JP2012026250A - Reinforcement structure and reinforcement method of existing retaining wall - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reinforcement structure of an existing retaining wall.SOLUTION: A plurality of soldier piles for which an H-shaped steel for guide is erected are driven in parallel to the back surface side of the existing retaining wall to be reinforced, and soil on the back surface side of the existing retaining wall is removed to adjust the pile head position of the soldier pile. An embedded retaining wall supported by a supporting column for which the H-shaped steel for the guide is a core material is installed on the pile head of the soldier pile to construct a retaining wall which overlaps with the existing retaining wall on the back surface inner side of the existing retaining wall. An anchor weight member configured to connect the respective supporting columns at heads is provided on the top end part of the embedded retaining wall, and an edge part around the upper part of the existing retaining wall is capped by the L-shaped edge part of the anchor weight member.

Description

  The present invention relates to a retaining wall reinforcing structure provided on an inclined ground, and a retaining wall reinforcing method.

  In residential land development sites in narrow areas, mortar or concrete was used as a fixing material so that the sloped land would not collapse, and it was leaned against kneaded masonry walls where stones or concrete blocks were piled up, natural ground or backfill soil A leaning retaining wall is generally used to resist earth pressure due to its own weight.

  In particular, it is not unusual for the retaining wall of the residential area established at the time of the residential land development boom to be over 20 to 30 years after the construction. Risk of disaster that could lead to collapse of the retaining wall if the ground pressure of the ground and backfill soil loses balance due to deterioration of fixing materials such as mortar and concrete to fix the block, and backflow soil drainage It is creating a district.

  For example, FIG. 7 is a principal part cross-sectional perspective view which shows the example of the old leaning retaining wall often seen in the conventional residential land development site. In FIG. 7, 50 is a road, 51 is a retaining wall, 52a, 52b, 52c,... Are retaining wall blocks made of Oya stone, concrete blocks, etc., and the retaining wall blocks 52a, 52b, 52c,. Is laminated on a base 53 via backfilling soil 54, backfilling stones 55, and backfilling concrete 56 to form a residential land 57. In addition, 58 is a drain hole provided at a predetermined interval, and 59 indicates the top end of the retaining wall 51.

  Thus, the retaining wall 51 described above deteriorates the backfill concrete 56 due to secular change or loses the balance between the natural ground constituting the housing land 57 and the backfill soil 54, thereby causing concentrated heavy rain and earthquakes. At this time, the retaining wall may collapse, so regular maintenance and reinforcement work are required.

  Moreover, FIG. 8 is a principal part cross-sectional perspective view which shows the example of the old retaining wall seen in the residential land development site of the comparatively high slope land. In FIG. 8, 50 is a road, 51a and 51b are two-tiered retaining walls, 60 is a large stone that constitutes the retaining wall 51a, 61 is a stone that constitutes the retaining wall 51b, 62 is a lower base, 63 is an upper base, 59 is a ceiling, 57 is a residential land, and the Oya stone 60 is laminated on the lower base 62 via backfilling soil 54, backfilling stone 55, and backfilling concrete 56. Further, the Machi stone 61 is laminated on the upper base 63 via the backfilling soil 54, the backfilling stone 55, and the backfilling concrete 56, and a housing land 57 is formed on the upper part. Reference numeral 58 denotes a drain hole provided with a predetermined interval.

  FIG. 8 shows a case where a retaining wall 51a is provided by stacking Oya stones 60 on the lower base 62 using a leaning retaining wall method, and a stone is placed on the upper base 63 in order to add the height of the retaining wall. The retaining wall 51b is constructed by laminating 61.

  Therefore, even in the example of the old retaining wall shown in FIG. 8, the internal structure of the retaining wall is not visible, but the backfill concrete 56 is surely deteriorated due to secular change, and the ground and the backfill soil 54 constituting the residential land 56 The phenomenon of unbalanced earth pressure has occurred, and there is a possibility that the retaining wall will collapse in the case of torrential rain or earthquake. In particular, the collapse of retaining walls on high slopes causes significant damage at the time of destruction. Therefore, it is necessary to reinforce the lower retaining wall or construct a new reinforced upper retaining wall.

  Thus, the present invention reinforces the old retaining wall of the construction type described in FIGS. 7 and 8, and in the case of constructing a new retaining wall by partially removing the old retaining wall, This includes reinforcement backup work for the new retaining wall.

