JP3974600B2 - How to install a vibration isolation wall - Google Patents

Description

  TECHNICAL FIELD The present invention relates to an installation method for installing a vibration isolation wall for isolating vibration with a seismic source such as a train, an automobile, and a machine foundation in a narrow area such as a general ground or a viaduct.

  2. Description of the Related Art Conventionally, a method for installing a vibration isolation wall using a plate-like member such as a steel sheet pile or a concrete wall as a main member is known. Vibration isolation walls using steel sheet piles and concrete walls are strong and safe due to the nature of their materials, but their vibration isolation effect is not sufficient. According to such an installation method, a large construction machine for burying a steel sheet pile or a concrete wall is required. (For example, refer to Patent Document 1).

  Further, according to another method of installing the vibration isolation wall, there is an empty groove defined by a steel sheet pile or the like press-fitted so as to face each other. The vibration isolation wall installed by such an installation method has a higher vibration isolation effect than a case where there is no air groove, but there are still problems in safety and earthquake resistance.

In addition, there is known a method of installing a vibration isolation wall by burying a vibration isolation member created by connecting a plurality of tubes (cushion bodies) filled with gas inside and embedded in the ground. Although the vibration isolation wall by the cushion body has high vibration isolation performance, a vertical hole for embedding the vibration isolation member in advance by a large construction machine such as a clam shell was excavated, and a concrete weight was attached to this vertical hole A vibration isolation member is embedded and fixed.
Japanese Patent Publication No. 2001-226998

  However, in the installation method using the cushion body, it is necessary to excavate a vertical hole having a necessary depth in advance using a large construction machine, and it is difficult to perform construction in a low-altitude place such as a narrow space. There was a problem of being. Moreover, in this installation method, the means to prevent the displacement of the original ground during construction and after completion of construction was not provided. In addition, it is necessary to attach a weight for preventing the cushion body from rising due to the buoyancy generated in the cushion body at the lower end in the insertion direction of the cushion body, and there is a problem that the enforcement method is troublesome. Furthermore, since the ground improvement process for inserting the cushion body and the process for inserting the cushion body are separate processes, there is also a problem that the construction time becomes long.

  Therefore, an object of the present invention is to provide a method for efficiently installing a vibration isolation wall having a high strength and vibration isolation performance in a general land or a narrow area.

In order to solve the above-described object, a vibration isolation wall installation method according to the present invention includes a step of excavating a raw ground for constructing a vibration isolation wall, and the excavated original ground is attached to a construction machine in advance. A step of forming a retaining wall by press-fitting a plurality of press-fitting materials by a press-fitting material press-fitting plate device, and a solution for soiling previously attached to the construction machine between the retaining wall and the excavated raw ground a step of soil by injector, inserting a vibration isolating member for vibration absorption by the soil of solution injection device into the soil of the ground, after the step of inserting the vibration isolation member, is inserted and attaching a floating prevention fitting for preventing the vibration isolation member is floated, a process removing the floating prevention fitting after the soil of the ground is hardened, formed Ri from the soil retaining A step of providing, said soil step, a step of inserting the vibration isolation member and said Rukoto performed by the same construction machine.

  According to the installation method of the vibration isolation wall of the present invention, since a single construction machine can be used to soil the original ground and a vibration isolation member can be inserted, the construction space such as under an elevated route is limited. Even in a confined space, there is an advantage that a vibration isolation wall having high vibration isolation can be installed. Moreover, since the displacement of the original ground can be prevented during the construction and after the completion of the construction, it has high safety. In addition, since the original ground is made into a soil using a curable solution and the vibration isolating member is press-fitted, a lifting-preventing weight is not required. In addition, since the vibration isolating member can be inserted while the original ground is made into a soil, the construction time can be shortened.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a perspective view showing a midway of construction of a vibration isolation wall installation method according to the present invention. More specifically, a retaining wall W formed by press-fitting a press-fitting material 3 made of a steel sheet pile or the like into a cloth moat T with a construction machine equipped with a press-fitting material press-fitting and drawing device (not shown), and a multi-axis swing jet to be described later The vibration isolating member 5 inserted into the soiled portion S formed by making the original ground between the earth retaining wall W and the cloth moat T into a soil by the construction machine equipped with the apparatus, and the soiled portion S are cured. Until this time, the metal fittings 10 and 10A for preventing the vibration isolation member 5 from being lifted by buoyancy are shown.

