JPH04176991A - Connecting mehtod of vertical shaft and shield excavator - Google Patents
Connecting mehtod of vertical shaft and shield excavatorInfo
- Publication number
- JPH04176991A JPH04176991A JP30249990A JP30249990A JPH04176991A JP H04176991 A JPH04176991 A JP H04176991A JP 30249990 A JP30249990 A JP 30249990A JP 30249990 A JP30249990 A JP 30249990A JP H04176991 A JPH04176991 A JP H04176991A
- Authority
- JP
- Japan
- Prior art keywords
- shaft
- shield excavator
- shield
- vertical shaft
- side wall
- 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
- 238000007789 sealing Methods 0.000 claims abstract description 16
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 10
- 238000002347 injection Methods 0.000 claims abstract description 10
- 239000007924 injection Substances 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims description 10
- 238000009412 basement excavation Methods 0.000 claims description 3
- 239000004570 mortar (masonry) Substances 0.000 abstract description 17
- 238000010276 construction Methods 0.000 abstract description 10
- 239000002689 soil Substances 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000003213 activating effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012805 post-processing Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 230000004523 agglutinating effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用公費〉
本発明は立坑とシールド掘削機との接続工法に関し、特
に、工期短縮のための改良に関する。Detailed Description of the Invention <Public Expenses for Industrial Use> The present invention relates to a method for connecting a shaft and a shield excavator, and particularly relates to an improvement for shortening the construction period.
〈従来の技術〉 第５図を参照して従来の接続工法を説明する。<Conventional technology> A conventional connection method will be explained with reference to FIG.
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、亀山２中に埋められている。立坑１の側
壁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。In the figure, 1 is a concrete vertical shaft with a caisson foundation, which is buried in Kameyama 2. The part 5 of the side wall 3 of the shaft 1 that is 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！Ｉ３には、地山２＃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（図示智略）に接続されている。Also, the side of shaft 1! A ground improvement agent injection passage 6 that opens into the ground 2# passes through I3, 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５
図（−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５開山）の如く仮ｆｉ５Ａの手前で
ｍ削を止める。この状態で、注入通路６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ｌＯ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１
１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 fifth
When the shaft 1 is reached as shown in the figure (-), the mortar portion 5B is excavated as it is, and m-cutting is stopped before the temporary fi 5A as shown in the fifth opening. In this state, the shaft 1 is passed through the injection passage 6.
Mortar 8 is injected into the ground 2 from the side, and further from the side of the shield excavator 4, and the shield body (skin plate) is
9 and the ground around segment 10 behind it will be improved. In this ground improvement, when removing the temporary wall 5A, the gap 1
This is to prevent earth, sand and water from flowing into the shaft 1.
モルタルの注入と、それによる地盤改良が終了したら、
第５図（ｃｌ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等の横着を運び去り、適宜な後処理を行う。なお
、仮壁５Ａの除去後、第５図（司に示す如く、シールド
本体９先端のフード１４が立坑１内に入るまでシールド
［１１機４を前進させろこともある。After pouring mortar and improving the ground with it,
As shown in Fig. 5 (cl), from inside the shaft 1 to another machine 12
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, carrying away other objects such as the cutter head 13, and performing appropriate post-processing. After removing the temporary wall 5A, the shield 11 may be moved forward until the hood 14 at the tip of the shield main 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。モのため、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！Ｉ５
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. Because of this, mortar 8 must be injected over a wide area around the shield body 9 and segments 10, and the ground must be sufficiently hardened. I5
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鑑み、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工法を提
供することを目的とする。In view of the above-mentioned prior art, an object of the present invention is to provide a construction method that can shorten the construction period required for connecting a shaft and a shield excavator.
