JPH04176990A - Shield excavator - Google Patents
Shield excavatorInfo
- Publication number
- JPH04176990A JPH04176990A JP30249890A JP30249890A JPH04176990A JP H04176990 A JPH04176990 A JP H04176990A JP 30249890 A JP30249890 A JP 30249890A JP 30249890 A JP30249890 A JP 30249890A JP H04176990 A JPH04176990 A JP H04176990A
- Authority
- JP
- Japan
- Prior art keywords
- seal
- shaft
- shield excavator
- shield
- jacks
- 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.)
- Granted
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 5
- 230000008595 infiltration Effects 0.000 abstract 2
- 238000001764 infiltration Methods 0.000 abstract 2
- 239000013049 sediment Substances 0.000 abstract 2
- 239000004570 mortar (masonry) Substances 0.000 description 15
- 238000007789 sealing Methods 0.000 description 13
- 238000002347 injection Methods 0.000 description 7
- 239000007924 injection Substances 0.000 description 7
- 238000010276 construction Methods 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000009412 basement excavation Methods 0.000 description 3
- 238000012805 post-processing Methods 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分計〉
本発明はシールド掘削機に関し、特に、立坑とシールド
掘削機との接続作業の工期を短縮するためのシール装置
に関する。DETAILED DESCRIPTION OF THE INVENTION <Industrial Applicability> The present invention relates to a shield excavator, and particularly to a sealing device for shortening the construction period for connecting a shaft and a shield excavator.
〈従来の技術〉
第４図を参照して従来の接続工法を説明する。 −
同図において、１はケーソン基礎によるコンクリート製
の立坑であり、地山２中に埋められている。立坑１の側
！３のうち、シールド掘削機４との接続のため除去され
る部分５は、コンクリート製の強度の高い内側部分５Ａ
と、モルタル製の強度の低い外側部分５Ｂとからできて
いる。内側部分５Ａはシールド掘削機４の接続前に必要
な強度を確保できる範囲で肉薄に作られており、以下、
仮壁と称する。<Prior Art> A conventional connection method will be explained with reference to FIG. - In the figure, 1 is a concrete vertical shaft with a caisson foundation, which is buried in the ground 2. The side of shaft 1! 3, the part 5 to be removed for connection with the shield excavator 4 is a high-strength inner part 5A made of concrete.
and a weaker outer portion 5B made of mortar. The inner portion 5A is made as thin as possible to ensure the necessary strength before connecting the shield excavator 4.
It is called a temporary wall.
また、立坑１の側壁３には、地山２側に開口する地盤改
良剤の注入通路６が貫通しており、バルブ７を介してモ
ルタルのタンク（図示省略）に接続されている。Further, a ground improvement agent injection passage 6 that opens toward the ground 2 passes through the side wall 3 of the shaft 1, and is connected to a mortar tank (not shown) via a valve 7.
そして、シールド掘削機４がトンネルを堀り進んで第４
図（ａｌの如く立坑１に到達すると、そのままモルタル
部分５Ｂを掘削し、第４図（ｂ）の如く仮壁５Ａの手前
で掘削を止める。この状態で、注入通ｌｓ６を通して立
坑１側から、更にはシールド掘削機４側から、モルタル
８を地山２中に注入して、シールド本体（スキンプレー
ト）９及びその後方のセグメント１０の周囲の地盤を改
良する。この地盤改良は、仮壁５Ａを除去する際に、隙
間１１から立坑１内に土砂、水が流入するのを防ぐため
である。Then, the shield excavator 4 digs the tunnel and the fourth
When the shaft 1 is reached as shown in Figure (al), the mortar portion 5B is excavated as it is, and the excavation is stopped before the temporary wall 5A as shown in Figure 4(b).In this state, from the shaft 1 side through the injection hole ls6, Furthermore, mortar 8 is injected into the ground 2 from the shield excavator 4 side to improve the ground around the shield main body (skin plate) 9 and the segment 10 behind it. This is to prevent earth, sand and water from flowing into the shaft 1 from the gap 11 when removing.
モルタルの注入と、それによる地盤改良が終了したら、
第４図（ｅ）に示すように、立坑１内から別の機械１２
により仮壁５Ａを除去する。これにより、立坑１にシー
ルド掘削機４が貫通して両者が接続されるので、シール
ド本体９をトンネル構造物として残し、他のカッタヘッ
ド１３等の機器を運び去勢、適宜な後処理を行う。なお
、仮壁５Ａの除去後、第４図（山に示す如く、シールド
本体９先端の７−ド１４が立坑１内に入るまでシールド
掘削機４を前進させるとともある。After pouring mortar and improving the ground with it,
As shown in FIG. 4(e), another machine 12 is removed from the shaft 1.
