JP2015068081A - Permeable gutter and ground construction method around building using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a permeable gutter that can prevent the occurrence of liquefaction by releasing a rising groundwater generated in the ground, for example, when the liquefaction is going to occur, and provide a ground construction method around a building using the permeable gutter.SOLUTION: A gutter body 1B is a gutter having water permeation, and the whole is formed by concrete having a predetermined length, width and height. A substantially U-shaped water channel 1a with an opened upward is formed in the upper part, and a hollow channel 1b penetrating in the length direction is formed in the lower part. A portion or the whole in an area lower than a predetermined height position is constituted of permeable concrete F.

Description

  The present invention relates to a side groove having water permeability, and further relates to a ground construction method around a building using the side groove.

  One of the problems when an earthquake occurs is the liquefaction phenomenon of the ground. Such a liquefaction phenomenon is a place where the groundwater level is high or where the groundwater level rises for some reason, and when a continuous vibration is applied to the ground due to an earthquake or the like, the volume of the ground decreases rapidly. This is a phenomenon in which the yield strength is lost and the groundwater rises and erupts to the ground surface with sand. When this liquefaction occurs, ground subsidence / dissimilar subsidence occurs as the ground volume decreases and groundwater rises, causing the building to tilt and collapse, and the ground surrounding the building sinks and collapses. .

In order to solve the above problems, as a method of ground construction against liquefaction, replacement method to improve ground particle size and surface mixing treatment method to increase strength by mixing quality improvement material, forced drainage of groundwater in the ground Various methods have been proposed, such as the well point method.
However, both the above replacement method and surface layer mixing method are intended to improve the ground itself, and depending on the size of the building, that is, the area required for ground improvement, the work cost increases and the cost increases. Will increase. In addition, since the well point method is a method in which the well is buried under the building, the installation of the well is limited to the new construction of the building, and can be used as a countermeasure for the existing building. Can not.

  Therefore, the groundwater generated when the liquefaction phenomenon is about to occur by focusing on the ground around the already constructed building and approaching the process where the liquefaction phenomenon occurs rather than improving the ground itself. A method for preventing the occurrence of the liquefaction phenomenon by waiting for a device for escaping the rise in the temperature is waiting.

JP 2007-239405 A

  Therefore, in view of the above problems, the present invention can prevent the occurrence of the liquefaction phenomenon by, for example, escaping the groundwater generated in the ground around the building when the liquefaction phenomenon is about to occur. It is an object of the present invention to provide an infiltration side groove that can be formed and a ground construction method around the building using the infiltration side groove.

  In order to solve the above-mentioned problem, the infiltration side groove of the present invention is a side groove having water permeability, and in the entire side groove body having the required length, width, and height formed of concrete, the upper portion is at the top. An open substantially U-shaped water channel is formed, and a hollow channel penetrating in the length direction is formed in the lower part, and a part or all of the region below the predetermined height position is made of permeable concrete. It has become.

  Further, in the infiltration side groove of the present invention, the region below the predetermined height position constituting the permeable concrete is the region below the intermediate position between the substantially U-shaped water channel formed in the upper part and the hollow channel formed in the lower part. It has a certain configuration.

  Furthermore, the penetration | invasion side groove | channel of this invention becomes a structure from which the area | region below the predetermined height position which comprises water-permeable concrete is a lower area | region from the predetermined middle height position in the substantially U-shaped water channel formed in upper part. .

  Still further, the ground construction method around the building according to the present invention is a method of excavating a side groove having a required length, width and depth for embedding the infiltration side groove on the front ground of the building. A trench groove excavation step for excavating a trench groove having a required length, width, and depth for embedding an infiltration trench from the side groove groove toward a surrounding ground of the building, and the side groove groove excavation The side groove groove excavated by the process has a required length, width, and height, and at least a part of the side groove insertion process having a permeation function is inserted. A trench insertion step of inserting a plurality of permeation trenches having a required length, width, and height and having a permeation function at least in part, and the side groove insertion step and the trench insertion step. Permeation ditch and permeation training A connecting step for connecting the abutting portion with the groove, a side groove embedding step for refilling the periphery of the permeation side groove inserted in the side groove groove by the side groove inserting step, and a trench inserting step for inserting into the trench groove. And a trench embedding step of refilling the periphery of the infiltrated trench.

  Furthermore, the ground construction method around the building according to the present invention includes a crushed stone laying step of laying crushed stones in the side groove grooves as a pre-process of the side groove inserting step.

  In addition, the ground construction method around the building according to the present invention may employ a configuration in which a connecting rod is installed at a butt portion between the infiltration side groove and the infiltration trench in the connection step.