く課題を解決するための手段〉
第１の発明による立坑とシールド掘削機との接続工法は
、立坑の側壁のうち相対的に硬い内側部分と軟かい外側
部分とからなる接続部分を除去して、立坑とシールド掘
削機を接続する工法において、
立坑側から地山中に地盤改良剤を注入すること、
地盤改良剤の注入中に、立坑の接続部分をシールド掘削
機で掘削開始すること、
接続部分のうち外側部分の掘削中に、シールド本体の外
周と接続部分の内周間をシールするシール手段を作動さ
せること、
シールド掘削機が接続部分のうち内側部分を掘削する前
に、シール手段を作動させたまま、シールド掘削機を停
止すること、及び、シールド掘削機の停止中に、接続部
分のうち内側部分を立坑内から除去することを特徴とす
る。Means for Solving the Problem> The method for connecting a shaft and a shield excavator according to the first invention removes a connecting portion consisting of a relatively hard inner portion and a soft outer portion of the side wall of the shaft. , In the method of connecting a shaft and a shield excavator, the ground improvement agent is injected into the ground from the shaft side, the shield excavator starts excavating the connecting part of the shaft while the soil improvement agent is being injected, and the connecting part Activating a sealing means for sealing between the outer periphery of the shield body and the inner periphery of the connecting part while excavating the outer part of the shield, and activating the sealing means before the shield excavator excavates the inner part of the connecting part. The present invention is characterized in that the shield excavator is stopped while the shield excavator is stopped, and that the inner portion of the connecting portion is removed from the shaft while the shield excavator is stopped.
また、第２の発明による立坑とシールド掘削機との接続
工法は、第１の発明において接続部分のうち内側部分を
除去したのち、シール手段を作動させたまま、シールド
本体をフードが立坑内に入るまで前進させることを特徴
とする。In addition, in the method of connecting a shaft and a shield excavator according to the second invention, after removing the inner part of the connecting part in the first invention, the shield body is inserted into the shaft so that the hood remains in operation while the sealing means is operated. It is characterized by moving forward until it enters.
く作 用〉
第１．第２いずれの発明においても、地盤改良剤の注入
に並行して、立坑の側壁の接続部分のうち、シールド掘
削機による外側部分の′ＨＩ１１と、立坑内からの内側
部分の除去とを行う。この間、立坑内への土砂や水の流
入をシール手段が阻止する。これにより 、地盤ａ良剤
の注入に長期開票しても、これと並行に接続作業が進行
し、全体の工期が短縮１″石９、く実 施 例〉
以下、第１図−第４図を参照して本発明の詳細な説明す
る。Effect〉 1st. In any of the second inventions, in parallel with the injection of the ground improvement agent, the outer portion of the connecting portion of the side wall of the shaft is subjected to 'HI11' using a shield excavator, and the inner portion is removed from within the shaft. During this time, the sealing means prevents earth, sand, and water from flowing into the shaft. As a result, even if it takes a long time to inject the soil agglutinating agent, the connection work can proceed in parallel, reducing the overall construction period by 1 inch. The present invention will be described in detail with reference to FIG.
第１図は本発明の一実施例を示し、同図（闇の如＜、シ
・〜ルド掘削樒４のシールド本体９の前部外周に、環状
のシーツ１、装Ｍ１５をシールド本体９から突出可能に
設けである。一方、立坑１の６１９３のうち、シールド
掘削機４との接続部分５ば従来と同じくコンクリート製
の内６１１部分即ち仮Ｈ１！５ Ａ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、仮壁５Ａの
厚さは＠壁３の厚さの約１／４にしである。FIG. 1 shows an embodiment of the present invention. On the other hand, of the 6193 parts of the shaft 1, the connecting part 5 with the shield excavator 4 is made of concrete as before, the inner part 611, that is, temporary H1!5 A, and the part made of mortar, sponge, or rubber. The thickness of the temporary wall 5A is approximately 1/4 of the thickness of the wall 3.
接続作業どしでは、シーツ１．ド娼削機４が立坑ｌ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
盤改良剤としてて；ルタ／Ｌ ８の注入を開始する。For connection work, please use sheets 1. 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. /L Begin infusion of 8.
次に、モルタル注入中に、第１図（１）ｌの如（、シー
ルド掘削ｌｌｍ４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 injection, as shown in FIG.
この掘削中、環状シ・−小装置［１５が掘削した穴５Ｃ
に入った後、環状シール装置１５４ｉ？シールド本体９
の開方へ、突出させ、立坑１との間をシールする。例え
ば、第１図（１））の如く、外側部分５Ｂの掘削がちＪ
、うど完了した所で、環状シール装置１５を作動させ、
この状態でシールド掘削＠４の前進を停止する。During this excavation, the hole 5C drilled by the annular C-small device [15]
After entering the annular sealing device 154i? Shield body 9
The vertical shaft 1 is made to protrude toward the opening of the vertical shaft 1, and the space between the vertical shaft 1 and the vertical shaft 1 is sealed. For example, as shown in Fig. 1 (1)), the outer portion 5B is excavated
, when the process is completed, actuate the annular sealing device 15,
In this state, the advance of shield excavation @4 is stopped.
