JP2003027508A - Position measuring device of immersed tube - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a position measuring device of an immersed tube caisson capable of eliminating installation error of a pedestal for mounting a sensor and improving immersed precision of the immersed tube. SOLUTION: A storage case 4 is provided in the axial direction of the immersed tube by passing through a bulkhead 3 of the immersed tube 1. A watertight coupler 5 is attached to the storage case to slidably support a sensor support shaft 6 on the watertight coupler. The sensor 2 is attached to a tip of the sensor support shaft and is pushed out in the direction of the opposing immersed tube from the inside of the tube to protrude to the outside of the tube by the sensor support shaft.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for measuring the position of a buried box. The present invention relates to an apparatus for measuring the position of a buried box, which constantly measures these positional relationships in order to adjust the position. 2. Description of the Related Art As a method of constructing a tunnel under a waterway such as a canal or a strait, there is a submerged tunnel construction method. In the submerged tunnel method, on the joint end face of the submerged
It is an important point at the time of subsidence to descend while accurately aligning the joint end faces of the newly submerged submerged box. However, since the immersion box cannot be guided visually, it is necessary to have equipment that constantly grasps the relative positional relationship between the existing immersion box and the new immersion box. At this time, since the top priority is to guide the buried box without damaging the rubber gasket, etc., it is particularly important to grasp the positional relationship after bringing the distance between the joint ends of the buried boxes closer to 10 meters or less. It becomes important. Conventionally, a position measuring sensor (ultrasonic transmission / reception device) was installed outside the immersion box (on the end steel shell) to measure the positional relationship between the immersion boxes. In order to measure the accurate positional relationship, it is necessary to install about 10 position measurement sensors, and a mount for fixing the position measurement sensors is required,
Divers attach these stands. As shown in FIG. 3, a sensor (ultrasonic transmitter) b1 is fixed to an existing immersion box a1, and a sensor (ultrasonic receiver) b is attached to a newly immersed box a2.
Fix 2 The relative positional relationship between each sensor b1, b2 and the buried center c1, c2 is offset, and the positional relationship between the centers c1, c2 of the buried a1, a2 is determined from the measured values of the sensors b1, b2. The calculation was performed by the measuring device d, and the center c1 and c2 were put together to settle the newly installed submerged box a2. The suspension wire e
And descend the newly buried box a2. [0003] However, the conventional method for measuring the positional relationship between the submerged boxes has the following problems. <B> The installation error of the sensor mounting base greatly affects the installation error of the buried box. <B> In addition, since a diver and a crane ship will be used to install the sensor mounting base, the equipment and equipment will be large, and many diving operations will be required. <C> The greater the depth and the rapid current, the more dangerous work is performed, and not only the work time is spent, but also the installation error tends to increase. SUMMARY OF THE INVENTION [0004] The present invention has been made in view of the above-mentioned conventional problems, and has been made to eliminate the installation error of the sensor mounting base and to improve the accuracy of submerging the submerged box. An object of the present invention is to provide a position measuring device for a buried box.
