JP2005351057A - Prevention system of urban underground facilities or subways from flood water inflow or submersion - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To realize a new reliable prevention system of urban underground facilities or subways from flood water inflow or submersion, which also enables quick evacuation of refugees, effective prevention of natural disasters such as floods, etc., and improvements on the facilities into safe urban underground spaces contrary to conventional ones, including economical modifying work of their existing entrances and exits within a short construction period. <P>SOLUTION: A top-level staircase part is rotated to stand up nearly vertically to be used as an inflow water preventive door. Usually, at a level where this staircase part is stored, a staircase for refuge is formed by connecting the higher top step of the rotary staircase to the top step of a fixed staircase. In a small gap between a fixed staircase step surface and this movable step, a seal material is applied to completely prevent water inflow or leak through it. Entrance/exit to/from underground facilities is designed as a united structure of which mass production at a factory and transportation by a truck is possible. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a disaster prevention technique for urban infrastructure, which is a technique that can prevent inflow and flooding of urban underground facilities and subways when a disaster such as a flood occurs.

  Urban underground facilities and subways with restaurants and other stores have been developed and developed as important urban infrastructure, but unfortunately they are not fully prepared for natural disasters such as floods that hit urban areas. In recent years, there has been a serious accident involving death due to inflow water into urban underground facilities, and it has become a social situation that urgently requires fundamental countermeasures. It has been pointed out recently that the overall disaster prevention technology for urban infrastructure is still underdeveloped.

In the conventional technology for preventing inflow of water into urban underground facilities, a technology to seal the entrance and exit of stairway to underground facilities facing the road with a rising and falling type waterproofing board using tap water pressure assuming a power failure is put into practical use. Has been. Such an inflow water prevention means using a vertically erected waterproof plate is a very inconvenient disaster prevention technique for people who must go through the stairs, for example, those who need to evacuate. Evacuation is an inconvenient technique, especially for children, elderly people, and women wearing skirts. Even if it is separated, it is difficult to realize effective disaster prevention measures when the danger of underground shopping streets suddenly increases and many people are forced to evacuate, and it is strongly desired to solve this problem.
Japanese Patent Laid-Open No. 11-2077 JP 2003-321979 A Rainwater Technical Data, Vol. 37, pp. 7-18, Actual conditions and countermeasures of urban groundwater damage, 2006.6. (Sue) (Ministry of Land, Infrastructure, Transport and Tourism) Civil Engineering Technical Data, 43-2, pp. 30-35. Experiment on flood water inflow into underground space through stairs 2001.2. (Outside) (Ministry of Land, Infrastructure, Transport and Tourism)

  The first problem to be solved by the present invention is an urban facility with a high inflow water prevention effect that can be evacuated easily by many people in underground facilities where the danger has suddenly increased due to the breakage of the embankment. It is to realize an inflow water prevention device as a truly effective disaster prevention system.

  The second problem to be solved by the present invention is that it is possible to prevent inundation and leakage into underground facilities and subways by an almost perfect inflow water prevention effect, so that the underground facilities can be kept in a completely safe space. By improving safety as an infrastructure, it is possible to provide a safe underground facility evacuation space for people who have suddenly lost their evacuation destinations and places on the ground.

  The third problem to be solved by the present invention is that a stepped inflow prevention device that has a high effect of preventing inflow water at the entrance and exit of an existing underground facility and subway and is easy for a large number of people to evacuate is economical in a short construction period. It is possible to speed up the spread of socially effective technology by making it possible to modify it.

  In the present invention, first, a method of utilizing a part of the stairs as it is as the inflowing water preventing means is adopted. That is, by making the appropriate part around the top of the staircase several steps around 90 degrees, it is possible to replace the horizontal tread surface and the vertical step height surface with each other normally. Easily provide evacuation stairs at the entrance of stairs where the height increases. Furthermore, between the top of the entrance stairs and the top of the fixed staircase where the height is increased, an evacuation staircase is provided in the part that is always stored behind the rotating top staircase. It creates a state where the stairs are connected one by one. For this purpose, the both sides of the staircase are sealed with a seal member in a watertight manner so that they can rotate around the shafts at both ends near the uppermost staircase, and this shaft is a hydraulic drive device that can drive the accumulator in case of power failure. Is configured to rotate. In order to make it possible to install such disaster prevention technologies that are expected to spread quickly in a short period of time economically, close the entrance to the underground facilities and the subway, shutters, both sides, the rotary top step, It is constructed as a unit that can be mass-produced at the factory, including the emergency staircase storage space in the top staircase and the top staircase in the fixed staircase, and can be transported by truck.

