JP2011001740A - Water take-in apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water take-in apparatus for safely and efficiently collecting a boring machine that has reached underwater in a water bottom jacking method.SOLUTION: A closed space formed by partitioning the interior of a separation cylinder axially separated in a front cylinder and a rear cylinder, by a front bulkhead and a rear bulkhead with a predetermined space in an axial direction, is formed between the rear inside of a cylindrical frame forming an outer shell of the boring machine, or the rear end side of the boring machine, and the front end side of a buried pipe row. The frame or the separation cylinder between the front bulkhead and rear bulkhead is circumferentially cut or separated. The water take-in apparatus is used when collecting the boring machine located in front of the cut or separated part, from the water in a state of partitioning with the front bulkhead. The water take-in apparatus includes a partition valve installed on the front end side of the buried pipe row; a take-in pipe extended from one end of the partition valve to penetrate the rear bulkhead and provided penetrating the frame or the separation cylinder; and a discharge pipe extended from the other end of the partition valve and provided penetrating the rear bulkhead.

Description

  The present invention relates to a water intake device for safely and efficiently recovering an excavator that has excavated a riverbed or seabed to reach an underwater vertical shaft or the like.

  In recent years, a submarine propulsion method has been developed in which a buried pipe is laid on the bottom of the water in order to construct an intake pipe or a power pipe on the bottom of the river or the sea. The excavator is recovered from the water in such a way that it is pushed out into a vertical shaft or intake port installed at the bottom of the water.

The recovery technique is to install a separation cylinder in which the front and rear cylinders are detachably connected in the axial direction between the rear end side of the excavator and the front end side of the buried pipe row, and at a predetermined interval in the axial direction. By forming a sealed space partitioned by the front partition wall of the front cylinder part and the rear partition wall of the rear cylinder part across, separating the separation cylinder in the axial direction between these front cylinder part and rear cylinder part, A technique for collecting the excavator has been developed (see Patent Document 1). Another recovery technique is to form a sealed space partitioned by a front partition and a rear partition at a predetermined interval in the axial direction inside the cylindrical frame that forms the outer shell of the excavator. A method for cutting an intermediate frame in a sealed space from underwater has been developed (see Patent Document 2).

  As a recovery procedure, when the excavator reaches a predetermined position in the reaching shaft, the watertight doors provided on the partition walls before and after the separation cylinder on the rear end side of the excavator are closed, and then the jack installed on the separation cylinder is extended. By doing so, the front cylinder and the rear cylinder are separated in the axial direction to separate the excavator and the buried pipe row. The rear end side of the excavator is in a state of being partitioned by a front partition wall of the front cylinder portion, and the front end side of the buried pipe row is in a state of being partitioned by the rear partition wall of the rear cylinder portion and sealed. In the case of the sealed space behind the cylindrical frame described above, the watertight doors of the front partition and the rear partition are closed in the same procedure, and the middle of the frame is cut to separate the excavator and the buried pipe line.

JP 2007-146542 A JP 2005-126991 A

In the above-described excavator recovery method, river water and seawater are submerged in the separation cylinder at the same time as the separation cylinder is cut off, and the water stoppage of the front bulkhead, the excavator, the rear bulkhead, and the buried pipe row is impaired. However, even if river water or seawater is flooded in the excavator or the buried pipe line, it cannot be dealt with, and it becomes a serious trouble that makes it impossible to perform subsequent separation work. In addition, since no water pressure is generated in the separation cylinder at the beginning of the separation, the excavator is pushed backward due to the large water pressure applied to the tip of the excavator and moves in an unstable manner. Has also been damaged.
Also, in the method of forming a sealed space inside the cylindrical frame that forms the outer shell of the excavator, a hole for allowing water to flow into the frame is formed in the frame, and the diving is performed before cutting the frame. A method of filling the sealed space with water from the water by the husband is adopted, but it can not cope when the water stoppage of the front bulkhead and the excavator and the rear bulkhead and the buried pipe row is impaired in the same manner as the above recovery method There is a problem. For this reason, this invention is providing the water intake device for collect | recovering the excavation machine which reached | attained the underground shaft etc. in water safely and efficiently.

The present invention is divided into a front cylinder and a rear cylinder in the axial direction inside the rear of the cylindrical frame forming the outer shell of the excavator or between the rear end side of the excavator and the front end side of the buried pipe row. Forming a sealed space in which the inside of the separation cylinder is partitioned by a front partition wall and a rear partition wall at a predetermined interval in the axial direction, and the frame or the separation cylinder between the front partition wall and the rear partition wall Is a water intake device for recovering from the water in a state where the excavator in front of the cutting / separating point is partitioned by a front partition,
A gate valve is installed on the front end side of the buried pipe line, and one end of the gate valve extends through the rear partition wall and extends through the frame or the separation cylinder, The other end is a water intake device constituted by a discharge piping material penetrating the rear partition wall.

