JP7202346B2 - Caisson installation aid and installation method - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a caisson installation assisting device and installation method for assisting caisson installation work.

Conventionally, in the construction of underwater structures such as quay walls and breakwaters, a construction method in which a new caisson (hereinafter referred to as a new caisson) is joined to an existing caisson (hereinafter referred to as an existing caisson) and installed to form a continuous embankment. It has been known.

To install the new caisson, first, an anchor is installed on the bottom of the water at a certain distance from the installation position of the new caisson, and a wire drawn out from a winch installed on the new caisson is connected to the anchor.

Next, the wire is paid out and wound up by a winch, and the buoyancy of the caisson is used to guide the new caisson to a predetermined position, that is, the joining position with the existing caisson.

Then, after the new caisson is moved to a predetermined position, water is poured into the new caisson while the position is held by a wire, and the new caisson is installed by landing on the bottom of the water.

JP 2016-113744 A

However, in the conventional technology as described above, when water is poured into the new caisson and the new caisson is brought to the bottom of the water, the wire that holds the position of the new caisson is loosened in a catenary curve. There was a risk that the position of the caisson would be misaligned.

Therefore, in the installation work of such a new caisson, it is necessary to lower the new caisson while finely adjusting the position. The problem was that it took time.

Therefore, in view of such conventional problems, the present invention has been made for the purpose of providing a caisson installation auxiliary device and installation method that can maintain the position of the caisson and perform the installation work efficiently.

The feature of the invention as set forth in claim 1 for solving the conventional problems as described above is a caisson installation aid for guiding the caissons to be joined to each other to a predetermined position. and a guide unit supported by the side of the supporting beam and arranged on the side of the one caisson, wherein the guide unit has a tip end side of the caisson. A guide arm extending from the joint end face of one caisson toward the other caisson is provided, and the guide arm extends along the side surface of the other caisson.

The feature of the invention according to claim 2 is that, in addition to the configuration of claim 1, the guide unit has a plurality of guide arms in the vertical direction, and at least one of the guide arms is arranged underwater. There is something I did.

The feature of the invention according to claim 3 is that, in addition to the configuration of claim 1 or 2, the guiding arm has a guiding inclined part extending obliquely outward at the tip part.

The feature of the invention according to claim 4 is that, in addition to the configuration according to any one of claims 1 to 3, a guide roller is disposed inside the guide arm portion in contact with the side surface of the other caisson. It is in.

The feature of the invention according to claim 5 is that, in addition to the configuration of any one of claims 1 to 4, arm height adjusting means for adjusting the height of the guide arm is provided.

The feature of the invention according to claim 6 is that, in addition to the configuration according to any one of claims 1 to 5, a unit rotating means for rotating the guide unit rotatably supported by the supporting beam is provided. In addition, the angle of the guide unit can be adjusted.

The feature of the invention according to claim 7 is that, in addition to the configuration according to any one of claims 1 to 6, the guide unit is arranged on both side surfaces of the one caisson and comprises a pair of opposing guide arms. The reason is that the other caisson is sandwiched.

According to the eighth aspect of the invention, there is provided a caisson installation method in which an existing caisson and a new caisson are joined at a predetermined position, and then the new caisson is installed on the ground. A guide unit having a guide arm on one of the side surfaces is installed, and the guide arm is moved from the joint end surface of either the new caisson or the existing caisson to either the new caisson or the existing caisson. To guide the new caisson to a position where the new caisson is joined to the existing caisson by protruding to the side and guiding the guide arm along the other side surface of the new caisson or the existing caisson.

The feature of the invention according to claim 9 is characterized in that, in addition to the structure of claim 8, the guide unit is arranged on both side surfaces of either the new caisson or the existing caisson, and a pair of guide arms are used to guide the new caisson. To sandwich and guide either the caisson or the existing caisson.