  When starting construction, the base ground is excavated by a predetermined width D to provide the cloth moat T, and the width D of the cloth moat T is sufficient with a smaller excavation amount than before.

  FIG. 2 is a view showing the multi-axis oscillating injection device 200 in a state where the vibration isolation member 5 constituting the main part of the vibration isolation wall is attached.

  The multi-axis oscillating spray device 200 is a device for forming the soil forming portion S and inserting the vibration isolating member 5 and is detachably fixed to a main body of a construction machine (not shown). When the earth retaining wall W is formed on the main body of the construction machine (not shown), a press-fitting material press-fitting device (not shown) is attached, and a retaining wall (partition plate) W that partitions the original ground by the press-fitting material press-fitting device. Is formed. After the earth retaining wall W is formed, the multi-axis oscillating spray device 200 shown in FIG. 2 is attached to the main body of the construction machine, and each construction process described later is performed. In this way, by attaching an attachment (for example, a press-fitting material press-fitting / drawing device, a multi-axis swing injection device 200, etc.) that matches the purpose to the main body of the same construction machine, it is efficient not only in general land but also in narrow space, And it can be constructed economically.

  As shown in FIG. 2, the multi-axis oscillating injection device 200 is attached to the main-axis oscillating injection device main body 20 and the elevating means composed of hydraulic pressure, a chain 30 and the like so as to be movable up and down. A pair of multi-axis oscillating shafts 27 and 27 is generally configured. The tip of the multi-axis oscillating shaft 27 is provided with an injection port 21 for high-pressure injection of a soiling solution for making the original ground into a soil. The solution for soiling can be sprayed in the range of AR3 and AR4 at the center (see FIG. 3).

  As shown in FIG. 3, since the pair of injection ports 21 are provided at positions opposite to each other on a substantially diagonal line, the base ground and the solution for soiling can be mixed efficiently. Moreover, since the connection part 28 and the injection port 21 are raised / lowered together by raising / lowering of the chain 30, a vertical hole is gradually formed to the predetermined depth while making the original ground into a soil.

  Further, the pair of multi-axis oscillating shafts 27 and 27 are slidably held by a cylindrical holding portion 25, and the pair of holding portions 25 and 25 are reinforced by a connecting portion 26.

  Referring to FIG. 2, the vibration isolating member 5 includes a columnar first support member 82 that supports the longitudinal direction of the vibration isolating member 5, and a bottom portion of the vibration isolating member 5 that is connected to the first support member 82. Is attached to the connecting portion 26 of the multi-axis oscillating spray device 200 by the second support member 81 that supports the shaft. Specifically, the engaging portion 82 a of the first support member 82 is attached to one end of the elevating member 83 inserted through the attaching portion 24 that is attached to the connecting portion 26 of the multi-axis oscillating injection device 200 so as to be raised and lowered. It is fixed to the chuck 29. Further, as shown in FIG. 2, the support members 81 and 82 are formed in a substantially T-shape.

  In the present embodiment, the vibration isolation member 5 is formed by connecting a plurality of cushion bodies filled with gas inside the flexible container.

  The vibration isolating member 5 can be moved up and down independently of the lifting and lowering of the multi-axis swing shaft 27 of the multi-axis swing injection device 200 by the lifting means including the chain 30 and a hydraulic device (not shown). It is also possible to move up and down with the same amount of movement in parallel with the multi-axis oscillating spray shaft 27. Due to such a structure, the vibration isolation supported by the support members 81 and 82 in the soil forming part S is performed while high-pressure injection of the soil forming solution from the injection port 21 of the multi-axis oscillating spray shaft 27 to make the original ground soil. The member 5 can be inserted. As described above, since the soiling and the insertion of the vibration isolating member 5 can be performed simultaneously by the same construction apparatus, the construction time can be shortened as compared with the prior art.

