JP3352869B2 - Construction method of manhole / propulsion sinking pit and settling control device used for it - Google Patents

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【産業上の利用分野】最近都市の下水道の整備・電力・
通信網等の発達によりマンホール兼推進用沈設立坑によ
る小径管の推進工法が多用されている。本発明はマンホ
ール兼推進用沈設立坑の構築に際し、構築予定地（道
路）の占用幅を極力少なくして構築中の交通障害と騒音
レベルを軽減すると共に、短期・経済的な施工を可能に
するマンホール兼推進用沈設立坑の構築工法と、沈設作
業中の過沈下による危険と工事の失敗による経費増加等
を防止し作業を円滑にする沈降制御装置を提供する。[Industrial applications] Recent urban sewerage development, electricity and
Due to the development of telecommunications networks, small-diameter pipe propulsion methods using manholes and propulsion sinks have been widely used. INDUSTRIAL APPLICABILITY The present invention minimizes the occupied width of a planned construction site (road) when constructing a manhole / propulsion sinking pit, reduces traffic obstacles and noise levels during construction, and enables short-term and economical construction. Provided is a method of constructing a submerged pit for manhole and propulsion, and a sedimentation control device that facilitates work by preventing the risk of excessive subsidence during subsidence work and the increase in cost due to construction failure.

【０００２】[0002]

【従来の技術】予定地に所定深さの掘削穴を設け、掘削
穴内側から山止め用のライナプレートを所要深さ迄底部
方向へ円筒状に接続して人力で組付け、そのライナプレ
ート内の掘削穴底面に刃口の付いた遠心力成形による円
筒形断面の底部ブロックを吊り降ろして、底部ブロック
内面の土砂を掘削して順次同様形状の上段の沈設ブロッ
ク等を載置連結し最上段の沈設ブロック上面に開口部を
設けた床版ブロックを設置し、床版ブロック上にマンホ
ールを載置し床版ブロック上の空間部を埋戻してマンホ
ール兼推進用沈設立坑を構築している。2. Description of the Related Art An excavation hole having a predetermined depth is provided in a planned place, and a liner plate for retaining is connected from the inside of the excavation hole to a required depth in a cylindrical shape in a bottom direction and assembled by human power. The bottom block of the cylindrical section by centrifugal force forming with a cutting edge is hung down at the bottom of the excavation hole, the earth and sand on the inner surface of the bottom block is excavated, and the upper set-up block etc. of the same shape are placed and connected in sequence. A slab block with an opening on the top of the slab block is installed, manholes are placed on the slab block, and the space on the slab block is backfilled to construct a manhole and propulsion sunk pit. .

【０００３】しかし、従来の遠心力成形による円筒形断
面の底部ブロックは重量が大で、大型トラックによる狭
隘地への進入・運搬も困難で施工には大型クレーンを要
するうえ、掘削穴内の地下水位が高い場合には所要深さ
迄のライナプレートの組付が不可能で、沈設中不意の過
沈下による危険の発生、また、修正困難な傾斜・移動等
により施工期間・工事費が増加する等の欠点があり、過
沈下による危険を防止し沈降作業が円滑に行えると共
に、短期・経済的な施工を可能するマンホール兼推進用
沈設立坑の構築工法と、本工法を円滑にサポートする沈
降制御装置と、トータルコストの低減可能な沈設ブロッ
ク等が要望されていた。[0003] However, the conventional bottom block having a cylindrical cross section formed by centrifugal force is heavy, and it is difficult to enter and convey to a narrow place by a large truck. Therefore, a large crane is required for the construction, and the groundwater level in the excavation hole is required. If the height is high, it is impossible to assemble the liner plate to the required depth, causing danger due to sudden subsidence during subsidence, and increasing the construction period and construction costs due to difficult inclination and movement, etc. The method of constructing a manhole / propulsion sinking pit that prevents danger due to excessive settlement and facilitates sedimentation work and enables short-term and economical construction, and sedimentation control that smoothly supports this method There has been a demand for a device and a submerged block capable of reducing the total cost.

【０００４】[0004]

【発明が解決しようとする課題】本発明の目的は、従来
の欠点を排除し、短期・経済的に施工できるマンホール
兼推進用沈設立坑の構築工法と、それに用いる作業が安
全な沈降制御装置を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide a method for constructing a manhole / propulsion sinking pit that eliminates the conventional disadvantages and that can be constructed economically in a short period of time, and a sedimentation control device that is safe to use. It is to provide a.

【０００５】[0005]

【課題を解決するための手段】上記課題を解決するた
め、本発明のマンホール兼推進用沈設立坑の構築工法は
請求項１に記載のように、第１工程では、階段状に第１
底面５と第２底面１０を設けた掘削穴１５の第２底面１
０に、上下に所定間隔離して着脱可能に構成した上部受
枠２０と下部受枠２２を水平に載置し、上部受枠２０と
下部受枠２２の外周面をガイドとして簡易鋼矢板３０を
所要深さ打込んで周設し、簡易鋼矢板３０外側の空間部
にコンクリート４０を打設し、該コンクリート４０に所
定数のアンカーボルト２５を突設する。Means for Solving the Problems To solve the above problems,
Therefore, the method of constructing the manhole and propulsion sinking pit of the present invention
As set forth in claim 1, in the first step , the first step is performed stepwise.
Second bottom surface 1 of excavation hole 15 provided with bottom surface 5 and second bottom surface 10
0, the upper receiving frame 20 and the lower receiving frame 22 which are configured to be detachable vertically separated from each other by a predetermined distance are horizontally placed, and the simple steel sheet pile 30 is driven to a required depth by using the outer peripheral surfaces of the upper receiving frame 20 and the lower receiving frame 22 as guides. The concrete 40 is cast in the space outside the simple steel sheet pile 30, and a predetermined number of anchor bolts 25 are protruded from the concrete 40.

【０００６】第２工程では、コンクリート４０硬化後上
部受枠２０と下部受枠２２を撤去して簡易鋼矢板３０を
抜去し、第２底面１０の所定位置に、一体に成形した刃
口部Ｂ０を水平に設置し、該刃口部Ｂ０の上部に縦方向
に分割し連結可能に製造した任意断面形状の底部用の沈
設ブロックＢ１ａを吊り降ろし、次に同じく縦方向に分
割して製造した任意断面形状の底部用の沈設ブロックＢ
１ｂを吊り降ろして連結し一体化した沈設ブロックＢ１
を前記刃口部Ｂ０と連結し、沈設ブロックＢ１外周と前
記アンカーボルト２５間にセンタリング装置５０を介在
させ、沈設ブロックＢ１の上に前記同様に分割して製造
した上段の沈設ブロックＢ２ａ，Ｂ２ｂを吊り降ろして
連結し一体化した沈設ブロックＢ２と前記沈設ブロック
Ｂ１を連結し、内部の土砂を掘削排土し刃口部Ｂ０が地
中に嵌入した時点で地表から刃口部Ｂ０上部に挿入した
導管Ｐ１を通じて遅硬性減摩材Ｄを圧送しながら、更に
掘削排土して沈設ブロックＢ２を第１底面５上に所定寸
法露出する位置まで沈降させ、必要に応じ所要段数の沈
設ブロックを前記同様連結し内部を掘削排土して第１底
面５上に所定寸法露出する位置まで沈降させる。In the second step, after the concrete 40 is hardened, the upper receiving frame 20 and the lower receiving frame 22 are removed, the simple steel sheet pile 30 is removed, and the integrally formed blade opening B0 is horizontally placed at a predetermined position on the second bottom surface 10. , A suspended block B1a for an arbitrary cross-sectional shape manufactured vertically and divided and connected to the upper part of the cutting edge portion B0 is hung down, and then similarly formed in the vertical direction to be manufactured. Block B for the bottom of the building
1b is suspended and connected to form an integrated sunk block B1.
Is connected to the blade opening B0, a centering device 50 is interposed between the outer periphery of the sunk block B1 and the anchor bolt 25, and the upper sunk blocks B2a and B2b, which are manufactured by dividing the sunk block B1 in the same manner as described above. The sunk block B2 and the sunk block B1 were connected by being suspended and lowered, and the sunk block B1 was connected, and the earth and sand inside the sunk block was excavated and discharged, and when the slat B0 was inserted into the ground, it was inserted into the upper part of the slat B0 from the ground surface. While feeding the slow-hardening lubricating material D through the conduit P1, the excavated earth is further excavated and the sunk block B2 is settled to a position where the sunk block B2 is exposed on the first bottom surface 5 by a predetermined size. It is connected, excavated and excavated inside, and settles to a position where it is exposed to a predetermined size on the first bottom surface 5.

【０００７】更に、第３工程では、過沈下による内部作
業員の危険を防止し作業を円滑にするための沈降制御装
置１３０の反力受基部１１０を前記アンカーボルト２５
に固着し、反力受基部１１０の立脚部１０９に所要長さ
のガイド軌条１１５を垂設し、該ガイド軌条１１５に摺
動且つ着脱自在なブラケット１１６をガイド軌条１１５
の係止孔１０４の所定位置に係止し、ブラケット１１６
の連結部１１７に押圧シリンダ１２０を垂設して前記上
段ブロックの上面ＢＴを押圧可能に設け、最上段の沈設
ブロックに連結した過沈下防止用の螺杆８６を前記ブラ
ケット１１６の螺杆挿通孔９６に遊挿し、螺杆挿通孔９
６から突出した螺杆８６上方の所定位置に停止ナット８
７を螺嵌し、前記導管Ｐ１から所定量の遅硬性減摩材Ｄ
を地山と沈設ブロック間の空隙部Ｇに圧入し、流体加圧
により押圧シリンダ１２０を作動させ停止ナット８７を
調整し沈降を制御しながら内部底面の土砂を掘削排土し
所定深度まで沈降着底させる。Further, in the third step, the reaction force receiving base 110 of the sinking control device 130 for preventing the danger of the internal worker due to excessive sinking and smoothing the work is attached to the anchor bolt 25.
And a guide rail 115 of a required length is suspended from the standing leg 109 of the reaction force receiving base 110, and a slidable and detachable bracket 116 is mounted on the guide rail 115.
Is locked in a predetermined position of the locking hole 104 of the
A pressing cylinder 120 is vertically attached to the connecting portion 117 of the bracket so that the upper surface BT of the upper block can be pressed, and a screw 86 for preventing excessive sinking connected to the uppermost block is inserted into the screw insertion hole 96 of the bracket 116. Play insertion, screw rod insertion hole 9
A stop nut 8 is provided at a predetermined position above a screw rod 86 projecting from
7 and a predetermined amount of the slow-hardening lubricating material D from the conduit P1.
Is pressed into the gap G between the ground and the sunk block, the pressurizing cylinder 120 is actuated by fluid pressurization, the stop nut 87 is adjusted, and the sediment on the inner bottom surface is excavated and discharged while the sedimentation is controlled to settle to a predetermined depth. Let it bottom.

【０００８】また、第４工程では、底部のスライム中に
凝集剤投入後水及び分離した凝集物を排除した後セメン
ト系固化剤を投入し、該セメント系固化剤硬化後底詰コ
ンクリートＣを打設し、底詰コンクリートＣ硬化後排水
し、前記沈降制御装置１３０と過沈下防止用螺杆８６及
びセンタリング手段５０を撤去し、残余空隙部Ｇに遅硬
性減摩材Ｄを充填する。In the fourth step, after the coagulant is introduced into the bottom slime, water and separated aggregates are removed, a cement-based solidifying agent is introduced, and after the cement-based solidifier is hardened, the concrete C is filled. After the concrete C is hardened, the concrete is drained after the hardening of the concrete C. The sedimentation control device 130, the screw 86 and the centering means 50 for preventing excessive settlement are removed, and the remaining gap G is filled with the slow-hardening lubricating material D.