The temporary wall 5A is removed by. As a result, the shield excavator 4 penetrates the shaft 1 and the two are connected, leaving the shield main body 9 as a tunnel structure and carrying other equipment such as the cutter head 13 and performing castration and appropriate post-processing. It should be noted that after the temporary wall 5A is removed, the shield excavator 4 is moved forward until the 7-door 14 at the tip of the shield body 9 enters the shaft 1, as shown in FIG.
〈発明が解決しようとする課題〉
仮壁５Ａの除去の際に土砂や水の大量流入を防ぐ方法と
して、前述の如〈従来は、モルタル８を地山２に注入し
て地盤改良を図るだけである。そのため、シールド本体
９及びセグメント１０周囲の広範囲にわたってモルタル
８を注入し、地盤が十分固まった後でないと、仮！！５
Ａの除去作業及びシールド本体９の前進作業を行うこと
ができず、それだけ工期が長くかかっていた。大きなト
ンネルの場合、モルタル注入に１ケ月以上要する。<Problems to be Solved by the Invention> As a method for preventing a large amount of earth and water from flowing in when removing the temporary wall 5A, as described above, conventionally, mortar 8 was poured into the ground 2 to improve the ground. It is. Therefore, mortar 8 must be injected over a wide area around the shield body 9 and segments 10, and the ground must be sufficiently solidified before it can be used. ! 5
It was not possible to perform the removal work of A and the work of advancing the shield body 9, and the construction period took a long time. For large tunnels, pouring mortar can take more than a month.
本発明は上述の従来技術に艦み、立坑とシールド掘削機
との接続に要する工期を短縮することができるシール装
置を備えたシールド掘削機を提供することを目的とする
。The present invention is based on the above-mentioned prior art and aims to provide a shield excavator equipped with a sealing device that can shorten the construction period required for connecting the shaft and the shield excavator.
く課題を解決するための手段〉
本発明によるシールド掘削機は、シールド掘削機のシー
ルド本体の前部外周に形成した環状凹部と、この環状凹
部に挿着した弾性を有する環状シールと、この環状シー
ルの内側において環状凹部の底に円周状多数配置したジ
ヤツキとを具備することを特徴とするものである。Means for Solving the Problems> A shield excavator according to the present invention includes: an annular recess formed on the front outer periphery of a shield body of the shield excavator; an elastic annular seal inserted into the annular recess; The seal is characterized by having a plurality of jacks arranged circumferentially at the bottom of the annular recess inside the seal.
く作 用〉
立坑接続部分の仮壁（内側部分）を立坑内から除去する
前に、外側部分を掘削して出来た穴に環状シールが入っ
た状態で、ジヤツキを伸長する。これにより環状シール
が拡径してシールド本体の外方へ突出し、立坑との間を
シールする。Action> Before removing the temporary wall (inner part) of the shaft connection part from inside the shaft, extend the jack with the annular seal inserted in the hole created by excavating the outer part. This causes the annular seal to expand in diameter and protrude outward from the shield body, sealing the space between it and the shaft.
従って、地盤改良剤の注入中に仮壁の除去作業を並行し
て行っても立坑内に土砂や水が流入するのを阻止でき、
工期を短縮することができる。Therefore, even if the temporary wall is removed while the ground improvement agent is being injected, it is possible to prevent soil and water from flowing into the shaft.
Construction period can be shortened.
く実 施 例〉
以下、第１図〜第３図を参照して本発明の詳細な説明す
る。Embodiments Hereinafter, the present invention will be described in detail with reference to FIGS. 1 to 3.
第３図（ａｌに全体の概略構成を示す。同図（ａｌの如
く、シールド掘削機４のシールド本体９の前部外周に、
環状のシール装置１５をシールド本体９から突出可能に
設けである。一方、立坑１０側Ｍ１３のうち、シールド
掘削機４との接続部分５は従来と同じくコンクリート製
の内側部分即ち仮ｇ１５Ａと、モルタル製又はスポンジ
やゴム製の外側部分５Ｂからなり、仮Ｉ！１５Ａの厚さ
は側壁３の厚さの約１７４にしである。FIG. 3 (al) shows the overall schematic configuration. As shown in FIG.
An annular sealing device 15 is provided so as to be able to protrude from the shield body 9. On the other hand, of the M13 on the shaft 10 side, the connection part 5 with the shield excavator 4 consists of an inner part made of concrete, that is, temporary g15A, and an outer part 5B made of mortar, sponge, or rubber, as in the past, and is made of temporary I! The thickness of 15A is about 174 times the thickness of side wall 3.