  The excavator employs a closed-type propulsion method in which the face and work space are partitioned by a partition wall, and has a watertight structure and a water-resistant structure that can withstand underground water pressure. There are mud type, earth pressure type and mud type in the closed type propulsion method, but in the submarine type propulsion method, the mud type propulsion method can discharge the excavated earth and sand from the chamber together with the muddy water to the outside of the mine with the mud drainage equipment. The construction method is most suitable.

  The connection between the excavator and the buried pipe row, and the connection between the excavator and the separation cylinder is generally performed by fitting the end portions together. Therefore, both ends are provided with steps for fitting and uneven structures.

The front partition wall and the rear partition wall provided at a predetermined interval inside the rear of the frame and inside the separation cylinder ensure water tightness with the inner wall of the frame and the separation cylinder, and do not deform due to water pressure after cutting and separation. Further, it is firmly fixed by welding or the like. The front and rear bulkheads are provided with water-permeable doors that can be opened and closed so that the front and rear spaces are isolated from each other in a water-tight manner and the state in which they can freely go back and forth. It becomes possible to set as required.

The gate valve installed on the front end side of the buried pipe row is for shutting off fluids such as river water and seawater, and generally used gate valves and ball valves may be employed.

The piping material for intake and the piping material for discharge may withstand the water pressure at the buried pipe position, and a steel pipe material that is usually used may be adopted. The gate valve may be installed at a position that does not hinder the rear partition wall. The number of installations will be increased as the buried pipe diameter increases in order to perform efficient water injection.

  When the excavator arrives at a predetermined arrival position, the water intake device of the present invention closes the watertight doors of the front partition and the rear partition, and opens the gate valve installed on the front end side of the buried pipe row, River water or seawater is taken from the intake piping material and moved to the discharge piping material through the gate valve, so that the sealed space formed in the front and rear partition walls can be reliably filled with water. The uptake operation can be performed in the atmospheric pressure with good working environment on the front end side of the buried pipe line, and if there is an abnormality in the water stoppage of the front and rear partition walls, the gate valve is closed and the water intake is stopped. After draining the water poured into the sealed space formed by the partition wall, the watertight door can be opened to repair the leaking point.

  A water intake device for excavating the riverbed and seabed to recover the undercarriage reaching the underwater shaft, etc., in a sealed space provided between the front bulkhead and the rear bulkhead before the excavator is recovered In addition, we have realized water intake technology that safely captures water W, which is river water and seawater, from the buried pipe and efficiently recovers the excavator.

FIG. 1 is a front view for explaining a rear partition equipped with the water intake device of the present invention. At the tip of the excavator, a cutter head is provided in the tip opening of the outer shell. The cutter head is pivotally supported by a rotating shaft at the center, and the rotational force is transmitted to the cutter head by a drive mechanism installed at the rear.
Separation cylinder 1 that is separated into a front cylinder and a rear cylinder in the axial direction inside the rear of the cylindrical frame forming the outer shell of the excavator or between the rear end side of the excavator and the front end side of the buried pipe row A sealed space 7 is formed by partitioning the interior of the interior by a front partition wall (not shown) and a rear partition wall 2 at a predetermined interval in the axial direction. The front partition wall and the rear partition wall 2 are provided with a passable opening in the central portion, and by providing a watertight door 8 that closes the opening so as to be openable and closable, the sealed space 7 formed by the front and rear partition walls is reliably watertightly isolated. It is possible to set the selected state and the state in which the user can freely go back and forth as necessary. On the buried tube row side of the rear partition wall 2, water intake devices 3 are installed at two locations on the upper and right sides. In addition, an air-extracting gate valve 10 connected to a piping material extending from the sealed space 7 through the rear partition wall 3 to the buried pipe row side is installed at a position that does not hinder the upper water intake device 3. ing. Furthermore, a drainage gate valve 9 connected to a pipe material extending from the sealed space 7 through the rear partition wall 3 to the buried pipe row side is installed in the lower part.

  In the present embodiment, the number of installed water intake devices 3 is disclosed as two places, but efficient intake of water W is performed by increasing or decreasing the number of installed according to the diameter of the buried pipe or the volume of the sealed space 7. It is.

  The air vent gate valve 10 has a rear partition wall 2 so that the air in the sealed space can be extracted to the buried pipe row side when the sealed space formed by the front and rear partition walls is filled with water W. It is installed in connection with the piping material that penetrates the top.

The drainage gate valve 9 draws out the water W contained in the sealed space 7 to the buried pipe row side in order to repair the water stoppage of the partition wall when an abnormality occurs in the water stoppage of the front and rear partition walls. In general, a gate valve, a ball valve, and the like that are used are connected to a piping material that penetrates the lower part of the rear partition wall 2.

