JPH0429839B2 - - Google Patents
Info
- Publication number
- JPH0429839B2 JPH0429839B2 JP59011460A JP1146084A JPH0429839B2 JP H0429839 B2 JPH0429839 B2 JP H0429839B2 JP 59011460 A JP59011460 A JP 59011460A JP 1146084 A JP1146084 A JP 1146084A JP H0429839 B2 JPH0429839 B2 JP H0429839B2
- Authority
- JP
- Japan
- Prior art keywords
- excavation
- bit
- cutter
- concrete
- reinforced concrete
- 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
- 238000009412 basement excavation Methods 0.000 claims description 46
- 239000004567 concrete Substances 0.000 claims description 28
- 239000011150 reinforced concrete Substances 0.000 claims description 27
- 230000003014 reinforcing effect Effects 0.000 claims description 27
- 238000005520 cutting process Methods 0.000 claims description 26
- 239000004576 sand Substances 0.000 claims description 15
- 238000010586 diagram Methods 0.000 description 13
- 238000010276 construction Methods 0.000 description 10
- 239000000126 substance Substances 0.000 description 10
- 238000002347 injection Methods 0.000 description 8
- 239000007924 injection Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 239000002689 soil Substances 0.000 description 5
- 102100027340 Slit homolog 2 protein Human genes 0.000 description 2
- 101710133576 Slit homolog 2 protein Proteins 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 229910000601 superalloy Inorganic materials 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
Description
【発明の詳細な説明】
本発明は機械式シールドによる鉄筋コンクリー
ト掘削装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a reinforced concrete excavation device with a mechanical shield.
都市トンネルにおけるシールド工法では手掘
り、圧気による掘削や機械式シールドによる掘削
方法が採用されている。 The shield construction methods used in urban tunnels include manual excavation, excavation using pressurized air, and excavation methods using mechanical shields.
都市部ではシールド工事計画路線上にビルの鉄
筋コンクリート製の杭や鋼材等の障害物が存在す
る場合がある。 In urban areas, there may be obstacles such as reinforced concrete piles or steel materials from buildings on the planned shield construction route.
このような場合、手掘式シールドでは第１図に
示すように、ムーバブルフードａのうち鉄筋コン
クリート製の杭ｂに当たらぬものを切羽ｃに貫入
させ、上段デツキｄも前進させ、上部角落しを外
して排土する。切羽が進行するに伴い、ムーバブ
ルフードａを限界まで突出し切羽ｃを押えて、ム
ーバブルフードａと上段デツキｄとの間に露出し
た杭ｂを切断する。次いで第２図に示すように上
段デツキｄ先端の杭ｂのない部分にアタツチメン
トｅをつけて切羽ｃを押え、掘削排土して上段デ
ツキｄとその下側のデツキとの間に杭ｂを露出さ
せ切断する。以上の操作を繰り返し、杭ｂをシー
ルド全断面にわたり除去している。 In such a case, with a hand-dug shield, as shown in Figure 1, the part of the movable hood a that does not hit the reinforced concrete pile b is penetrated into the face c, the upper deck d is also moved forward, and the upper corner is cut off. Remove and dispose of soil. As the face progresses, the movable hood a is pushed out to its limit and the face c is pressed down to cut the pile b exposed between the movable hood a and the upper deck d. Next, as shown in Figure 2, an attachment e is attached to the part of the tip of the upper deck d where there is no pile b to hold down the face c, the earth is excavated and removed, and a pile b is placed between the upper deck d and the deck below it. Expose and cut. By repeating the above operations, the piles b are removed over the entire cross section of the shield.
又、機械式シールドｆの場合には、第３図に示
す通常土砂掘削用のビツトｇでは鉄筋を切断する
ことができないため、カツタ後部隔壁及びカツタ
フエースｋを切羽ｃに作業者が出られるような構
造とし、鉄筋コンクリート製の杭ｂを切羽ｃで人
力により処理している。 In addition, in the case of a mechanical shield f, since the reinforcing bars cannot be cut with the ordinary bit g for earth and sand excavation shown in Fig. 3, the cutter rear bulkhead and cutter ace k must be moved to the face c so that the worker can get out. The structure is such that reinforced concrete piles b are manually processed at face c.
従つて、鉄筋コンクリート製の杭ｂはいずれも
人力で切断除去するため多大の労力を必要とし且
つ作業時間も長くなり工期の延長の原因となる。 Therefore, all of the reinforced concrete piles b are cut and removed by hand, which requires a great deal of labor and requires a long working time, resulting in an extension of the construction period.