第１図、第２図によ咬シール装置１５の詳細を説明する
。環状シール装置１５は、ゴムや合成Ｉ／Ｍ脂製の環状
シール１７と多数のジヤツキ例えばネジジヤツキ１８か
らなる。そして、シールド本体９の外周に環状凹部１９
を形成し、その底の環状支持部材２０にジヤツキ１８を
多数円周状に設置し、これらの外周に環状シール１７を
設置しである。各ジヤツキ１８の先端と環状シール１７
との間には均一に力を加えるように別々にシール押え板
２１を設けである。図中、２２はジヤツキ取付座、２３
はジヤツキのネジ部、２４は同ナツト部である。また２
５はカッタヘッド駆動機構等の支持部材、２６はシール
ド掘削機側のモルタル注入通路である。The details of the bite seal device 15 will be explained with reference to FIGS. 1 and 2. The annular seal device 15 includes an annular seal 17 made of rubber or synthetic I/M resin and a number of jacks, such as screw jacks 18. An annular recess 19 is provided on the outer periphery of the shield body 9.
A large number of jacks 18 are installed in a circumferential manner on the annular support member 20 at the bottom thereof, and an annular seal 17 is installed around the outer periphery of these jacks. The tip of each jack 18 and the annular seal 17
Seal pressing plates 21 are separately provided between the sealing plate and the sealing plate so as to apply force uniformly. In the figure, 22 is the jack mounting seat, 23
24 is the screw part of the jack, and 24 is the nut part. Also 2
5 is a support member such as a cutter head drive mechanism, and 26 is a mortar injection passage on the shield excavator side.
環状シール１７ばジヤツキ１８の短縮状態では環状凹部
１９内に入り込んで突出せず、適宜なアクチュエータ又
は手操作によりジヤツキ１８のネジ部２３をまわし、ジ
ヤツキ１８を伸長させて環状シール１７を拡径すること
により、シール動作を行う。When the annular seal 17 and the jack 18 are in the shortened state, the annular seal 17 enters into the annular recess 19 and does not protrude, and the screw portion 23 of the jack 18 is turned by an appropriate actuator or by manual operation to extend the jack 18 and expand the diameter of the annular seal 17. This performs a sealing action.
次に第３図を参照して、本発明のシールド掘削機と立坑
との接続工法を説明する。Next, with reference to FIG. 3, a method of connecting a shield excavator and a vertical shaft according to the present invention will be explained.
接続作業としては、シールド掘削機４が立坑１に到達す
ると、同図（ａ）の如く、立坑１側のバルブ７及びシー
ルド掘削機４側のバルブ１６を開き、地山２中に地盤改
良剤としてモルタル８の注入を開始する。As for the connection work, when the shield excavator 4 reaches the shaft 1, the valve 7 on the shaft 1 side and the valve 16 on the shield excavator 4 side are opened as shown in FIG. As a result, pouring of mortar 8 is started.
次に、モルタル注入中に、第３図［ｂｌの如（、シール
ド掘削機４を前進させ、立坑１の接続部分５の掘削を開
始する。Next, during the mortar pouring, as shown in FIG.
この掘削中、環状シール装置１５が掘削した穴５Ｃに入
った後、環状シール装置１５をシールド本体９の外方へ
突出させ、立坑１との間をシールする。例えば、第３図
（ｂｌの如（、外側部分５Ｂの掘削がちょうど完了した
所で、ジヤツキ１８を伸長させて環状シール装置１５を
作動させ、この状態でシールド掘削機４の前進を停止す
る。During this excavation, after the annular seal device 15 enters the excavated hole 5C, the annular seal device 15 is made to protrude outward from the shield body 9 and seals between it and the shaft 1. For example, as shown in FIG. 3 (bl), when the excavation of the outer portion 5B has just been completed, the jack 18 is extended to activate the annular sealing device 15, and in this state, the forward movement of the shield excavator 4 is stopped.
そして、モルタル注入とシール装置１５によるシールを
行っているまま、第３図（Ｃ１の如く、立坑１内から接
続部分５のコンクリート製板４Ｊ５Ａを機械１２で除去
する。Then, while mortar injection and sealing by the sealing device 15 are being performed, the concrete plate 4J5A of the connecting portion 5 is removed from the inside of the shaft 1 by the machine 12, as shown in FIG. 3 (C1).
仮壁５Ａの除去後、必要に応じて第３図（ｄ）の如くシ
ールド本体９のフード１４が立坑１内にちょうど入るま
で、シールド掘削機４を前進させて止める。After removing the temporary wall 5A, if necessary, the shield excavator 4 is advanced and stopped until the hood 14 of the shield body 9 just enters the shaft 1 as shown in FIG. 3(d).
