EP0249654B1 - Shore strut assembly for supporting sheathing wall - Google Patents

Shore strut assembly for supporting sheathing wall Download PDF

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Publication number
EP0249654B1
EP0249654B1 EP86113979A EP86113979A EP0249654B1 EP 0249654 B1 EP0249654 B1 EP 0249654B1 EP 86113979 A EP86113979 A EP 86113979A EP 86113979 A EP86113979 A EP 86113979A EP 0249654 B1 EP0249654 B1 EP 0249654B1
Authority
EP
European Patent Office
Prior art keywords
shore strut
shore
block
strut assembly
blocks
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.)
Expired - Lifetime
Application number
EP86113979A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0249654A2 (en
EP0249654A3 (en
Inventor
Kyozo Uchida
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.)
Marukyo Komusho YK
Original Assignee
Marukyo Komusho YK
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 Marukyo Komusho YK filed Critical Marukyo Komusho YK
Publication of EP0249654A2 publication Critical patent/EP0249654A2/en
Publication of EP0249654A3 publication Critical patent/EP0249654A3/en
Application granted granted Critical
Publication of EP0249654B1 publication Critical patent/EP0249654B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • E02D17/00—Excavations; Bordering of excavations; Making embankments
    • E02D17/02—Foundation pits
    • E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00—Excavations; Bordering of excavations; Making embankments
    • E02D17/06—Foundation trenches ditches or narrow shafts
    • E02D17/08—Bordering or stiffening the sides of ditches trenches or narrow shafts for foundations

