JPS63165700A - Method of sheathing construction of drive construction - Google Patents

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 この発明は下水管、上水管等の地下埋設工事等で行なわ
れる開削工事の土留工法に関する。[Detailed Description of the Invention] [Industrial Application Field] This invention relates to an earth retaining method for excavation work carried out in underground construction work for sewer pipes, water pipes, etc.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

上・下水管等を埋設するために開削した溝の切取面は土
砂の崩壊を防ぎ、その面をおおむね鉛直に保つために通
常、矢板を建込み、これを切ばりを支点とする腹起を添
付けて支持していた。To prevent earth and sand from collapsing and to keep the cut surface of a trench excavated for burying water and sewer pipes, etc., to keep the surface roughly vertical, sheet piles are usually erected, and this is used to raise the slope using the cut beam as a fulcrum. I attached it and supported it.

下水管等を埋設する場合は、地盤の開削、下水管の搬入
、据付け、土砂の埋戻しを繰返して施工される。通常、
下水管を埋設するための開削溝は深さ２．５〜４．５ｍ
、幅１．０〜２．０ｍ程度であり、土留鋼矢板あるいは
木矢板を建込み、多くの場合上下２段の腹起で支持する
必要があり、その解体組立により少なからぬ労力を必要
とした。When burying sewage pipes, etc., the construction process involves repeatedly excavating the ground, transporting the sewage pipes, installing them, and backfilling with earth and sand. usually,
The depth of the excavated trench for burying the sewer pipe is 2.5 to 4.5 m.
They were approximately 1.0 to 2.0 m wide, and were constructed with earth-retaining steel sheet piles or wooden sheet piles, and in many cases needed to be supported with two upper and lower tiers of uprights, which required considerable labor to dismantle and reassemble. .

上記の事情に鑑み、本願発明者は、さきに特開開６１−
１７６４１号において、下水管理設工事等に伴なう開削
工事で用いる腹起の繁雑な作業を省力化できる自走腹起
装置を提案した。この発明の目的は、上記の自走腹起を
用い腹起作業の省力化とともに、矢板の建込の作業性を
高めた作業能率が極めて高い開削工事の土留工法を提案
するにある。In view of the above circumstances, the inventor of the present application has previously
In No. 17641, we proposed a self-propelled excavation device that can save labor in the complicated work of excavation used in excavation work associated with sewage management construction work. The purpose of the present invention is to propose an earth retaining method for excavation work that uses the above-mentioned self-propelled erecting, saves labor in the erecting work, and improves workability in erecting sheet piles, resulting in extremely high work efficiency.

〔問題点を解決するための手段〕[Means for solving problems]

以下図示する実施例により説明する。 This will be explained below with reference to the embodiments shown in the drawings.

第１図はこの土留工法で用いる自走腹起１である。この
腹起の並列する２本の腹起フレーム２．２はそれぞれ前
・後端部３，４とからなり、前・後端部３，４は推進ジ
ヤツキ５を介して連結し、伸縮自在となっている。また
、並列する２本のフレームの前端部３．３問および後端
部４．４間はそれぞれ支持ジヤツキ６で連結し、その間
隔調整が可能となしている。なお、この腹起１はフレー
ム２が縮んだ状態で全長的５５０ＣＩ１１、推進ジヤツ
キのストローク長は５０ｃｍである。Figure 1 shows the self-propelled riser 1 used in this earth retaining method. The two side-by-side abdominal frames 2.2 each consist of front and rear end portions 3 and 4, and the front and rear end portions 3 and 4 are connected via a propulsion jack 5 and are extendable and retractable. It has become. Further, the front end portions 3.3 and the rear end portions 4.4 of the two parallel frames are connected by support jacks 6, respectively, so that the distance between them can be adjusted. The total length of this vent 1 is 550 CI11 when the frame 2 is contracted, and the stroke length of the propulsion jack is 50 cm.

この腹起１は前端部３，３問および後端部４゜４間の支
持ジヤツキ６を押して矢板７．７を支持する。そして前
端部の支持ジヤツキ６を僅か縮め、推進ジヤツキ５を押
してフレーム前端部３を伸長し、続いて支持ジヤツキ６
を押して前端部３で矢板を７を支持する。次に後端部の
支持ジヤツキ６を縮め、推進ジヤツキ５を縮めて後端部
４を前方に引き寄せ、支持ジヤツキ６を押して後端部を
矢板７に押当て支持する。このサイクルを繰返し、１サ
イクルに推進ジャツギ５０ストローク長に見合った距離
を自走前進して、矢板を支持する機能を発揮する。This riser 1 supports the sheet piles 7.7 by pushing against the support jacks 6 between the front ends 3, 3 and the rear ends 4.4. Then, slightly retract the support jack 6 at the front end, push the propulsion jack 5 to extend the frame front end 3, and then press the support jack 6.
Press to support the sheet pile 7 at the front end 3. Next, the support jack 6 at the rear end is retracted, the propulsion jack 5 is retracted to draw the rear end 4 forward, and the support jack 6 is pushed to press and support the rear end against the sheet pile 7. This cycle is repeated, and the propulsion jack moves forward by itself a distance corresponding to the stroke length of 50 in one cycle, and exhibits the function of supporting the sheet pile.