Another object of the present invention is to provide an apparatus for measuring the position of an immersed box that eliminates diving work and ensures safety even when immersed at a large depth. The present invention achieves at least one of the above objects. [0005] In order to achieve the above object, a position measuring apparatus for a buried box according to the present invention measures a relative positional relationship between an existing buried box and a newly buried box. A position measuring device for a buried box, comprising: a storage case penetrating through a bulk head of the buried box and installed in an axial direction of the buried box; and a watertightness attached to an end of the storage case on a side located inside the buried box. A sensor support shaft pivotally supported by the watertight coupler and configured to be movable in the housing case; and a sensor attached to a tip of the sensor support shaft, wherein the sensor is buried by the sensor support shaft. It is characterized in that it is configured to be pushed out from the inside of the box in the opposite direction of the buried box and to protrude outside the buried box. Further, in the apparatus for measuring the position of a buried box according to the present invention, since the sensor device is provided inside the buried box, the sensor device can be installed at an accurate position when the buried box is manufactured. An embodiment according to the present invention will be described below with reference to the drawings. <A> Entire Configuration A sensor (ultrasonic transmitter) 2a is installed inside an existing submerged box (submerged box already submerged at a predetermined location on the water floor) 1a. A sensor (ultrasonic receiver) 2b is also installed inside a new buried box (a buried box newly laid to be joined to the existing buried box 1a) 1b. At the time of measurement, the sensors 2a and 2b are pushed out from the inside of the immersion box 1 to the outside front surface so as to protrude in the opposite immersion box direction. The sensor 2b receives the ultrasonic pulse signal transmitted from the sensor 2a, and descends while aligning the box center 8b of the newly buried box 1b with the box center 8a of the existing buried box 1a, and laying down the newly buried box 1b. It is. <B> Sinking Box Sinking box 1 can adopt various structures such as RC (reinforced concrete) structure and steel shell structure. Submerged box 1
For example, it is manufactured by a dry dock or the like, and the joint end of the immersion box 1 is closed by the bulkhead 3. Although not shown, a rubber gasket made of an elastic material such as vulcanized rubber is attached to the periphery of the end surface of the immersion box 1 in the same manner as in the prior art, in order to ensure the waterproofness of the joint with the existing immersion box 1a. The storage case 4 is set in the axial direction of the immersion box 1 through the bulkhead 3 (see FIG. 2). The accommodation case 4 accommodates a sensor 2 described later. <C> Storage case 4 installed through storage case bulkhead 3
Is formed in a cylindrical shape with both ends open, and an inner valve 4a is provided inside the immersion box 1 with the bulkhead 3 as a boundary, and an outer valve 4b is provided outside the immersion box 1. A watertight coupler 5 that maintains watertightness is attached to the open end inside the immersion box 1 of the storage case 4. A sensor support shaft 6 is slidably supported on the watertight coupler 5, and a disk 7 is attached near the tip of the sensor support shaft 6. The outer diameter of the disk 7 is formed substantially coincident with the inner diameter of the storage case 4 so that the disk 7 can move while sliding along the inner peripheral surface of the storage case 4. It is configured to be pivotally supported. The sensor 2 is attached to the tip of the sensor support shaft 6, the rear of the sensor support shaft 6 is extended from the watertight coupler 5, and the rear end is connected to driving means such as a cylinder device (not shown). Therefore, by driving the cylinder device or the like to move the sensor support shaft 6, the sensor 2 moves in the housing case 4,
Project from the inside of the immersion box 1 to the outside front. That is, buried box 1
This is a configuration in which the sensor 2 installed inside is protruded to the front of the immersion box 1 while being pushed out. Since the vicinity of the tip of the sensor support shaft 6 is pivotally supported by the disk 7, the sensor support shaft 6 does not bend, and even if the sensor 2 projects to the outside front surface of the submerged box 1, the sensor 2 is still supported by the sensor support shaft 6. Does not deviate from the central axis of When the sensor 2 moves, the inner valve 4a and the outer valve 4b are opened. In a preparation state for submerging, the sensor 2 is housed in the housing case 4 together with the disk 7 (see FIG. 2A). During the submerging operation (at the time of position measurement), the inner valve 4a and the outer valve 4b are opened, the sensor support shaft 6 is moved, and the sensor 2 is moved forward together with the disk 7 to the housing case open end 4c, and the outer front surface of the submerged box 1 (See FIG. 2B). <D> Sensor Since the sensor 2 is housed in the housing case 4 as described above, the sensor 2 can be installed at a predetermined place inside the immersion box 1 when the immersion box 1 is manufactured. Sensor 2
