JP3564568B2 - Water purification structure of steel sheet pile revetment - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention provides a water purification structure provided for performing water purification by forming submerged unevenness on the river surface side of a steel sheet pile revetment when the river revetment is formed by driving steel sheet piles in a continuous state. About.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a technique of forming a seawall of a river with steel sheet piles and installing a water purification structure on the river surface side of the steel sheet pile seawall is described in, for example, JP-A-3-60800, JP-A-4-49307, and the like. Belongs to.
The revetment facility for seawall water disclosed in the above-mentioned Japanese Patent Application Laid-Open No. Hei 3-60800 has a water intake tank provided with an intake port and an air lift pump on the river surface side of a steel sheet pile revetment, and a lower part communicating with the water intake tank. And an aeration tank provided with an aeration tube at the bottom, and an aeration tank connected at the top with the aeration tank, and a conveyor-type sludge scraper provided at the bottom, and a sludge pool on the outlet side of the scraper. And a means for discharging sludge from the sludge pool, and a sedimentation tank provided with an outlet for purified water.
[0003]
In addition, the seawall structure disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 4-49307 is a double cutoff in which another steel sheet pile embankment is provided in parallel on the river surface further than the steel sheet pile embankment to provide a terrace seawall. A purifying device that forms a staircase revetment, takes in and purifies river water and returns it to the river again is buried in the terrace revetment. There is also disclosed a technique in which a seawall of a river is formed by steel sheet piles, and a block is attached to the river surface side of the steel sheet pile seawall to break waves and construct a fish nest.
[0004]
Further, in the block for earth retaining work disclosed in the above-mentioned JP-A-6-108481, a so-called T-shaped steel is arranged on a river face side of a steel sheet pile revetment in parallel with each other in a vertical direction at an interval equal to the width of the block. Then, the T-section steel web is joined to the steel sheet pile by continuous fillet welding, and the two ends of the earth retaining installation block are fitted and dropped into the U-shaped grooves formed by the T-section steel on both sides. It is installed by.
[0005]
[Problems to be solved by the present invention]
The conventional water purification structure of the steel sheet pile revetment disclosed in the above-mentioned Japanese Patent Application Laid-Open Nos. Hei 3-60800 and Hei 4-49307 has a complicated structure of the water purification structure irrespective of the water purification function. The construction is not easy, and the beauty of the revetment is not considered so much. Further, even if the purifying material or the purifying device is deteriorated, the replacement operation is extremely difficult.
[0006]
Next, the technology described in Japanese Patent Application Laid-Open No. 6-108481 is aimed at wave-dissipation, fish nests, etc., and is not aesthetically pleasing, but is difficult to install and can be used as a water purification structure. Not suitable. In other words, if the T-section steel is to be attached after the revetment work, the entire surface will be welded underwater, which is inevitably impossible in light of the current welding technology. Therefore, at the place where the earth retaining work mounting block is to be installed, a T-section steel must be welded in advance on land to one side of the steel sheet pile at the corresponding position at the time of construction of the steel sheet pile revetment. Unless otherwise, it is almost impossible to plan and construct the earth retaining block installation after the revetment work. In addition, in order to fit the earth retaining attachment block into the U-shaped groove formed by the T-section steel, it is necessary to suspend the block using a heavy machine such as a crane. Therefore, when the water purifying material is loaded inside the earth retaining work mounting block, the water purifying material is replaced, or when dredging down the riverbed, etc., a heavy machine such as a crane is also used. It is necessary to lift the earth retaining work mounting block and remove it, which increases the cost of using heavy equipment and is troublesome.
[0007]
Therefore, an object of the present invention is to make it possible to install a structure for water purification on a steel sheet pile revetment as easily as possible, and to provide a revetment excellent in aesthetics without impairing the natural scenery. Yes, and furthermore, it is possible to install it at any time, and it has been improved to a structure that can easily perform the work of putting in and out the water purification material, replacing it, and dredging the riverbed without the need for heavy equipment. It is an object of the present invention to provide a water purification structure for a seawall.