  The problem to be solved by the present invention is to improve the efficiency of retaining walls in a narrow residential land development site by reducing the amount of soil movement, and to pile only the back of existing retaining walls as a construction area. For example, the road in front of the retaining wall is not used for anything other than loading and unloading materials, and the reinforcement work is carried out on the rear side of the retaining wall, that is, on the residential land. Reinforcement work for retaining walls that can be performed is provided.

  The present invention drives a plurality of parent piles with guide H-shaped steel standing upright on the back side of the existing retaining wall to be reinforced, and removes the soil on the back side of the existing retaining wall, and the pile head position of the parent pile , And install a retaining wall that is supported by a pillar of H-shaped steel for the guide on the pile head of the parent pile, and build a retaining wall that overlaps the existing retaining wall on the back inner side of the existing retaining wall To do.

  An anchor weight member is provided at the top end of the embedded retaining wall to connect the heads to each other, and the upper peripheral edge of the existing retaining wall is crowned by the L-shaped edge of the anchor weight member. By doing so, the existing retaining wall is reinforced.

  In addition, the present invention drives in parallel a plurality of main piles with H-shaped steel for guides installed on the back side of the upper existing retaining wall to be removed and the lower existing retaining wall to be reinforced. Adjusting the pile head position of the parent pile except the soil on the back side of the retaining wall, constructing an embedded retaining wall supported by a pillar of which the H-shaped steel for guide is a core material on the pile head of the parent pile, An anchor weight member configured to connect the heads between the columns is provided at the top end of the embedded retaining wall.

  Then, the existing retaining wall is reinforced by attaching an edge around the upper portion of the lower existing retaining wall at the L-shaped edge of the anchor weight member, and at the same time, the upper surface of the anchor weight member is used as a guide. Retaining wall having a structure in which an embedded retaining wall supported by a column of H-shaped steel as a core material is laminated again to compensate for the height of the removed upper retaining wall, and a rising wall is provided instead of the retaining wall A retaining wall is provided, and an embedded retaining wall is newly provided in the rear inner side of the lower existing retaining wall and the rising wall that replaces the removal retaining wall. Protects against earth pressure.

  The rectangular retaining wall PC plate constituting an important embedded retaining wall in the component of the present invention has a through hole into which the H-shaped steel for guide standing on the pile head of the parent pile can be inserted with a space at the center rear surface, The inside of the through hole has a shape that narrows from four directions toward the center, and the embedded retaining wall PC plate is stacked on the pile head of the parent pile or on the upper part of the anchor weight member from the top to the through hole. When concrete is placed, support pillars for the embedded retaining wall in which the guide H-shaped steel is the core material are configured in the through hole.

  In addition, the rectangular retaining wall PC plate, which constitutes an important embedded retaining wall in the constituent elements of the present invention, has a through-hole on the center back surface through which a guide reinforcing bar column standing on the pile head of the parent pile can be inserted with ease. The inside of the through-hole has a shape that narrows from four directions toward the center, and the embedded retaining wall PC plate is stacked on the pile head of the parent pile or the upper part of the anchor weight member to the through-hole. When concrete is cast from the upper part, support pillars for the embedded retaining wall in which the guide reinforcing bars are the core material are configured in the through holes.

  Further, the rectangular retaining wall PC plate constituting the embedded retaining wall important in the component of the present invention has a through hole communicating with the base of the main pile on the back surface of the center, and the inside of the through hole faces the center. When the concrete is placed from above into the through hole in a state where the embedded retaining wall PC plate is laminated on the pile head of the parent pile or the upper part of the anchor weight member, the embedded retaining wall PC plate is embedded in the through hole. The wall support strut is configured.

  Therefore, in the present invention, the combination of the existing retaining wall described above, a newly provided rising wall, an embedded retaining wall, and a supporting column for supporting and fixing the embedded retaining wall has solved the problem.

  In the construction method of the present invention, a plurality of parent piles with guide H-shaped steel standing on the back side of an existing retaining wall to be reinforced are driven in parallel, and the pile of the parent pile is removed except for the soil on the back side of the existing retaining wall. Retaining wall that adjusts the head position and installs an embedded retaining wall supported by a pillar with H-shaped guide steel as a core on the pile head of the parent pile, and overlaps with the existing retaining wall on the back inner side of the existing retaining wall An anchor weight member is provided at the top end portion of the embedded retaining wall so as to connect the heads to each other, and at the L-shaped edge portion of the anchor weight member, the upper peripheral edge portion of the existing retaining wall The existing retaining wall is reinforced by wearing

  And, as another construction method, the present invention, as another construction method, drives a plurality of parent piles in which H-shaped steel for guide is erected in parallel on the back side of the upper existing retaining wall to be removed and the lower existing retaining wall to be reinforced, The pile head position of the parent pile is adjusted except for the soil on the back side of the wall and the lower existing retaining wall, and the embedded retaining wall is supported on the pile head of the parent pile by a column with H-shaped steel for guide as a core material An anchor weight member constructed to connect the respective heads at the top end portion of the embedded retaining wall is provided, and an edge portion around the upper portion of the lower existing retaining wall at the L-shaped edge portion of the anchor weight member And an embedded retaining wall that is supported by a support pillar of which the H-shaped steel for guide is a core material is laminated again on the upper surface of the anchor weight member to compensate for the height of the removed upper retaining wall, and Providing a construction method to install a rising wall to replace the retaining wall It was.