Definitions

  • This invention relates to a shore strut assembly for supporting a sheathing wall and more particularly to a shore strut assembly for supporting a sheathing wall that can be assembled and disassembled easily.
  • a plurality of sheet piles 11 are driven to predetermined depth into the ground in neighboring relation to one another. Then, after digging each sheet pile 11 into the ground to the extent that the sheet piles 11 are not tilted under the soil pressure, wales 12 for supporting the sheet piles 11 are attached to the sheet piles in a direction substantially at right angles with the driving direction of the sheet piles 11. Then, in order to prevent the sheet piles from tilting towards a pit 13 under the soil pressure, a shore strut 14 is installed between a pair of opposing wales 12, 12 mounted to the sheet piles 11 constituting opposing sheating wall sections 10, 10.
  • a jack 15 is attached to the shore strut 14 so that the shore strut 14 will be correctly mounted in position between the wales by the extension and retraction of the jack 15. It is noted that the jack 15 may be mounted between the wale 12 and the shore strut 14 or between the opposing shore struts 14, 14.
  • the jack 15 is extended by manually turning a handle 15a, the manual force of operations is sometimes insufficient to properly secure the shore strut 14 between the wales 12, 12 so that the shore strut 14 are likely to drop under small impact. Moreover, the shaft of the jack 15 is apt to be broken in case of elevated soil pressure.
  • the handle 15a is turned manually after the end of the predetermined construction operations and is gradually retracted the jack 15 for detaching the shore strut 14, it frequently occurs that the sheet piles 11 are inclined towards the pit 13 under the soil pressure such that the jack 15 is pinched between the wale 12 and the shore strut 14 or between the opposing shore struts so that it becomes impossible to detach the shore struts 14. In this case, it becomes necessary to dismount the jack 15 by striking it with a hammer or the like with considerable labor, while the expensive jack may be occasionally destroyed.
  • a shore strut assembly for supporting an excavation sheathing wall comprising a plurality of blocks each connected in series to form a parallelepiped as a whole, at least one of the blocks being fastened to one end of a shore strut for forming an extension of the shore strut and for receiving pressure acting on the sheathing wall together with the shore strut, at least one end face of one said block abutting against at least one end face of the adjacent said block at an angle inclined relative to a plane normal to a longitudinal axis of the shore strut and the strut assembly so that when disassembling the shore strut assembly after use, the one block can slide relative to the adjacent block along the in- dined abutting surfaces by the action of the pressure along the longitudinal axis of the shore strut and the shore strut assembly so as to be disengaged from the adjacent block.
  • FIG. 20 an embodiment of the shore strut assembly of the present invention is indicated generally by reference numeral 20.
  • the shore strut assembly 20 is made up of three blocks 21, 22 and 23 connected together in series. In the present embodiment, the blocks 21 to 23 are connected together by bolts/nuts 24.
  • one or more shore struts 14 of a predetermined length, H steel beams in the present example are selected as a function of the size of the pit 13, while the blocks 21 to 23 are selected from among a number of prefabricated blocks of various sizes so that these blocks when connected together in position will approximately fill the gap between the wale 12 and an end plate 14a welded to the end of the shore strut 14.
  • the end plate 14a and the blocks 21 to 23 may be previously connected together at the plant and transported to the site of construction for connecting the block 23 to the wale 12.
  • the block 21 may be previously connected at the plant to the end plate 14a of the shore strut 14 by bolts/nuts 24, similarly at the plant and the block 23 connected to the wale 12 at the site of construction.
  • the block 22 is finally introduced at the construction site between the blocks 21 and 23 and connected by bolts/nuts 24.
  • These bolts/nuts 24 are preferably employed for connecting the blocks, the end plate and the wale.
  • a bolt tightener may be used for tightening the bolts in situ.
  • the bolt tightener is provided with an end part for receiving the bolt and being rotated for tightening the bolt.
  • the shore strut assembly 20 is securely connected in position between the shore strut 14 and the wale 12 so that there is no risk of accidental dropping of the assembly 20.
  • the blocks 21 to 23 are shown in perspective so that the inner parts thereof can be seen through from outside.
  • the block 21 is a hollow block formed by an upper plate 21 a, a lower plate 21 b, a vertically extending lateral plate 21 having unnumbered through-holes for passage of tightening bolts, an inclined lateral plate 21 d having unnumbered through-holes for passage of tightening bolts, and an inner reinforcement plate 21 e.
  • the block 22 is identically constructed as the block 21 except that the vertically extending lateral plate 21c of the block 21 is replaced by an inclined lateral plate 22c so that the block 22 has two inclined lateral plates 22c, 22d.
  • the block 23 is also identically constructed as the block 21 except that the blocks are symmetrical relative to each other so that the block 23 is indicated by the same reference numerals as the block 21 and the redundant description is similarly omitted.
  • the blocks 21, 22 and 23 when connected together in series will form a parallelepiped as a whole, in the present embodiment, a right-angled parallelepiped, as the extension of the shore strut 14.
  • the shore strut assembly 20 and the strut 14 are acted upon by pressure from the sheathing wall 10 along the longitudinal axis x in order to prevent the sheet pile 11 from becoming tilted in the direction of the pit 13.
  • the inclined lateral plate 21d of the block 21 and the inclined lateral plate 22c of the block 22 abut to each other at an angle inclined relative to a plane y normal to the longitudinal axis x of the shore strut 14 and the shore strut assembly 20, while the inclined lateral plate 22d of the block 22 and the inclined lateral plate 23c of the block 23 abut to each other at an angle inclined relative to a plane z normal to the axis x.
  • a wire rope is attached to the shore strut 14 in order to hoist the shore strut 14 by a crane, not shown, so that the shore strut 14 will not drop by gravity during dismounting.
  • the shore strut assembly 20 is then disassembled.
  • the blocks 21, 22 are spot welded to each other along a seamline as at 25, while the blocks 22, 23 are also spot welded to each other along a seamline as at 26 in order to prevent the soil pressure from being applied to the bolts/nuts 24 while also preventing the block 22 from dropping by gravity during dismounting of the assembly 20.
  • the bolts/nuts 24 connecting the blocks 21, 22 to each other and the bolts/nuts 24 connecting the blocks 22, 23 to each other are then loosened, after which the upper surface of the block 22 is struck as with a hammer, not shown, for dismounting. Since the pressure acts on the inclined lateral plates 22c, 22d of the block 22 in a direction along the longitudinal axis x of the shore strut 14 and the shore strut assembly 20, as shown in Fig.4, the block 22 is slid under the operation of the pressure in accordance with the inclined angle such that the block 22 is instantly disengaged from the blocks 21, 23.
  • the blocks 21, 22 may be loosely connected by a rope 27, for example, in order to prevent the block 22 from dropping down.
  • the shore strut assembly 20 formed by the blocks 21, 22 and 23 may be connected between two shore struts 14, 14, as shown in Fig.5.
  • Fig.6 shows a shore strut assembly 60 which is modified from the shore strut assembly 20 shown in Figs. 2 to 5.
  • the assembly 20 is made up of two blocks 61, 62.
  • the block 61 is formed by an upper plate 61 a, a lower plate 61 b, an inclined lateral plate 61c, a vertically extending lateral plate 61 d and a central inner reinforcement plate 61 e, as in the case of the shore strut assembly 20 of Fig.3.
  • the inclined lateral plate 61 c is made up of two inclined sections 61 c1, 61 c2 and a step or shoulder 61 c3 interconnecting the inclined sections 61 c1 and 61 c2 with an offset along the longitudinal axis of the shore strut 14.
  • the block 61 is secured to the wale 12 by bolts/nuts 24.
  • the block 62 is connected to the shore strut 14 in a topsy-turvied relation to the block 61 and identically constructed as the block 61 so that redundant description is omitted for simplicity.
  • the shore strut 14 When mounting the shore strut assembly 60 in position, the shore strut 14 is set so that the step or shoulder 62c3 of the block 62 rests on the step or shoulder 61c3 of the block 61 as shown. A shim plate 63 is then driven into a space between the soil and the sheathing wall 10 for tilting the sheet pile 11 so as to abut the blocks 61, 62 to each other. Finally, the blocks 61, 62 are secured to one another by bolting.
  • the shore strut assembly 60 is convenient when performing a fine adjustment of the mounting distance.
  • the dismounting of the shore strut assembly 60 shown in Fig.6 is performed by the same sequence of operations as described with reference to Fig.2. In this case, the inclined lateral plate 61 of the block 61 is shifted relative to the inclined lateral plate 62c of the block 62, with the block 62 sliding in the direction of the arrow mark d.
  • Fig.7 shows a further different shore strut assembly 70 consisting of a combination of the blocks 61, 62 shown in Fig.6.
  • a left side block 62 is connected to the shore strut 14
  • a right side block 62 is connected to the wale 12
  • intermediate blocks 61, 61 are connected between the blocks 61, 61 with vertically extending lateral plates 61d, 61 d thereof in abutting relation to each other.
  • Fine adjustment of the mounting distance can be performed by the shim plate 63 and by taking advantage of the steps 61c3, 62c3.
  • the blocks 61, 61 can be detached as one from the blocks 62, 62.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • General Engineering & Computer Science (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Structural Engineering (AREA)
  • Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
  • Joining Of Building Structures In Genera (AREA)
  • Bridges Or Land Bridges (AREA)
  • Bulkheads Adapted To Foundation Construction (AREA)
  • Retaining Walls (AREA)
EP86113979A 1986-06-20 1986-10-09 Shore strut assembly for supporting sheathing wall Expired - Lifetime EP0249654B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP61142651A JPS63528A (ja) 1986-06-20 1986-06-20 切梁の支持・解体構造
JP142651/86 1986-06-20

