JP2003321832A - Ground improvement method and ground improvement device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a ground improvement method and a ground improvement device for various uses capable of aiming at a simple system, shortening of a construction period and reduction of a construction cost. <P>SOLUTION: A method forming an improvement body by inserting an injection pipe having from one to several places of injection ports in the ground and drawing at a predetermined speed while injecting a high-pressure of water containing a hardener liquid or a hardener from the injection ports in the predetermined direction as the ground improvement method forms the improvement body in a predetermined or an optional radiate shape. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to the stability of soft ground,
The present invention relates to a ground improvement method and a ground improvement device used for the purpose of ground support, tunnel support, structure foundation, structure foundation reinforcement, liquefaction prevention, underground wall for water blocking, groundwater seepage prevention, etc.

[0002]

2. Description of the Related Art Conventionally, a CCP method, a JSG method, and the like have been known as methods for constructing an improved body on the ground by inserting an injection pipe into the ground and injecting a high-pressure jet of water containing a curing agent. In either method, the injection pipe is raised while constantly rotating at a constant speed, and a high-pressure jet of water containing a curing agent is injected at high pressure from the lower end of the injection pipe and injected into the ground to form a columnar improved body. It was Further, the present applicant has a patent No. 1946033.
No. 4 developed a quadrangular prismatic improvement body, but all of them were for the purpose of improving the ground.

[0003]

In the prior art, the object of ground improvement is to improve the entire amount or to expand the construction pitch and reduce the strength by uncoupling in response to the demand for low strength. In many cases, it will be over-constructed if the total amount is improved,
There are problems such as negative impact on the environment and high cost, and in the case of low strength requirements, individual improvement bodies are scattered without connection,
Not only was the strength extremely reduced, but it could not be used for water stopping purposes. In addition, there is no idea to improve the ground by radial injection, which is a much smaller amount of injection than the cylindrical shape, and the method of constructing a relatively thin plate-shaped improvement body or radial arrangement fan-shaped connection improvement body There was no method of cross-connecting a body or a radial arrangement fan-shaped improved joint to a wide range of arbitrary shapes such as a net or a block, and constructing an improved area as a whole.

[0004]

Therefore, in view of the above-mentioned circumstances, the present invention proposes, as a new ground improvement technique, one or several injection ports to make the shape of the improved body a predetermined or arbitrary radial shape. In a method of forming an improved body by inserting an injection pipe having in the ground, and drawing out at a predetermined speed while injecting a high-pressure jet of water containing a curing agent liquid or a curing agent from this injection port in a prescribed direction, The ground improvement method was used in which the shape of the improved body was set to a predetermined or arbitrary radial shape by pulling out or inserting the injection pipe.

Further, according to the present invention, an injection pipe having one or several injection ports is inserted into the ground so as to form a regular or irregular branch-like improved body, and the hardening agent liquid or In a method of constructing an improved body by drawing out a high-pressure jet of water containing a hardening agent in a predetermined direction at a predetermined speed, an operation of stopping the injection port at an arbitrary or predetermined position and injecting it for a predetermined time, , The ground improvement method is to strengthen the ground by performing radial injection by repeating the operation of rotating and moving the injection pipe to an arbitrary or predetermined position.

Further, the present invention provides a wall-shaped improvement body,
Improved by inserting an injection pipe with one or several injection ports into the ground and pulling out a high-pressure jet of a hardening agent liquid or water containing the hardening agent in a specified direction from this injection port at a specified speed. In the method of constructing the body, the operation of stopping the injection port at an arbitrary or predetermined position and injecting for a predetermined time and the operation of rotationally moving the injection pipe to an arbitrary or predetermined position are repeated to form the first stage radial improvement body. After constructing the structure, after pulling out or inserting the injection pipe for a specified length and moving the position of the injection port, at the extension point of the radial improvement body of the first stage, perform the same operation as the first stage A ground improvement method is provided in which a plate-shaped radial improvement body is formed by repeating the operation of forming the improvement body and pulling out or inserting the injection pipe of a predetermined length a predetermined number of times.

Further, in the present invention, an injection pipe having one or several injection ports is inserted into the ground in order to form a plate-like improved body, and a hardening agent liquid or water containing a hardening agent is injected from the injection holes. In the method of constructing the improved body by injecting the high-pressure jet of 3 in a predetermined direction and withdrawing at a predetermined speed, a plate-shaped improved body is formed by pulling out or inserting an injection pipe, and a plurality of plate-shaped improved bodies Was arranged in a predetermined or arbitrary radial shape to provide a ground improvement method in the form of a plate-shaped radial improvement body.

Furthermore, in the present invention, an injection pipe having one or several injection ports is inserted into the ground so as to form a cross-joined improved body, and a curing agent liquid or a curing agent is introduced from this injection port. In a method of constructing an improved body by drawing out a high-pressure jet of water containing water containing water with a predetermined speed while injecting it in a predetermined direction, the operation of arbitrarily or stopping the injection port at a predetermined position and injecting for a predetermined time After repeating the operation of rotating and moving the injection pipe to a predetermined position to create the radial improvement body of the first stage, after pulling out or inserting the injection pipe of a predetermined length and moving the position of the injection port, the radial of the first stage At the extension point of the improvement body, the same operation as the first step is performed to create the radial improvement body of the second step, and the operation of pulling out or inserting the injection pipe of a predetermined length is repeated a predetermined number of times to obtain a plate-like radial shape. Improved body Construction and to obtain a soil improvement method to construct a integrated improvement zone of any shape such as reticulated improved area by the plate-like improved body more connecting cross the reclamation or linking reclamation.

Further, in the present invention, at the time of crossing or connecting, the hardening condition of the pre-improved soil is set at one place or at several places in order to make it an improved body within a relatively short period of time which is equal to or less than the strength of the conventional soil. A method of inserting an injection pipe having an injection port into the ground and extracting a hardening agent liquid or a high-pressure jet of water containing a hardening agent in a specified direction from this injection port at a specified speed to create an improved body Therefore, the operation of stopping the injection port at an arbitrary or predetermined position and injecting for a predetermined time and the operation of rotationally moving the injection pipe to an arbitrary or predetermined position are repeated to form the radial improvement body of the first stage After pulling out or inserting the length injection pipe and confirming the position of the injection port, at the extension point of the first stage radial improvement body, perform the same operation as the first stage and create the second stage radial improvement body The length of the injection pipe By repeating the inserting operation a predetermined number of times, a plate-like radial improvement body is created, and a plurality of connecting and forming cross-connections are made while the strength of the plate-like radial improvement body to be cross-connected or connected is approximately the same as the strength of conventional soil. Alternatively, a ground improvement method was adopted in which a consolidation improvement area of any shape, such as a mesh improvement area, was created by making a connection.