  Thus, according to the present invention, in the reinforcement work of the retaining wall in a narrow residential land development site, the amount of movement of the soil is reduced to improve the efficiency, and the work can be performed quickly and inexpensively. In addition, the present invention only stakes or digs the rear side of the existing retaining wall as a construction area, and the road in front of the retaining wall is not required to be used except for loading and unloading materials. The reinforcement work can be carried out by the work on the back side of the retaining wall, that is, in the residential land, and can exhibit a remarkable effect particularly in a narrow residential land development site.

  Furthermore, the present invention is configured to receive the earth pressure originally received by the existing retaining wall and the newly built rising wall entirely by the embedded retaining wall provided in front of the retaining wall. Retaining wall reinforcement structure that can protect the rising wall to be built from earth pressure.

  Furthermore, the retaining wall reinforcement method of the present invention does not change the front surface of the existing retaining wall, and can be used for reinforcement work such as stone walls having a cultural property value.

(A) It is a top view which shows the shape of the retaining wall PC board for embedding used for this invention. (B) It is a front view which shows the shape of the retaining wall PC board for embedding used for this invention.   It is a perspective explanatory view which shows the support method of the retaining wall PC board for embedding shown in FIG. (A) It is construction procedure explanatory drawing which shows Example 1 of this invention. (B) It is construction procedure explanatory drawing which shows Example 1 of this invention.   It is sectional drawing explaining Example 1 of this invention. (A) It is construction procedure explanatory drawing which shows Example 2 of this invention. (B) It is construction procedure explanatory drawing which shows Example 2 of this invention. (C) It is construction procedure explanatory drawing which shows Example 2 of this invention. (D) It is construction procedure explanatory drawing which shows Example 2 of this invention. (E) It is construction procedure explanatory drawing which shows Example 2 of this invention. (F) It is construction procedure explanatory drawing which shows Example 2 of this invention. (G) It is construction procedure explanatory drawing which shows Example 2 of this invention.   It is a principal part cross-sectional perspective view explaining Example 2 of this invention.   It is explanatory drawing which shows the example of a shape of the existing retaining wall reinforced in this invention.   It is another explanatory drawing which shows the example of a shape of the existing retaining wall reinforced in this invention.

  The shape of the embedded retaining wall used in the present invention and the method for fixing the supporting column for the retaining wall are extremely important in the components of the present invention. The rectangular retaining wall PC plate constituting the embedded retaining wall is The guide H-shaped steel standing up on the pile head of the parent pile on the back surface has a through hole that can be inserted with ease, and the inside of the through hole has a shape that narrows from four sides toward the center, When concrete is placed into the through hole from the top with the embedded retaining wall PC plate laminated on the pile head of the parent pile or the upper part of the anchor weight member, the embedded retaining wall is supported by the H-shaped steel for the guide in the through hole. The support pillar is configured.

  Further, the rectangular retaining wall PC plate constituting the embedded retaining wall of the present invention has a through hole into which a reinforcing bar for guide standing on the pile head of the parent pile can be inserted with a space on the center back surface. The inside of the slab has a shape that narrows from the four sides toward the center, and concrete is struck from above into the through hole in a state where the embedded retaining wall PC plate is laminated on the pile head of the parent pile or the upper part of the anchor weight member. If provided, support struts for embedded retaining walls in which the guide reinforcing bars are used as cores may be formed in the through holes.

  Furthermore, the rectangular retaining wall PC plate constituting the embedded retaining wall of the present invention has a through hole communicating with the base of the main pile on the back surface of the center, and the inside of the through hole narrows from the four sides toward the center. When the concrete is placed from above into the through hole in a state where the embedded retaining wall PC plate is laminated on the pile head of the main pile or the upper part of the anchor weight member, a supporting column for the embedded retaining wall is placed in the through hole. May be configured.