又、作業者が切羽ｃに出て作業する場合には、
切羽ｃからの土砂の流入を防止する必要があるた
め、切羽ｃに安定化用の薬液を注入するか或いは
凍結工法を施工しなければならない。これらの薬
液注入工法、凍結工法は莫大な費用がかかり施工
費用増大の一因となる。 In addition, when workers go out to face c to work,
Since it is necessary to prevent the inflow of earth and sand from the face c, it is necessary to inject a stabilizing chemical into the face c or use a freezing method. These chemical injection methods and freezing methods are extremely expensive and contribute to increased construction costs.
又、杭ｂが出現するのは一般に地上に構造物が
ある場所の地下であるため、薬液注入等の施工が
困難であるか或は出来たとしても不完全で土質に
よつては切羽ｃの安定が完全に保てず、作業者が
切羽ｃに出ることが非常に危険となる場合があ
る。 In addition, since piles b generally appear underground where there is a structure above ground, it may be difficult to perform chemical injection, etc., or even if it is possible, it may be incomplete and depending on the soil quality, it may be difficult to perform construction such as injection of chemicals. There are cases where complete stability cannot be maintained and it is extremely dangerous for workers to come out onto face c.
更に、機械式シールドで掘削を開始する場合、
機械式シールドを地下の所定の深さに設置する必
要があるので、第４図に示すように鉄筋コンクリ
ート壁ｉで立杭ｊを予め作り、機械式シールドｆ
を設置し、発進時に掘削方向の鉄筋コンクリート
壁i′を人力で破壊している。この立杭ｊの鉄筋コ
ンクリート壁i′の破壊作業も前述と同様に薬液注
入工法等を施工したうえで人力により行なつてい
るため、莫大な費用と長い作業時間を要してい
る。 Furthermore, when starting excavation with a mechanical shield,
Since it is necessary to install the mechanical shield at a predetermined depth underground, a vertical pile j is made in advance from a reinforced concrete wall i, as shown in Figure 4, and the mechanical shield f is
A reinforced concrete wall i′ in the excavation direction is destroyed manually when the machine starts. Destruction of the reinforced concrete wall i' of the standing pile j is also carried out manually using the same chemical injection method as described above, which requires a huge amount of cost and a long time.
本発明は上述の従来の機械式シールド工法の欠
点を除去する目的でなしたもので、回転可能なカ
ツタ前面に、超硬合金チツプをビツトシヤンクに
取り付けてなるコンクリート掘削用ビツトと、超
硬合金チツプ粒をビツトシヤンクに溶着してなる
鉄筋切削用ビツトとを、土砂掘削用ビツトの高さ
よりも所要の高さ高く、且つカツタの回転中心を
中心とする複数の同心円周上に夫々少なくとも２
個宛周方向等間隔位置に配設し、更に推進ジヤツ
キに低速掘進用の制御装置を設けて低速での速度
制御を可能としたことを特徴とする機械式シール
ドによる鉄筋コンクリート掘削装置にかかるもの
である。 The present invention was made for the purpose of eliminating the drawbacks of the conventional mechanical shield method described above, and includes a concrete excavation bit in which a cemented carbide chip is attached to a bit shank on the front surface of a rotatable cutter, and a cemented carbide chip. A reinforcing bar cutting bit made by welding grains to a bit shank is installed at a required height higher than the height of the earth and sand excavation bit, and at least two times each on a plurality of concentric circles centered on the rotation center of the cutter.
This invention relates to a reinforced concrete excavation device using a mechanical shield, which is arranged at equal intervals in the circumferential direction, and is further equipped with a control device for low-speed excavation on the propulsion jack to enable speed control at low speed. be.
以下、本発明の実施例を図面を参照しつつ説明
する。 Embodiments of the present invention will be described below with reference to the drawings.
第５図は本発明のカツタ７の一例を示すもので
あり、１は図示していない駆動装置により回転さ
れるカツタ面板、２は該カツタ面板１に放射状に
所要数設けられたカツタスリツト、３は該各カツ
タスリツト２の中央に位置するカツタスポーク、
４は該カツタスポーク３の両側に所要の間隔で設
けた土砂掘削用ビツトである。 FIG. 5 shows an example of the cutter 7 of the present invention, where 1 is a cutter face plate rotated by a drive device (not shown), 2 is a required number of cutter slits provided radially on the cutter face plate 1, and 3 is a cutter face plate rotated by a drive device (not shown). a cutter spoke located in the center of each cutter slit 2;
Reference numeral 4 designates earth and sand excavation bits provided on both sides of the cutter spoke 3 at a required interval.