  According to the present invention, although the dimensions of the step surface and step height of the staircase are switched at the top of the staircase whose height is high to prevent inflow of emergency water, the continuous one-step staircase is not interrupted. Because it is connected, it is possible to realize an inflow water prevention device near an underground staircase that can be easily evacuated by children, elderly people, and women wearing skirts. If the watertight structure between both sides of the staircase and the rotating upper staircase is made into a perfect design structure, it is easy to almost completely prevent slight water leaks. It is possible to secure underground facilities, etc., which were vacant spaces, as extremely safe urban spaces in times of disaster, which can be used as evacuation spaces as opposed to conventional ones. In addition, according to the present invention, since the stairs themselves also serve as a waterproof door for inflow water, a system that uses a relatively large road surface space such as a waterproof door that uses the buoyancy of water overflowing near the road surface. In contrast, inconveniences such as useless construction and occupation of the road surface during construction can be minimized. In addition, in the present invention, the entire apparatus is structured as a unit structure that can be mass-produced at the factory, so that the construction at the site requires only minimal construction work for removing unnecessary concrete and debris and unit installation work. In addition, it can be completed in a very short period of time, and it can be expected to accelerate the spread of new technologies that greatly reduce costs and increase the safety of urban infrastructure. In addition, the hydraulic drive unit that includes the accumulator rotates the upper part of the staircase, which is high enough to prevent inflow of emergency water. Over time, it can be expected that the upper part of the stairs can be kept evacuated with a strong force.

BEST MODE FOR CARRYING OUT THE INVENTION

  An embodiment as the best mode for carrying out the present invention is shown as a sectional view in FIGS. 1 and 2 separately for a normal normal state and an emergency inflow water prevention state. FIG. 1 shows an inflow water prevention apparatus according to the present invention in a normal normal state. What is a conventional entrance / exit stairs to an underground facility, except for a connection portion between an uppermost step portion capable of rotating by about 90 ° and a fixed side step. The basic structure is the same. That is, the entrance floor 2 having a certain height facing the road surface 1 serving as a right sidewalk is connected to the uppermost staircase portion 4 which is the same form as a normal staircase, so that the stairs can be used without a sense of incongruity. is there. However, a steel plate 7 having a thickness of about several millimeters is provided at the connecting portion between the rotatable uppermost staircase 4 and the uppermost step 15 of the fixed-side staircase, so that the burden on the foot can be reduced like a landing. The horizontal dimension of the tread is long. The steel plate 7 is held at its left end by a hinge 9 while the right end is sandwiched between the uppermost staircase portion 4 and a fixed plate 8 fixed to the side wall 6 so as not to move normally. An upward rib 10 is formed at the right end in contact with the uppermost staircase portion 4, and the rib 10 has a reinforcing effect of the relatively thin steel plate 7. An appropriate rubber material or the like is welded to the steel plate 7 in order to mitigate noise and vibration when the pressure of a shoe or the like is applied on the steel plate 7. The lower stairs after the uppermost step 15 of the fixed-side stairs are conventional stairs and continue to the underground facility. From the right end of the entrance / exit connected to the road surface 1 to the uppermost staircase 15 on the fixed side, an integrated entrance / exit unit 20 that can be mass-produced at the factory is configured. The entrance / exit unit 20 is provided with a shutter 3 facing the road surface 1 serving as a sidewalk, and a storage space 11 for a lower surface staircase 12 of an uppermost staircase portion 4 constituting an emergency escape staircase below the shutter 3. It has a necessary and sufficient depth. The rotating shaft 5 that is supported by the side surfaces 6 on both sides has a counterclockwise rotational moment acting between the center O and the center of gravity G of the rotary uppermost staircase portion 4. It is supported by being pressed against the vertical surface of the storage space 11. The tip portion 13 similarly supports the counterclockwise moment due to the weight of the user at the entrance / exit applied to the uppermost staircase portion 4. Since the rotary shaft 5 supports the rotary uppermost staircase portion 4 with a half area on the right side, a relatively large shaft size is adopted.

