JP2009035889A - Vertical pipe floating prevention device, and draining structure built in vertical pipe floating prevention device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vertical pipe floating prevention device, and a draining structure built in the vertical pipe floating prevention device. <P>SOLUTION: The vertical pipe floating prevention device is set up by forming a groundwater inflow hole 3 in a vertical pipe 2 embedded in the ground 1, defining a groundwater inflow portion 4 into which groundwater flows from the groundwater inflow hole 3, in the vertical pipe 2, and draining the groundwater from an upper drain port 4a formed in the groundwater inflow portion 4 into the vertical pipe 2 in case of water level elevation in the groundwater inflow portion 4, caused by liquefaction of the ground 1, to thereby prevent the vertical pipe 2 from floating. Herein the vertical pipe floating prevention device is composed of: a lower drain port 6 located under the upper drain port 4a of the groundwater inflow portion 4; an opening/closing portion 5 for blocking the lower drain port 6 to cut off water; and an opening/closing portion activation mechanism 7 for opening the opening/closing portion 5 upon reception of the weight of the groundwater drained from the upper drain port 4a of the groundwater inflow portion 4. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a vertical pipe levitation prevention device that prevents the vertical pipe from rising due to a rise in water level due to liquefaction of the ground, and a drainage structure provided in the vertical pipe levitation prevention device.

  In recent years, with the occurrence of earthquakes, the phenomenon of floating vertical pipes (for example, manholes) embedded in the ground caused by liquefaction of the ground has become a problem.

  Therefore, conventionally, as a means for preventing the manhole floating phenomenon, for example, a vertical pipe floating prevention device (hereinafter, a conventional example) disclosed in Japanese Patent Application Laid-Open No. 2007-63977 has been proposed.

  In this conventional example, an inflow hole for muddy water accompanying liquefaction is provided in the middle of the side wall of the manhole, and a riser pipe having an inflow hole at the lower end and an upper end at the groundwater level along the inner wall surface of the manhole is provided. When groundwater accompanying liquefaction is concentrated on the surrounding ground directly under the manhole due to an earthquake, etc., the groundwater is raised by the riser and diffused into the manhole from the upper end. The structure is adapted to changes in water level (normal and emergency).

  In other words, it is necessary to eliminate the water that fills the lower side of the manhole that causes the manhole to rise, so that the inflow hole is naturally below the manhole. However, in this case, it is usually necessary to maintain the minimum groundwater level required for the ground, as well as excessive groundwater inflow to the mains. As a result, the inflow hole cannot be provided on the lower side of the manhole, and therefore the groundwater level changes only when the inflow hole is provided (normal and emergency). It is because it cannot respond to.

  In this respect, the conventional example can cope with the above-described change in the groundwater level (normal time and emergency time) by providing a rising pipe that raises the groundwater flowing from the inflow hole provided below the manhole.

JP 2007-63977 A

  However, the conventional example has a limit in adopting a large riser pipe as the riser pipe disposed in the manhole due to the relationship between people entering and exiting the manhole. It is said that there is a limit.

  As a result of repeatedly conducting various experiments and researches by paying attention to the above-mentioned problems, the present inventor is provided in an epoch-making vertical tube levitation prevention device and vertical tube levitation prevention device that exhibit unprecedented effects. A drainage structure was developed.

  The gist of the present invention will be described with reference to the accompanying drawings.

  A groundwater inflow hole 3 is provided in a vertical pipe 2 embedded in the ground 1, and a groundwater inflow portion 4 through which groundwater flows from the groundwater inflow hole 3 is provided in the vertical pipe 2, thereby increasing the water level due to liquefaction of the ground 1. Accordingly, the vertical pipe configured to prevent the vertical pipe 2 from rising by draining the groundwater rising in the groundwater inflow section 4 from the upper drainage port 4a provided in the groundwater inflow section 4 into the vertical pipe 2. A levitation prevention device, wherein a lower drainage port 6 is provided at a position below the upper drainage port 4a of the groundwater inflow portion 4, and an opening / closing unit 5 is provided to close the lower drainage port 6 and stop water, A vertical pipe levitation prevention device comprising an opening / closing section operating mechanism 7 that opens and moves the opening / closing section 5 by receiving the weight of groundwater drained from the upper drain 4a of the groundwater inflow section 4. is there.