Is, for example, an ultrasonic sensor. Existing buried box 1a
The ultrasonic transmitter 2a is mounted in the housing case 4 of the above, the ultrasonic receiver 2b is mounted in the housing case 4 of the newly buried box 1b, and the ultrasonic pulse is transmitted from the ultrasonic transmitter 2a to the newly buried box 1b. Then, the transmitted ultrasonic pulse is received by the ultrasonic receiver 2b. The ultrasonic transmitter 2a is connected to a transmission signal cable 13 wired inside the existing immersion box 1a. The transmission signal cable 13 protrudes above the shaft 12 through the inside of the shaft 12, and is connected to a transmission The radio wave transmission from the wave signal transmitting antenna 11 is received. The ultrasonic receiver 2b is connected to a receiving data cable 14 wired inside the newly installed submersible box 1b, and the receiving data cable 14 is connected to a control room or the like of the submerged work boat 10 through the water. . <E> Sinking Work Vessel A transmission signal transmitting antenna 11 is mounted on a sunk work boat 10. Data from the reception data cable 14 is subjected to arithmetic processing by a three-dimensional measurement processing device (not shown) in the control room, and this is transmitted to the transmission signal cable 13 by the transmission signal transmission antenna 11 by radio waves. Two submersible workboats 1
On the decks 0 and 10, a suspension winch (not shown) around which the suspension wire 15 is wound is mounted, and the four suspension wires 15 are connected to the immersion box 1b to hang down the immersion box 1b. The winding and unwinding operation of the hanging wire 15 by the hanging winch lowers the sinking box 1b while correcting the sinking position of the sinking box 1b. As before, on the deck of each submerged work boat 10, an axial operation winch (not shown) for moving the buried box 1b in the longitudinal direction (tunnel axial direction) and a lateral operation winch (FIG. (Not shown). Although not shown, the operation wire wound around each operation winch is laid out and wound around a group of sheaves on the upper surface of the immersion box 1b or fixed anchors provided on the water bottom. Next, a description will be given of a case where the relative position relationship between the existing buried box and the newly buried box is measured using the buried box position measuring apparatus of the present invention. <A> Submerged Box 1b (Container Case 4)
The inner valve 4a and the outer valve 4b are closed, and the inner valve 4a and the outer valve 4b are closed), and the tug boat is towed together with the two submerging work boats 10 and 10 to the submerging site where the existing submerged box 1a is installed. The sinking tunnel is
Since the buried boxes 1 are successively joined and constructed, the bulkheads 3 and 3 at both ends of the buried box 1b are accommodated in the storage cases 4, 4 respectively.
Is installed, and the sensor 2b is installed on the side facing the existing
And the sensor 2a is attached to the other side.
Upon arrival at the submersion site, the suspending wires 15 of the suspending winch are connected to the submerged box 1b, and the operating wires of each operating winch are connected to the sheave group on the upper surface of the submerged box 1b or fixed anchors provided on the water bottom as in the past. And wrap it around. <B> Dropping of the immersion box The water is poured into the immersion box 1b, and the hanging wire 1b of the hanging winch is pulled out while descending the immersion box 1b. <C> Submerging work (position measurement) During the submerging work in which the relative positional relationship between the existing submerged box 1a and the new submerged box 1b must be measured (at the time of position measurement), the existing submerged box 1a and the new submerged box are used. 1b each inner valve 4
a and the outer valve 4b are opened, and the respective sensor support shafts 6 are moved to advance the sensor 2 to the housing case open end 4c and protrude to the outside front surface of the immersion case 1 (FIG. 2).
(B)). That is, the ultrasonic transmitter 2a is connected to the existing
a of the receiving case open end 4c and the ultrasonic receiver 2
b is protruded from the open end 4c of the housing case of the newly buried box 1b so that the ultrasonic pulse from the ultrasonic transmitter 2a can be received by the ultrasonic receiver 2b. As before, the ultrasonic transmitter 2a, the ultrasonic receiver 2b and the box centers 8a, 8b
Offset the relative positional relationship with. An ultrasonic pulse is transmitted from the ultrasonic transmitter 2a to the newly buried box 1b by a transmission signal transmitted to the transmission signal cable 13 by the transmission signal transmission antenna 11. The ultrasonic pulse is received by the ultrasonic receiver 2b. The received ultrasonic pulse is processed by a three-dimensional measurement processing device (not shown) via the reception data cable 14. As described above, while transmitting and receiving the ultrasonic pulse, the box center 8 of the existing immersion box 1a.