該土砂掘削用ビツト４は、第６図及び第７図に
示すように所定の推進方向の高さH1を有してお
り、カツタスリツト２側に張り出した頂部５に肉
盛してチツプ６を溶接してあり、カツタ７外周部
では掘削土量が多くカツタ７中心に近くなるにつ
れて掘削土量が減少するため、外周部は多条掘削
配置とし、中心近くは掘削条数を１条にする等、
外周部と比較して条数を落として配置し、各土砂
掘削用ビツト４の１個当りの仕事が略等しくなる
ようにしてある。 The earth and sand excavating bit 4 has a predetermined height H1 in the propulsion direction as shown in FIGS. It is welded, and the amount of excavated soil is large at the outer periphery of the cutter 7, and the amount of excavated soil decreases as it approaches the center of the cutter 7. Therefore, the outer periphery is arranged with multiple excavations, and the number of excavations near the center is one. etc,
The number of threads is reduced compared to the outer periphery so that the work of each earth and sand excavation bit 4 is approximately equal.
更に、前記カツタ面板１のカツタ７の回転中心
を中心とする同心円周上に１つの円周につき少な
くとも２個ずつ周方向等間隔位置に配置するよう
にしたコンクリート掘削用ビツト８を、各同心円
周が半径方向に所定の間隔となるよう夫々配設す
ると共に、前記各同心円周の間に鉄筋切削用ビツ
ト９を１つの同心円周につき少なくとも２個ずつ
周方向等間隔位置になるように夫々配設してあ
る。 Furthermore, at least two concrete excavation bits 8 are arranged at equal intervals in the circumferential direction on concentric circles centered on the rotation center of the cutter 7 of the cutter face plate 1, and are placed on each concentric circumference. are arranged at predetermined intervals in the radial direction, and at least two reinforcing bar cutting bits 9 are arranged between each concentric circumference at equal intervals in the circumferential direction. It has been done.
コンクリート掘削用ビツト８は第８図及び第９
図に示すようにビツトシヤンク１０の両端頂部に
超合金チツプ１１を固着し所定の高さH2として
あり、コンクリート掘削に適合させるため前記土
砂掘削用ビツト４に比較して剛性を高め得るよう
該ビツト８のすくい角を0゜近く又は負の角度にと
り、更に超硬合金チツプ１１の量を大きくしてあ
る。しかし、この超硬合金チツプ１１は製作時の
欠けを無くすため、角は面をとる必要がある。従
つて、角が鋭くないため、コンクリートのような
脆性材の掘削には適するが、鉄筋のような延性材
の切削には必ずしも適さず、掘削効率が若干低下
する。 Bit 8 for concrete excavation is shown in Figures 8 and 9.
As shown in the figure, superalloy chips 11 are fixed to the tops of both ends of the bit shank 10 to a predetermined height H2 , and the bits are designed to have higher rigidity than the earth and sand excavation bit 4 in order to be suitable for concrete excavation. The rake angle of 8 is set close to 0° or a negative angle, and the amount of cemented carbide chips 11 is further increased. However, the corners of this cemented carbide chip 11 must be chamfered to avoid chipping during manufacturing. Therefore, since the corners are not sharp, it is suitable for excavating brittle materials such as concrete, but it is not necessarily suitable for cutting ductile materials such as reinforcing bars, resulting in a slight decrease in excavation efficiency.
鉄筋コンクリートの鉄筋のような延性材を切削
するには超硬合金チツプの切削角が鋭いほうが切
削効率が高い。そこで、第１０図乃至第１２図に
示すように、ビツトシヤンク１２の上端部近傍に
鋭い角を持つた数mm〜十数mmの超硬合金チツプ粒
１３を銀ロー又は溶接で溶着し所定の高さH2と
して鉄筋切削用ビツト９を構成してある。 When cutting ductile materials such as reinforcing bars in reinforced concrete, the sharper the cutting angle of the cemented carbide chip, the higher the cutting efficiency. Therefore, as shown in FIGS. 10 to 12, cemented carbide chips 13 having a sharp angle and a diameter of several mm to more than 10 mm are welded by silver soldering or welding to the vicinity of the upper end of the bit shank 12 to achieve a predetermined height. A reinforcing bar cutting bit 9 is configured as the steel H2 .
