JP2003222267A - Water-bottom laying method of water collecting pipe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve executing efficiency. <P>SOLUTION: This water collecting pipe 10 to be laid of the water-bottom laying method is divided into divided water-collecting pipe units 10a to 10j along the longitudinal axis direction of a water-collecting parent pipe 12. Each of the water-collecting pipe units 10a to 10j is provided with the water-collecting parent pipe 12 with a predetermined length and a water-collecting branch pipe 14 arranged on both sides of this water-collecting parent pipe 12. The water- collecting pipe 10 is sunk and installed on the water bottom face of laying points of the water-collecting pipe 10 by being supported by a recess-shaped truss structured hanging frame 20 with its lower part opened, after a receiving anchor is cast and installed. After that, the water-collecting parent pipe 12 and the water-collecting branch pipe 14 are bound and fixed to the receiving anchor. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water bottom laying method for a water collecting pipe used in a seawater desalination facility or the like.

[0002]

2. Description of the Related Art In a seawater desalination facility or the like, a water collecting pipe is buried in the bottom of the sea and seawater is taken in through the water collecting pipe. Such a water collecting pipe is usually provided with a water collecting master pipe and a large number of water collecting branch pipes, and a plurality of water collecting branch pipes on both side surfaces of the water collecting master pipe are orthogonal to the longitudinal axis of the water collecting master pipe. In addition, it has a shape protruding in the horizontal direction.

By the way, as a method of laying such a water collecting pipe on the bottom of the water, conventionally, a crane ship is used to suspend a pipe body (water collecting parent pipe or water collecting branch pipe) from the surface of the water so that the floor is rough (coarse average). It was installed directly on the dredged surface.

FIG. 17 shows an example of a state in which the pipe body 1 is suspended and supported when the water collection pipe is laid. In the example shown in the same figure, a tube body 1 of about several meters is housed in a U-shaped concrete unit 2, fixed by a wire 3, and hung by a hanger 4 and made of I-shaped steel. The frame 5 is suspended and supported.

In such a suspension support of the tubular body 1, in order to improve the construction efficiency, the suspension frame 5 is supported along the longitudinal axis direction of the suspension frame 5.
A plurality of concrete blocks 2 containing the tubular body 1 are provided at predetermined intervals. Then, in such a state, the suspension frame 5 is suspended by the hoist of a crane ship (not shown) via the suspension wire 6.

[0006] The pipe body 1 that has been lowered onto the dredging surface by the operation of the hoist is taken out from the concrete unit 2, and a plurality of water collecting branch pipes are connected to both side surfaces of the water collecting parent pipe in water. The installation and adjustment of the pipe body 1 and the connection work between the pipe bodies are performed by the diver underwater.

At this time, when height adjustment or the like is required, since the tube itself is lightly lifted, a pedestal such as a receiving unit having a function as a counterweight is also used.

However, such a conventional water bottom laying method for the water collecting pipe has the following problems.

[0009]

That is, in the above-mentioned conventional laying method, in order to keep the pipe body 1 horizontal when suspending the pipe body 1 so as not to apply an unreasonable force, or in water, Since the tubular body 1 is lightweight, it floats due to buoyancy, so a concrete unit 2 for the counterweight or the like is additionally provided in order to prevent lifting, but in order to ensure the uniformity of the load, The suspension frame 5 needs to have a large cross-sectional rigidity.

Further, since the pipe body 1 is basically laid as a single unit, the mutual connection work is a manual work of the diver, the construction period becomes long, and it is greatly affected by the sea condition, and the pipe 1 is actually operated. There is a problem such as a decrease in the rate.

Further, when laying on the bottom of a deep water, since the accuracy of the floor preparation becomes low, the pedestal is used for positioning and height adjustment. This work is also for diving work. However, if the pedestal is misaligned due to unbalanced pressure when the tube is backfilled, it takes a lot of effort and time to correct it.

The present invention has been made in view of such conventional problems, and an object of the present invention is to provide a method for laying a water bottom of a water collecting pipe capable of improving the construction efficiency. It is in.