  FIG. 2 is a cross-sectional view in the case of an emergency that protects urban infrastructure from natural disasters such as floods when the inflow water prevention device of the present invention performs its function. Although not shown, the rotating shaft 5 of the uppermost staircase section 4 that rotates by about 90 ° is rotated clockwise by a combination of a hydraulic rotation driving device and an accumulator that can supply energy even during a power failure. By being driven to rotate strongly, the state of FIG. 1 is changed to the state of FIG. 2, and the uppermost staircase portion 4 is about 80 cm higher than the entrance floor 2. From the road surface 1, it becomes about 90 cm or higher, and a sufficient inflow water preventing effect can be expected. This height can be easily set to a higher height as needed by increasing the number of steps of the rotary uppermost staircase portion 4. Here, when the uppermost staircase portion 4 is rotated clockwise by the rotating shaft 5, the horizontal steel plate 7 is kicked up by the lower surface staircase 12 and naturally about 180 ° counterclockwise about the hinge 9. Since it is rotated and has a size slightly larger than the uppermost step 15 of the fixed-side staircase, it can be accommodated in the state shown in FIG. Almost no obstacle. At this time, the lower surface step 12 has a width corresponding to the dimension obtained by reducing the thickness of the pair of fixing plates 8 relative to the distance between the side walls 6 on both sides, so that it can rotate without interfering with the fixing plates 8. On the other hand, preventing a slight amount of water leakage is also a problem imposed on the apparatus of the present invention. For this purpose, the connection portion 14 with the uppermost step portion 4 at the rear end of the entrance floor 2 forms a cylindrical inner surface, A surface facing the curved surface of the uppermost staircase portion 4 is also configured to form a similar cylindrical outer surface 16. Therefore, both the cylindrical surfaces are in contact with each other at a slight interval, and although not shown in the drawing, a leak component can be completely prevented by a seal part made of a general elastomer or rubber material. The width of the uppermost staircase portion 4 other than the lower surface staircase 12 is slightly smaller than the distance between both side surfaces 6, and a sealing member that prevents water leakage is fixed between the uppermost staircase portion 4 and both side walls 6 to ensure the width. The object of the present invention can be achieved. Therefore, according to the present invention, when the inflow water prevention device that facilitates evacuation can reliably prevent even a slight water leak, the underground facility that was a dangerous space during a flood can be safely evacuated in contrast to the conventional case. It becomes possible to make a big change to space. However, the staircase of the rotary uppermost part 4 used at the time of evacuation has a small tread surface and a high step height and is difficult to use than a normal staircase, but it is somewhat inconvenient if it is used sideways. Is reduced.

  Longitudinal sectional view of the inflow water and inundation prevention device to the urban underground facility or subway of the present invention in normal times   Longitudinal sectional view of the inflow water and inundation prevention device of the device of the present invention into an urban underground facility or subway when a natural disaster such as a flood occurs

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Road surface 2 Entrance floor 3 Shutter 4 Rotating uppermost staircase 5 Rotating shaft provided on the side surface 6 Both side surfaces 7 Steel plate 8 Fixed plate 9 Steel plate hinge 10 Steel plate rib 11 Lower surface staircase storage space 12 Rotating uppermost staircase Lower surface staircase 13 Lower end staircase tip 14 Cylindrical inner surface 15 where the entrance floor contacts the uppermost staircase portion Fixed side staircase uppermost step 16 Cylindrical outer surface 20 which contacts the entrance floor of the rotary uppermost staircase portion The entire apparatus of the present invention is included. Entrance / exit unit to prevent inflow of water into underground facilities

Claims (5)

  At the upper part of the stairway facing the road that will be the entrance to the urban underground facility or subway, both sides near the top are shafts that allow the top staircase around several steps to rotate at an angle of approximately 90 ° in a watertight state. In case of an emergency such as a flood, a device for preventing inflow and inundation of water into urban underground facilities or subways equipped with an emergency drive device that rotates this uppermost staircase   When the uppermost staircase rotates in an emergency such as a flood, the surface that corresponds to the step height of the emergency staircase where the step surface of the staircase is almost vertical is the normal step height. In addition, the back of the uppermost staircase that is stored during normal times forms an emergency staircase that continuously connects the fixed staircase and the upper end of the uppermost staircase that is rotated and heightened in an emergency. The apparatus for preventing inflow and inundation of water into an urban underground facility or subway according to claim 1   The said emergency drive device includes a hydraulic drive device and an accumulator that enables energy supply in the event of a power failure. Inflow and flood prevention devices   The top of the fixed staircase connected to the rotating top staircase has a horizontal dimension larger than that of the other staircases, and the corner that touches the top of the rotating top staircase is hinged. And a steel plate having a dimension slightly larger than the horizontal dimension of the uppermost step of the fixed staircase is provided. The apparatus for preventing inflow and inundation of water into an urban underground facility or subway according to claim 1 or 2, characterized in that the device is sandwiched between lower tiers.   Installation site as a unit mass-produced at the factory, including the shutters at the entrances and exits of underground facilities and subways to the top of the fixed staircase, the side walls on both sides, and the emergency staircase storage space below the rotating top staircase The apparatus for preventing inflow and inundation of water into an urban underground facility or subway according to any one of the preceding claims, characterized in that it is an integrated structure that can be transported to

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