  Thus, the present invention comprises the rectangular retaining wall PC plate constituting the embedded retaining wall, the main pile and the column supporting the retaining wall PC plate, and the guide H on the back side of the existing retaining wall to be reinforced. A plurality of parent piles with standing steel are driven in parallel, the pile head position of the parent pile is adjusted except for the soil on the back side of the existing retaining wall, and the guide H-shaped steel is placed on the pile head of the parent pile. An embedded retaining wall (retaining wall PC plate) supported by a supporting column as a core material is installed to construct a retaining wall overlapping the existing retaining wall on the inner side of the back surface of the existing retaining wall.

  An anchor weight member is provided at the top end of the embedded retaining wall to connect the heads to each other, and the upper peripheral edge of the existing retaining wall is crowned by the L-shaped edge of the anchor weight member. By doing so, the existing retaining wall is reinforced.

  In addition, the present invention drives in parallel a plurality of main piles with H-shaped steel for guides installed on the back side of the upper existing retaining wall to be removed and the lower existing retaining wall to be reinforced. An embedded retaining wall (retaining wall PC plate) in which the pile head position of the parent pile is adjusted except for the soil on the back side of the retaining wall, and the H-shaped steel for guide is supported on the pillar head of the parent pile by a column as a core material And an anchor weight member configured to connect the heads to each other at the top end of the embedded retaining wall.

  Then, the existing retaining wall is reinforced by attaching an edge around the upper portion of the lower existing retaining wall at the L-shaped edge of the anchor weight member, and at the same time, the upper surface of the anchor weight member is used as a guide. Retaining wall having a structure in which an embedded retaining wall supported by a column of H-shaped steel as a core material is laminated again to compensate for the height of the removed upper retaining wall, and a rising wall is provided instead of the retaining wall A retaining wall is provided, and an embedded retaining wall is newly provided in the rear inner side of the lower existing retaining wall and the rising wall that replaces the removal retaining wall. Protects against earth pressure.

  The first embodiment of the present invention reinforces the existing retaining wall 51 described with reference to FIG. 7. In FIGS. 1 to 4, FIG. 1A is an embedding for use in the present invention. FIG. 1B is a front view showing the shape of an embedding retaining wall PC plate used in the present invention, and FIG. 2 is an embedding retaining wall PC shown in FIG. FIG. 3 (A), FIG. 3 (B), and FIG. 4 are construction procedure explanatory views of the first embodiment.

  In FIG. 1 to FIG. 4, 1 is a retaining wall PC plate constituting an embedded retaining wall, 2 is a through hole for forming a column formed on the central back surface of the retaining wall PC plate 1, and the internal shape of the through hole 2 Has, for example, a rectangular shape 3 that narrows from four directions toward its center. In addition, 4 is a manufacturing work sheet used when producing the retaining wall PC board, 5 is a construction work sheet used during production, and 6 is used for fitting with other retaining wall PC boards when constructing the retaining wall PC board. A guide pin 7 is a notch for draining that constitutes a drain hole.

  FIG. 2 shows that the main piles 9a, 9b, and 9c are previously placed in parallel on the back side of the existing retaining wall, that is, the underground 8 on the residential land side, and the parent piles 9a, 9b, and 9c are for guide H-shaped steels 10a, 10b, and 10c are erected. The pile heads 11a, 11b, and 11c of the parent piles 9a, 9b, and 9c are adjusted in position (mainly height adjustment) with a chisel or the like in some cases, and the guide H-shaped steels 10a, 10b, and 10c are erected on the top. The retaining wall PC plates 1a, 1b and 1c having the through holes 2a, 2b and 2c, respectively, are installed.

  Thus, the retaining walls 1a, 1b, 1c installed on the pile heads 11a, 11b, 11c of the parent piles 9a, 9b, 9c penetrate the guide H-shaped steels 10a, 10b, 10c with a space. Concrete is placed in each of the through holes 2a, 2b, and 2c, and support struts 12a, 12b, and 12c for fixing and supporting the parent piles 9a, 9b, and 9c and the retaining walls 1a, 1b, and 1c are configured.

  3 (A) (B) and FIG. 4 explain the construction procedure of Example 1, and FIG. 3 (A) (B) and FIG. 4 are explanatory diagrams of a conventional example. The state which implemented Example 1 of the present invention to the existing retaining wall of Drawing 7 is shown.

  3 (A), (B), and FIG. 4, 1 is a retaining wall PC plate constituting an embedded retaining wall, 2 is a through hole, 5 is a construction roof, and 13 is an existing retaining wall (such as Oyaishi). 14 is a lower base of an existing retaining wall, 15 is a road surface, 16 is backfill concrete, 17 is a top edge, and 18 is a residential land.