【０００９】前記底部用の沈設ブロックＢ１内側の推進
管発進坑口から管渠（推進管）の推進工程を行う。[0009] A propulsion process of a sewer (propulsion pipe) is performed from the propulsion pipe starting well inside the sinking block B1 for the bottom part.

【００１０】管渠（推進管）の推進工程終了後の第５工
程では、沈設ブロック上部に開口部を偏心して設けた中
間床版ブロックＦを載置連結し、該中間床版ブロックＦ
上に既知のマンホールＭを載置し、前記掘削穴１０空間
部を埋戻すマンホール兼推進用沈設立坑の構築工法を構
成している。[0010] In the fifth step after the end of the propulsion step of the sewer (propulsion pipe), an intermediate slab block F having an opening eccentrically provided above the sinking block is placed and connected.
A known manhole M is placed on the top, and a construction method of a manhole / propulsion sinking pit for backfilling the space portion of the excavation hole 10 is configured.

【００１１】また、請求項２では、外部（掘削穴外また
は製造工場）において一体化した底部用の沈設ブロック
と上段用の沈設ブロックを使用して構築する、ことを特
徴とする請求項１記載のマンホール兼推進用沈設立坑の
構築工法を構成している。According to a second aspect of the present invention, the apparatus is constructed by using a bottom sunk block and an upper sunk block integrated outside (outside of a drilling hole or a manufacturing plant). The construction method of the manhole / propulsion pit was established.

【００１２】更に、請求項３では、第３工程において、
前記沈降制御装置１３０のブラケット１１６に挿通して
いた過沈下防止用の螺杆８６を、アンカーボルト２５に
固着した過沈下防止基部９７に穿設した螺杆挿通孔９６
に挿通し、該螺杆８６を最上段の沈設ブロックに連結し
た連結金具５７の螺杆連結部５６に螺嵌して螺杆挿通孔
９６から上方へ突出した螺杆８６の所要位置に停止ナッ
ト８７を螺嵌した過沈下防止装置９０に換装した、こと
を特徴とする請求項１記載のマンホール兼推進用沈設立
坑の構築工法を構成している。Further, according to claim 3, in the third step,
A screw rod 86 for preventing excessive sinking, which has been inserted through the bracket 116 of the sinking control device 130, is replaced with a screw insertion hole 96, which is formed in a base 97 for preventing excessive settlement, which is fixed to the anchor bolt 25.
And the stop nut 87 is screwed into a required position of the screw rod 86 protruding upward from the screw insertion hole 96 by screwing the screw rod 86 into the screw connection portion 56 of the connection fitting 57 connecting the uppermost sunk block. The construction method for a manhole / propulsion sinking pit according to claim 1, wherein the method is replaced with the oversinking prevention device 90 described above.

【００１３】また、請求項４では、第２乃至第４工程に
おいて、湧水により底部の掘削状態が視認困難な場合、
深度目盛ｍを表示し下端に複数の細孔Ｎを穿設した所要
長さの水平部ｐｈを逆Ｔ形に連結して設けた導管Ｐ２
を、視認困難な刃口部Ｂ０内側に挿入して圧搾空気を圧
送し、前記刃口部Ｂ０内側の土砂を崩壊させて排土す
る、ことを特徴とする請求項１または２何れか１項記載
のマンホール兼推進用沈設立坑の構築工法を構成してい
る。According to a fourth aspect of the present invention, in the second to fourth steps, when the excavated state of the bottom is difficult to visually recognize due to spring water,
A conduit P2 in which a horizontal portion ph of a required length, in which a depth scale m is displayed and a plurality of pores N are formed at the lower end, is connected in an inverted T-shape.
3 is inserted into the inside of the blade port B0, which is difficult to see, and pressurized air is fed to collapse the earth and sand inside the blade port B0 and discharge the soil. It constitutes the construction method for the manhole and propulsion sinking pit described.

【００１４】また、本発明の沈降制御装置は、請求項５
に記載のように、予定地を所定深さ掘削して掘削穴を設
け、該掘削穴内に刃口の付いた底部ブロックを吊り降ろ
して、該底部ブロック内面の土砂を掘削して順次上段の
沈設ブロック等を載置連結し最上段の沈設ブロック上面
に開口部を設けた床版ブロックを載置し、該床版ブロッ
ク上にマンホールを載置し床版ブロック上の空隙部を埋
戻すマンホール兼推進用沈設立坑の構築工法に用いる沈
降制御装置１３０であって、階段状に第１底面５と第２
底面１０を設けた掘削穴１５の第１底面５に埋設したア
ンカーボルト２５に立脚部１０９を設けた反力受部材１
１０を固着し、立脚部１０９に長手方向の所定位置に複
数の係止孔１０４を設けたガイド軌条１１５を垂設し、
該ガイド軌条１１５に摺動可能且つ前記係止孔１０４に
係止可能に設けたブラケット１１６を係合し、該ブラケ
ット１１６下面に一端を連結し他端に押圧部１１９を設
けた押圧シリンダ１２０を設け、過沈下防止のため沈設
ブロックに連結した螺杆８６をブラケット１１６の螺杆
挿通孔９６に遊挿し停止ナット８７を所要位置上部に螺
嵌して成る、ことを特徴とする沈降制御装置を構成して
いる。Further, the settling control device of the present invention is characterized in that
Excavation of the planned site to a predetermined depth
Hang a bottom block with a cutting edge in the excavation hole.
Then, excavate the earth and sand on the inner surface of the bottom block and
Place the sunk blocks etc. and connect them to the top of the top sunk block.
Place a slab block with an opening in the slab block.
Place the manhole on the floor and fill the gap on the floor slab block.
Settlement used for the construction method
A descending control device 130, wherein the first bottom surface 5 and the second
Reaction force receiving member 1 in which upright portion 109 is provided on anchor bolt 25 embedded in first bottom surface 5 of excavation hole 15 provided with bottom surface 10.
10, a guide rail 115 provided with a plurality of locking holes 104 at predetermined positions in the longitudinal direction is vertically provided on the standing portion 109,
A pressing cylinder 120 having a guide 116 provided so as to be slidable on the guide rail 115 and lockable in the locking hole 104 is engaged, and one end is connected to the lower surface of the bracket 116 and a pressing portion 119 is provided on the other end. A settling control device characterized in that a screw 86 connected to a set block is loosely inserted into a screw insertion hole 96 of a bracket 116 and a stop nut 87 is screwed on a required upper portion to prevent excessive sinking. ing.

【００１５】更に、請求項６では、沈降制御装置１３０
のガイド軌条１１５にラック状の歯合部１１４を設ける
と共に、該ガイド軌条１１５に摺動可能に係合させたブ
ラケット１１６Ｂを設け、該ブラケット１１６Ｂ内に下
降時のみ遊動するラチェット１２２をスプリングＳＰに
より前記歯合部１１４に常時歯合可能に付勢して設け
た、ことを特徴とする請求項５記載の沈降制御装置を構
成している。Further, according to claim 6, the sedimentation control device 130
The guide rail 115 is provided with a rack-shaped toothed portion 114, and a bracket 116B slidably engaged with the guide rail 115 is provided. A ratchet 122 that moves only in the bracket 116B only when descending is moved by a spring SP. The sedimentation control device according to claim 5 , characterized in that the toothing portion (114) is always urged to be engaged.

【００１６】[0016]

【作用】以下、図１乃至図６を使用し、本発明のマンホ
ール兼推進用沈設立坑の構築工法の作用を説明する。図
１に示す請求項１に係る第１工程では、掘削穴１５の水
平にした第２底面１０に分離可能な上部受枠２０下部受
枠２２を設置し、両受枠２０，２２の外周面をガイドと
しているので簡易鋼矢板３０を短時間で容易に垂直に打
込むことができ、第２底面１０下部の地山が一時的に自
立しにくい場合、地下水位が高い場合にも簡単に山止め
ができ、簡易鋼矢板３０外側に打設したコンクリート４
０が地山に定着し後工程で使用するアンカーボルト２５
の堅固な埋設と、隣接する民地・住宅等への被害を及ぼ
すことなく沈降作業に必要な所要空間を適正位置に造る
ことができる。The operation of the method for constructing a manhole / propulsion sinking pit according to the present invention will be described below with reference to FIGS. In the first step according to claim 1 shown in FIG. 1, a separable upper receiving frame 20 and a lower receiving frame 22 are installed on the horizontal second bottom surface 10 of the excavation hole 15, and the outer peripheral surfaces of both receiving frames 20 and 22 are used as guides. Since the simple steel sheet pile 30 can be driven vertically easily in a short time, it can be easily stopped even when the ground under the second bottom surface 10 is temporarily difficult to stand alone or when the groundwater level is high. Concrete 4 cast outside the simple steel sheet pile 30
0 is anchored on the ground and anchor bolt 25 to be used in the post-process
The necessary space required for the subsidence work can be made at an appropriate position without damaging the neighboring land and houses.

【００１７】図２に示す請求項１に係る第２工程の初期
では、コンクリート４０硬化後前記上部受枠２０と下部
受枠２２を分離して夫々撤去し、簡易鋼矢板３０を抜去
しているので、水平に設けた第２底面１０の所定位置に
刃口部Ｂ０を設置するのは容易であり、分割した沈設ブ
ロックＢ１ａとＢ１ｂは軽量なため扱いが簡単で小型ク
レーンで容易に載置でき、内面からコッターｊｃまたは
図示しないボルト結合により容易に一体化でき、前記刃
口部Ｂ０とも内面から容易に連結することができる。ま
た、この工程で前記アンカーボルト２５と沈設ブロック
Ｂ１の間にセンターリング装置５０またはセンタリング
スペーサ５０Ｂ（図左上及び図３で示す）を設けている
ので以後の工程を円滑に行うことができる。In the initial stage of the second step according to claim 1 shown in FIG. 2, after the concrete 40 is hardened, the upper receiving frame 20 and the lower receiving frame 22 are separated and removed, and the simple steel sheet pile 30 is removed. It is easy to set the blade port B0 at a predetermined position on the second bottom surface 10 provided horizontally, and the divided submerged blocks B1a and B1b are lightweight and easy to handle, and can be easily mounted by a small crane. It can be easily integrated by a cotter jc or a bolt connection (not shown), and can be easily connected to the blade port B0 from the inner surface. In this step, since the centering device 50 or the centering spacer 50B (shown in the upper left of FIG. 3 and FIG. 3) is provided between the anchor bolt 25 and the submerged block B1, the subsequent steps can be performed smoothly.

【００１８】図３はセンタリング装置の斜視図で、図右
上に示すように沈設ブロックＢの外周に当接する如く配
設（矢符５０で示す）している、従って固定部材５１の
調整ボルト５１ｂにより可動部材５２先端のローラ５３
またはセンタリングスペーサ５０Ｂのスペーサ５８が適
正位置を保持して転支または摺接し、沈降の初期段階か
ら傾斜・移動量等を視認しながら容易に修正することが
できる。FIG. 3 is a perspective view of the centering device. As shown in the upper right part of the figure, the centering device is disposed (shown by an arrow 50) so as to be in contact with the outer periphery of the submerged block B. Roller 53 at the end of movable member 52
Alternatively, the spacer 58 of the centering spacer 50B is rolled or slid while maintaining an appropriate position, and can be easily corrected while visually observing the inclination, the movement amount, and the like from the initial stage of sedimentation.

