JP3736626B2

JP3736626B2 - High fluidity landfill underwater placement equipment

Info

Publication number: JP3736626B2
Application number: JP2001371996A
Authority: JP
Inventors: 利久谷口
Original assignee: 不動建設株式会社
Priority date: 2001-11-01
Filing date: 2001-11-01
Publication date: 2006-01-18
Anticipated expiration: 2021-11-01
Also published as: JP2003138564A

Description

【０００１】
【発明が属する技術分野】
本発明は、高流動性埋立て材（以下、単に埋立て材という場合がある）を水中に打設する装置に関するものである。
【０００２】
【従来の技術】
土と水と固化材とを混合して成る流動化処理土や土と水と固化材と起泡剤とを混合して成る軽量土のような高流動性埋立て材の水中打設は、トレミー管状の打設管を用いて行うことが多いが、この場合に問題になるのは、打設管を流下して下端から排出される埋立て材の勢いで先に打設した埋立て材が分離・拡散されて、施工の品質が損なわれることである。
【０００３】
【発明が解決しようとする課題】
本発明が解決しようとする基本的な課題（本発明の目的）は、前述の問題点に鑑み、打設管の下端における埋立て材の排出エネルギーを急激に弱めて、前述のような事態が発生しないようにすることができる高流動性埋立て材水中打設装置を提供することにある。
【０００４】
【課題を解決するための手段】
前記課題を解決するために、請求項１に係る発明の高流動性埋立て材水中打設装置（以下、本発明の装置という）では、吊りワイヤで吊り下げたトレミー管状の打設管の上端に高流動性埋立て材圧送用ホースを連結するとともに、下端に大径の先端金具を取り付け、前記打設管の下端部を、先端金具の円筒形管部の上半部の内面近くで接線方向に吐出されるように延長している。
【０００５】
なお、本発明の装置では、打設管を伸縮自在の内外二重管構造にすること（請求項２に係る発明）や先端金具の下端の側方排出口に傾斜計付きのゴム板を上下方向に回動自在に装着すること（請求項３に係る発明）が、それぞれ好ましい。
【０００６】
【発明の実施の形態】
図面に基づいて本発明の装置を具体的に説明すると、トレミー管状の打設管１は、図示しない吊込みクレーンに吊りワイヤ２で吊り下げられ、その上端には高流動性埋立て材圧送用ホース３が連結され、また、下端には後述のような先端金具４が取り付けられている。
【０００７】
先端金具４は大径で、円錐形管部５と円筒形管部６を具え、打設管１の下端部７は、図示のように、先端の２箇所で直角に曲げられ、打設管１を流下した埋立て材が円筒形管部６上半部の内面近くで接線方向に吐出するようになっている。
【０００８】
打設管１の下端部７が前述のようになっていることにより、打設管１の口径が小で、打設管１を流下する埋立て材の流速が大である場合でも、打設管１の先端開口から吐出される埋立て材の勢いが急激に弱められるので、先に打設された埋立て材の分離・拡散は生じない。
【０００９】
円筒形管部６の下端開口の両側には、下端縁にそれぞれゴム板８，８が取り付けられた１対の横長の鉄板９，９が平行して固着され、これら鉄板９，９の長さ方向の両端部に形成された側方排出口には、それぞれゴム板１０，１０が上下方向（図の矢印方向）に回動自在に取り付けられ、これらゴム板１０，１０の各外表面には傾斜計１１，１１が装着されている。
【００１０】
円筒形管部６の下端排出口から排出された埋立て材はゴム板１０，１０を押し上げながら側方排出口から先端金具４外に出て堆積されるので、その高さ（打設高さ）が所定値に達した段階で打設管１を上方または側方に移動させるが、この移動のタイミングは傾斜計１１，１１で検知したゴム板１０，１０の回動度合いで判定することができる。
【００１１】
図示の打設管１は、上方の内管１２と下方の外管１３とを伸縮自在に連結した二重管構造になっており、吊りワイヤ２は内管１２の上端に連結され、また、先端金具４は外管１３の下端に取り付けられている。
【００１２】
内管１２の下端と外管１３の上端にはそれぞれシール部１４，１５が設けられ、これらの間に打設管伸長補助用兼埋立て材逆流防止用の圧力水が供給されるようになっており（図１参照）、また、内管１２と外管１３にそれぞれ装着された滑車１６，１７間に補巻きワイヤ１８が張架され、これを巻くことによって打設管１が収縮されるようになっている（図３参照）。
【００１３】
打設管１を前述のような二重管構造にすると、収縮状態で横移動を行い、移動位置で伸長状態にすればよいので、打設管１を吊るブームの長さを短くすることができ、また、高流動性埋立て材圧送用ホース３の高さを常にほほ一定に保持して打設作業を行うことができるので、高流動性埋立て材の圧送抵抗が一定となり、脈動の発生を防止できる利点がある。
【００１４】
なお、図中、１９は、エア操作で打設時に開、移動時に閉にするピンチバルブ、２０は、埋立て材排出圧力測定用の圧力計、２１は、先端金具４内の圧力が外の圧力より大きい場合に閉じ、逆の場合に開く逆止弁である。
【００１５】
本発明の装置では、打設作業の開始に先立って管路内のエア抜きを行うが、このエア抜きを簡単に行うためには、埋立て材圧送用ポンプにスクイズポンプを用い、これを逆回転させて、水を逆止弁２１から埋立て材製造装置まで逆流させるようにするのがよい。
【図面の簡単な説明】
【図１】本発明の装置の一例の全体的側面図である。
【図２】側方排出口のゴム板の取付け態様を示す底面図である。
【図３】補巻きワイヤの張架態様を示す側面図である。
【符号の説明】
１：打設管、２：吊りワイヤ、３：高流動性埋立て材圧送用ホース、４：先端金具、５：円錐形管部、６：円筒形管部、７：下端部、８：ゴム板、９：鉄板、１０：ゴム板、１１：傾斜計、１２：内管、１３：外管、１４：シール部、１５：シール部、１６：滑車、１７：滑車、１８：補巻きワイヤ、１９：ピンチバルブ、２０：圧力計、２１：逆止弁。[0001]
[Technical field to which the invention belongs]
The present invention relates to an apparatus for placing a highly fluid landfill material (hereinafter sometimes simply referred to as a landfill material) in water.
[0002]
[Prior art]
Submerged placement of highly fluid landfill materials such as fluidized soil, which is a mixture of soil, water, and solidified material, and lightweight soil, which is a mixture of soil, water, solidified material, and foaming agent, In many cases, this is done using a tremy tubular casting tube. In this case, the problem is that the landfilling material that has been cast first by the momentum of the landfill material that flows down the casting tube and is discharged from the lower end. Is separated and diffused, and the quality of construction is impaired.
[0003]
[Problems to be solved by the invention]