Furthermore, in order to provide an improved body having a partitioning plate-shaped improved body, the present invention inserts an injection pipe having one or several injection ports into the ground, and a curing agent liquid or In a method of constructing an improved body by drawing out a high-pressure jet of water containing a hardening agent in a predetermined direction at a predetermined speed, an operation of stopping the injection port at an arbitrary or predetermined position and injecting it for a predetermined time, After repeating the operation of rotating and moving the injection pipe to an arbitrary or predetermined position to form the radial improvement body of the first stage, after pulling out or inserting the injection pipe of a predetermined length and moving the position of the injection port, the first stage At the extension point of the radial improvement body of, the same operation as the first step is performed to form the radial improvement body of the second step, and the operation of pulling out or inserting the injection pipe of a predetermined length is repeated a predetermined number of times to form a plate shape. Radial break With the formation of the body, at a predetermined place during the formation, by forming a partitioning plate-shaped improvement body at a right angle or at an arbitrary angle with the plate-shaped improvement body, by embedding the unmodified soil in a block shape The ground improvement method was used to create an accumulation improvement area.

Furthermore, according to the present invention, in order to make the improved body a stress body, an injection pipe having one or several injection ports is inserted into the ground, and a hardening agent liquid or a hardening agent is introduced from this injection port. In a method of constructing an improved body by drawing out a high-pressure jet of water containing water containing water with a predetermined speed while injecting it in a predetermined direction, the operation of arbitrarily or stopping the injection port at a predetermined position and injecting for a predetermined time After repeating the operation of rotating and moving the injection pipe to a predetermined position to create the radial improvement body of the first stage, after pulling out or inserting the injection pipe of a predetermined length and moving the position of the injection port, the radial of the first stage After constructing the improved body, pulling out or inserting the injection pipe for a predetermined length and moving the position of the injection port, then at the extension point of the radial improved body of the first stage, perform the same operation as the first stage and perform the second stage. Create radial improvement body By repeating a predetermined number of times an operation of inserting or pulling out a predetermined length injection pipe while construct a plate-like radial improvement body, at a predetermined position in the middle reclamation,
The unmodified soil is incorporated into a block by forming a partitioning plate-shaped improved body at a right angle or an arbitrary angle with the plate-shaped improved body, and the block-shaped integrated improved body integrated with the unmodified soil is used as a stress body. The ground improvement method was adopted.

According to the present invention, an injection pipe having one or several injection holes is inserted into the ground so that the improved body has a cross-sectional shape of any desired or predetermined radial arrangement fan-shaped combination, and the improvement pipe is cured from this injection hole. In a method of constructing an improved body by ejecting a high-pressure jet of water containing a liquid agent or a hardening agent in a predetermined direction at a predetermined speed, rotating an injection port at an arbitrary angle or at an arbitrary angle in a predetermined position. Due to
The ground improvement method was adopted in which the cross-sectional shape of the improved body was a fan-shaped combined body having an arbitrary or predetermined radial arrangement.

Further, according to the present invention, an injection pipe having one or several injection ports is inserted into the ground so as to provide an arbitrary or predetermined radial arrangement fan-shaped connection improving member, and the hardening agent liquid or In a method of constructing an improved body by ejecting a high-pressure jet of water containing a curing agent in a prescribed direction while withdrawing it at a prescribed speed, withdrawing or inserting the ejection port while rotating the ejection port at an arbitrary angle or at an arbitrary angle. By doing so, a ground improvement construction method for creating an arbitrary or predetermined radial arrangement fan-shaped joint improvement body was obtained.

Furthermore, according to the present invention, an injection pipe having one or several injection ports is inserted into the ground to provide an arbitrary or predetermined radial arrangement fan-shaped joint improving member, and the curing agent liquid or In a method of constructing an improved body by ejecting a high-pressure jet of water containing a curing agent in a prescribed direction at a prescribed speed, is there an operation of rotating the ejection port at an arbitrary angle or at a prescribed position and withdrawing it? By repeating the inserting operation, a ground improvement method was created in which an arbitrary or predetermined radial arrangement fan-shaped joint improvement body was created.

Furthermore, according to the present invention, an injection pipe having one or several injection ports is inserted into the ground so as to provide an arbitrary or predetermined radial arrangement fan-shaped joint improving member, and the hardening agent liquid is injected from this injection port. Alternatively, in a method of constructing an improved body by ejecting a high-pressure jet of water containing a curing agent in a predetermined direction at a predetermined speed, the first stage by rotating the injection port at an arbitrary angle or at a predetermined position After forming the radial arrangement fan-shaped combined body, after pulling out or inserting the injection pipe of a predetermined length and moving the position of the injection port, at the extension point of the first-stage radial arrangement fan-shaped combined body, the same as in the first step By performing an operation to form a second radial arrangement fan-shaped combined body, and repeating an operation of pulling out or inserting the injection pipe of a predetermined length a predetermined number of times, an arbitrary or predetermined radial arrangement fan-shaped combination improving body is obtained. Was a soil improvement method to be formed.

Furthermore, according to the present invention, an injection pipe having one or several injection ports is inserted into the ground in order to create an accumulation improvement region of any shape such as a mesh improvement region, and this injection is performed. In a method of constructing an improved body by ejecting a high-pressure jet of hardening agent liquid or water containing a hardening agent from a mouth at a predetermined speed while ejecting it in a predetermined direction, the injection port can be set at an arbitrary angle or at an arbitrary angle at a predetermined position. After rotating and creating the first radial arrangement fan-shaped combined body, after pulling out or inserting the injection pipe of a predetermined length and moving the position of the injection port, at the extension point of the first-stage radial arrangement fan-shaped combined body, The same operation as the eye is performed to form the second radially arranged fan-shaped combined body, and the operation of pulling out or inserting the injection pipe of a predetermined length is repeated a predetermined number of times, so that the arbitrary or predetermined radially arranged fan-shaped combined body is improved. And reclamation, the radial arrangement fan coupling improved body by plural connecting cross or linking reclamation, was ground improvement method to construct a integrated improvement zone of any shape such as reticulated improved range.

