JPH0451764B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for measuring the inclination of an embedded steel plate cell body.

[Prior art]

In recent years, as the use of Japan's sea areas has become more diverse and sophisticated, there has been an urgent need to realize deep-water structures with higher precision.In order to meet this demand, pre-integrated steel plates have been developed. The steel plate cell construction method, in which the cell body is driven directly into the seabed, is used.

In this construction method, multiple vibrohammers are operated in synchronization to drive the steel plate cell body while transmitting powerful vibration energy evenly to the steel plate cell body, and then filling sand is immediately poured in to create a strong wall. This system is attracting attention as a construction system that allows offshore construction of deep-water structures to be carried out quickly, accurately, and economically.

However, when driving the steel plate cell body in the above-mentioned embedded steel plate cell construction method, it is important to always maintain the levelness of the steel plate cell body. Control is the most important thing in order to perform an accurate vertical drive.

[Purpose of the invention]

The present invention has been made for the purpose of providing a method for measuring the inclination of a steel plate cell body that can obtain information on the levelness of the steel plate cell body in real time when driving the steel plate cell body in the above-mentioned embedded type steel plate cell construction method. It is something.

[Structure of the invention]

In order to achieve the above object, the inclination measurement method of a steel plate cell body of the present invention is based on the method of measuring the inclination of a steel plate cell body by placing upwardly open liquid storage bodies on two opposing points of a base ring placed on a steel plate cell body. and communicate them with a communication pipe, and near the liquid storage body,
A pressure receiving body is provided that communicates the communication pipe and the liquid storage body with a liquid, and a gas layer is provided on top of the liquid in the pressure receiving body to seal it, and the liquid storage body, the communication pipe, and the pressure receiving body are communicated by these liquids. At least one more pair of sets are provided in a direction perpendicular to the two opposing points, and the upper portions of the opposing pressure receiving bodies are connected to respective pressure transducers to detect the pressure difference between the opposing pressure receiving bodies. This method is characterized by measuring the inclination of a steel plate cell body.

[Embodiments of the invention]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a method for measuring the inclination of a steel plate cell body during construction using the steel plate cell construction method will be described below with reference to the drawings.

First of all, this embedded steel plate cell construction method is
As shown in the figure, in order to directly drive the pre-integrated steel plate cell body 1 into the seabed ground 2 below the water surface WL, after positioning, the upper end of the steel plate cell body 1 is hydraulically driven as shown in Figure 4-B. The chuck 3 is integrated with the base ring 4, and a hook 15 of a crane ship or the like (not shown) is mounted on the base ring 4.
A plurality of vibrohammers 6 are interposed between the hanging hardware 5 suspended by the base ring 4, and these vibrohammers 6 are connected by a shaft 7 and operated in synchronization to transmit strong vibrational energy through the base ring 4. The steel plate cell bodies 1 are poured into the seabed ground 2 all at once while the steel plate cell bodies 1 are evenly distributed, and after casting, filling sand 8 is filled as shown in Fig. 4-C to complete the casting. It is.

Next, as shown in FIG. 1, upwardly open liquid storage bodies each containing a liquid L such as water are placed on two opposing points of the base ring 4 positioned above the steel plate cell body 1 as described above. 9 are erected, and their bottoms are communicated with a communication pipe 10, and a pressure receiving body 11 is provided near each liquid storage body 9, in which the communication pipe 10 and the liquid storage body 9 are communicated with each other by liquid L, and the pressure receiving body 11 is provided in the vicinity of each liquid storage body 9. body 11
A gas layer A is provided above the liquid L and sealed,
Each of the gas layers A is connected to a pressure transducer 12 that converts the pressure of each gas layer A into a signal. This gas layer A is provided in order to reduce the influence of vibration since the steel plate cell body 1 is hammered with a vibrohammer.

In addition, in Fig. 1, the dashed line indicates:
This shows the state when the steel plate cell body 1 is tilted. Even in this case, the liquid L of the pair of liquid storage bodies 9 is maintained at the same level by the action of the level communication pipe 10, and each gas layer of the pressure receiving body 11 is kept at the same level. Since a pressure difference D appears only in the pressure A, the inclination of the steel plate cell body 1 can be measured by detecting this and converting it into an inclination angle.

Note that the communication pipe 10 may be a pipe-shaped pipe such as a vinyl pipe, and the liquid storage body 9 may also be a vinyl pipe or the like supported by a stay member.

