WO2023248354A1 - 地中埋設型構造物の補強方法 - Google Patents

地中埋設型構造物の補強方法 Download PDF

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Publication number
WO2023248354A1
WO2023248354A1 PCT/JP2022/024749 JP2022024749W WO2023248354A1 WO 2023248354 A1 WO2023248354 A1 WO 2023248354A1 JP 2022024749 W JP2022024749 W JP 2022024749W WO 2023248354 A1 WO2023248354 A1 WO 2023248354A1
Authority
WO
WIPO (PCT)
Prior art keywords
support member
underground structure
ground
underground
reinforcing
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.)
Ceased
Application number
PCT/JP2022/024749
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English (en)
French (fr)
Japanese (ja)
Inventor
亮 田中
潤一郎 玉松
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.)
NTT Inc
Original Assignee
Nippon Telegraph and Telephone 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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP2024528154A priority Critical patent/JPWO2023248354A1/ja
Priority to PCT/JP2022/024749 priority patent/WO2023248354A1/ja
Publication of WO2023248354A1 publication Critical patent/WO2023248354A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00—Independent underground or underwater structures; Retaining walls
    • E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
    • E02D29/05—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them at least part of the cross-section being constructed in an open excavation or from the ground surface, e.g. assembled in a trench
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00—Independent underground or underwater structures; Retaining walls
    • E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
    • E02D29/14—Covers for manholes or the like; Frames for covers
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F5/00—Sewerage structures
    • E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps

