JP2533701B2 - How to build the structure of the isolation wall - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of constructing a structure of a vibration isolation wall for suppressing the propagation of ground vibration.

[0002]

2. Description of the Related Art Traffic vibration generated on railways, roads, etc.
It is a type of pollution and its prevention is required. As measures for preventing vibration pollution caused by traffic vibration, there are suppression of the occurrence of traffic vibration itself, suppression of the propagation path of traffic vibration, and measures against vibration on the side receiving the traffic vibration. It is known that, in order to suppress the above-mentioned traffic vibration on the propagation path, it is effective to form a vibration isolation groove having a depth of about 10 to 20 m in the ground along the propagation path.

[0003] However, the above-mentioned grooves are liable to collapse due to the earth pressure and water pressure of the ground, and the grooves cannot be held for a long period of time.

Therefore, in order to maintain the above-mentioned vibration isolation groove stably over a long period of time, the following two vibration isolation wall structures have been conventionally proposed.

(I) A vibration isolating wall structure in which the vibration isolating groove is filled with highly rigid concrete.

(Ii) A structure of a vibration isolating wall in which both sides of the vibration isolating groove are solidified with concrete, leaving an empty portion of the groove.

[0007]

However, each of the above-described two conventional vibration isolating wall structures has the following drawbacks.

In the structure of the vibration isolating wall of the above (i), since the grooves are filled with concrete, the vibration of the ground is easily transmitted through the concrete and passes through the grooves, and the vibration suppressing effect of the grooves is reduced. Be impaired.

In the structure of the vibration isolating wall of the above (ii), since the inside of the concrete in which both sides of the groove are hardened is an empty groove, the vibration suppressing effect of the groove is not impaired and an ideal vibration suppressing effect is obtained. be able to. However, in order to build the above structure, it is necessary to solidify both sides of the vibration isolating groove with concrete, so that the cost of building the above structure becomes high.

Therefore, an object of the present invention is to provide a method of constructing an inexpensive vibration-insulating wall structure capable of stably holding the groove without damaging the vibration suppressing effect of the groove for vibration isolation. is there.

[0011]

In order to achieve the above object, in the method of constructing a structure of a vibration isolating wall according to claim 1 of the present invention, a rigid plate sandwiching a bag-shaped sheet is placed in the ground. After that, the step of pulling out the rigid plate from the ground while injecting a liquid or gel-like substance into the bag-like sheet is repeated at positions adjacent to each other, and the bag-like sheet in which the liquid or gel-like substance is injected is repeated. Is substantially continuous in the lateral direction.

According to a second aspect of the present invention, in the method of constructing the structure of the vibration isolating wall, a guide pile is driven into the ground, and a rigid plate sandwiching a bag-shaped sheet is provided along the guide pile. It is characterized in that it is cast on the ground, and the rigid plate is pulled out from the ground while injecting a liquid or gel-like substance into the bag-shaped sheet.

[0013]

According to the method of constructing the structure of the vibration isolating wall of claim 1, a rigid plate sandwiching a bag-shaped sheet is placed on the ground, and then a liquid or gel-like substance is placed in the bag-shaped sheet. The rigid plate is pulled out from the ground while injecting. Therefore, the formation of the vibration isolation groove and the disposition of the bag-shaped sheet in the groove are simultaneously performed, and the construction efficiency of the structure of the vibration isolation wall is improved.

According to the method of constructing the structure of the vibration isolating wall of the second aspect, since the rigid plate sandwiching the bag-like sheet is driven along the guide pile driven on the ground, the driving is performed on the ground. At the time of installation, the rigid plate is guided by the guide pile to facilitate the work of placing the rigid plate. Then, after the rigid plate is cast, the rigid plate is pulled out from the ground while injecting a liquid or gel-like substance into the bag-shaped sheet. Therefore, the formation of the vibration isolation groove and the placement of the bag-shaped sheet into which the liquid or gel-like substance is injected are simultaneously performed, and the efficiency of constructing the structure of the vibration isolation wall is improved. Further, since the guide pile exists at the end portion of the bag-shaped sheet, the guide pile has the bag-shaped shape when another vibration-isolating groove adjacent to the vibration-isolating groove is formed next. Protects the edges of the sheet and prevents the bag-like sheet from being damaged.