  The opening / closing part operating mechanism 7 is configured to move the opening / closing part 5 open by receiving the weight of groundwater drained and dropped from the upper drain 4a of the groundwater inflow part 4. This relates to the vertical tube floating prevention device according to Item 1.

  The opening / closing section operating mechanism 7 includes a water receiving container 8 that receives groundwater drained from the upper drain 4 a of the groundwater inflow section 4, and a drain from a drain section 9 provided in the water receiving container 8. It is characterized by comprising an actuating body 10 that operates when the amount of groundwater exceeding the amount is disposed in the water receiving container 8 and the water receiving container 8 becomes heavier than a predetermined weight, and moves the opening and closing part 5 open. It concerns on the vertical pipe floating prevention apparatus of any one of Claim 1, 2 to do.

  Further, when the ground water arranged in the water receiving body 8 is removed from the draining portion 9 and the water receiving container 8 becomes lighter than a predetermined weight, the operating body 10 is operated to close and move the opening / closing portion 5. The vertical tube floating prevention device according to claim 3, wherein the opening / closing portion operating mechanism 7 is configured so as to squeeze.

  5. The vertical tube levitation according to claim 3, wherein the operating body 10 is a link structure formed by pivotally connecting a plurality of operating members 10 a, 10 b, and 10 c. This relates to a prevention device.

  6. The vertical pipe according to claim 1, wherein the lower drainage port 6 is provided at a lower end portion of the groundwater inflow portion 4 at a position lower than the groundwater inflow hole 3. The present invention relates to an ascent prevention device.

  In addition, a groundwater inflow hole 3 is provided in the vertical pipe 2 embedded in the ground 1, and a groundwater inflow portion 4 through which groundwater flows from the groundwater inflow hole 3 is provided in the vertical pipe 2, and the water level due to liquefaction of the ground 1 It is configured to prevent the vertical pipe 2 from rising by draining the groundwater that has risen in the groundwater inflow part 4 with the rise from the upper drainage port 4a provided in the groundwater inflow part 4 into the vertical pipe 2. A drainage structure provided in the vertical pipe levitation prevention device, the open / close part 5 closing the lower drainage port 6 provided at a position lower than the upper drainage port 4a of the groundwater inflow part 4 and stopping the water, and the groundwater A drainage structure provided in a vertical pipe anti-floating device, comprising: an opening / closing part operating mechanism 7 for opening and closing the opening / closing part 5 by receiving the weight of groundwater drained from the upper drainage port 4a of the inflow part 4 It is related to.

  Since the present invention is configured as described above, compared to the conventional example described above, when the groundwater level rises due to liquefaction of the ground, sufficient drainage is performed to prevent the vertical pipe from rising as much as possible. In addition, because the structure of the opening / closing part that shuts off the water by closing the lower outlet is performed using the weight of the groundwater drained from the upper outlet, no extra power is required and the cost is low. It is an epoch-making vertical tube anti-floating device that exhibits unprecedented effects.

  Further, in the invention according to claim 2, since it has a very efficient structure using the force of dropping groundwater, it is an epoch-making vertical pipe that exhibits unprecedented effects such as further cost reduction. It becomes a floating prevention device.

  In the invention according to claim 3, a structure is provided in which the opening and closing part can be reliably moved open using the weight of the groundwater, and the amount of water flowing out from the draining part is set appropriately, An epoch-making vertical tube anti-floating device that exhibits unprecedented effects such as opening and closing of the opening and closing part only when draining from the upper drainage in an emergency such as a rise in water level due to liquefaction Become.

  Further, in the invention according to claim 4, since the opening / closing part is automatically closed, there is no conventional work such as the need for the operator to enter and close the vertical pipe every time the opening / closing part is opened. This is an epoch-making vertical tube levitation prevention device that exhibits its effects.

