JP2008180082A - Construction method of wall structure having permanent anchor and wall structure having permanent anchor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To construct a wall structure having a permanent anchor installed in the ground without using a temporary anchor. <P>SOLUTION: A soldier pile 10 is installed, and then an anchor fixing member 12 composed of reinforced concrete is constructed on the soldier pile 10. A slant type permanent anchor 14 is installed and tensed with excavating the ground inside the solder pile 10, and fixed to the anchor fixing member 12. The processes are repeated. After the installation work of the permanent anchor 14 is completed, concrete for the wall structure 16 is placed and integrated with the anchor fixing member 12. In another embodiment, the anchor fixing member is made of steel, and is embedded in concrete for integration. In this case, after concrete is placed, the permanent anchor 14 is released from tension, and tensed again. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a wall structure construction method in which a permanent anchor is constructed and a wall structure in which a permanent anchor is constructed.

  For example, when building a wall structure such as a building outer wall or retaining wall on an inclined land, it is common to perform a mountain construction using an oblique temporary anchor and then perform a wall construction work (see, for example, Patent Document 1) ). In the temporary anchor described in this Patent Document 1, after mounting a steel material for mountain retaining, an earth anchor made of a steel rod is obliquely embedded in the ground of an inclined ground, and the end of this earth anchor is fixed to the steel material for mountain retaining by a stopper. is doing.

On the other hand, Patent Document 2 discloses a construction method for constructing a structure without using a temporary anchor by constructing an oblique permanent anchor on a pile pile and applying earth pressure to the permanent anchor. Yes. In this construction method, a structure is constructed one by one from the top, and a permanent anchor is constructed every time construction of each stage is completed, so that earth pressure is borne.
JP-A-62-63722 JP-A-5-202527

  However, the construction without using a temporary anchor is to load earth pressure only on the pile pile when rooting under the oblique permanent anchor, and when the root cutting depth increases. It is not practical because the deformation of the pile pile will increase. Therefore, conventionally, when constructing a wall structure on an inclined land, a temporary anchor has to be used.

  When constructing a wall structure using an oblique temporary anchor as disclosed in Patent Document 1, the temporary anchor is removed while the wall structure is being constructed in order to reuse the temporary anchor and the steel for retaining the mountain. It is normal to dismantle and remove steel for steel. However, if a temporary anchor or the like is removed, a large earth pressure acts on the wall structure. Therefore, it is conceivable to construct a permanent anchor on the constructed wall so that the wall structure can withstand such earth pressure.

  FIG. 24 is a cross-sectional view showing a configuration in which a wall structure is constructed using a permanent anchor after mountain mounting using a temporary anchor, and FIG. 25 is a front view seen from the left side of FIG. The construction procedure of the wall structure will be described with reference to these drawings. First, the pile retaining pile 50 is placed, and the ground inside the pile retaining pile 50 (left side in FIG. 16) is rooted. When the root cutting depth reaches the uppermost temporary anchor construction position, a steel erection 52 is attached to the pile pile 50, and a pedestal 54 for fixing the temporary anchor is fixed to the erection 52. Then, the uppermost temporary anchor 56 a is constructed and fixed to the base 54. Thereafter, such root cutting and construction of the temporary anchor 56 are repeated up to the lowermost temporary anchor 56c.

  When the construction of the temporary anchor 56 is completed, flooring is performed. Then, the floor concrete 58 is placed, and the temporary anchor 56 is sequentially removed from the bottom while placing the wall structure 60 upward from the floor concrete 58. That is, in the example of FIG. 16 and FIG. 17, the bottom temporary anchor 56c, the flank 52, and the pedestal 54 are removed and then the floor concrete 58 is placed, and the next temporary anchor 56b and the like are removed before the wall. The lowermost portion of the structure 60 is driven, and the uppermost temporary anchor 56a and the like are removed, and then the remaining portion of the wall structure 60 is driven. In addition, while the wall structure 60 is driven, the oblique permanent anchor 62 is also constructed. Thus, the construction of the wall structure 60 is completed.

