JPH04161597A - Concrete placing metheod in directly placed concrete lining method - Google Patents

Concrete placing metheod in directly placed concrete lining method

Info

Publication number
JPH04161597A
JPH04161597A JP2283276A JP28327690A JPH04161597A JP H04161597 A JPH04161597 A JP H04161597A JP 2283276 A JP2283276 A JP 2283276A JP 28327690 A JP28327690 A JP 28327690A JP H04161597 A JPH04161597 A JP H04161597A
Authority
JP
Japan
Prior art keywords
concrete
lining concrete
excavated
peripheral
excavated ground
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
Application number
JP2283276A
Other languages
Japanese (ja)
Other versions
JP2757075B2 (en
Inventor
Hiramasa Aokage
平昌 青景
Yuji Ito
祐二 伊藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujita Corp
Original Assignee
Fujita Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fujita Corp filed Critical Fujita Corp
Priority to JP2283276A priority Critical patent/JP2757075B2/en
Publication of JPH04161597A publication Critical patent/JPH04161597A/en
Application granted granted Critical
Publication of JP2757075B2 publication Critical patent/JP2757075B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Lining And Supports For Tunnels (AREA)

Abstract

PURPOSE:To make it possible to suppress the generation of temperature cracking in lining concrete by injecting a low strength rapid hardening hardener between the tail plate and the peripheral excavated ground before force-fit of the lining concrete is made. CONSTITUTION:An internal form 2 is built-up in a tunnel hole 1 excavated by a shield excavator. After that, a low strength rapid hardening hardener 8 such as bubble mortar with low strength is injected between the tail plate 7 of the shield excavator and the peripheral excavated ground 6. After that, the force-fit of the lining concrete 10 is made between the internal form 2 and the peripheral excavated ground 6. According to the constitution, the uneveness on the peripheral excavated ground 6 is eliminated, the construction joint face with the lining concrete 10 is formed smoothly, the concentration of temperature stress is prevented, and the restriction of the lining concrete by the peripheral excavated ground 6 can be reduced.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明はシールド掘削機によるトンネル構築時に適用さ
れる直打ちコンクリートライニング工法におけるコンク
リート打設方法に係るものである。
DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for placing concrete in a direct concrete lining method applied when constructing a tunnel using a shield excavator.

(従来の技術) 従来この種の工法においては、シールド掘削機によって
掘削された周辺地盤の沈下を防止するため、同シールド
掘削機によって掘進されたトンネル穴内に組立てられた
内型枠と周辺掘削地盤との間にコンクリートを圧入して
いる。
(Conventional technology) Conventionally, in this type of construction method, in order to prevent the surrounding ground excavated by the shield excavator from sinking, the inner formwork and the surrounding excavated ground were assembled inside the tunnel hole excavated by the shield excavator. Concrete is pressed in between.

(発明が解決しようとする課題) この場合、前記圧入コンクリートと周辺掘削地盤との密
着性がよく、山岳トンネルのように地盤の拘束が大きい
場合には、コンクリートにひび割れが発生し易いのが実
情である。
(Problem to be Solved by the Invention) In this case, the adhesion between the press-fit concrete and the surrounding excavated ground is good, and the reality is that cracks are likely to occur in the concrete when the ground is highly constrained, such as in a mountain tunnel. It is.

このようなひび割れ発生の原因の1つとして、直打ちさ
れたライニングコンクリ−1〜の温度変化に伴う伸縮を
、周辺掘削地盤が拘束することが挙げられる。
One of the causes of such cracks is that the surrounding excavated ground restrains the directly cast lining concrete 1 from expanding and contracting due to temperature changes.

本発明は前記従来技術の有する問題点に鑑メて提案され
たもので、その目的とする処は、ライニングコンクリー
トの温度ひび割れの発生が抑制される直打ちコンクリー
トライニング工法におけるコンクリート打設方法を提供
する点にある。
The present invention has been proposed in view of the problems of the prior art, and its purpose is to provide a method for placing concrete in a direct concrete lining method that suppresses the occurrence of temperature cracks in the lining concrete. It is in the point of doing.

(課題を解決するだめの手段) 前記の目的を達成するため、本発明に係る直打ちコンク
リートライニング工法におけるコンクリート打設方法に
よれば、直打ちコンクリートライニングエ法において、
ライニングコンクリートを圧入する前に、シールド掘削
機のテールプレートと周辺掘削地盤との間に、低強度の
急硬性硬化材をン主人するものである。
(Means for solving the problem) In order to achieve the above object, according to the concrete placing method in the direct pour concrete lining method according to the present invention, in the direct pour concrete lining method,
Before press-fitting the lining concrete, a low-strength, rapidly hardening material is inserted between the tail plate of the shield excavator and the surrounding excavated ground.