[0013]

In order to achieve the above object, the present invention provides a plurality of water collecting branch pipes on both sides of a water collecting parent pipe.
A method of laying a water bottom of a water collection pipe connected so as to project in a horizontal direction, wherein the water collection pipe is divided into a plurality of water collection pipe units along a longitudinal axis direction of the water collection parent pipe, and each water collection pipe unit In addition, a predetermined number of the water collecting branch pipes are preliminarily attached to both side surfaces of the water collecting parent pipe, and a receiving anchor is driven and installed on the water bottom surface of the laying point of the water collecting pipe, and then a concave shape whose bottom is opened is formed. The water collecting pipe unit is suspended and supported by a suspension frame having a truss structure and is sunk, and then the water collecting parent pipe and the water collecting branch pipe are tightly fixed to the receiving anchor.

According to the water bottom laying method of the water collecting pipe thus constructed, since the water collecting pipe is divided into a plurality of water collecting pipe units along the longitudinal axis direction of the water collecting parent pipe, it is suspended and supported. In this case, the suspension frame does not need to have a large cross-sectional rigidity, and a lightweight truss structure can be adopted.

Further, since a predetermined number of the water collecting branch pipes are previously attached to both side surfaces of the water collecting parent pipe in each water collecting pipe unit, the connection work in water can be reduced and the construction efficiency can be improved. .

Further, when the suspension frame of truss structure is used, the buoyancy at the time of submerging due to its own weight is canceled and the control at the time of submerging can be easily performed, and furthermore, the water collecting pipe unit is suspended and supported and then submerged. In addition, since the water collecting parent pipe and the water collecting branch pipe are fixedly bound to the anchor, the positional deviation does not occur unlike the case where the pedestal is used.

In the laying method of the present invention, in the water collecting pipe unit, a plurality of the water collecting branch pipes are vertically swingably connected to both side surfaces of the water collecting parent pipe, and the suspension frame is A base suspension frame that accommodates the water collecting parent pipe inward, and a plurality of branch-shaped suspension frames that accommodates the water collecting branch pipe inward and is swingably movable in the vertical direction to the suspension frame base. When the water collecting pipe unit is suspended and supported and is submerged in water, the water collecting branch pipe is moved upward together with the branch-shaped suspension frame so as to be hung above the water collecting parent pipe. At the same time, after the water collecting bottom pipe is set on the bottom surface of the water, the water collecting branch pipe can be moved downward together with the branch-shaped suspension frame to be expanded horizontally to be connected to the water collecting parent pipe.

According to this structure, when the water collecting pipe unit is suspended and supported and is submerged in water, the water collecting branch pipe is moved upward together with the branch-shaped hanging frame so as to be hung above the water collecting parent pipe. Since the state is set, the buoyant force associated with the sinking is further reduced, and the sinking can be easily performed.

Further, in the laying method of the present invention, in the water collecting pipe unit, a plurality of the water collecting branch pipes are fixedly coupled to both side surfaces of the water collecting parent pipe, and the suspension frame is formed by the water collecting parent pipe. A base suspension frame to be housed inward, and the water collecting branch pipe to be housed inward,
It can be configured with a plurality of branch-shaped suspension frames having one end fixed to the suspension frame base.

Further, according to the laying method of the present invention, the water collecting parent pipe is fixed to the receiving anchor by binding before the water collecting branch pipe is moved downward together with the branch-shaped suspension frame to be expanded horizontally. can do.

According to this construction, the water collecting pipe unit is fixed to the receiving anchor after the water collecting pipe unit is bottomed on the water bottom, and thereafter the water collecting branch pipe is moved downward together with the branch-shaped suspension frame. As it is expanded to the horizontal state, no positional deviation occurs.

The receiving anchor includes a parent pipe receiving anchor attached to both side surfaces of the water collecting parent pipe, and a branch pipe receiving anchor attached to both side surfaces of the water collecting branch pipe. Also, the branch pipe receiving anchor can be preliminarily driven on the water bottom surface in correspondence with the expanded shape of the water collecting branch pipe so as to extend in the horizontal direction.

The water collection pipe unit is installed so that the ends of the water collection pipes are adjacent to each other, and can be connected for communication through a connecting rod extending between the pair of water collection pipes. it can.

A guide portion that fits into the parent pipe receiving anchor may be provided on the suspension frame base portion.

[0025]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. 1 to 16 show an embodiment of a water bottom laying method for a water collecting pipe according to the present invention.