【００１９】図４に示す請求項１に係る第２工程の後期
では、所要段数の沈設ブロックＢ２を載置し掘削と沈降
を反復して所要段数の沈設ブロックを、前記センタリン
グ装置５０、センタリングスペーサ５０Ｂ等により傾斜
・移動量等を視認し修正しながら所定位置に沈降させる
ことができる。In the second stage of the second step according to the first aspect shown in FIG. 4, the required number of sunk blocks B2 are placed, and excavation and settling are repeated to set the required number of sunk blocks into the centering device 50 and the centering spacer. It is possible to settle at a predetermined position while visually observing and correcting the inclination, the movement amount, etc. by using 50B or the like.

【００２０】図５に示す請求項１に係る第３，第４工程
では、最上段の沈設ブロックの連結金具５７の螺杆連結
部５６に沈降制御装置１３０の過沈下防止用の螺杆８６
を連結し、該螺杆８６をブラケット１１６に挿通し、過
沈下の許容範囲内の上位置に停止ナット８７を螺嵌して
いるので、不意の過沈下を許容範囲内に留めることがで
き、大型クレーンによる再度の引き上げ・過度の傾斜等
修復が困難且つ高価になる施工の失敗と作業員への危険
を未然に防止することができる。In the third and fourth steps according to the first aspect shown in FIG. 5, the screw 86 for preventing the subsidence of the sedimentation control device 130 from being attached to the screw connecting portion 56 of the connecting fitting 57 of the uppermost sunk block.
And the screw 86 is inserted into the bracket 116, and the stop nut 87 is screwed into the upper position within the allowable range of excessive sinking, so that unexpected excessive sinking can be kept within the allowable range, It is possible to prevent a failure of the construction and a danger to the operator, which would be difficult and expensive to repair again, such as lifting up or excessive inclination by the crane, etc.

【００２１】また、第４工程では、沈降が最終段階に近
づき沈降ブロックの周面摩擦・刃口部Ｂ０の反力の増加
等により、前工程と異なり慎重な掘削が要求されるが、
沈降制御装置１３０のガイド軌条にブラケット１１６を
介して連結された複数の押圧シリンダ１２０の押圧によ
る載荷重を制御しながら容易に行え、前記過沈下防止用
の停止ナット８７の螺入位置の調整により、螺杆８６の
深度目盛ｍを確認しながら所定の沈降を行うことができ
る。Further, in the fourth step, unlike the previous step, careful excavation is required due to the sedimentation approaching the final stage, the peripheral surface friction of the sedimentation block, the increase in the reaction force of the cutting edge B0, and the like.
The control can be easily performed while controlling the load due to the pressing of the plurality of pressing cylinders 120 connected to the guide rail of the sedimentation control device 130 via the bracket 116, and by adjusting the screwing position of the stop nut 87 for preventing excessive subsidence. The predetermined settling can be performed while checking the depth scale m of the screw 86.

【００２２】また、第５工程では、掘削により乱れた底
面の土砂をセメント系固化材ｃｋにより処理をした後底
詰コンクリートＣを打設し、遅硬性減摩材Ｄが時間経過
により硬化して地山と定着するので、着底した立坑（沈
設ブロック）に安定した支持力を与え、推進管Ｓ布設時
の推進機の反力にも充分耐えることができる。Further, in the fifth step, the earth and sand on the bottom surface disturbed by the excavation is treated with the cement-based hardening material ck, and then the concrete C is poured in, and the slow-hardening lubricating material D hardens over time. Since the anchor is fixed to the ground, a stable supporting force can be given to the shaft which has settled (the sunk block), and the reaction force of the propulsion device when the propulsion pipe S is laid can be sufficiently endured.

【００２３】次に、図６に示す請求項１に係る第５工程
を終了すれば、安定したマンホール兼推進用沈設立坑を
短時間で構築でき、構築予定地の道路占用幅も少なくト
ータルコストを軽減することができる。Next, if the fifth step according to claim 1 shown in FIG. 6 is completed, a stable manhole / propulsion sinking pit can be constructed in a short time, and the road occupation width of the planned construction site is small and the total cost is reduced. Can be reduced.

【００２４】また、図示しない請求項２記載の第２工程
では、外部（掘削穴外または製造工場）において一体化
した底部用の沈設ブロックと上段用の沈設ブロックを使
用して構築するので、施工時間を更に短縮できる。In the second step (not shown), the construction is performed using a bottom-side submerged block and an upper-side submerged block that are integrated outside (outside of a drilling hole or a manufacturing plant). The time can be further reduced.

【００２５】図７に示す請求項３に係る過沈下防止装置
９０は、請求項１記載の第３工程において、前記沈降制
御装置１３０のブラケット１１６に挿通していた過沈下
防止用の螺杆８６を、別に設けたアンカーボルト２５に
固着した過沈下防止基部９７に穿設した螺杆挿通孔９６
に挿通し、過沈下の許容範囲上部に停止ナット８７を螺
嵌し螺杆８６を最上段の沈設ブロックに連結した連結金
具５７の螺杆連結部５６に螺嵌して螺杆挿通孔９６から
上方へ突出した螺杆８６の所要位置に停止ナット８７を
螺嵌しているので、停止ナット８７の調整により、前記
沈降制御装置１３０に設けたものと同様に過沈下防止を
計ることができる。FIG. 7 shows an oversinking prevention device 90 according to a third embodiment of the present invention, wherein the screw 86 for preventing oversinking inserted into the bracket 116 of the settlement controller 130 in the third step of the first embodiment. And a threaded rod insertion hole 96 drilled in the excessive sinking prevention base 97 fixed to the separately provided anchor bolt 25.
And a stop nut 87 is screwed into the upper part of the allowable range of excessive sinking, and a screw rod 86 is screwed into the screw connecting portion 56 of the connecting metal fitting 57 connected to the uppermost sunk block to project upward from the screw insertion hole 96. Since the stop nut 87 is screwed into the required position of the threaded rod 86, by adjusting the stop nut 87, it is possible to prevent excessive sinking as in the case of the sedimentation control device 130.

【００２６】また、図８に示す実施例のものは、構築工
法の第２乃至第４工程において、湧水により底部の掘削
状態が視認困難な場合、深度目盛ｍを表示した導管Ｐ２
の下端に複数の細孔Ｎを穿設した所要長さの水平部ｐｈ
を逆Ｔ形に連結して設けているので、該導管Ｐ２に圧搾
空気を圧送すれば、沈降深度を深度目盛と触感で確認し
ながら前記刃口部Ｂ０内側の土砂を崩壊（刃口落とし）
させることが短時間で容易に行え、支持地盤を乱す過度
の深掘りを防止することができ、刃口落としのため流体
管路を刃口部に内設した沈設ブロックに比較し安価な沈
設ブロックを使用できる作用がある。In the embodiment shown in FIG. 8, in the second to fourth steps of the construction method, when the state of excavation at the bottom is difficult to see due to spring water, a conduit P2 indicating a depth scale m is provided.
Part ph of required length with a plurality of pores N drilled at the lower end of
Are connected in an inverted T-shape, so that if compressed air is supplied to the conduit P2, the sediment inside the blade opening B0 collapses while checking the sedimentation depth with the depth scale and tactile sensation (dropping the blade opening).
It can be done easily in a short time, can prevent excessive deep digging that disturbs the supporting ground, and is inexpensive sunk block compared to the sunk block in which the fluid pipeline is installed inside the knuckle part for dropping the knives There is an action that can be used.

【００２７】また、図９に示す請求項５に係る沈降制御
装置は、アンカーボルト２５に固着した反力受部材１１
０により、押圧シリンダ１２０による反力と過沈下防止
時の荷重等を吸収できるため、過度の傾斜・過沈下等に
よる施工の失敗・作業員への危険を未然に防止し、修正
のため大型クレーンによる再度の引上げ等煩雑な作業を
回避することができる。A settling control device according to a fifth aspect shown in FIG.
0, it is possible to absorb the reaction force of the pressing cylinder 120 and the load at the time of preventing excessive sinking, etc., so that the construction failure due to excessive inclination, excessive sinking, etc., and the danger to workers can be prevented beforehand. Troublesome work, such as re-pulling, can be avoided.

【００２８】また、図１０に示す請求項６に係る沈降制
御装置は、押圧シリンダの縮退時に縮退ストローク分ブ
ラケット１１６Ｂが自動的に降下するため、ブラケット
１１６Ｂの取付け位置をその都度変更する手間が省け、
省力化と時間短縮することができる。Further, in the sedimentation control device according to claim 6 shown in FIG. 10, since the bracket 116B automatically descends by the contraction stroke when the pressing cylinder contracts, the trouble of changing the mounting position of the bracket 116B each time can be omitted. ,
Labor saving and time can be reduced.

【００２９】これらマンホール兼推進用沈設立坑の構築
工法及びそれに用いる沈降制御装置によれば、鋼板で形
成し内部にコンクリートを充填した縦断面三角形の筒状
の刃口部Ｂ０を設け、該刃口部上部にパッキンｐａを周
設し、パッキンｐａ内側に、打設時に推進管発進（到
達）坑口Ｈを同時形成し縦方向に分割して製造した後一
体に結合し上下に連結可能に設けた底部用の沈設ブロッ
クＢ１を固着し、該底部用の沈設ブロックＢ１と同様に
縦方向に分割して製造した後一体に結合し上下連結可能
に設けた所要段数の上段用の沈設ブロックＢ２を、縦方
向の分割連結部を交互に位置するよう載置封着し、最上
段の沈設ブロックＢ２上に偏心して開口部を設けた中間
床版ブロックＦを載置封着し構成した沈設ブロックを構
築することができる。 Construction of these manhole / propulsion sinkholes
According to the method of construction and the sedimentation control device used therein, a cylindrical cutting edge B0 having a triangular longitudinal section formed of a steel plate and filled with concrete is provided, a packing pa is provided around the upper part of the cutting edge, and a packing pa is provided. On the inside, a propulsion tube starting (reaching) wellhead H is simultaneously formed at the time of casting, is divided vertically, is manufactured, and is then integrally connected. In the same manner as the submerged block B1, the submerged blocks B2 for a required number of stages, which are integrally formed by being vertically divided and manufactured so as to be vertically connectable in the same manner as the submerged block B1, are arranged so that the vertical divided connecting portions are alternately positioned. placing置封to wear, configured the sinking blocks eccentrically on sinking block B2 of the uppermost and置封wearing placing the intermediate floor slab block F which is provided an opening arrangement
Can be built.

【００３０】更に、図１１に示す沈設ブロックを適用す
れば、分割して製造し推進用の発進坑口Ｈも所要位置に
同時に形成できて（従来のものは製造後該穿孔する）安
価であり、分割により軽量なため狭隘地への搬入も容易
で、小型クレーンで施工でき騒音公害も軽減することが
でき、底部用の沈設ブロックＢ１は内面が平面であるた
め推進機の反力を均等に受けることができ強度的にも有
利である。Further, if the sunk block shown in FIG. 11 is applied, the starting wellhead H for propulsion can be formed at the required position at the same time at the required position (the conventional one drills the hole after manufacturing), and is inexpensive. Because of the light weight of the division, it is easy to carry it into confined areas, it can be constructed with a small crane and noise pollution can be reduced, and the sinking block B1 for the bottom part receives the reaction force of the propulsion device evenly because the inner surface is flat. It is also advantageous in strength.