そして、モルタル注入と環状シ〜・ル装置１５［ｌ：′
よるシ・−）１．を行−っているまま、第１図（Ｃ）の
如く、立坑１内から接続部分５のコンクリート製仮壁５
Ａを機械１２で除去する。Then, mortar injection and annular sealing device 15 [l:'
Yorushi・-)1. While doing so, as shown in Figure 1(C), remove the concrete temporary wall 5 of the connecting part 5 from inside the shaft 1.
A is removed by machine 12.
仮壁５Ａの除去後、必要に応じて第１図（由の如くシー
ルド本体９のフード１４が立坑１内にちょうど入るまで
、シールド局か１機４１ｅ前進させて止める〇
仮壁５Ａの除去後も、又はその後のシールド掘削ｆｌａ
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Ｊｊ二める。この開、カッタヘッド１３等の幻去、シ
ー・ルド本体９内の二次巻き作ｔなど、適宜な後処理を
行う。環状シール装置ｉ１５はそのまま放齢しても、又
は撤去してもかまわない。After removing the temporary wall 5A, if necessary, move the shield station 41e forward and stop it until the hood 14 of the shield body 9 just enters the shaft 1 as shown in Figure 1 (After removing the temporary wall 5A) or subsequent shield drilling fla
Continue pouring mortar 8 even after the advance of 4, and when the required amount is reached, reduce Jj. Appropriate post-processing is performed, such as opening this, removing the cutter head 13, etc., and creating a secondary winding inside the shield main body 9. The annular seal device i15 may be left alone or removed.
第２図、第３閃りこより、環状シール装ｗ１５の一例を
説明する。環状シール装置［１５は、ゴムや合成樹脂製
の環状シール１７と多数のジヤツキ例えばネジ式ジャツ
ギ１８からなる。An example of the annular seal w15 will be explained from FIGS. 2 and 3. The annular seal device [15 includes an annular seal 17 made of rubber or synthetic resin and a number of jacks, such as screw jacks 18.
そして、シールド本体９の外周に環状四部１９を形成し
、その底の環状支持部材２０８こジヤツキ１８を多数円
周状に設置し、とわらのダ局に環状シール１７を設置し
である。各ジヤツキ１Ｂの先端と環状シー・ｅ１７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は同ナッ）・部である。まｔこ２
５はカッタ・＼ラ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。Then, an annular four part 19 is formed on the outer periphery of the shield main body 9, a plurality of annular support members 208 and a plurality of screws 18 are installed on the bottom of the annular part 19, and an annular seal 17 is installed in the outer circumference of the shield body 9. A separate seal presser plate 21 is placed between the tip of each jack 1B and the annular seam e17 so as to apply force uniformly.
This is provided. In the figure, 22 is the jack mounting seat, 23 is the threaded part of the jack, and 24 is the same nut. Matoko 2
5 is a support member for the cutter/rad drive mechanism, etc., and 26 is a mortar injection passage on the shield excavator side.
この環状シール装置１５の場合は、適宜なアクチュエー
タ又は手操作によりジヤツキ１Ｂ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。In the case of this annular sealing device 15, the sealing operation is performed by turning the threaded portion 23 of the jack 1B using an appropriate actuator or manual operation to extend the jack 18 and expand the diameter of the annular seal 17.
第４図は立坑１６１に環状シール装置２７＠設けた例を
示し、接続部分５のうち外側部分５Ｂの外局（ζ、掘削
された穴５Ｃに対し突出可能な適宜な環状シール装ｆ２
７を埋設しである。ζ、の場合は、環状シール装ｗ２７
の内側にシールド本体９が位ｔした時、例えば環状シー
ル装＠２７の内側の掘削が完了した時、環状シール装ｗ
２７を作動させ、立坑１とシールド本体９間をシールす
る。FIG. 4 shows an example in which an annular seal device 27@ is provided in the shaft 161, and an appropriate annular seal device f2 that can protrude into the outer part 5B of the connecting portion 5 (ζ,
7 is buried. ζ, in the case of annular seal w27
When the shield body 9 is positioned inside the annular sealing device 27, for example, when the excavation inside the annular sealing device @27 is completed, the annular sealing device w
27 to seal between the shaft 1 and the shield body 9.
