JPH0663432B2 - Backfill injection method in propulsion method - Google Patents
Backfill injection method in propulsion methodInfo
- Publication number
- JPH0663432B2 JPH0663432B2 JP63055829A JP5582988A JPH0663432B2 JP H0663432 B2 JPH0663432 B2 JP H0663432B2 JP 63055829 A JP63055829 A JP 63055829A JP 5582988 A JP5582988 A JP 5582988A JP H0663432 B2 JPH0663432 B2 JP H0663432B2
- Authority
- JP
- Japan
- Prior art keywords
- shield machine
- curable material
- peripheral surface
- pipe body
- injected
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
- Lining And Supports For Tunnels (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は推進工法によって地中に下水管等の管体を埋設
する際に、掘削地盤と管体外周面間の隙間に裏込注入を
行う方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention, when burying a pipe body such as a sewer pipe in the ground by a propulsion method, performs backfill injection into a gap between the excavated ground and the outer peripheral surface of the pipe body. It's about how to do it.
〔従来の技術〕 シールド機によって地盤を掘削すると共に該シールド機
の後端にヒューム管等の埋設管を接続して発進立坑側か
らジャッキにより埋設管及びシールド機を推進する工法
においては、埋設管と掘削地盤との隙間に滑材としての
裏込材を注入しながら推進することが行われており、こ
の工法によって推進距離の長大化、や推進設備の縮小、
小型化が図れるものである。[Prior Art] In the method of excavating the ground with a shield machine and connecting an embedded pipe such as a fume pipe to the rear end of the shield machine and propelling the embedded pipe and the shield machine with a jack from the starting shaft side, the embedded pipe It is being carried out while injecting a backing material as a slipping material into the gap between the excavated ground and the excavated ground, and this method increases the propulsion distance and reduces the propulsion equipment,
It can be miniaturized.
この裏込材の注入は、第４図に示すように、シールド機
（ａ）の径と埋設管（ｂ）の径との差によって生じる隙
間（ｃ）に、シールド機（ａ）に後続する一本目の埋設
管（ｂ）の先端部に穿設した注入口（ｄ）を用いて注入
される。この時、発進立坑（ｅ）の坑口には、滑材が立
坑内に漏れないように坑口パッキン（ｆ）が配設され
る。As shown in FIG. 4, the injection of the backfill material follows the shield machine (a) into the gap (c) caused by the difference between the diameter of the shield machine (a) and the diameter of the buried pipe (b). It is injected using the injection port (d) formed at the tip of the first buried pipe (b). At this time, a wellhead packing (f) is arranged at the wellhead of the starting shaft (e) so that the lubricant does not leak into the shaft.
又、筒状の不透水性膜材（ｇ）をシールド機（ａ）から
繰り出して埋設管（ｂ）を被覆することも行われてい
る。Further, a tubular impermeable membrane material (g) is also fed from the shield machine (a) to cover the buried pipe (b).
しかしながら、前者の場合は、注入した滑材が地盤に浸
透したり、或いは地下水が埋設管（ｂ）（ｂ）の接合部
等から浸入することがある。However, in the former case, the injected lubricant may infiltrate the ground, or groundwater may infiltrate from the joints of the buried pipes (b) and (b).
一方、後者の場合には、膜材（ｇ）と埋設管（ｂ）との
隙間に滑材としての裏込材を注入すると、埋設管（ｂ）
に浮力が生じて浮上し、該埋設管（ｂ）の外周面と膜材
（ｇ）とが接触して埋設管（ｂ）の前進により膜材
（ｇ）が摺擦、破損することが生じ、又、埋設管（ｂ）
を曲線状に推進工法する時には、その屈曲部において埋
設管（ｂ）と膜材（ｇ）とが接触して膜材（ｇ）が破損
するという問題点が生じる。その上、滑材の注入層が厚
くなり、埋設管体の埋設後に該滑材をそのまゝにしてお
くと地盤沈下が生じるために、硬化材と置換しなければ
ならず、その処理に手間を要するという問題点があっ
た。On the other hand, in the latter case, when the backing material as the lubricant is injected into the gap between the membrane material (g) and the buried pipe (b), the buried pipe (b)
When the embedded pipe (b) is brought into contact with the outer peripheral surface of the embedded pipe (b) and the film material (g) moves forward, the forward movement of the embedded pipe (b) causes the film material (g) to rub and break. , Buried pipe (b)
When the method of propelling the curved surface is curved, there is a problem in that the buried pipe (b) and the film material (g) come into contact with each other at the bent portion and the film material (g) is damaged. In addition, the injection layer of the lubricant becomes thick, and if the lubricant is left as it is after burying the buried pipe, ground subsidence will occur.Therefore, it must be replaced with a hardener, which is troublesome. There was a problem that it required.