【００３１】以上述べたマンホール兼推進用沈設立坑の
構築工法及びそれに用いる沈降制御装置を適用すれば、
マンホール兼推進用沈設立坑の構築に際し、道路占用幅
・騒音公害・トータルコスト等を軽減することができ
る。By applying the above-described construction method of the manhole / propulsion sinking pit and the sinking control device used therefor,
When constructing a manhole / propulsion sinking pit, the road occupation width, noise pollution, and total cost can be reduced.

【００３２】[0032]

【実施例】図１乃至図１１は、本発明の実施例を示すも
ので、図１は、本発明の請求項１に係る構築工法の第１
工程を示す斜視図、図２は、本発明の請求項１に係る構
築工法の第２工程初期を示す斜視図、図３は、本発明の
請求項１に係るセンタリング装置の斜視図、図４は、本
発明の請求項１に係る構築工法の第２工程を示す斜視
図、図５は、本発明の請求項１に係る構築工法の第３，
第４工程を示す斜視図、図６は、本発明の請求項１に係
る構築工法の第５工程を示す断面図、図７は、本発明の
請求項３に係る過沈下防止装置の斜視図、図８は、本発
明の請求項４に係る実施例を示す断面図、図９は、本発
明の請求項５に係る沈降制御装置の分解斜視図、図１０
は、本発明の請求項６に係る沈降制御装置の要部の分解
斜視図、図１１は、本発明のマンホール兼推進用沈設立
坑の構築工法に用いる沈設ブロックの斜視図である。1 to 11 show an embodiment of the present invention. FIG. 1 shows a first embodiment of a construction method according to claim 1 of the present invention.
FIG. 2 is a perspective view showing an initial stage of a second step of the construction method according to claim 1 of the present invention. FIG. 3 is a perspective view of a centering device according to claim 1 of the present invention. Is a perspective view showing a second step of the construction method according to claim 1 of the present invention, and FIG. 5 is a third step of the construction method according to claim 1 of the present invention.
FIG. 6 is a perspective view showing the fourth step, FIG. 6 is a cross-sectional view showing the fifth step of the construction method according to claim 1 of the present invention, and FIG. 7 is a perspective view of the apparatus for preventing excessive sinking according to claim 3 of the present invention. 8 is a sectional view showing an embodiment according to claim 4 of the present invention, FIG. 9 is an exploded perspective view of a settling control device according to claim 5 of the present invention, FIG.
Fig. 11 is an exploded perspective view of a main part of the sedimentation control device according to claim 6 of the present invention .
It is a perspective view of the sunk block used for the construction method of a pit .

【００３３】以下、図１乃至図６により請求項１に係る
マンホール兼推進用沈設立坑の構築工法の実施例を各工
程順に説明する。An embodiment of the method for constructing a manhole / propulsion sinking pit according to claim 1 will be described in the order of each step with reference to FIGS.

【００３４】図１は、本発明の構築工法の第１工程を示
す斜視図で、構築予定地に階段状の浅い第１底面５（こ
の上に工事終了後通行のため覆工板を設置する）と深い
第２底面１０（立坑構築の基準面となる）を何れも水平
に掘削して所定深さの掘削穴１５を設け、角鋼管・他の
鋼材・樹脂含浸木材等で所定寸法に構成した上部受枠２
０と下部受枠２２を所定間隔離して分離可能に螺着し設
けて第２底面１０上に載置し、上部受枠２０と下部受枠
２２の外周面をガイドとして簡易鋼矢板３０を当接して
打ち込んで周設し、簡易鋼矢板３０外側の空間にコンク
リート４０を打設し、同時または後工程でセンタリング
・沈降制御・過沈下防止等に使用する所要数のアンカー
ボルト２５を埋設し第１工程を終了する。FIG. 1 is a perspective view showing a first step of the construction method according to the present invention. A step-like shallow first bottom surface 5 (on which a lining plate is placed on the first bottom surface 5 for the passage after the construction is completed) is to be constructed. ) And the deep second bottom surface 10 (which serves as a reference surface for vertical shaft construction) are both horizontally excavated to provide an excavation hole 15 having a predetermined depth, and are configured to have predetermined dimensions using square steel pipes, other steel materials, resin-impregnated wood, and the like. Upper receiving frame 2
0 and the lower receiving frame 22 are separated and screwed so as to be separable and placed on the second bottom surface 10, and the simple steel sheet pile 30 is driven into contact with the outer peripheral surfaces of the upper receiving frame 20 and the lower receiving frame 22 as guides. The concrete 40 is cast in the space outside the simple steel sheet pile 30 and the required number of anchor bolts 25 used for centering, settling control, prevention of excessive sinking, etc. are buried at the same time or in the subsequent step, and the first step is performed. finish.

【００３５】図２は、本発明の構築工法の第２工程の初
期を示す斜視図で、前工程で打設したコンクリート４０
の硬化後、上部受枠２０と下部受枠２２を解体して撤去
し、簡易鋼矢板３０も抜去して両受枠２０，２２と同一
寸法の作業空間を得る。次に、底面１０上の所定位置に
刃口部Ｂ０を吊り降ろし、該刃口部Ｂ０上に分割して製
造した片方の底部用の沈設ブロックＢ１ａを吊り降ろ
し、次いで、もう一方の底部用の沈設ブロックＢ１ｂを
吊り降ろして両ブロックＢ１ａ，Ｂ１ｂを接合して一体
化したＢ１と刃口部Ｂ０と連結する。次に、沈設ブロッ
クＢ１上に上段用の分割して製造した沈設ブロックＢ２
ｂを吊り降ろし、次に、もう一方の沈設ブロックＢ２ａ
を吊り降ろして両ブロックＢ２ｂ，Ｂ２ａを接合して一
体化したＢ２と前記底部用の沈設ブロックＢ１と連結し
た後、次に述べるセンタリング装置５０（図３参照）を
前記第１底面５上のアンカーボルト２５にセットする。
なお、吊り上げ時には図２右上に断面で示す接続金具５
７の曲がり防止のため、背面側にガード金具５７ｇまた
は角材５７ｗ（シャックル下に）を当着するのが好まし
い。FIG. 2 is a perspective view showing the initial stage of the second step of the construction method according to the present invention.
After hardening, the upper receiving frame 20 and the lower receiving frame 22 are disassembled and removed, and the simple steel sheet pile 30 is also removed to obtain a work space having the same dimensions as the both receiving frames 20 and 22. Next, the blade opening B0 is hung at a predetermined position on the bottom surface 10, and one of the settling blocks B1a for the bottom manufactured by being divided on the blade opening B0 is hung, and then the other bottom bottom block B1a is hung. The submerged block B1b is hung down, and the blocks B1a and B1b are joined and connected to the integrated B1 and the blade opening B0. Next, on the sunk block B1, the sunk block B2 manufactured separately for the upper stage
b, and then the other sunk block B2a
And the two blocks B2b and B2a are joined to connect the integrated block B2 and the sunk block B1 for the bottom portion. Then, a centering device 50 (see FIG. 3) described below is connected to the anchor on the first bottom surface 5. Set it on the bolt 25.
At the time of lifting, the connection fitting 5 shown in a cross section at the upper right of FIG.
In order to prevent the bend 7, it is preferable to abut a guard fitting 57 g or a square bar 57 w (under the shackle) on the back side.

【００３６】図３は、本発明の請求項１に係るセンタリ
ング装置の斜視図で、第２工程の沈降作業の初期段階か
ら沈設ブロックＢ１，Ｂ２の外周に当接して移動量・傾
斜量等を確認し適正位置に修正するため、第１底面５の
アンカーボルト２５に前後動可能に固着する。センタリ
ング装置５０は、前記アンカーボルト２５に遊挿可能な
挿通孔を設けガイド５１ｇを上部に設け後部に押しボル
ト５１ｂを螺嵌して設けた固定板５１に、先端部にロー
ラ５３を枢着して前記ガイド５１ｂに摺動して前後動可
能に嵌挿し上部に押さえ板５４を重ね前記アンカーボル
ト２５に固着し設けている。また、前記可動部材５２に
代えて図下部に示すスペーサ５８を設けた可動部材５５
を設けてセンタリングを行うこともできる、このセンタ
リング装置の装着により以後の工程を効率よく円滑に行
うことができる。FIG. 3 is a perspective view of the centering device according to the first aspect of the present invention. The centering device contacts the outer periphery of the sunk blocks B1 and B2 from the initial stage of the settling operation in the second step, and determines the amount of movement and inclination. In order to confirm and correct the position, it is fixed to the anchor bolt 25 on the first bottom surface 5 so as to be movable back and forth. The centering device 50 has a guide plate 51g provided at an upper portion thereof, a guide plate 51g provided at an upper portion thereof, a push bolt 51b screwed at a rear portion thereof, and a roller 53 at a distal end portion. The guide plate 51b is slidably fitted in the guide 51b so as to be able to move back and forth, and a holding plate 54 is provided on the upper portion and fixed to the anchor bolt 25. A movable member 55 provided with a spacer 58 shown in the lower part of the figure instead of the movable member 52
The following steps can be performed efficiently and smoothly by mounting the centering device.

【００３７】図４は、本発明の構築工法の第２工程（後
期）を示す斜視図で、前図で説明したセンタリング装置
５０のローラ５３またはスペーサ５８を沈設ブロックの
外周面に当接させて押しボルト５１ｂを調整し、傾斜・
移動等適正位置を確認しながら底部用の沈設ブロック内
の底面をクラムセル・人力等で掘削・排土し、刃口部Ｂ
０が土中に嵌入した時点で地山と沈設ブロック間に、導
管Ｐ１から所定時間後に硬化する遅硬性減摩剤Ｄを圧送
し、刃口部Ｂ０の反力及び沈設ブロックの周面摩擦を軽
減し沈降を円滑にし、前記手順を反復して所定段数の上
段の沈設ブロックＢ２を載置連結して底面を掘削し、最
上段の沈設ブロックが第１底面５上に所定寸法露出する
（連結作業可能な）位置まで沈降させている。FIG. 4 is a perspective view showing a second step (late stage) of the construction method according to the present invention, in which the roller 53 or the spacer 58 of the centering device 50 described in the preceding figure is brought into contact with the outer peripheral surface of the submerged block. Adjust the push bolt 51b,
While checking the proper position for movement, etc., the bottom inside the sunk block for the bottom is excavated and excavated with a crumb cell, human power, etc.
When 0 is inserted into the soil, a slow-hardening lubricant D, which hardens after a predetermined time from the pipe P1, is pumped between the ground and the sunk block to reduce the reaction force of the blade opening B0 and the peripheral friction of the sunk block. The above steps are repeated to place and connect a predetermined number of upper sunk blocks B2 to excavate the bottom surface, and the uppermost sunk blocks are exposed on the first bottom surface 5 by a predetermined size (connection). It has settled to a position where it can be operated.