[0008]
[Means for Solving the Problems]
As a means for solving the above-mentioned problems, a water purification structure of a steel sheet pile revetment according to the invention of claim 1 has stud bolts attached to the river surface side of a revetment formed by driving steel sheet piles in a continuous state, Both ends of a water flow frame in which a stirruped support frame is installed in the lateral direction on the river surface side of the seawall using the stud bolts, and a planar shape has a convex shape protruding to the river surface side and water holes are provided on the wall surface. The part is attached to the support frame by a vertical pin connection structure, and a water purification material is loaded inside the cavity of the water flow frame.
[0009]
According to a second aspect of the present invention, stud bolts are attached in a plurality of rows above and below the river surface of a seawall formed by driving steel sheet piles in a continuous state, and the stud bolts are used to lay sideways of the seawall along the river surface. The support frame in the direction of bulging in the direction is installed in a plurality of stages up and down, the flat shape is curved so that it protrudes to the river surface side, and the water flow port is provided on almost the entire surface of the wall. A water purification material is mounted inside the cavity of the water flow frame by being vertically attached to the support frame which is installed in a plurality of stages vertically.
[0010]
According to a third aspect of the present invention, the water flow frame according to the first or second aspect is provided at each end thereof with a concave notch having a size and a shape into which the support frame of each step fits. A bolt through-hole and a nut sleeve are provided vertically in a vertical direction at a position corresponding to the bolt through-hole of the support frame fitted in the concave notch, and a bolt is commonly passed through each of the bolt through-holes to pass through the nut sleeve. It is characterized by being screwed and tightened for installation.
[0011]
According to a fourth aspect of the present invention, the vertical axis portion of the connector having a U-shape as viewed in the vertical direction penetrates vertically through the support frame installed in a plurality of stages vertically as described in the first or second aspect. It is installed rotatably in a state where it has been made, and the upper and lower horizontal arms of the connecting tool are passed through the bolt holes of the box-shaped receiving portions provided above and below the water flow frame, and the nut is fastened and attached. It is characterized by.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
The present invention is carried out on the premise of steel sheet pile revetment. In addition to designing and constructing a water purification structure when constructing a steel sheet pile revetment, it is easy to plan and construct the revetment as needed, even in the service state after construction. This is because even if the mounting of the stud bolts is underwater welding, it is not difficult in the light of the current welding technology.
[0013]
The present invention provides a method for installing a supporting frame having a length necessary for mounting a water-permeable frame by using stud bolts in a lateral direction on a river surface side of a steel sheet pile revetment, and attaching the water-permeable frame to the supporting frame. Will be implemented. Although the support frame may be provided in one stage, it is preferable to perform the support frame in at least two upper and lower stages in order to secure the stability and reliability of the installation state of the water flow frame.
The water passage frame is manufactured and implemented with a reinforced concrete product or a steel structure product or other materials. The plane shape of the water flow frame should be convex, such as semicircular, angular, triangular, or polygonal, on the river surface side of the steel sheet pile revetment so as to form a cavity suitable for loading the water purification material. In addition, a vertical or horizontal slit-shaped or hole-shaped water passage (opening) is provided on the wall surface. The water flowing through the river enters the cavity from the opening of the water flow frame and is purified by flowing while contacting the water purification material.
[0014]
Both ends of the water flow frame are attached to the support frame by a vertical pin connection structure. Therefore, even if it is installed in a river in a submerged state and receives a larger water pressure and flow resistance than expected due to increased water or other causes, it is possible to secure the stability and reliability of the mounting state of the water flow frame. Then, when the water purification material loaded in the cavity of the water passage frame is to be replaced when the water purification material is deteriorated, or when the dredging work such as sludge accumulated on the riverbed is performed, by removing the pin connection structure at one end, Using the pin connection structure at the other end as a hinge, the water flow frame can be rotated (opened / closed) as a manual operation by a person, and no heavy equipment is required.
[0015]
The water flow frame is arranged to form irregularities continuously or to be discontinuous in the longitudinal direction (flow direction of water) on the river surface side of the steel structure seawall of the river, that is, along the longitudinal direction of the support frame. Installed in In addition, when the water-flowing frame is a concrete product, the above-mentioned uneven pattern is decorated on the wall surface on the river surface side by using a special pattern formwork having irregularities such as a stone wall pattern or a rock face pattern for the formwork. In the case of a steel structure product, a decorative panel expressing the same pattern as described above is attached to the wall surface on the river surface side to enhance the natural scenery and beauty of the revetment. In other words, the layout is designed and implemented to enhance the natural scenery of the revetment and to be suitable for the water purification action (the flow of water passing through the water purification material in the cavity).
