JP2003041603A - Differential settlement preventative foundation structure of structure and horizontal adjusting method of structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the differential settlement without incurring the inclination of the structure even when the center of gravity of the structure constructed on a soft ground does not coincide with the position of the center. SOLUTION: The structure is supported by hydraulic cylinders 1, 2, 3 and 4, at the same time, the cylinders are connected to each other through piping to enable one piston of two cylinders 1 and 3 on one diagonal to provide one stroke either rising or lowering and enable the other piston of two cylinders 2 and 4 on the other diagonal to provide the other stroke, cylinder groups 10, 20, 30 and 40 consisting of the four hydraulic cylinders are arranged on the tops of a square to connect pushing sides of a pair of cylinder groups located on one opposed side are connected with the piping and, at the same time, pulling sides of a pair of cylinder groups located on the other opposed side are connected with the piping.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a horizontal adjustment method for horizontally adjusting a basic structure and an inclined structure for preventing uneven settlement of the structure.

[0002]

2. Description of the Related Art As a device for correcting the level fluctuation of a structure due to uneven settlement of soft ground, for example, Japanese Patent No. 272.
As disclosed in Japanese Patent No. 3561 (hereinafter referred to as known example 1), a large number of hydraulic cylinders for supporting a structure with respect to a floating foundation are individually provided without being communicated with each other, and a structure of each of these supporting portions is provided. Is provided, means for detecting the relative displacement of this detection level from a preset reference plane, and control means for driving the hydraulic cylinder to expand and contract so that this relative displacement becomes substantially zero are provided. There are known level correction devices for structures.

Further, in Japanese Laid-Open Patent Publication No. 11-172693 (hereinafter, referred to as a known example 2), a fluid pressure cylinder that bears each column axial force is arranged directly below a column of a structure in a process of constructing a foundation of the structure. Describes a method for reducing the differential settlement of a structural foundation provided in communication with.

Incidentally, Japanese Patent Laid-Open No. 2000-255990 describes a heavy object support device applied by the present applicant. This device is applied to the jack-up construction method. It supports four hydraulic cylinders with jacks and automatically adjusts the cylinder stroke when there is a preceding jack to ensure four-point support. is there.

[0005]

In the above-mentioned known example 1, in order to prevent uneven settlement of the structure, means for measuring the level of the structure, means for detecting relative displacement, control means for the cylinder, etc. are provided. It has to be provided, and the configuration is complicated and costly.

In the above-mentioned known example 2, since the fluid pressure cylinders are provided in parallel, the hydraulic pressure in each cylinder is always constant. Therefore, when the center of gravity of the structure deviates from the center, Since the structures have different lengths and an unbalanced load is generated to tilt the structure, it is necessary to design and specify such that the center of gravity of the structure is always located at the center, but this is extremely difficult. In order to avoid such inconvenience, it is not impossible to select the optimum cylinder from the load of the structure, the installation position, etc., but it is not easy and the cost is increased.

The present invention has been made in view of the above,
An object of the present invention is to provide a subsidence-preventing basic structure for a structure, in which the structure does not tilt even when the center of gravity of the structure is not in the center and the cost can be reduced.

[0008]

As a first means, the hydraulic cylinders 1, 2, 3 and 4 are arranged at respective apexes of a quadrangle,
By supporting the structure with these cylinders and connecting each cylinder via piping, it
By providing the pistons of one cylinder 1 and 3 with either one of the upward stroke and the downward stroke and the pistons of the two cylinders 2 and 4 on the other diagonal line with the other stroke, respectively, the unequal structure can be achieved. In the basic structure for preventing subsidence, the pressing sides of the pair of cylinders located on one of the opposing sides a, a and the other opposing sides b, b
The pulling sides of the pair of cylinders located above were connected to each other by the above pipes.

As a second means, a group of cylinders 10, 20, 30, 4 composed of a plurality of hydraulic cylinders connected in parallel is used.
0 is arranged at each apex of the quadrangle, the pushing sides of the pair of cylinder groups located on one opposing side are connected by piping, and the pulling of each pair of cylinder groups located on the other opposing side is performed. The sides were connected by piping.