Furthermore, according to the present invention, an injection pipe having one or several injection ports is inserted into the ground in order to integrally form the radially arranged fan-shaped joint improving member and the partitioning plate-like improving member. In a method of constructing an improved body by drawing out a high-pressure jet of a hardening agent liquid or water containing a hardening agent from a jet port at a predetermined speed while jetting it in a predetermined direction, the jet port can be set at an arbitrary position or at a predetermined position. After moving the position of the injection port by pulling out or inserting the injection pipe of a predetermined length after rotating the angle to create the first stage radial arrangement fan-shaped combination body,
At the extension point of the first radial arrangement fan-shaped assembly, the same operation as in the first step is performed to form the second-stage radial arrangement fan-shaped assembly, and the operation of pulling out or inserting the injection pipe of a predetermined length is specified. By repeating the number of times to create an arbitrary or predetermined radial arrangement fan-shaped bond improver, at a predetermined position in the process of forming a partitioning plate-like improver at a right angle or at an arbitrary angle with the radial arrangement fan-like bond improver,
This is a ground improvement method in which the radially arranged fan-shaped joint improving body and the partitioning board-like improving body are integrally formed.

Furthermore, the present invention provides a ground improvement apparatus having a corresponding construction means, means for inserting an injection pipe into the ground, and a hardening agent liquid or a hardening agent from the injection port of the injection tube. And a means for pulling up or inserting a high-pressure jet of water containing water in a predetermined direction to form the improvement body in a predetermined or arbitrary radial shape.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below based on specific embodiments shown in the accompanying drawings.

The injection pipe 1 used in the present invention has one or several injection ports 2. Non-rotating construction wall thickness 1
The injection ports 2 are arranged in parallel or obliquely as shown in FIG. 1 so as to be about cm to 20 cm. Further, in the case of forming the radially arranged fan-shaped coupling improving body, in addition to the injection pipe of FIG. 1, a structure in which a large number of injection ports 2 are arranged as shown in FIG. 2 may be used.

The cross-sectional shape of the injection pipe 1 may be either circular or rectangular, and the injection port 2 may be provided at one location or at several locations, and the direction may be unidirectional or multidirectional. In addition, all the injection ports 2 may be used at the same time, or only arbitrary positions may be used.

In FIG. 3, the two injection ports 2 are arranged in substantially the same direction.
It is an example of arrangement, and reference numeral 11 is a supersonic wave for measuring a slurry distance.
It is a wave sensor. One or several curing in the injection pipe
The agent passage is connected to each injection port, and water containing the curing agent
200-500 kgf / cm ²High pressure jet
And eject it into the ground. It should be noted that only the water containing the curing agent alone
Sometimes it is injected, but it should be injected together with compressed air.
There is also.

FIG. 4 shows an example in which six injection ports 2 are evenly arranged so as to face each other, and reference numeral 11 is an ultrasonic sensor for measuring slurry distance. Inside the injection pipe, one or several hardening agent passages are connected to the respective injection openings, and water containing the hardening agent is injected into the ground as a high-pressure jet of about 200 to 500 kgf / cm ² . In some cases, only the water containing the curing agent is sprayed alone, but in some cases it is sprayed together with the compressed air.

The case where the injection pipe of FIG. 3 is used will be described.

First, as shown in FIG. 5, the injection pipe 1 is inserted into the target ground 3 by a proper means such as a boring machine 4 or an earth auger to a predetermined depth. Here, the creation machine is provided with a management device 12 having a function of measuring and adjusting the injection angle, the injection time, the pulling speed, the depth, the slurry distance and the like.

Subsequently, water containing a hardening agent such as high-pressure cement milk that has passed through the hardening agent passage of the injection pipe 1 is jetted from the jet port 2 for an arbitrary time, rotated, stopped jetted again, and spun for a predetermined number of times. By carrying out, a radial improved body having an arbitrary number in a predetermined or arbitrary direction can be formed.

For example, when using the injection pipe of FIG. 3 to form radial improved bodies in 6 directions at equal intervals, after stopping injection for 2 seconds, rotating by 60 degrees, stopping injection for 2 seconds, and further rotating by 60 degrees. By performing the stop injection for 2 seconds, 6
A radial improvement 5 can be created.

Next, the injection pipe 1 is set to 2 to 5 per step.
While raising by about cm, the radial improvement bodies 5 in 6 directions up to a predetermined height can be formed as shown in FIG.

Further, instead of stopping at each step, the above operation may be performed while pulling up at a predetermined speed.

When the partition plate-shaped improvement body 6 is formed at an arbitrary position, for example, an intermediate part, the injection pipe 1 is rotated at a constant speed at a predetermined depth position so that the partition plate-shaped improvement body as shown in FIG. 6 and the radial improvement body 5 can be integrally formed.

Further, if the pull-out distance per step is lengthened, the regular branch-like improving body 12 can be formed as shown in FIG. 9, and the rotational movement of the injection pipe 1 is performed irregularly. Irregular branch improvers 13 such as 10 can be created.

Further, a plurality of plate-shaped improvement bodies may be arranged in a predetermined or arbitrary radial shape to form a plate-shaped radial improvement body.

As shown in FIG. 11, the injection pipe 1 is inserted at a predetermined depth, and water containing a hardening agent such as high-pressure cement milk that has passed through the hardening agent passage of the injection pipe 1 is jetted from the jet port 2 for an arbitrary time. When it is pulled out to a predetermined depth, the plate-shaped improvement body 7 of FIG. 12 can be formed. Next, the injection pipe 1 is inserted again at a predetermined depth, the injection port is positioned at an arbitrary angle with respect to the plate-shaped improvement body 7, and the high-pressure cement milk or the like is cured through the curing agent passage of the injection pipe 1. When the water containing the agent is ejected from the ejection port 2 for an arbitrary time to a predetermined depth and the same operation is performed again, the three plate-shaped improved bodies 7 are integrally formed.
It can be constructed as 3 and as 6 direction radial improver 5.