以上のコンクリート掘削用ビツト８及び鉄筋切
削用ビツト９の高さH2は、鉄筋コンクリートの
掘削を土砂の掘削に先行させる必要があることか
ら、土砂掘削用ビツト４の高さよりもおおよそ鉄
筋の太さＤの寸法以上高く、すなわちH2＝H1＋
Ｄ＋αの関係としておく。又、これらのビツト
８，９はコンクリートの掘削及び鉄筋の切削を主
体として考えるため、掘削土量ではなく切込み深
さを考えたビツト配置とする。ビツト切込み深さ
ｈは、
ｈ＝ｖ／ｎ・Ｎ
ｖ：シールド推進速度mm／min
ｎ：ビツト切削条数
Ｎ：カツタ回転数r.p.m
の如くであり、カツタ中心部と外周部では変らな
い。従つて、コンクリート掘削用ビツト８及び鉄
筋切削用ビツト９は土砂掘削用ビツト４と異なり
中心からどの円周上でも同一ビツト条数配置とし
てある。 The height H2 of the concrete excavation bit 8 and reinforcing bar cutting bit 9 is approximately the same as the thickness of the reinforcing bar compared to the height of the earth and sand excavation bit 4, since it is necessary to excavate reinforced concrete before excavating earth and sand. Higher than the dimension of D, that is, H 2 = H 1 +
Let the relationship be D+α. Furthermore, since these bits 8 and 9 are mainly used for excavating concrete and cutting reinforcing bars, the bits are arranged in consideration of the cutting depth rather than the amount of excavated soil. The cutting depth h of the bit is as follows: h=v/n・N v: shield propulsion speed mm/min n: number of bit cutting threads N: cutter rotational speed rpm, and does not change between the cutter center and the outer periphery. Therefore, unlike the earth and sand excavation bit 4, the concrete excavation bit 8 and reinforcing bar cutting bit 9 are arranged in the same number of bits on any circumference from the center.
更に、カツタ７の先端中心の円錐形状部１４に
も前記と同様のコンクリート掘削用ビツト８′及
び鉄筋切削用ビツト９′を配設してカツタ７の中
心に鉄筋コンクリートが位置する場合に対処し得
るようにしてある。ここで該円錐形状部１４はカ
ツタ面板１から突出しているので、前記各ビツト
８′，９′の高さはカツタ面板１に配設した各ビツ
ト８，９よりも高さを低く且つ小型のものとする
ことができる。 Furthermore, a concrete excavation bit 8' and a reinforcing bar cutting bit 9' similar to those described above are provided in the conical portion 14 at the center of the tip of the cutter 7, so that it is possible to cope with the case where reinforced concrete is located at the center of the cutter 7. It's like this. Since the conical portion 14 protrudes from the cutter face plate 1, the height of each of the bits 8' and 9' is lower and smaller than the bits 8 and 9 disposed on the cutter face plate 1. can be taken as a thing.
更に又、第５図に示すカツタ７に対して、コン
クリート掘削用ビツトとして第１３図に示すよう
な形状のコンクリート掘削用ビツト８″を配設し
てもよく、又、カツタ面板１の外周縁に第１４図
に示すようなコンクリート掘削用ビツト８を補
助的に配設してもよい。 Furthermore, a concrete excavating bit 8'' having a shape as shown in FIG. 13 may be provided as a concrete excavating bit for the cutter 7 shown in FIG. A concrete excavation bit 8 as shown in FIG. 14 may be additionally provided.
第１５図に示すように、前記カツタ７を有した
機械式シールド２２（第１６図）の油圧ポンプ１
５から推進駆動部に圧油を送る配管１６の途中
に、微小流量を制御し得る微小流量制御弁１７を
設けると共に、該弁１７の上流側と下流側とをス
トツプバルブ１８を有する配管１９により連通し
てバイパスとしてある。図中２０は主流量制御弁
である。通常の土砂掘削時は微小流量制御弁１７
を閉としストツプバルブ１８を開とした状態で、
主流量制御弁２０により速度制御を行ない20〜60
mm／minで掘進する。鉄筋コンクリート掘削時は
ストツプバルブ１８を閉、微小流量制御弁１７を
開として低速での速度制御を行ない５mm／min以
下で掘進するようにしてある。 As shown in FIG. 15, the hydraulic pump 1 has a mechanical shield 22 (FIG. 16) having the cutter 7.