As a third means, the hydraulic cylinder has the first or second means, and the hydraulic cylinder is a cylinder barrel 5.
The cylinder-shaped piston 51 is fitted into 0, and the rod-shaped piston 52 is hung from the cylinder top wall by fitting it into the cylinder-shaped piston. In addition, the inside of the cylindrical piston 51 is formed in the push-side second cylinder chamber 54, respectively, and the push-side first cylinder chamber 53 is communicated with the outside air.
The multi-chamber single-acting cylinder has a communication passage 55 and a second communication passage 56 for communicating the push-side second cylinder chamber 54 with the outside air, which is opened to the outer peripheral surface of the cylinder barrel 50.

As the fourth means, the hydraulic cylinder is installed between the structure 62 and the foundation 60 while having the first, second or third means.

As a fifth means, the hydraulic cylinder is installed between the structure 68 and the pile 66 while having the first, second or third means.

As a sixth means, there is provided a first, third, fourth or fifth means, and a pipe for connecting the pushing sides of the pair of hydraulic cylinders located on one of the opposing sides and the other. Cylinder control pumps 72 and 73 are respectively connected to the pipes connecting the pulling sides of the pair of hydraulic cylinders located on the opposite sides of the two, and the two pumps according to the inclination angle of the structure. A control means 75 capable of horizontally adjusting the structure by controlling

As a seventh means, there is provided a second, third, fourth or fifth means, and a pipe for connecting the pushing sides of the pair of cylinder groups located on one of the opposite sides and the other. Cylinder control pumps 72 and 73 are respectively connected to the pipes connecting the pulling sides of the pair of cylinder groups located on the opposite sides of the above, and two pumps are connected depending on the inclination angle of the structure. A control means 75 capable of horizontally adjusting the structure by controlling is provided.

As the eighth means, the sixth or seventh means is provided, and the cylinder control pumps 72, 73 are pumps having the same suction and discharge amounts.

As a ninth means, a temporary jack 82 installed on a foundation 80 supports and raises the hydraulic cylinder according to claim 1, 2 or 3 to form a space between the foundation and the hydraulic cylinder. Then, the height of the hydraulic jack is adjusted by inserting the adjusting member 83 into the gap, and then the temporary jack is removed.

[0017]

FIG. 1 shows an embodiment of the invention according to claim 1. The present embodiment shows a basic structure of a structure for preventing uneven settlement of a structure according to the present invention, in which a double-acting hydraulic cylinder is arranged at each apex of a virtual quadrangle, and a hydraulic cylinder located at an arbitrary apex is replaced by a hydraulic cylinder. 1, and the hydraulic cylinder 2, the hydraulic cylinder 3, and the hydraulic cylinder 4 are defined in the clockwise direction with the cylinder as the center.

Further, in the figure, two sides a, a vertically opposed to each other, are opposed to one opposite side, and two sides a horizontally opposed to each other.
The sides b and b are respectively defined as the other opposing side, and the pushing sides of the hydraulic cylinders 1, 2, 3 and 4 located on the one opposing side are connected by pipes and are located on the other opposing side. The pulling sides of the hydraulic cylinders 2, 3 and 1, 4 are connected by piping.

Next, the operation of this embodiment will be described.
It is assumed that four hydraulic cylinders are installed on a foundation (not shown) and a structure (not shown) is supported by these hydraulic cylinders. When the coordinate G of the center of gravity is (X, Y) in the plane coordinates with the center of the structure as the origin, the load applied to each hydraulic cylinder is a function of X and Y, which are different from each other. The tip of the rod comes into contact with the above-mentioned foundation (not shown) with different loads via hydraulic pressure, so that the structure is stably supported without tilting.