第２図はこの土留工法で用いる矢Ｆｊ、７であり、両側
端面に相互に嵌合する凹部８、凸部９が設けてあり、そ
の幅は１００　ｃｍである。Fig. 2 shows an arrow Fj, 7 used in this earth retaining method, which has a concave part 8 and a convex part 9 that fit into each other on both end faces, and the width thereof is 100 cm.

以下、この腹起１、矢板７を用いたこの発明になる開削
工事の土留工法を工程順に説明する。Hereinafter, the earth retaining method for excavation work according to the present invention using the uprights 1 and the sheet piles 7 will be explained in order of steps.

第３図において、下水管を埋設すべき地盤を掘削機のパ
ケットで自立できる深さの地盤まで掘削する。ごの開削
した溝１０内に自走腹起１、溝開口縁に係止して補助腹
起１１をそれぞれ掘削機の吊込ビームで吊込み配置しく
第４図参照）、溝１０両側壁１２に添付けて複数の矢板
７を相互に側端面の凹凸部８，９を嵌合せしめ連続して
吊込み据付ける（第５図参照）。続いて掘削機のパケッ
ト（図示せず）で開削を続け、同時に矢板７．７を所定
の高さ位置において自走腹起１および補助腹起１１で支
持しつつ、床付まで掘削し、基礎工１３を施工する（第
６図参照）。In FIG. 3, the ground where the sewer pipe is to be buried is excavated with a packet of an excavator to a depth that allows it to stand on its own. A self-propelled rib 1 is placed in the groove 10 excavated by the excavator, and an auxiliary rib 11 that is locked to the groove opening edge is suspended by the suspension beam of the excavator (see Fig. 4), and both side walls 12 of the groove 10 are placed. Then, the plurality of sheet piles 7 are successively hung and installed by fitting the uneven portions 8 and 9 of the side end faces into each other (see Fig. 5). Next, excavation continued with the excavator packet (not shown), and at the same time, while supporting the sheet pile 7.7 at a predetermined height position with the self-propelled upright 1 and the auxiliary upright 11, the excavation was carried out to the floor, and the foundation was removed. Construct work 13 (see Figure 6).

この状態で下水管１４を掘削機に取付けである吊りビー
ム（図示せず）で吊込み配管し、その周囲を砂煙１５す
る（第７図参照）。引続き、前方地盤（第８図右側方向
）を開削するとともに、自走腹起１を前方に走行せしめ
、同時に配管済部分を砂煙１５、埋戻１６および転圧を
行ない、配管済部分の矢板７を吊りビームで吊り上げ引
抜き、新に開削した前方溝内に建込む。In this state, the sewer pipe 14 is suspended by a hanging beam (not shown) attached to the excavator, and the surrounding area is covered with sand smoke 15 (see FIG. 7). Subsequently, the ground in front (right side in Figure 8) is excavated, the self-propelled upright 1 is moved forward, and at the same time, the piped part is sand clouded 15, backfilled 16, and compacted, and the sheet pile 7 of the piped part is It will be lifted out using a hanging beam and placed in the newly excavated front trench.

この際既設の側端面と凹凸部８．９を嵌合し連続して建
込む。この開削、自走腹起の前進、配管、埋戻し、矢板
の引抜き、建込みを繰返しこの土留工法による下水管の
埋設が進められる（第９図参照）。At this time, the existing side end surface and the uneven portion 8.9 are fitted and built continuously. This excavation, advancement of the self-propelled upright, piping, backfilling, pulling out of sheet piles, and erection are repeated to proceed with the burial of sewer pipes using this earth retaining method (see Figure 9).