  FIG. 2 is a front view illustrating the water intake device of the present invention in detail. In this embodiment, a case where the separation cylinder 1 is used will be described. A water intake device 3 is installed on the buried tube row side of the rear partition wall 2 fixed so as to be inscribed in the rear tube portion of the separation tube 1. The water intake device 3 includes a gate valve 4 installed on the front end side of the buried pipe row, and one end of the gate valve 4 extending through the rear partition wall 2 and passing through the separation tube in the sealed space 7 to be fixed. The intake piping material 5 provided and the other end of the piping material 5 are fixed by penetrating the rear partition wall 2.

  FIG. 3 is a cross-sectional view illustrating the water intake device of the present invention in detail. In this embodiment, the case where the separation cylinder 1 is used will be described. The intake piping material 5 coming out of the gate valve 4 extends through the rear partition wall 2 to the sealed space 7, extends outward using a curved pipe, passes through the rear cylinder portion of the separation cylinder 1, and is fixed. It is installed. Further, the discharge piping material 6 coming out of the gate valve 4 is fixedly provided through the rear partition wall 2.

  At the time of propulsion construction, since the free passage of the sealed space 7 is necessary, the water stop door of each partition wall is opened and the gate valve is closed.

  Next, an underwater recovery method for an excavator using the water intake device 3 according to the present invention will be described. When the excavator arrives at a predetermined position in a vertical shaft or intake well constructed in advance on the riverbed or seabed, piping materials and wirings that pass through the sealed space 7 formed by the front bulkhead and the rear bulkhead 2 behind the excavator Then, the watertight doors 8 on the front and rear partitions are closed to close the sealed space 7. When the closing of the watertight door 8 is completed, the gate valve 4 installed on the front end side of the buried pipe row is opened, and the water W, which is river water or seawater, is taken in from the intake pipe material 5, and the discharge pipe material Water is poured into the sealed space 7 through 6. At this time, the air-extracting gate valve 10 installed at the top of the rear partition wall 2 is opened, and the air in the sealed space 7 is extracted to the buried pipe row side.

  When the closed space 7 is filled with water W, the air-extracting gate valve 10 is closed, and the gate valve 4 of the water intake device 3 is also closed to complete the water injection. Thereafter, in the case of the separation cylinder method, the jack installed in the separation cylinder 1 is extended, the front cylinder and the rear cylinder are separated in the axial direction, and the excavator and the buried pipe row are separated. The rear end side of the digging machine is in a state of being partitioned by a front partition wall of the front tube portion, and the front end side of the buried pipe row is in a state of being partitioned by the rear partition wall 2 of the rear tube portion and sealed. When the excavator is completely separated from the buried pipe row, the excavator is safely recovered from the water. In the method of installing the sealed space 7 behind the cylindrical frame that forms the outer shell of the excavator, the excavator and the buried pipe row are separated by cutting the frame in the circumferential direction by a diver from underwater. .

  If there is a problem with the water stoppage of the partition wall during water intake into the sealed space 7, the gate valve 4 is closed to temporarily stop the water injection operation, and the drain gate valve 9 provided at the lower part of the rear partition wall 2. Water W that has entered the sealed space is drained through the buried pipe row. Then, the watertight doors 8 of the front and rear partition walls are opened and opened to repair and repair the leaking points.

  It can be applied to the water bottom propulsion method that can recover the excavator safely and efficiently from underwater vertical shafts by propelling the riverbed and seabed.

It is a front view explaining the back partition equipped with the water intake device of this invention. It is a front view explaining the water intake device of this invention in detail. It is sectional drawing explaining the water intake apparatus of this invention in detail.

DESCRIPTION OF SYMBOLS 1 Separation cylinder 2 Rear partition wall 3 Water intake device 4 Gate valve 5 Piping material for intake 6 Piping material for discharge 7 Sealed space
8 Watertight door 9 Drainage gate valve 10 Air-release gate valve W Water

Claims (1)

A separation cylinder that is separated into a front cylinder and a rear cylinder in the axial direction between the inside of the cylindrical frame that forms the outer shell of the excavator or between the rear end side of the excavator and the front end side of the buried pipe row. A sealed space is formed in which the inside is partitioned by a front partition and a rear partition at a predetermined interval in the axial direction, and the frame or the separation cylinder between the front partition and the rear partition is arranged in the circumferential direction. A water intake device for cutting or separating and recovering the excavator ahead of the cutting / separating point from the water in a state of being partitioned by a front bulkhead,
A gate valve is installed on the front end side of the buried pipe line, and one end of the gate valve extends through the rear partition wall and extends through the frame or the separation cylinder, The other end is constituted by a discharge piping material penetrating through the rear partition wall.

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