また、セメント等の硬化性材料と滑材との混合液を裏込
め材として注入することによって硬化性材料の硬化によ
り埋設管（ｂ）の浮上を防止する一方、滑材によって埋
設管（ｂ）の推進を円滑に行わせることも考えられる
が、滑材が埋設管（ｂ）の外周全面に亘って被覆するよ
うに硬化性材料から分離させることは極めて困難であ
り、硬化性材料が埋設管（ｂ）の外周一部に付着した状
態で硬化して管体推進の妨げになるという問題点が生じ
る。Further, by injecting a mixed liquid of a hardening material such as cement and a lubricant as a backfilling material, the hardening of the hardening material prevents the floating of the buried pipe (b), while the lubricant causes the buried pipe (b) to rise. However, it is extremely difficult to separate the lubricant from the curable material so that the lubricant covers the entire outer circumference of the embedded pipe (b). There is a problem that (b) is hardened in a state where it adheres to a part of the outer circumference and hinders the tubular body from propelling.
本発明はこのような問題点を解消することを目的とした
推進工法における裏込注入方法を提供するものである。The present invention provides a backfill injection method in a propulsion construction method for the purpose of solving such problems.
上記目的を達成するために、本発明の推進工法における
裏込注入方法は、シールド機によって地盤を掘削すると
共に該シールド機に後続させて埋設管体を順次接続しな
がら圧入する推進工法において、シールド機の掘進に従
ってシールド機と埋設管体との外径の差によって生じる
空間に硬化性材料を注入し、この硬化性材料を硬化させ
ながらシールド機を掘進させると共に注入した硬化性材
料と埋設管体との間に薄い環状の隙間を生じさせながら
該隙間に滑材を注入して硬化性材料の内周面に直接接す
る薄い滑材層を埋設管体の外周面に形成することを特徴
とするものである。To achieve the above object, the backfill injection method in the propulsion method of the present invention is a propulsion method of excavating the ground by a shield machine and press-fitting it while sequentially connecting the buried pipes to the shield machine. The curable material is injected into the space created by the difference in outer diameter between the shield machine and the buried pipe body as the machine advances, and the curable material and the buried pipe body are injected while the shield machine is dug while curing the curable material. And a lubricant is injected into the gap to form a thin annular gap between the gap and a thin lubricant layer that is in direct contact with the inner peripheral surface of the curable material, and is formed on the outer peripheral surface of the embedded pipe body. It is a thing.
又、この工法において、シールド機から繰り出される不
透水性の筒状膜材によってシールド機に後続する埋設管
体を被覆しながら埋設管体を圧入する場合には、シール
ド機の掘進に従ってシールド機と埋設管体との外径の差
によって生じる空間に上記筒状の不透水性膜材を繰り出
すと共に該不透水性膜材の内周面と埋設管体の外周面と
の間に硬化性材料を注入し、この硬化性材料を硬化させ
ながらシールド機を掘進させると共に注入した硬化性材
料と埋設管体との間に薄い環状の隙間を生じさせながら
該隙間に滑材を注入して硬化性材料の内周面に直接接す
る薄い滑材層を埋設管体の外周面に形成することを特徴
とするものである。Further, in this construction method, when the embedded pipe body is press-fitted while covering the embedded pipe body that follows the shield machine with the impermeable tubular film material fed out from the shield machine, when the embedded machine body is pressed into the shield machine according to the excavation of the shield machine, The tubular impermeable membrane material is fed into the space generated by the difference in outer diameter from the embedded pipe body, and a curable material is provided between the inner peripheral surface of the impermeable membrane material and the outer peripheral surface of the embedded pipe body. The curable material is injected and the shield machine is dug while curing the curable material, and a lubricant is injected into the gap while forming a thin annular gap between the injected curable material and the embedded pipe body. The thin lubricant layer that is in direct contact with the inner peripheral surface of is embedded in the outer peripheral surface of the embedded pipe body.
シールド機の掘進に従ってシールド機と埋設管体との外
径の差によって生じる空間に硬化性材料を注入したの
ち、この硬化性材料と埋設管体との間に薄い環状の隙間
を生じさせながら該隙間に滑材を注入して埋設管体の外
周面に薄い滑材層を形成するものであるから、滑材が地
盤に浸透するのを硬化性材料によって防止することがで
きると共にこの滑材層によって埋設管体の推進抵抗が少
なくなって埋設管体が円滑に推進し、推進距離の長大化
や推進設備の縮小等が図れる。After injecting a curable material into the space caused by the difference in outer diameter between the shield machine and the buried pipe body as the shield machine is dug, a thin annular gap is formed between the curable material and the buried pipe body. Since the lubricant is injected into the gap to form a thin lubricant layer on the outer peripheral surface of the buried pipe, the lubricant can be prevented from penetrating into the ground by the curable material and the lubricant layer As a result, the propulsion resistance of the buried pipe is reduced, the buried pipe is smoothly propelled, and the propulsion distance can be lengthened and the propulsion equipment can be reduced.