【００３８】図５は、本発明の構築工法の第３，第４工
程を示す斜視図で、沈降作業が最終段階に近づくため、
所定深度への正確な着底と工程中の不意の過沈下を防止
する沈降制御装置１３０を設置した状態を示している。
沈降制御装置１３０は、反力受基部１１０を前記アンカ
ーボルト２５に固着し、反力受基部１１０の立脚面１０
９に所定長さのガイド軌条１１５を所要寸法上部に突出
させて垂設し、該ガイド軌条１１５に摺動且つ着脱自在
なブラケット１１６を所定位置の係合穴１０４に固定ピ
ン１０５を挿通して係合し、ブラケット１１６の連結部
に押圧シリンダ１２０を垂設し、前記上段ブロックの上
面を押圧可能に設け、過沈下防止のため沈設ブロックＢ
２に連結した螺杆８６をブラケット１１６の螺杆挿通孔
９６に挿通して停止ナット８７を所定寸法上方に螺嵌
し、前記刃口部Ｂ０の反力と沈設ブロックの周面摩擦を
軽減するため、前記導管Ｐ１から所定量の遅硬性減摩材
Ｄ（所定時間後に硬化する）を圧入し、流体加圧により
押圧シリンダ１２０を作動させ沈降を制御しながら内部
底面の土砂を掘削排土し、必要に応じ更に所定数の上段
ブロックを前記同様に連結し、前記押圧シリンダ１２０
の作動と過沈下防止用の停止ナット８７を調整しながら
所定深度まで沈降させて第３工程を終了する。FIG. 5 is a perspective view showing the third and fourth steps of the construction method according to the present invention.
The figure shows a state in which a settling control device 130 is installed, which is capable of accurately landing at a predetermined depth and preventing unexpected oversinking during the process.
The sedimentation control device 130 fixes the reaction force receiving base 110 to the anchor bolt 25, and
9, a guide rail 115 of a predetermined length is vertically protruded upward from a predetermined dimension, and a bracket 116 slidably and detachably inserted through the guide rail 115 and a fixing pin 105 is inserted into an engagement hole 104 at a predetermined position. Engaging, a pressing cylinder 120 is erected at the connecting portion of the bracket 116, and the upper surface of the upper block is provided so as to be pressable.
In order to reduce the reaction force of the blade opening B0 and the peripheral surface friction of the sunk block, the screw 86 connected to the screw 2 is inserted through the screw insertion hole 96 of the bracket 116 and the stop nut 87 is screwed upward by a predetermined dimension. A predetermined amount of the slow-hardening lubricating material D (hardened after a predetermined time) is press-fitted from the conduit P1, and the pressurizing cylinder 120 is actuated by fluid pressurization to control sedimentation to excavate and discharge earth and sand on the inner bottom surface. A predetermined number of upper blocks are further connected in the same manner as described above, and
The operation is adjusted and the stop nut 87 for preventing excessive settlement is settled down to a predetermined depth, and the third step is completed.

【００３９】次の第４工程では、沈降制御装置１３０の
ブラケット１１６を下方に降下させて上面ＢＴを押圧し
ながら内部底面の土砂を掘削排土し、第４工程終了時に
は最上段の沈設ブロックを二点鎖線ＢＴ’位置迄沈降着
底させる、次に、底部のスライム中に凝集剤投入後水及
び分離した凝集物を排除した後セメント系固化材ｃｋを
投入して底部の土質を改善し、セメント系固化材ｃｋ
（図６参照）の硬化後底詰コンクリートＣを打設し、底
詰コンクリートの硬化後内部を排水し、前記沈降制御装
置１３０と過沈下防止用螺杆８６及びセンタリング装置
５０等を撤去し、残余空隙部Ｇに遅硬性減摩材Ｄを圧入
充填し第４工程を終了する。In the next fourth step, the bracket 116 of the sedimentation control device 130 is lowered to excavate and remove the earth and sand on the inner bottom surface while pressing the upper surface BT. At the end of the fourth step, the uppermost sunk block is removed. Settle down to the position of the two-dot chain line BT ', and then remove the water and separated aggregates into the slime at the bottom after removing water and separated aggregates, and then add the cement-based solidifying material ck to improve the soil at the bottom, Cement-based solidification material ck
After the hardening of the concrete (see FIG. 6), the inside of the hardened concrete is poured, the inside of the hardened concrete is drained, and the sedimentation control device 130, the screw 86 for preventing excessive subsidence, the centering device 50, and the like are removed. The gap G is press-filled with the slow-hardening lubricating material D, and the fourth step is completed.

【００４０】次に、前記底部用の沈設ブロックＢ１内側
の推進管発進坑口Ｈ（到達坑口にもなる）から管渠（推
進管Ｓ）の推進工程を行う。Next, a propulsion process of the culvert (propulsion pipe S) is performed from the propulsion pipe starting port H (also serving as a reaching port) inside the bottom sunk block B1.

【００４１】図６は、本発明の構築工法の第５工程を示
す断面図で（推進管Ｓの推進工程終了後）、沈設ブロッ
ク上部に開口部を偏心して設けた中間床版ブロックＦを
載置連結し、該中間床版ブロックＦ上に既知のマンホー
ルＭを載置し、コンクリート４０を撤去し前記掘削孔１
５の空間部を埋戻して第５工程を終了し、図示しない昇
降用のステップ・その他付属品等を装着する。FIG. 6 is a cross-sectional view showing the fifth step of the construction method according to the present invention (after the propulsion step of the propulsion pipe S is completed), in which an intermediate slab block F having an opening eccentrically provided above the sinking block is mounted. A known manhole M is placed on the intermediate floor slab block F, the concrete 40 is removed, and the excavation hole 1 is removed.
The space of No. 5 is backfilled to complete the fifth step, and unillustrated elevating steps and other accessories are mounted.

【００４２】図７は、本発明の請求項３に係る過沈下防
止装置９０を示す斜視図で、過沈下防止装置９０は前記
第３，第４工程で使用した沈降制御装置１３０に代わる
もので、第１底面５のコンクリート４０に埋設したアン
カーボルト２５に、過沈下防止基部９７を固着し、過沈
下防止基部９７の螺杆挿通孔９６に過沈下防止用の螺杆
８６を遊挿し、該螺杆８６の下端を最上段の沈設ブロッ
クに連結した連結金具５７上部の螺杆連結部５６に螺嵌
し、螺杆挿通孔９６から上方へ突出した螺杆８６の所要
位置に停止ナット８７を螺嵌した過沈下防止装置９０を
設けている。FIG. 7 is a perspective view showing an over-sinking prevention device 90 according to a third embodiment of the present invention. The over-sinking prevention device 90 replaces the settling control device 130 used in the third and fourth steps. The excessive sinking prevention base 97 is fixed to the anchor bolt 25 buried in the concrete 40 on the first bottom surface 5, and the screw 86 for preventing excessive sinking is loosely inserted into the screw insertion hole 96 of the excessive settlement preventing base 97, and the screw 86 The lower end of the screw is screwed into the screw connecting portion 56 on the upper part of the connecting fitting 57 connected to the uppermost sunk block, and the stop nut 87 is screwed into a required position of the screw 86 protruding upward from the screw insertion hole 96 to prevent excessive sinking. An apparatus 90 is provided.

【００４３】図８は、本発明の請求項４に係る実施例を
示す断面図で、沈設ブロックの刃口部Ｂ０近傍を部分的
に示している。構築工法の第２乃至第４工程において立
坑内に湧水が有って、刃口部Ｂ０内側底部の掘削状態が
視認困難な場合、または、クラムセル等の掘削機で掘削
困難な場合の刃口落としに使用する導管Ｐ２であって、
適所に操作弁Ｖを設け深度目盛ｍを表示した導管Ｐ２を
設け、該導管Ｐ２の下端に所要長さの水平部ｐｈを逆Ｔ
形に連結して設け、水平部ｐｈに複数の細孔Ｎを穿設
し、該導管Ｐ２に圧搾空気を圧送し、深度目盛と触感で
沈降深度を確認しながら前記刃口部Ｂ０内側の土砂を崩
壊（刃口落とし）可能に設けている。なお、図中の符号
Ｄは地山との空隙部Ｇに充填した遅硬性減摩材Ｄであ
る。FIG. 8 is a sectional view showing an embodiment according to claim 4 of the present invention, and partially shows the vicinity of a blade opening B0 of a submerged block. In the second to fourth steps of the construction method, when there is spring water in the shaft and it is difficult to visually confirm the excavation state of the inner bottom portion of the blade portion B0, or in the case where it is difficult to excavate with an excavator such as a clam cell. A conduit P2 used for dropping,
An operation valve V is provided at an appropriate position, a conduit P2 indicating a depth scale m is provided, and a horizontal portion ph of a required length is inverted T at the lower end of the conduit P2.
A plurality of pores N are drilled in the horizontal portion ph, compressed air is pumped into the conduit P2, and the sediment inside the blade opening B0 is checked while confirming the sedimentation depth by depth scale and tactile sensation. Is provided so that it can be collapsed (dropping the blade). In addition, the code | symbol D in a figure is the slow-hardening lubrication material D filled in the space | gap G with the ground.

【００４４】図９は、本発明の請求項５に係る沈降制御
装置の分解斜視図で、沈降制御装置１３０は、第１底面
５に埋設した前記アンカーボルト２５に固着可能な反力
受部材１１０に立脚部１０９を設け、該立脚部１０９
に、長手方向の所定位置に複数の係止孔１０４を設けた
ガイド軌条１１５を所要寸法上部に突出して螺着し、ガ
イド軌条１１５に摺動可能且つ係止孔１０４部に固定ピ
ン１０５を挿通して係止可能に設けたブラケット１１６
を設け、該ブラケット１１６下面に一端を連結し他端に
押圧部１１９を設けた押圧シリンダ１２０を設け、過沈
下防止のため沈設ブロックに連結した螺杆８６を前記ブ
ラケット１１６の螺杆挿通孔９６に挿通し上部に停止ナ
ット８７を調整可能に螺嵌し設けている。なお、螺杆８
６の符号ｍは深度目盛りｍであり、前記押圧部１１９は
図下部に示す螺杆連結部５６を設けた接続金具５７を避
けて上面ＢＴを押圧するため外側を切欠している。FIG. 9 is an exploded perspective view of a settling control device according to a fifth embodiment of the present invention. The settling control device 130 includes a reaction force receiving member 110 that can be fixed to the anchor bolt 25 embedded in the first bottom surface 5. A standing part 109 is provided on the standing part 109.
A guide rail 115 provided with a plurality of locking holes 104 at predetermined positions in the longitudinal direction is projected and screwed to an upper part of a required dimension, and is slidable on the guide rail 115 and a fixing pin 105 is inserted into the locking hole 104. Bracket 116 provided so as to be locked
A pressing cylinder 120 having one end connected to the lower surface of the bracket 116 and a pressing portion 119 provided at the other end is provided, and a screw 86 connected to a sunk block for preventing excessive sinking is inserted into a screw insertion hole 96 of the bracket 116. A stop nut 87 is screw-fitted and provided on the upper part. The screw 8
The symbol m of 6 is a depth scale m, and the pressing portion 119 is notched on the outside to press the upper surface BT while avoiding the connection fitting 57 provided with the screw connection portion 56 shown in the lower part of the figure.