A minute flow rate control valve 17 capable of controlling a minute flow rate is provided in the middle of a pipe 16 that sends pressure oil from 5 to the propulsion drive unit, and the upstream side and downstream side of the valve 17 are communicated by a pipe 19 having a stop valve 18. It is there as a bypass. In the figure, 20 is a main flow control valve. During normal earth and sand excavation, the minute flow control valve 17
is closed and the stop valve 18 is opened,
The speed is controlled by the main flow control valve 20, and the speed is 20 to 60.
Dig at mm/min. When excavating reinforced concrete, the stop valve 18 is closed and the minute flow control valve 17 is opened to control the speed at a low speed so that the excavation is carried out at a speed of 5 mm/min or less.
次に上記実施例により鉄筋コンクリートを掘削
する方法について説明する。 Next, a method for excavating reinforced concrete according to the above embodiment will be explained.
第１６図は立杭２１からの本発明の機械式シー
ルド２２の発進の場合を示す例であり、該立杭２
１のコンクリート壁厚800mm、主鉄筋D29mm
（ctc125mm）、配力筋D25mm（ctc250mm）、エレメ
ントジヨイント部の鋼材L75×75×12mm（ctc250
mm）、鋼板ｔ＝６mmとして、φ4.95m土圧バランス
型加水式シールド掘進機で掘削する例である。機
械式シールド２２を前進させ、コンクリート壁２
３に当接する地点で掘進速度を低速にコントロー
ルして約４mm／minの掘進速度とし、カツタ７を
回転しつつ掘進する。コンクリート壁２３はコン
クリート掘削用ビツト８，８′及び鉄筋切削用ビ
ツト９，９′の先端によりすり削られ、すり削ら
れたコンクリート片はカツタスリツト２から排出
される。更に掘進するとコンクリート壁２３に埋
設されている鉄筋に当接するが、鉄筋切削用ビツ
ト９，９′のビツトシヤンク１２に溶着されてい
る切削角の鋭い超硬合金チツプ粒１３により切削
される。以上の掘削及び切削は同心円周上に配置
した前記ビツト８，８′，９，９′がカツタ面板１
と共に回転する際のヤスリ作業を利用して行なう
ものであり、これらのビツト８，８′，９，９′に
適度な切込深さのもとで推進力とカツタ回転力を
与えることにより、コンクリートや鉄筋にヤスリ
的な摺削状態を生ぜしめ、障害物の除去を行なう
ものである。 FIG. 16 is an example showing the case where the mechanical shield 22 of the present invention is launched from the vertical pile 21.
1 concrete wall thickness 800mm, main reinforcing bar D29mm
(ctc125mm), distribution bar D25mm (ctc250mm), steel material of element joint L75×75×12mm (ctc250
This is an example of excavation using a φ4.95m earth pressure balanced type water-addition shield excavator with a steel plate t = 6mm. The mechanical shield 22 is advanced and the concrete wall 2
The excavation speed is controlled to a low speed at the point where it contacts the cutter 3 to about 4 mm/min, and the excavation is continued while rotating the cutter 7. The concrete wall 23 is ground by the tips of the concrete digging bits 8, 8' and the reinforcing bar cutting bits 9, 9', and the ground concrete pieces are discharged from the cutter slit 2. As the excavation progresses further, the reinforcing bars buried in the concrete wall 23 come into contact with the reinforcing bars, which are cut by the cemented carbide chips 13 with sharp cutting angles welded to the bit shank 12 of the reinforcing bar cutting bits 9, 9'. In the above drilling and cutting, the bits 8, 8', 9, 9' arranged concentrically are connected to the cutter face plate 1.
This is done by using the file operation that occurs when the cutter rotates with the cutter, and by applying driving force and cutter rotational force to these bits 8, 8', 9, and 9' at an appropriate depth of cut, This creates a sanding effect on concrete or reinforcing steel to remove obstacles.