  Further, the invention according to claim 5 is an epoch-making vertical tube levitation preventing device that exhibits unprecedented effects such as the ability to move the opening and closing portion efficiently and reliably with a small force.

  Moreover, in invention of Claim 6, it becomes an epoch-making vertical pipe floating prevention apparatus which exhibits the effect which is not in the past, such as being able to drain | drain well the groundwater accommodated in a groundwater inflow part.

  The invention according to claim 7 is an epoch-making vertical pipe that exhibits an unprecedented effect such as being able to be applied not only to a newly installed vertical pipe floating prevention device but also to an existing vertical pipe floating prevention device. It becomes the drainage structure provided in the anti-floating device.

  Embodiments of the present invention considered to be suitable will be briefly described with reference to the drawings.

  The situation where groundwater is drained from the upper drainage port 4a of the groundwater inflow part 4 (in an emergency), that is, when the ground 1 is liquefied, the groundwater that has risen in the groundwater inflow part 4 enters the groundwater inflow part 4 The open / close section is operated by operating the opening / closing section operating mechanism 7 by draining the vertical drain 2 from the provided upper drain 4a into the vertical pipe 2 and receiving the weight of the groundwater drained from the upper drain 4a of the groundwater inflow section 4. 5 is movable to open, the lower drainage port 6 is opened, and drainage is also performed from the lower drainage port 6.

  Accordingly, good drainage is performed by the upper drainage port 4a and the lower drainage port 6 of the groundwater inflow portion 4, and the drainage function of the groundwater inflow portion is dramatically improved as compared with the above-described conventional example. Therefore, the vertical pipe 2 can be prevented from rising as much as possible.

  In addition, the present invention has a structure in which the opening / closing section operating mechanism 7 that opens and closes the opening / closing section 5 that closes and shuts off the lower drainage port 6 is performed using the weight of groundwater drained from the upper drainage port 4a. Therefore, no special power is required, and the cost can be reduced (manufacturing cost and running cost can be reduced), and the structure can be made compact.

  A specific embodiment of the present invention will be described with reference to the drawings.

  In the present embodiment, a groundwater inflow hole 3 is provided in a vertical pipe 2 embedded in the ground 1, and a groundwater inflow portion 4 through which groundwater flows from the groundwater inflow hole 3 is provided in the vertical pipe 2. The vertical pipe 2 is prevented from rising by draining the groundwater that has risen in the groundwater inflow part 4 with the rise of the water level into the vertical pipe 2 from the upper drainage port 4 a provided in the groundwater inflow part 4. It is configured.

  Specifically, in this embodiment, a bottomed cylindrical manhole in which a main pipe 18 (sewer pipe) is connected to a lower part is adopted as the vertical pipe 2 embedded in the ground 1. The vertical tube 2 is not limited to a manhole, and can be appropriately adopted as long as it has a configuration that exhibits the characteristics of this embodiment.

  In addition, three groundwater inflow holes 3 are formed at equal intervals in the radial direction in the lower part of the vertical pipe 2 (lower part than the central part). In addition, the number and position of this groundwater inflow hole 3 can be changed suitably.

  A groundwater inflow portion 4 is connected to each of the groundwater inflow holes 3.

  The groundwater inflow portion 4 is a box-like body formed of an appropriate metal member as shown in FIGS. 1 and 2, and a cylindrical water inflow portion that is fitted into the groundwater inflow hole 3 at a lower portion of the inner surface thereof. 11 is protruding. In addition, the groundwater inflow part 4 may be comprised with a vinyl chloride pipe | tube, and the raw material and shape can change a design suitably.

  The water inlet 11 is a part for allowing groundwater around the vertical pipe 2 to flow into the groundwater inflow part 4, and a filter 12 is provided therein. In addition, it is good also as a structure which provides a through-hole in the surrounding surface of the inflow part 11, and covers this inflow part 11 with a planar filter. It only has to have.

  The groundwater inflow portion 4 is disposed on the inner wall surface of the vertical pipe 2 in a state where the water inlet 11 is fitted into the groundwater inflow hole 3 of the vertical pipe 2.