Definitions

  • the present disclosure relates to a method for reinforcing underground structures.
  • Patent Document 1 describes a method of drilling holes in each part of a concrete structure and inserting reinforcing members into the drilled holes.
  • Patent Documents 2 and 3 describe a method of excavating a side wall buried underground at multiple locations, constructing a formwork, and pouring concrete.
  • Patent Document 4 describes a method of excavating the entire side surface of a relatively large underground structure, building a formwork, and pouring concrete.
  • an object of the present disclosure is to provide a reinforcing method for reinforcing an underground structure to which a superstructure is attached in a short period of time.
  • a method for reinforcing an underground structure is a method for reinforcing an underground structure that is buried in the ground and has a superstructure attached thereto, the method comprising: 1 a removal step of removing the superstructure; an excavation step of excavating the ground above the side of the underground structure; and placing a support member above the side of the underground structure. and an attaching step of attaching a second superstructure onto the support member.
  • an underground structure to which an upper structure is attached can be reinforced in a short period of time.
  • FIG. 2 is a cross-sectional view showing a structure before reinforcement of an underground structure reinforced by a reinforcement method according to an embodiment of the present disclosure.
  • FIG. 2 is a cross-sectional view showing a reinforced structure of an underground structure reinforced by a reinforcement method according to an embodiment of the present disclosure.
  • FIG. 3 is a cross-sectional view showing a state after a removal step of the reinforcing method according to an embodiment of the present disclosure.
  • FIG. 3 is a cross-sectional view showing a state after an excavation step of the reinforcing method according to an embodiment of the present disclosure.
  • FIG. 3 is a cross-sectional view showing a state after an installation step of the reinforcing method according to an embodiment of the present disclosure.
  • 3 is a flowchart illustrating an example of a reinforcing method according to an embodiment of the present disclosure.
  • FIG. 1 is a sectional view of an underground structure 20 to which a superstructure 10 is attached.
  • the underground structure 20 is an underground structure before being reinforced by the reinforcement method according to an embodiment of the present disclosure.
  • the upper structure 10 and the underground structure 20 are buried in the ground 1000.
  • the upper structure 10 may include a lid 11, a receiving frame 12, a neck ring (building block) 13, and an anchor bolt 14.
  • the lid 11 may have a rectangular shape when viewed from above when attached to the underground structure 20.
  • the lid 11 may have a circular shape or another shape when viewed from above when attached to the underground structure 20.
  • a flange 11f may be formed on the outer edge of the lid 11.
  • the thickness of the flange 11f may be thinner than that of the portion of the lid 11 other than the flange 11f.
  • the thickness of the portion of the lid 11 other than the flange 11f may be thinner at the center and thicker toward the outside in the in-plane direction.
  • the lid 11 may be exposed to the ground surface.
  • the lid 11 may be made of iron.
  • the height h1 of the lid 11 may be, for example, 13 cm.
  • the receiving frame 12 may have a shape that receives the lid 11.
  • the receiving frame 12 may include a rectangular ring-shaped receiving part 12r that receives the lid 11, and a protruding part 12 1958 that projects from the receiving part 12r at the outer edge of the receiving frame 12.
  • the receiving frame 12 may be made of iron.
  • the neck ring (second support member) 13 may have a rectangular ring shape when viewed from above.
  • the upper structure (first upper structure) 10 may include two neck rings 13.
  • the number of neck rings 13 may be determined depending on the installation environment. Specifically, in a configuration in which the underground structure 20 is buried deep, the number of neck rings 13 may be increased.
  • the neck ring 13 may be constructed of concrete.
  • the height h2 of one neck ring 13 may be, for example, 7 cm.
  • the neck rings 13 may have different dimensions.
  • the anchor bolt 14 may be inserted through the receiving frame 12 and the two neck rings 13 to connect them.
  • Anchor bolt 14 may be constructed of iron.
  • a cap 15 may be attached to the anchor bolt 14.
  • the receiving frame 12 and neck ring 13 may be bonded together with mortar or the like.
  • the two neck rings 13 may be bonded together using an adhesive or the like.
  • the adhesive may be an epoxy resin adhesive.
  • the underground structure 20 may have a hollow rectangular parallelepiped shape.
  • the underground structure 20 may include a side wall 21 and a lower slab 22. Instead of these configurations, the underground structure 20 may have a cylindrical shape.
  • the underground structure 20 may have an opening 20 Kab at the top. Wiring and the like may pass through the inside of the underground structure 20.
  • the underground structure 20 may be a handhole.
  • the underground structure 20 is buried in the ground 1000.
  • the side wall 21 and the lower floor slab 22 may have a flat plate shape.
  • the top surface of the side wall 21 and the bottom surface of the upper structure 10 (for example, the neck ring 13) may be bonded with an adhesive or the like.
  • the thickness t of the side wall 21 and the thickness of the lower floor slab 22 are, for example, 10 cm.
  • the height h of the side wall 21 may be, for example, 60 cm to 185 cm.
  • FIG. 2 is a sectional view of the reinforced underground structure 120 to which the superstructure 110 (second superstructure) is attached.
  • a reinforced underground structure 120 may be formed by applying a reinforcing method according to an embodiment of the present disclosure to the underground structure 20 of FIG. 1 .
  • the same configuration as the superstructure 10 or the underground structure 20 will not be explained again, but a different configuration from the superstructure 10 or the underground structure 20 will be explained.
  • the dimensions of the lid 111 may be larger than the dimensions of the lid 11 in FIG.
  • the dimensions of the lid 111 viewed from above may be larger than the dimensions of the lid 11 in FIG.
  • the lid 111 may be the same member as the lid 11.
  • the dimensions of the receiving frame 112 may be larger than the dimensions of the receiving frame 12 in FIG.
  • the dimensions of the receiving frame 112 viewed from above may be larger than the dimensions of the receiving frame 12.
  • a receiving frame 112 having a width larger than that of the receiving frame 12 may be formed.
  • the cross-sectional shape of the receiving frame 112 may be such that the side surface is inclined outward with respect to the normal to the main surface.
  • the reinforced underground structure 120 does not need to include the neck ring 113.