FIG. 14 shows an example in which four-direction radial improvement bodies 5 are cross-connected to each other in the front-rear direction and the left-right direction at regular intervals to form a quadrangular accumulation improvement area.

In FIG. 15, after the post-stop injection, the post-stop injection is rotated by 40 degrees to the stop injection, then rotated by 140 degrees to the stop injection, further rotated by 40 degrees to the stop injection, and again rotated by 140 degrees, and step-up is performed after the stop injection. The non-equidistant four-direction radial improvement body 5 repeatedly formed to a predetermined depth is shown in FIG. In this case, the above-described operation may be performed while pulling up at a predetermined speed instead of stopping at each step.

FIG. 16 shows an example in which a plurality of them are connected and formed in one direction, and the plate-like improving body 7 is formed on both sides thereof to form a network-like accumulation improving area.

FIG. 17 shows an example in which a plurality of multidirectional radial improving bodies 5 are irregularly connected to form a network-like accumulation improving area.

While forming the plate-shaped radial improvement body 5,
At a predetermined place in the process of forming, a partitioning plate-shaped improvement body 6 is formed at a right angle to the plate-shaped improvement body 7, and a plurality of these are cross-linked to form a net-like accumulation improvement area, and unmodified soil is wrapped in blocks. The combined example is shown in FIG. The unmodified soil that has been wrapped in a block shape can be integrated with the plate-shaped improvement body 7 and the partition-board-shaped improvement body 6 and used as a stress body.

Further, FIG. 19 shows an example in which the injection pipe 1 shown in FIG. 4 is used to form the radially arranged fan-shaped combined body 8 with an angle of 30 degrees and six directions. At this time, the radial arrangement fan-shaped coupling body 8 can be formed only by rotating the injection pipe 1 at a predetermined speed by 30 degrees, and the injection pipe 1 can be rotated at a predetermined speed by 60 °.
By rotating it once, it is possible to form an improved whole circle as shown in FIG.

In FIG. 19, the injection pipe 1 is placed at a position 30 from the starting position.
After rotating up to about 2 to 5 cm per step, it was rotated about 30 degrees to the left, and again about 2 to 5 cm per step.
Rotate 0 degrees to the right. FIG. 21 shows an example in which the radial arrangement fan-shaped coupling improvement body 9 in six directions up to a predetermined height is formed by repeating this operation.

In this case as well, the above operation may be performed while the speed is raised at a predetermined speed instead of stopping at each step.

Further, in FIG. 22, by using the injection pipe 1 having four injection ports 2, radial arrangement fan-shaped coupling improving bodies 9 in four directions are cross-connected to each other in a front-rear direction and a left-right direction at predetermined intervals to form a quadrangular accumulation. An example of creating an improved area is shown below.

When the partition plate-shaped improvement body 6 is formed at an arbitrary position, for example, an intermediate portion, the injection pipe 1 is rotated at a constant depth at a predetermined depth position, so that the partition plate-shaped improvement body as shown in FIG. 6 and the radial arrangement fan-shaped joint improving body 9 can be integrally formed.

It should be noted that the present invention is not limited to the vertical direction, but is not limited to FIG.
As shown in FIG. 4, it can be used in a horizontal direction or an oblique direction.

The present invention can be applied not only to the formation of the radial improvement body but also to the formation of the cylindrical improvement body.

Further, after constructing the lattice-improved area and the mesh-improved area, the soil quality of the non-improved area is separately improved to enhance the strength and water-stopping effect for each area, and the soil quality of the non-improved area Partial observation of pollution and water pollution can be performed.

In the present invention, when a mesh-like accumulation improving body as shown in, for example, FIG. 18 is formed, when water penetrates from the left side to the right side of the drawing, the wall body and the radial improvement of the plate-like improving body 7 of the improving body are improved. Since the wall body of the body 5, the wall body of the radial improvement body 5, and the wall body of the plate-like improvement body 7 must be passed at four places, the water stopping effect is particularly large.

Further, in the present invention, it is not necessary to create an improved body for the entire amount of the target soil, and by making an improved body having a narrow width, the amount of the hardening agent such as cement milk used can be greatly reduced and the construction time can be shortened. Since it only takes about half, the cost will be reduced.
Further, according to the present invention, by making the radial arrangement fan-shaped joint improvement body, the improvement rate with respect to the total amount of the target soil can be easily controlled, and the fine design and construction according to the purpose can be performed.

[0049]

As described above, according to the present invention, an injection pipe having one or several injection ports is inserted into the ground, and a high-pressure jet of a hardening agent liquid or water containing a hardening agent is injected from the injection holes. In the method of constructing an improved body by pulling out at a predetermined speed while injecting in a predetermined direction, a ground improvement method was adopted in which the shape of the improved body was a predetermined or arbitrary radial shape by pulling out or inserting an injection pipe. Therefore, as a new ground improvement technique, the shape of the improved body can be set to a predetermined or arbitrary radial shape.

Further, according to the present invention, an injection pipe having one or several injection ports is inserted into the ground, and a high-pressure jet of a hardening agent liquid or water containing a hardening agent is injected in a predetermined direction from this injection port. However, in the construction method for constructing the improved body by pulling out at a predetermined speed, the operation of stopping the injection port at an arbitrary or predetermined position and injecting for a predetermined time, and the operation of rotationally moving the injection pipe to an arbitrary or predetermined position By repeating the above, the ground improvement method is performed in which the ground is strengthened by performing radial injection, so that it is possible to provide a regular or irregular branched improvement body.

Furthermore, in the present invention, an injection pipe having one or several injection ports is inserted into the ground, and a high-pressure jet of a hardening agent liquid or water containing a hardening agent is injected in a predetermined direction from this injection port. However, in the method of constructing the improved body by pulling out at a predetermined speed, the operation of stopping the injection port at an arbitrary or predetermined position and injecting for a predetermined time and the operation of rotationally moving the injection pipe to the arbitrary or predetermined position are performed. After repeatedly constructing the radial improvement body of the first stage, after pulling out or inserting the injection pipe of a predetermined length and moving the position of the injection port, at the extension point of the radial improvement body of the first stage, the same as the first stage By performing the operation to create the second radial improvement body, the ground improvement method of creating a plate-shaped radial improvement body by repeating the operation of pulling out or inserting the injection pipe of a predetermined length a predetermined number of times, Board It can provide an improved body.