  Furthermore, in the ground construction method around the building according to the present invention, the connection rod is configured to have a seepage structure.

  According to the infiltration side groove according to the present invention, for example, rising groundwater generated when a liquefaction phenomenon occurs can be collected through the infiltration trench and effectively removed from the ground. It is possible to prevent the water from being pushed up by the water pressure in liquefaction, and the groundwater collected in the permeation side ditch is drained to other places through the upper substantially U-shaped waterway. It has an excellent effect that it can be re-infiltrated into the basement.

  In addition, according to the ground construction method around the building according to the present invention, since it is a construction method to be constructed on the ground around the building, unlike the liquefaction countermeasures in which wells are buried under the building at the time of new construction, It is very effective as a countermeasure against liquefaction, and it is possible to prevent ground subsidence and uneven subsidence by preventing softening of the ground not only for buildings but also for the surrounding ground. Play.

It is a front sectional view showing an embodiment of a penetration side groove concerning the present invention. Example 1 It is a flowchart which shows embodiment of the ground construction construction method around the building concerning this invention. (Example 2) It is a top view which shows embodiment of the ground construction method around the building concerning this invention. (Example 2) It is a perspective sectional view showing an embodiment of a ground construction method around a building according to the present invention. (Example 2) It is a principal part enlarged view which shows embodiment of the ground construction construction method around the building concerning this invention. (Example 2) It is a flowchart which shows embodiment of the ground construction construction method around the building concerning this invention. (Example 3) It is a principal part enlarged view which shows embodiment of the ground construction construction method around the building concerning this invention. (Example 3)

  The infiltration side groove 1 of the present invention has a substantially U-shaped water channel 1a with an upper opening formed in the upper part of a side groove main body 1B having a required length, width, and height formed of concrete. Is characterized in that a hollow passage 1b penetrating in the length direction is formed, and a part or all of the region below the predetermined height position is made of water-permeable concrete F. Further, the ground construction method around the building according to the present invention is to excavate a groove for a side groove and excavate a trench groove when constructing the ground G around the building H, and to penetrate each side of the excavated groove. 1 and osmotic trench 2 are inserted, and through the respective steps of backfilling the periphery of osmotic side groove 1 and osmotic trench 2 in a state where the butted portions of osmotic side groove 1 and osmotic trench 2 are connected, The greatest feature is to construct a ground G that can prevent liquefaction around the building H. DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment of a permeation side groove 1 and a ground construction method around a building using the permeation side groove 1 according to the present invention will be described with reference to the drawings.

  In addition, this invention is not limited to the structure and aspect shown to the following embodiment, In the range which does not deviate from the summary of the technical idea of this invention, it can change arbitrarily.

FIG. 1 is a front sectional view showing an embodiment of a permeation side groove 1 according to the present invention.
As shown in FIG. 1, a permeation side groove 1 according to the present invention is a side groove 1 having water permeability, and in the side groove main body 1 </ b> B, which has a required length, width, and height and is formed of concrete, A substantially U-shaped water channel 1a having an upper opening is formed on the lower portion, and a hollow channel 1b penetrating in the length direction is formed in the lower part, so-called substantially U-shaped water channel 1a and hollow channel 1b. The two water channels 1A are provided at the top and bottom.

  The substantially U-shaped water channel 1a and the hollow channel 1b are separated by the concrete that forms the side groove main body 1B. If necessary, a hole penetrating the substantially U-shaped water channel 1a and the hollow channel 1b is provided at a predetermined position. Embodiments are possible.

  A part or all of the permeation side groove 1 in a region below the predetermined height position of the side groove main body 1B is molded from water-permeable concrete. In addition, parts other than the permeation concrete F in the permeation side groove 1 are made of ordinary concrete. At this time, the position and size of the permeation concrete F portion may be determined in consideration of the permeation efficiency of the permeation side groove 1 and the geology of the ground G to be buried.

  As shown in FIG. 1 (a), an intermediate position between a substantially U-shaped water channel 1a formed in the upper portion and a hollow channel 1b formed in the lower portion of the region below the predetermined height position constituting the water-permeable concrete. A mode in which the lower region is considered as a lower region is also conceivable, or as shown in FIG. 1B, a mode in which the lower region is defined from a predetermined intermediate height position in the substantially U-shaped water channel 1a formed at the upper portion is also possible.