  As described above, in the construction shown in FIGS. 24 and 25, the construction and removal of the temporary anchor 56 and the like are required, which increases the construction cost and lengthens the construction. Furthermore, since the space between the mountain retaining pile 50 and the wall structure 60 is narrow, temporary removal work is extremely difficult. In addition, the removal work of the temporary anchor 56 or the like or the outer wall formwork work must be performed in parallel with the construction of the wall structure 60 and the permanent anchor 62, so the work is congested and work efficiency is deteriorated.

  In addition, since both the temporary anchor 56 and the permanent anchor 62 are constructed, the number of anchor constructions increases, which also increases the cost and lengthens the construction, and makes it difficult to perform efficient anchor placement planning. There is also.

  This invention is made | formed in view of said point, and it aims at enabling it to construct | assemble a wall structure in the ground, without using a temporary anchor and a raising.

  In order to achieve the above object, a method for constructing a wall structure in which a permanent anchor according to the first aspect of the present invention is constructed is a method in which a anchor is placed, a ground inside the anchor is rooted, An anchor fixing member for fixing and fixing an anchor is constructed on the mountain stop, an oblique anchor is placed, the anchor is fixed and fixed to the anchor fixing member, and then a concrete wall is integrated with the anchor fixing member. It is characterized by being placed so that

  According to the present invention, the anchor fixing member is constructed in a mountain stop, and the anchor is fixedly fixed to the anchor fixing member, so that the earth pressure at the time of root cutting can be reliably borne by the anchor. Moreover, since the concrete having a wall structure is cast so as to be integrated with the anchor fixing member, the anchor can be used as a permanent anchor. Therefore, according to the present invention, a wall structure can be constructed while bearing earth pressure only with a permanent anchor without using a temporary anchor. Further, since the anchor fixing member functions as an erection, it is not necessary to use a temporary erection. Examples of the wall structure in the present invention include a building outer wall, an outer wall of a building dry area, and a retaining wall provided on an inclined ground.

  According to a second aspect of the present invention, in the method according to the first aspect, the anchors are provided in a plurality of stages, and the ground is rooted from the upper stage side to the lower stage side for each stage. After the construction, the anchor placement and fixing, and the construction of all the anchors are completed, the wall structure concrete is placed.

  According to a third aspect of the present invention, in the method of the first or second aspect, the wall structure is reinforced concrete, and the anchor fixing member is constructed of reinforced concrete.

  According to a fourth aspect of the present invention, in the method according to the third aspect, before the concrete having the wall structure is placed, the reinforcing bar of the anchor fixing member and the reinforcing bar of the wall structure are joined. It is characterized by. In this way, the integrity of the wall structure can be enhanced by further strengthening the integrity of the wall structure and the anchor fixing member.

  Further, the invention described in claim 5 is characterized in that the wall structure is a steel concrete structure, and the anchor fixing member is constructed of steel concrete.

  According to a sixth aspect of the present invention, the wall structure is a steel reinforced concrete structure, and the anchor fixing member is constructed of a steel reinforced concrete.

  The invention described in claim 7 is the method according to claim 3 or 4, wherein a projecting member projecting inward of the root cutting portion is provided at a site where the anchor fixing member of the mountain fixing is constructed, The concrete of the anchor fixing member is placed so that the protruding member is embedded in the anchor fixing member. In this way, the projecting member provided on the mountain retaining member is embedded in the anchor fixing member, so that the anchor fixing member and the mountain retaining member can be integrated.

  The invention described in claim 8 is the method according to any one of claims 1 to 7, wherein the crushed stone is formed in a space between the outer peripheral surface of the wall structure and the inner surface of the ground which has been rooted. And a water drain pipe penetrating between the inner side surface and the outer side surface of the wall structure. If it does in this way, the water in a ground can be discharged | emitted inside a wall structure via a crushed stone and a drain pipe.

  Further, the invention described in claim 9 is the method according to claim 8, wherein a holding plate having water permeability is attached to an upper position of a construction site of the anchor fixing member to the mountain stopper and is mounted on the holding plate. The crushed stone is installed, and the anchor fixing member is provided with a drain pipe that penetrates the anchor fixing member. If it does in this way, the water which exuded to the crushed stone from the ground can be guide | induced to the crushed stone of a lower stage through the drain pipe of an anchor fixing member, and the water of a ground can be drained more effectively.