  Moreover, the upper end of the groundwater inflow part 4 is opened and set to the upper drainage port 4a, and the groundwater flowing into the groundwater inflow part 4 from the above-described water inlet 11 (groundwater inflow hole 3) is the upper drainage. The water is drained into the vertical pipe 2 from the mouth 4a.

  Further, a drainage structure 13 different from the upper drainage port 4a is provided in the groundwater inflow portion 4.

  Specifically, a lower drainage port 6 is formed at the lower end of the groundwater inflow portion 4 lower than the water inlet 11 (groundwater inflow hole 3).

  The lower drainage port 6 is provided with a synthetic resin (rubber) opening / closing portion 5 that closes the lower drainage port 6 and stops water, and the opening / closing portion 5 has a rise in water level due to liquefaction of the ground. The opening / closing part operating mechanism 7 that operates in the event of an emergency is movable up and down in the vertical direction. Reference numeral 16 denotes a guide portion that guides the vertical movement of the rod-shaped slide member 5 a provided in the opening / closing portion 5.

  Specifically, the opening / closing section operating mechanism 7 includes a water receiving container 8 that receives the groundwater drained from the upper drain 4 a of the groundwater inflow section 4, and a drain from the drain section 9 provided in the water receiving container 8. The groundwater exceeding the amount is arranged in the water receiving body 8 and is actuated when the water receiving body 8 becomes heavier than a predetermined weight, and is configured by an operating body 10 that opens and closes the opening / closing part 5.

  The water receiving body 8 is formed of an appropriate metal member as shown in FIGS. 1 and 2, and is an urging body suspended from a support member 14 protruding from a lower surface portion of the groundwater inflow portion 4. 15 is suspended.

  The water receiving body 8 is provided so as to store a predetermined amount of water, and the energizing force is applied when the water receiving body 8 is subjected to a predetermined weight or more (when a predetermined amount or more of water enters). Returning to the body 15, the water receiving body 8 moves downward against the bias.

  Further, the water receiving container 8 is provided with a water draining portion 9, and water is drained from the water draining portion 9 so that the water receiving container 8 becomes lighter than a predetermined weight. The water receiving container 8 moves upward.

  The drainage portion 9 is configured by providing a nozzle 9b in a hole 9a formed in the bottom of the water receiving container 8, and the amount of water drainage can be adjusted by the nozzle 9b. By adjusting the amount of drainage in the drainage portion 9, for example, the drainage container 8 becomes lighter than a predetermined weight in several hours so that the opening / closing portion 5 can be closed and moved by being moved upward by the biasing body 15. It is possible to easily and reliably make adjustments.

  The actuating body 10 is a link structure formed by pivotally connecting a plurality of actuating members 10 a, 10 b, 10 c as shown in FIG. 1, and one end of the actuating body 10 is connected to the lower end of the water receiving container 8. The other end is connected to the opening / closing part 5.

  Specifically, a first actuating member 10a that is pivotally attached to the lower end of the water receiving body 8 and is suspended, a second actuating member 10c that is pivotally attached to the lower end of the opening / closing part 5 and is suspended, The first operating member 10a and the second operating member 10c are pivotally attached to the lower end portions of the first operating member 10a and the third operating member 10b. The third operating member 10b is pivotally attached to a support plate 17 whose central portion is suspended from the groundwater inflow portion 4.

  From this configuration, when the water receiving container 8 moves downward against the return bias of the biasing body 15, the first actuation member 10a moves downward to move one end of the third actuation member 10b. The other end of the third actuating member 10b moves upward by pushing down the part, and the second actuating member 10c moves upward by moving the other end of the third actuating member 10b upward. The opening / closing part 5 is moved upward. On the other hand, when the water receiving body 8 moves upward due to the return bias of the biasing body 15, the operating body 10 operates in the opposite direction to move the opening / closing part 5 downward.

