KR100789500B1 - A Construction method for reinforced earth wall and wall block - Google Patents

Abstract

The present invention is installed in the reinforcement insertion groove formed in the concrete block forming the retaining wall surface in the state in which the front end portion of the strip-shaped fiber reinforcement is folded in half width or multiple along the longitudinal direction, and the rear portion of the strip-shaped fiber reinforcement is embedded in the reinforcement soil reinforcement soil To support the front wall with the reinforcement, the front end of the strip-shaped fiber reinforcement is inserted into the reinforcement insertion groove formed in the plurality of lower blocks adjacent to the left and right at the same time, and the rear ends of both sides of the fiber reinforcement are placed in parallel on the reinforcement soil and installed On the lower block in which the fiber reinforcement material is inserted, a plurality of upper blocks are stacked to form a block unit so as to overlap with the lower block, and the stacked block units are stacked in a stacking manner to form a retaining wall surface.

Strip-shaped fiber reinforcement, retaining wall, prefabricated, laying interval, uniformity, rigidity, displacement prevention

Description

Construction method for reinforced wall retaining wall and retaining wall construction {A Construction method for reinforced earth wall and wall block}

1 is a perspective view of the front part showing the block construction state and the laying state of the grid-type reinforcement in the prefabricated retaining soil retaining wall according to the prior art,

Figure 2 is a side cross-sectional view of the prefabricated retaining soil retaining wall as shown in FIG.

3 is a view for explaining the deformation and breakage of the reinforcement when displacement of the front wall caused by unequal settlement;

Figure 4 is a perspective view of the back portion of the retaining wall showing the laying state of the strip-shaped fiber reinforcement according to the present invention of the present invention,

5 is a rear perspective view of the retaining wall schematically showing the construction of the prefabricated retaining soil retaining wall according to the present invention;

6 is a view for explaining a method for constructing a prefabricated retaining wall retaining wall according to the present invention, the separated perspective view showing a state in which the front end portion of the strip-shaped fiber reinforcement at the same time to the two lower blocks adjacent to the left and right,

7 is a perspective view showing a state in which the upper block is stacked in Figure 6,

8 is a perspective view of the rear portion showing the construction of the retaining wall to which the construction method according to the present invention is applied;

9 is a front perspective view of the retaining wall constructed by the method of the present invention;

10 is a side cross-sectional view and enlarged view of a main part of the retaining wall constructed by the method of the present invention,

FIG. 11 is a view corresponding to the enlarged part of the main part of FIG. 10 to show the deformation state of the distal end portion of the reinforcing material when an uneven settlement occurs;

12 is a front view of a retaining wall showing a state at the time of uneven settlement in the reinforced soil retaining wall according to the present invention;

13 is a perspective view of the back portion of the retaining wall for explaining a method of constructing a reinforcing material at a corner portion (curved portion) of the retaining wall;

14 is a front perspective view of the retaining wall in the same state as in FIG. 13;

15 is a perspective view of a retaining wall building block according to another embodiment of the present invention;

16 is a side view of the block shown in FIG. 15;

17 is a plan view of the block shown in FIG. 15;

18 is a bottom view of the block shown in FIG. 15,

FIG. 19 is a front view of a retaining wall showing a state at the time of uneven settlement after the block shown in FIG. 15 is built into two stages;

FIG. 20 is a view corresponding to FIG. 19, showing a front view of a retaining wall showing a state when an uneven settlement occurs in another embodiment; FIG.

FIG. 21 is a front view of a retaining wall showing a state at the time of uneven settlement when the block according to the present invention is constructed in a one-stage stacking manner; FIG.

Fig. 22 is a rear perspective view of the retaining wall showing a state in which a block of the present invention is constructed in two stages;

23 is a side cross-sectional view of a retaining wall completed by forming a two-stage unit,

24 is a perspective view of the front part of the retaining wall completed by forming a two-stage unit,

25 is a rear perspective view of the retaining wall showing a state in which the first stage stacking method is constructed;

Figure 26 is a perspective view of the front portion of the retaining wall completed in a one-stage stacking method,

27 is a plan sectional view of a straight retaining wall constructed with a block of the present invention;

Fig. 28 is a cross-sectional plan view of a straight line and a curved boundary of a retaining wall constructed with a block of the present invention;

29 is a plan sectional view of the protruding curved retaining wall;

30 is a plan sectional view of the indentation curved retaining wall;

Fig. 31 is a perspective view of the back part showing the construction state of the corner part;

32 is a perspective view of the front part showing a state of construction of a corner part;

33 is a sectional view showing a state before settlement of a retaining wall constructed with a block of the present invention, and an enlarged main portion thereof;

34 is a state diagram after settling in a diagram corresponding to the enlarged view of the main part of FIG. 33;

35 is a perspective view of a block according to another embodiment of the present invention;

36 is a plan view of the block shown in FIG. 35;

37 is a perspective view of a block according to another embodiment of the present invention;

FIG. 38 is a plan view of the block shown in FIG.

39 is a bottom view of the block shown in FIG. 37;

40 is a perspective view showing a state in which the leading end of the strip-shaped fiber reinforcement is fastened to the block unit made of the block shown in FIG. 37;

41 is a plan view showing a state where the front end of the band-shaped fiber reinforcement is fastened to the block shown in FIG. 37;

FIG. 42 is a view for explaining the absorbed state of earth pressure received when compacting the reinforcement soil in the retaining wall constructed with the block shown in FIG.

