the like, and the lower portion of the ground improvement body 20 extends to the support layer 24 below the liquefied ground layer 22. .. The lower part of the ground improvement body 20 may extend at least below the liquefied ground layer 22.

複数の地盤改良体２０は、フーチング１４毎にそれぞれ独立して形成されており、フーチング１４の直下地盤２６を囲うように配置されている。具体的には、本実施形態では、地盤改良体２０は平面視で口の字型に配置されており、内寸がフーチング１４の外寸より小さく、外寸がフーチング１４の外寸より大きくされていることにより、平面視でフーチング１４と一部がラップしている。 The plurality of ground improvement bodies 20 are independently formed for each footing 14, and are arranged so as to surround the direct base board 26 of the footing 14. Specifically, in the present embodiment, the ground improvement body 20 is arranged in the shape of a mouth in a plan view, the inner dimension is smaller than the outer dimension of the footing 14, and the outer dimension is larger than the outer dimension of the footing 14. As a result, the footing 14 and a part of the footing 14 are partially wrapped in a plan view.

さらに、フーチング１４の直下地盤２６における地盤改良体２０で囲われた部分には、浅層地盤改良部２８が形成されている。浅層地盤改良部２８は、浅層地盤改良工法やエスミックスラリー工法等によって造成された水密構造の層であり、フーチング１４の下部から３ｍ以内程度の浅層部分に設けられている。 Further, a shallow ground improvement portion 28 is formed in a portion of the direct base board 26 of the footing 14 surrounded by the ground improvement body 20. The shallow ground improvement portion 28 is a layer having a watertight structure created by a shallow ground improvement method, an esmic slurry method, or the like, and is provided in a shallow portion within about 3 m from the lower part of the footing 14.

（施工方法）
構造物１０を地盤改良体２０で支持する場合、まず、オーガ等の図示しない杭打ち機によって、一部がラップして連続する複数の円柱状の地盤改良柱を直下地盤２６に形成する。 (Construction method)
When the structure 10 is supported by the ground improvement body 20, first, a plurality of columnar ground improvement columns partially wrapped and continuous are formed on the direct base board 26 by a pile driver (not shown) such as an auger.

地盤改良柱は、直下地盤２６の掘削土にセメントミルク等の安定剤を注入し、混合、攪拌したものであり、複数の地盤改良柱によって平面視で口の字型とされた柱列状の地盤改良体２０が形成される。 The ground improvement pillars are formed by injecting a stabilizer such as cement milk into the excavated soil of the direct foundation board 26, mixing and stirring the pillars, and the pillars are shaped like a mouth in a plan view by a plurality of ground improvement pillars. The ground improvement body 20 is formed.

次に、フーチング１４を形成するための根切り面まで、直下地盤２６の浅層部分を掘削する。そして、直下地盤２６における地盤改良体２０で囲われた部分の上部にセメント等の安定材を粉体状態又は混練状態で散布し、ユンボ等の施工機により攪拌、混合して締固めることにより、浅層地盤改良部２８を形成する。 Next, a shallow portion of the straight base board 26 is excavated up to the root cutting surface for forming the footing 14. Then, a stabilizer such as cement is sprayed on the upper part of the direct base plate 26 surrounded by the ground improvement body 20 in a powder state or a kneaded state, and the mixture is stirred, mixed and compacted by a construction machine such as Yumbo. The shallow ground improvement portion 28 is formed.

その後、地盤改良体２０及び浅層地盤改良部２８の上部にコンクリートを打設してフーチング１４を形成する。なお、フーチング１４は地盤改良体２０の上端部に直接載置してもよく、敷き砂や捨てコンを介して載置してもよい。フーチング１４を地盤改良体２０の上端部に直接載置する場合には、施工誤差を吸収するためにフーチング１４の下部に打増しを設けておくとよい。 After that, concrete is cast on the upper part of the ground improvement body 20 and the shallow ground improvement portion 28 to form the footing 14. The footing 14 may be placed directly on the upper end portion of the ground improvement body 20, or may be placed via paving sand or a waste container. When the footing 14 is placed directly on the upper end portion of the ground improvement body 20, it is preferable to provide an additional shot at the lower part of the footing 14 in order to absorb construction errors.

その後、フーチング１４を埋め戻してフーチング１４の上部に露出するアンカーボルト１８を柱１２の下端部に接合されたベースプレート１６の孔に挿入し、アンカーボルト１８にナット３０を螺合することで、フーチング１４に構造物１０の柱１２を固定する。 After that, the footing 14 is backfilled and the anchor bolt 18 exposed at the upper part of the footing 14 is inserted into the hole of the base plate 16 joined to the lower end of the pillar 12, and the nut 30 is screwed into the anchor bolt 18 to perform the footing. The pillar 12 of the structure 10 is fixed to 14.