In view of the above-mentioned problems, the basic problem to be solved by the present invention (the object of the present invention) is to suddenly weaken the discharge energy of the landfill material at the lower end of the placing pipe, An object of the present invention is to provide a high-fluidity landfill underwater placing device that can be prevented from being generated.
[0004]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, in the high fluidity landfill underwater placing device of the invention according to claim 1 (hereinafter referred to as the device of the present invention), the upper end of a tremy tubular placement tube suspended by a suspension wire. A high-fluid landfill pressure-feed hose is connected to the pipe, and a large-diameter end fitting is attached to the lower end. The lower end of the placement pipe is tangent near the inner surface of the upper half of the cylindrical pipe of the end fitting. It is extended to be discharged in the direction.
[0005]
In the apparatus of the present invention, the placing tube has a telescopic inner / outer double tube structure (invention according to claim 2), and a rubber plate with an inclinometer is vertically installed at the side discharge port at the lower end of the tip fitting. It is preferable that each is mounted so as to be rotatable in the direction (the invention according to claim 3).
[0006]
DETAILED DESCRIPTION OF THE INVENTION
The apparatus according to the present invention will be described in detail with reference to the drawings. A tremy tubular casting tube 1 is suspended by a suspension wire 2 on a suspension crane (not shown), and the upper end thereof is used for pumping a highly fluid landfill material. A hose 3 is connected, and a tip fitting 4 as described below is attached to the lower end.
[0007]
The tip metal fitting 4 has a large diameter and is provided with a conical tube portion 5 and a cylindrical tube portion 6, and the lower end portion 7 of the placement tube 1 is bent at right angles at two locations on the tip as shown in the drawing, The landfill material flowing down 1 is discharged in the tangential direction near the inner surface of the upper half of the cylindrical tube portion 6.
[0008]
Since the lower end portion 7 of the placement tube 1 is as described above, the placement of the placement tube 1 is small even when the diameter of the placement tube 1 is small and the flow rate of the landfill material flowing down the placement tube 1 is large. Since the momentum of the landfill material discharged from the tip opening of the pipe 1 is sharply weakened, separation / diffusion of the landfill material previously placed does not occur.
[0009]
A pair of horizontally long iron plates 9 and 9 each having a rubber plate 8 and 8 attached to the lower end edge thereof are fixed in parallel on both sides of the lower end opening of the cylindrical tube portion 6, and the length of these iron plates 9 and 9 is fixed. Rubber plates 10 and 10 are respectively attached to the side discharge ports formed at both ends of the direction so as to be rotatable in the vertical direction (arrow direction in the figure). Inclinometers 11 are mounted.
[0010]
Since the landfill material discharged from the lower end discharge port of the cylindrical tube portion 6 is pushed out of the end fitting 4 from the side discharge port while pushing up the rubber plates 10, 10, the height (setting height) ) Reaches the predetermined value, the casting tube 1 is moved upward or sideward. The timing of this movement can be determined by the degree of rotation of the rubber plates 10, 10 detected by the inclinometers 11, 11. it can.
[0011]