* Explanation of symbols for main parts of the drawings

10: block 11: ground plane

10a, 10b: lower block 10c, 10d: upper block

12: reinforcement insert groove 13: external force absorption groove

14: engaging projection 15: through hole

16: coupling groove 17: buffer surface

18: wing portion 19: gripping portion

20: strip type fiber reinforcing material 20 ': strip type fiber reinforcing material (for preventing separation)

30: reinforced earth 40: drainage filter

100: block unit 100a, 100b, 100c, 100d: block unit

E: Concrete foundation W: Retaining wall

The present invention relates to a method for building a prefabricated reinforcement retaining wall and a block for building retaining wall. In detail, the laying density of the strip-shaped fiber reinforcement connected to the block forming the retaining wall and embedded in the reinforcement soil on the rear surface of the block is in the vertical direction as well as the horizontal direction. Also, it is possible to make the overall uniformity, increase the binding force between the block and the reinforcement material, and at the same time, it is possible to strengthen the reinforcement soil and the front wall with minimal reinforcement, and effectively prevent the local displacement of the front wall in case of uneven settlement. The block is made of a grounding system that has excellent durability against the shearing force that the laminated structure receives during the occurrence of uneven settlement, and the position of the local block is secured by the solid convex coupling between the engaging projection on the upper surface and the engaging groove on the lower surface. It is effective to deform the retaining wall or to collapse the retaining wall. It will have to be ever prevented.

In general, prefabricated reinforcement retaining wall, which is used as a civil retaining wall for large-scale road construction and complex construction, is constructed at the factory and transported to the site by the block, which is the main material, so that it can be constructed and filled at the same time. Compared to reinforced concrete retaining wall, it has a short construction period, excellent stability against uneven settlement due to the flexibility of the structure, low construction cost (economical efficiency), and no restriction on the height of the retaining wall, and it does not cause the complexity of the construction site. Because of the spotlight.

1 and 2 show a retaining wall constructed with a trade name "Keystone" block, which is a product represented by a block retaining wall for civil engineering. The keystone block (B) has a geometric cross-sectional shape to maximize structural stability, and The block B, the block B, the block B, and the reinforcing material R are bonded to each other using a grid type reinforcing material R and a pin P as a material.

In the conventional prefabricated retaining soil retaining wall, as shown in FIGS. 1 and 2, a grid (GRID) having a very thin reinforcement (R) for supporting the block and resisting the pressure of the soil is located behind the front wall (block); The reinforcement (R) is embedded at regular intervals in the upper and lower intervals (every three to four layers on the drawing). In such a construction method, the retaining wall is formed in the horizontal direction. In the horizontal direction, the reinforcement was installed on the entire surface, and in the vertical direction of the retaining wall, the reinforcement was buried at intervals of three to four layers. The spacing of the reinforcement in the direction is large, resulting in non-uniform reinforcement spacing, resulting in a lack of binding force between the upper and lower blocks and the connection density of the reinforcement of the block There is a problem that the waste of material and deformation of various external forces are generated due to the lowering of the block, local displacement, and lengthening of the front and rear of the block.

In addition, as shown in FIG. 3, the grid-shaped reinforcement connection structure of the block is simply connected to the structure in which the reinforcement is sandwiched between the block and the block, so that an uneven settlement occurs in the foundation portion of the retaining wall, resulting in displacement of the retaining wall surface. When it occurs, the building state of the blocks forming the retaining wall is disturbed, and in the area indicated by the small circle (D), the stress is concentrated on the grid-shaped reinforcement (R) and the reinforcement is stretched or shorted. As the binding force between the block and the reinforcement deteriorated, there was a high possibility of occurrence.In the case of the retaining wall structure in which the increase and short circuit of the reinforcement and the decrease in the binding force between the block and the reinforcement occurred, the resistance against subsequent inequality or other displacement The serious problem of losing the basic stability of the retaining wall structure It is generated. In addition, in the portion indicated by another small circle (D ') in the drawing, as the connection pins (P) connecting the upper and lower blocks are pulled out, the connection state is deteriorated, and there is a high possibility that a large horizontal displacement of the block occurs.

Figure 4 is a perspective view of the rear portion of the prefabricated retaining soil retaining wall in the state of construction showing the laying state of the band-like fiber reinforcement for civil engineering according to the present invention (patent application 2004-111929; filed on December 24, 2004).

The band-shaped fiber reinforcement (R) according to the above-described invention is different from the connection method in which the block and the reinforcement connection structure of the keystone block method as shown in Figs. Otherwise, it is possible to connect the reinforcement directly to the block (B) without using an additional material such as a separate anchor or connecting pin, which is a connection between the block (B) and the strip-shaped fiber reinforcement (R) without additional cost burden on the auxiliary material. It is possible to work and improve the binding force by directly inserting and supporting the width of the strip-shaped fiber reinforcement in half folded state in the reinforcement insertion groove (b) formed in the block (B) and connect the strip-shaped fiber reinforcement using an anchor as in the prior art. It is possible to solve the loosening of the belt-shaped fiber stiffeners that occurred when the belt-shaped fiber stiffeners were pulled and applied by manpower or a separate pull mechanism. Securing the control structural stability as well as is so workability and economy can also be improved.

On the other hand, in the retaining wall construction method as shown in Figure 4, because the reinforcement (R) had to be connected to each block individually, the reinforcement was excessively consumed, there was an uneconomical problem, in order to solve this problem neighboring the reinforcement The present invention was completed in the process of researching a method of connecting in conjunction with a block and a coupling method through interlocking between adjacent upper and lower blocks.