The water collection pipe 10 to be laid in this embodiment is
As shown in the plan view of FIG. 1, a water collecting parent pipe 12 having a hollow circular cross section and a large number of water collecting branch pipes 14 are provided, and a plurality of water collecting branch pipes 14 are provided on both side surfaces of the water collecting parent pipe 12. It is connected so as to project in the horizontal direction.

The water collecting branch pipes 14 are extended so that the central axis thereof is orthogonal to the longitudinal axis of the water collecting parent pipe 12, and are arranged in rows at predetermined intervals in the longitudinal axis direction of the water collecting parent pipe 12. It is located in.

The water collecting pipe 10 is sunk by being supported by a concave truss structure hanging frame 20 having an opening at the lower side after the receiving anchor 18 is installed on the water bottom surface 16 of the laying point of the water collecting pipe 10. After installation, the water collecting parent pipe 12 and the water collecting branch pipe 14 are received and tightly fixed to the anchor 18.

In the case of this embodiment, as shown in FIG. 1, the water collecting pipe 10 has a total of 10 water collecting pipe units 10a divided along the longitudinal axis of the water collecting master pipe 12 at substantially the same intervals.
It is divided into 10j.

Each of the water collecting pipe units 10a to 10j is provided with a water collecting master pipe 12 having a predetermined length and a total of 12 water collecting branch pipes 14 arranged on both sides of the water collecting master pipe 12. Each of the water collecting pipe units 10a to 10j has a water collecting parent pipe 12 in advance.
Twelve water collecting branch pipes 14 are connected to both side surfaces of the above so as to be swingable in the vertical direction.

FIG. 9 shows details of the connecting structure of the water collecting parent pipe 12 and the water collecting branch pipe 14 in each of the water collecting pipe units 10a to 10j.
Is shown in. In the connection structure shown in the figure, the plurality of water collecting branch pipes 14 are connected to the side surfaces of one water collecting parent pipe 12 so as to be vertically swingable.

In FIG. 9, the water collecting branch pipe 14 is connected only to the right side surface of the water collecting parent pipe 12, but the water collecting branch tube 14 is also connected to the left side surface with the same structure.

In the case of this embodiment, the water collecting branch pipe 14 is a flexible hollow independent ring pipe in which independent rings are continuously arranged at a predetermined interval, and the fixing portion 14a.
And the movable part 14b.

The fixing portion 14a has a relatively short length and is open at both ends. One end side is inserted into a through hole 22 formed through the side surface of the water collecting parent pipe 12 to collect water. The adhesive 2 is folded back along the inner wall of the parent pipe 12
It is fixed at 4. The adhesive 24 is also interposed between the edge of the through hole 22 and the outer surface of the fixing portion 14a.

The other end of the fixed portion 14a and the end of the movable portion 14b are arranged adjacent to each other, and a flexible sleeve 25 made of rubber or the like is covered and attached so as to straddle between these ends. There is.

According to the connecting structure thus constructed, the movable portion 14b of the water collecting branch pipe 14 elastically deforms the flexible sleeve 25, so that it swings in the vertical direction as shown by the phantom line in FIG. It is movably connected.

As shown in detail in FIG. 10, the suspension frame 20 has a base opening suspension frame 2 for accommodating therein the water collecting parent pipes 12 of the water collecting pipe units 10a to 10j with the concave opening facing downward.
0a and a branch-shaped suspension frame 20b that accommodates each of the water collecting branch pipes 14 of the water collecting pipe units 10a to 10j with the concave opening facing downward.

The plurality of branch-shaped suspension frames 20b are the suspension frame base 20a.
The upper and lower portions are connected to each other via a pin mechanism 26 so as to be swingable in the vertical direction. The center of the swing movement of the pin mechanism 26 is set at a position that does not prevent the movable portion 14b of the water collecting branch pipe 14 from swinging vertically.

The water collecting parent pipe 12 and the water collecting branch pipe 14 housed in the base suspension frame 20a and the branch suspension frame 20b are attached with wires 28 as shown in FIG. Also, it is detachably locked to the branch-shaped suspension frame 20b.

A pair of guide portions 29 are arranged opposite to each other at the lower end of the base suspension frame 20a. This guide part 29
Is tilted downward in an inverted C-shape, and is fitted between the parent pipe receiving anchors 18a described later sequentially from the tip side thereof when the water collecting pipe units 10a to 10j are sunk,
It has a positioning function.