仮壁５Ａの除去後も、又はその後のシールド掘削機４の
前進後もモルタル８の注入を続け、所要量に達したら止
める。この間、カッタヘッド１３等の撤去、シールド本
体９内の二次巻き作業など、適宜な後処理を行う。環状
シール装置１５ζよそのまま放置しても、又は撤去して
もかまわない。Even after the removal of the temporary wall 5A or after the shield excavator 4 moves forward, the injection of mortar 8 is continued and stopped when the required amount is reached. During this time, appropriate post-processing is performed, such as removing the cutter head 13 and the like, and performing secondary winding work within the shield body 9. The annular seal device 15ζ may be left as is or removed.
〈発明の効果〉
本発明のシールド掘削機はシールド本体の前部外周に突
出可能に環状のシール装置を備えているので、地盤改良
剤の注入中に、シールド本体と立坑の接続部分の内周間
をシールして接続部分の内側部分（仮壁）の除去作業を
並行して行うことができ、立坑とシールド掘削機との接
続工期を短縮することができる。<Effects of the Invention> Since the shield excavator of the present invention is equipped with an annular sealing device that can protrude from the front outer periphery of the shield main body, the inner periphery of the connecting part between the shield main body and the shaft is removed during injection of ground improvement agent. The inner part (temporary wall) of the connection part can be removed in parallel by sealing the space between the shafts and the shield excavator, thereby shortening the construction period for connecting the shaft and the shield excavator.
第１ｒＩＩＪと第２図は本発明の一実施例を示す断面図
、第３図は本発明のシールド掘削機による立坑との接続
工法を示す図、第４図は従来技術を示す図である。
図面中、１は立坑、２ｔよ地山、３は６１！！！、４は
シールド掘削機、５は接続部分、５Ａは内側部分（仮壁
）、５Ｂは外側部分、５Ｃは穴、６と２６は注入通路、
７と１６はバルブ、８は地盤改良剤（モルタル）、９は
シールド本体１１０はセグメント、１３はカッタヘッド
、１４はフード、１５はシール装置、１７は環状シール
、１８はジヤツキ、１９は環状凹部である。
第１図
実施例
弔
失
３図
施例
弔
４図
光来1rIIJ and FIG. 2 are cross-sectional views showing an embodiment of the present invention, FIG. 3 is a view showing a method of connecting a shaft with a shield excavator of the present invention, and FIG. 4 is a view showing a conventional technique. In the drawing, 1 is the shaft, 2t is the ground, and 3 is 61! ! ! , 4 is a shield excavator, 5 is a connection part, 5A is an inner part (temporary wall), 5B is an outer part, 5C is a hole, 6 and 26 are injection passages,
7 and 16 are valves, 8 is a ground improvement agent (mortar), 9 is a shield body 110 is a segment, 13 is a cutter head, 14 is a hood, 15 is a sealing device, 17 is an annular seal, 18 is a jack, 19 is an annular recess It is. Figure 1 Example of death Figure 3 Example of funeral Figure 4 Light coming
Claims (1)
状凹部と、この環状凹部に挿着した弾性を有する環状シ
ールと、この環状シールの内側において環状凹部の底に
円周状多数配置したジャッキとを具備することを特徴と
するシールド掘削機。An annular recess formed on the front outer periphery of the shield body of the shield excavator, an elastic annular seal inserted into the annular recess, and a large number of jacks arranged circumferentially at the bottom of the annular recess inside the annular seal. A shield excavator characterized by comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30249890A JPH07103772B2 (en) | 1990-11-09 | 1990-11-09 | Shield excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30249890A JPH07103772B2 (en) | 1990-11-09 | 1990-11-09 | Shield excavator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04176990A true JPH04176990A (en) | 1992-06-24 |
| JPH07103772B2 JPH07103772B2 (en) | 1995-11-08 |
Family
ID=17909685
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30249890A Expired - Fee Related JPH07103772B2 (en) | 1990-11-09 | 1990-11-09 | Shield excavator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07103772B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2913452A1 (en) * | 2007-03-08 | 2008-09-12 | Eiffage Tp Soc Par Actions Sim | Sealed connection device for extracting tunneling machine, has cover and shell mechanically resisting to pressure difference between chamber and ground pressures, where tunnel is dug in ground during entry of cutting wheel in chamber |
-
1990
- 1990-11-09 JP JP30249890A patent/JPH07103772B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2913452A1 (en) * | 2007-03-08 | 2008-09-12 | Eiffage Tp Soc Par Actions Sim | Sealed connection device for extracting tunneling machine, has cover and shell mechanically resisting to pressure difference between chamber and ground pressures, where tunnel is dug in ground during entry of cutting wheel in chamber |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07103772B2 (en) | 1995-11-08 |
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