  • the reinforced underground structure 120 further includes a support member (first support member) 123.
  • Support member 123 supports upper structure 110. Thereby, the support member 123 can reduce the load that the upper structure 110 applies to the side wall 21 of the reinforced underground structure 120.
  • the support member 123 may have a rectangular ring shape.
  • the superstructure 110 may be fixed onto the support member 123. Specifically, the bottom surface of the upper structure 110 may be bonded to the top surface of the support member 123 using an adhesive or the like.
  • the thickness ts2 of the support member 123 it is preferable to determine the thickness ts2 of the support member 123 so that the support member 123 does not sink to the ground 1000 due to the load that the support member 123 receives from the superstructure 110.
  • the pressure that the support member 123 applies to the ground 1000 can be dispersed.
  • the thickness ts2 may be larger than the thickness ts1 (see FIG. 1) of the neck ring (second support member) 13 of the upper structure 10.
  • the thickness ts2 may be, for example, twice or more the thickness ts1 of the neck ring 13.
  • the thickness here refers to wall thickness.
  • the thickness ts2 is, for example, 20 cm.
  • the height h' of the support member 123 may be equal to the sum of the heights of the one or more neck rings 13.
  • the height h' of the support member 123 may be, for example, 7 cm to 14 cm.
  • the support member 123 may be made of resin, concrete, mortar, or the like. Support member 123 may be constructed from a high strength or early strength material.
  • the superstructure 110 may rest on the support member 123.
  • the upper structure 110 may not rest on the side wall 21 but only on the support member 123.
  • the superstructure 110 may rest on the side wall 21 and on the support member 123.
  • the bottom surface of the upper structure 110 is not flat, and the top surface may rest on both the side wall 21 and the support member 123 with different depths.
  • FIG. 4 is a flowchart illustrating an example of a reinforcing method according to an embodiment of the present disclosure.
  • step S10 the upper structure 10 (see FIG. 1) is removed from the underground structure 20.
  • Structure 10 may be removed. More specifically, the upper structure 10 may be removed after the upper surface of the side wall 21 and the lowermost neck ring 13 have been separated. Drills, jackhammers, etc. may be used for separation.
  • the anchor bolt 14 may be removed from the receiving frame 12 and the two neck rings 13, and the receiving frame 12 and the two neck rings 13 may be separated before or after separation.
  • step S10 the ground 1000 on the sides of the superstructure 10 may be removed.
  • the underground structure 20 and the bottom surface of the upper structure 10 can be easily separated or removed, and the time required for step S20, which will be described later, can be shortened.
  • step S20 the ground 1000 above the side of the underground structure 20 is excavated.
  • the ground 1000 outside and above the four side walls 21 of the underground structure 20 has an excavation width w perpendicular to the side walls 21, and the installation depth of the support member 123 (from the surface of the ground 1000, in step S30 described later).
  • the depth) d may be excavated to the lower end of the supporting member 123 to be installed.
  • the average depth across the stepped surface 124, which will be described later, may be less than or equal to the installation depth d of the support member 123. Only the ground 1000 outside and above three or less side walls 21 of the underground structure 20 may be excavated.
  • the excavation width w may be equal to the thickness ts2 of the support member 123.
  • the ground 1000 having a width w into which the support member 123 can be inserted may be excavated.
  • the excavation width w may be wider (for example, by 5 cm) than the thickness ts1 of the support member 123.
  • the installation depth d may be equal to the depth of the top surface of the underground structure 20.
  • the ground 1000 may be excavated to the same depth as the top of the underground structure 20 (to the same depth as the top surface of the side wall 21).
  • the installation depth d may be, for example, 20 cm to 27 cm.
  • the reinforced underground structure 120 is The underground structure 20 can be reinforced in a shorter period of time while having sufficient strength.
  • a stepped portion 124 is formed in the ground 1000. Gravel may be laid on the stepped portion 124. The stepped portion 124 may be compacted using a rolling press or the like.
  • step S30 the support member 123 is placed above the side of the underground structure 20.
  • a rectangular ring-shaped support member 123 may be installed outside and above each of the four side walls 21 of the underground structure 20.
  • the support member 123 may be a pre-hardened concrete wall.
  • the support member 123 may be formed by solidifying concrete on the stepped portion 124.
  • step S40 the upper structure 110 is attached onto the support member 123.
  • the superstructure 110 may in particular be mounted on the support member 123 only. With this configuration, the load applied to the deteriorated underground structure 20 is further reduced. Therefore, a higher reinforcing effect can be obtained, and the safety of the reinforced underground structure 120 can be improved.
  • an adhesive may be applied onto the support member 123, and then the upper structure 110 may be placed on the support member 123. More specifically, mortar may be applied to the upper surface of the support member 123, and then the receiving frame 112 may be placed on the support member 123.
  • the anchor bolt 14 may be inserted into the receiving frame 112 and the supporting member 123 to connect the receiving frame 112 and the supporting member 123.
  • a lid 111 may be placed on the receiving frame 112.
  • ground 1000 may be refilled on the sides of the superstructure 110.
  • a method for reinforcing an underground structure buried in the ground and having a superstructure attached comprising: a removal step of removing the first superstructure from the underground structure; an excavation step of excavating the ground above the side of the underground structure; an installation step of arranging a support member above the side of the underground structure; attaching a second superstructure onto the support member;
  • the support member is a first support member
  • the first superstructure includes a second support member capable of contacting the underground structure,
  • the reinforcing method according to Supplementary Note 1 or 2 wherein the first support member is thicker than the second support member.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Paleontology (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Hydrology & Water Resources (AREA)
  • Health & Medical Sciences (AREA)
  • Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
PCT/JP2022/024749 2022-06-21 2022-06-21 地中埋設型構造物の補強方法 Ceased WO2023248354A1 (ja)