  FIG. 6 shows a case where the water inlet 11 of the groundwater inflow part 4 is extended to collect more water around the vertical pipe 2. FIG. 7 shows the water inlet 11 below the foundation of the building 19. It is the case where it is provided so as to prevent the building 19 from rising as well as the vertical pipe 2 by arranging.

  Reference numeral 20 denotes a guide plate for guiding the groundwater drained from the lower drainage port 6 to the water receiving container 8.

  The operation of the vertical tube levitation preventing apparatus according to this embodiment having the above-described configuration will be described.

  The situation where groundwater is drained from the upper drainage port 4a of the groundwater inflow section 4 (in an emergency), that is, when the ground 1 is liquefied by an earthquake, the groundwater that has risen in the groundwater inflow section 4 is the groundwater inflow section The groundwater that has been drained from the upper drainage port 4 a provided in 4 into the vertical pipe 2 and drained from the upper drainage port 4 a of the groundwater inflow portion 4 and dropped is distributed to the water receiving container 8.

  Subsequently, when the water receiving container 8 becomes heavier than a predetermined weight due to the groundwater, the water receiving container 8 moves downward against the return bias of the biasing body 15, and the movement of the water receiving container 8 As the operating body 10 moves, the opening / closing part 5 moves upward, the water stoppage state of the lower drainage port 6 is released, and the groundwater in the groundwater inflow part 4 is drained from the lower drainage port 6 (FIG. 3).

  Subsequently, when a predetermined amount of water is removed from the drainage portion 9 and the weight of the water receiving container 8 becomes lighter than a predetermined weight, the water receiving container 8 is moved upward by the biasing force of the biasing body 15. As the water receiving container 8 moves, the operating body 10 operates to move the opening / closing part 5 downward, thereby closing the lower drainage port 6 and turning off the water (see FIGS. 4 and 5).

  Since the present embodiment is configured as described above, good drainage is performed by the upper drainage port 4a and the lower drainage port 6 of the groundwater inflow portion 4. Compared to the conventional example described above, As a result, the drainage function is dramatically improved, so that the vertical pipe 2 can be prevented from rising as much as possible.

  Further, in this embodiment, the opening / closing section operating mechanism 7 that opens and closes the opening / closing section 5 that closes and shuts off the lower drainage port 6 is used by utilizing the weight of the groundwater drained from the upper drainage port 4a. For this reason, no special power (for example, power of a motor, an engine, etc.) is required, and the cost can be reduced (manufacturing cost and running cost can be reduced), and the structure can be made compact.

  In addition, the opening / closing part operating mechanism 7 according to the present embodiment is configured to operate by receiving the weight of groundwater that has been drained and dropped from the upper drainage port 4a of the groundwater inflow part 4 so that the opening / closing part 5 can be opened and moved. In addition, since the structure is very efficient using the groundwater falling force, the cost is further reduced.

  Further, the opening / closing section operating mechanism 7 according to the present embodiment includes a water receiving container 8 that receives groundwater drained from the upper drain 4 a of the groundwater inflow section 4, and a drainage section 9 provided in the water receiving container 8. Since the groundwater exceeding the drainage amount is arranged in the water receiving container 8 and is operated by the water receiving container 8 becoming heavier than a predetermined weight, the operating body 10 is configured to open and move the open / close part 5. The structure in which the opening / closing part 5 can be opened and moved reliably using the weight of the water is obtained, and the upper part in an emergency such as a rise in the water level due to liquefaction of the ground 1 can be obtained by appropriately setting the amount of water that drains from the draining part 9. Only when the water is discharged from the drain port 4a, the opening / closing part 5 can be opened and moved.

  Further, in this embodiment, the ground water arranged in the water receiving container 8 is removed from the draining part 9 and the water receiving container 8 becomes lighter than a predetermined weight, so that the operating body 10 operates and the opening / closing part 5 is movable. Since the opening / closing part operating mechanism 7 is configured to cause the opening / closing part 5 to automatically close, the opening / closing part 5 is automatically closed, so that, for example, an operator does not need to enter and close the vertical pipe 2 every time the opening / closing part 5 is opened. It becomes.