  3A, the housing land 18 corresponding to the back surface of the existing retaining wall 13 is excavated, and the parent pile 9 is driven as described with reference to FIG. The retaining wall PC plate 1 constituting the embedded retaining wall is wound by a heavy machine, and a guide H-shaped steel 10 is inserted into the through hole 2 of the retaining wall PC plate 1 so that the main pile 9 is formed as shown in FIG. It is installed on the pile head 11.

  FIG. 4 shows concrete in which a concrete is placed in the through hole 2 of the retaining wall PC plate 1 through which the guide H-shaped steel 10 penetrates, and the retaining wall PC plate 1 is fixedly integrated with the parent pile 9. A U-shaped anchor weight 19 is made of reinforced concrete at the top.

  Thus, the U-shaped anchor weight 19 connects the top end portions of the retaining wall PC plates 1a, 1b, 1c... Of the embedded retaining wall between the supporting columns 12a, 12b, 12c. In addition to the role, the existing retaining wall 13 is reinforced by crowning the upper peripheral edge 21 of the existing retaining wall 13 with the L-shaped edge 20 of the anchor weight 19. Reference numeral 22 denotes backfill soil for the residential land 18.

  Thus, in Example 1, a plurality of main piles 9 in which the guide H-shaped steel 10 is erected on the back side of the existing retaining wall 13 to be reinforced are driven in parallel, and the soil on the back side of the existing retaining wall 13 is removed. Except for adjusting the position of the pile head 11 of the parent pile 9, the embedded retaining wall PC plate 1 on which the guide H-shaped steel 10 is supported on the pile head 11 of the parent pile 9 by a supporting column 12 serving as a core material. The retaining wall which overlaps with the existing retaining wall 13 is constructed on the back inner side of the existing retaining wall 13.

  An anchor weight 19 member is provided at the top end of the embedded retaining wall PC plate 1 so as to connect the support struts 12 between the heads. The existing retaining wall 13 is reinforced by attaching the peripheral edge 21 of the upper part of the wall 13. In the first embodiment, the anchoring of the upper part of the existing retaining wall 13 by the anchor weight 19 and the embedded retaining wall are performed. The existing retaining wall 13 is reinforced by defending the residential land 18 with the earth pressure on the PC board 1.

  Moreover, the rectangular retaining wall PC board 1 which comprises the embedding retaining wall of Example 1 is replaced with the guide reinforcement column (H-shaped steel 10 for guides) erected on the pile head 11 of the parent pile 9 in the center back surface. ) Has a through-hole 2 that can be inserted with ease, and the inside of the through-hole 2 has a shape that narrows from four directions toward the center, and the embedded retaining wall PC plate 1 is connected to the pile head of the parent pile 9. When concrete is cast into the through hole 2 in a state of being laminated on the 11 or the anchor weight 19 member from above, the supporting column 12 for the embedded retaining wall in which the reinforcing bar material for guide becomes the core material is configured in the through hole 2. You may be made to do.

  Furthermore, the rectangular retaining wall PC board 1 constituting the embedded retaining wall of Example 1 has a through hole 2 communicating with the base of the main pile 9 on the back surface of the center, and the inside of the through hole 2 faces the center thereof. When the concrete is placed from above into the through hole 2 in a state where the embedded retaining wall PC plate 1 is laminated on the pile head 11 of the parent pile 9 or the upper part of the anchor weight 19 member. In the through hole 2, a supporting column 12 for the embedded retaining wall may be configured.

  Furthermore, in the first embodiment, a plurality of parent piles 9 in which the H-shaped steel for guide 10 is erected is driven in parallel on the back side of the existing retaining wall 13 to be reinforced, and the soil on the back side of the existing retaining wall 13 is removed Then, the pile head position 11 of the parent pile 9 is adjusted, and the embedded retaining wall PC plate 1 is installed on the pile head 11 of the parent pile 9 and the guide H-shaped steel 10 is supported by the supporting struts 12 as the core material. Then, a retaining wall overlapping with the existing retaining wall 13 is constructed on the back inner side of the existing retaining wall 13, and the heads of the supporting columns 12 are connected to the top end portion of the embedded retaining wall PC plate 1. An anchor weight 19 member is provided, and a reinforcing method for the existing retaining wall 13 is provided, wherein the upper peripheral edge 21 of the existing retaining wall 13 is crowned by the L-shaped edge 20 of the anchor weight 19 member. Retaining wall PC constituting the embedded retaining wall used in the first embodiment 1, as a means for reinforcing the existing retaining wall 13, it is needless to say that possible configuration to be installed in front of the existing retaining wall 13.