そして、液状化地盤上に土間コンクリート３２を打設し、構造物１０のその他の図示しないスラブや梁等を施工して構造物１０を構築する。なお、上記工程は一例であり、他の工程が含まれていたり、施工順が異なっていたりしても構わない。 Then, the soil concrete 32 is placed on the liquefied ground, and other slabs, beams, etc. (not shown) of the structure 10 are constructed to construct the structure 10. The above process is an example, and other processes may be included or the construction order may be different.

（作用及び効果）
本実施形態によれば、構造物１０の柱１２を支持するフーチング１４の下部に、フーチング１４の直下地盤２６を囲うように配置された地盤改良体２０がそれぞれ独立して形成されている。 (Action and effect)
According to the present embodiment, the ground improvement bodies 20 arranged so as to surround the direct base plate 26 of the footing 14 are independently formed below the footing 14 that supports the pillar 12 of the structure 10.

このため、フーチング１４の直下地盤２６を地盤改良体２０でそれぞれ囲んで拘束することができ、液状化時の地盤沈下を抑制することができる。また、構造物１０の下部全体又はフーチング１４の直下地盤２６全体に地盤改良体２０を配置する構成と比較して、コストを削減することができ、排出汚泥も削減することができる。 Therefore, the direct base plate 26 of the footing 14 can be surrounded by the ground improvement body 20 and restrained, and the ground subsidence at the time of liquefaction can be suppressed. Further, the cost can be reduced and the discharged sludge can be reduced as compared with the configuration in which the ground improvement body 20 is arranged on the entire lower portion of the structure 10 or the entire direct base plate 26 of the footing 14.

また、本実施形態によれば、フーチング１４の直下地盤２６における地盤改良体２０で囲われた部分に、浅層地盤改良部２８が形成されている。このため、浅層地盤改良された直下地盤２６を地盤改良体２０で囲んで拘束することができ、液状化時の地盤沈下をより抑制することができる。 Further, according to the present embodiment, the shallow ground improvement portion 28 is formed in the portion of the direct base board 26 of the footing 14 surrounded by the ground improvement body 20. Therefore, the direct ground ground 26 with the shallow ground improvement can be surrounded by the ground improvement body 20 and restrained, and the ground subsidence at the time of liquefaction can be further suppressed.

また、浅層地盤改良工法は、深層混合処理工法やソイルミキシングウォール工法等と比較して、オーガ等の大型の杭打ち機を必要としないため、地盤改良体２０で囲われた部分にも地盤改良体２０を形成する構成と比較して、施工が容易となるとともにコストを削減することができる。 In addition, the shallow ground improvement method does not require a large pile driver such as an auger compared to the deep mixing method, soil mixing wall method, etc., so the ground is also included in the part surrounded by the ground improvement body 20. Compared with the configuration for forming the improved body 20, the construction can be facilitated and the cost can be reduced.

さらに、本実施形態によれば、地盤改良体２０は、平面視でフーチング１４と一部がラップしており、下部が液状化地盤層２２の下部まで延びて支持層２４に定着している。このため、フーチング１４を地盤改良体２０で直接支持することができるとともに、地盤改良体２０の支持力を高めることができる。 Further, according to the present embodiment, the ground improvement body 20 partially wraps with the footing 14 in a plan view, and the lower portion extends to the lower portion of the liquefied ground layer 22 and is fixed to the support layer 24. Therefore, the footing 14 can be directly supported by the ground improvement body 20, and the supporting force of the ground improvement body 20 can be increased.

＜第２実施形態＞
次に、本発明の第２実施形態における構造物の支持構造について、図３を用いて説明する。なお、第１実施形態と同様の構成については、図示及び説明を省略する。 <Second Embodiment>
Next, the support structure of the structure in the second embodiment of the present invention will be described with reference to FIG. The illustration and description of the same configuration as that of the first embodiment will be omitted.

図３に示すように、本実施形態では、図示しない構造物の柱４２を支持するフーチング４４の周囲に、浅層地盤改良部４６が形成されている。浅層地盤改良部４６は、第１実施形態の浅層地盤改良部２８と同様の水密構造の層であり、フーチング４４の周囲における液状化地盤層４８の浅層部分に設けられている。 As shown in FIG. 3, in the present embodiment, a shallow ground improvement portion 46 is formed around a footing 44 that supports a pillar 42 of a structure (not shown). The shallow ground improvement portion 46 is a layer having a watertight structure similar to that of the shallow ground improvement portion 28 of the first embodiment, and is provided in the shallow portion of the liquefied ground layer 48 around the footing 44.