  The invention described in claim 10 is the method according to any one of claims 1 to 9, wherein the anchor fixing member is made of a steel material. In this way, since the integration with the concrete can be achieved simply by burying the anchor fixing member in the concrete, the process for integrating the concrete and the anchor fixing member can be simplified.

  The invention described in claim 11 is the method according to any one of claims 1 to 10, wherein after fixing the anchor to the anchor fixing member, the step of releasing the tension, and the wall structure And re-tensioning after placing the concrete. In this way, by relaxing the tension of the anchor, a part of earth pressure can be borne by the concrete of the wall structure, and then the concrete of the wall structure and the anchor fixing member are re-tensioned. It can be integrated more firmly.

  Further, in the wall structure in which the permanent anchor according to the invention described in claim 12 is constructed, an anchor fixing member for fixing and fixing the anchor is constructed on a mountain stopper placed on the ground, and the anchor fixing member is attached to the anchor fixing member. The anchor is fixedly fixed, and the concrete of the wall structure is placed so as to be integrated with the anchor fixing member.

  According to a thirteenth aspect of the present invention, in the wall structure of the twelfth aspect, the anchor fixing member is made of a concrete member or a steel material.

  According to the present invention, it is possible to construct a wall structure in which a permanent anchor is constructed in the ground without using a temporary anchor or an upset.

  FIG. 1 is a cross-sectional view showing a reinforced concrete wall structure constructed by construction work of a wall structure according to an embodiment of the present invention, and FIG. 2 is a front view of the wall structure of FIG. FIG. 3 is an enlarged front view (part III in FIG. 2) showing the permanent anchor construction part in FIG. 2, FIG. 4 is a sectional view taken along line IV-IV in FIG. 1, and FIG. It is V sectional drawing.

  As shown in these drawings, the structure according to the present embodiment is roughly composed of a pile pile 10, an anchor fixing member 12 attached to the pile pile 10, and an oblique permanent anchor 14 fixed to the anchor fixation member 12. And a wall structure 16 that is integrally formed with the anchor fixing member 12 and a floor portion 18 that is integral with the wall structure 16. The wall structure 16 is, for example, a building outer wall, an outer wall of a dry area, or a retaining wall. Although FIG. 1 shows a case where three stages of permanent anchors 14 (in the order from the top, permanent anchors 14a, 14b, 14c) are shown, the number of stages of permanent anchors 14 is not limited to this.

  The pile retaining pile 10 is made of, for example, H-shaped steel, and a plurality of piles are placed on the ground along the outer wall surface of the wall structure 16. The anchor fixing member 12 is a reinforced concrete member and extends in a beam shape in the horizontal direction across the plurality of piled piles 10. Therefore, the anchor fixing member 12 also has a role as an abdomen that transmits the tension of the permanent anchor 14 to the pile pile 10.

  In the present embodiment, the space between the pile pile 10 and the wall structure 16 is filled with the crushed stone 22, the drainage pipe 24 is embedded in the wall structure 16, and the drainage pipe 26 is embedded in the anchor fixing member 12. By burying, the ground can be drained from the ground to the inside of the wall structure 16. However, when it is not necessary to drain the ground, these configurations are unnecessary, and concrete may be placed so that the wall structure 16 is in close contact with the pile pile 10.

6-15 is a figure which shows the construction process of the wall structure shown in the said FIGS. 1-5. As shown in FIG. 6, first, the pile pile 10 is driven and rooted to a predetermined depth (bottom position of the uppermost permanent anchor 14a). Then, a crushed stone holding plate 28 is attached to the side surface of the mountain retaining pile 10 using, for example, an angle material, and further, a corrugated steel plate 30 that is a crushed stone stop extending upward from the tip of the crushed stone retaining plate 28 is attached. The crushed stone 22 is filled in the space between 30 and the ground side of the ground. For example, the crushed stone holding plate 28 is configured in a mesh shape, so that the water of the crushed stone 22 in each stage can pass through the drain pipe 26 of the anchor fixing member 12 directly below to the crushed stone 22 in the lower stage. It has become. It should be noted that a hole is formed in the corrugated steel pipe 30 at a position facing the end of the drain pipe 24 provided in the wall structure 16, and the water in the crushed stone 22 passes through the hole to drain the water 24. To be able to flow out.