  Thus, also in Example 2, an important component of the present invention is the relationship between the main pile 9 shown in FIG. 2 and the retaining wall PC plates 1a, 1b, 1c constituting the embedded retaining wall, FIG. 2 shows that the main piles 9a, 9b, and 9c are previously placed in parallel on the back side of the existing retaining wall, that is, the underground 8 on the residential land side, and the parent piles 9a, 9b, and 9c are for guide H-shaped steels 10a, 10b, and 10c are erected. The pile heads 11a, 11b, and 11c of the parent piles 9a, 9b, and 9c are adjusted in position (mainly height adjustment) with a chisel or the like in some cases, and the guide H-shaped steels 10a, 10b, and 10c are erected on the top. The retaining wall PC plates 1a, 1b and 1c having the through holes 2a, 2b and 2c, respectively, are installed.

  Retaining walls 1a, 1b, and 1c installed on the pile heads 11a, 11b, and 11c of the parent piles 9a, 9b, and 9c penetrate through the guide H-shaped steels 10a, 10b, and 10c with a space. Concrete is placed in the holes 2a, 2b and 2c to form support struts 12a, 12b and 12c for fixing and supporting the main piles 9a, 9b and 9c and the retaining walls 1a, 1b and 1c.

  Thus, the second embodiment of the present invention reinforces the existing retaining wall 51a described with reference to FIG. 8, and FIGS. 5 and 6 are construction procedure explanatory diagrams of the second embodiment.

  5A to 5G, 1 is a retaining wall PC plate constituting an embedded retaining wall, 2 is a through hole provided in the retaining wall PC plate 1, 5 is a construction deck, 9 is a parent pile, Is an H-shaped steel for guide, 11 is a pile head, 12 is a support column, 14 is a lower base, 23 is an upper base, 24 is a removal retaining wall, and 13 is an existing retaining wall to be reinforced.

  FIG. 5 (A) shows that the main pile 9 is driven as shown in FIG. 2 on the back side of the existing retaining wall 13 and the removal retaining wall 24, that is, on the residential land 18 side, and the parent pile 9 is used as a guide. The H-shaped steel 10 is erected.

  FIG. 5B shows a state where the upper part of the existing retaining wall 13 is excavated and the removed retaining wall 24 is removed. FIG. 5 (C) still excavates the residential land 18 corresponding to the back surface of the existing retaining wall 13, adjusts the position of the pile head 11 of the parent pile 9 and prepares to install the retaining wall PC plate 1. The retaining wall PC plate 1 constituting the embedded retaining wall is piled by a heavy machine, and a guide H-shaped steel 10 is inserted into the through hole 2 of the retaining wall PC plate 1 so that the retaining wall PC plate is placed on the pile head 11 of the parent pile 9. 1 is installed as shown in FIG.

  FIG. 5 (E) shows that the retaining wall PC plate 1 constituting the embedded retaining wall is backfilled with the backfill soil 22, and the through hole 2 of the retaining wall PC plate 1 through which the guide H-shaped steel 10 penetrates in FIG. 5 (F). Concrete is placed on the retaining wall PC plate 1 so that the retaining wall PC plate 1 is fixedly integrated with the main pile 9, and at the same time, a U-shaped anchor weight 19 is made of reinforced concrete on the retaining wall PC plate 1.

  Thus, the U-shaped anchor weight 19 connects the top end portions of the retaining wall PC plates 1a, 1b, 1c... Of the embedded retaining wall between the supporting columns 12a, 12b, 12c. In addition to the role, the existing retaining wall 13 is reinforced by crowning the upper peripheral edge 21 of the existing retaining wall 13 with the L-shaped edge 20 of the anchor weight 19.

  FIG. 5 (G) shows that a rising wall 25 is installed at the position of the removed retaining wall 24 removed from the upper surface of the U-shaped anchor weight 19, and an embedded retaining wall is formed on the back surface of the rising wall 25 by heavy equipment. The retaining wall PC board 1 is installed. The retaining wall PC plate 1 is constructed as shown by an imaginary line in FIG. 5G by inserting the guide H-shaped steel 10 into the through hole 2 of the retaining wall PC plate 1.

  FIG. 6 shows concrete by placing concrete in the through-hole 2 of the retaining wall PC plate 1 to form a supporting column 12, and the supporting column 12 forms a retaining wall PC plate 1 that constitutes an embedded retaining wall. Are integrated. In addition, 22 showed the backfill soil, FIG. 6 strengthened the existing retaining wall 13, and secured the embankment height of the removal retaining wall 24 with the rising wall 25. FIG.