さらに、滑材層が薄いために埋設管体が殆ど浮上するこ
となく硬化性材料によって一定位置に保持されると共
に、埋設管体の埋設後においても滑材を硬化材と置換し
なくても地盤の沈下を生じさせる虞れもなく、その置換
作業を省略し得る。In addition, since the embedded lubricant is thin, the embedded pipe hardly floats and is held in a fixed position by the curable material, and even after the embedded pipe is embedded, the lubricant is not replaced with the hardened material. The replacement work can be omitted without the risk of causing subsidence.
また、請求項２に記載したように、シールド機の掘進に
従ってシールド機と埋設管体との外径の差によって生じ
る空間に筒状の不透水性膜材を繰り出せば、この不透水
性膜材によってシールド機に後続する埋設管体内への地
下水の浸入を阻止できると共に不透水性膜材と埋設管体
の外周面間に硬化性材料を注入するものであるから、埋
設管体の直進時においても屈曲施工時においても、埋設
管体の外周面が不透水性膜材に直接、摺接するのを硬化
材材料によって阻止され、不透水性膜材を破損させるこ
となく埋設管体の推進が行える。Further, as described in claim 2, when the tubular impermeable membrane material is fed out into the space generated by the difference in outer diameter between the shield machine and the buried pipe body as the shield machine is dug, the impermeable membrane material is discharged. This prevents groundwater from entering the buried pipe following the shield machine and injects a curable material between the impermeable membrane material and the outer peripheral surface of the buried pipe. Also, even during bending, the hardened material prevents the outer peripheral surface of the embedded pipe from directly sliding on the impermeable membrane material, and the embedded pipe body can be propelled without damaging the impermeable membrane material. .
本発明の実施例を図面について説明すると、（１）は地
盤、（２）は該地盤（１）の適所に掘削、形成した発進
立坑、（３）はその立坑壁で、発進坑口（４）を開設し
てある。An embodiment of the present invention will be described with reference to the drawings. (1) is the ground, (2) is a starting shaft formed by excavating and forming the ground (1) in an appropriate place, (3) is the shaft wall, and the starting hole (4) Has been established.
（５）はシールド機で、そのスキンプレート後部にビニ
ールシート等よりなる長尺の筒状不透水性膜材（６）を
長さ方向に収縮させて格納した格納部（７）を設けてあ
り、該格納部（７）の後端を後方に開口させて不透水性
膜材（６）の出口に形成してある。(5) is a shield machine, and a storage part (7) is provided at the rear part of the skin plate, in which a long tubular impermeable membrane material (6) made of a vinyl sheet or the like is contracted and stored in the longitudinal direction. The rear end of the storage portion (7) is opened rearward and formed at the outlet of the impermeable membrane material (6).
（８）はシールド機（５）の掘削部である。（９）はシ
ールド機（５）に後続する埋設管体で、多数本順次接続
され、立坑（２）に設置した推進ジャッキよりなる押圧
装置（10）によって最後部の管体（９）が押進させられ
るものである。(8) is an excavation part of the shield machine (5). (9) is a buried pipe that follows the shield machine (5), and a large number of pipes are connected in sequence, and the last pipe (9) is pushed by a pressing device (10) consisting of a propulsion jack installed in the shaft (2). It is something that can be advanced.
（11）は坑口（４）に合わせて立坑壁（３）に固着する
リング部材で、不透水性膜材（６）の後端部および環状
パッキン（12）とを立坑壁（３）とこのリング部材（1
1）とで挟着していると共にリング部材（11）の立坑内
側に環状パッキン（13）を水密に固定させてあり、さら
に、このリング部材（11）に、環状パッキン（12）（1
3）の隙間に滑材を注入するための注入パイプ（14）を
取付けてある。（15）はそのパイプ（14）の適所に設け
たバルブである。(11) is a ring member that is fixed to the shaft wall (3) according to the wellhead (4), and the rear end of the impermeable membrane material (6) and the annular packing (12) are connected to the shaft wall (3). Ring member (1
1) and an annular packing (13) is watertightly fixed inside the shaft of the ring member (11), and the ring packing (12) (1) is attached to the ring member (11).
The injection pipe (14) for injecting the lubricant is attached to the gap of 3). (15) is a valve provided at an appropriate position of the pipe (14).
（16）は埋設管体（９）の前端部内周面から外周面に連
通させた注入孔（16a）に連結している硬化性材料注入
パイプで、その適所にバルブ（17）を設けてあり、不透
水性膜材（６）と埋設管体（９）の外周面との間に硬化
性材料を注入するものである。Reference numeral (16) is a curable material injection pipe connected to an injection hole (16a) communicating from the inner peripheral surface of the front end portion of the embedded pipe body (9) to the outer peripheral surface thereof, and a valve (17) is provided at an appropriate position. The curable material is injected between the impermeable membrane material (6) and the outer peripheral surface of the buried pipe body (9).
（40）は最前端の埋設管体（9a）の外周面にモルタル等
で薄く（約5mm）塗布して該埋設管体（9a）を僅かに大
径した塗布層である。Reference numeral (40) is a coating layer in which the embedded pipe body (9a) is thinly applied (about 5 mm) to the outer peripheral surface of the embedded pipe body (9a) at the front end with a small diameter (about 5 mm).