〈発明の効果〉
本発明によれば、シール手段によゆシ・−ルド本体の外
周と立坑の接続部分の内層間なシールして、地盤改良剤
の注入中に接続部分の除去を並行して行うので、工期が
短縮する。<Effects of the Invention> According to the present invention, the sealing means seals between the outer periphery of the shield body and the inner layer of the connecting portion of the shaft, and the connecting portion is removed in parallel during injection of the ground improvement agent. The construction period is shortened.
第１＠は本発明工法の一実施例な示ず図、第２図と第３
図は環状シール装置の一例を示す断面図、第４図は本発
明工法の他の実施例を示す図、第５図は従来技術を示す
図である。
図面中、１は立坑、２は地山、３は側壁、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、１０はセグメント、１３はカッタヘッド、１４は
フード、１５と２７は環状シール装置である。Figure 1 @ shows an example of the construction method of the present invention, Figures 2 and 3
The figure is a sectional view showing an example of an annular seal device, FIG. 4 is a view showing another embodiment of the construction method of the present invention, and FIG. 5 is a view showing a conventional technique. In the drawing, 1 is the shaft, 2 is the ground, 3 is the side wall, 4 is the shield excavator, 5 is the connection part, 5A is the inner part (temporary wall), 5B
is the outer part, 5C is the hole, 6 and 26 are the injection passages, 7 and 16
8 is a valve, 8 is a ground improvement agent (mortar), 9 is a shield body, 10 is a segment, 13 is a cutter head, 14 is a hood, and 15 and 27 are annular seal devices.
Claims (2)
外側部分とからなる接続部分を除去して、立坑とシール
ド掘削機を接続する工法において、 立坑側から地山中に地盤改良剤を注入すること、 地盤改良剤の注入中に、立坑の接続部分をシールド掘削
機で掘削開始すること、 接続部分のうち外側部分の掘削中に、シールド本体の外
周と接線部分の内周間をシールするシール手段を作動さ
せること、 シールド掘削機が接続部分のうち内側部分を掘削する前
に、シール手段を作動させたまま、シールド掘削機を停
止すること、及び、シールド掘削機の停止中に、接続部
分のうち内側部分を立坑内から除去することを特徴とす
る立坑とシールド掘削機との接続工法。(1) In a method of connecting a shaft and a shield excavator by removing the connecting part consisting of a relatively hard inner part and a soft outer part of the side wall of the shaft, a ground improvement agent is applied into the ground from the shaft side. During the injection of ground improvement agent, start excavating the connecting part of the shaft with a shield excavator. While excavating the outer part of the connected part, seal between the outer periphery of the shield body and the inner periphery of the tangential part. before the shield excavator excavates the inner portion of the connection part, stopping the shield excavator with the seal means in operation; and while the shield excavator is stopped, A method for connecting a shaft and a shield excavator, characterized by removing the inner part of the connection part from inside the shaft.
を除去したのち、シール手段を作動させたまま、シール
ド本体をフードが立坑内に入るまで前進させることを特
徴とする立坑とシールド掘削機との接続工法。(2) The shaft and shield excavation according to claim (1), characterized in that after removing the inner portion of the connecting portion, the shield body is advanced until the hood enters the shaft while the sealing means is operated. Connection method with machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30249990A JPH07103773B2 (en) | 1990-11-09 | 1990-11-09 | Connection method between vertical shaft and shield excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30249990A JPH07103773B2 (en) | 1990-11-09 | 1990-11-09 | Connection method between vertical shaft and shield excavator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04176991A true JPH04176991A (en) | 1992-06-24 |
| JPH07103773B2 JPH07103773B2 (en) | 1995-11-08 |
Family
ID=17909699
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30249990A Expired - Lifetime JPH07103773B2 (en) | 1990-11-09 | 1990-11-09 | Connection method between vertical shaft and shield excavator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07103773B2 (en) |
-
1990
- 1990-11-09 JP JP30249990A patent/JPH07103773B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07103773B2 (en) | 1995-11-08 |
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