〔作用および発明の効果〕[Action and effect of the invention]

この土留工法は以上の構成からなり、自走腹起は開削に
追従して前進して矢板を支持し、腹起後部の矢板は引抜
かれて、腹起前部位置に既設の矢板の側端面と凹凸部で
嵌合せしめて連続して建込む。従って腹起の解体、組立
に手間がかからず、矢板を容易に建込ができる。この自
走腹起はフレームの前・後端部を前進せしめる際に、支
持ジヤツキを縮め矢板の支持を弛めたり、あるいは矢板
の建込に際してその支持を弛めるので、矢板が傾いたり
、倒れたりし易かった。しかしこの工法では、矢板は相
互に側端面の凹凸部で嵌合して建込まれるために矢板を
正確、容易に建込みでき、自走腹起による矢板の支持と
相俟って土留作業の能率を大幅に向上せしめることがで
きる。This earth retaining method consists of the above-mentioned structure. The self-propelled pile moves forward following the excavation to support the sheet pile, and the sheet pile behind the pile is pulled out, and the side end surface of the existing sheet pile is placed at the front position of the pile. and the uneven parts are fitted together and built continuously. Therefore, it does not take much time to dismantle and assemble the upright, and the sheet piles can be easily erected. When this self-propelled upright moves the front and rear ends of the frame forward, it shortens the support jacks and loosens the support for the sheet pile, or when the sheet pile is erected, it loosens the support, so the sheet pile may tilt or fall. It was easy. However, in this construction method, the sheet piles are built by fitting each other with the uneven parts of the side end faces, so the sheet piles can be erected accurately and easily, and together with the support of the sheet piles by self-propelled uprights, it is easy to do earth retaining work. Efficiency can be greatly improved.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は自走腹起の一部断面で示す平面図、第２図は矢
板の側面図、第３．４，５，６，７，８．９図（ａ）　
、　（ｂ）は実施例の土留工法を工程順に示す側面およ
び正面の断面図である。 １・・・自走腹起、２・・・腹起フレーム、３・・・前
端部、４・・・後端部、５・・・推進ジヤツキ、６・・
・支持ジヤツキ、７・・・矢板、８・・・凹部、９・・
・凸部、１０・・・溝、１１・・・補助腹起、１２・・
・両側壁、１３・・・基礎工、１４・・・下水管、１５
・・・砂煙、１６・・・埋戻。 第３図 （ｂ）（０） 第８１ 第９図Figure 1 is a partial cross-sectional plan view of the self-propelled belly rise, Figure 2 is a side view of the sheet pile, Figures 3.4, 5, 6, 7, 8.9 (a)
, (b) are side and front cross-sectional views showing the earth retaining method of the example in the order of steps. DESCRIPTION OF SYMBOLS 1... Self-propelled abdominal lift, 2... Belly raise frame, 3... Front end part, 4... Rear end part, 5... Propulsion jack, 6...
・Support jack, 7... Sheet pile, 8... Recess, 9...
・Convex part, 10...Groove, 11...Auxiliary abdominal raise, 12...
・Both sides walls, 13...Foundation work, 14...Sewage pipe, 15
...Sand smoke, 16...Backfilling. Figure 3 (b) (0) Figure 81 Figure 9

Claims (1)

【特許請求の範囲】[Claims] （１）開削した溝の両側壁面に添い複数の矢板を連続し
て建込み、これを腹起で支持する開削工事の土留工法に
おいて、並列する２本の腹起フレームがそれぞれ前・後
端間で伸縮自在に連結してあり、並列する２本のフレー
ムの前端部間および後端部間がそれぞれ間隔調整自在に
連結してある自走腹起を、並列する２本のフレームの前
・後端部間隔を交互に縮めて矢板の支持を緩め、同時に
各フレームの前・後端部間を交互に伸長、縮小させて開
削速度に追従して自走前進させ、矢板の両側端面に相互
に嵌合する凹部と凸部を設けておき、腹起の前進に追従
し腹起後部に建込んである矢板を引抜き、この矢板を腹
起前部位置に、既設の矢板の側端面との間を凹凸部で嵌
合し連続して建込むことを特徴とする開削工事の土留工
法。(1) In the earth retaining method for cut-and-cover construction, in which a plurality of sheet piles are erected in succession along both side walls of an excavated trench, and supported by uprights, two parallel upright frames are placed between the front and rear ends, respectively. A self-propelled belly riser is connected telescopically to the front and rear ends of the two parallel frames, and the front and rear ends of the two parallel frames are connected so that the distance between them can be adjusted. The end spacing is alternately shortened to loosen the support for the sheet pile, and at the same time, the front and rear ends of each frame are alternately extended and contracted to move forward by themselves following the excavation speed, and the end surfaces of the sheet pile are mutually attached to each other. A concave part and a convex part to fit are provided, and the sheet pile installed at the rear of the upright is pulled out following the advance of the upright, and this sheet pile is placed in the front position of the upright, between the side end surface of the existing sheet pile. An earth retaining method for cut-and-cover construction that is characterized by fitting and erecting continuously at uneven parts.