【００４５】図１０は、本発明の請求項６に係る沈降制
御装置の要部の分解斜視図で、沈降制御装置１３０のガ
イド軌条１１５Ｂにラック状の歯合部１１４を設けると
共に、該ガイド軌条１１５に摺動可能に係合させたブラ
ケット１１６Ｂを設け、該ブラケット１１６Ｂ内に下降
時のみ遊動するラチェット１２２をスプリングＳＰによ
り前記歯合部１１４に常時歯合可能に付勢して設け、押
圧シリンダ１２０の縮退時に該ブラケット１１６Ｂが１
ストローク分自動的に降下可能に設け、ラチェット１２
２にハンドル１２２ｈを設け、ハンドル１２２ｈを押し
下げ開放ピン１２２ｐを挿通孔ｏｆに挿通すればラチェ
ット１２２の歯合を解除可能に設け、ブラケット１１６
Ｂに垂設した押圧シリンダ１２０下部の押圧部１１９に
は、沈設ブロックに係止させるための固定ボルト１１９
ｂを設けている。なお、押圧シリンダ１２０は複動形が
好ましく、単動形の押圧シリンダの場合プランジャとシ
リンダ間・ブラケット１１６Ｂと押圧部１１９間に収縮
用の図示しない引張りスプリングを介在させる・または
スプリング内蔵のシリンダを用いてもよい。なお、図中
の１１０ｂはガイド軌条１１５の固定ボルト１１０ｂで
あり、１１６ｐはブラケット１１６Ｂの固定ピン１１６
ｐである。FIG. 10 is an exploded perspective view of a main part of a sedimentation control device according to a sixth aspect of the present invention. A rack-shaped toothed portion 114 is provided on a guide rail 115B of the sedimentation control device 130 and the guide rail is provided. A bracket 116B slidably engaged with the bracket 115 is provided, and a ratchet 122 that moves only when the bracket 116B descends is provided in the bracket 116B by a spring SP such that the ratchet 122 is always urged to the meshing portion 114 so as to be meshable. When the bracket 120 is retracted,
It is provided to be able to descend automatically by the stroke, and the ratchet 12
2, a handle 122h is provided, and if the handle 122h is pushed down and the release pin 122p is inserted through the insertion hole of, the engagement of the ratchet 122 is releasably provided.
A fixing bolt 119 for locking to a sunk block is provided on a pressing portion 119 at a lower portion of the pressing cylinder 120 which is vertically provided on B.
b is provided. The pressing cylinder 120 is preferably of a double-acting type. In the case of a single-acting pressing cylinder, a tension spring (not shown) for contraction is interposed between the plunger and the cylinder, between the bracket 116B and the pressing portion 119, or a cylinder with a built-in spring is used. May be used. In the drawing, 110b is a fixing bolt 110b of the guide rail 115, and 116p is a fixing pin 116 of the bracket 116B.
p.

【００４６】図１１は、本発明のマンホール兼推進用沈
設立坑に使用する沈設ブロックで、鋼板で形成し内部に
コンクリートを充填した縦断面三角形（内側が傾斜し
た）で隅部にアールを付けた長方形の刃口部Ｂ０を設
け、該刃口部Ｂ０上部にパッキンｐａを周設し、打設時
に推進管発進（到達）坑口Ｈを同時形成すると共に、縦
方向に分割して製造した後一体に結合し上下連結可能に
設けた底部用の沈設ブロックＢ１を前記刃口部Ｂ０上部
のパッキンｐａ内側に固着し、該底部用の沈設ブロック
Ｂ１と同様に縦方向に分割して製造した後一体に結合し
上下連結可能に設けた所要段数の上段用の沈設ブロック
Ｂ２を、縦方向の分割連結部を交互に位置するよう載置
封着して接続し、最上段の沈設ブロックＢ２上に偏心し
て開口部Ｋを設けた中間床版ブロックＦを載置封着して
接続し構成している。FIG. 11 shows a submerged block used for a manhole / propulsion sinking pit according to the present invention , which is formed by a steel plate and filled with concrete and has a longitudinally triangular cross section (the inside is inclined) with rounded corners. After forming a rectangular cutout B0, a packing pa is provided around the cutout B0, and a propulsion tube starting (reaching) well H is simultaneously formed at the time of casting, and is manufactured by being divided vertically. A bottom sunk block B1 which is integrally connected and vertically connectable is fixed to the inside of the packing pa above the blade opening B0, and is manufactured by being divided in the vertical direction in the same manner as the sunk block B1 for the bottom. A required number of upper set-down blocks B2 integrally connected and provided in a vertically connectable manner are placed and sealed so as to alternately position the vertically divided connecting portions, and are connected to the uppermost set-up block B2. Eccentrically with opening K Slab Block F the placing 置封 wear to constitute connected.

【００４７】また、図中の符号ｐは封着用のパッキンｐ
で上下連結用の接続金具５７を設け、最上段の接続金具
５７には過沈下防止用の螺杆８６の螺杆連結部５６を設
け、底部用の沈設ブロックＢ１の推進管発進（到達）坑
口Ｈには推進工程時に内側から切欠可能な厚ゴム製のカ
バーＣＶを沈降に支障がないよう面一に装着している。
なお、図では推進機の反力を均等に受けるよう平面で形
成した長方形断面の沈設ブロックＢ１，Ｂ２等を示した
が、本発明の思想を逸脱しない範囲において他の形状等
変更を加えることは自由である。The symbol p in the figure is a packing p for sealing.
The connection fitting 57 for vertical connection is provided at the top, and the connection fitting 56 of the screw 86 for preventing excessive sinking is provided at the top connection fitting 57, and the propulsion pipe start (reach) wellhead H of the sinking block B1 for bottom is provided. Has a thick rubber cover CV that can be cut out from the inside during the propulsion process, and is mounted flush so as not to hinder sedimentation.
In the drawings, the sunk blocks B1, B2, etc. having a rectangular cross section formed in a plane so as to receive the reaction force of the propulsion device evenly are shown. However, other shapes and the like may be changed without departing from the spirit of the present invention. Be free.

【００４８】[0048]

【発明の効果】請求項１に係るマンホール兼推進用沈設
立坑の構築工法では、立坑構築の第１工程で分離可能な
上部受枠と下部受枠を用い、両受枠をガイドとして簡易
鋼矢板を垂直に打ち込むことができ、地下水位が高い場
合・一時的に自立しにくい地盤の山止めも可能で、以後
の工程が容易になると共に後工程で使用するアンカーボ
ルトを堅固に埋設でき、第２工程の初期でコンクリート
硬化後前記両受枠と簡易鋼矢板を撤去するので、第２底
面の所定位置への刃口部の設置は容易であり、分割した
沈設ブロックは軽量なため扱いが簡単で小型クレーンで
容易に載置でき、内面からコッターまたはボルト結合に
より容易に一体化でき、前記刃口部との連結も容易にで
きる。また、前記アンカーボルトと沈設ブロック間に介
在させたセンタリング装置またはセンタリングスペーサ
により、沈降時の傾斜・移動量等適正位置を視認しなが
ら初期段階で修正することができる。According to the construction method of the present invention, an upper receiving frame and a lower receiving frame that can be separated in the first step of the vertical shaft construction are used, and the simple steel sheet pile is vertically moved using both receiving frames as guides. Can be driven into the ground, and when the groundwater level is high, it is possible to temporarily prevent the ground from being self-sustained temporarily. This makes it easy to perform the subsequent steps and firmly embeds the anchor bolts used in the subsequent steps. After the concrete is hardened in the early stage of the above, the both receiving frames and the simple steel sheet pile are removed, so the installation of the cutting edge at a predetermined position on the second bottom surface is easy. And can be easily integrated from the inner surface by cotter or bolt connection, and can be easily connected to the blade port. In addition, the centering device or the centering spacer interposed between the anchor bolt and the sunk block allows correction at an initial stage while visually confirming an appropriate position such as inclination and movement amount at the time of settlement.

【００４９】また、第２工程の後期では、所要段数の沈
設ブロックを載置し掘削と沈降を反復し所要数の沈設ブ
ロックを前記センタリング装置等により傾斜量・移動量
等を修正しながら水平に沈降させることができ、第３，
第４工程では、最上段の沈設ブロックに過沈下防止用の
螺杆を連結してブラケットに挿通し、過沈下の許容範囲
内の上位置に停止ナットを螺嵌しているので、不意の過
沈下を許容範囲内に留めることができ、大型クレーンに
よる再度の引き上げ・過度の傾斜等修復が困難且つ高価
になる施工の失敗と作業員への危険を未然に防止するこ
とができる。In the latter half of the second step, the required number of sunk blocks are placed, and excavation and settlement are repeated, and the required number of sunk blocks are horizontally adjusted while correcting the inclination amount and movement amount by the centering device or the like. Can settle, the third
In the fourth step, a screw for preventing excessive sinking is connected to the uppermost sunk block and inserted into the bracket, and a stop nut is screwed into an upper position within the allowable range of excessive sinking, so that unexpected excessive sinking occurs. Can be kept within an allowable range, and it is possible to prevent the failure of construction and the danger to the operator, which are difficult and expensive to repair again, such as lifting up and excessive inclination by a large crane.

【００５０】沈降の最終段階では慎重な掘削沈降が要求
されるが、沈降制御装置のガイド軌条にブラケットを介
して連結された押圧シリンダにより沈降ブロックの周面
摩擦・刃口部の反力以上の押圧を制御しながら容易に行
え、前記過沈下防止の停止ナットの螺入位置の調整によ
り所定の沈降を確認しながら制御をすることができる、
沈設ブロックの着底後底面の処理をした後底詰コンクリ
ートを打設するので、着底した沈設ブロックに安定した
支持力を与えることができ、最低の占用面積でマンホー
ル兼推進立坑を短時間で構築できトータルコストを軽減
することができる。In the final stage of sedimentation, careful excavation and sedimentation is required. However, the pressing cylinder connected to the guide rail of the sedimentation control device via a bracket exceeds the friction of the peripheral surface of the sedimentation block and the reaction force of the cutting edge. It is easy to perform while controlling the pressing, and it is possible to control while confirming a predetermined subsidence by adjusting the screwing position of the stop nut for preventing the excessive subsidence,
After the bottom of the submerged block is set, the bottom is treated and the bottom is filled with concrete, so that a stable supporting force can be given to the submerged block and the manhole / propulsion shaft can be installed in a short time with the minimum occupied area. It can be constructed and the total cost can be reduced.

【００５１】また、請求項２記載の第２工程では、外部
（掘削穴外または製造工場）において一体化した底部用
の沈設ブロックと上段用の沈設ブロックを使用して構築
するので、施工時間を更に短縮できる。Further, in the second step of the present invention, since the construction is performed by using the bottom sunk block and the upper sunk block integrated outside (outside of the excavation hole or the manufacturing plant), the construction time is reduced. It can be further shortened.

【００５２】また、請求項３に係るものは、請求項１記
載の第３工程において、前記沈降制御装置のブラケット
に挿通していた過沈下防止用の螺杆を、別に設けたアン
カーボルトに固着した過沈下防止基部に穿設した螺杆挿
通孔に挿通し、過沈下の許容範囲上部に停止ナットを螺
嵌した過沈下防止用の螺杆を最上段の沈設ブロックに連
結し、螺杆挿通孔から上方へ突出した螺杆の所要位置に
停止ナットを螺嵌しているので、前記沈降制御装置と同
様に過沈下防止をすることができる。According to a third aspect of the present invention, in the third step of the first aspect, a screw for preventing excessive sinking, which has been inserted through the bracket of the sinking control device, is fixed to an anchor bolt provided separately. Insert the screw into the screw insertion hole formed in the base for preventing excessive sinking, connect the screw for preventing excessive sinking with the stop nut screwed into the upper part of the allowable range of excessive sinking to the uppermost sunk block, and upward from the screw insertion hole. since the screwed a stop nut to the required position of the protruding threaded rod, it can be excessive subsidence preventing the sedimentation controller same <br/> like.