An object of the present invention is to build a block-assembled reinforcement soil retaining wall using the band-shaped fiber reinforcement according to the applicant's prior application described above, the laying interval of the reinforcement in the horizontal direction (horizontal direction), as well as in the vertical direction (vertical direction). In addition, the laying density of the reinforcement per unit width in the horizontal direction is appropriately maintained to prevent local deformation of the retaining wall and to increase the friction effect between the soil and the reinforcement. It can reduce the material cost and logistics cost of the block by strengthening the binding force between the reinforcement, shortening the front and rear length of the block by shortening the reinforcement installation interval in the vertical direction of the block. It is possible to minimize the consumption of reinforcement material when building blocks and to improve the construction speed of retaining walls. To provide a modular construction method of reinforced earth retaining wall in the way.

The present invention also provides a retaining wall construction block suitable for the above-described construction method, but it is possible to prevent the cracking of the block despite the shearing force that is applied when the stacking structure of the block is inevitably settled, and the difference between the upper and lower blocks. It is to provide a block that can form a coupling structure that can prevent local deviation of the block despite settlement.

In order to achieve the above object, the present invention is installed in the reinforcement insertion groove formed in the concrete block constituting the retaining wall surface in the state in which the front end portion of the belt-shaped fiber reinforcement is folded in half width or multiple along the longitudinal direction, In a method of supporting a front wall together with reinforcement of reinforcement soil, the front end portion of the strip-shaped fiber reinforcement is simultaneously inserted into reinforcement insertion grooves formed in a plurality of lower blocks adjacent to the left and right, and rear ends of both sides of the fiber reinforcement are reinforced. It is placed parallel to the reinforcement body and installed in a landfill, and a plurality of upper blocks are stacked to form a block unit on the lower block in which the fiber reinforcement is sandwiched so as to overlap the lower block up and down, and the stacked block units are stacked in a stacking manner to retain the wall surface. How to build prefabricated retaining wall retaining wall And balls.

The construction method of the present invention is applicable not only to the straight retaining wall but also to the curved retaining wall that is indented or protruded outward, and the upper and lower block units are formed on the curved retaining wall surface, for example, the corner of the retaining wall. A separate strip-shaped fiber reinforcement is installed between two or more adjacent blocks to prevent the separation between adjacent blocks to the left and right between the blocks. As a result of the block being pushed outwards, the gap between the blocks can be effectively prevented.

The present invention is also a retaining wall construction block suitable for the above construction method, the upper surface is provided with a reinforcing member insertion groove which is directly connected to the front end portion of the strip-shaped fiber reinforcement embedded in the reinforcement soil, the left and right sides between adjacent blocks In the block for reinforcement earth retaining wall construction block with wings to prevent gaps, the block has a ground plane between blocks stacked up and down in parallel with the same width in the front and rear directions on the left and right sides of the block top surface, and between the two ground planes. The external force absorbing groove is formed in the step is lower than the ground plane is formed, the left and right outer wings are also formed at the same height as the external force absorbing groove.

In the block of the present invention, a coupling protrusion protruding from the ground plane is formed on the upper surface, and a coupling groove to which the coupling protrusion is coupled is continuously formed in the left and right directions on the lower surface of the block, and the upper and lower blocks are unevenly coupled by the coupling protrusion and the coupling groove. The reinforcement insert groove is formed along the front side of the engaging projection.

Hereinafter, with reference to the accompanying drawings, preferred embodiments that do not limit the present invention will be described in detail.

5 is a schematic view for explaining a method for constructing a prefabricated retaining soil retaining wall according to the present invention, Figures 6 and 7 are for explaining the method of construction according to the present invention, a band-shaped to two adjacent lower left blocks After the front end of the fiber reinforcement at the same time, the upper block is superimposed on it to form a block unit is shown.

8 is a rear perspective view showing the construction state of the retaining wall to which the construction method according to the present invention is applied, and FIG. 9 is a front perspective view of the retaining wall constructed by the method of the present invention.

As shown in FIG. 5 to FIG. 9, the present invention has a half width along the length direction of the front end portion of the strip-shaped fiber reinforcement 20 in the reinforcement insertion groove 12 formed in the concrete block 10 forming the retaining wall (W). Installed in a multi-folded state, the rear portion of the strip-shaped fiber reinforcement 20 is embedded in the reinforcement soil 30 in the method for supporting the front wall with the reinforcement of the reinforcement soil 30, the strip-shaped fiber reinforcement ( 20 is simultaneously inserted into the reinforcement insert grooves 12 formed in the plurality of lower blocks 10a and 10b adjacent to the left and right, and rear ends of both sides of the strip-shaped fiber reinforcement 20 are placed in parallel on the reinforcement soil 30 to be embedded. The upper blocks 10c and 10d are stacked on the lower blocks 10a and 10b on which the strip-shaped fiber stiffeners 20 are fitted so as to overlap the lower blocks 10a and 10b. And multiple stacked blocks Agent is laminated to (100a, 100b, 100c, 100d) it has an upper and a lower switching stacking method as shown in Figure 5 is adapted to form a retaining wall.

In the description of the present invention and the notation of reference numerals, the reference numerals 10 are used for the convenience of the blocks, and the codes 10a, 10b, 10c, and 10d are used for the classification of the blocks. In this case, the reference numeral 100 is used, and each block unit is divided into 100a, 100b, 100c, and 100d.