  4 and 6 are an explanatory diagram and a flowchart for explaining a construction method using the construction apparatus described above.

As shown in FIGS. 4 and 6, a press-fitting material press-fitting / drawing device and a multi-axis rocking jet device (soil forming solution jetting device) 200 are attached in advance to a construction machine main body ( not shown ). The press-fitting material (steel sheet pile) 3 is press-fitted (placed) at a predetermined location by using it to form the earth retaining wall W (FIG. 4 (a), step 1). In addition, in this embodiment, in order to form the earth retaining wall W, the example which used the some steel sheet pile 3 was shown, However, As a press-fit material, a concrete board etc. may be sufficient.

Between the earth retaining wall W and the excavated raw ground, the first soil forming part S1 is formed by using the multi-axis oscillating injection device 200 of the main body of the construction machine to which the vibration isolating member 5 is attached ( FIG. 4B, step 2). Note that the dotted line in FIG.

  The retaining wall W prevents the displacement of the original ground due to the soiling, and supports the load when the construction machine (not shown) and the multi-axis swing injection device 200 move on the retaining wall W. Yes. Specifically, the second press-fitting material has a function in which the first press-fitting material that is press-fitted to the vicinity of the support layer of the original ground has a function of preventing displacement and supporting the weight of the construction machine, and is shorter and less expensive than the first press-fitting material. Has mainly the function of preventing displacement. In this way, by using the two types of press-fitting material 3 of the long and short, it is possible to install a vibration isolating wall that is economical and safe.

Next, the vibration isolating member 5 is inserted into the soil forming part S1 by using the multi-axis swing injection device 200 of the main body of the construction machine (FIG. 4 (c), step 3). Since Step 2 and Step 3 are performed by the same construction machine as described above , Step 2 and Step 3 may be performed simultaneously. In this case, the construction time can be further reduced.

  Next, the construction machine (not shown) is moved, and the above steps 2 and 3 are repeated a desired number of times (FIG. 4 (d) shows a state in which the second soil forming part S2 is formed).

  When a plurality of vibration isolation members 5 are inserted, adjacent vibration isolation members 5 are arranged to overlap each other in order to prevent vibration from propagating from between the vibration isolation members 5 (FIG. 4 ( e)). What is necessary is just to adjust the length X of the overlap part O suitably.

Incidentally, with to arrange the vibration isolation member 5 schematically horizontally alternately back and forth relative to the earth retaining wall W, it can prevent the vibrations by arranging while overlapping the vibration isolating member 5 adjacent leakage, the simplest From the viewpoint of overlapping by a simple method, it is preferable to insert the vibration isolating member 5 in a state inclined by a predetermined angle with respect to the earth retaining wall W as shown in FIG. .

  Next, the anti-lifting metal fitting 10 is attached to the engaging portion 82a of the first support member 82 that supports the inserted vibration isolating member 5 (FIG. 4 (e), step 4). The levitation preventing metal fitting 10 has a pair of arms 10A that are fixed to the support member 82 by screws or the like (not shown) and press the upper portion of the vibration isolating member 5. The arm 10A is in contact with the upper end surface of the gas cushion 5, and the end of the arm 10A is welded to the earth retaining wall W by the welded portion 100 as shown in FIG. It is prevented from rising. As a method for fixing the anti-lifting metal fitting 10 to the earth retaining wall W, a pair of arms 10A is provided so as to be rotatable with respect to the anti-lifting metal fitting 10, and an engaging portion is provided at the tip of the arm 10A. The engaging wall and the detachable engaged portion may be provided on the earth retaining wall W. Further, a connecting portion for preventing the pair of arms 10A and 10A from rotating until the soil forming portion S is cured is provided, and the connecting portion is fixed to each arm 10A with a pin or the like, If the engaging part is connected with a pin or the like, the vibration blocking member 5 can be prevented from rising more reliably.