[0016]
【Example】
Next, illustrated embodiments of the present invention will be described.
Fig. 1 shows two rows of stud bolts 2 installed horizontally at a pitch of about 60cm in the horizontal and vertical arrangement on the river side of the steel sheet pile revetment formed by steel sheet piles 1 driven continuously along the riverbank. The stage in which the stud bolt 2 is used to install a support frame 3 in the form of a barb in the lateral direction on the river surface side of the steel sheet pile revetment is shown. As shown in FIG. 5, the water flow frame is installed at a level substantially submerged. Inevitably, the support frame 3 is also installed in water, but the stud bolt 2 is attached to the steel sheet pile by welding using a well-known underwater welding method. The supporting frame 3 of the present embodiment shown in FIG. 1 and the subsequent figures is composed of a plurality of connecting plates 3c in which two channel steels 3a and 3b are combined in parallel with facing each other, and arranged at appropriate intervals in the longitudinal direction between them. As an assembly material joined by a method such as welding. The support frame 3 is firmly attached to the steel sheet pile revetment through the stud bolt 2 in the middle of the two channel steels 3a and 3b, and the nut 5 is screwed from the outside to the stud bolt 2 via the washer 4 and fastened. Mounting has been performed. In addition, in the longitudinal direction of the center of the web of the two channel steels 3a, 3b constituting the support frame 3, a suitable interval for attaching both ends of the water flow frame with vertical bolts, for example, at an interval of 120 cm, as an example. A plurality of bolt through holes 6 whose centers coincide with each other are provided.
[0017]
Next, FIG. 2 shows a manner in which both ends of the water flow frame 7 are attached to the above-described upper and lower support frames 3 and 3 by a vertical pin connection structure. The water flow frame 7 of the present embodiment is a precast product made of reinforced concrete, and as shown in FIGS. 3 and 4, is formed as a convex shape having a semicircular curved plane shape from the seawall to the river surface side. On the wall surface, a plurality of slit-shaped water holes 8 long in the longitudinal direction are provided uniformly over the entire surface. As shown in FIG. 2, rectangular recesses 9 each having a size such that the two-stage support frames 3, 3 are fitted almost exactly at both ends of the water passage frame 7. , 9 are provided, and a rectangular work recess 10 is also provided in the middle part. A bolt through hole 11 is penetrated by embedding a metal sleeve in the upper part of the concave notch 9, and a metal nut sleeve 12 is buried in the lower part by vertically aligning the center with the bolt through hole 11. Screw holes 13 are provided. Therefore, as shown in FIGS. 3 and 5, the mounting operation of the water-flowing frame 7 is performed by fitting the upper and lower concave notches 9 and 9 into the upper and lower two-stage supporting frames 3, 3 of the steel sheet pile revetment. The center of the bolt passage hole 6 of the support frame 3 and the center of the bolt passage hole 11 of the water passage frame 7 are aligned, and the through bolt 14 having a sufficient length is directed vertically downward into a series of bolt passage holes 11 and 6. And the screw portion 14a at the tip thereof is screwed into the screw hole 13 of the nut sleeve and securely fastened, thereby achieving a strong attachment with a vertical pin connection structure. The work recess 10 in the intermediate portion is effectively used at the time of bolting work to the lower support frame 3.
[0018]
However, as in the embodiment shown in FIG. 6, at the end of the water flow frame 7, only the concave notches 9, 9 in which the support frame 3 is fitted at two upper and lower positions are provided, and no working concave is provided. A series of bolt through holes 11 penetrating up to the concave notch 9 are provided, and a nut sleeve 12 is embedded only in the lower portion of the lower concave notch 9 so that the center of the nut sleeve 12 is vertically aligned with the bolt through hole 11. The same applies to the configuration in which the screw holes 13 are provided. In the case of the present embodiment, one through-bolt 14 having a length equivalent to the vertical length of the water-passage frame 7 is successively arranged in the order of the bolt through-holes 11, 6, 11, and 6 downward from above. Then, the nut is finally screwed into the screw hole 13 of the nut sleeve 12 and fastened, whereby the mounting is performed by the vertical pin connection structure.