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JP2024528154A JPWO2023248354A1 (https=) 2022-06-21 2022-06-21
PCT/JP2022/024749 WO2023248354A1 (ja) 2022-06-21 2022-06-21 地中埋設型構造物の補強方法

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PCT/JP2022/024749 WO2023248354A1 (ja) 2022-06-21 2022-06-21 地中埋設型構造物の補強方法

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Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61116885U (https=) * 1984-12-28 1986-07-23
JPH026788U (https=) * 1988-06-24 1990-01-17
JPH09203064A (ja) * 1996-01-29 1997-08-05 Sekisui Chem Co Ltd 保護蓋台座
JPH10204905A (ja) * 1997-01-24 1998-08-04 Maezawa Kasei Ind Co Ltd 下水用点検口防護蓋装置
JPH1121931A (ja) * 1997-06-30 1999-01-26 Haneda Hume Pipe Co Ltd マンホールの免震構造
JPH11303192A (ja) * 1998-04-24 1999-11-02 Maezawa Kasei Ind Co Ltd 小型マンホール装置
JP2014074323A (ja) * 2012-10-05 2014-04-24 Tomotetsu Land:Kk マンホール鉄蓋補修リング及び補修工法
JP3198669U (ja) * 2015-04-09 2015-07-16 株式会社センタービレッジ マンホール更新構造及び新設のマンホール構造
JP2016199993A (ja) * 2016-03-29 2016-12-01 株式会社アイビルド マンホールの更新構造及び新設のマンホール構造
JP2017020316A (ja) * 2015-07-15 2017-01-26 株式会社クボタケミックス 汚水桝および仮設トイレシステム
JP2017197941A (ja) * 2016-04-26 2017-11-02 株式会社アイビルド マンホール更生工法及びマンホール更生構造
US20210214914A1 (en) * 2018-04-05 2021-07-15 Predl Systems North America Inc. Manhole Assembly
JP2022015796A (ja) * 2020-07-10 2022-01-21 株式会社アイビルド マンホール更生工法及びマンホール更生構造

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3445129B2 (ja) * 1997-12-01 2003-09-08 阪神高速道路公団 地中柱の耐震補強方法
JP4281567B2 (ja) * 2004-02-13 2009-06-17 株式会社大林組 既設橋脚基礎の補強構造および既設橋脚基礎の補強方法
JP5154850B2 (ja) * 2007-07-04 2013-02-27 オリエンタル白石株式会社 地中構造物の外部補強方法
JP7115923B2 (ja) * 2018-07-04 2022-08-09 鹿島建設株式会社 基礎構造補強方法及び基礎構造補強構造

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61116885U (https=) * 1984-12-28 1986-07-23
JPH026788U (https=) * 1988-06-24 1990-01-17
JPH09203064A (ja) * 1996-01-29 1997-08-05 Sekisui Chem Co Ltd 保護蓋台座
JPH10204905A (ja) * 1997-01-24 1998-08-04 Maezawa Kasei Ind Co Ltd 下水用点検口防護蓋装置
JPH1121931A (ja) * 1997-06-30 1999-01-26 Haneda Hume Pipe Co Ltd マンホールの免震構造
JPH11303192A (ja) * 1998-04-24 1999-11-02 Maezawa Kasei Ind Co Ltd 小型マンホール装置
JP2014074323A (ja) * 2012-10-05 2014-04-24 Tomotetsu Land:Kk マンホール鉄蓋補修リング及び補修工法
JP3198669U (ja) * 2015-04-09 2015-07-16 株式会社センタービレッジ マンホール更新構造及び新設のマンホール構造
JP2017020316A (ja) * 2015-07-15 2017-01-26 株式会社クボタケミックス 汚水桝および仮設トイレシステム
JP2016199993A (ja) * 2016-03-29 2016-12-01 株式会社アイビルド マンホールの更新構造及び新設のマンホール構造
JP2017197941A (ja) * 2016-04-26 2017-11-02 株式会社アイビルド マンホール更生工法及びマンホール更生構造
US20210214914A1 (en) * 2018-04-05 2021-07-15 Predl Systems North America Inc. Manhole Assembly
JP2022015796A (ja) * 2020-07-10 2022-01-21 株式会社アイビルド マンホール更生工法及びマンホール更生構造

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