On the other hand, reference numeral 11 is a ground plane formed in the front and rear directions on the left and right sides of the upper surface of the block 10, 13 is an external force absorption groove formed inside the ground plane 11 of the upper surface of the block 10, 14 is a block Coupling protrusions are formed on the left and right sides of the upper surface of the (10), reference numeral 15 is a through hole formed in the middle portion of the block penetrating up and down, 16 is a coupling groove formed in the lower surface of the block, thereby each block unit ( When the upper and lower blocks 10a and 10c and 10b and 10d forming 100 are stacked while being stacked at the same position, the upper blocks 10a and 10c and 10d are interlocked with each other and are stacked in a stacking manner. The lower and upper blocks between the block units 100a, 100b, 100c, and 100d are also held in the interlocking state while the engaging projections 14 of the lower block are fitted into the engaging grooves 16 continuously formed in the left and right directions on the lower surface of the upper block. do.

Reference numeral 18 denotes a blade extending on the left and right outer sides of the block 10. The blade 18 is for preventing a gap between adjacent blocks from side to side. In the present embodiment, a straight retaining wall or a curved shape When building the retaining wall, an asymmetrical uneven surface is formed so that adjacent left and right blocks can form mutually uneven coupling, but in the present invention, the shape of the wing 18 may be symmetrical and may be modified into various other forms. Of course it can.

Reference numeral 19 denotes gripping portions on both sides of the rear end of the block 10, and the gripping portions may be formed with breakage grooves so as to be detached as necessary.

Also, reference numeral 40 denotes a drain filter installed on the rear surface of the block to prevent the soil from being lost when rainwater or groundwater is drained from the reinforced soil to the retaining wall.

In the block construction method according to the present invention, as shown in Figs. 6 and 7, four bands 10a, 10b, 10c, and 10d are connected to one strip-shaped fiber reinforcement 20, and the four blocks are formed. 10a, 10b, 10c, and 10d are integrated between the blocks 10a and 10b, 10c, and 10d adjacent to each other by the reinforcement 20, and between the blocks 10a, 10c, 10b, and 10d adjacent to each other. The interlocking state is formed by the interlocking protrusion 14 and the coupling groove 16 to be integrated to form a block unit 100 that structurally functions as a single panel or a large retaining wall block. Since the fiber reinforcement 20 is directly connected to the middle portion of the block unit 100, when the earth pressure of the reinforcement soil 30 acts on the four blocks 10a, 10b, 10c, and 10d, its supporting force is located in the middle portion. Concentrated on the strip-shaped fiber reinforcement (20), if the reverse description 4 In the block (10a, 10b, 10c, 10d) will be led to the support structure in which force is uniformly distributed in the belt-formed fiber reinforcing material (20).

Therefore, in the block construction method of the present invention, the laying interval of the reinforcing material can be made uniform in the left and right directions as shown in FIG. 5, and can be evenly distributed without any bias in the vertical direction. In this case, even when the earth pressure of the reinforcement soil 30 acts locally, all the blocks 10a, 10b, 10c, and 10d are connected to the strip-shaped fiber reinforcement 20 to form a retaining wall. The displacement of the surface can be effectively prevented.

In addition, the present invention can maintain the proper spacing so that the laying density of the strip-shaped fiber reinforcement 20 per unit width in the horizontal direction (horizontal direction) is not excessively necessary, so that the friction effect between the soil and the strip-shaped fiber reinforcement can be increased, and the block The spacing of the reinforcement in the up, down, left, and right directions (horizontal and vertical directions) is generally uniform, and each strip-shaped fiber reinforcement is subjected to uniform external force, thereby effectively strengthening the structure.

In addition, the present invention consists of a structure to hang four blocks (10a, 10b, 10c, 10d) at the same time with one strip-shaped fiber reinforcement 20, compared with the conventional individual reinforcing material laying method, the horizontal direction of the block The installation interval of the strip-shaped fiber reinforcement is widened and the installation interval of the reinforcement is denser in the vertical direction, so that the quantity required for installing the reinforcement can be reduced, and the material cost and logistics cost of the block can be reduced by shortening the front and rear length of the block. You can also save money.

In addition, in the block construction method of the present invention, the reinforcing material 20 is provided between the upper and lower blocks 10a and 10c, 10b and 10d in which the engaging protrusion 14 and the engaging groove 16 form an interlocking state. Even if there is gap between the block units (100a, 100b, 100c, 100d), which are constructed in a stacking manner due to uneven settlement, the block unit will maintain the same shape as one integrated panel. As the part does not open, the binding force between the reinforcement and the block is maintained as it is, thereby effectively preventing the retaining wall from being greatly deformed or conducted even in case of further subsequent inequality or other displacement, thereby ensuring the seismic resistance and stability of the retaining wall structure continuously. You can do it.

Hereinafter, a process of constructing the prefabricated reinforced retaining wall by applying the method of construction according to the present invention will be described.

First, a process of constructing a straight retaining wall will be described.