When laying the water collection pipe units 10a to 10j on the bottom of the water, first, as shown in FIG. 2, the water collection pipe units 10a to 10j are attached to the suspension frame 20 on the work table boat 30 in the offshore work yard. The work of locking with the wire 28 is performed.

Next, as shown in FIG. 3, the work pontoon 30 is towed to the laying point, and then, as shown in FIG. 4, the work pontoon 30 is transferred to the hoist ship 32.

Before such work on the ship, dredging of the seabed and leveling of crushed stones are performed on the bottom surface 16 of the water collecting pipe 10 where the water pipe 10 is to be laid. As shown in FIG. 13, a sandproof sheet 36 is laid on the top.

In the case of the present embodiment, the receiving anchors 18 are parent pipe receiving anchors 18a which are attached to both side faces of the water collecting parent pipe 12 at a predetermined interval, and both side faces of the water collecting branch pipe 14. And a branch pipe receiving anchor 18b attached at a predetermined interval.

The receiving anchor 18a for the master pipe is the water collecting master pipe 1
The pair of receiving anchors 18b for branch pipes are placed so as to face each other at a distance substantially equal to the diameter of 2.
The pair of water collecting branch pipes 14 are arranged so as to face each other at an interval substantially the same as the diameter of the water collecting branch pipe 14.

In this case, the receiving anchors 18a, 18b for the main pipe and the branch pipes are preliminarily associated with the expanded shape so that the water collecting branch pipe 14 is extended in the horizontal direction.
It is cast on the water bottom surface 16.

When the water collecting pipe units 10a to 10j are suspended and supported by the hoist 34 of the hoist ship 32 and are submerged in water, as shown in FIG. 4, the water collecting branch pipe 14 is moved upward together with the branch-shaped suspension frame 20b. It is moved and supported above the water collecting parent pipe 12 in a suspended state.

FIG. 11 shows the details of the process of supporting in this suspended state, in which the water collecting branch pipe 14 is branched like a hanging frame 20b.
At the same time, the suspension wire 37 is moved upward and supported above the water collecting parent pipe 12 in a suspended state by locking the suspension wire 37 to the outer end of the branch-shaped suspension frame 20b, and the other end side of the suspension wire 37. By pulling up, the branch-shaped suspension frame 20b is moved upward by approximately 90 degrees to a standing state, and the upper end side of the branch-shaped suspension frame 20b is locked to the receiving portion 38 of the hoist 34, and this state is maintained.

In this case, as shown in FIG. 12, a hanging fitting 39 is attached to the base hanging frame 20a of the hanging frame 20, and a hanging wire 40 connected to the hanging fitting 39 is connected to the hoist 34. Suspend and support.

Next, as shown in FIG. 5, by operating the hoist 34, the water collecting pipe units 10a to 10j are submerged in the water together with the suspension frame 20, and the water collecting pipe units 10a to 10j are set on the water bottom surface 16. At this time, the parent pipe receiving anchor 18a serves as a reference for the sunk position, and by fitting the guide portion 29 to this, the water collection pipe units 10a to 10j can be accurately bottomed at a predetermined position.

The water collecting pipe units 10a to 10j are the water bottom 1
6, the water collecting branch pipe 14 is moved downward together with the branch-shaped suspension frame 20b, as shown in FIG.
The water is expanded in a horizontal state and connected to the water collecting parent pipe 12 for communication, and thereafter, the water collecting parent pipe 12 and the water collecting branch pipe 14 are received and fixed to the anchor 18 by binding.

Prior to this binding and fixing, the suspension frame 20 is released from the water collecting pipe units 10a to 10j by releasing the locked state with the water collecting pipe units 10a to 10j, and as shown in FIG. The end portion of the frame-shaped suspension frame 20b is pulled up toward the upper side to bring it into a vertically suspended state.

When the water collecting branch pipe 14 becomes horizontal between the water collecting branch pipe 14 and the water collecting parent pipe 12, the fixed portion 14a and the movable portion 14b communicate with each other by the flexible sleeve 25, Although they are communicated with each other, a band or the like may be wound around the flexible sleeve 25 in order to strengthen this communication state.

The water collecting parent pipe 12 is tightly bound and fixed to the parent pipe receiving anchors 18a attached to both side surfaces thereof. A string-like object such as a wire may be used for the tight binding and fixing. As shown in FIG. 14, a one-touch hook system or a belt buckle system can be preferably used via a bracket 18c that is fixed to the receiving anchor 18a in advance.