（41）は埋設管体（9a）とそれに後続する埋設管体（9
b）との接続短管で、第３図に示すように、埋設管体（9
a）（9b）の端面に略等しい形状の環状プレート（20）
（20）を並行に配し、両プレート（20）（20）の対向面
内周端間と中央部間とに仕切りリングプレート（21）
（22）を固着、配設してあり、さらに、外周端には埋設
管体（9a）（9b）の対向端部外周に形成した凹所に嵌合
するリング状の鍔部を有する外側リングプレート（23）
を一体に固着してなるものであり、仕切りリングプレー
ト（21）（22）間及び外側の仕切りリングプレート（2
2）と外側リングプレート（23）間にリング状の空間部
（24）（25）を夫々形成してある。(41) is the buried pipe (9a) and the buried pipe (9a) following it.
b) A short pipe connected to the buried pipe (9
a) An annular plate (20) with a shape approximately equal to the end face of (9b)
(20) are arranged in parallel, and the partition ring plate (21) is provided between the inner peripheral ends of the facing surfaces of both plates (20) (20) and between the central parts.
An outer ring having (22) fixedly disposed and further having a ring-shaped brim portion fitted to a recess formed on the outer periphery at the outer periphery of the opposite ends of the buried pipes (9a) and (9b). Plates (23)
And the partition ring plates (2) between the partition ring plates (21, 22) and on the outside.
Ring-shaped spaces (24) (25) are formed between the outer ring plate (23) and the outer ring plate (23).
さらに、仕切りプレート（21）（22）には夫々滑材の注
入口（26）と通口（27）が開設している。又、外側リン
グプレートには、注出口（28）が周方向に一定間隔毎に
或いは連続して設けてある。Further, the partition plates (21) and (22) are respectively provided with an inlet (26) and a through hole (27) for the lubricant. The outer ring plate is provided with spouts (28) at regular intervals or continuously in the circumferential direction.
（29）は通口（27）から注出口（28）に至る間の空間部
（25）に配設した滑材の逆流防止用逆止弁であり、内側
仕切りプレート（21）に穽設した前記注入口（26）から
圧入する滑材（19）の逆流を阻止するものである。Reference numeral (29) is a check valve for preventing backflow of the lubricant, which is arranged in the space (25) between the through hole (27) and the spout (28), and is installed on the inner partition plate (21). The backflow of the lubricant (19) press-fitted from the inlet (26) is prevented.
（30）は滑材注パイプで、注入口（26）に接続してあ
る。（31）は該注入パイプ（30）の適所に設けたバルブ
である。(30) is a lubricant injection pipe, which is connected to the inlet (26). Reference numeral (31) is a valve provided at an appropriate position of the injection pipe (30).
なお、上記筒状不透水性膜材（６）とシールド機（５）
の外径は略等しい径に形成してあり、このシールド機
（５）によって掘削される掘削孔は埋設管体（９）の外
径よりも大径である。The tubular impermeable membrane material (6) and the shield machine (5)
The outer diameters of the two are formed to be substantially equal to each other, and the excavation hole excavated by the shield machine (5) is larger than the outer diameter of the buried pipe body (9).
今、シールド機（５）の掘削部（８）で地盤を掘削しな
がら立坑（２）内でシールド機（５）に後続する管体
（９）の後端を押圧し、シールド機（５）と共に管体
（９）を推進させると、その推進に従ってシールド機
（５）の不透水性膜材格納部（７）から不透水性膜材
（６）が繰り出され、管体（９）を被覆するものである
が、この時、埋設管体（9a）の注入パイプ（16）から注
入口（16a）を通して硬化性材料（18）を不透水性膜材
（６）と管体（９）間に注入する。この時、坑口（４）
に設けた環状パッキン（12）は、管体（９）の外周面に
圧接しているので、硬化性材料（18）は立坑内に漏出す
ることがない。Now, while excavating the ground by the excavation part (8) of the shield machine (5), the rear end of the tubular body (9) following the shield machine (5) is pressed in the shaft (2), and the shield machine (5) is pressed. When the tubular body (9) is propelled together with it, the impermeable membrane material (6) is fed out from the impermeable membrane material storage section (7) of the shield machine (5) in accordance with the propulsion to cover the tubular body (9). At this time, the curable material (18) is passed between the water impermeable membrane material (6) and the pipe body (9) through the injection pipe (16) of the buried pipe body (9a) through the injection port (16a). Inject. At this time, the wellhead (4)
Since the annular packing (12) provided in the pressure contact the outer peripheral surface of the tubular body (9), the curable material (18) does not leak into the shaft.