[0019]
In the case of the present invention, mounting (installation work) of the water flow frame 7 is performed by suspending the water flow frame with a crane or the like and bolting both ends of the water flow frame at the same time. Procedures can be implemented. This is because, when one end of the water flow frame 7 is bolted, it serves as a hinge because of the vertical pin connection structure, and the water flow frame 7 can be rotated (opened / closed) around the through bolt 14. . Therefore, even after the hanging state by the crane is released, the mounting operation by bolting the other end can be performed without any trouble, and the operation efficiency of the heavy equipment can be increased.
[0020]
As shown in FIG. 3, the water-permeable frame 7 is attached to the steel sheet pile revetment in a manner that it is installed in approximately every other discontinuous convex shape, as well as the required water purification conditions and the steel sheet pile revetment. Due to natural scenery, aesthetic considerations, and other reasons, they are installed in an arrangement in which concavities and convexities are continuously formed, or in an arrangement in which groups of concavities and convexities are partially formed. Furthermore, if necessary, the wall surface on the river surface side of the water flow frame is decorated with a stone wall pattern or an uneven pattern such as a rock surface pattern, or a decorative panel expressing the same pattern as described above is attached to the wall surface on the river surface side, and the nature of the seawall is provided. Enhancing the natural scenery and aesthetics is also implemented. Then, the water purification material 15 is loaded into the cavity of each of the water flow frames 7 installed as described above (see FIG. 4). The water-purifying material 15 may be a material obtained by incinerating stone blocks or shells, or a material obtained by cutting old tires into chips, depending on the content and degree of the target water purification, a wire mesh or a synthetic resin (geotextile). It is loaded in a state of being stored in a bag formed by the above method. Therefore, it is also convenient to provide a bottom plate in the lower part of the cavity of the water flow frame 7 for the convenience of loading the water purification material 15.
[0021]
[Second embodiment]
In the embodiment shown in FIGS. 7 and 8, the water-flowing frame 7 is also attached to the upper and lower support frames 3 and 3 by a vertical pin connection structure. This figure shows that a U-shaped connecting tool is used, and that the vertical axis of the connecting portion is located at a position protruding from the end face of the water flow frame 7. That is, a box-shaped receiving portion 17 in which a plurality of anchor reinforcing bars 16 are arranged as shown in FIG. 9 is integrally buried at two upper and lower positions on both end surfaces of the reinforced concrete water-permeable frame 7. . A bolt through hole 18 is provided in an end plate 19 of the box-shaped receiving portion 17, and a space 20 having a size that does not hinder the operation of fastening the nut is formed behind the bolt through hole 18. The end plate 19 is buried flush with the end face of the water flow frame 7. On the other hand, the bolt through-hole 6 at the corresponding position in the upper and lower two-stage support frames 3 and 3 has a slightly thicker shaft diameter and a horizontal arm 21 integrally bent at the upper end into an L shape. The shaft portion 22 is rotatably passed through, and a hole 24 into which the vertical portion 23 ′ of the lower horizontal arm portion 23, which is independently L-shaped, can be inserted is opened at the lower end of the vertical shaft portion 22. Therefore, the work of attaching the water-flowing frame 7 is performed in advance with respect to the horizontal arm portion 21 at the upper end of the vertical shaft portion 22 which is commonly passed in advance through the bolt through holes 6, 6 of the upper and lower two-stage support frames 3, 3. The upper bolt holes 18 on the end face of the water flow frame 7 suspended by a crane or the like are aligned, and the same arm portion 21 is passed through the hole 18. On the other hand, the lower side arm portion 23 is passed through the lower bolt through hole 18, and then the vertical portion 23 ′ of the same arm portion 23 is inserted into the hole 24 of the vertical shaft portion 22 to form a temporary fixing state, Subsequently, the nut 25 is screwed into the tip screw portions 21a and 23a of each lateral arm portion using the space 20 and firmly fastened, whereby a substantially vertical pin connection structure is mounted.
