JP5182818B2 - Embankment - Google Patents

Description

  The present invention relates to an embankment installed mainly on a coast.

  In recent years, there have been a series of situations where coastal dikes and revetments that were built in the Showa 30s and 40s have been damaged by typhoons and winds in recent years.

  When these dikes (coast dikes, revetments) are restored or newly constructed, plywood formwork has been installed so that a predetermined wall thickness can be secured on the offshore side and on the land side (formwork) Then, deformed reinforcing bars are assembled in it (reinforcement work), ready-mixed concrete is cast in (concrete work), and this is sequentially repeated to construct in the extension direction and the upward direction.

  Such a conventional construction method is generally used in coastal construction even in the present situation, and requires a very long construction period due to the large number of work types. In addition, the progress of construction and the safety of workers are likely to be affected by sea conditions such as weather and waves, and it usually takes a construction period of about one year compared to construction in inland areas.

  Furthermore, in order to carry out the above construction method, in order to prevent the invasion of waves and the worker can safely proceed with the construction, temporary deadlines and drainage works with steel sheet piles must be constructed in advance on the sea side. In many cases, apart from the construction of the main body, there was a problem of requiring a very large amount of temporary construction costs.

  The present invention has been made in view of the above, and at a construction site such as a beach, without using a temporary formwork, that is, without requiring a formwork, a precast formwork can be used in a short time. The purpose is to provide an embankment that can be constructed.

  In order to achieve the above object, an embankment according to the present invention comprises a front block provided with a retaining leg on the rear side of the front plate and a rear block provided with a retaining leg on the rear side of the rear plate. Connect the front plate of the block to the offshore side and the back plate of the rear method block to the land side, and connect the two method blocks to the engaging part provided on the retaining leg of each method block Connected with blocks to form an assembly frame step, and at least one of the assembly frame steps is arranged side by side in the horizontal direction, and on the upper side of the uppermost assembly frame step, a corrugated plate whose front surface is concave in the vertical direction A baffle block with a back leg provided on the back side and a back panel fixed to the back side of the back leg is placed with the baffle plate facing the offshore side. The concrete is placed in the space of It was constructed in cast concrete.

  According to the present invention, at the construction site of the shore, there is no need for a temporary formwork using a temporary formwork, and therefore, plywood formwork installation and removal at the construction site and rebaring work by a reinforcing bar are not required, The coastal dike can be reasonably built, and the construction period of this type of dike can be greatly shortened. Further, as described above, by not requiring a temporary formwork, it is possible to improve the safety of the worker and reduce the overall construction cost including the temporary construction cost.

It is a partially broken side view which shows an example of the embankment which concerns on this invention. It is a partial front view of the said embankment. FIG. 3 is a cross-sectional view taken along line AA in FIG. 2. It is a front view of a former method block. It is a side view of a former method block. It is a top view of a former method block. It is a rear view of a former method block. It is a bottom view of a former method block. It is a front view of a post method block. It is a side view of a post method block. It is a top view of a post method block. It is a rear view of a post method block. It is a bottom view of a post method block. It is a front view of a connection block. It is a side view of a wave return block. It is a top view of a wave return block. It is a rear view of a wave return block. It is a front view of a back panel. It is a disassembled perspective view which shows the other examples of the connection structure of a front method block and a back method block.

  1 to 3 show an example of a dike according to the present invention. FIG. 1 is a partially broken side view, FIG. 2 is a front view showing a part thereof, and FIG. FIG.

  In FIG. 1, a dike 1 has a plurality of, for example, three assembly frame steps 2a, 2b, and 2c stacked, and a wave return block 3 is stacked above the uppermost assembly frame step 2c. In addition to the arrangement, the concrete 4 is placed in each block.

  The assembly frame steps 2a to 2c are different in length from the front method block 5 and the rear method block 6 that are spaced apart from each other in the front-rear direction. It consists of connecting blocks 7a, 7b, 7c that connect the blocks 6. The above-mentioned former method block 5 and latter method block 6 are the same for each stage. Both blocks 5 and 6 have the same width.

  4 to 8 are front views, FIG. 5 is a side view, FIG. 6 is a plan view, FIG. 7 is a rear view, and FIG. 8 is a bottom view.

  The front block 5 includes a front plate 8, back legs 9 a and 9 b provided on the rear side of the front plate 8 and at approximately 1/4 of the lateral length from both lateral ends. Projections 10a and 10b provided in parallel with the front plate 8 are integrally formed on the laterally outer sides of the holding legs 9a and 9b. In the front block 5, the front plate 8 and the holding legs 9a, 9b are inclined so that the upper ends thereof are retracted with respect to the lower ends, and the upper and lower ends of both holding legs 9a, 9b are arranged on the front plate 8. It is horizontal from the upper and lower ends. A recess 11 is provided at the lower end of each retainer leg 9a, 9b, and a protrusion 12 shaped to engage with the recess 11 is provided at the upper end.