これにより、従来人力によつていたコンクリー
ト壁２３の破壊除去作業が機械で行なえるように
なり、800mmの壁厚のコンクリート壁の除去作業
に約２週間かかつていたものが、１日で完了する
ことができるようになつた（掘削コンクリート
量：4.95m×4.95m×π／４×0.2π＝3.85m3、切断鉄
筋量：主鉄筋40本、配力筋20本、切断鋼材：16
本、切断鋼板：４個所）。更に、人力作業を不要
にしたので地山の薬液注入による安定化作業も不
要となり、薬液注入に要する莫大な費用を節減す
ることができる。 As a result, the work of demolishing and removing concrete walls 23, which previously had to be done manually, can now be done by machine, and the work of removing a concrete wall with a wall thickness of 800 mm, which took about two weeks, can now be completed in one day. (Amount of excavated concrete: 4.95m x 4.95m x π/4 x 0.2π = 3.85m 3 , Amount of cut reinforcing bars: 40 main reinforcing bars, 20 distribution bars, Cutting steel materials: 16
Book, cut steel plate: 4 locations). Furthermore, since manual work is no longer required, stabilization work by injecting chemical liquid into the ground is also unnecessary, and the enormous cost required for chemical liquid injection can be saved.
更に、シールド工事計画路線上に鉄筋コンクリ
ート杭等の障害物がある場合は、約30mm／minの
速度で土砂を掘進している機械式シールドの掘進
速度を５mm／min以下として前記と同様にコンク
リート掘削用ビツト８，８′及び鉄筋切削用ビツ
ト９，９′の摺削作用により掘削、除去する。こ
れにより、掘進を連続的に行なうことができ、人
力作業を無くすることができ、薬剤注入等の切羽
の安定化も不要となる。 Furthermore, if there are obstacles such as reinforced concrete piles on the shield construction planned route, concrete excavation will be carried out in the same manner as above, with the mechanical shield excavating earth and sand at a speed of approximately 30 mm/min, but at a speed of 5 mm/min or less. It is excavated and removed by the sliding action of the reinforcing bar cutting bits 8, 8' and the reinforcing bar cutting bits 9, 9'. This allows continuous excavation, eliminates manual work, and eliminates the need for chemical injection or other stabilization of the face.
第１７図は本発明の他の実施例であり、コンク
リート掘削用ビツト（図示せず）及び鉄筋切削用
ビツト９をカツタスポーク３に同心円周上に且つ
カツタ７の中心部と外周部とが略同じ掘削条数と
なるよう配設した例である。これらのビツト８，
９の高さは前記実施例の場合と同様、おおよそ鉄
筋の太さの寸法だけ高さを高くして所定の太さの
鉄筋を切削し得るようにしてあり、コンクリート
掘削用ビツト８と鉄筋切削用ビツト９とを適当に
配列してあることも前記実施例と同様である。図
中、第５図と同一符号は同一のものを示す。 FIG. 17 shows another embodiment of the present invention, in which a concrete excavation bit (not shown) and a reinforcing bar cutting bit 9 are placed concentrically around the cutter spoke 3, and the center and outer circumference of the cutter 7 are approximately parallel to each other. This is an example of arrangement so that the number of excavation lines is the same. These bits 8,
As in the case of the previous embodiment, the height of the bit 9 is increased by approximately the thickness of the reinforcing bar so that it can cut the reinforcing bar of a predetermined thickness. It is also the same as in the previous embodiment that the use bits 9 are appropriately arranged. In the figure, the same reference numerals as in FIG. 5 indicate the same parts.
本実施例の場合にも、立杭からの発進時の鉄筋
コンクリート壁の除去及びシールド工事計画路線
上の鉄筋コンクリート製の障害物の除去を入力作
業を要することなく行なうことができ、薬剤注入
等の安定化作業を不要とし得る。 In the case of this example as well, the removal of reinforced concrete walls when starting from a standing pile and the removal of reinforced concrete obstacles on the planned shield construction route can be performed without the need for input work, making it possible to stabilize the injection of chemicals, etc. This can eliminate the need for conversion work.
なお、本発明の機械式シールドによる鉄筋コン
クリート掘削装置は上述の実施例のみに限定され
るものではなく、機械式のシールドであれば、土
圧式、泥水式を問わず適用できること、コンクリ
ート掘削用ビツト及び鉄筋切削用ビツトの高さ、
形状、配列、設置数は機械式シールドの大きさに
合わせて適宜変更し得ること、掘進速度は一般に
低速であるが、鉄筋コンクリート等の障害物の大
きさに合わせて増速又は減速し得ること等、本発
明の要旨を逸脱しない範囲内において種々変更を
加え得ることは勿論である。 It should be noted that the reinforced concrete excavation equipment using a mechanical shield of the present invention is not limited to the above-mentioned embodiments, but can be applied to both earth pressure type and mud water type as long as it is a mechanical shield. Height of reinforcing bar cutting bit,
The shape, arrangement, and number of installations can be changed as appropriate according to the size of the mechanical shield, and the digging speed is generally slow, but it can be increased or decreased according to the size of obstacles such as reinforced concrete, etc. Of course, various changes may be made without departing from the spirit of the present invention.