また、浅層地盤改良部４６の下部には、地盤改良体５０が配置されている。地盤改良体５０は、第１実施形態の地盤改良体２０と同様の水密構造の柱列であり、下部が液状化地盤層４８の下部の支持層５２まで延びている。また、地盤改良体５０は、フーチング４４の直下地盤５４を囲うように平面視で口の字型に配置されており、平面視でフーチング４４と一部がラップしている。 Further, a ground improvement body 50 is arranged below the shallow ground improvement portion 46. The ground improvement body 50 is a column column having the same watertight structure as the ground improvement body 20 of the first embodiment, and the lower portion extends to the lower support layer 52 of the liquefied ground layer 48. Further, the ground improvement body 50 is arranged in a mouth shape in a plan view so as to surround the direct base board 54 of the footing 44, and a part of the ground improvement body 50 wraps with the footing 44 in a plan view.

（施工方法）
構造物の柱４２を地盤改良体５０で支持する場合、まず、第１実施形態と同様に、オーガ等の図示しない杭打ち機によって直下地盤５４に柱列状の地盤改良体５０を形成する。 (Construction method)
When the pillar 42 of the structure is supported by the ground improvement body 50, first, as in the first embodiment, the pillar row-shaped ground improvement body 50 is formed on the straight base board 54 by a pile driver (not shown) such as an auger.

次に、フーチング４４の周囲における液状化地盤層４８の浅層部分を根切りして、直下地盤５４における地盤改良体５０の上部に浅層地盤改良部４６の一部を形成する。そして、地盤改良体５０の上部に形成した浅層地盤改良部４６の上部にコンクリートを打設してフーチング４４を形成する。 Next, the shallow portion of the liquefied ground layer 48 around the footing 44 is rooted to form a part of the shallow ground improvement portion 46 on the upper part of the ground improvement body 50 in the direct ground ground 54. Then, concrete is cast on the upper part of the shallow ground improvement portion 46 formed on the upper part of the ground improvement body 50 to form the footing 44.

その後、フーチング４４を埋め戻してフーチング４４の周囲に浅層地盤改良部４６の残りの部分を形成し、フーチング４４に柱４２を固定するとともに浅層地盤改良部４６上に土間コンクリート５６及びその他の図示しないスラブや梁等を施工する。 After that, the footing 44 is backfilled to form the remaining part of the shallow ground improvement portion 46 around the footing 44, the pillar 42 is fixed to the footing 44, and the soil concrete 56 and other parts are formed on the shallow ground improvement portion 46. Install slabs and beams (not shown).

（作用及び効果）
本実施形態によれば、フーチング４４の周囲に浅層地盤改良部４６が形成されている。このため、浅層地盤改良部４６によってフーチング４４を支持することができ、フーチング４４の周囲に浅層地盤改良部４６が形成されていない構成と比較して、液状化時の地盤沈下を抑制することができる。 (Action and effect)
According to the present embodiment, a shallow ground improvement portion 46 is formed around the footing 44. Therefore, the footing 44 can be supported by the shallow ground improvement portion 46, and the ground subsidence during liquefaction is suppressed as compared with the configuration in which the shallow ground improvement portion 46 is not formed around the footing 44. be able to.

また、浅層地盤改良部４６の下部に、フーチング４４の直下地盤５４を囲うように配置された地盤改良体５０が形成されている。このため、浅層地盤改良部４６を地盤改良体５０で支持するとともに、フーチング４４の直下地盤５４を地盤改良体５０で囲んで拘束することができ、液状化時の地盤沈下をより抑制することができる。 Further, a ground improvement body 50 arranged so as to surround the direct ground ground 54 of the footing 44 is formed below the shallow ground improvement portion 46. Therefore, the shallow ground improvement portion 46 can be supported by the ground improvement body 50, and the direct ground ground 54 of the footing 44 can be surrounded by the ground improvement body 50 and restrained, further suppressing the ground subsidence during liquefaction. Can be done.

＜その他の実施形態＞
以上、本発明について第１、第２実施形態を説明したが、本発明はかかる実施形態に限定されるものではなく、本発明の範囲内にて他の種々の実施形態が可能である。 <Other embodiments>
Although the first and second embodiments of the present invention have been described above, the present invention is not limited to such embodiments, and various other embodiments are possible within the scope of the present invention.