硬化性材料（18）としては、セメントと砂とを混練した
モルタル、或いはこのモルタルにベントナイトを添加し
た材料や水ガラスと砂との混合物であってもよく、要す
るに注入時には液体状であって注入後、一定時間経過す
れば硬化するものであればよい。なお、モルタルにベン
トナイトを混合しておけば、注入時にモルタルがパイプ
或いはホース内を流動し易くなって好ましい。The curable material (18) may be a mortar in which cement and sand are kneaded, or a material in which bentonite is added to this mortar, or a mixture of water glass and sand. After that, it may be a resin that cures after a certain period of time. It is preferable to mix bentonite with the mortar because the mortar easily flows in the pipe or the hose during injection.
この硬化性材料（18）の注入は、立坑（２）内にミキサ
ー（図示せず）を設置し、ポンプ駆動によって注入パイ
プ（16）に供給するものである。The injection of the curable material (18) is performed by installing a mixer (not shown) in the shaft (2) and supplying it to the injection pipe (16) by driving the pump.
こうして、不透水性膜材（６）と管体（９）間の空間部
に硬化性材料（18）を加圧状態で充満させて不透水性膜
材（６）が管体（９）に摺接しないようにすると共に該
空間部に充満させた硬化性材料（18）の加圧力を地下水
圧と土圧との和よりも大きくして不透水性膜材（６）の
外周面を掘削地盤に押圧させ、地盤（１）の崩壊を防止
する。In this way, the space between the water-impermeable membrane material (6) and the tubular body (9) is filled with the curable material (18) under pressure, and the water-impermeable membrane material (6) becomes the tubular body (9). The outer peripheral surface of the impermeable membrane material (6) is excavated by preventing the sliding contact and making the pressure of the curable material (18) filled in the space larger than the sum of groundwater pressure and earth pressure. It is pressed against the ground to prevent the ground (1) from collapsing.
この硬化性材料（18）は、シールド機（５）が進行して
管体接続管（41）が注入口（16a）から注入された該硬
化性材料（18）の位置まで移動する間に硬化し、次い
で、注入パイプ（30）から接続管（41）の注入口（2
6）、注出口（28）を通じて前記硬化した硬化性材料（1
8）と埋設管体（9b）の外周面間に滑材（19）を圧入す
る。The curable material (18) is cured while the shield machine (5) advances and the tube body connecting pipe (41) moves to the position of the curable material (18) injected from the injection port (16a). Then, from the injection pipe (30) to the injection port (2) of the connecting pipe (41).
6) through the spout (28) to the cured curable material (1
The lubricant (19) is press-fitted between the outer peripheral surface of the buried pipe (9b) and 8).
この時、注出口（28）は接続管（41）の外側リングプレ
ート（23）に周方向に一定間隔毎に或いは連続して開設
されているので、滑材（19）は埋設管体（９）の外周面
に万遍なく注入することができる。又、最前端側の埋設
管体（9a）の外周面にモルタル等の塗布による上記した
約5mm程度の薄肉の拡径部（40）を形成しているので、
この拡径部（40）が前進すると、その後方の埋設管体
（9b）の外周面と硬化性材料の硬化した層の内周面間に
上記薄肉の拡径部（40）に相当する薄い環状の隙間が生
じ、その隙間に滑材（19）を容易に注入、充満させるこ
とができる。At this time, since the spouts (28) are opened in the outer ring plate (23) of the connecting pipe (41) in the circumferential direction at regular intervals or continuously, the lubricant (19) is the buried pipe (9). ) Can be evenly injected onto the outer peripheral surface. Further, since the thinned expanded portion (40) of about 5 mm is formed on the outer peripheral surface of the embedded pipe body (9a) on the frontmost end side by applying mortar or the like,
When the expanded diameter portion (40) advances, a thin portion corresponding to the thin expanded diameter portion (40) is formed between the outer peripheral surface of the buried pipe body (9b) behind the expanded diameter portion (40) and the inner peripheral surface of the cured layer of the curable material. An annular gap is created, and the lubricant (19) can be easily injected and filled into the gap.
この滑材（19）としては、油脂、ベントナイトを主成分
とした粘性の高い水溶液、水を吸収すると球状弾性体と
なる高吸収性高分子（例えば、アクリル酸・ビニルアル
コール共重合体）に水を加えた球状弾性体などが使用さ
れる。As the lubricant (19), oil and fat, an aqueous solution having a high viscosity containing bentonite as a main component, a highly absorbent polymer that becomes a spherical elastic body when absorbing water (for example, an acrylic acid / vinyl alcohol copolymer) and water are used. A spherical elastic body added with is used.
このように、既に不透水性膜材（６）内に注入された硬
化性材料（18）の硬化層の内周面側に滑材（19）を注入
すると、埋設管体（９）と硬化性材料（18）間に滑材
（19）の薄い液膜（上記のように厚みが5mm程度度）が
形成され、この液膜によって埋設管体（９）が円滑に推
進する。また、液膜が極めて薄いために、埋設管体
（９）が殆ど浮上することもなく、硬化した硬化性材料
層によってその埋設位置に保持される。In this way, when the lubricant (19) is injected to the inner peripheral surface side of the hardened layer of the curable material (18) which has already been injected into the impermeable membrane material (6), it is cured with the embedded pipe body (9). A thin liquid film (having a thickness of about 5 mm as described above) of the lubricant (19) is formed between the elastic materials (18), and the embedded film (9) is smoothly propelled by this liquid film. Further, since the liquid film is extremely thin, the embedded pipe body (9) hardly floats, and is held at the embedded position by the cured curable material layer.