The illustrated placing tube 1 has a double tube structure in which an upper inner tube 12 and a lower outer tube 13 are connected to each other in a telescopic manner, and the suspension wire 2 is connected to the upper end of the inner tube 12, The tip metal fitting 4 is attached to the lower end of the outer tube 13.
[0012]
Seal portions 14 and 15 are respectively provided at the lower end of the inner tube 12 and the upper end of the outer tube 13, and pressure water for assisting the extension of the installed tube and for preventing backflow of the landfill material is supplied between them. Further, an auxiliary winding wire 18 is stretched between pulleys 16 and 17 attached to the inner tube 12 and the outer tube 13, respectively, and the placement tube 1 is contracted by winding this. (See FIG. 3).
[0013]
If the placing tube 1 has a double tube structure as described above, it can be moved laterally in the contracted state and extended in the moving position, so that the length of the boom for hanging the placing tube 1 can be shortened. In addition, since the placement of the high-fluid landfill material pressure hose 3 can be carried out with the height of the hose 3 being kept almost constant at all times, the pressure-feeding resistance of the high-fluidity landfill material becomes constant, and pulsation There is an advantage that can be prevented.
[0014]
In the figure, 19 is a pinch valve that is opened when driving by air operation and closed when moved, 20 is a pressure gauge for measuring the discharge pressure of the landfill material, and 21 is a pressure gauge outside the end fitting 4. It is a check valve that closes when it is greater than the pressure and opens when it is vice versa.
[0015]
In the apparatus of the present invention, the air in the pipe line is vented prior to the start of the placing operation. In order to easily perform the air venting, a squeeze pump is used as the landfill material pump, and this is reversed. It is preferable to rotate the water so that water flows back from the check valve 21 to the landfill production apparatus.
[Brief description of the drawings]
FIG. 1 is an overall side view of an example of an apparatus of the present invention.
FIG. 2 is a bottom view showing a mounting mode of a rubber plate at a side discharge port.
FIG. 3 is a side view showing a tension mode of a supplementary winding wire.
[Explanation of symbols]
1: Casting pipe, 2: Suspension wire, 3: High fluidity landfill pressure hose, 4: Tip fitting, 5: Conical pipe part, 6: Cylindrical pipe part, 7: Lower end part, 8: Rubber Plate: 9: iron plate, 10: rubber plate, 11: inclinometer, 12: inner tube, 13: outer tube, 14: seal part, 15: seal part, 16: pulley, 17: pulley, 18: auxiliary winding wire, 19: Pinch valve, 20: Pressure gauge, 21: Check valve.

Claims

A high-fluid landfill pressure hose is connected to the upper end of a tremely tubular casting tube suspended by a suspension wire, a large-diameter tip fitting is attached to the lower end, and the lower end of the casting tube is placed High-fluid landfill underwater, which is extended so that the high-fluid landfill material flowing down the pipe is discharged tangentially near the inner surface of the upper half of the cylindrical tube of the tip fitting apparatus.

The high-fluidity landfill underwater placing device according to claim 1, wherein a rubber plate with an inclinometer is attached to the side discharge port at the lower end of the tip fitting so as to be rotatable in the vertical direction.

The high-fluidity landfill underwater placement device according to claim 1, wherein the placement tube has a telescopic inner / outer double tube structure.