The feature of the invention according to claim 10 is that, in addition to the configuration of claim 9, an auxiliary installation device in which both the guide units are supported on both ends of the support beam is used, and the auxiliary installation device is attached to the new caisson. Alternatively, the support beam member is placed on the upper surface of either the new caisson or the existing caisson, and the guide unit is placed on the new caisson or the existing caisson. is arranged on one of the side surfaces of the

The auxiliary caisson installation device according to the present invention, having the configuration described in claim 1, can reliably hold the relative positions of both caissons to be joined, and can efficiently perform the installation work of a new caisson. .

Further, in the present invention, by providing the configuration described in claim 2, it is possible to prevent the positional deviation of the caisson due to the influence of waves and the like, and to stably guide the newly installed caisson by a plurality of guiding arms. .

Furthermore, in the present invention, by providing the configuration described in claim 3, when a positional deviation occurs in the horizontal direction between the two caissons to be joined, the positional deviation is guided by the guiding inclined portion, thereby correcting the deviation. It can be modified and guided to a predetermined joint location.

Furthermore, in the present invention, by providing the configuration described in claim 4, the caisson can be smoothly received inside the guide arm without damaging the side surface of the caisson.

Further, in the present invention, by providing the configuration of claim 5, the height of the guide arm can be set at an appropriate position.

Furthermore, in the present invention, by providing the configuration described in claim 6, the rotating arm (guide roller) can be reliably brought into contact with the side surface of the other caisson and guided stably.

Furthermore, in the present invention, by providing the configuration described in claim 7, by sandwiching the other caisson between the pair of opposing guide arm portions, the movement of the other caisson in the caisson width direction is reliably restricted. This allows the installation work to be carried out in a stable state.

The method for installing a caisson according to the present invention can reliably maintain the relative positions of both caissons to be joined by providing the configuration described in claim 8, and can efficiently install a new caisson.

Further, in the present invention, by providing the configuration described in claim 9, by sandwiching the other caisson between the pair of opposing guide arm portions, the movement of the other caisson in the width direction of the caisson is reliably restricted. , the installation work can be carried out in a stable state.

In addition, in the present invention, by providing the configuration described in claim 10, the guide units can be collectively installed on both sides of the caisson, and can be collectively removed after use.

1 is a front view showing an example of a caisson installation auxiliary device according to the present invention; FIG. It is a top view same as the above. It is a side view same as the above. FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1; FIG. 2 is an enlarged front view showing a guide unit mounting portion in FIG. 1; FIG. 3 is an enlarged plan view showing a guide arm in FIG. 2; FIG. 5 is an enlarged cross-sectional view showing a roller mounting portion in FIG. 4; FIG. 11 is an enlarged plan view showing an operation mode of the guide unit by the unit rotating means; FIG. 4 is a front view showing a state of installation work of an auxiliary installation device in the caisson installation method according to the present invention; FIG. 4 is a side view showing a state of installation work of an auxiliary installation device in the caisson installation method according to the present invention; Fig. 10 is a plan view showing a state during caisson installation work; It is a side view same as the above. FIG. 4 is a plan view showing another example of the caisson installation auxiliary device according to the present invention;

Next, embodiments of the caisson installation assist device according to the present invention will be described based on the embodiments shown in FIGS. 1 to 8. FIG. In the figure, reference numeral 1 is an existing caisson, reference numeral 2 is a new caisson, and reference numeral 3 is an installation auxiliary device for assisting the installation work of the caisson.

In this embodiment, the direction orthogonal to the joint end surface of the upper surface of the caisson is called the normal direction, and the horizontal direction orthogonal to the normal direction is called the caisson width direction.

This caisson installation auxiliary device 3 includes supporting beams 4 placed on the upper surface of one caisson (in this embodiment, the existing caisson 1), and supported by the supporting beams 4. The guide units 5, 5 are arranged to guide the other caisson (the new caisson 2 in this embodiment) to a predetermined position.

The supporting beam member 4 is formed in a beam shape longer than the width of the caisson by connecting a plurality of beam members 4a, 4a, . . . made of H-shaped steel in the longitudinal direction.