As shown in FIG. 2, each pair of opposing liquid storage bodies 9, communication pipe 10, pressure receiving body 11, etc. is connected to at least one other set, and a line connecting the pair of opposing liquid storage bodies 9 is connected to the set. installed at right angles,
The upper parts of these opposing pressure receiving bodies 11 are connected to pressure transducers 12, and the pressure difference D between the opposing pressure receiving bodies 11 is detected and displayed in digital form on, for example, a cathode ray tube 13 as shown in FIG. This allows the driver to grasp the pouring status in real time.

Based on the inclination of the steel plate cell body 1 measured as described above, the inclination angle of the hanging hardware 5 suspended from the hook 15 of a crane ship etc. can be adjusted, the angle of the oar of the crane ship etc. can be adjusted, and the angle of the oar of the crane ship can be adjusted. The steel plate cell body 1 is driven vertically by driving by vibration of the vibrohammer 6 while making adjustments to drive the steel plate cell body 1 vertically by means such as movement.

In the above embodiment, two sets of liquid storage bodies 9, communication pipes 10, pressure receiving bodies 11, etc., which are open above each pair facing each other, are provided, but if a larger number of sets are provided, it will be more accurate. It is possible to perform accurate slope measurements.

〔Effect of the invention〕

As explained above, by adopting the inclination measurement method of the present invention, information on the levelness of the steel plate cell body when driving the steel plate cell body can be grasped in real time, and the orientation of the steel plate cell body can be immediately determined based on that information. can be adjusted, it becomes possible to carry out accurate embedding type steel plate cell construction, and the casting work can be carried out quickly and accurately.

In addition, the present invention does not allow the steel plate cell body to simply provide pressure receiving bodies on two opposing points of the base ring positioned on the steel plate cell body and provide fluid communication between the opposing pressure receiving bodies through a communication pipe. Since the inclination is expressed only by the difference in the vertical change in the liquid level in the two opposing pressure receiving bodies, in that case, if the difference between the two is small, it may not be possible to accurately determine the inclination angle. Therefore, in the present invention, separate liquid storage bodies are provided in the vicinity of both pressure receiving bodies, and the liquid therein is communicated with the liquid in the pressure receiving body, and the upper part of the liquid storage body is open. When is tilted, the liquid storage body is also tilted, and since the liquid level in the pair of liquid storage bodies is constant, a difference occurs in the distance between the position of the pressure transducer above the pressure receiving body and the liquid level position of the liquid storage body. This difference is added to the paired pressure receiving bodies, thereby increasing the pressure difference between the pressure receiving bodies, making it possible to measure the inclination angle more accurately.

If the upper part of the liquid container is closed and sealed, if the liquid container is tilted, even if the liquid tries to flow to the lower side, the sealed chamber will immediately become pressurized and the flow of liquid to the lower side will be impeded. , accurate angle measurements cannot be made.

Furthermore, in the present invention, inclination angles in various directions can be measured by increasing the number of pairs of two opposing points in different directions so that the inclination can be measured in any direction.

[Brief explanation of the drawing]

FIG. 1 is a schematic side sectional view of an embodiment of a device for measuring the inclination of a steel plate cell body during construction of a steel plate cell to which the inclination measurement method for a steel plate cell body of the embedded type according to the present invention is applied;
FIG. 2 is a schematic plan view of FIG. 1, FIG. 3 is a drawing showing the display section of the cathode ray tube device that displays the measurement results of the inclination measuring device of FIG. 1, FIG. 4-A, FIG. 4-B, and Figure 4-C is a series of side views showing the embedded steel plate cell construction method. 1... Steel plate cell body, 4... Base ring, 9...
...Liquid storage body, 10...Communication pipe, 11...Pressure receiving body, 12...Pressure transducer, A...Gas layer, D...
Pressure difference, L...Liquid.

Claims (1)

[Claims] 1. Liquid storage bodies each opened upward are erected on two opposing points of a base ring located on a steel plate cell body, and these are communicated by a communication pipe, and a communication pipe is provided near the liquid storage body. A set consisting of a liquid storage body, a communication pipe, and a pressure receiving body, which are provided with a pressure receiving body that communicates the pipe and the liquid storage body with a liquid, and are sealed by providing a gas layer on top of the liquid in the pressure receiving body. At least one other pair of pressure receptors are provided in a direction perpendicular to the line connecting the two opposing points, and the upper portions of the pressure receptors facing each other are connected to pressure transducers to detect the pressure difference between the pressure receptors facing each other. A method for measuring the inclination of an embedded steel plate cell body.