なお、上記実施例においては、滑材（19）の注入を硬化
性材料（18）が硬化した後に行ったが、完全に硬化する
前であっても硬化性材料（18）と滑材（19）が混合しな
ければ注入してもよいものであり、又、埋設管体（9a）
にはモルタル等の塗装による薄肉の拡径部（40）を設け
て該埋設管体（9a）に後続する埋設管体（9b）の外周面
と硬化性材料（18）との間に滑材（19）を注入する薄い
環状の隙間を形成するようにしたが、このような拡径部
（40）によることなく、滑材（19）の注入時にその注入
圧力によって硬化性材料（18）を外側に押し拡げること
により薄い環状の隙間を形成しながら滑材（19）を注入
してもよい。Although the lubricant (19) was injected after the curable material (18) was hardened in the above-mentioned examples, the curable material (18) and the lubricant (19) were not even completely cured. ) Can be injected if they are not mixed, and the buried pipe (9a)
Is provided with a thin-walled expanded portion (40) formed by coating mortar or the like, and a lubricant is provided between the outer peripheral surface of the embedded pipe (9b) following the embedded pipe (9a) and the curable material (18). Although a thin annular gap for injecting (19) is formed, the curable material (18) is injected by the injection pressure at the time of injecting the lubricant (19) without relying on the expanded portion (40). The lubricant (19) may be injected while forming a thin annular gap by expanding outward.
又、前記リング部材（11）に不透水性膜材（６）の後端
と一体に前部環状パッキン（12）を固着して、該環状パ
ッキン（12）の内周端部を埋設すべき管体（９）に摺接
させることにより、この前部環状パッキン（12）で硬化
性材料（18）が立坑内に漏出するのを阻止すると共に、
前記実施例においてリング部材（11）に装着した環状パ
ッキン（13）を後部環状パッキンとして、両パッキン
（12）（13）間に注入パイプ（14）を通じて滑材槽（3
2）内の滑材（19）を流入させると、管体（９）の推進
に従って前部環状パッキン（12）を介して滑材（19）を
管体（９）の外周面に薄く塗布するように層着させるこ
とができる。Further, the front annular packing (12) should be fixed to the ring member (11) integrally with the rear end of the impermeable membrane material (6), and the inner peripheral end of the annular packing (12) should be embedded. The front annular packing (12) prevents the curable material (18) from leaking into the vertical shaft by making sliding contact with the tubular body (9).
In the above embodiment, the annular packing (13) mounted on the ring member (11) is used as the rear annular packing, and the injection pipe (14) is passed between the packings (12) and (13) to make the lubricant tank (3
When the lubricant (19) in 2) is flowed in, the lubricant (19) is thinly applied to the outer peripheral surface of the pipe (9) through the front annular packing (12) in accordance with the propulsion of the pipe (9). Can be layered as.
その他の技術構成並びに管体埋設方法は、前記実施例と
同様である。The other technical constitution and the tube burying method are the same as those in the above embodiment.
こうして、シールド機（５）の前進により繰り出される
不透水性膜材（６）内に硬化性材料（18）の注入と、該
硬化性材料（18）の注入後における滑材（19）の注入を
行いながらシールド機（５）を掘進させると共に発進立
坑（２）側で管体（９）を順次継き足して行き、発進立
坑（２）と到達立坑（図示せず）間に一連の管体（９）
を埋設するものである。In this way, the curable material (18) is injected into the impermeable membrane material (6) fed out by the advance of the shield machine (5), and the lubricant (19) is injected after the curable material (18) is injected. The shield machine (5) is excavated while performing the operation, and the pipe body (9) is successively added on the side of the starting shaft (2), and a series of pipes are provided between the starting shaft (2) and the reaching shaft (not shown). Body (9)
Is to be buried.
なお、上記実施例においては、埋設管体と地盤との間に
不透水性膜材（６）が介在する場合について述べたが、
本発明においては、不透水性膜材（６）を介在させない
場合についても適応できることは勿論である。In addition, in the said Example, although the impermeable membrane material (6) intervenes between the buried pipe and the ground, it was described.
Of course, the present invention can be applied to the case where the water-impermeable membrane material (6) is not interposed.