The supporting beams 4 are made by appropriately combining and connecting a plurality of beam members 4a, 4a, . It's becoming Incidentally, the supporting beam 4 may be integrally formed of a piece of H-shaped steel or the like.

Guide units 5, 5 are supported on both sides of the supporting beam 4 so as to be vertically movable and rotatable via arm height adjusting means 6, and the supporting beam 4 is already installed. By being placed on the upper surface of the caisson 1, both the guide units 5, 5 are arranged on the side portions of the existing caisson 1. As shown in FIG.

Reference numeral 7 in the figure denotes support pieces which are installed on the upper surface of the existing caisson 1 at intervals in the width direction of the caisson. placed.

The supporting beams 4 may be placed directly on the upper surface of the caisson 1 without using the supporting pieces 7, but the supporting beams 4 are attached to the anchor wires pulled out from the hanging pieces installed at the four corners of the caisson. It is desirable to use support pieces 7, 7, . . .

The support piece 7 is made of a metal material in the form of a block, and can be welded to the partition lid on the upper surface of the caisson. Incidentally, the support pieces 7 are not limited to being made of metal, and may be made of other materials.

The guide units 5, 5 are provided with an arm support member 8 supported by the support beam 4 via the arm height adjusting means 6 so as to be vertically movable and horizontally rotatable. By placing the support beam member 4 at a predetermined position of the existing caisson 1, the leading end sides of the guiding arms 9 and 9 are connected to the joint end surface of the existing caisson 1. It extends from 1a toward the other caisson 2 side.

The arm height adjusting means 6 is composed of, for example, an extendable jack device such as a giraffe jack, and adjusts the height of the guide arms 9, 9 supported by the arm support member 8 by extending and retracting the jack device. It is possible.

Further, in this embodiment, the guide unit 5 can rotate horizontally with the central axis of a jack device such as a giraffe jack constituting the arm height adjusting means 6 as a rotation axis. A structure for supporting the guide unit 5 on the supporting beam 4 so as to be rotatable in the horizontal direction may be installed separately from the arm height adjusting means 6 .

The arm support member 8 is made of a bar-shaped member such as H-shaped steel, and its upper end is fixed to the arm height adjusting means 6 with its longitudinal direction directed vertically. 9 are vertically spaced and supported.

The guiding arms 9, 9 are made of bar-shaped members such as H-shaped steel, and are horizontally or tilted at a predetermined angle and fixed at predetermined positions on the outer surface of the arm support member 8 by bolts or the like. When installed at a predetermined position of the caisson 1, the tip side extends toward the other caisson 2 side.

In addition, the fixed position is set so that at least one of the plurality of vertically arranged guide arms 9, 9 is arranged in the water.

A plurality of guide rollers 13, 13 are arranged at intervals in the longitudinal direction inside the leading end portions of the respective guide arms 9, 9 so that when the two caissons 1, 2 are joined together, the side surface of the other caisson 2 is supported. It is designed to touch.

On the other hand, a unit rotating means 14 for rotating the guide unit 5 is provided inside the rear ends of the guiding arms 9 , 9 .

This unit rotating means 14 is interposed between one or more width adjusting pieces 14a made of H-shaped steel fixed to the inner surfaces of the guide arms 9, 9 and the width adjusting piece 14a and the side surface of the caisson. It is equipped with jack devices 14b such as air jacks, and by operating each jack device 14b arranged on both sides of the caisson, the entire device can be positioned at a position substantially symmetrical with respect to the center of the caisson 1. .

As shown in FIG. 8, the guide unit 5 is horizontally rotatably supported by the supporting beam 4 via the arm height adjusting means 6, so that the guide unit 5 can be guided by the operation of the jack device 14. The unit 5 rotates, and the horizontal angle of the guide unit 5 (the guide arms 9, 9) can be adjusted.