  In the infiltration side groove 1, since part or all of the side groove main body 1B is formed of water-permeable concrete, the groundwater flowing into the substantially U-shaped water channel 1a or the hollow channel 1b is effectively infiltrated into the underground G. In addition, since the water channel 1A employs a two-stage structure of a substantially U-shaped water channel 1a and a hollow channel 1b, the substantially U-shaped water channel 1a functions as a normal side groove 1. At the same time, by accepting the ascending groundwater by the substantially U-shaped water channel 1a and the hollow channel 1b when the ground inundation due to the groundwater causing liquefaction occurs, the allowable amount of the groundwater is improved, This will contribute to the prevention of chemical phenomenon.

2 to 5 show a first embodiment of the ground construction method around the building H according to the present invention. FIG. 2 is a flowchart, FIG. 3 is a plan view, FIG. 4 is a perspective sectional view, and FIG. These are the principal part enlarged views.
As shown in FIG. 2, the ground construction method around the building H according to the present embodiment includes a groove excavation step for a side groove, a trench groove excavation step, a side groove insertion step, a trench insertion step, and a connection step. And a trench embedding process and a trench embedding process.

  The side groove groove excavation step is a step of excavating a lateral groove for embedding the permeation side groove 1. Specifically, it is a step of excavating a groove for a side groove having a required length, width, and depth in the front ground G of the building H. At this time, the overall length of the groove for the side groove is determined by the overall length of the plurality of penetration side grooves 1 to be inserted, and is dug longer than at least the front length of the building H. The width and depth of the side groove are determined in consideration of the width and height of the permeation side groove 1 to be inserted.

  The trench groove excavation step is a step of excavating a lateral groove for embedding the infiltration trench 2. Specifically, it is a step of excavating a trench groove having a required length, width and depth in the surrounding ground G of the building H. The trench groove is excavated in a comb shape or an enclosure shape from the side groove groove avoiding the building H, that is, at least one end of the trench groove is excavated in a state connected to the side groove groove. At this time, the total length of the trench groove is determined by the overall length of the plurality of penetration trenches 2 to be inserted. In addition, the width and depth of the trench are determined in consideration of the width and height of the penetration trench 2 to be inserted and the insertion depth position.

  The side groove insertion step is a step of inserting the permeation side groove 1 into the side groove groove excavated by the side groove groove excavation step. The shape of the side groove 1 to be inserted is not particularly limited. For example, as shown in FIG. 5 (b), the side groove 1 having a substantially U-shaped water channel 1a having an upper opening or a water intake on the upper surface (not shown). A side groove 1 having a mouth and having a hollow path inside can be considered. 4 and 5A show a case where the permeation side groove 1 in which a substantially U-shaped water channel 1a is formed in the upper portion and a substantially circular hollow channel 1b is formed in the lower portion is employed. The side groove 1 has a required length, width and height, and is provided with an infiltration function F at least partially. The location where the permeation function F is provided is not particularly limited, and for example, a mode in which the permeation function F is provided downward from a predetermined intermediate height position of the water channel 1A can be considered.

  By the way, depending on the length of the groove for the side groove and the length of the penetration side groove 1 inserted in the groove for the side groove, the number of penetration side grooves 1 necessary for the groove for the side groove varies. That is, when the length of the permeation side groove 1 is shorter than the length of the side groove groove, a plurality of permeation side grooves 1 are added and inserted into one side groove groove.

  The trench insertion step is a step of inserting the permeation trench 2 into the trench groove excavated by the trench groove excavation step. The form of the trench 2 to be inserted is provided with a hollow path 2A penetrating in the length direction in a rectangular concrete block. The trench 2 has a required length, width and height, and is provided with a permeation function F at least partially. There is no particular limitation on the location where the permeation function F is provided. For example, a mode in which the permeation function F is provided on the entire trench 2 or the permeation function F is provided downward from a predetermined intermediate height position of the hollow path 2A can be considered. .

  By the way, the number of penetration trenches 2 required for the trench groove differs depending on the length of the trench groove and the length of the penetration trench 2 inserted in the trench groove. That is, when the length of the permeation trench 2 is shorter than the length of the trench groove, a plurality of permeation trenches are added and inserted into one trench groove.

  A connection process is a process of connecting the butt | matching location of the osmosis | permeation side groove | channel 1 and the osmosis | permeation trench 2 which were inserted by the said side groove insertion process and a trench insertion process. At the time of connection, as shown in FIG. 5A, water W flowing through the hollow channel 2A of the infiltration trench 2 permeates and flows down from the side wall of the infiltration side groove 1 having the infiltration function F into the water channel 1A of the side groove 1. However, it is sufficient to connect the end face of the infiltration trench 2 to the outer surface of the side wall of the infiltration side groove 1 as it is, but in order to ensure a smooth flow, as shown in FIG. A mode in which a through hole to the water channel 1A is provided on the side wall is also possible.