[0022]
[Third embodiment]
FIG. 10 shows an embodiment of the water frame 7 having a steel structure. The water flow frame 7 connects an upper frame 7a and a lower frame 7b, which are formed by bending a shaped steel material, with a steel square pipe 7c in the vertical direction, and a gap between the square pipes serves as a water flow port 8. Have been. In the case of this embodiment, the support frames 3 are provided at upper, middle, and lower stages at substantially equal intervals in the vertical direction. Correspondingly, a total of three pairs of upper and lower brackets 26 sandwiching the upper and lower sides of each support frame 3 are provided at both ends of the water flow frame 7. Then, the support frame 3 of each step and a pair of brackets 26 sandwiching the upper and lower sides thereof are fixed by a vertical pin shaft 27, so that a substantially vertical pin connection structure is mounted.
[0023]
[Effects of the Invention]
ADVANTAGE OF THE INVENTION The water purification structure of the steel sheet pile revetment according to the present invention can relatively easily attach and construct the water purification structure on the steel sheet pile revetment of the river, and is excellent in aesthetics and impairs the natural scenery of the river. Can be none. In particular, the water purification structure of the present invention can of course be constructed simultaneously with the construction of the steel sheet pile revetment, but can be easily retrofitted at any time after construction. In addition, the water purification structure uses the vertical pin connection structure at one end as a hinge to rotate the other end of the water flow frame to replace the water purification material or dredge work such as sludge on the river bottom. Even if there is no heavy equipment, it can be easily performed within the range of human power and is convenient.
[Brief description of the drawings]
FIG. 1 is a perspective view showing how to install a support frame on a steel sheet pile revetment.
FIG. 2 is a perspective view showing how to attach a water flow frame to a support frame.
FIG. 3 is a perspective view showing an attachment state of a water flow frame.
FIG. 4 is a plan view showing a state where a water flow frame is attached to a support frame.
FIG. 5 is a side view of a state where a water-flowing frame is attached to a support frame.
FIG. 6 is a perspective view showing how to attach a water flow frame having a different structure to the support frame.
FIG. 7 is a perspective view showing how to attach a water flow frame having a different structure to the support frame.
FIG. 8 is a side view of a state in which the water flow frame is attached to a support frame.
FIG. 9 is a perspective view showing a structure of a box-shaped receiving portion.
FIG. 10 is a side view showing an attached state of a steel structure water flow frame.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 steel sheet pile 2 stud bolt 3 support frame 8 water passage 7 water passage frame 15 water purification material 9 concave notch 11 bolt through hole 12 nut sleeve 14 through bolt 22 vertical shaft 21 lateral arm 23 lateral arm 17 box-shaped receiver Part 18 bolt hole 25 nut

Claims (4)

Stud bolts are attached to the river surface side of the revetment formed by driving steel sheet piles in a continuous state, and a staggered support frame is installed in the lateral direction on the river surface side of the revetment using the stud bolts, and the planar shape is Both ends of a water flow frame having a convex shape protruding toward the river surface side and a water flow port provided on a wall surface are attached to the support frame by a vertical pin connection structure, and a water purification material is provided inside the cavity of the water flow frame. A water purification structure for steel sheet pile revetment, characterized by being loaded. Stud bolts are mounted in multiple rows above and below the river surface of the revetment formed by driving steel sheet piles in a continuous state, and the stud bolts are used to support the revetment in the lateral direction on the river surface side. The support frame in which both ends of a water flow frame in which a frame is installed in a plurality of stages vertically and a plane shape is formed in a convex shape protruding to the river surface side and a water passage is provided on substantially the entire surface of the wall, and is vertically installed in a plurality of stages. A water purification structure for a steel sheet pile revetment, wherein the structure is attached by a pin connection structure perpendicular to the water flow passage, and a water purification material is loaded inside the cavity of the water flow frame. A recessed portion having a size and a shape for fitting the support frame of each step is provided at both ends of the water flow frame according to claim 1 or 2, and the support frame fitted in the recessed portion is provided. A bolt through hole and a nut sleeve are vertically provided at a position corresponding to the bolt through hole, and a bolt is commonly passed through each of the bolt through holes, screwed into the nut sleeve, tightened, and mounted. A water purification structure on a steel sheet pile revetment. A vertical axis portion of a connector having a U-shape as viewed in an elevation direction is rotatably installed in a vertically penetrated state on the support frame installed in a plurality of stages up and down according to claim 1, Water quality of steel sheet pile revetment, characterized in that upper and lower horizontal arms of the connecting tool are passed through bolt holes of box-shaped receiving portions provided above and below the water flow frame and fastened with nuts. Purification structure.

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