Publications (3)

Publication Number Publication Date
EP0249654A2 EP0249654A2 (en) 1987-12-23
EP0249654A3 EP0249654A3 (en) 1988-05-25
EP0249654B1 true EP0249654B1 (en) 1990-02-21

Family

ID=15320316

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86113979A Expired - Lifetime EP0249654B1 (en) 1986-06-20 1986-10-09 Shore strut assembly for supporting sheathing wall

Country Status (5)

Country Link
EP (1) EP0249654B1 (ja)
JP (1) JPS63528A (ja)
KR (1) KR880000653A (ja)
CN (1) CN1004013B (ja)
DE (1) DE3669073D1 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111206592A (zh) * 2020-01-15 2020-05-29 天津大学 预制装配式钢混组合支撑的基坑支护结构的建造方法

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4917285A (en) * 1989-07-03 1990-04-17 Rockford Manufacturing Group, Inc. Dual capstan in-line wire drawing machine
HK1061156A2 (en) * 2004-04-01 2004-08-13 Hong Kong Fiberglass Technolog Shoring system for trenches
CN100368635C (zh) * 2005-10-17 2008-02-13 东南大学 基坑钢支撑压力变形及胀缩变形调节装置
CN100526566C (zh) * 2006-08-16 2009-08-12 上海电力设计院有限公司 深基坑开挖过程中利用时差效应控制基坑变形的方法
CN103437352A (zh) * 2013-09-04 2013-12-11 苏州罗兰机电设备有限公司 一种孔桩加固装置
CN104612166B (zh) * 2014-12-16 2016-06-29 同济大学 一种支护孔壁的组合支护装置及支护方法
CN106436718B (zh) * 2016-09-09 2018-11-09 中建三局集团有限公司 一种地铁基坑大跨度支撑体系及其施工方法
CN110004940A (zh) * 2019-04-28 2019-07-12 广州市设计院 支护结构及其施工方法
CN111997064A (zh) * 2020-08-27 2020-11-27 北京航天地基工程有限责任公司 一种岩土工程基坑支护结构
CN114673163B (zh) * 2022-03-01 2024-01-12 中国一冶集团有限公司 横撑安装装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1251242B (de) * 1967-09-28 Fa Friedrich Ischebech Ennepe tal-Altenvoerde Durch Schraubverstellung langenveranderbare dreiteilige Tiefbaustrebe
US2539703A (en) * 1948-06-02 1951-01-30 Sato Takeo Single locking wedge
DE3312603A1 (de) * 1982-04-15 1983-11-10 Heinrich Dipl.-Ing. 4030 Ratingen Schliephacke Mehrteiliges, zwischen schalungselementen angeordnetes zwischenstueck

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111206592A (zh) * 2020-01-15 2020-05-29 天津大学 预制装配式钢混组合支撑的基坑支护结构的建造方法

Also Published As

Publication number Publication date
KR880000653A (ko) 1988-03-28
CN86108374A (zh) 1987-12-30
CN1004013B (zh) 1989-04-26
EP0249654A2 (en) 1987-12-23
JPS63528A (ja) 1988-01-05
DE3669073D1 (de) 1990-03-29
EP0249654A3 (en) 1988-05-25

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