  At this time, a mode in which a connecting rod 3 is installed at the abutting portion between the permeation side groove 1 and the permeation trench 2 is also conceivable. That is, since the above-described aspect in which the through-hole is provided in the side wall of the permeation side groove 1 is troublesome and cumbersome in work, a smooth flow of water W from the hollow path 2A of the permeation trench 2 into the water path 1A of the permeation side groove 1 In order to secure and facilitate the connection between the permeation side groove 1 and the permeation trench 2, it is desirable to install a connection rod 3 at the abutting point.

  The form of the connecting rod 3 is not particularly limited, and a commonly used connecting rod 3 may be used, but it is preferable that at least a part of the penetration structure F is provided. There is no particular limitation on the location where the permeation structure F is provided, and for example, an aspect in which the entire connecting rod 3 is the permeation structure F, or only the lower part from the predetermined intermediate height position can be considered.

  The side groove embedding step is a step of refilling the periphery of the permeation side groove 1 inserted in the side groove groove by the side groove inserting step. At this time, due to the function of the buried side groove 1, all of the permeation side groove 1 is not buried in the ground G, but is buried so that its upper surface is exposed to the ground.

  The trench embedding process is a process of refilling the periphery of the permeation trench 2 inserted in the trench groove by the trench inserting process. At this time, due to the function of the trench 2 to be buried, all of the penetration trench 2 is buried in the ground G and is buried back so that there is no exposed portion on the ground.

  About the ground construction method around the building H according to the present embodiment constructed through the above steps, next, the effect of the groundwater inundation caused by the groundwater W that causes the liquefaction, that is, the groundwater W that causes liquefaction, The flow will be described.

  As shown in FIG. 4, when the groundwater W is submerged due to an earthquake or the like, the groundwater W enters the hollow channel 2 </ b> A of the infiltration trench 2 embedded in the underground G around the building H. It becomes. That is, since part or all of the infiltration trench 2 is provided with the infiltration function F, the infiltration function F allows the groundwater W to enter the hollow path 2A. Then, the groundwater W that has entered the hollow path 2A flows in the direction of the side groove 1 through the hollow path 2A.

  The groundwater W flowing down in the hollow channel 2 </ b> A in the direction of the side groove 1 then flows into the water channel 1 </ b> A of the permeation side channel 1. At this time, when the connecting rod 3 is installed, the groundwater W once flows into the connecting rod 3 and then flows into the water channel 1A of the infiltration side groove 1. The groundwater W that has flowed into the water channel 1A and the connecting rod 3 of the infiltration side groove 1 is accumulated in the water channel 1A or the connecting rod 3, or flows down in a predetermined direction through the water channel 1A.

  Since the infiltration side groove 1 has the infiltration function F, the groundwater flowing into the water channel 1A is finally infiltrated again into another underground G around the side groove 1 through the infiltration function F. At this time, if the connection rod 3 is provided with the seepage structure F, the groundwater that has flowed into the connection rod 3 is again permeated into the ground G around the connection rod 3 via the parent structure. It becomes.

  The flow of groundwater in the ground construction method around the building according to the present embodiment is as described above. When ground inundation occurs due to groundwater that causes liquefaction, the groundwater is efficiently discharged from the underground G. By letting it escape, the occurrence of the liquefaction phenomenon of the ground G is prevented in advance, and the groundwater that has flowed out is permeated again into the underground G, thereby allowing groundwater to be reduced underground.

6 and 7 show a second embodiment of the ground construction method around the building H according to the present invention, FIG. 6 is a flowchart, and FIG. 7 is an enlarged view of a main part.
As shown in FIG. 6, the ground construction method around the building H according to the present embodiment includes a groove excavation step for a side groove, a trench groove excavation step, a crushed stone laying step, a side groove insertion step, and a trench insertion step. And a connecting step, a side groove burying step, and a trench burying step. That is, this embodiment is provided with a crushed stone laying step as a pre-process of the side groove inserting step in the first embodiment, and each step other than the crushed stone laying step is the same as the first embodiment. The description is omitted because it is similar.

  The crushed stone laying step is provided as a pre-process of the side groove inserting step, and is a step of laying the crushed stone 4 in the side groove groove excavated by the side groove groove excavating step. Although there is no limitation in particular about the form of the crushed stone 4 laid, for example, a single grain crushed stone is used. In addition, the concrete laying place of the crushed stone 4 is laid so that the crushed stone 4 is located under the infiltration side groove 1 inserted in the side groove insertion step and on three sides or either side of the side.