On the other hand, the water collecting branch pipe 14 is tightly fixed to the branch pipe receiving anchors 18b provided on both sides of the water collecting branch pipe 14 with wires 42 as shown in FIG. In addition, in the water bottom laying method of the embodiment, the water collection pipe units 10a to 10j.
The step after the bottom is deposited on the water bottom surface 16 does not need to be limited to the procedure described above, and the procedure described below can also be adopted.

That is, the water collecting branch pipe 14 is connected to the branch-shaped suspension frame 20b.
Before moving downward together with the horizontal expansion, the water collecting parent pipe 12 is tightly bound and fixed to the parent pipe receiving anchor 18a, and then horizontally expanded, the suspension frame 20 is removed, and the water collecting branch pipe 14 is expanded. It can be a binding procedure to the receiving anchor 18b.

According to such a procedure, after the water collecting pipe units 10a to 10j have bottomed on the water bottom surface 16, only the water collecting parent pipe 12 is first bound and fixed to the receiving anchor 18a, and thereafter, the water collecting pipe units 10a to 10j are collected. Since the water branch pipe 14 is moved downward together with the branch-shaped suspension frame 20b to be expanded horizontally, the expanding operation is stable and accurate, and the positional deviation does not occur.

Further, in this embodiment, since the suspension frame 20 has a truss structure, the hand is inserted through the truss gap,
Since the water collecting parent pipe 12 can be tightly bound and fixed to the parent pipe receiving anchor 18a, such a procedure can be adopted.

The above-described steps are sequentially repeated, and the water collecting pipe unit 10 is formed on the water bottom surface 16, for example, as shown in FIG.
As shown in FIG. 10, the adjacent installations are made in the order of 10a to 10j.

At this time, each water collecting pipe unit 10a-10
j is installed so that the ends of the water collecting parent pipes 12 are adjacent to each other, and is connected for communication through the connecting rod 42 that extends over the pair of water collecting parent pipes 12.

FIG. 15 shows the details of the connecting rod 42 used in the present embodiment. The connecting rod 42 shown in the same drawing is a semicircular upper and lower curved body obtained by dividing a cylinder whose both ends are open on the central axis. It is provided with plates 42a and 42b and a cylindrical inspection tube 42c.

The inner diameters of the upper and lower curved plates 42a and 42b are substantially the same as the outer diameter of the water collecting parent pipe 12. Inspection tube 42c
Is fixed to the outer surface of the upper curved plate 42a so as to communicate with the inside, and is installed so as to be oriented in the vertical direction when attached to the water collecting parent pipe 12.

When connecting a pair of the water collecting parent pipes 12 to each other for communication, the lower curved plate 42b is installed on the water bottom surface 16 with the arc surface facing upward, and the water collecting parent pipe 12 is provided on the inner surface side thereof. It is placed so that the end faces of a.

When the upper curved plate 42a is covered from the upper surface side of the water collecting parent pipe 12 and the flanges of the curved plates 42a and 42b are tightly connected with each other by bolts and nuts, the communication connection of the water collecting parent pipe 12 is completed. .

A cutout is provided at the end of the water collecting parent pipe 12 which is connected using the connecting rod 42 so that the inspection tube 42c communicates with the inside thereof.

In the case of this embodiment, six connecting rods 42 are used, and the connecting unit 44 shown in FIG. 16 is used for the other connecting portions of the water collecting parent pipes 12. The connecting unit 44 shown in the figure has a semi-circular upper and lower curved plates 44a, 44b obtained by dividing a cylinder whose both ends are open on the central axis.
The procedure for connecting the water collecting parent pipes 12 including the above is substantially the same as the procedure for the connecting rod 42 described above.

When the communication connection between the water collecting parent pipes 12 of each of the water collecting pipe unit units 10a to 10j is completed as described above, next, as shown in FIG. The crushed stones and the replacement sand 45 are put in, and the laying and leveling are performed to complete the laying of the water collection pipe 10. The member indicated by reference numeral 46 in FIG. 1 is an intake pipe for introducing the seawater collected by the water collection pipe 10 into a desalination facility or the like.