The relative positional relationship between a and the center 8b of the newly buried box 1b is determined in three dimensions, and the buried box 1b is laid down by combining the box centers 8a and 8b. Based on the measurement result, when the immersion box 1b is displaced in the axial direction of the tunnel from, for example, the expected landing position (the position where the container centers 8a and 8b coincide), the axial operation winch is operated. The submerged box 1b is moved in the axial direction of the tunnel by a predetermined distance. In addition, when the submerged box 1b is shifted laterally from the expected landing position, the correct position is corrected by operating the winch for lateral operation. Correct the submerged box 1b to the correct position and set the box centers 8a, 8b
After that, the sensor support shaft 6 is pulled in from the inside of the submerged boxes 1a and 1b, the sensor 2 is housed in the housing case 4, and the inner valve 4a and the outer valve 4b are closed. <D> Joining of the buried box As described above, after the buried box 1b is laid down by combining the box centers 8a and 8b, the buried box 1b is pulled in from the existing buried box 1a side, and the water pressure is used. The submerged boxes 1a and 1b are joined together. The water remaining between the bulkheads 3 of the existing immersion box 1a and the new immersion box 1b is eliminated, and the respective bulkheads 3 are removed and permanent joints are constructed from inside. According to the present invention, the following effects can be obtained. <B> The sensor is stored in the storage case inside the buried box,
During measurement, the sensor is pushed out from the inside of the immersion box to the opposite immersion box and protrudes to the outside of the immersion box, eliminating diving work and ensuring the safety of the immersion box position measurement device even when sunk at a large depth Can be provided. <B> Since the installation position of the sensor can be accurately determined at the time of production of the immersion box, the installation error of the mounting frame for the sensor can be eliminated, and the immersion box can be installed with improved accuracy. <C> In addition, since the sensor can be installed inside the buried box at the time of making the buried box, there is no need to install a sensor mounting base with a diver and a crane ship as in the past. Eliminates the need for large-scale equipment and does not require any working time. In particular, the greater the depth and the rapid current, the more dangerous work and the longer the work time, but all these problems can be solved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory view showing a position measuring device for a sinking box according to the present invention. FIGS. 2A and 2B are explanatory diagrams of a sensor, and FIG. 2A is a diagram showing the sensor in a preparation state for submerging. (B) is a diagram showing the sensor during the laying operation. FIG. 3 is an explanatory view showing a conventional position measuring device. [Description of Signs] 1 ... Sinking box 2 ... Sensor 3 ... Bulk head 4 ... Storage case 5 ... Watertight coupler 6 ... Sensor support shaft 7 ... Disc 8 ... Hakodate Center 10 ・ Sinking work boat

   ────────────────────────────────────────────────── ─── Continuation of front page    (72) Inventor Kenichi Kaneko             1-25-1, Nishi Shinjuku, Shinjuku-ku, Tokyo Taisei             Construction Co., Ltd. F term (reference) 2D055 AA09 BB03 EA03 LA13

Claims (1)

Claims 1. An apparatus for measuring the relative positional relationship between an existing buried box and a new buried box, comprising: a shaft of the buried box penetrating through a bulkhead of the buried box. A storage case installed in a direction, a watertight coupler attached to an end of the storage case located inside the buried box, a sensor support rotatably supported by the watertight coupler and configured to be movable in the storage case. A shaft, and a sensor attached to a tip of the sensor support shaft. The sensor support shaft pushes the sensor from the inside of the sunk box to the opposite sunk box direction, and is configured to protrude to the outside of the sunk box. The position measurement device for the buried box.