Furthermore, according to the present invention, an injection pipe having one or several injection ports is inserted into the ground, and a high-pressure jet of a hardening agent liquid or water containing a hardening agent is directed in a predetermined direction from the injection holes. In a method of creating an improved body by pulling out at a predetermined speed while jetting, a plate-shaped improved body is created by pulling out or inserting an injection pipe, and a plurality of plate-shaped improved bodies are arranged in a predetermined or arbitrary radial shape. By doing so, the ground improvement method is used as a plate-like radial improvement body, so that a plate-like improvement body can be provided.

Furthermore, in the present invention, an injection pipe having one or several injection ports is inserted into the ground, and a high-pressure jet of a hardening agent liquid or water containing a hardening agent is predetermined from the injection holes. In the construction method of constructing an improved body by pulling out at a predetermined speed while injecting in a direction, operation to stop the injection port at an arbitrary or predetermined position and inject for a predetermined time and rotationally move the injection pipe to an arbitrary or predetermined position Repeat the above operation to create the first-stage radial improvement body, and then pull out or insert the injection pipe of the specified length to move the position of the injection port, and then at the extension point of the first-stage radial improvement body, Perform the same operation as above to create the second radial improvement body,
By repeating the operation of pulling out or inserting the injection pipe of a predetermined length a predetermined number of times, a plate-shaped radial improvement body is created, and a plurality of the plate-shaped improvement bodies are connected by cross-linking or by connecting them to form a mesh-like improved area. Since the ground improvement method is used to form the accumulation improvement area having an arbitrary shape, it is possible to provide an improved body that is crossed and joined.

Further, according to the present invention, an injection pipe having one or several injection ports is inserted into the ground, and a high-pressure jet of a hardening agent liquid or water containing a hardening agent is injected in a predetermined direction from this injection port. However, in the method of constructing the improved body by pulling out at a predetermined speed, the operation of stopping the injection port at an arbitrary or predetermined position and injecting for a predetermined time and the operation of rotationally moving the injection pipe to the arbitrary or predetermined position are performed. After repeatedly constructing the radial improvement body of the first stage, after pulling out or inserting the injection pipe of a predetermined length and checking the position of the injection port, at the extension point of the radial improvement body of the first stage, the same as the first stage The plate-like radial improving body is formed by repeating the operation of forming the second-stage radial improving body and pulling out or inserting the injection pipe of a predetermined length a predetermined number of times, and cross-connecting or connecting the plate-like radial improving body. Release of Since the ground improvement method was used to create an accumulation improvement area of any shape, such as a mesh improvement area, by connecting multiple cross connection formations or connection formations within the same level as the strength of the conventional soil. The improved body can be crossed and connected to be integrated with the preceding improved body.

Furthermore, according to the present invention, an injection pipe having one or several injection ports is inserted into the ground, and a high-pressure jet of a hardening agent liquid or water containing a hardening agent is directed in a predetermined direction from this injection port. In the construction method of constructing the improved body by pulling out at a predetermined speed while injecting, the operation of stopping the injection port at an arbitrary or predetermined position and injecting for a predetermined time and the operation of rotationally moving the injection pipe to an arbitrary or predetermined position After moving the position of the injection port by pulling out or inserting the injection pipe of a predetermined length after repeating the above to create the radial improved body of the first stage,
At the extension point of the first radial improver, the same operation as the first step is performed to create the second radial improver, and the operation of pulling out or inserting the injection pipe of a predetermined length is repeated a predetermined number of times. While creating a radial improvement body,
Since a ground improvement method was adopted in which unimproved soil was incorporated into blocks by creating a partition improvement at a right angle or at an arbitrary angle with the plate improvement at a predetermined location during construction, accumulation of any shape was possible. An improved area can be provided.

Furthermore, in the present invention, an injection pipe having one or several injection ports is inserted into the ground, and a high-pressure jet of a hardening agent liquid or water containing a hardening agent is predetermined from the injection holes. In the construction method of constructing an improved body by pulling out at a predetermined speed while injecting in a direction, operation to stop the injection port at an arbitrary or predetermined position and inject for a predetermined time and rotationally move the injection pipe to an arbitrary or predetermined position Repeat the above operation to form the first-stage radial improvement body, then pull out or insert the injection pipe of a predetermined length to move the position of the injection port, and then form the first-stage radial improvement body After pulling out or inserting the length injection pipe and moving the position of the injection port,
At the extension point of the first radial improver, the same operation as the first step is performed to create the second radial improver, and the operation of pulling out or inserting the injection pipe of a predetermined length is repeated a predetermined number of times to form a plate shape. In addition to creating the radial improvement body of, the unmodified soil is incorporated into the block shape by creating a partitioning board-shaped improvement body at a right angle or an arbitrary angle with the plate-shaped improvement body at a predetermined position during the formation, Since the ground improvement method uses the block-shaped integrated improved body integrated with soil as the stress body, the improved body can be used as the stress body.

In the present invention, an injection pipe having one or several injection ports is inserted into the ground, and a high-pressure jet of a hardening agent liquid or water containing a hardening agent is jetted from the injection holes in a predetermined direction. In a method of constructing an improved body by pulling out at a predetermined speed, by rotating the injection port at an arbitrary angle or at a predetermined position, the sectional shape of the improved body is changed to an arbitrary or predetermined radial arrangement fan-shaped combined body. Since the ground improvement method is used, a radial arrangement fan-shaped combined body having an arbitrary or predetermined sectional shape can be formed.

Further, according to the present invention, an injection pipe having one or several injection ports is inserted into the ground, and a high-pressure jet of a hardening agent liquid or water containing a hardening agent is injected in a predetermined direction from this injection port. However, in the method of constructing the improved body by pulling out at a predetermined speed, by pulling out or inserting the injection port while rotating the injection port at an arbitrary or predetermined position and by an arbitrary angle, an arbitrary or predetermined radial arrangement fan-shaped combination improved body Since it is a ground improvement method for producing the above-mentioned method, an arbitrary or predetermined radial arrangement fan-shaped combination improvement body can be produced.