  In addition, when employ | adopting the aspect which installs the connecting rod 3 in the butt | matching location of the infiltration side groove | channel 1 and the infiltration trench 2, the aspect which lays the crushed stone 4 also around this connecting rod 3 can be taken.

  In the present embodiment, by providing such a crushed stone laying step, when the groundwater flowing into the water channel 1A of the infiltration side groove 1 is again infiltrated into the underground G, the infiltration speed of the groundwater is improved, and It becomes possible to prevent softening of the soil and further prevent the lateral grooves 1 from floating due to water pressure when the ground inundation that causes liquefaction occurs.

  In performing the crushed stone laying step, a mode in which a water-permeable sheet is previously laid on the side surface excluding the bottom surface of the groove for the side groove can be considered. By laying such a water-permeable sheet, it is possible to prevent the surrounding soil from entering the gaps between the crushed stones 4 laid, and this contributes to prevention of clogging of the crushed stones 4.

  Regarding the flow of groundwater in the ground construction method around the building H according to the present embodiment, when the groundwater that has flowed into the water channel 1A of the infiltration side ditch 1 is finally re-infiltrated into another underground G around the ditch 1 This is the same as the first embodiment except that the underground penetration is made through the laid crushed stone four layers. According to the present embodiment, the infiltration speed when the groundwater that has flowed out is again infiltrated into the underground G is improved, which contributes to the improvement of the underground water reduction efficiency.

  The infiltration side groove 1 and the ground construction method around the building using the infiltration side groove 1 according to the present invention are, for example, when ground inundation occurs due to groundwater that causes liquefaction in the underground G. It is possible to prevent the occurrence of the liquefaction phenomenon of the ground G by allowing it to flow out efficiently from the G and to prevent the liquefaction phenomenon of the ground G from occurring. It is intended to re-penetrate into G, and the industrial applicability of the present invention is great.

DESCRIPTION OF SYMBOLS 1 Permeation side groove 1A Water channel 1B Side groove main body 1a Approximate U-shaped water channel 1b Hollow path 2 Permeation trench 2A Hollow path 3 Connection rod 4 Crushed stone 5 Permeable sheet F Permeation concrete (penetration function, permeation structure)
H Building G Ground (Underground)
W Groundwater (water)

Claims (7)

  A side groove having water permeability and having a required length, width, and height formed by concrete as a whole, a substantially U-shaped water channel having an open top is formed in the upper portion, and a lower portion. A permeation side groove characterized in that a hollow passage that penetrates in the lengthwise direction is formed, and part or all of the region below the predetermined height position is made of water-permeable concrete.   In the permeation side groove, the region below the predetermined height position constituting the permeable concrete is a region below the intermediate position between the substantially U-shaped water channel formed in the upper part and the hollow channel formed in the lower part. The permeation side groove according to claim 1.   In the permeation side groove, a region below a predetermined height position constituting the water-permeable concrete is a region below a predetermined intermediate height position in a substantially U-shaped water channel formed in an upper portion. Infiltration side groove as described. A ground construction method around the building,
Side gutter excavation process for excavating a gutter for the side gutter having the required length, width, and depth for embedding the permeation gutter into the front ground of the building
A trench groove excavation step of excavating a trench groove having a required length, width, and depth for embedding the infiltration trench from the side groove groove toward the surrounding ground of the building;
A side groove insertion step of inserting a plurality of permeation side grooves having a required length, width, and height and having a permeation function at least partially in the side groove groove excavated by the side groove groove excavation step;
A trench insertion step of inserting a plurality of permeation trenches having a required length, width and height in the trench groove excavated by the trench groove excavation step and having a permeation function at least in part;
A connecting step of connecting a butting portion of the permeation side groove and the permeation trench inserted by the side groove insertion step and the trench insertion step;
A side groove embedding step of refilling the periphery of the permeation side groove inserted in the side groove groove by the side groove inserting step;
A trench embedding step for refilling the periphery of the permeation trench inserted in the trench groove by the trench insertion step;
The ground construction method around the building, characterized by comprising In the ground construction method around the building,
The ground construction method around a building according to claim 4, comprising a crushed stone laying step for laying crushed stone in the groove for the side groove as a pre-process of the side groove inserting step. In the ground construction method around the building,
The ground construction method around a building according to claim 4 or 5, wherein a connecting rod is installed at a location where the permeation side groove and the permeation trench meet in the connection step. In the ground construction method around the building,
The ground construction method around a building according to claim 6, wherein the connecting rod is provided with a seepage structure.