8 is a perspective view of the back of the retaining wall showing a state in which the retaining wall to which the building method according to the present invention is applied is being constructed, wherein the building process of the retaining wall first includes forming a concrete foundation (E) (S1); Constructing blocks (10a, 10b) primarily on the constructed concrete foundation (E) (S2); The front end portion of the band-shaped fiber reinforcement 20 is installed in a state in which the end portion of the band-shaped fiber reinforcement 20 is folded in half width or multiple along the longitudinal direction, and the band-shaped fiber reinforcement 20 The rear portion of the straightening step on the reinforcement soil (30) (S3); Secondly constructing a plurality of upper blocks 10c and 10d so as to overlap the lower blocks 10a and 10b on the lower blocks 10a and 10b to which the band-shaped fiber reinforcement 20 is inserted (S4); Constructing the lower blocks (10a, 10b) in the third order as in the step (S2) again in a vertical stacking manner on the secondaryly constructed blocks (10c, 10d) (S5); Connecting the reinforcement on the thirdly constructed blocks (10a, 10b) as in step S3 again (S6); Step (4) constructing a plurality of upper blocks (10c, 10d) in order to overlap the lower blocks (10a, 10b) on the lower blocks (10a, 10b) to which the strip-shaped fiber reinforcement (20) is inserted; It consists of, and this step is to be performed repeatedly according to the building height of the block.

In the retaining wall construction process, the step of burying and compacting the rear portion of the strip-shaped fiber reinforcement 20 in the reinforcement soil 30 is the same as in the construction method of the existing prefabricated reinforced soil retaining wall, and thus description thereof will be omitted.

In the present invention, the lower blocks 10a and 10b and the upper blocks 10c and 10d stacked to overlap each other form one block unit 100, and the plurality of stacked block units 100a, 100b and 100c are stacked. , 100d) is stacked in a vertical stacking manner to form the retaining wall.

In addition, in the present invention, the front end portion of the strip-shaped fiber reinforcement 20 is simultaneously fitted into the reinforcement insertion grooves 12 formed in the plurality of lower blocks 10a and 10b adjacent to the left and right, and the rear ends of both sides of the strip-shaped fiber reinforcement 20 are formed. In the case of one block unit 100, the strip-shaped fiber reinforcement 20 is installed in a "U" shape in parallel to the reinforcement soil 30, and when the strip-shaped fiber reinforcement 20 is continuously installed in a zigzag manner, meandering. It is installed in the form of () 行).

In the construction method of the present invention, the strip-shaped fiber reinforcement 20 may be individually installed for each block unit 100, as well as continuous construction in a zigzag manner, which may be selected in consideration of the conditions of the retaining wall installation site.

By repeating the above process several times, the vertical retaining wall as shown in FIG. 9 is constructed, and the outer wall of the retaining wall is constructed in a two-stage stacking manner, compared to a retaining wall constructed in a one-stage stacking manner. Instead of being crude, it gives a concise and grand feeling.

FIG. 10 is a side cross-sectional view and enlarged view of a retaining wall constructed by the method of the present invention, and FIG. 11 is a view corresponding to the enlarged view of the recess of FIG. 10 showing a deformation state of the band-shaped fiber stiffener tip when an uneven settlement occurs. It is for.

As shown in FIGS. 10 and 11, in the retaining wall construction method of the present invention, when the settlement of the reinforcement soil 30 occurs after completion of the retaining wall construction, the reinforcing material 20 between the retaining wall W and the reinforcement soil 30 is formed. ) The stress is concentrated on the tip part, in this case, as shown in FIG. 11, the tip part of the reinforcing material 20 is folded and then unfolded flat and lowered downward with the reinforcement soil 30 as shown by the arrow. Since the stress is not concentrated in this portion, the phenomenon in which the strip-shaped fiber reinforcement 20 is cut does not occur, thereby effectively preventing displacement or conduction of the retaining wall.

FIG. 12 schematically shows a front surface of a retaining wall showing a state of occurrence of uneven settlement in a reinforced soil retaining wall according to the present invention, by simultaneously walking the strip-shaped fiber reinforcement 20 to the adjacent blocks 10a and 10b at the same time. Since the coupling structure can strengthen the binding force between the left and right blocks, the gap can be minimized, and between the upper and lower blocks, the coupling protrusion 14 and the coupling groove 16 (see FIG. 11) still maintain a solid interlocking state. Since the phenomenon that the fiber reinforcement 20 is separated from the block does not occur, the stability of the retaining wall can be maintained as it is.

Hereinafter, the construction method of a curved retaining wall (particularly, a retaining wall corner portion) will be described.

13 and 14 is a perspective view of the rear and front parts of the retaining wall corner portion showing a state in which the present invention is applied to the corner retaining wall, but in the present embodiment, the same process as the above-described process of constructing the straight retaining wall is performed. A stripping prevention band reinforcing material 20 'is additionally installed between the block units 100a and 100b. In this embodiment, the stripping type fiber reinforcing material 20 prevents the separation between adjacent blocks left and right between the upper and lower block units. ') Is continuously inserted into the reinforcement insert groove 12 of each block between two or more adjacent blocks (to all the blocks on the left and right to form a corner portion in the drawing) and both ends of the reinforcement body (not shown) ) To be embedded in.

In the present embodiment, when the block 10 removes all the gripping portions 19 on both sides of the rear end according to the radius of curvature of the retaining wall or removes only one side, the block 10 has a small retaining wall without opening the front side of the adjacent block to the left and right. Can build.

According to the construction method in the corner retaining wall according to the present embodiment, when the earth pressure of the reinforcement soil is applied to the block forming the retaining wall surface after the completion of the retaining wall is completed, the gap between the blocks adjacent to the left and right by radial action is applied radially. It can be minimized by the band-shaped fiber reinforcement (20 ') is installed additionally there is an advantage that can maintain the stable state of the corner portion of the retaining wall.