以上述べたように本発明の機械式シールドによ
る鉄筋コンクリート掘削装置によれば、下記の如
き種々の優れた効果を発揮する。 As described above, the reinforced concrete excavation equipment using the mechanical shield of the present invention exhibits various excellent effects as described below.
（） カツタにコンクリート掘削用ビツトと鉄
筋切削用ビツトとを土砂掘削用ビツトより高く
張り出して配置したカツタを回転させつつ低速
で推進させるようにしたので、鉄筋コンクリー
ト等の障害物を摺削作用により掘削除去しつつ
掘進することができる。() A concrete excavation bit and a reinforcing bar cutting bit are placed on the cutter so as to protrude higher than the earth and sand excavation bit.The cutter is rotated and propelled at low speed, so that obstacles such as reinforced concrete can be excavated by sliding action. You can dig while removing it.
（） 機械的に鉄筋コンクリート等の障害物を
掘削除去できるので、従来行なつていた発進時
の立杭のコンクリート壁の除去或いは工事計画
路線上の鉄筋コンクリート杭等の人手による除
去作業が不要となる。従つて、危険な切羽での
人手作業がなくなるため作業の安全性が向上
し、且つ作業期間も大幅に短縮できる。() Obstacles such as reinforced concrete can be excavated and removed mechanically, so there is no need for the conventional removal of concrete walls of standing piles at the time of departure or manual removal of reinforced concrete piles on the planned construction route. Therefore, there is no need for manual labor at the dangerous face, which improves work safety and significantly shortens the work period.
（） 切羽に作業者が出る必要がなくなるの
で、従来必要としていた薬剤注入等による切
羽、地山の安定化のための莫大な費用が不要と
なり、大幅な施工費の低減が可能となり、更に
工期も短縮できる。() Since it is no longer necessary for workers to be present at the face, the huge cost of stabilizing the face and ground by chemical injection, etc., which was required in the past, is no longer necessary, making it possible to significantly reduce construction costs, and further shortening the construction period. can also be shortened.
第１図及び第２図は、従来の手掘式シールドに
おける鉄筋コンクリート杭の除去作業の説明図で
あり、第１図は上部の杭の除去作業の説明図、第
２図は中央部の杭の除去作業の説明図、第３図は
従来の機械式シールドにおける鉄筋コンクリート
杭の除去作業の説明図、第４図は従来の機械式シ
ールドの発進時の作業の説明図、第５図は本発明
の機械式シールドのカツタ部の説明図、第６図は
第５図の部詳細説明図、第７図は第６図の−
方向矢視図、第８図は第５図の部詳細説明
図、第９図は第８図の−方向矢視図、第１０
図は第５図の部詳細説明図、第１１図は第１０
図のXI−XI方向矢視図、第１２図は第１０図のXII
−XII方向矢視図、第１３図は第５図の部詳細
説明図、第１４図は第５図のXI部詳細説明図、
第１５図は本発明の機械式シールドの低速制御回
路の説明図、第１６図は本発明の機械式シールド
の立杭からの発進の場合を示す説明図、第１７図
は本発明の機械式シールドのカツタの他の実施例
の説明図である。
図中、１はカツタ面板、２はカツタスリツト、
３はカツタスポーク、４は土砂掘削用ビツト、
８，８′，８″，８はコンクリート掘削用ビツ
ト、９，９′は鉄筋切削用ビツト、１７は微小流
量制御弁、２１は立杭を示す。
Figures 1 and 2 are explanatory diagrams of the removal work of reinforced concrete piles in a conventional hand-dug shield. Figure 1 is an explanatory diagram of the removal work of the upper pile, and Figure 2 is an illustration of the removal work of the central pile. Fig. 3 is an explanatory diagram of the removal work of reinforced concrete piles in the conventional mechanical shield, Fig. 4 is an explanatory diagram of the work at the time of starting of the conventional mechanical shield, and Fig. 5 is an explanatory diagram of the removal work of the reinforced concrete pile in the conventional mechanical shield. An explanatory diagram of the cutter part of the mechanical shield, Fig. 6 is a detailed explanatory diagram of the part in Fig. 5, and Fig. 7 is a detailed explanatory diagram of the part in Fig. 6.