例えば、第１実施形態では、直下地盤２６における地盤改良体２０で囲われた部分に浅層地盤改良部２８が形成されていたが、図４に示すように、直下地盤６０に浅層地盤改良部２８を形成しない構成としてもよい。 For example, in the first embodiment, the shallow ground improvement portion 28 is formed in the portion of the straight base board 26 surrounded by the ground improvement body 20, but as shown in FIG. 4, the shallow ground improvement portion 28 is formed in the straight base board 60. The structure may be such that the portion 28 is not formed.

浅層地盤改良部２８を形成しなくとも、直下地盤６０を地盤改良体６２で囲んで拘束することで液状化時の地盤沈下を抑制することができる。なお、浅層地盤改良部２８の代わりに、図４に仮想線で示すように、下部が支持層６４に達する杭６６によってフーチング６８を支持する構成としてもよい。 Even if the shallow ground improvement portion 28 is not formed, the ground subsidence at the time of liquefaction can be suppressed by surrounding the direct ground ground 60 with the ground improvement body 62 and restraining it. Instead of the shallow ground improvement portion 28, the footing 68 may be supported by a pile 66 whose lower portion reaches the support layer 64, as shown by a virtual line in FIG.

また、第１、第２実施形態では、地盤改良体２０、５０の一部が平面視でフーチング１４、４４とラップする構成とされていた。しかし、図４に示すように、地盤改良体６２が平面視でフーチング６８とラップせず、フーチング６８の外側に位置する構成とされていてもよい。 Further, in the first and second embodiments, a part of the ground improvement bodies 20 and 50 is configured to wrap with the footings 14 and 44 in a plan view. However, as shown in FIG. 4, the ground improvement body 62 may be configured to be located outside the footing 68 without wrapping with the footing 68 in a plan view.

地盤改良体６２とフーチング６８とがラップしなくとも、フーチング６８の直下地盤６０を地盤改良体６２によって囲んで拘束することで、液状化時の地盤沈下を抑制することができる。 Even if the ground improvement body 62 and the footing 68 do not wrap, the ground subsidence at the time of liquefaction can be suppressed by surrounding and restraining the direct base board 60 of the footing 68 by the ground improvement body 62.

さらに、第１、第２実施形態では、地盤改良体２０、５０が平面視で口の字型に配置されていた。しかし、地盤改良体２０、５０は、フーチング１４、４４の直下地盤２６、５４を囲むことができる形状とされていればよく、例えば図５に示す地盤改良体７０のように、平面視で田の字型とされていてもよい。その他、平面視で日の字型等とされていてもよい。 Further, in the first and second embodiments, the ground improvement bodies 20 and 50 are arranged in a mouth shape in a plan view. However, the ground improvement bodies 20 and 50 may be shaped so as to be able to surround the direct base boards 26 and 54 of the footings 14 and 44, for example, like the ground improvement body 70 shown in FIG. It may be in the shape of a. In addition, it may be in the shape of a day in a plan view.

１０ 構造物
１２、４２ 柱
１４、４４、６８ フーチング
２０、５０、６２、７０ 地盤改良体
２２、４８ 液状化地盤層
２６、５４、６０ 直下地盤
２８、４６ 浅層地盤改良部 10 Structure 12, 42 Pillar 14, 44, 68 Footing 20, 50, 62, 70 Ground improvement body 22, 48 Liquefied ground layer 26, 54, 60 Direct ground ground 28, 46 Shallow ground improvement part

Claims (1)

構造物の複数の柱をそれぞれ支持する複数のフーチングと、
複数の前記フーチングの下部にそれぞれ独立して形成され、少なくとも液状化地盤層より下部まで延び、前記フーチングの直下地盤を囲うように配置された複数の地盤改良体と、
を有し、
平面視にて、前記フーチングと前記地盤改良体の一部とがラップし、
前記地盤改良体で囲まれた前記直下地盤には、浅層地盤改良部が形成されている、
構造物の支持構造。 Multiple footings that support multiple pillars of the structure, and
A plurality of ground improvement bodies formed independently under each of the plurality of footings, extending at least below the liquefied ground layer, and arranged so as to surround the direct ground surface of the footings.
Have ,
In a plan view, the footing and a part of the ground improvement body wrap,
A shallow ground improvement portion is formed on the direct ground ground surrounded by the ground improvement body.
Support structure of the structure.
JP2017193657A 2017-10-03 2017-10-03 Support structure of structure Active JP7048013B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2017193657A JP7048013B2 (en) 2017-10-03 2017-10-03 Support structure of structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2017193657A JP7048013B2 (en) 2017-10-03 2017-10-03 Support structure of structure

Publications (2)

Publication Number Publication Date
JP2019065629A JP2019065629A (en) 2019-04-25
JP7048013B2 true JP7048013B2 (en) 2022-04-05