  Next, as shown in FIG. 7, the discarded concrete 31 is placed at the construction position of the anchor fixing member 12 on the bottom surface of the root cutting portion, and the stud 32 as a protruding member is welded to the flange surface of the retaining pile 10. Further, a formwork for placing the anchor fixing member 12 is disposed, and the guide pipe 34 for constructing the permanent anchor 14 and the drain pipe 26 are installed. Then, the reinforcing bars 35 are arranged around the guide tube 34 and the reinforcing bars of the anchor fixing member 12 are arranged, and concrete is placed in the mold. At this time, the reinforcing bars of the anchor fixing member 12 are protruded from the upper surface, and further, the reinforcing bars are disposed from the lower surface so as to pass through the concrete 31 and be embedded in the ground. In this way, the ends of the reinforcing bars projecting up and down from the anchor fixing member 12 are preferably threaded reinforcing bars so that they can be easily joined to the reinforcing bars of the wall structure 16 described later.

  Next, as shown in FIG. 8, the permanent anchor 14 is driven. The permanent anchor 14 is formed by drilling in an oblique direction from the inside of the guide tube 34 until reaching the support plate, inserting the anchor steel material 36 inserted through the sheath tube to the bottom of the hole, and injecting the grout material. Thus, it can be performed by a known method of fixing the anchor steel material 36 to the ground. Then, after curing the grout material, as shown in FIG. 9, the anchor steel material 36 is tensioned and fixed to the anchor fixing member 12 by the fixing metal fitting 38.

  In the above description, the permanent anchor 14 is driven after the anchor fixing member 12 is constructed. However, after the permanent anchor 14 is driven, the anchor fixing member 12 is constructed, and the permanent anchor 14 is fixed thereto. It may be fixed.

  Next, as shown in FIG. 10, root cutting is performed to the depth of the permanent anchor 14b of the next stage, and construction is performed by the same processes as in FIGS. Such a process is repeated up to the lowermost permanent anchor 14c (FIG. 11).

  After construction up to the lowermost permanent anchor 14c, the root cutting is continued to the placement depth of the floor 18 and after the root cutting is completed, the wall structure 16 and the floor 18 are arranged. At this time, the reinforcing members of the wall structure 16 and the anchor fixing member 12 are joined by, for example, screwing the reinforcing bars of the wall structure 16 to the reinforcing bars protruding from above and below the anchor fixing member 12 as described above. The unity is ensured.

After bar arrangement of the wall structure 16 and the floor 18, as shown in FIG. 12, the concrete of the floor 18 is cast, and further the concrete of the wall structure 16 is cast to the height of the anchor fixing member 12 at the lowest level. . At that time, a drain pipe 24 is installed in the mold in advance. Concrete after casting to measure the tension of the anchor steel 36 of the lowermost permanent anchor 14 c, again tensioning the anchor steel 36 if necessary. Then, the concrete of the wall structure 16 is placed in the same manner as described above up to the upper anchor fixing member 12, and the anchor steel material 36 of the permanent anchor 14b to be fixed and fixed to the anchor fixing member 12 is tensioned as necessary. To do. By repeating the placement work of the wall structure 16 up to the anchor fixing member 12 at the uppermost stage (see FIGS. 13 to 14), the concrete 16a at the uppermost part of the wall is further placed (see FIG. 15). ), The construction of the wall structure shown in FIG. 1 is completed.