  In this embodiment, since the operating body 10 is a link structure formed by pivotally connecting a plurality of operating members 10a, 10b, 10c, the opening / closing part 5 can be operated efficiently and reliably with a small force. It will be possible.

  Further, in this embodiment, since the lower drainage port 6 is provided at a lower position than the groundwater inflow hole 3 at the lower end portion of the groundwater inflow portion 4, the groundwater stored in the groundwater inflow portion 4 can be drained well. it can.

  Note that the present invention is not limited to this embodiment, and the specific configuration of each component can be designed as appropriate.

It is front sectional drawing which shows a present Example. It is a top view which shows a present Example. It is operation | movement explanatory drawing of a present Example. It is operation | movement explanatory drawing of a present Example. It is operation | movement explanatory drawing of a present Example. It is a front sectional view showing another embodiment. It is a front sectional view showing another example of use.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ground 2 Vertical pipe 3 Groundwater inflow hole 4 Groundwater inflow part 4a Upper drainage port 5 Opening / closing part 6 Lower drainage port 7 Opening / closing part operation mechanism 8 Water receiving container 9 Drainage part
10 Actuator
10a Actuating member
10b Actuating member
10c Actuating member

Claims (7)

  The vertical pipe buried in the ground is provided with a groundwater inflow hole, and a groundwater inflow part through which groundwater flows from the groundwater inflow hole is provided in the vertical pipe, and the groundwater inflow part rises as the water level rises due to liquefaction of the ground. A vertical pipe levitation prevention device configured to prevent the vertical pipe from rising by draining groundwater into the vertical pipe from an upper drainage port provided in the groundwater inflow part, wherein the upper drainage of the groundwater inflow part A lower drainage port is provided at a position lower than the mouth, and an opening / closing part for closing the lower drainage port to stop water is provided, and the opening / closing is performed by receiving the weight of groundwater drained from the upper drainage port of the groundwater inflow part. A vertical tube levitation preventing device comprising an opening / closing section operating mechanism for allowing the section to move open.   2. The vertical pipe according to claim 1, wherein the opening / closing part operating mechanism is configured to open and move the opening / closing part by receiving a weight of groundwater drained and dropped from the upper drain of the groundwater inflow part. Anti-floating device.   The opening / closing section operating mechanism includes a water receiving container that receives groundwater drained from the upper drain of the groundwater inflow section, and groundwater that exceeds a drainage amount from a draining section provided in the water receiving container. Either of the claims 1 and 2, wherein the water receiving container is arranged so as to be actuated when the water receiving container becomes heavier than a predetermined weight, and the opening / closing part is movable. The vertical pipe ascent prevention device as described.   The opening / closing part operation is performed so that the operating body is activated and the opening / closing part is closed and movable when groundwater arranged in the water receiving body is removed from the drainage part and the water receiving container becomes lighter than a predetermined weight. 4. The vertical tube floating prevention device according to claim 3, wherein the mechanism is configured.   The vertical tube floating prevention device according to any one of claims 3 and 4, wherein the operating body is a link structure formed by pivotally connecting a plurality of operating members.   The vertical pipe ascent prevention device according to any one of claims 1 to 5, wherein the lower drainage port is provided at a lower end of the groundwater inflow portion at a position lower than the groundwater inflow hole.   The vertical pipe buried in the ground is provided with a groundwater inflow hole, and a groundwater inflow part through which groundwater flows from the groundwater inflow hole is provided in the vertical pipe, and the groundwater inflow part rises as the water level rises due to liquefaction of the ground. A drainage structure provided in a vertical pipe ascent prevention device configured to prevent the vertical pipe from rising by draining groundwater into the vertical pipe from an upper drainage port provided in the groundwater inflow section, wherein the groundwater inflow An opening / closing part that shuts off and shuts off a lower drainage port provided at a position below the upper drainage port of the part, and receives the weight of groundwater drained from the upper drainage port of the groundwater inflow part to A drainage structure provided in a vertical pipe levitation prevention device, characterized by comprising an opening / closing section operating mechanism that is movable.

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