(作用) 本発明によれは、シールド掘削機によって掘進されたト
ンネル内に組立てられた内型枠と、シールド掘削機によ
る周辺掘削地盤の間にライニングコンクリート タルの如き低強度の急,硬性硬化材をシールド掘削機の
テールプレーートと同掘削機による周辺掘削地盤との間
に注入するので、前記硬化材によって同周辺掘削地盤面
の凹凸がなくなり、コンクリートとの打継面が平滑面に
形成され、温度応力の集中が防止される。更に周辺掘削
地盤とライニングコンクリートとの間に低強度層が介在
することによって、周辺掘削地盤によるライニングコン
クリートの拘束が低減され、同ライニングコンクリート
の温度ひび割れの発生が抑制される。
(Function) According to the present invention, a low-strength, rapidly hardened material such as a lining concrete barrel is provided between the inner formwork assembled in the tunnel excavated by the shield excavator and the surrounding ground excavated by the shield excavator. is injected between the tail plate of the shield excavator and the surrounding ground excavated by the same excavator, so the hardening material eliminates the unevenness of the surrounding excavated ground surface, forms a smooth joint surface with concrete, and lowers the temperature. Stress concentration is prevented. Furthermore, by interposing the low-strength layer between the surrounding excavated ground and the lining concrete, the restraint of the lining concrete by the surrounding excavated ground is reduced, and the occurrence of temperature cracks in the lining concrete is suppressed.

(実施例) 以下本発明を図示の実施例について説明する。(Example) The present invention will be described below with reference to the illustrated embodiments.

(])はシールド掘削機によって掘進されたI・ンネル
穴、(2)は同掘削a(1)の後方においてトンネル穴
(1)内に組立てられた内型枠、(3)はシールド掘削
機に装架されたライニングコンクリートのプレスジヤツ
キ、(4)は同プレスジヤツキ(3)先端のプレスリン
グ、(5)は前記内型枠(2)に配設されたライニング
コンクリートの打設口である。
( ) is the tunnel hole excavated by the shield excavator, (2) is the inner formwork assembled in the tunnel hole (1) behind the excavation a (1), (3) is the shield excavator (4) is a press ring at the tip of the press jack (3), and (5) is a lining concrete casting opening provided in the inner form (2).

而して前記内型枠(2)とシールド掘削[による周辺掘
削地盤(6)との間にシールド掘削機のテールプレー1
・(7)が前進する前に、同テールプレート(7)と周
辺掘削地盤(6)との間隙に気泡コンクリ−1〜の如き
低強度急硬性硬化材(8)を同硬化+1の注入口(9)
を介して注入する。
Therefore, the tail play 1 of the shield excavator is placed between the inner formwork (2) and the surrounding ground (6) excavated by the shield excavation.
・Before (7) moves forward, inject a low-strength, rapidly hardening material (8) such as cellular concrete 1 to hardening +1 into the gap between the tail plate (7) and the surrounding excavated ground (6). (9)
Inject via.

なお同硬化材(9)は強度が高いとシールド掘削機の掘
進抵抗が大きくなるため、強度を数kgf/afl以下
と低くする必要がある。
Note that if the hardening material (9) has high strength, the digging resistance of the shield excavator will increase, so the strength must be as low as several kgf/afl or less.

前記硬化材(9)の注入後、シールド掘削機の前進と併
行して前記打設口(5)より内型枠(2)と周辺掘削地
盤(6)との間にライニングコンクリ−1−(10)を
打設する。
After injecting the hardening material (9), a lining concrete 1-( 10).

図示の実施例は前記したように構成されているので、前
記硬化材(8)によって周辺掘削地盤(6)の凹凸面が
なくなり、ライニングコンクリ−1−(10)との打継
面が平滑になり、温度応力の集中が防止され、周辺掘削
地盤(6)とライニングコンクリ−1−(10)との間
に低強度急硬性硬化材(8)が介在することによって、
ライニングコンクリート(10)に対する周辺掘削地盤
(6)の拘束が低減し、ライニングコンクリ−l−の温
度ひび割れの発生が抑制される。
Since the illustrated embodiment is constructed as described above, the hardening material (8) eliminates the uneven surface of the surrounding excavated ground (6) and makes the joint surface with the lining concrete 1-(10) smooth. This prevents the concentration of temperature stress, and the presence of the low-strength rapidly hardening material (8) between the surrounding excavated ground (6) and the lining concrete 1-(10),
The restraint of the surrounding excavated ground (6) on the lining concrete (10) is reduced, and the occurrence of temperature cracks in the lining concrete is suppressed.