Further, in the present invention, an injection pipe having one or several injection ports is inserted into the ground, and a high-pressure jet of a hardening agent liquid or water containing a hardening agent is injected in a predetermined direction from this injection port. However, in the method of constructing the improved body by pulling out at a predetermined speed, by repeating the operation of rotating the injection port at an arbitrary angle or at an arbitrary angle and the operation of pulling out or inserting, an arbitrary or predetermined radial arrangement Since this is a ground improvement method for forming a fan-shaped joint improving body, an arbitrary or predetermined radial arrangement fan-shaped joint improving body can be formed.

Furthermore, in the present invention, an injection pipe having one or several injection ports is inserted into the ground, and a high-pressure jet of a hardening agent liquid or water containing the hardening agent is directed in a predetermined direction from this injection port. In the method of constructing the improved body by pulling it out at a predetermined speed while jetting, the injection port is rotated at an arbitrary angle or at a predetermined position to form the first radial arrangement fan-shaped combined body, and then the predetermined length is obtained. After pulling out or inserting the injection pipe and moving the position of the injection port, at the extension point of the first radial arrangement fan-shaped assembly, the same operation as the first step is performed to open the second radial arrangement fan-shaped assembly. Created
Since it is a ground improvement method that creates an arbitrary or predetermined radial arrangement fan-shaped joint improvement body by repeating the operation of pulling out or inserting the injection pipe of a predetermined length a predetermined number of times, an arbitrary or predetermined radial arrangement fan-shaped joint improvement body is created. Can be created.

Furthermore, according to the present invention, an injection pipe having one or several injection ports is inserted into the ground, and a high-pressure jet of a hardening agent liquid or water containing a hardening agent is predetermined from the injection holes. In the method of constructing an improved body by pulling out at a predetermined speed while jetting in a direction, the injection port is rotated at an arbitrary angle or at a predetermined position at an arbitrary angle, and then the first radial arrangement fan-shaped combined body is formed and then the predetermined arrangement is formed. After pulling out or inserting the length injection pipe and moving the position of the injection port, at the extension point of the first radial arrangement fan-shaped assembly, the same operation as the first step is performed to perform the second-stage radial arrangement fan-shaped combination. By repeating the operation of pulling out or inserting the injection pipe of a predetermined length a predetermined number of times to create an arbitrary or predetermined radial arrangement fan-shaped joint improving body, and connecting a plurality of the radial arrangement fan-shaped joint improving bodies. Or by linking reclamation, because it is ground improvement method to construct a integrated improvement zone of any shape such as reticulated improved range, you can construct a integrated improvement zone of any shape such as reticulated improved range.

Furthermore, according to the present invention, an injection pipe having one or several injection ports is inserted into the ground, and a high-pressure jet of a hardening agent liquid or water containing a hardening agent is predetermined from the injection holes. In the method of constructing an improved body by pulling out at a predetermined speed while ejecting in a direction, the injection port is rotated at an arbitrary angle or at a predetermined position to form the first radially arranged fan-shaped combined body, and then the predetermined structure is formed. After pulling out or inserting the injection pipe and moving the position of the injection port, at the extension point of the radial arrangement fan-shaped combination of the first stage, the same operation as the first stage is performed and the radial arrangement fan-shaped connection of the second stage is performed. The body is formed, and the operation of pulling out or inserting the injection pipe of a predetermined length is repeated a predetermined number of times to form an arbitrary or predetermined radial arrangement fan-shaped coupling improvement body, and at the predetermined place in the process of radiation, It is a ground improvement method that creates a radial layout fan-shaped improvement body and a partitioning board-shaped improvement body integrally by creating a partitioning board-shaped improvement body at a right angle or at an arbitrary angle with the layout fan-shaped connection improvement body. An improved body and a partitioning board-shaped improved body can be integrally formed.

Furthermore, according to the present invention, a means for inserting the injection pipe into the ground and a high-pressure jet of the hardening agent liquid or water containing the hardening agent are ejected from the injection port of the injection tube while being ejected in a predetermined direction. Since it is a ground improvement device which is composed of an inserting means and forms the shape of the improvement body in a predetermined or arbitrary radial shape, it is possible to provide a ground improvement device having a corresponding construction means.

[Brief description of drawings]

FIG. 1 is a side view of three injection pipes according to the present invention.

FIG. 2 is a side view of three injection pipes according to the present invention.

FIG. 3 is a perspective view of an injection pipe according to the present invention.

FIG. 4 is a perspective view of an injection pipe according to the present invention.

FIG. 5 is a cross-sectional view of the injection pipe of the present invention inserted in the ground.

FIG. 6 is a plan view of a state in which a six-direction radial improvement body of the present invention has been created.

FIG. 7 is a perspective view of a state in which a radial improvement body in 6 directions is formed by the injection pipe of the present invention.

FIG. 8 is a perspective view of a state in which a radial improvement body in 6 directions and a partition board are integrally connected to each other by the injection pipe of the present invention.

FIG. 9 is a perspective view showing a state in which a regular branch-shaped improvement body has been formed with the injection pipe of the present invention.

FIG. 10 is a perspective view showing a state where an irregular branch-like improvement body is formed by the injection pipe of the present invention.

FIG. 11 is a perspective view showing a state where a plate-shaped improvement body is formed by the injection pipe of the present invention.

FIG. 12 is a perspective view showing a state where a plate-shaped improvement body is formed by the injection pipe of the present invention.

FIG. 13 is a perspective view showing a state in which plate-shaped improvement bodies are cross-connected and formed by the injection pipe of the present invention.

FIG. 14 is a plan view of a state in which a plurality of four-direction radial improvement bodies of the present invention are cross-linked to form a quadrangular accumulation improvement area.

FIG. 15 is a plan view showing a state where the non-equidistant four-direction radial improvement body of the present invention is constructed.

FIG. 16 is a plan view showing a state in which a plurality of non-equidistant four-direction radial improving bodies of the present invention are connected to each other in one direction and plate-like improving bodies are formed on both sides thereof to form a net-like improved area. .

FIG. 17 is a plan view showing a state in which a multi-direction radial improvement body of the present invention is irregularly cross-connected and a mesh-like improvement region is formed.