  The post-method block 6 is configured as shown in FIGS. 9 to 13. FIG. 9 is a front view, FIG. 10 is a side view, FIG. 11 is a plan view, FIG. 12 is a rear view, and FIG.

  The rear method block 6 includes a back plate 13, back legs 14 a and 14 b provided on the rear side of the back plate 13 and at approximately 1/4 of the lateral length from both lateral ends. The protrusions 15a and 15b provided in parallel with the back plate 13 are formed integrally with the legs 14a and 14b in the lateral direction. The rear block 6 has the same height as the previous block 5 and is substantially vertical. Both the upper and lower ends of the holding legs 14a and 14b are horizontal from the upper and lower ends of the rear plate 12. Yes. A recess 16 is provided at the lower end of each of the retainer legs 14a and 14b, and a protrusion 17 having a shape engaging with the recess 16 is provided at the upper end.

  By stacking the front block 5 in each step with the front plate 8 facing forward, a front wall inclined to the rear side is formed by the front plate 8 of each front block 5. In addition, the rear wall is formed by the back plate 13 of each post-method block 6 by stacking the post-method block 6 in each step with the back plate 13 facing rearward.

  The distance between the front method block 5 and the rear method block 6 at each stage is narrower toward the upper stage in accordance with the inclination of the previous method block 5, so that the bumps provided on the holding legs 9a, 9b of the special method block 5 are marked. The interval between the protrusions 15a, 15b provided on the strips 10a, 10b and the holding legs 14a, 14b of the rear block 6 becomes shorter in order from the lower side.

  The connecting blocks 7a, 7b, 7c are configured as shown in FIG. 14, and are engaged with the protrusions 10a, 10b of the front block 5 and the protrusions 15a, 15b of the rear block 6 on the lower surfaces of both ends. Joint grooves 18a and 18b are provided. The length of each of the connecting blocks 7a to 7c and the interval between the engaging grooves 18a and 18b are as shown in FIG. 1 in the interval between the protrusions of the front method block 5 and the rear method block 6 in each of the assembly frame steps 2a to 2c. It is formed together. That is, the connecting blocks 7a to 7c are prepared so as to be engaged with the two ridges 10a, 10b, 15a, and 15b in each stage.

  FIG. 15 is a side view, FIG. 16 is a plan view, and FIG. 17 is a rear view.

  The wave return block 3 has a wave return plate 19 formed in a concave shape upward from the lower end on the front side, and a position on the back side of the wave return plate 19 and 1/4 of the lateral length from both lateral ends. Are provided with the holding legs 20a and 20b. The wave return block 3 has the same width as the preceding and following modulo blocks 5 and 6. Therefore, the positions of the holding legs 20 a and 20 b of the wave return block 13 are also the same positions as those of both blocks 5 and 6. . On the lower end surface of each of the retaining legs 20a, 20b, there is provided a recess 21 having a shape in which the upper protrusions 11, 17 of the front method block 5 and the rear method block 6 are engaged in the front-rear direction.

  As shown in FIG. 1, the wave return block 3 is an example in which the wave return block 3 is stacked on the upper side of the third assembly frame step 2c. The size is adjusted to the size of the upper end of the eye assembly frame step 2c. That is, the front lower end of the wave return plate 19 of the wave return block 3 coincides with the upper front end of the front plate 8 of the uppermost assembly frame step 2c, and the gradient of the wave return plate 19 of the wave return block 3 is the uppermost step. It is made to continue with the gradient of the front plate of the assembly frame step 2c.

  The back surfaces of the holding legs 20a, 20b of the wave return block 3 are bent in the vertical direction, and back panels 21a, 21b, 21c having the same width as the wave return plate 19 are fixed to the respective straight portions. Yes. The rear panel is fixed by a stainless steel bolt that is screwed into a stainless steel nut member 22 inserted into the holding legs 20a and 20b. The rear panels 21a to 21c are, for example, as shown in FIG. 18, and the width in the vertical direction of the rear panels 21a to 21c is prepared in accordance with the length of the bent lines of the holding legs 20a and 20b of the wave return plate 19. Keep it.

  Each of the wave return block 3, the previous method block 5, the subsequent method block 6, the connecting blocks 7a, 7b, and 7c, and the rear panels 21a, 21b, and 21c in the above configuration is made of precast concrete that is molded in advance at the factory. ing.

  Next, the embankment building process according to the present invention will be described.

  For example, on the base 23 provided on the coast, the front method block 5 and the rear method block 6 are directed with the front plate 8 of the front method block 5 facing offshore and the back plate 13 of the rear method block 6 facing the land side. It is installed so as to face each other at a predetermined interval, and the connecting blocks 7a are engaged with the protrusions 10a, 10b, 15a, 15b of the blocks 5, 6 to connect the blocks 5, 6 in the front-rear direction. The assembly frame step 2a of the step is assumed. Then, the first assembly frame step 2a is arranged side by side over a predetermined length along the coast. At this time, the interval between the front and rear modulo blocks 5 and 6 is determined by the length of the connecting block 7a used in the first stage. As shown in FIG. 3, the connecting block 7a is engaged across the ridges 10a, 10b, 15a and 15b of the mutually adjacent legal blocks, thereby reducing the number of connecting blocks 7a used. be able to.