If one hydraulic cylinder 1 is sunk due to ground subsidence, each piston of the hydraulic cylinders 1 and 3 on one diagonal line including the cylinder extends and the hydraulic pressure on the other diagonal line extends. Cylinder 2,
Each piston in 4 contracts.

The amount of extension and contraction of each piston is 1/4 of the amount of subsidence regardless of the position of the center of gravity of the structure. Therefore, since the plane including the four hydraulic cylinders is inclined by the amount of the subsidence of the hydraulic cylinder 1 caused by the ground subsidence, the structure is inclined. A method of adjusting this inclination horizontally will be described later.

FIG. 2 shows an embodiment of the invention according to claim 2, wherein each hydraulic cylinder shown in FIG. 1 is composed of a plurality of hydraulic cylinders, and the load is evenly distributed to these hydraulic cylinders. So that they are connected in parallel.
That is, a plurality of parallel connected hydraulic cylinders 1, 2, 3,
4 as one cylinder group, such a cylinder group is arranged at each apex of a quadrangle, and the pulling sides of the cylinder groups 10, 20 and 30, 40 located on one opposing side a, a are connected by piping. At the same time, the pushing sides of the cylinder groups 20, 30 and 10, 40 located on the other opposing side b, b are connected by piping.

By arranging the hydraulic cylinders as described above, one cylinder group operates in the same manner as one hydraulic cylinder. That is, as in the case of FIG. 1, the two cylinder groups 10 and 30 on one diagonal line and the two cylinder groups 20 and 40 on the other diagonal line make strokes opposite to each other.

FIG. 3 shows another embodiment of the hydraulic cylinder. Although the double-acting cylinder is used as the hydraulic cylinder in the above, the invention is not limited to this, and it is also possible to use a double-chamber single-acting cylinder as shown in FIG. This is cylinder barrel 5
By fitting the bottomed cylindrical piston 51 into the cylinder 0 and fitting the cylindrical piston 51 into the cylindrical piston 51 from the cylinder top wall to hang the rod-shaped piston 52, the cylinder barrel 50 is pushed into the first cylinder chamber on the push side. 53 and the cylindrical piston 51
The inside is formed in each of the push-side second cylinder chambers 54.

A first communication passage 55 is formed in the cylinder barrel 50 to communicate the push-side first cylinder chamber 53 with the outside air, and one end of the second communication passage 56 is provided on the lower surface of the rod-shaped piston 52 and at the other end. The ends are opened to the outer peripheral surface of the cylinder barrel 50, respectively, so that the push-side second cylinder chamber 54 communicates with the outside air.

FIG. 4 shows an example in which the foundation structure according to the present invention is installed directly on the foundation. A pillar 61 standing upright from the footing 60 is penetrated into a slab 63 below the ground surface of the structure 62, and the pillar is provided. At the upper end of 61, the cylinder group 1 shown in FIG.
0, 20, 30, 40 are installed so that the group of cylinders supports the floor 64 of the structure. Note that the operation is the same as in the case of FIG.

FIG. 5 shows an example in which the present invention is installed on a pile head having a seismic isolation structure. The cylinder group shown in FIG. 2 is provided on the upper end of a pile 66 that penetrates the foundation slab 65 in a watertight manner through a sealing material. 10, 20, 30 and 40 are installed, a seismic isolation structure 67 is installed on the upper end of these cylinder groups, and the floor of the structure 68 is supported by the cylinder groups via these seismic isolation structures. In this case also, the operation is the same as in FIG. With this configuration, the load applied to the seismic isolation structure can be made constant, which facilitates the design.

FIG. 6 shows a device for horizontally adjusting the inclination of the structure. This device is used to adjust the inclination horizontally when the plane including the four cylinder groups is inclined due to the ground subsidence and the structure is inclined as described above. , A cylinder group 10 located on a,
Piping 70 connecting the push sides of 20 and 30, 40
And the opposite side b, the cylinder group 20 located on b,
Piping 71 for connecting the pulling sides of 30 and 10, 40
Cylinder control pumps 72 and 73 having the same intake amount and the same discharge amount are connected to the and.