According to the water bottom laying method of the water collecting pipe configured as described above, the water collecting pipe 10 is divided into a plurality of water collecting pipe units 10a to 10j along the longitudinal axis direction of the water collecting parent pipe 12. Therefore, when suspending and supporting this, the suspension frame 20
Can adopt a lightweight truss structure without requiring a large sectional rigidity.

Since each of the water collecting pipe units 10a to 10j is provided with a predetermined number of the water collecting branch pipes 14 on both side surfaces of the water collecting parent pipe 12, the connection work in water is reduced and the construction efficiency is reduced. Can be improved.

Further, when the suspension frame 20 having the truss structure is used, the buoyancy at the time of sinking is greatly reduced, the control at the time of sinking can be performed easily, and the water collecting pipe units 10a to 10a are provided.
j is suspended and supported to be sunk, and then the water collecting parent pipe 12
Since the water collecting branch pipe 14 is tightly bound and fixed to the anchor, the positional deviation does not occur unlike the case where the pedestal unit is used.

Further, in this embodiment, the water collecting pipe unit 10
a to 10j have a plurality of water collecting branch pipes 14 connected to both side surfaces of the water collecting parent pipe 12 so as to be capable of swinging in the vertical direction.
Is a base suspension frame 20a for accommodating the water collecting parent pipe 12 inward,
The water collecting branch pipe 14 is housed inward, and a plurality of branch-shaped hanging frames 20b that are vertically swingably coupled to the hanging frame base portion 20a are provided to suspend and support the water collecting pipe units 10a to 10j. When submerging in the water, the water collecting branch pipe 14 is attached to the branch-shaped suspension frame 2
0b together with the water collecting parent pipe 12 so as to hang vertically, and after bottoming on the water bottom surface 16, the water collecting branch pipe 14 is moved downward together with the branch-shaped suspension frame 20b to be horizontal. It is expanded to the state and connected to the water collecting parent pipe 12 for communication.

Therefore, the water collecting pipe units 10a to 10j
When suspending and supporting and submerging it in water, the water collecting branch pipe 1
4 is moved upward together with the branch-shaped suspension frame 20b so as to be suspended above the water collecting parent pipe 12, so that the buoyancy associated with the sinking is further reduced, and the sinking can be performed easily.

In the above embodiment, a plurality of water collecting branch pipes 14 are vertically swingably connected to both side surfaces of the water collecting parent pipe 12, and the suspension frame 20 has the water collecting parent pipe 12 inside. A base suspension frame 20a that is housed in one direction, and a plurality of branch-shaped suspension frames 20b that house the water collecting branch pipe 14 inward and are swingably movable in the vertical direction to the suspension frame base 20a. Although illustrated, the practice of the present invention is not limited to this, and the water collecting parent pipe 1
A plurality of water collecting branch pipes 14 are fixed to both side surfaces of 2, and the hanging frame 20
Is a base suspension frame 20a for accommodating the water collecting parent pipe 12 inward,
The water collecting branch pipe 14 may be housed inward, and may be configured with a plurality of branch-shaped suspension frames 20b having one end fixed to the suspension frame base 20a.

[0074]

As described above in detail, according to the method of laying the bottom of the water collecting pipe according to the present invention, the construction efficiency can be improved.

[Brief description of drawings]

FIG. 1 is a top view of a laid state of a water collection pipe to which a water bottom laying method according to the present invention is applied.

FIG. 2 is an explanatory view showing a first step of a water bottom laying method for a water collection pipe according to the present invention.

FIG. 3 is an explanatory diagram of a process performed subsequent to FIG.

FIG. 4 is an explanatory diagram of a process performed subsequent to FIG.

FIG. 5 is an explanatory diagram of a process performed subsequent to FIG.

FIG. 6 is an explanatory diagram of a process performed subsequent to FIG.

FIG. 7 is an explanatory diagram of a process performed subsequent to FIG.

FIG. 8 is an explanatory diagram of a process performed subsequent to FIG.

FIG. 9 is a cross-sectional view showing a connection state between the water collecting parent pipe and the water collecting branch pipe of the water collecting pipe unit used in the water bottom laying method of the water collecting pipe according to the present invention.

FIG. 10 is a detailed view of a water collection pipe unit used in the water bottom laying method of the water collection pipe according to the present invention.

FIG. 11 is an enlarged view of a main part of FIG.

FIG. 12 is an enlarged explanatory diagram of a main part of FIG. 11.