15 to 18 show a retaining wall construction block according to another embodiment of the present invention, the block 10 of the present embodiment is a reinforcement insert groove that is directly connected to the front end of the band-shaped fiber reinforcement is embedded in the reinforcement body on the upper surface In the reinforcement retaining wall construction block provided with (12), the wing portion 18 to prevent the gap between the adjacent blocks on the left and right sides, the block 10 is a ground plane between the blocks stacked up and down (11) is formed in the front and rear directions on the left and right sides of the upper surface of the block, and the external force absorbing groove 13 having a step lower than the ground plane 11 is formed between the ground planes 11 on both sides. The outer wing 18 is also formed at the same height as the external force absorbing groove 13.

In the block of the present invention, the left and right middle portions of the upper surface are formed with a coupling protrusion 14 protruding upward from the ground plane 11, and the coupling portion 14 is coupled to the middle portion of the bottom surface of the block. Since the grooves 16 are continuously formed in the left and right directions, the upper and lower blocks can be firmly coupled to each other by the uneven coupling method.

The coupling groove 16 of the lower surface is formed in a slightly wider width than the coupling protrusion 14 of the upper surface, the depth is also formed deeper than the height of the coupling protrusion (14).

In addition, in the block 10 of the present invention, the reinforcing material insertion groove 12 formed on the upper surface of the block is formed along the front outer edge of the coupling protrusion 14, and the reinforcing material insertion groove 12 is as shown in the plan view of FIG. Likewise, the block 10 is opened toward the left, right and rear sides of the block 10 to form an overall T shape, so that the band-shaped fiber reinforcement can be bound in association with an adjacent block.

In the block of the present invention, the depth of the external force absorbing groove 13 formed on the upper surface is 4 to 6 mm from the upper surface, and the external force absorbing groove 13 is not exposed to the front and left and right sides of the block 10, Therefore, the external force absorbing groove 13 may be extended to the rear to be exposed to the rear.

In addition, the external force absorbing groove 13 is located in the upper wing portion 18 of the block is stacked on the top, since the upper surface of the lower block of the wing portion 18 does not directly contact the ground plane 11 In the case of uneven settlement of the retaining wall, stress is concentrated on the wing portions 18 on both sides of the block, thereby effectively preventing cracking or cracking.

In addition, the block of the present invention because the external force absorbing groove 13 and the upper surface of both sides of the wing 18 forms a low step with respect to the ground plane 11, this portion is the reinforcement soil in addition to the external force absorbing function during unequal settlement. ) The water penetrated into the inside of the retaining wall will function as a drain groove.

19 and 20 are front views of a retaining wall showing a state when ground unevenness occurs in a retaining wall constructed by two-stage block formation according to the present invention, in which blocks of specific rows are settled by uneven settling (shown by arrows); If the block units are stacked on the left and right sides as shown in the drawing, the tilting phenomenon occurs. At this time, the external force of the upper surface of the block unit on which the lower ends of the wing units 18 on both sides of the stacked block units are different from each other. Since it is accommodated in the absorption groove 13, the width of the shear force acts on the block unit is reduced to minimize the occurrence of cracks in the block.

In addition, in the case shown in Fig. 20, the upper end of the wing portion 18 is also formed at the same height as the above-mentioned external force defect groove 13, so that the step is formed in spite of the inclination of the block unit. It is possible to effectively prevent the breakage of.

In the present invention, despite the occurrence of uneven settlement of the ground as shown in FIG. 19 and FIG. 20, the engaging protrusion 14 of the upper surface of the block and the engaging groove 16 of the lower surface of the block are still in an interlocking state. Local departures and resulting deformation of the retaining wall can also be effectively prevented. That is, the present invention is because the coupling protrusion 14 and the reinforcing material insertion groove 12 for interlocking between the external force absorbing groove 13 and the upper and lower blocks are formed in an organic position adjacent to each other Figs. 19 and FIG. Even in the case of block displacement due to uneven settlement as shown in 20, the binding force between blocks and reinforcement as well as between blocks constructed in an up-and-down stacking method can be stably maintained, and the separation of blocks can also be prevented.

 In addition, in the block of the present invention, the ground plane 11 between blocks is formed in the front and rear directions on the left and right sides of the block upper surface, so that even when a load is applied vertically while the block is inclined due to uneven settlement, Since the ground width is equal to the front and rear direction, the external force is uniformly applied, thereby preventing the concentration of stress and preventing cracking of the block.

FIG. 21 is a front view of a retaining wall showing a state at the time of uneven settlement when a block according to the present invention is constructed in a one-stage stacking method. FIG. 21 and FIG. Like the settlement situation, it is shown that the minimization of the occurrence of cracking and the binding force between the block 10 and the band-shaped fiber reinforcement 20 can be stably maintained.

Fig. 22 is a rear perspective view of a retaining wall showing a state in which a block according to the present invention is constructed in two stages, and Fig. 23 is a side sectional view of a retaining wall completed in two stages, and Fig. 24 is a two stage unit. It is a front perspective view of the completed retaining wall.