FIG. 18 is a perspective view showing a state in which a plurality of improved bodies in which a four-way radial improved body and a partition board are integrally formed by the injection pipe of the present invention are cross-connected.

FIG. 19 is a plan view showing a state where a radially arranged fan-shaped combined body having a cross-sectional shape of 6 directions according to the present invention is formed.

FIG. 20 is a plan view showing a state where a radially arranged fan-shaped combined body having a cross-sectional shape of 6 directions according to the present invention is formed.

FIG. 21 is a perspective view of a state in which a six-direction radial arrangement fan-shaped coupling improving body of the present invention is constructed.

FIG. 22 is a plan view of a state in which a plurality of quadrilateral radial arrangement fan-shaped joint improving bodies of the present invention are cross-linked to form a quadrangular accumulation improving area.

FIG. 23 is a perspective view showing a state in which a radial arrangement fan-shaped connection improving body in four directions and a partition board are integrally formed in the injection pipe of the present invention.

FIG. 24 is a perspective view showing a state in which a plurality of improved bodies in which a four-way radial improved body and a partition board are integrally formed by the injection pipe of the present invention are cross-connected from the horizontal direction.

[Explanation of symbols]

1 ... Injection pipe 2 ... Injection port 3 ... Target ground 4 ... Boring machine 5 ... Radial improvement 6 ... Improved partitioning board 7 ... Improved plate 8 ... Radially arranged fan-shaped combined body 9 ... Radially arranged fan-shaped improvement body 11 ... Ultrasonic sensor for measuring slurry distance 12 ... Regular branched improvement 13 ... Irregular branched improvement

Continued front page    F-term (reference) 2D040 AB03 BA01 BD02 BD03 CB03                       DA12 DA13 DA17 FA02 FA03                       FA04

Claims (15)