[0015]

The present invention will be described in detail below with reference to the embodiments shown in the drawings.

FIG. 1 shows an example of the structure of the vibration isolation wall. In this example, a rubber bag-like sheet 5 filled with muddy water 3 is arranged in a vibration isolation groove 2 formed in the ground 1 in the propagation path of traffic vibration. The water level of the muddy water 3 is slightly higher than the surface of the ground 1. The groove 2 may have a depth of about 10 m and a width of about several cm. As shown in FIG. 2 which is a plan view of the structure, a plurality of the bag-shaped sheets 5 are provided in the grooves 2. The plurality of bag-shaped sheets 5 are arranged side by side in the lateral direction, and the ends 5a of the sheets 5 overlap each other.

According to the structure of the vibration isolating wall, the inexpensive rubber bag-like sheet 5 in which the muddy water 3 is injected supports the earth pressure and water pressure of the ground 1 applied to the groove 2 and holds the groove 2. it can. When the vibration of the ground 1 reaches the groove 2, the longitudinal wave (P wave) of the vibration propagates at the place of the bag-like sheet 5 into which the muddy water 3 is injected, but the vibration of the vibration Shear waves and surface waves, which are transverse waves (S-waves), which are the main causes of damage to buildings, can be blocked. Therefore, according to the structure of the vibration isolating wall, as shown in FIG. 3, it is possible to manage the water level of the muddy water 3 on a daily basis without impairing the vibration suppressing effect of the vibration isolating groove 2. The groove 2 can be stably held at low cost.

Next, an embodiment of the method of constructing the structure of the vibration isolating wall according to the present invention will be described with reference to FIGS. 4 and 5.

First, the grip portion 26 of the vibrator is fitted to the upper end of the driving jig 28 which is a rigid plate sandwiching the bag-shaped sheet 25 shown in FIG. Then, while transmitting the vibration from the vibrator to the driving jig 28 via the grip portion 26, the driving jig 28 is moved to the ground 2 as shown in FIG.
I will set it in 1.

Next, as shown in FIG. 4 (ii), the driving jig 28 is driven into the ground 21 for about 10 m, and when the setting of the driving jig 28 is completed, as shown in FIG. 5 (d). A conical upstanding member 27 (not shown in FIG. 4) fixed to the lower end of the bag-shaped sheet 25 shown in the figure is embedded in the bottom of the vibration isolation groove formed by the driving tool 28. It will be in a state of being broken.

In this way, it is possible to simultaneously form the groove for vibration isolation and dispose the bag-shaped sheet 25 in the groove, and the structure of the vibration isolating wall completed in the following steps is completed. The building efficiency can be improved. After that, as shown in FIG.
As shown in v) and (v), the driving jig 28 is pulled out from the ground 21 while pouring the muddy water 23 into the bag-shaped sheet 25. The co-climbing prevention material 27 embedded in the bottom of the groove can prevent the bag-shaped sheet 25 from co-climbing with the driving jig 28 when the driving jig 28 is pulled out.

By repeating the above steps for the ground adjacent to the groove, as shown in FIG. 6, the bag-like sheet 25 into which the muddy water 23 has been injected is continuously continuous in the lateral direction. You can

Next, an embodiment of the method of constructing the structure of the vibration isolating wall according to the second aspect of the present invention will be described. In this embodiment, the contents of the steps are partially changed from those in the above-mentioned embodiment, so the same parts as those in the above-mentioned embodiment are designated by the same reference numerals, and the changed steps will be mainly described.

In this embodiment, first, a guide pile made of H-shaped steel is placed on the ground 21. On the other hand, a gripper 26 of a vibrator is fitted to an upper end of a driving jig 28 which is a rigid plate sandwiching a bag-like sheet 25 shown in FIG. Then, while transmitting the vibration from the vibrator to the driving jig 28 via the grip portion 26, the driving jig 28 is moved to the ground 21 along the guide pile as shown in FIG. 4 (i). I will place it in. Therefore, since the guide pile guides the driving jig 28 during this driving, the driving jig 28
The setting work can be done easily. Subsequent steps are the same as those in the above-described embodiment.