Family

ID=66340359

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2017193657A Active JP7048013B2 (en) 2017-10-03 2017-10-03 Support structure of structure

Country Status (1)

Country Link
JP (1) JP7048013B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7359515B2 (en) * 2019-09-20 2023-10-11 株式会社竹中土木 Liquefaction countermeasure structure for underground structures

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001173089A (en) 1999-12-15 2001-06-26 Shimizu Corp Support structure of construction
JP2002030649A (en) 2000-07-19 2002-01-31 Nishimatsu Constr Co Ltd Construction method for improving foundation subsoil
JP2005105602A (en) 2003-09-29 2005-04-21 Shimizu Corp Counter measure structure for liquefaction
JP2007023645A (en) 2005-07-19 2007-02-01 Railway Technical Res Inst Foundation structure and method of constructing the same
JP2015168944A (en) 2014-03-05 2015-09-28 株式会社竹中工務店 Foundation structure of building
US20160265184A1 (en) 2015-03-12 2016-09-15 Ingios Geotechnics, Inc. Soil improvement foundation isolation and load spreading systems and methods

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0713372B2 (en) * 1989-02-14 1995-02-15 鹿島建設株式会社 Construction method of structure foundation in sandy soil layer
JPH1018310A (en) * 1996-07-02 1998-01-20 Tokyu Constr Co Ltd Earthquake resistant reinforcement for structure

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001173089A (en) 1999-12-15 2001-06-26 Shimizu Corp Support structure of construction
JP2002030649A (en) 2000-07-19 2002-01-31 Nishimatsu Constr Co Ltd Construction method for improving foundation subsoil
JP2005105602A (en) 2003-09-29 2005-04-21 Shimizu Corp Counter measure structure for liquefaction
JP2007023645A (en) 2005-07-19 2007-02-01 Railway Technical Res Inst Foundation structure and method of constructing the same
JP2015168944A (en) 2014-03-05 2015-09-28 株式会社竹中工務店 Foundation structure of building
US20160265184A1 (en) 2015-03-12 2016-09-15 Ingios Geotechnics, Inc. Soil improvement foundation isolation and load spreading systems and methods

Also Published As

Publication number Publication date
JP2019065629A (en) 2019-04-25

Similar Documents

Publication Publication Date Title
JP7009773B2 (en) Building construction method and building structure
JP2003064657A (en) Construction method for improving soft ground
JP7048013B2 (en) Support structure of structure
US10280583B2 (en) Multi-web counterfort wall system
JP7101407B2 (en) On-site placement reinforcement top type pile foundation and its construction method
JPH11336335A (en) Rebuilding method for building
JP6126939B2 (en) Reconstruction method for new buildings and new buildings
JP7386095B2 (en) Underground structure construction method
CN105970969B (en) A kind of base pit engineering assembled cushion layer structure and its application process
JP2015200177A (en) Formation method of building foundation and temporary support metal fitting
JP7085464B2 (en) How to build a retaining wall structure in the reverse striking method
JP2011132689A (en) Structure of earth retaining wall serving also as footing and construction method of the same
US10337164B2 (en) Threadbar connections for wall systems
US10400418B2 (en) Combined counterfort retaining wall and mechanically stabilized earth wall
JP2020197015A (en) Construction method of foundation
JP4699831B2 (en) Pile foundation reinforcement structure
JP2014051852A (en) Ground improvement structure
JP4176235B2 (en) Liquefaction prevention method
CN107060136A (en) A kind of loam wall building block external corner anti-seismic structure and its construction technology
JP7008663B2 (en) Column pile rotation suppression structure
JP2000257088A (en) Earth retaining wall and its construction method
JP2003082691A (en) Execution method for underground structural skeleton
JP2006077447A (en) Foundation structure of construction
JP2020159006A (en) Retaining wall and its construction method
JP2010121372A (en) Structure of newly-built structure using existing pile and existing foundation, and method for constructing the newly-built structure using existing pile and existing foundation

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20200924

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20210721

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20210803

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20210929

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20211109

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20220120

C60 Trial request (containing other claim documents, opposition documents)

Free format text: JAPANESE INTERMEDIATE CODE: C60

Effective date: 20220120

A911 Transfer to examiner for re-examination before appeal (zenchi)

Free format text: JAPANESE INTERMEDIATE CODE: A911

Effective date: 20220201

C21 Notice of transfer of a case for reconsideration by examiners before appeal proceedings

Free format text: JAPANESE INTERMEDIATE CODE: C21

Effective date: 20220208

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: 20220222

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20220311

R150 Certificate of patent or registration of utility model

Ref document number: 7048013

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150