  As described above, according to the present embodiment, the permanent anchor 14 is fixedly fixed to the anchor fixing member 12 constructed on the pile pile 10, so that the earth pressure of the ground is surely borne by the permanent anchor 14 at the time of root cutting. Can do. Further, while constructing the permanent anchor 14, by placing the concrete of the wall structure 16 so as to be integrated with the anchor fixing member 12 to which the permanent anchor 14 is fixed and fixed, a temporary anchor or a temporary belly is used. Wall structure 16 can be constructed without. Furthermore, since the anchor fixing member 12 functions also as the erection of the piled pile 10, it is not necessary to use a temporary erection. Since the anchor fixing member 12 is integrated as a part of the wall structure 16, there is no need to remove the temporary anchor or the erection as in the case where the temporary anchor is used. Reduction can be achieved.

  Moreover, since the construction of temporary anchors is not required, the total number of anchors is reduced, and in this respect, the construction period can be shortened and the cost can be reduced. Furthermore, since the number of anchors is reduced, it becomes easy to perform effective anchor arrangement planning, so that the quality of the constructed wall structure 16 can be improved.

  Further, in the present embodiment, the anchor fixing member 12 is made of reinforced concrete, and the reinforced concrete is joined to the reinforcing bar of the wall structure 16, thereby ensuring strong integrity between the anchor fixing member 12 and the wall structure 16. it can. For this reason, the anchor fixing member 12 can be regarded as a part of the wall structure 16 in design, and the same high strength as when the wall structure 16 is constructed of integral concrete can be obtained.

  Furthermore, in this embodiment, while installing the crushed stone 22 between the retaining pile 10 and the wall structure 16, and providing the drainage pipes 24 and 26 in the anchor fixing member 12 and the wall structure 16, the water is drained from the ground. It can be performed. That is, the water in the ground passes through the crushed stone 22 and is discharged from the drain pipe 24 of the wall structure 16 to the inside of the wall, and the water of the crushed stone 22 at each stage divided vertically by the anchor fixing member 12 is Since it can move to the crushed stone 22 in the lower stage through the drain pipe 26 of the anchor fixing member 12, the drainage by the crushed stone 22 is performed more effectively. Therefore, according to this embodiment, the water pressure applied to the outer wall surface of the wall structure 16 can be relaxed.

  In addition, in the said embodiment, it was set as the structure which uses the mountain retaining pile 10 which consists of H-shaped steel as a mountain retaining, and made the anchor fixing member 12 constructed | assembled to this mountain retaining pile 10 function also as a belly, However, The mountain retaining in this invention is not restricted to this. For example, it can also be used for a mountain fastening method such as a steel pipe sheet pile wall, a pillar row retaining wall, a continuous underground wall, or the like.

  Moreover, in the said embodiment, the wall structure 16 shall be reinforced concrete structure, the anchor fixing member 12 was also constructed | assembled by reinforced concrete corresponding to this, and the integrity was improved by joining both reinforcing bars. However, the present invention is not limited to this. For example, when the wall structure 16 is made of steel concrete, the anchor fixing member 12 is also made of steel concrete. When the wall structure 16 is steel reinforced concrete, the anchor fixing member 12 is also steel frame. By constituting the reinforced concrete, the anchor fixing member 12 and the wall structure 16 can be integrated.

Next, a second embodiment of the present invention will be described. FIG. 16 is a cross-sectional view showing a reinforced concrete wall structure constructed in the present embodiment. In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.
As shown in FIG. 16, in this embodiment, an anchor fixing member 100 made of a steel member is provided in place of the anchor fixing member 12 of the first embodiment. FIG. 17 is an enlarged cross-sectional view showing the anchor fixing member 100 and its peripheral portion according to the present embodiment, and FIG. 18 is a front view seen from the left side in FIG.

  As shown in FIGS. 17 and 18, the anchor fixing member 100 is roughly composed of a reinforcing rib member 102, an oblique support member 104, a bellows member 106, and the like. The reinforcing rib member 102 is a steel material such as H-shaped steel, for example, and is welded to the pile pile 10 so that the upper and lower flanges 102 a and 102 b and the web 102 c are perpendicular to the pile pile 10. A reinforcing member 103 is welded to the lower surface of the lower flange 102b of the reinforcing rib member 102.