As described above, the method of constructing the block of the present invention by uniting the two-stage unit is as follows. First, the concrete foundation E is formed and the blocks 10a and 10b are first constructed thereon, and second, the first constructed block ( 10a, 10b) Insert the front end of the strip-shaped fiber reinforcement 20 in the reinforcing member insertion groove 12 of the upper surface and lay the rear part in a straight line on the reinforcing soil 30, and third, the second block on the lower block (10a, 10b) The upper blocks 10c and 10d are superimposed and constructed. Fourth, the lower blocks 10a and 10b are three-dimensionally constructed in a vertical stacking manner, and the band-shaped fiber reinforcement 20 is connected thereon. The above-described process of constructing the upper blocks 10c and 10d so as to overlap the fourth order may be repeated according to the height of the block.

25 and 26 illustrate a state in which the block of the present invention is constructed in a one-stage stacking manner as in the conventional block, unlike the above.

FIG. 27 is a plan sectional view of a straight retaining wall constructed with a block of the present invention, FIG. 28 is a plan sectional view of a straight and curved boundary wall of a retaining wall constructed with a block of the present invention, and FIG. 29 is a plan sectional view of a projecting curved retaining wall. Fig. 30 is a plan sectional view of the indentation curved retaining wall.

As shown in FIG. 27 to FIG. 30, the block of the present invention, when constructing a straight retaining wall as well as a curved retaining wall, has a coupling protrusion 14 and a lower surface for interlocking between blocks compared to the conventional binding rod connection method. The coupling area between the coupling grooves 16 of the block can improve the accuracy of the connection between the blocks, and even when a displacement occurs in the left and right directions between the upper and lower blocks, the contacting ground between the upper and lower blocks is still forward and backward. In parallel, damage to the block due to stress concentration can be prevented.

31 and 32 are rear and front perspective views showing the construction state of the corner portion, wherein the band-shaped fiber reinforcement 20 'for preventing separation is further provided between the upper and lower block units 100a and 100b in the corner portion. It is designed to prevent deformation of the retaining wall. When earth pressure of reinforcement soil is applied to the block forming the retaining wall surface after completion of the retaining wall construction, the earth pressure acts radially and the gap between the adjacent blocks to the left and right opens. Since it can be minimized by the additional strip-shaped fiber reinforcement (20 ') is to maintain a stable state of the corner portion of the retaining wall.

33 and 34 are sectional views and enlarged views showing the state before and after settlement of the retaining wall constructed by the block of the present invention, and the settlement of the reinforcement soil in the retaining wall of the block of the present invention constructed by the construction method of the present invention. In case of occurrence of stress, stress is concentrated at the distal end of the reinforcing material 20 between the retaining wall W and the reinforcing soil 30. At this time, in the present invention, the distal end of the band-shaped fiber reinforcing material 20 is folded and then flattened. Since it goes down together with (30), the phenomenon in which this part is cut by the concentration of stress does not occur, and the displacement of the retaining wall can be effectively prevented.

FIG. 35 is a perspective view of a block according to still another embodiment of the present invention, and FIG. 36 is a plan view of the block shown in FIG. 35. In the present embodiment, the inner through hole 15 is shown in the block of the embodiment shown in FIG. 6. It is formed to integrally long in the width direction (left and right directions) of the block to facilitate the weight reduction of the block, and to facilitate the insertion of jigs (jig) of the lifting equipment when lifting the block using the lifting equipment.

37 to 39 illustrate a block according to another embodiment of the present invention. The block 10 of the present embodiment also includes a reinforcing member insertion groove 12 in which a front end portion of a strip-shaped fiber reinforcement embedded in a reinforcement soil is directly connected to an upper surface thereof. ) Is generally formed in a "T" shape so as to open to the left and right sides and the rear side, and wing portions 18 are formed on both left and right sides to prevent gaps between adjacent blocks. The ground plane 11 is formed on the left and right sides of the ground plane 11 in the front and rear directions, and an external force absorbing groove 13 having a step lower than the ground plane 11 is formed between the ground planes 11. The right outer wing 18 is also formed at the same height as the external force absorbing groove 13, and the engaging protrusion 14 and the engaging groove 16 are respectively formed on the upper and lower surfaces of the block for interlocking between the upper and lower blocks. Which is the same as the embodiment described above.

On the other hand, the block of the present embodiment is the back portion of the block is different from the block of the embodiment shown in Figures 6, 15 and 35, which is not the grip portion 19 is formed in the block rear portion instead of the left, right The buffer surface 17 is formed in the diagonal direction at both sides, and the block 10 forms the form which narrows left and right width toward the back side.

In addition, in the block of this embodiment, one oval through hole 15 is formed up and down inside the block, and the reinforcing material insertion groove 12 is in contact with the side and the rear of the through hole 15.

FIG. 40 is a perspective view showing a state where the front end of the band-shaped fiber reinforcement is hooked to a block unit made of the block shown in FIG. 37, and FIG. 41 is a view showing a state where the front end of the band-shaped fiber stiffener is hooked on the block shown in FIG. FIG. 42 is a plan view illustrating the absorption state of earth pressure received when the reinforcing soil is compacted in the retaining wall being constructed by the block shown in FIG. 37. The retaining wall may be constructed using the block 10 of the present embodiment. At this time, it is possible to effectively prevent the left and right distortion of the block and the concentration of stress in the block and the reinforcement connection.