（発明の効果） 以上のように本発明の推進工法における裏込注入方法に
よれば、シールド機の掘進に従ってシールド機と埋設管
体との外径の差によって生じる空間に硬化性材料を注入
したのち、この硬化性材料と埋設管体との間に薄い環状
の隙間を生じさせながら該隙間に滑材を注入して埋設管
体の外周面に薄い滑材層を形成するものである。滑材が
地盤に浸透するのを硬化性材料によって防止することが
できると共にこの滑材層によって埋設管体の推進抵抗が
少なくなって埋設管体を円滑に推進させることができ、
推進距離の長大化、推進設備の縮小、小型化を図ること
ができるものであるから、 さらに、硬化性材料と埋設管体との間に注入する滑材層
が極めて薄いために埋設管体の浮上を硬化性材料によっ
て抑止させて該埋設管体を正確な埋設位置に保持するこ
とができ、その上、埋設管体の埋設後においても滑材を
硬化材と置換しなくても地盤の沈下が生じる虞れもな
く、従ってその置換作業を省略することができて作業能
率の向上を図ることができるものである。(Effects of the Invention) As described above, according to the backfill injection method in the propulsion method of the present invention, the curable material is injected into the space generated by the difference in outer diameter between the shield machine and the buried pipe body as the shield machine is dug. After that, a lubricant is injected into the gap while forming a thin annular gap between the curable material and the embedded pipe to form a thin lubricant layer on the outer peripheral surface of the embedded pipe. It is possible to prevent the lubricant from penetrating into the ground by the curable material, and the lubricant layer reduces the propulsion resistance of the embedded pipe, which allows the embedded pipe to be smoothly propelled.
Since the propulsion distance can be lengthened, the propulsion equipment can be reduced, and the size can be reduced, further, since the lubricant layer injected between the curable material and the embedded pipe body is extremely thin, the embedded pipe body Floating can be suppressed by a curable material and the buried pipe can be held at an accurate buried position. Moreover, even after the buried pipe is buried, the subsidence of the ground without replacing the lubricant with the hardening material. Therefore, the replacement work can be omitted and the work efficiency can be improved.
また、請求項２に記載したように、シールド機の掘進に
従ってシールド機と埋設管体との外径の差によって生じ
る空間に筒状の不透水性膜材を繰り出せば、この不透水
性膜材によってシールド機に後続する埋設管体内への地
下水の浸入を阻止できると共に不透水性膜材と埋設管体
の外周面間に硬化性材料を注入するものであるから、埋
設管体の直進施工時においても屈曲施工時においても、
埋設管体の外周面が不透水性膜材に直接、摺接するのを
硬化性材料によって阻止され、不透水性膜材を破損させ
ることなく埋設管体の推進が行えるものである。Further, as described in claim 2, when the tubular impermeable membrane material is fed out into the space generated by the difference in outer diameter between the shield machine and the buried pipe body as the shield machine is dug, the impermeable membrane material is discharged. This prevents the entry of groundwater into the buried pipe that follows the shield machine and injects a curable material between the impermeable membrane material and the outer peripheral surface of the buried pipe. Even when bending and
The curable material prevents the outer peripheral surface of the embedded pipe from directly sliding on the impermeable membrane material, and the embedded pipe body can be propelled without damaging the impermeable membrane material.
図面は本発明の実施例を示すもので、第１図はその施工
状態を示す簡略縦断側面図、第２図は坑口部の拡大断面
図、第３図は注入孔部の拡大断面図、第４図は従来の施
工方法を示す簡略縦断面図である。 （１）……地盤、（２）……発進立坑、（５）……シー
ルド機、（６）……筒状不透水性膜材、（９）……埋設
管体、（14）（16）……注入パイプ、（18）……硬化性
材料、（19）……滑材。The drawings show an embodiment of the present invention. FIG. 1 is a simplified vertical sectional side view showing the construction state, FIG. 2 is an enlarged sectional view of a wellhead, and FIG. 3 is an enlarged sectional view of an injection hole. FIG. 4 is a simplified vertical sectional view showing a conventional construction method. (1) ...... Ground, (2) ...... Starting shaft, (5) ...... Shield machine, (6) ...... Cylindrical impermeable membrane material, (9) ...... Buried pipe body, (14) (16 ) …… Injection pipe, (18) …… Curable material, (19) …… Sliding material.
Claims (2)
該シールド機に後続させて埋設管体を順次接続しながら
圧入する推進工法において、シールド機の掘進に従って
シールド機と埋設管体との外径の差によって生じる空間
に硬化性材料を注入し、この硬化性材料を硬化させなが
らシールド機を掘進させると共に注入した硬化性材料と
埋設管体との間に薄い環状の隙間を生じさせながら該隙
間に滑材を注入して硬化性材料の内周面に直接接する薄
い滑材層を埋設管体の外周面に形成することを特徴とす
る推進工法における裏込注入方法。1. A propulsion method of excavating the ground by a shield machine and press-fitting it while sequentially connecting the buried pipes to the shield machine, in which the outer diameters of the shield machine and the buried pipe are changed according to the excavation of the shield machine. The curable material is injected into the space generated by the difference, the shield machine is dug while curing the curable material, and a thin annular gap is formed between the injected curable material and the embedded pipe body in the gap. A backfill injection method in a propulsion method, characterized in that a lubricant is injected to form a thin lubricant layer that is in direct contact with the inner peripheral surface of a curable material on the outer peripheral surface of a buried pipe.