【００５３】また、構築工法の第２乃至第４工程におい
て、湧水により底部の掘削状態が視認困難な場合、深度
目盛を表示した導管の下端に複数の細孔を穿設した所要
長さの水平部を逆Ｔ形に連結して設けているので、該導
管に圧搾空気を圧送すれば、沈降深度を深度目盛と触感
で確認しながら前記刃口部内側の土砂の刃口落としが短
時間で容易に行え過度の深掘りを防止することができ
る。In the second to fourth steps of the construction method, when the bottom excavation state is difficult to be visually recognized due to spring water, a required length having a plurality of pores formed at the lower end of the conduit displaying the depth scale is provided. Since the horizontal portion is connected in an inverted T-shape, if compressed air is pumped into the conduit, it is possible to quickly remove the sediment from the inside of the blade portion while checking the sedimentation depth with the depth scale and tactile sensation. And can prevent excessive deep digging.

【００５４】また、請求項５に係る沈降制御装置は、ア
ンカーボルトに固着した反力受部材により、押圧シリン
ダによる反力と過沈下防止時の荷重等を吸収できるた
め、過度の傾斜・沈降等による施工の失敗・作業員への
危険を未然に防止し、修正のため重機による再度の引上
げ等煩雑な作業を回避することができる。Further, in the settlement control device according to the fifth aspect, since the reaction force receiving member fixed to the anchor bolt can absorb the reaction force of the pressing cylinder and the load at the time of preventing excessive settlement, excessive inclination and settlement can be achieved. This can prevent the failure of construction and the danger to workers beforehand, and can avoid complicated work such as re-pulling by heavy equipment for correction.

【００５５】また、請求項６に係る沈降制御装置は、押
圧シリンダの縮退時に縮退ストローク分ブラケットが自
動的に降下するため、ブラケットの取付け位置をその都
度変更する手間が省け、省力化と時間短縮することがで
きる。Further, in the sedimentation control device according to the sixth aspect, when the pressing cylinder is retracted, the bracket is automatically lowered by the retracting stroke, so that it is not necessary to change the mounting position of the bracket each time, thereby saving labor and time. can do.

【００５６】更に、図１１に示す沈設ブロックを適用す
れば、分割して製造し推進用の発進坑口も同時に形成す
るため安価であり、分割により軽量なため狭隘地への搬
入も容易で、小型クレーンで施工でき騒音公害も軽減す
ることができる。Further, if the sunk block shown in FIG. 11 is applied, it is inexpensive because it is divided and manufactured and a starting port for propulsion is also formed at the same time. It can be constructed with a crane and can reduce noise pollution.

【００５７】以上述べたマンホール兼推進用沈設立坑の
構築工法及びそれに用いる沈降制御装置を適用すれば、
マンホール兼推進用沈設立坑の構築に際し、道路占用幅
・騒音公害・トータルコスト等を軽減でき、作業効率の
向上を計ることができる効果がある。刃口落としのため
流体管路を刃口部に内設した遠心力成形の沈設ブロック
に比較し安価なキャステング成形の沈設ブロックを使用
することができる。By applying the above-described method of constructing the manhole / propulsion sinking pit and the sinking control device used therefor,
In the construction of the manhole / propulsion pit, the width of road occupation, noise pollution, total cost, etc. can be reduced, and the work efficiency can be improved. In order to remove the blade port, it is possible to use an inexpensive cast-molding submersible block as compared with a centrifugal force-forming submerged block in which a fluid conduit is provided inside the blade port.

【図面の簡単な説明】[Brief description of the drawings]

【図１】は、本発明の請求項１に係る構築工法の第１工
程を示す斜視図。FIG. 1 is a perspective view showing a first step of a construction method according to claim 1 of the present invention.

【図２】は、本発明の請求項１に係る構築工法の第２工
程初期を示す斜視図。FIG. 2 is a perspective view showing an initial stage of a second step of the construction method according to claim 1 of the present invention.

【図３】は、本発明の請求項１に係るセンタリング装置
の斜視図。FIG. 3 is a perspective view of a centering device according to claim 1 of the present invention.

【図４】は、本発明の請求項１に係る構築工法の第２工
程を示す斜視図。FIG. 4 is a perspective view showing a second step of the construction method according to claim 1 of the present invention.

【図５】は、本発明の請求項１に係る構築工法の第３，
第４工程を示す斜視図。FIG. 5 is a third view of the construction method according to claim 1 of the present invention.
The perspective view showing a 4th process.

【図６】は、本発明の請求項１に係る構築工法の第５工
程を示す断面図。FIG. 6 is a sectional view showing a fifth step of the construction method according to claim 1 of the present invention.

【図７】は、本発明の請求項３に係る過沈下防止装置の
斜視図。FIG. 7 is a perspective view of an apparatus for preventing oversinking according to a third embodiment of the present invention.

【図８】は、本発明の請求項４に係る実施例を示す断面
図。FIG. 8 is a sectional view showing an embodiment according to claim 4 of the present invention.

【図９】は、本発明の請求項５に係る沈降制御装置の分
解斜視図。FIG. 9 is an exploded perspective view of a sedimentation control device according to claim 5 of the present invention.

【図１０】は、本発明の請求項６に係る沈降制御装置の
要部の分解斜視図。FIG. 10 is an exploded perspective view of a main part of a sedimentation control device according to claim 6 of the present invention.

【図１１】は、本発明のマンホール兼推進用沈設立坑に
使用する沈設ブロックの斜視図。FIG. 11 is a perspective view of a sunk block used in a manhole / propulsion sunk pit according to the present invention .

【符号の説明】[Explanation of symbols]

Ｂ０─刃口部 Ｂ１─底部用の沈設ブロック（Ｂ１ａとＢ１ｂを連結し
た） Ｂ２─上段用の沈設ブロック（Ｂ２ａとＢ２ｂを連結し
た） Ｃ─底詰コンクリート Ｄ─遅硬性減摩材 Ｇ─空隙部 Ｆ─中間床版ブロック Ｍ─既知のマンホール Ｐ１─導管（遅硬性減摩材Ｄ圧送用の） Ｐ２─導管（刃口落としをする圧搾空気の） ５─第１底面（掘削穴の） １０─第２底面（掘削穴の） １５─掘削孔 ２０─上部受枠 ２２─下部受枠 ２５─アンカーボルト ３０─簡易鋼矢板 ４０─コンクリート ５０─センタリング装置 ５０Ｂ─センタリングスペーサ ５３─ローラ ５６─螺杆連結部 ５７─連結金具 ５８─スペーサ ８６─螺杆 ８７─停止ナット ９０─過沈下防止装置 ９７─過沈下防止基部 １０４─係止孔 １１０─反力受部材 １１４─歯合部 １１５─ガイド軌条 １１５Ｂ─ガイド軌条（請求項４に係る） １１６─ブラケット １１６Ｂ─ブラケット（請求項４に係る） １２０─押圧シリンダ １２２─ラチェット １３０─沈降制御装置B0─Blade B1─Sinking block for bottom (B1a and B1b are connected) B2─Sinking block for top (B2a and B2b are connected) C─Bottom concrete D─Slow-hardening lubricant G 材 Void Part F {Intermediate slab block M} Known manhole P1 Conduit (for pumping slow-hardening lubricating material D) P2 Conduit (for compressed air dropping blade) 5 First bottom (for drilling hole) 10 ─Second bottom (of excavation hole) 15─Excavation hole 20─Upper receiving frame 22─Lower receiving frame 25─Anchor bolt 30─Simple steel sheet pile 40─Concrete 50─Centering device 50B─Centering spacer 53─Roller 56─Screw connection 57 {Connection metal fittings 58} Spacer 86} Screw rod 87} Stop nut 90} Oversinking prevention device 97} Oversinking prevention base 104} Engagement hole 110} Reaction force receiving member 114} Toothed portion 1 15─ guide rail 115B─ guide rail (according to claim 4) 116─ bracket 116B─ bracket (according to claim 4) 120─ pressing cylinder 122─ ratchet 130─ sedimentation control device

───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭60−88786（ＪＰ，Ａ) 特開 平７−180160（ＪＰ，Ａ) 特開 昭49−27015（ＪＰ，Ａ) 特開 昭58−143022（ＪＰ，Ａ) 実開 昭49−74031（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.⁷，ＤＢ名) E02D 29/12 E21D 1/00 E21D 9/06 301 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-60-88786 (JP, A) JP-A-7-180160 (JP, A) JP-A-49-27015 (JP, A) JP-A-58-1985 143022 (JP, A) Actually open 49-74031 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) E02D 29/12 E21D 1/00 E21D 9/06 301