  Thus, Example 2 includes the rectangular retaining wall PC plate 1 constituting the embedded retaining wall, the parent pile 9 that supports the retaining wall PC plate, and the supporting struts 12, and the existing retaining wall 13 that is reinforced. Driving a plurality of parent piles 9 in which the guide H-shaped steel 10 is erected on the back side in parallel, adjusting the position of the pile head 11 of the parent pile 9 except for the soil on the back side of the existing retaining wall 13; An embedded retaining wall 1 (retaining wall PC plate), in which a guide H-shaped steel 10 is supported by a supporting column 12 serving as a core material, is installed on a pile head 11 of the parent pile 9 and a rear inner side of an existing retaining wall 13 The embedded retaining wall 1 that overlaps the existing retaining wall 13 is constructed.

  And the anchor weight member of the structure which connects between each support support | pillar 12 is provided in the top end part of the said embedded retaining wall 1, and the upper periphery edge part of the said existing retaining wall in the L-shaped edge part of this anchor weight member The existing retaining wall will be reinforced by wearing

  In addition, the present invention drives in parallel a plurality of main piles with H-shaped steel for guides installed on the back side of the upper existing retaining wall to be removed and the lower existing retaining wall to be reinforced. An embedded retaining wall (retaining wall PC plate) in which the pile head position of the parent pile is adjusted except for the soil on the back side of the retaining wall, and the H-shaped steel for guide is supported on the pillar head of the parent pile by a column as a core material ), And an anchor weight 19 member is provided at the top end of the embedded retaining wall.

  The anchor weight 19 is reinforced by attaching the edge 21 around the upper portion of the lower existing retaining wall 13 to the L-shaped edge 20 of the anchor weight 19 member. The embedded retaining wall 1 supported by the supporting struts 12 with the guide H-shaped steel 10 as the core material is laminated again on the upper surface of the steel plate to compensate for the height of the removed retaining wall 24 and the removed retaining wall 24. A retaining wall reinforcement structure having a structure in which a rising wall 25 is provided instead of the lower retaining wall 13 and an inner surface of the rear surface of the rising wall 25 that replaces the removal retaining wall 24 is provided as an embedded retaining wall. 1 is newly provided in an overlapping shape, and protects the existing retaining wall 24 and the rising wall 25 from earth pressure.

DESCRIPTION OF SYMBOLS 1 1a, 1b, 1c Retaining wall PC board 2a, 2b, 2c which comprises an embedding retaining wall Through-hole 3 U-shape 4 Manufacturing Dah 5 Construction Dah 6 Guide pin 7 Drainage hole notch 8 Underground 9 9a, 9b, 9c Parent pile 10 10a, 10b, 10c H-shaped steel for guide 11 11a, 11b, 11c Pile head 12 12a, 12b, 12c Support column 13 Existing retaining wall 14 Lower base 15 Road surface 16 Backfill concrete 17 Top edge 18 Housing land 19 Anchor weight 20 L-shaped edge 21 Upper peripheral edge 22 Backfill soil 23 Upper base 24 Removal retaining wall 25 Rising wall 50 Road 51 51a, 51b Retaining wall 52a, 52b, 52c ... Retaining Wall block 53 Base 54 Backfilling soil 55 Backfilling stone 56 Backfilling concrete 57 Housing land 58 Water drain hole 59 Top edge 60 Oyaishi 61 Machiishi 62 Lower base Third upper base

(A) It is a top view which shows the shape of the retaining wall PC board for embedding used for this invention. (B) It is a front view which shows the shape of the retaining wall PC board for embedding used for this invention. It is a perspective explanatory view which shows the support method of the retaining wall PC board for embedding shown in FIG. (A) (B) It is construction procedure explanatory drawing which shows Example 1 of this invention. It is sectional drawing explaining Example 1 of this invention. (A) (B) (C) (D) (E) (F) (G) It is construction procedure explanatory drawing which shows Example 2 of this invention. It is a principal part cross-sectional perspective view explaining Example 2 of this invention. It is explanatory drawing which shows the example of a shape of the existing retaining wall reinforced in this invention. It is another explanatory drawing which shows the example of a shape of the existing retaining wall reinforced in this invention.