8 is a detailed explanatory view of the part in FIG. 5, FIG. 9 is a view in the - direction arrow of FIG.
The figure is a detailed explanatory diagram of the part in Figure 5, and Figure 11 is a detailed explanation of the part in Figure 10.
XI-XI direction arrow view in the figure, Figure 12 is XII in Figure 10
-XII direction arrow view, Fig. 13 is a detailed explanatory view of the part in Fig. 5, Fig. 14 is a detailed explanatory view of the XI part in Fig. 5,
Fig. 15 is an explanatory diagram of the low-speed control circuit of the mechanical shield of the present invention, Fig. 16 is an explanatory diagram showing the case of starting the mechanical shield of the present invention from a vertical pile, and Fig. 17 is an explanatory diagram of the mechanical shield of the present invention. FIG. 7 is an explanatory diagram of another embodiment of the shield cutter. In the figure, 1 is the cutter face plate, 2 is the cutter slit,
3 is a cutter spoke, 4 is a bit for earth and sand excavation,
8, 8', 8'', 8 are bits for concrete excavation, 9, 9' are bits for cutting reinforcing bars, 17 is a minute flow control valve, and 21 is a vertical pile.
Claims (1)
ビツトシヤンクに取り付けてなるコンクリート掘
削用ビツトと、超硬合金チツプ粒をビツトシヤン
クに溶着してなる鉄筋切削用ビツトとを、土砂掘
削用ビツトの高さよりも所要の高さ高く、且つカ
ツタの回転中心を中心とする複数の同心円周上に
夫々少なくとも２個宛周方向等間隔位置に配設
し、更に推進ジヤツキに低速掘進用の制御装置を
設けて低速での速度制御を可能としたことを特徴
とする機械式シールドによる鉄筋コンクリート掘
削装置。1 At the front of the rotatable cutter, attach a concrete excavation bit with cemented carbide chips attached to the bit shank and a reinforcing bar cutting bit with cemented carbide chips welded to the bit shank at a height higher than the earth and sand excavation bit. At least two of them are arranged at equal intervals in the circumferential direction on a plurality of concentric circles centered on the rotation center of the cutter, and the propulsion jack is further provided with a control device for low-speed excavation. Reinforced concrete excavation equipment with a mechanical shield that is characterized by its ability to control speed at low speeds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1146084A JPS60156900A (en) | 1984-01-25 | 1984-01-25 | Reinforced concrete drilling method and apparatus by mechanical shield |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1146084A JPS60156900A (en) | 1984-01-25 | 1984-01-25 | Reinforced concrete drilling method and apparatus by mechanical shield |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60156900A JPS60156900A (en) | 1985-08-17 |
| JPH0429839B2 true JPH0429839B2 (en) | 1992-05-20 |
Family
ID=11778702
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1146084A Granted JPS60156900A (en) | 1984-01-25 | 1984-01-25 | Reinforced concrete drilling method and apparatus by mechanical shield |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60156900A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01160087U (en) * | 1988-04-25 | 1989-11-07 | ||
| JP2695676B2 (en) * | 1990-04-23 | 1998-01-14 | 三菱重工業株式会社 | Obstacle cutting equipment of shield excavator |
| JP2014109103A (en) * | 2012-11-30 | 2014-06-12 | Nakada Kensetsu Kougyou Corp | Cutter head for reconstruction jacking method of existing embedded pipe |
| JP6104617B2 (en) * | 2013-01-29 | 2017-03-29 | Ｊｉｍテクノロジー株式会社 | Tunnel excavator and shaft excavation method using the tunnel excavator |
| JP5806253B2 (en) * | 2013-04-05 | 2015-11-10 | ヤスダエンジニアリング株式会社 | Drilling method for the propulsion method or shield method excavator |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5439308Y2 (en) * | 1974-08-23 | 1979-11-21 |
-
1984
- 1984-01-25 JP JP1146084A patent/JPS60156900A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60156900A (en) | 1985-08-17 |
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|---|---|---|---|
| EXPY | Cancellation because of completion of term |