Claims (6)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】 予定地を所定深さ掘削して掘削穴を設
け、該掘削穴内に刃口の付いた底部ブロックを吊り降ろ
して、該底部ブロック内面の土砂を掘削して順次上段の
沈設ブロック等を載置連結し最上段の沈設ブロック上面
に開口部を設けた床版ブロックを載置し、該床版ブロッ
ク上にマンホールを載置し床版ブロック上の空隙部を埋
戻すマンホール兼推進用沈設立坑の構築工法において、 階段状に第１底面５と第２底面１０を設けた掘削穴１５
の第２底面１０に、上下に所定間隔離して着脱可能に構
成した上部受枠２０と下部受枠２２を水平に載置し、上
部受枠２０と下部受枠２２の外周面をガイドとして簡易
鋼矢板３０を所要深さ打込んで周設し、簡易鋼矢板３０
外側の空間部にコンクリート４０を打設し、該コンクリ
ート４０に所定数のアンカーボルト２５を突設する第１
工程と、 コンクリート４０硬化後上部受枠２０と下部受枠２２を
撤去して簡易鋼矢板３０を抜去し、第２底面１０の所定
位置に、一体に成形した刃口部Ｂ０を水平に設置し、該
刃口部Ｂ０の上部に縦方向に分割し連結可能に製造した
任意断面形状の底部用の沈設ブロックＢ１ａを吊り降ろ
し、次に同じく縦方向に分割して製造した任意断面形状
の底部用の沈設ブロックＢ１ｂを吊り降ろして連結し一
体化した沈設ブロックＢ１を前記刃口部Ｂ０と連結し、
沈設ブロックＢ１外周と前記アンカーボルト２５間にセ
ンタリング装置５０を介在させ、沈設ブロックＢ１の上
に前記同様に分割して製造した上段の沈設ブロックＢ２
ａ，Ｂ２ｂを吊り降ろして連結し一体化した沈設ブロッ
クＢ２と前記沈設ブロックＢ１を連結し、内部の土砂を
掘削排土し刃口部Ｂ０が地中に嵌入した時点で地表から
刃口部Ｂ０上部に挿入した導管Ｐ１を通じて遅硬性減摩
材Ｄを圧送しながら、更に掘削排土して沈設ブロックＢ
２を第１底面５上に所定寸法露出する位置まで沈降さ
せ、必要に応じ所要段数の沈設ブロックを前記同様連結
し内部を掘削排土して第１底面５上に所定寸法露出する
位置まで沈降させる第２工程と、 次に、過沈下による危険の防止し作業を円滑にするため
の沈降制御装置１３０の反力受基部１１０を前記アンカ
ーボルト２５に固着し、反力受基部１１０の立脚部１０
９に所要長さのガイド軌条１１５を垂設し、該ガイド軌
条１１５に摺動且つ着脱自在なブラケット１１６をガイ
ド軌条１１５の係止孔１０４の所定位置に係止し、ブラ
ケット１１６の連結部１１７に押圧シリンダ１２０を垂
設して前記上段ブロックの上面ＢＴを押圧可能に設け、
最上段の沈設ブロックに連結した過沈下防止用の螺杆８
６を前記ブラケット１１６の螺杆挿通孔９６に遊挿し、
螺杆挿通孔９６から突出した螺杆８６上方の所定位置に
停止ナット８７を螺嵌し、前記導管Ｐ１から所定量の遅
硬性減摩材Ｄを地山と沈設ブロック間の空隙部Ｇに圧入
し、流体加圧により押圧シリンダ１２０を作動させ停止
ナット８７を調整し沈降を制御しながら内部底面の土砂
を掘削排土し所定深度まで沈降着底させる第３工程と、 次に、底部のスライム中に凝集剤投入後水及び分離した
凝集物を排除した後セメント系固化剤を投入し、該セメ
ント系固化剤硬化後底詰コンクリートＣを打設し、底部
コンクリート硬化後排水し、前記沈降制御装置１３０と
過沈下防止用螺杆８６及びセンタリング装置５０を撤去
し、残余空隙部Ｇに遅硬性減摩材Ｄを充填する第４工程
と、 前記底部用の沈設ブロックＢ１内側から管渠の推進工程
を行い、 管渠の推進工程終了後、沈設ブロック上部に開口部を偏
心して設けた中間床版ブロックＦを載置連結し、該中間
床版ブロックＦ上に既知のマンホールＭを載置し、前記
掘削穴１５空間部を埋戻す第５工程から成る、ことを特
徴とするマンホール兼推進用沈設立坑の構築工法。An excavation hole is formed by excavating a predetermined site to a predetermined depth, a bottom block having a cutting edge is hung in the excavation hole, and the earth and sand on the inner surface of the bottom block is excavated to sequentially set up an upper sunk block. Place a floor block with an opening on the top of the uppermost sunk block, place a manhole on the floor slab block, and refill the gap on the floor slab block. In the construction method of the pit, the excavation hole 15 with the first bottom surface 5 and the second bottom surface 10
The upper receiving frame 20 and the lower receiving frame 22 which are detachably arranged vertically separated from each other by a predetermined distance are horizontally placed on the second bottom surface 10, and the simple steel sheet pile 30 is placed using the outer peripheral surfaces of the upper receiving frame 20 and the lower receiving frame 22 as guides. Driving the required depth and piercing it, simple steel sheet pile 30
First, concrete 40 is poured into the outer space, and a predetermined number of anchor bolts 25 are protruded from the concrete 40.
After the hardening of the concrete 40, the upper receiving frame 20 and the lower receiving frame 22 are removed, the simple steel sheet pile 30 is removed, and the integrally formed cutting edge portion B0 is horizontally installed at a predetermined position on the second bottom surface 10; A sinking block B1a for a bottom having an arbitrary cross-sectional shape manufactured vertically and divided so as to be connectable is suspended above the blade opening B0, and then a sink for a bottom having an arbitrary cross-sectional shape manufactured similarly by splitting vertically. Block B1b is hung down and connected, and the integrated sunk block B1 is connected to the blade opening B0,
A centering device 50 is interposed between the outer periphery of the sunk block B1 and the anchor bolt 25, and the upper sunk block B2 divided and manufactured on the sunk block B1 in the same manner as described above.
a, B2b are suspended and connected, and the integrated sunk block B2 and the sunk block B1 are connected to each other. The earth and sand inside the sunk block B1 are excavated and discharged, and when the blade opening B0 is inserted into the ground, the blade opening B0 is cut off from the ground surface. While the slow-hardening lubricating material D is being pumped through the conduit P1 inserted into the upper part, the excavated soil is further removed and the sinking block B
2 is settled to a position where it is exposed to a predetermined size on the first bottom surface 5, and if necessary, the required number of steps of the sunk blocks are connected in the same manner as described above, and the inside is excavated and excavated to settle to a position where the predetermined size is exposed on the first bottom surface 5. And a second step of fixing the reaction force receiving base 110 of the sedimentation control device 130 to the anchor bolt 25 to prevent danger due to excessive sinking and to facilitate the operation. 10
9, a guide rail 115 of a required length is suspended, and a slidable and detachable bracket 116 is locked to the guide rail 115 at a predetermined position of the locking hole 104 of the guide rail 115, and a connecting portion 117 of the bracket 116 is provided. , The upper surface BT of the upper block is provided so as to be pressurized by vertically suspending the pressing cylinder 120,
Screw 8 for preventing excessive sinking connected to the uppermost sunk block
6 into the screw insertion hole 96 of the bracket 116,
A stop nut 87 is screwed into a predetermined position above the screw rod 86 protruding from the screw insertion hole 96, and a predetermined amount of the slow-hardening lubricating material D is pressed into the gap G between the ground and the sunk block from the conduit P1, A third step of operating the pressing cylinder 120 by fluid pressurization, adjusting the stop nut 87 and controlling the sedimentation, excavating and discharging the earth and sand on the inner bottom surface and settling the sediment to a predetermined depth, and then, during the slime of the bottom part, After adding the coagulant and removing the water and the separated aggregates, the cement-based solidifying agent is added, the cement-based solidifying agent is hardened, the bottom filling concrete C is poured, the bottom concrete is hardened, and the drainage is performed. A fourth step of removing the screw 86 and the centering device 50 for preventing excessive settlement and filling the residual gap G with the slow-hardening anti-friction material D, and a step of propelling the sewer from the inside of the sinking block B1 for the bottom part are performed. The tube After completion of the propulsion process, an intermediate floor slab block F having an opening eccentrically provided above the sunk block is placed and connected, a known manhole M is placed on the intermediate floor slab block F, and the excavation hole 15 space is formed. A method of constructing a manhole / propulsion sinking pit, comprising a fifth step of backfilling the part. 【請求項２】 外部において一体化した底部用の沈設ブ
ロックと上段用の沈設ブロックを使用して構築する、こ
とを特徴とする請求項１記載のマンホール兼推進用沈設
立坑の構築工法。2. The method for constructing a submerged pit for manholes and propulsion according to claim 1, wherein the pit is constructed using a bottom sunk block and an upper sunk block integrated outside. 【請求項３】 第３工程において、前記沈降制御装置１
３０のブラケット１１６に挿通していた過沈下防止用の
螺杆８６を、アンカーボルト２５に固着した過沈下防止
基部９７の螺杆挿通孔９６に挿通し、該螺杆８６を最上
段の沈設ブロックに連結した連結金具５７の螺杆連結部
５６に螺嵌して螺杆挿通孔９６から上方へ突出した螺杆
８６の所要位置に停止ナット８７を螺嵌した過沈下防止
装置９０に換装した、ことを特徴とする請求項１または
２何れか１項記載のマンホール兼推進用沈設立坑の構築
工法。3. In a third step, the sedimentation control device 1
The screw 86 for preventing excessive sinking inserted through the bracket 116 of the 30 is inserted into the screw insertion hole 96 of the base 97 for preventing excessive sinking fixed to the anchor bolt 25, and the screw 86 is connected to the uppermost sunk block. The over-subsidence prevention device 90 in which a stop nut 87 is screwed into a required position of a screw rod 86 which is screwed into the screw connection portion 56 of the connection fitting 57 and protrudes upward from the screw insertion hole 96, is replaced. Item 3. The method for constructing a submerged pit for manhole and propulsion according to any one of item 1 or 2. 【請求項４】 第２乃至第４工程において、湧水により
底部の掘削状態が視認困難な場合、深度目盛ｍを表示し
下端に複数の細孔Ｎを穿設した所要長さの水平部ｐｈを
逆Ｔ形に連結して設けた導管Ｐ２を、視認困難な刃口部
Ｂ０内側に挿入して圧搾空気を圧送し、前記刃口部Ｂ０
内側の土砂を崩壊させて排土する、ことを特徴とする請
求項１乃至３何れか１項記載のマンホール兼推進用沈設
立坑の構築工法。4. In the second to fourth steps, when the excavation state of the bottom is difficult to see due to spring water, a depth scale m is displayed and a horizontal portion ph of a required length in which a plurality of pores N are formed at the lower end. Is inserted into the inside of the blade port B0, which is difficult to see, and pressurized air is pumped into the pipe port P2.
The method for constructing a submerged pit for manhole and propulsion according to any one of claims 1 to 3, wherein the soil inside is collapsed and discharged. 【請求項５】 予定地を所定深さ掘削して掘削穴を設
け、該掘削穴内に刃口の付いた底部ブロックを吊り降ろ
して、該底部ブロック内面の土砂を掘削して順次上段の
沈設ブロック等を載置連結し最上段の沈設ブロック上面
に開口部を設けた床版ブロックを載置し、該床版ブロッ
ク上にマンホールを載置し床版ブロック上の空隙部を埋
戻すマンホール兼推進用沈設立坑の構築工法に用いる沈
降制御装置１３０であって、 階段状に第１底面５と第２底面１０を設けた掘削穴１５
の第１底面５に埋設した アンカーボルト２５に立脚部１
０９を設けた反力受部材１１０を固着し、立脚部１０９
に長手方向の所定位置に複数の係止孔１０４を設けたガ
イド軌条１１５を垂設し、該ガイド軌条１１５の係止孔
１０４に摺動して係止可能に設けたブラケット１１６を
係合し、該ブラケット１１６下面に一端を連結し他端に
押圧部１１９を設けた押圧シリンダ１２０を設け、過沈
下防止のため沈設ブロックに下端を連結した螺杆８６を
ブラケット１１６の螺杆挿通孔９６に遊挿し停止ナット
８７を所要位置上部に螺嵌して成る、ことを特徴とする
沈降制御装置。5. An excavation hole is formed by excavating a predetermined site to a predetermined depth.
Hang a bottom block with a cutting edge in the excavation hole.
Then, excavate the earth and sand on the inner surface of the bottom block and
Place the sunk blocks etc. and connect them to the top of the top sunk block.
Place a slab block with an opening in the slab block.
Place the manhole on the floor and fill the gap on the floor slab block.
Settlement used for the construction method
A descending control device 130, which has a first excavation hole 15 having a first bottom surface 5 and a second bottom surface 10 in a stepwise manner.
The anchor bolt 25 embedded in the first bottom surface 5 of the
09 is fixed to the reaction force receiving member 110 and
A guide rail 115 provided with a plurality of locking holes 104 at predetermined positions in the longitudinal direction is vertically provided, and a bracket 116 provided so as to be slidable and lockable by sliding into the locking hole 104 of the guide rail 115 is engaged. A pressing cylinder 120 having one end connected to the lower surface of the bracket 116 and a pressing portion 119 provided at the other end is provided, and a screw 86 having a lower end connected to a sunk block to prevent excessive sinking is loosely inserted into a screw insertion hole 96 of the bracket 116. A sedimentation control device, comprising a stop nut 87 screwed into an upper part of a required position. 【請求項６】 沈降制御装置１３０のガイド軌条１１５
にラック状の歯合部１１４を設けると共に、該ガイド軌
条１１５に摺動可能に係合させたブラケット１１６Ｂを
設け、該ブラケット１１６Ｂ内に下降時のみ遊動するラ
チェット１２２をスプリングＳＰにより前記歯合部１１
４に常時歯合可能に付勢して設けた、ことを特徴とする
請求項５記載の沈降制御装置。6. The guide rail 115 of the settling control device 130.
And a bracket 116B slidably engaged with the guide rail 115, and a ratchet 122 that moves only when the bracket 116B descends is moved into the bracket 116B by a spring SP. 11
The sedimentation control device according to claim 5, wherein the sedimentation control device is provided so as to be always meshed with the tooth.