As shown in FIGS. 6 and 7, the guide rollers 13, 13 are provided with a pair of bearing plates 13a, 13a facing each other with a space therebetween, and a pair of bearing plates 13a, 13a, both ends of which are supported for vertical rotation. It has a shaft 13b and rotatable rollers 13c, 13c supported by the rotary shafts 13b, 13b, and is fixed to the inner surfaces of the guide arms 9, 9 via a fixing base 13d.

Next, a caisson installation method using the above-described caisson installation auxiliary device 3 will be described based on the embodiments of FIGS. 9 to 12. FIG. It should be noted that the same reference numerals are given to the same configurations as those of the above-described embodiment, and the description thereof will be omitted.

To install the new caisson 2 by the method of the present invention, first, a plurality of support pieces are placed on the upper surface of the joint end of the existing caisson 1 at intervals in the width direction of the caisson in accordance with the positions of the support beams 4 of the installation auxiliary device 3 . 7, 7... are installed.

Next, as shown in FIGS. 9 and 10, the auxiliary installation device 3 lifted by a crane is moved above the joint end of the existing caisson 1, aligned, and hung down. A support beam 4 is placed on the upper surface of the existing caisson 1 via 7 .

By placing the support beams 4 at predetermined positions on the existing caisson 1 in this manner, both guide units 5, 5 are arranged on both side surfaces of the existing caisson 1, and the guide arms 9, 9 is in a state of projecting from the joint end face of the existing caisson 1 toward the new caisson 2 side.

In this state, when the jack devices 14b arranged on both sides of the existing caisson 1 constituting the unit rotating means 14 are operated, the entire device deviates from a position substantially symmetrical with respect to the center of the existing caisson 1. When it is in the position, the guide arms 9, 9 are pushed by the jacks with a reaction force on the side of the existing caisson 1, and the whole device moves in the width direction of the caisson, and is substantially symmetrical with respect to the center of the existing caisson 1. is positioned at a position where Further, by operating the jack device 14b, the guide unit 5 rotatably supported by the support beam 4 is rotated, and the orientation between the guide arms 9, 9 can be adjusted.

Next, as shown in FIGS. 11 and 12, the new caisson 2 in a state of being lifted by buoyancy is moved toward the existing caisson 1 by moving means (not shown), and a pair of guide arms facing each other in the horizontal direction are moved. Pull in between 9 and 9.

The moving means includes, for example, an anchor installed on the bottom of the water at a certain distance from the installation position of the new caisson 2 and a winch installed on the new caisson 2, and a wire drawn out from the winch is used as an anchor. , the wire is paid out and wound up by a winch, and the new caisson 2 is guided to a predetermined position, ie, the joint position with the existing caisson 1 . Moreover, as a moving means, a crane, a thruster, etc. of a crane ship may be used, or the new caisson 2 may be pushed toward the existing caisson 1 by a push ship.

Next, after the new caisson 2 is pulled in between the guide arms 9, 9, the jack device 14 constituting the unit rotating means 14 is operated as shown in FIG. The guide rollers 13, 13 are brought into contact with the side surfaces of the new caisson 2, and the new caisson 2 is restrained between the two guide units 5, 5 by rotating in the approaching direction.

In this state, the guide rollers 13, 13 are in contact with the side surfaces of the new caisson 2, and the new caisson 2 is guided to an appropriate position in the width direction of the caisson. The new caisson 2 is moved to the joint position with the existing caisson 1.

At this time, the new caisson 2 is guided to a proper joint position with the existing caisson 1 because the widthwise movement of the new caisson 2 is restricted by the guide arms 9, 9 facing each other in the horizontal direction.

Next, when the new caisson 2 is joined to the existing caisson 1 at a predetermined position, water is poured into the new caisson 2 to set the new caisson 2 to the bottom of the water.

At this time, the new caisson 2 is restrained from moving in the width direction by the guide arms 9, 9 facing each other in the horizontal direction. Since there is no need for fine adjustment of the position, water can be poured continuously.