An oblique support member 104 is provided on the upper side of the upper flange 102 a of the reinforcing rib member 102. The diagonal support member 104 is made of a steel material such as H-shaped steel whose lower end surface 104a is cut obliquely, and this end surface 104a is welded to the upper surface of the upper flange 102a of the reinforcing rib member 102. In addition, a reinforcing material 105 extending in the horizontal direction is welded to the flange 104 c on the oblique lower side of the oblique support member 104. The reinforcing material 105 is made of, for example, a steel material having a C-shaped cross section.

A holding plate 107 is welded to the upper end surface 104 c of the diagonal support member 104, and the erection material 106 is held by the holding plate 107. The bellows member 106 is composed of, for example, two steel frames 106a formed by stacking H-shaped steel in two vertical stages and bolted together, and extends horizontally across a plurality of piles 10. Yes. These steel frames 106a are connected to each other by connection plates 108 provided at predetermined intervals in the horizontal direction. And the permanent anchor 14 is being fixed to the intermediate part of the pile pile 10 which adjoins the belly raising material 106. FIG. As will be described later, in this embodiment, the permanent anchor 14 is fixed to the upper flange 106a of the bellows member 106 before placing the concrete, and is re-tensioned after the concrete is placed, and the lower flange 106b of the belly member 106 is re-tensioned. In FIG. 17, the fixing position before placing concrete is indicated by a solid line, and the fixing position after placing concrete is indicated by a broken line.

  19-23 is a figure which shows the construction process of the wall structure in this embodiment. First, as shown in FIG. 19, after the pile retaining pile 10 is driven and rooted to the position of the uppermost permanent anchor 14, the reinforcing rib member 102 is welded to the retaining pile 10, and the reinforcing rib member is further provided. The anchor fixing member 100 is constructed by welding the diagonal support member 104 to 102 and attaching the belly raising member 106 or the like. Next, after the permanent anchor 14 is driven in an oblique direction, the anchor steel material 36 is tensioned and fixedly fixed to the upper flange 106 a of the stomach member 106 by the pedestal 110. Moreover, the corrugated steel sheet 30 is installed, and the crushed stone 22 is filled in the space between the corrugated steel sheet 30 on the upper side of the reinforcing rib member 102 and the ground side surface.

  Next, as shown in FIG. 20, rooting is performed to the depth of the permanent anchor 14b in the next stage, and the anchor fixing member 100 is constructed and the permanent anchor 14 is constructed in the same manner as in FIG. Such a process is repeated up to the lowermost permanent anchor 14c (FIG. 21).

After construction to the lowermost permanent anchor 14c, the root cutting is continued to the placement depth of the floor 18 and after the root cutting is completed, the reinforcing bars of the wall structure 16 and the floor 18 are arranged, and FIG. As shown, the concrete of the wall structure 16 is driven up to the height of the anchor fixing member 100 at the lowest level (the height at which the belly raising member 106 is exposed from the concrete). It should be noted that the reinforcing bars of the wall structure 16 are arranged up to a position above the concrete placement height by a length that allows lap joints to be reinforced with the concrete reinforcing bars on the upper level. After placing the concrete, the tension of the anchor steel material 36 of the lowermost permanent anchor 14 c is once released and then re-tensioned to be fixed to the lower flange 106 b of the erection material 106 by the pedestal 112. As described above, once the tension of the anchor steel material 36 is released, the concrete of the wall structure 16 that has been placed bears a part of the earth pressure of the ground. As a result, the integrity of the wall structure 16 and the anchor fixing member 100 is strengthened, and earth pressure is received in the wall structure 16 and the anchor fixing member 100 in substantially the same manner, so that the wall structure 16 can be easily designed. . In the above description, when the permanent anchor 14 is in the second tension (at the time of permanent installation), the fixing position is lowered to the lower flange 106b of the material 106 from the first tension (at the time of temporary installation), thereby temporarily setting the permanent anchor 14. In some cases, the dent generated at the fixing position of the anchor steel material 36 does not remain in the anchor steel material 36 after the main installation. However, since such a dent does not affect the strength of the anchor steel material 36, the permanent anchor 14 may be fixed at the same position during temporary installation and during permanent installation.