Claims (7)

  Driving a plurality of parent piles with guide H-shaped steel standing upright on the back side of the existing retaining wall to be reinforced, adjusting the pile head position of the parent pile excluding the soil on the back side of the existing retaining wall; On the pile head of the parent pile, an embedded retaining wall that is supported by a supporting column that is made of a supporting H-shaped steel as a core material is installed to construct a retaining wall that overlaps the existing retaining wall on the back inner side of the existing retaining wall; An anchor weight member is provided at the top end portion of the embedded retaining wall so as to connect the support struts between the heads, and the L-shaped edge portion of the anchor weight member crowns the upper peripheral edge portion of the existing retaining wall. Reinforcement structure of existing retaining wall, characterized by wearing.   A plurality of main piles with H-shaped steel for guides are driven in parallel on the rear side of the upper existing retaining wall to be removed and the lower existing retaining wall to be reinforced, and soil on the rear side of the upper existing retaining wall and the lower existing retaining wall. The pile head position of the parent pile is adjusted, and an embedded retaining wall in which the H-shaped steel for guide is supported by a supporting column that becomes a core material on the pile head of the parent pile is constructed. An anchor weight member configured to connect the support struts between the support struts is provided at the end portion, and an edge portion around the upper portion of the lower existing retaining wall is attached to the L-shaped edge portion of the anchor weight member. On the upper surface of the anchor weight member, an embedded retaining wall supported by a support H-shaped steel as a core material is laminated again to compensate for the height of the removed upper retaining wall, and instead of the removed retaining wall. Reinforced structure of existing retaining wall, characterized by the provision of rising walls   The rectangular retaining wall PC plate constituting the embedded retaining wall has a through hole in the center back surface through which a guide H-shaped steel standing on the pile head of the parent pile can be inserted with ease, and the inside of the through hole is the center When the concrete is driven from above into the through hole in a state where the embedded retaining wall PC plate is laminated on the pile head of the parent pile or the upper part of the anchor weight member, the concrete is placed in the through hole. The reinforcing structure for an existing retaining wall according to claim 1 or 2, wherein a supporting strut for the embedded retaining wall, in which the H-shaped steel for guide is a core material, is configured.   The rectangular retaining wall PC plate that constitutes the embedded retaining wall has a through hole in the back of the center on which the reinforcing bar for guide standing on the pile head of the parent pile can be inserted with a space, and the inside of the through hole is the center When the concrete is driven from above into the through hole in a state where the embedded retaining wall PC plate is laminated on the pile head of the parent pile or the upper part of the anchor weight member, the concrete is placed in the through hole. The reinforcing structure for an existing retaining wall according to claim 1 or 2, characterized in that a supporting column for the embedded retaining wall in which the reinforcing bar material for the guide serves as a core material is formed.   The rectangular retaining wall PC plate constituting the embedded retaining wall has a through hole communicating with the base of the main pile on the back surface of the center, and the inside of the through hole has a shape that narrows from four sides toward the center. When concrete is placed from above into the through hole in a state where the embedded retaining wall PC plate is laminated on the pile head of the parent pile or the upper part of the anchor weight member, a supporting column for the embedded retaining wall is configured in the through hole. The reinforcing structure of the existing retaining wall according to claim 1 or 2, characterized by the above-mentioned.   Driving a plurality of parent piles with guide H-shaped steel standing upright on the back side of the existing retaining wall to be reinforced, adjusting the pile head position of the parent pile excluding the soil on the back side of the existing retaining wall; On the pile head of the parent pile, an embedded retaining wall that is supported by a supporting column that is made of a supporting H-shaped steel as a core material is installed to construct a retaining wall that overlaps the existing retaining wall on the back inner side of the existing retaining wall; An anchor weight member is provided at the top end portion of the embedded retaining wall so as to connect the support struts between the heads, and the L-shaped edge portion of the anchor weight member crowns the upper peripheral edge portion of the existing retaining wall. Reinforcement method of existing retaining wall characterized by wearing. A plurality of main piles with H-shaped steel for guides are driven in parallel on the rear side of the upper existing retaining wall to be removed and the lower existing retaining wall to be reinforced, and soil on the rear side of the upper existing retaining wall and the lower existing retaining wall. The pile head position of the parent pile is adjusted, and an embedded retaining wall in which the H-shaped steel for guide is supported by a supporting column that becomes a core material on the pile head of the parent pile is constructed. An anchor weight member configured to connect the heads to each other is provided at an end, and an edge around the upper portion of the lower existing retaining wall is crowned by an L-shaped edge of the anchor weight member, and the anchor weight On the upper surface of the member, an embedded retaining wall supported by supporting pillars made of supporting H-shaped steel as a core material is laminated again to compensate for the height of the removed upper retaining wall, and in place of the removed retaining wall. Reinforcement method for existing retaining walls, characterized by the provision of rising walls