According to the above process, as shown in FIG. 7, the guide pile 29 made of the above H-shaped steel is arranged at the end of the bag-shaped sheet 25 into which the muddy water 23 is injected. Further, similarly to the above-described embodiment, it is possible to simultaneously form the groove for vibration isolation and arrange the bag-shaped sheet 25 in the groove, thereby improving the construction efficiency of the structure of the vibration isolating wall. it can.

At the end of the above process, since the guide pile 29 made of the H-shaped steel is arranged at the end of the bag-shaped sheet 25, another vibration isolating member adjacent to the bag-shaped sheet 25 is provided. The guide pile 29 protects the end portion of the bag-shaped sheet 25 when the groove is formed. Therefore, damage to the bag-shaped sheet 25 can be prevented.

In the embodiment of the method for constructing the structure of the vibration isolating wall, muddy water is injected into the bag-shaped sheet, but water or gel substance may be injected into the bag-shaped sheet. However, in order to stabilize the ground, it is more effective to infuse the bag-shaped sheet with muddy water having a larger specific gravity than water.

[0028]

As is apparent from the above description, according to the method of constructing the structure of the vibration isolating wall of the first aspect, the rigid plate sandwiching the bag-shaped sheet is placed on the ground, The rigid plate is pulled out from the ground while pouring a liquid or gel-like substance into the bag-shaped sheet. Therefore, the formation of the vibration isolation groove and the placement of the bag-shaped sheet in the groove can be performed at the same time, and the construction efficiency of the structure of the vibration isolation wall can be improved.

Further, according to the method of constructing the structure of the vibration isolating wall according to the second aspect, since the rigid plate sandwiching the bag-shaped sheet is laid on the ground along the guide pile laid on the ground, At the time of this driving, the rigid plate is guided by the guide pile, so that the operation of driving the rigid plate can be facilitated. Then, after the rigid plate is cast, the rigid plate is pulled out from the ground while injecting a liquid or gel-like substance into the bag-shaped sheet. Therefore, it is possible to simultaneously form the vibration isolation groove and arrange the bag-shaped sheet in which the liquid or gel-like substance is injected into the groove, thereby improving the construction efficiency of the structure of the vibration isolation wall. Further, since the guide pile is present at the end of the bag-shaped sheet, the guide pile of the bag-shaped sheet is formed when another vibration-isolating groove adjacent to the vibration-isolating groove is formed. It is possible to protect the ends and prevent the bag-shaped sheet from being damaged.

[Brief description of drawings]

FIG. 1 is a sectional view of a structure of a vibration isolating wall.

FIG. 2 is a cross-sectional view of the above structure.

FIG. 3 is a cross-sectional view of the above structure.

FIG. 4 is an explanatory view of an embodiment of a method of constructing a structure of a vibration isolating wall of the present invention.

FIG. 5 is an explanatory diagram of the above embodiment.

FIG. 6 is an explanatory diagram of the above embodiment.

FIG. 7 is an explanatory diagram of another embodiment of the building method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1,21 Ground 2 Groove 3,23 Muddy water 5,25 Bag-shaped sheet 26 Gripping part 27 Coupling preventing agent 28 Driving jig 29 Guide pile

Claims (2)

(57) [Claims] 1. The steps of placing a rigid plate sandwiching a bag-shaped sheet on the ground and then withdrawing the rigid plate from the ground while injecting a liquid or gel-like substance into the bag-shaped sheet are adjacent to each other. The method for constructing a structure of a vibration-insulating wall, characterized in that the bag-shaped sheet in which the liquid or gel-like substance is injected is continuously repeated substantially in the lateral direction. 2. A guide pile is placed on the ground, a rigid plate sandwiching a bag-shaped sheet is placed along the guide pile on the ground, and a liquid or gel-like substance is placed in the bag-shaped sheet. A method for constructing a structure of a vibration isolating wall, characterized in that the rigid plate is pulled out from the ground while pouring.