Referring to this, first, the portion of the external force is applied directly to the earth pressure of the reinforcement soil 30 is concentrated on the back having a narrow width of the block, so close to the reinforcement insertion groove 12 which is a reinforcement connecting portion that resists external force block The left and right of the warp is to be prevented, and second, the buffer surface (17) formed diagonally on both sides of the rear of the position relatively far from the reinforcement insertion groove 12 is a force at a right angle when the earth pressure of the reinforcement soil 30 is applied. This is to be inclined without being applied, so that the external force is dispersed and the torsional force against the earth pressure of the reinforcement soil 30 is applied to prevent the left and right warpage of the block. Third, the place close to the center of the force having high resistance to external force. Is formed to be perpendicular to the direction in which the external force is applied to support the external force. , Wu is to prevent distortion and prevent stress concentration.

The external force supporting function and the external force absorbing function of the block of this embodiment can be easily understood from the construction state plan view of FIG. 42, which is the earth pressure (arrow A1) of the reinforcement soil 30 at the time of block construction or during compaction at the rear of the block after block construction. ) Acts at a right angle to the reinforcement insertion groove 12 is limited to the narrow rear surface of the block 10 formed in the center to prevent the left and right distortion of the block, the position relatively far from the reinforcement insertion groove 12 The earth pressure (arrow A2) of the reinforcement soil 30 is applied to the buffer surface 17 of the reinforcement soil 30 at an angle smaller than 90 °, and the reinforcement soil 30 is pushed into the space formed between adjacent blocks on both sides. As a result of absorbing external force (earth pressure), it is possible to effectively prevent distortion or fall of the block, and to prevent local concentration of earth pressure of the reinforced soil.

In addition, due to the wedge role of the earth and sand wrapped in the drain filter 40 made of a non-woven fabric to prevent the left and right of the block and the pressing of the lower block to prevent the fall of the lower block.

As described above, the present invention can uniformly set the spacing of the strip-shaped fiber reinforcement embedded in the reinforcement soil on the back surface of the block to form the retaining wall as a whole in the vertical direction as well as in the left and right directions. The rigidity of the front wall can be enhanced, and local displacement of the front wall can be effectively prevented in the event of an uneven settlement, thereby further improving the durability, economical efficiency, and workability of the retaining wall. It has a structure that prevents the crack of the block in spite of the shearing force received, and it is useful to build a stable retaining wall because it prevents the local deviation of the block despite the uneven settlement between the upper and lower blocks. Has

Claims (10)

The front end of the strip-shaped fiber reinforcement is folded in half width or multiples along the length direction in the reinforcement insertion groove formed in the retaining wall surface. In addition to supporting the front wall, The front end portions of the strip-shaped fiber reinforcement 20 are simultaneously inserted into the reinforcement insertion grooves 12 formed in the plurality of lower blocks 10a and 10b adjacent to the left and right, and the rear ends of both sides of the strip-shaped fiber reinforcement 20 are reinforced soil body 30. A plurality of upper blocks 10c and 10d are stacked on the lower blocks 10a and 10b on which the strip-shaped fiber reinforcement 20 is inserted and overlapped with the lower blocks. A plurality of block units (100a, 100b, 100c, 100d) thus stacked is stacked in a vertical stacking method to form a retaining wall surface prefabricated reinforcement soil retaining wall, characterized in that. The method according to claim 1, The retaining wall surface is a method of building a prefabricated reinforced soil retaining wall, characterized in that forming a straight or curved. The method according to claim 2, Between the upper and lower block units, a strip-shaped fiber reinforcement 20 'for preventing separation between adjacent blocks to the left and right is continuously inserted into the reinforcement insertion grooves 12 of each block between two or more adjacent blocks. And both ends thereof are embedded in the reinforcement soil body 30. The block used for the construction method according to any one of claims 1 to 3, Reinforcement insert groove 12 is formed in the upper surface is directly connected to the front end portion of the belt-shaped fiber reinforcement is embedded in the reinforcement body, the left and right sides are formed with wings to prevent the gap between the adjacent blocks, the block 10 The ground plane 11 between the blocks stacked up and down is formed in the front-rear direction on the left and right sides of the block upper surface, and the external force absorbing groove having a step lower than the ground plane 11 inside the two ground planes 11 ( 13) is formed, the reinforcement earth retaining wall building block, characterized in that the left and right outer wing portion 18 is also formed at the same height as the external force absorbing groove (13). The method according to claim 4, Coupling protrusions 14 protruding higher than the ground plane 11 are formed at the left and right middle portions of the upper surface of the block 10, and the coupling protrusions 14 are coupled to the bottom surface of the block 10. Reinforced soil retaining wall building blocks, characterized in that the coupling groove 16 is continuously formed in the left and right direction, the upper and lower blocks are interlocked by the uneven coupling of these coupling projections 14 and the coupling groove (16). The method according to claim 5, The reinforcement insert groove 12 is a reinforcement earth retaining wall building block, characterized in that formed along the front surface of the engaging projection (14). The method according to claim 4, The depth of the external force absorbing groove 13 is reinforcement soil retaining wall building block, characterized in that 4 ~ 6mm from the upper surface. The method according to claim 7, The external force absorbing groove 13 is a retaining wall building block, characterized in that formed on the position corresponding to the wing portion 18 of the side of the block is not exposed to the front and left and right sides of the block. The method according to claim 4, Retaining wall building block, characterized in that the through-hole 15 is formed in the middle portion of the block 10 penetrated up and down. The method according to claim 4, The reinforcement insert groove 12 of the block is formed in a "T" shape to open to the left, right side and the rear side, the reinforcement insertion groove 12 to form a form in which the left and right widths narrow toward the rear side of the block. Retaining wall construction block, characterized in that the buffer surface 17 is formed in the diagonal direction on both the left and right sides of the.

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