該シールド機から繰り出される筒状の不透水性膜材によ
ってシールド機に後続する埋設管体を被覆しながら埋設
管体を圧入する推進工法において、シールド機の掘進に
従ってシールド機と埋設管体との外径の差によって生じ
る空間に上記筒状の不透水性膜材を繰り出すと共に該不
透水性膜材の内周面と埋設管体の外周面との間に硬化性
材料を注入し、この硬化性材料を硬化させながらシール
ド機を掘進させると共に注入した硬化性材料と埋設管体
との間に薄い環状の隙間を生じさせながら該隙間に滑材
を注入して硬化性材料の内周面に直接接する薄い滑材層
を埋設管体の外周面に形成することを特徴とする推進工
法における裏込注入方法。2. A propulsion method of excavating the ground by a shield machine and press-fitting the embedded pipe body while covering the embedded pipe body following the shield machine with a tubular impermeable membrane material fed from the shield machine, As the shield machine is dug, the tubular impermeable membrane material is fed into a space created by the difference in outer diameter between the shield machine and the embedded pipe body, and the inner peripheral surface of the impermeable membrane material and the outer peripheral surface of the embedded pipe body. A curable material is injected between the two, and the shield machine is dug while curing the curable material, and a thin annular gap is formed between the injected curable material and the embedded pipe body, and a slidable gap is formed in the gap. A backfill injection method in a propulsion method, characterized in that a thin lubricant layer that is in direct contact with the inner peripheral surface of the curable material is formed on the outer peripheral surface of the buried pipe body by injecting the material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63055829A JPH0663432B2 (en) | 1988-03-09 | 1988-03-09 | Backfill injection method in propulsion method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63055829A JPH0663432B2 (en) | 1988-03-09 | 1988-03-09 | Backfill injection method in propulsion method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01230895A JPH01230895A (en) | 1989-09-14 |
| JPH0663432B2 true JPH0663432B2 (en) | 1994-08-22 |
Family
ID=13009855
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63055829A Expired - Lifetime JPH0663432B2 (en) | 1988-03-09 | 1988-03-09 | Backfill injection method in propulsion method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0663432B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100957117B1 (en) * | 2009-10-30 | 2010-05-13 | (주)케이지엔지니어링 | Propulsion method using separate lubricant supply type underground propulsion pipe |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4655875B2 (en) * | 2005-10-21 | 2011-03-23 | 株式会社大林組 | Deformation following water shielding material and method for producing deformation following water shielding material |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5820913Y2 (en) * | 1975-10-21 | 1983-05-02 | 株式会社新潟鐵工所 | Yusou Kannorouei Kenchikenkakusanboshisouchi |
| JPS55142230A (en) * | 1979-04-24 | 1980-11-06 | Toshiba Corp | Detector for leakage from pipe of nuclear reactor |
| JPS5821535A (en) * | 1981-07-31 | 1983-02-08 | Toshiba Corp | Detector for leakage in lining tank |
-
1988
- 1988-03-09 JP JP63055829A patent/JPH0663432B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100957117B1 (en) * | 2009-10-30 | 2010-05-13 | (주)케이지엔지니어링 | Propulsion method using separate lubricant supply type underground propulsion pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01230895A (en) | 1989-09-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0663432B2 (en) | Backfill injection method in propulsion method | |
| JP2001254588A (en) | Arrival portal wall of pipe jacking method | |
| JPH0367193B2 (en) | ||
| JPH0332621Y2 (en) | ||
| JPH04146398A (en) | Laying of pipeline through embankment | |
| JPH0344627B2 (en) | ||
| JP2954271B2 (en) | Crack injection method | |
| JPH0517359B2 (en) | ||
| JPH06100062B2 (en) | Propulsion method and joints for propulsion method | |
| JP3736920B2 (en) | Screw joint type propulsion pipe and anticorrosion method for screw joint type propulsion pipe | |
| JP3507174B2 (en) | Tunnel excavation wall lining method and apparatus | |
| JPH0261600B2 (en) | ||
| JPH08239654A (en) | Lubricant and pipe jacking and embedding method using the same | |
| JPH0232438B2 (en) | ||
| JPH0645515Y2 (en) | Starter shaft equipment for corrugated pipe | |
| JP3542657B2 (en) | Lining equipment used for tunnel lining method | |
| JPS5834720B2 (en) | Method for preventing water leakage at joints of buried branch pipes | |
| JP3383048B2 (en) | Pipe laying method | |
| JP2003090460A (en) | Method for burying pipeline and sealing means used for the same | |
| JP2001173085A (en) | Pipeline regenerating construction method | |
| JPS61137999A (en) | Back injection of shield construction method | |
| JPH0243872B2 (en) | SHOKEIKANSUISHINMAISETSUKOHONIOKERUSONYUTANBUSHISUIHOHO | |
| JP2000008770A (en) | Pipe propulsion machine | |
| JPH02240397A (en) | Water stopper at entrance in shield construction work | |
| JPH047279Y2 (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| EXPY | Cancellation because of completion of term | ||
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080822 Year of fee payment: 14 |