(発明の効果) 本発明によれば前記したように、直打ちライニングコン
クリ−1・工法において、ライニングコンクリートを打
設する前に、シールド掘削機のテールプレートと周辺掘
削地盤との間に、低強度の急硬性硬化材を注入して掘削
面の凹凸をな(して平滑面を形成するとともに、ライニ
ングコンクリ−1−と周辺掘削地盤との間に低強度層を
介在せしめることによって、周辺掘削地盤のライニング
コンクリートに対する拘束力を低減し、同ライニングコ
ンクリートの温度ひび割れの発生を抑制する。
(Effects of the Invention) According to the present invention, as described above, in the direct lining concrete method 1, before placing lining concrete, a low By injecting a strong, rapidly hardening material to make the excavation surface uneven (to form a smooth surface), and by interposing a low-strength layer between the lining concrete 1- and the surrounding excavation ground, the surrounding excavation It reduces the binding force of the ground on the lining concrete and suppresses the occurrence of temperature cracks in the lining concrete.

またライニングコンクリ−I・を圧入したときにシール
ド掘削機のテールプレートと周辺掘削地盤との間にコン
クリートが侵入する倶れがなく、更にライニングコンク
リートの打設量を一定とすることができる。
Furthermore, when the lining concrete I is press-fitted, there is no possibility that concrete will enter between the tail plate of the shield excavator and the surrounding excavated ground, and furthermore, the amount of lining concrete placed can be kept constant.

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

第1図は本発明に係る直打ちコンクリートライニング工
法におけるコンクリート打設方法の一実施例の実施状況
を示す縦断側面図、第2図及び第3図は夫々第1図の矢
視■−■図、並に矢視■−■図である。 (1)・・・トンネル穴、  (2)・・・内型枠、(
6)・・・周辺掘削地盤、 (7)・・テールプレート
、(8)・・・低強度急硬性硬化材、 (10)・・・ライニングコンクリート。 代理人 弁理士 岡 本 重 文 外1名 /:トラネル穴         6:2:内型P  
              7二3:フ0レスシNツ
キ          8;4:ブレスリンタ゛9: 5:ライニレグコ)グヲートの  10:打設口 L■7 同辺掘削地盤 テールプし一ト 低強度急硬性硬化材 急石か1咋石カイヒオオの注尺ロ ライニレグコンクリート
Fig. 1 is a longitudinal side view showing the implementation status of one embodiment of the concrete placing method in the direct concrete lining method according to the present invention, and Figs. 2 and 3 are views taken along the arrows ■-■ in Fig. 1, respectively. , and the arrow view ■-■. (1)...Tunnel hole, (2)...Inner formwork, (
6) ... Surrounding excavated ground, (7) ... Tail plate, (8) ... Low-strength rapidly hardening material, (10) ... Lining concrete. Agent: Patent attorney: Shige Okamoto, 1 extra person/: Tranel hole 6:2: Internal mold P
723:FresshiN Tsuki 8;4:Breathlinter 9:5:Rainy Legco) Guoto's 10:Pouring opening L Kaihio Ishi's Jake Roll Rolaini Leg Concrete

Claims (1)

【特許請求の範囲】[Claims] 直打ちコンクリートライニング工法において、ライニン
グコンクリートを圧入する前に、シールド掘削機のテー
ルプレートと周辺掘削地盤との間に、低強度の急硬性硬
化材を注入することを特徴とする直打ちコンクリートラ
イニング工法におけるコンクリート打設方法
A direct-cast concrete lining method that is characterized by injecting a low-strength, rapidly hardening material between the tail plate of a shield excavator and the surrounding excavated ground before press-fitting the lining concrete. Concrete placement method in
JP2283276A 1990-10-23 1990-10-23 Concrete placement method in direct-cast concrete lining method Expired - Fee Related JP2757075B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2283276A JP2757075B2 (en) 1990-10-23 1990-10-23 Concrete placement method in direct-cast concrete lining method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2283276A JP2757075B2 (en) 1990-10-23 1990-10-23 Concrete placement method in direct-cast concrete lining method

Publications (2)

Publication Number Publication Date
JPH04161597A true JPH04161597A (en) 1992-06-04
JP2757075B2 JP2757075B2 (en) 1998-05-25

Family

ID=17663362

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2283276A Expired - Fee Related JP2757075B2 (en) 1990-10-23 1990-10-23 Concrete placement method in direct-cast concrete lining method

Country Status (1)

Country Link
JP (1) JP2757075B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114592887A (en) * 2022-03-14 2022-06-07 中国水利水电科学研究院 Water delivery tunnel lining expansion joint process design method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63107696A (en) * 1986-10-23 1988-05-12 佐藤工業株式会社 Method of tunnel construction

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63107696A (en) * 1986-10-23 1988-05-12 佐藤工業株式会社 Method of tunnel construction

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114592887A (en) * 2022-03-14 2022-06-07 中国水利水电科学研究院 Water delivery tunnel lining expansion joint process design method
CN114592887B (en) * 2022-03-14 2023-05-09 中国水利水电科学研究院 Design method for joint-joining process of expansion joint of lining of water delivery tunnel

Also Published As

Publication number Publication date
JP2757075B2 (en) 1998-05-25

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