Further, there is provided a control device 75 for horizontally adjusting the structure by controlling the two pumps 72 and 73 according to the signal from the inclinometer 74 for detecting the inclination angle of the structure. Specifically, horizontal adjustment is performed by moving hydraulic oil between the cylinder groups on the opposite sides a, a, b, b.

FIG. 7 shows a horizontal adjustment method for a tilted structure. Here, a case where a hydraulic cylinder 79 is installed between the pile 77 and the structure 78 as shown in (1) will be described as an example. To adjust a sloping structure horizontally (2)
As shown in FIG.
Is installed and fitted to the peripheral surface of the pile 77, and the jack 82 is installed between the frame and the hydraulic cylinder 79.

Next, as shown in (3), the jack is raised to contract the cylinder 79, thereby inserting the adjusting material 83 between the cylinder and the pile, and then the temporary mount as shown in (4). 81 and the jack 82 are removed. Note that it is possible to raise the height of the entire structure by sequentially performing such adjustment for all the hydraulic cylinders.

[0032]

In the invention according to claims 1 to 5, by connecting the hydraulic cylinders by pipes, the pistons of the two cylinders on one diagonal line have one stroke and the pistons of the two cylinders on the other diagonal line. Since the piston is provided with the other stroke respectively, the rod tip of the cylinder comes into contact with the foundation with different loads via hydraulic pressure, so that the structure can be stably supported without tilting.

Further, only by piping as described above, a means for measuring the level of the structure and a means for detecting the relative displacement are unnecessary, so that the cost can be reduced. Further, since the hydraulic cylinder is configured as described above, an unbalanced load is not generated on the foundation, which can reduce the rigidity of the foundation and the structure. Furthermore, since an unbalanced load does not occur as described above, it is possible to eliminate the need for a pile and to easily realize a pile that allows subsidence. Furthermore, since the hydraulic cylinder is configured as described above, there is no problem even if the level accuracy of the foundation is low, which makes the construction easier.

In the inventions according to claims 6 to 8, since the pump is provided in the pipe of the hydraulic cylinder, and in the invention according to claim 9, a gap is formed between the foundation and the hydraulic cylinder, and the gap is formed. Since the height of the hydraulic jack can be adjusted by inserting the adjusting member into, the horizontal adjustment can be easily performed even if the structure is inclined in any case.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a basic configuration of a basic structure according to the present invention.

FIG. 2 is a schematic diagram showing another embodiment.

FIG. 3 is a sectional view showing another embodiment of the hydraulic cylinder.

FIG. 4 is a schematic view showing an example in which the above foundation structure is directly installed on a foundation.

FIG. 5 is a schematic view showing an example in which the foundation structure is installed in a pile head seismic isolation structure.

FIG. 6 is a view equivalent to FIG. 2 similarly equipped with a leveling device for a structure.

FIG. 7 is an explanatory view showing a method of horizontally adjusting a structure.

[Explanation of symbols]

1, 2, 3, 4 Hydraulic cylinders 10, 20, 30,
40 cylinder group 50 cylinder barrel 51 tubular piston 52 rod-shaped piston 53 push side first cylinder chamber 54 push side second cylinder chamber 55 first communication passage 56 second communication passage 60, 80 foundation 62, 68 structure 72, 73 pump 75 Control device 82 Temporary jack 83 Adjustment material

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Takashi Miyazaki             Chiba Prefecture Inzai City 1-5 Otsuka 1 Stock Association             Takenaka Corporation Technical Research Institute (72) Inventor Keizo Iwashita             Chiba Prefecture Inzai City 1-5 Otsuka 1 Stock Association             Takenaka Corporation Technical Research Institute (72) Inventor Eiji Sato             Chiba Prefecture Inzai City 1-5 Otsuka 1 Stock Association             Takenaka Corporation Technical Research Institute (72) Inventor Tomio Tsuchiya             Chiba Prefecture Inzai City 1-5 Otsuka 1 Stock Association             Takenaka Corporation Technical Research Institute (72) Inventor Masahiko Higashino             Chiba Prefecture Inzai City 1-5 Otsuka 1 Stock Association             Takenaka Corporation Technical Research Institute F-term (reference) 2D046 DA18                 2E176 CC04