[Claims] 1. An injection pipe having one or several injection ports is inserted into the ground, and a high-pressure jet of a hardening agent liquid or water containing a hardening agent is injected from the injection holes in a predetermined direction at a predetermined speed. In the construction method for constructing an improved body by pulling out with, the ground improvement construction method in which the shape of the improved body is set to a predetermined or arbitrary radial shape by pulling out or inserting the injection pipe. 2. An injection pipe having one or several injection ports is inserted into the ground, and a high-pressure jet of a hardening agent liquid or water containing the hardening agent is injected from this injection port in a predetermined direction at a predetermined speed. In the construction method of constructing the improved body by pulling out by, by repeating the operation of stopping the injection port at an arbitrary or predetermined position and injecting for a predetermined time, and the operation of rotationally moving the injection pipe to an arbitrary or predetermined position. A ground improvement method that strengthens the ground by performing radial injection. 3. An injection pipe having one or several injection ports is inserted into the ground, and a high-pressure jet of a hardening agent liquid or water containing a hardening agent is ejected from this injection port in a predetermined direction at a predetermined speed. In the construction method of constructing the improved body by pulling out with, the operation of stopping the injection port at an arbitrary or predetermined position and injecting for a predetermined time and the operation of rotationally moving the injection pipe to an arbitrary or predetermined position are repeated. After constructing the radial improvement body, after pulling out or inserting the injection pipe of a predetermined length and moving the position of the injection port, perform the same operation as the first stage at the extension point of the first radial improvement body. A ground improvement method in which a plate-shaped radial improvement body is formed by repeating the operation of forming a second-stage radial improvement body and pulling out or inserting an injection pipe of a predetermined length a predetermined number of times. 4. An injection pipe having one or several injection ports is inserted into the ground, and a high-pressure jet of a hardening agent liquid or water containing a hardening agent is injected from the injection holes in a predetermined direction at a predetermined speed. In the method of creating an improved body by pulling out with, a plate-shaped improved body is created by pulling out or inserting the injection pipe, and a plurality of plate-shaped improved bodies are arranged in a predetermined or arbitrary radial shape. Ground improvement method with radial improvement body. 5. An injection pipe having one or several injection ports is inserted into the ground, and a high-pressure jet of a hardening agent liquid or water containing a hardening agent is injected from this injection port in a predetermined direction at a predetermined speed. In the construction method of constructing the improved body by pulling out with, the operation of stopping the injection port at an arbitrary or predetermined position and injecting for a predetermined time and the operation of rotationally moving the injection pipe to an arbitrary or predetermined position are repeated. After constructing the radial improvement body, after pulling out or inserting the injection pipe of a predetermined length and moving the position of the injection port, perform the same operation as the first stage at the extension point of the first radial improvement body. A plate-shaped radial improvement body is created by forming a second-stage radial improvement body and repeating the operation of pulling out or inserting the injection pipe of a predetermined length a predetermined number of times, and a plurality of plate-like improvement bodies are connected to each other by cross-linking. Or connection A ground improvement method that creates an accumulation improvement area of any shape, such as a mesh improvement area. 6. An injection pipe having one or several injection ports is inserted into the ground, and a high-pressure jet of a hardening agent liquid or water containing a hardening agent is injected from this injection port in a predetermined direction at a predetermined speed. In the construction method of constructing the improved body by pulling out with, the operation of stopping the injection port at an arbitrary or predetermined position and injecting for a predetermined time and the operation of rotationally moving the injection pipe to an arbitrary or predetermined position are repeated. After confirming the position of the injection port by pulling out or inserting the injection pipe of the specified length after creating the radial improvement body of, perform the same operation as the first step at the extension point of the radial improvement body of the first step. A plate-shaped radial improvement body is formed by forming a second-stage radial improvement body and repeating the operation of pulling out or inserting the injection pipe of a predetermined length a predetermined number of times, and cross-connecting or connecting the plate-like radial improvement body. Strength of Is a ground improvement method in which a plurality of connection improvement areas of any shape, such as a mesh improvement area, are created by connecting or constructing a plurality of connections within the same level as the strength of conventional soil. 7. An injection pipe having one or several injection ports is inserted into the ground, and a high-pressure jet of a hardening agent liquid or water containing a hardening agent is ejected from this injection port in a predetermined direction at a predetermined speed. In the construction method of constructing the improved body by pulling out with, the operation of stopping the injection port at an arbitrary or predetermined position and injecting for a predetermined time and the operation of rotationally moving the injection pipe to an arbitrary or predetermined position are repeated. After constructing the radial improvement body, after pulling out or inserting the injection pipe of a predetermined length and moving the position of the injection port, perform the same operation as the first stage at the extension point of the first radial improvement body. A plate-shaped radial improvement body is formed by repeating the operation of forming the second-stage radial improvement body and pulling out or inserting the injection pipe of a predetermined length a predetermined number of times, and at the predetermined place in the process of forming the plate-like radial improvement body. body A ground improvement method in which unmodified soil is incorporated into blocks to create an integrated improvement area of any shape by creating a partitioning board at a right angle or at any angle. 8. An injection pipe having one or several injection ports is inserted into the ground, and a high-pressure jet of a hardening agent liquid or water containing a hardening agent is injected from this injection port in a predetermined direction at a predetermined speed. In the construction method of constructing the improved body by pulling out with, the operation of stopping the injection port at an arbitrary or predetermined position and injecting for a predetermined time and the operation of rotationally moving the injection pipe to an arbitrary or predetermined position are repeated. After constructing the radial improvement body, after pulling out or inserting the injection pipe of a predetermined length and moving the position of the injection port, perform the same operation as the first stage at the extension point of the first radial improvement body. A plate-shaped radial improvement body is formed by repeating the operation of forming the second-stage radial improvement body and pulling out or inserting the injection pipe of a predetermined length a predetermined number of times, and at the predetermined location in the process of forming, the plate-shaped improvement body When A soil improvement method in which unmodified soil is incorporated into blocks by creating a partitioning machine at a right angle or at an arbitrary angle, and a block-shaped integrated improved body integrated with unmodified soil is used as a stress body. 9. An injection pipe having one or several injection ports is inserted into the ground, and a high-pressure jet of a hardening agent liquid or water containing a hardening agent is injected from this injection port in a predetermined direction at a predetermined speed. In the method of constructing an improved body by pulling out with, the improvement of the ground by changing the cross-sectional shape of the improved body into a radial arrangement fan-shaped combined body by rotating the injection port at an arbitrary angle or at a predetermined position. Construction method. 10. An injection pipe having one or several injection ports is inserted into the ground, and a high speed jet of a hardening agent liquid or water containing a hardening agent is injected from this injection port in a predetermined direction at a predetermined speed. In the construction method to create an improved body by pulling out with, by pulling out or inserting while rotating the injection port at any angle at an arbitrary or predetermined position,
A ground improvement method for forming an arbitrary or predetermined radial arrangement fan-shaped improved joint. 11. An injection pipe having one or several injection ports is inserted into the ground, and a high-pressure jet of a hardening agent liquid or water containing a hardening agent is ejected from this injection port in a predetermined direction at a predetermined speed. In the construction method of constructing an improved body by pulling out with, by repeating the operation of rotating the injection port at an arbitrary angle or an arbitrary angle and the operation of withdrawing or inserting, an arbitrary or predetermined radial arrangement fan-shaped coupling improved body Ground improvement method to create 12. An injection pipe having one or several injection ports is inserted into the ground, and a high-pressure jet of a hardening agent liquid or water containing a hardening agent is injected from this injection port in a predetermined direction at a predetermined speed. In the method of constructing the improved body by pulling out with, the injection port is rotated at an arbitrary angle or at a predetermined position at an arbitrary angle to form the first-stage radially arranged fan-shaped combined body, and then the injection pipe of a predetermined length is pulled out. After inserting or moving the position of the injection port, at the extension point of the radially arranged fan-shaped combined body of the first stage, the same operation as that of the first stage is performed to form the radially arranged fan-shaped combined body of the second stage, and A ground improvement method for forming an arbitrary or predetermined radial arrangement fan-shaped improved joint by repeating the operation of pulling out or inserting the length injection pipe a predetermined number of times. 13. An injection pipe having one or several injection ports is inserted into the ground, and a high-pressure jet of a hardening agent liquid or water containing the hardening agent is injected from this injection port in a predetermined direction at a predetermined speed. In the method of constructing the improved body by pulling out with, the injection port is rotated at an arbitrary angle or at a predetermined position at an arbitrary angle to form the first-stage radial arrangement fan-shaped combined body, and then the injection pipe is pulled out for a predetermined length. After inserting and moving the position of the injection port, at the extension point of the first-stage radial arrangement fan-shaped assembly, the same operation as the first step is performed to form the second-stage radial arrangement fan-shaped combination body, and the predetermined length By repeating the operation of pulling out or inserting the injection pipe a predetermined number of times, an arbitrary or predetermined radial arrangement fan-shaped joint improving body is formed, and a plurality of the radial arrangement fan-shaped joint improving bodies are cross-linked or connected. A ground improvement method that creates an accumulation improvement area of any shape, such as a mesh improvement area. 14. An injection pipe having one or several injection ports is inserted into the ground, and a high speed jet of a hardening agent liquid or water containing a hardening agent is injected from this injection port in a predetermined direction at a predetermined speed. In the method of constructing the improved body by pulling out with, the injection port is rotated at an arbitrary angle or at a predetermined position at an arbitrary angle to form the first-stage radially arranged fan-shaped combined body, and then the injection pipe of a predetermined length is pulled out. After inserting or moving the position of the injection port, at the extension point of the radially arranged fan-shaped combined body of the first stage, the same operation as that of the first stage is performed to form the radially arranged fan-shaped combined body of the second stage, and By repeating the operation of pulling out or inserting the length injection pipe a predetermined number of times, an arbitrary or predetermined radial arrangement fan-shaped joint improving body is formed, and at a predetermined position in the process of construction, the radial arrangement fan-shaped joint improving body is directly connected to the radial arrangement fan-shaped joint improving body. A ground improvement method in which a partition-like improved body is integrally formed with a radially arranged fan-shaped improved joint by forming the partition-like improved body at an angle or at an arbitrary angle. 15. A means for inserting the injection pipe into the ground, and a means for pulling up or inserting the high-pressure jet of the hardening agent liquid or water containing the hardening agent in a predetermined direction from the injection port of the injection tube. A ground improvement device for forming a shape of an improved body in a predetermined or arbitrary radial shape,
2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12,
A ground improvement device equipped with a construction means corresponding to 13 or 14.