  Finally, when the soil forming part S (S1, S2) is cured and the continuous wall C is formed (step 5), the anti-lifting metal fitting 10 and the arm 10A are removed to complete the construction (FIG. 4 (f)). Step 6).

  FIG. 5 is a perspective view showing a state after the completion of construction. As understood from FIG. 5, the soil that has been soiled is hardened to form a continuous wall C, and the vibration isolation member 5 is embedded in the continuous wall C.

  As will be understood from the above, since the vibration isolating member is inserted while making the soil, the depth of the cloth moat T excavated at the start of construction is also a depth corresponding to the length of the vibration isolating member in advance as in the past. There is no need to dig. For this reason, according to the method for installing the vibration isolation wall according to the present invention, a large excavation construction machine is not required as in the prior art. Can be installed. Further, according to the present invention, it is possible to install the vibration isolating member without requiring a weight for preventing ascent.

  Furthermore, since the earth retaining wall that also functions as a moving place of the construction machine functions as a displacement prevention means, a vibration isolation wall having not only strength but also safety can be obtained. In the present invention, the curability is imparted by adding cement or the like to the solution for soiling for soiling. However, if it is not always necessary to impart curability, water is simply added at high pressure. You may spray. That is, what is necessary is just to determine the composition of the solution for soiling according to the composition of a raw ground.

  Moreover, although the enforcement method in the narrow area was described in the said embodiment, the construction method concerning this invention is not restricted to a narrow area, It can be enforced also in a general ground, The vibration isolation performance similar to a general ground is also demonstrated. The provided vibration isolation wall can be installed.

  In addition to general land, a vibration isolation wall having high vibration isolation performance can be installed in confined areas such as under an overhead bridge where it is difficult to carry in a large construction machine.

It is explanatory drawing which shows the place which has installed the vibration isolation wall which concerns on this invention. It is a front view of the multi-axis rocking | fluctuation injection apparatus with which the vibration interruption member was attached. FIG. 3 is a partially enlarged view of the multi-axis oscillating spray device shown in FIG. 2. It is a schematic diagram which shows the installation method of the vibration isolation wall which concerns on this invention. It is a perspective view which shows the vibration isolation wall after completion | finish of construction. It is a flowchart which shows the installation method of the vibration isolation wall which concerns on this invention.

Explanation of symbols

3 Press-fitting material 5 Vibration blocking member 10 Lifting prevention metal fitting 10A Arm 82 Second support member 82a Engaging part 100 Welding part S Soiling part C Continuous wall T Fabric moat part W Earth retaining wall

Claims (5)

A method of installing a vibration isolation wall,
The process of excavating the original ground;
Forming a retaining wall by press-fitting a plurality of press-fitting materials by a press-fitting material press-fitting plate device attached in advance to a construction machine to the excavated raw ground;
Forming a soiled portion by a solution spraying device for soiling that is pre-attached to the construction machine between the earth retaining wall and the excavated raw ground;
Inserting a vibration isolating member into the soiled ground by the solution injection device for soiling ;
After the step of inserting the vibration blocking member, a step of attaching a rising prevention metal fitting for preventing the inserted vibration blocking member from floating,
Removing the anti-lift metal fitting after the soiled portion is cured;
Formed Ri from the steps of providing the soil retaining walls, and the soil of step installation method of vibration isolation wall comprising the steps of inserting the vibration isolation member, wherein Rukoto performed by the same construction machine.   2. The method of installing a vibration isolation wall according to claim 1, wherein the vibration isolation member is inserted into the soiled portion in a state inclined by a desired angle with respect to the longitudinal direction of the retaining wall. How to install a vibration isolation wall. A method of installing the vibration blocking wall according to claim 1, the vibration isolating member by using at least two or more, and at least a part of the vibration isolation member adjacent are arranged to overlap each other How to install a vibration isolation wall.   2. The method of installing a vibration isolation wall according to claim 1, wherein the soiling step and the step of inserting the vibration isolation member into the soiling portion are performed simultaneously. .   2. The method of installing a vibration isolation wall according to claim 1, wherein the soiling step further includes a step of high-pressure injection of a solution for soiling into the excavated raw ground. Method.

Images