  The ready-mixed concrete is placed in the space between the two method blocks 5 and 6 of the first assembly frame step 2a assembled as described above up to about ½ of the height thereof.

  Then, the second front method block 5 is provided above the first assembly frame step 2a and over the entire length in the lateral direction above the front method block 5, and the first method post block 6 is provided. The second-stage post-method block 6 is stacked on the upper side of each of the two, and the front and rear method blocks 5 and 6 are connected in the front-rear direction by the second-stage connection block 7b in the same manner as the first step. The eye assembly frame step 2b is stacked.

  At this time, each method block stacked up and down is engaged with the projections 12 and 17 provided on the upper surface and 11 and 16 provided on the lower surface, and each upper and lower method block is engaged in the front-rear direction. Stacked in.

  Next, in a state where the second assembly frame step 2b is assembled as described above, ready-mixed concrete is placed from the upper side of the second step to a position approximately half of this step.

  Similarly, the third assembly frame step 2c is constructed by stacking the respective method blocks 5 and 6 and connecting the front and rear method blocks 5 and 6 in the front-rear direction by the third step connection block 7c, and then the above-mentioned 3 Ready-mixed concrete is laid from the upper side of the step to a position approximately half of this.

  The interval between the front and rear method blocks 5 and 6 of the assembly frame steps 2a to 2c of each step assembled as described above changes according to the inclination of the previous method block 5, and therefore the connection blocks 7a to 7c of each step are , Use one that fits each stage.

  The return block 3 is stacked on the upper surface of the uppermost (third) assembly frame step 2c over the entire length in the lateral direction. At this time, the concave portion 21 provided on the lower surface of each wave return block 3 is engaged with the protrusions 12 and 17 of the front and rear method blocks 5 and 6 of the assembly frame step 2c to be coupled in the front-rear direction.

  Thereafter, rear panels 21 a to 21 c shown in FIG. 18 are attached to the back of each wave return block 3. The dyke construction is completed by placing ready-mixed concrete up to the upper end in the space between the back panels 21a to 21c and the wave return plate 19. At this time, reinforcing bars may be provided in the placement space as necessary when placing the ready-mixed concrete.

  In the above-described embodiment, an example in which the assembly frame steps 2a, 2b, and 2c are stacked in three steps has been described, but this may be two steps, four steps, or one step. The wave return block 3 is prepared in accordance with the interval between the front method block 5 and the rear method block 6 at the upper end of the assembly frame stage.

  Further, the connecting structure of the both method blocks 5 and 6 by the connecting blocks 7a, 7b and 7c is not based on the above-mentioned protrusions 10a, 10b, 15a and 15b, but as shown in FIG. Grooves 24, 24 are provided on the outer surfaces of the holding legs 9a ', 9b', 14a ', 14b' of the block 6, and the connecting blocks 7a ', 7b', which have projections 25, 25 at both ends thereof. Both method blocks 5 and 6 may be connected in the front-rear direction by engaging 7c '. In short, any structure may be used as long as the constraining legs of the front and rear method blocks 5 and 6 are connected in the front-rear direction by the connection block.

  DESCRIPTION OF SYMBOLS 1 ... Levee, 2a, 2b, 2c ... Assembly frame stage, 3 ... Wave return block, 4 ... Concrete, 5 ... Front method block, 6 ... Back method block, 7a, 7b, 7c, 7a ', 7b', 7c ' ... Connecting block, 8 ... Front plate, 9a, 9b, 14a, 14b, 9a ', 9b', 14a ', 14b', 20a, 20b ... Retaining leg, 10a, 10b, 15a, 15b ... Projection, 11, 16 , 21 ... recess, 12, 17 ... projection, 13 ... back plate, 18a, 18b ... engagement groove, 19 ... wave return plate, 21a, 21b, 21c ... back panel, 22 ... nut member, 23 ... base, 24 ... groove, 25 ... protrusion.

Claims (1)

The front block that has a front leg on the back side of the front plate and the rear method block that has a back leg on the back side of the back plate are placed with the front plate of the front block facing offshore and the back of the rear block. The face plates face each other toward the land side, and the two method blocks are connected to each other by a connecting block that engages with an engaging portion provided on a retaining leg of each method block to form an assembly frame step.
Install at least one of these assembly frame steps side by side,
Above the top assembly frame,
A baffle block is provided on the back side of the wave return plate whose front surface is concaved in the vertical direction, and a wave return block with the back panel fixed to the back side of the baffle leg is directed to the offshore side. Placed,
Placing ready-mixed concrete in the space of the assembly frame step and wave return block,
An embankment characterized in that each of the above members is made of precast concrete.

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