Claims (9)

[Claims] 1. Hydraulic cylinders 1, 2, 3 and 4 are arranged at respective vertices of a quadrangle to support a structure by these cylinders, and the respective cylinders are connected through a pipe so that one of them can be connected on a diagonal line. The pistons of the two cylinders 1 and 3 of the above structure are capable of either one of the strokes of ascending or descending, and the pistons of the two cylinders 2 and 4 on the other diagonal line of the other, respectively, so that the strokes of the other can be provided. In the basic structure for preventing uneven settlement, the pushing sides of the pair of cylinders located on one of the opposing sides a, a and the pair of cylinders of the pair of cylinders located on the other opposing side b, b. Basic structure for preventing uneven settlement of structures, characterized in that the pulling sides are connected to each other by the above-mentioned pipes. 2. A pushing side of a pair of cylinder groups located on one opposing side by arranging cylinder groups 10, 20, 30, 40, which are composed of a plurality of hydraulic cylinders connected in parallel, at each vertex of a quadrangle. A basic structure for preventing uneven settlement of a structure, characterized in that the two pipes are connected to each other and the pulling sides of the pair of cylinder groups located on the other opposite side are connected to each other by pipes. 3. The hydraulic cylinder comprises a cylinder barrel 50.
The cylindrical piston 51 is fitted into the cylindrical piston 5 and the cylindrical piston 5 is fitted into the cylindrical piston from the top wall of the cylinder.
By making 2 hang down, the inside of the cylinder barrel is formed in the push side first cylinder chamber 53, and the inside of the cylindrical piston 51 is formed in the push side second cylinder chamber 54, and at the same time, the push side first cylinder chamber 53 is formed. To communicate air to the outside
The multi-chamber single-acting cylinder in which a communication passage 55 and a second communication passage 56 for communicating the push-side second cylinder chamber 54 with the outside air are opened to the outer peripheral surface of the cylinder barrel 50. Basic structure for preventing uneven settlement of the structure described in 2. 4. The hydraulic cylinder comprises a structure 62 and a foundation 60.
The unequal subsidence prevention foundation structure for a structure according to any one of claims 1 to 3, wherein the foundation structure is installed between and. 5. The structure according to claim 1, wherein the hydraulic cylinder is installed between the structure 68 and the pile 66. 6. A pipe connecting the push sides of the pair of hydraulic cylinders located on the one opposing side, and a pipe connecting the pull sides of the pair of hydraulic cylinders located on the other opposing side. A pump 72 for controlling the cylinder,
7. A control means 75 is provided which is capable of horizontally adjusting the structure by connecting 73 and controlling the two pumps according to the inclination angle of the structure.
Basic structure for preventing uneven settlement of the structure according to 3, 4, or 5. 7. A pipe connecting the pushing sides of a pair of cylinder groups located on the one opposing side, and a pipe connecting the pulling sides of a pair of cylinder groups located on the other opposing side. Cylinder control pumps 72, 73
6. A control means 75 capable of horizontally adjusting the structure by connecting two of the pumps and controlling two pumps according to the inclination angle of the structure is provided. Basic structure to prevent uneven settlement of the structure. 8. The foundation structure for preventing uneven settlement of a structure according to claim 6, wherein the cylinder control pumps 72, 73 are pumps having the same suction amount and the same discharge amount. 9. A temporary jack 82 installed on a foundation 80 supports and raises the hydraulic cylinder according to claim 1, 2 or 3 to form a gap between the foundation and the hydraulic cylinder, and to form the gap. A method for horizontally adjusting a structure, characterized in that the temporary jack is removed after adjusting the height of the hydraulic jack by inserting an adjusting member 83 into the.