FIG. 13 is an explanatory view showing a state in which the water collecting pipe unit used in the water bottom laying method of the water collecting pipe according to the present invention is installed on the water bottom surface.

FIG. 14 is an explanatory view when the water collecting parent pipe of the water collecting pipe unit used in the water bottom laying method of the water collecting pipe according to the present invention is installed on the water bottom surface and tightly bound.

FIG. 15 is an explanatory diagram when the water collecting parent pipes of the water collecting pipe unit used in the method of laying the water bottom of the water collecting pipe according to the present invention are communicatively connected to each other.

FIG. 16 is an explanatory view when the water collecting parent pipes of the water collecting pipe unit used in the water bottom laying method of the water collecting pipe according to the present invention are connected and communicated with each other.

FIG. 17 is an explanatory view of a conventional water bottom laying method for a water collecting pipe.

[Explanation of symbols]

10 Water collection pipe 10a to 10j Water collection pipe unit 12 Water collection master 14 Water collecting branch pipe 16 Water bottom 18 Receiving anchor 18a Parent pipe receiving anchor 18b Branch pipe receiving anchor 20 hanging frame 20a Base hanging frame 20b Branch-shaped suspension frame

Claims (7)

[Claims] 1. A plurality of water collecting branch pipes are provided on both sides of the water collecting parent pipe.
A method of laying a water bottom of a water collection pipe connected so as to project in the horizontal direction, wherein the water collection pipe is divided into a plurality of water collection pipe units along a longitudinal axis direction of the water collection parent pipe, and each water collection pipe unit In addition, a predetermined number of the water collecting branch pipes are attached to both side surfaces of the water collecting parent pipe in advance, and a receiving anchor is driven into the water bottom surface of the laying portion of the water collecting pipe. The bottom of the water collecting pipe is characterized in that the water collecting pipe unit is suspended and supported on a suspension frame of the truss structure and is sunk, and then the water collecting parent pipe and the water collecting branch pipe are tightly bound and fixed to the receiving anchor. Method. 2. The water collecting pipe unit, wherein a plurality of the water collecting branch pipes are swingably movable in a vertical direction on both side surfaces of the water collecting parent pipe, and the suspension frame connects the water collecting parent pipe. A base suspension frame that is housed inward, and a plurality of branch-shaped suspension frames that are housed inwardly for the water collection branch pipe and that are vertically swingably coupled to the suspension frame base, the water collection pipe When the unit is suspended and supported and is submerged in water, the water collecting branch pipe is moved upward together with the branch hanging frame so as to be hung above the water collecting parent pipe, and the water bottom surface is provided. 2. The bottom of the water collecting branch pipe is moved downward together with the branch-shaped suspension frame to be spread horizontally to be connected to the water collecting parent pipe. How to lay the bottom of the water collection pipe. 3. The water collecting pipe unit has a plurality of water collecting branch pipes fixedly coupled to both side surfaces of the water collecting parent pipe, and the suspension frame has a base suspension for accommodating the water collecting parent pipe inward. The method of laying a water bottom of a water collecting pipe according to claim 1, further comprising: a frame and a plurality of branch-shaped hanging frames that accommodate the water collecting branch pipe inward and have one end fixed to the hanging frame base. 4. The water collecting parent pipe is tightly fixed to the receiving anchor before the water collecting branch pipe is moved downward together with the branch-shaped suspension frame to be expanded horizontally. Item 2. A method for laying a water bottom of a water collection pipe according to item 2. 5. The receiving anchor includes a parent pipe receiving anchor attached to both side surfaces of the water collecting parent pipe, and a branch pipe receiving anchor attached to both side surfaces of the water collecting branch pipe, The receiving anchor for the main pipe and the receiving anchor for the branch pipe are preliminarily driven on the bottom surface of the water in correspondence with the expanded shape of the water collecting branch pipe so as to extend in the horizontal direction. Item 5. A water bottom laying method for a water collecting pipe according to any one of items 1 to 4. 6. The water collecting pipe unit is installed so that the ends of the water collecting master pipe are adjacent to each other, and is connected for communication through a connecting rod extending between the pair of water collecting master pipes. The method for laying a water bottom of a water collection pipe according to any one of claims 1 to 5, characterized in that: 7. The method of laying a water bottom of a water collection pipe according to claim 1, wherein the suspension frame base has a guide portion that fits into the parent pipe receiving anchor.