After the installation of the new caisson 2 is completed, the auxiliary installation device 3 is lifted by a crane and removed to complete the work.

The form of the auxiliary installation device 3 is not limited to the above-described embodiment. For example, as shown in FIG. may be formed. It should be noted that the same reference numerals are given to the same configurations as those of the above-described embodiment, and the description thereof will be omitted.

In this installation assisting device, guide rollers 13 and 13 are provided inside the guiding slant portion 9a, and when there is a positional deviation between the new caisson 2 and the existing caisson 1 in the caisson width direction, the slant guiding portion 9a is installed. The new caisson 2 can be guided to an appropriate position by guiding the new caisson 2 to the part 9a.

In the above-described embodiment, the installation auxiliary device 3 is installed in the existing caisson 1, but the installation auxiliary device 3 is installed in the new caisson 2 so that the existing caisson 1 and the new caisson 2 are joined. may

REFERENCE SIGNS LIST 1 existing caisson 1a joint end surface 2 new caisson 3 auxiliary installation device 4 supporting beam member 4a beam member 5 guide unit 6 arm height adjusting means 7 supporting piece 8 arm supporting member 9 guiding arm 9a guiding inclined portion 10 Rotating shaft 11 Winch 12 Operating wire 13 Guide roller 13a Bearing plate 13b Rotating shaft 13c Roller 13d Fixed base 14 Unit rotating means 14a Width adjusting piece 14b Jacking device

Claims (10)

A caisson installation aid for guiding caissons to be joined together into position, comprising:
A supporting beam mounted on the upper surface of one of the caissons, and a guide unit supported by the side of the supporting beam and arranged on the side of the one caisson,
The guide unit has a guide arm extending from the joint end face of the one caisson toward the other caisson, and the guide arm extends along the side surface of the other caisson. A caisson installation aid characterized by: 2. A caisson installation auxiliary device according to claim 1, wherein said guide unit has a plurality of guide arms in the vertical direction, and at least one of said guide arms is arranged in water. 3. A caisson installation auxiliary device according to claim 1 or 2, wherein said guiding arm portion has a guiding slanted portion extending obliquely to the outside at the leading end thereof. A caisson installation assistance device according to any one of claims 1 to 3, wherein a guide roller is arranged on the inner side of the guide arm portion so as to contact the side surface of the other caisson. A caisson installation assistance device according to any one of claims 1 to 4, further comprising arm height adjusting means for adjusting the height of said guide arm. 6. The apparatus according to any one of claims 1 to 5, further comprising a unit rotating means for rotating the guide unit rotatably supported by the supporting beam so that the angle of the guide unit can be adjusted. Caisson installation aid. The caisson installation aid according to any one of claims 1 to 6, wherein the guide units are arranged on both side surfaces of the one caisson and sandwich the other caisson between a pair of opposing guide arm portions. Device. In a caisson installation method for joining an existing caisson and a new caisson at a predetermined position, and then installing the new caisson on the ground,
A guide unit having a guide arm is installed on the side surface of either the new caisson or the existing caisson, and the guide arm is installed from the joint end surface of either the new caisson or the existing caisson. Let it protrude on the other side of either the caisson or the existing caisson,
A method for installing a caisson, wherein the guide arm is guided along the other side of the new caisson or the existing caisson to a position where the new caisson is joined to the existing caisson. 9. The method according to claim 8, wherein the guide units are arranged on both side surfaces of either the new caisson or the existing caisson, and the pair of guiding arms pinch and guide the other of the new caisson and the existing caisson. How to install the caisson. Using an auxiliary installation device in which both the guide units are supported at both ends of the supporting beam, the auxiliary installation device is hung from a predetermined position on either the new caisson or the existing caisson, and the supporting beam 10. Installation of the caisson according to claim 9, wherein the material is placed on the upper surface of either the new caisson or the existing caisson, and the guide unit is arranged on the side surface of either the new caisson or the existing caisson. Method.

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