  Next, as shown in FIG. 23, the concrete of the wall structure 16 is placed up to the anchor fixing member 100 on the upper level, and the anchor fixing member 100 on the lower level after the permanent anchor 14 has been re-tensioned is buried in the concrete. kill. Then, in the same manner as described above, after the tension of the anchor steel material 36 is once released, it is re-tensioned and fixed. The operation of placing the wall structure 16 and the re-tensioning of the permanent anchor is repeated up to the anchor fixing member 12 at the uppermost stage, and further, the concrete at the uppermost part of the wall is placed, so that the wall structure shown in FIG. Construction is complete.

  As described above, in this embodiment, the anchor fixing member 100 is made of a steel material, and the steel material is buried in the concrete of the wall structure 16 so that the anchor fixing member 100 and the concrete of the wall structure 16 are integrated. I am doing so. For this reason, since the operation | work for joining the reinforcing bar of the anchor fixing member 12 and the reinforcing bar of the wall structure 16 like the said 1st Embodiment becomes unnecessary, a man-hour can be reduced by that much. In addition, after placing the concrete of the wall structure 16, the tension between the anchor anchor member 100 and the wall structure 16 may be further strengthened by releasing the tension of the permanent anchor 14 and re-tensioning. it can.

  In the above description, the concrete of the wall structure 16 is placed up to the height of the anchor fixing member 100 at each stage, and then the tension of the permanent anchor 14 is released and re-tensioned. After releasing the tension of the permanent anchor 14 first, the concrete of the wall structure 16 may be placed and re-tensioned after placing the concrete.

  Further, the construction method for re-tensioning the permanent anchor 14 as in the present embodiment can be applied to the case of the first embodiment. That is, also in the first embodiment, the tension of the permanent anchor 14 fixed to the anchor fixing member 12 in a state where the concrete of the wall structure 16 is cast integrally with the anchor fixing member 12 (for example, the state shown in FIG. 12). Once you release it, re-tension it. In this way, when the tension is released, earth pressure is borne by the concrete of the wall structure 16 together with the anchor fixing member 12, and then the permanent anchor 14 is re-tensioned, The integrity with the anchor fixing member 12 can be further strengthened.

It is sectional drawing which shows the wall structure of the reinforced concrete structure constructed | assembled by the construction of the wall structure which is one Embodiment of this invention. It is the side view which looked at the wall structure of FIG. 1 from the left side in the figure. It is an enlarged side view which shows the permanent anchor construction part in FIG. It is IV-IV sectional drawing of FIG. It is VV sectional drawing of FIG. It is a figure (the 1) which shows the construction process of the wall structure in this embodiment. It is a figure (the 2) which shows the construction process of the wall structure in this embodiment. It is a figure (the 3) which shows the construction process of the wall structure in this embodiment. It is FIG. (The 4) which shows the construction process of the wall structure in this embodiment. It is FIG. (5) which shows the construction process of the wall structure in this embodiment. It is FIG. (6) which shows the construction process of the wall structure in this embodiment. It is a figure (the 7) which shows the construction process of the wall structure in this embodiment. It is FIG. (The 8) which shows the construction process of the wall structure in this embodiment. It is FIG. (9) which shows the construction process of the wall structure in this embodiment. It is FIG. (10) which shows the construction process of the wall structure in this embodiment. It is sectional drawing which shows the wall structure of the reinforced concrete structure constructed | assembled in the 2nd Embodiment of this invention. It is sectional drawing which expands and shows the anchor fixing member of this embodiment, and its peripheral part. It is the front view seen from the left side in FIG. It is a figure (the 1) which shows the construction process of the wall structure in this embodiment. It is a figure (the 2) which shows the construction process of the wall structure in this embodiment. It is a figure (the 3) which shows the construction process of the wall structure in this embodiment. It is FIG. (The 4) which shows the construction process of the wall structure in this embodiment. It is FIG. (5) which shows the construction process of the wall structure in this embodiment. It is sectional drawing which shows the structure which constructed | assembled the wall structure using the permanent anchor, after performing the mountain retention using the temporary anchor. It is the front view seen from the left side of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Mountain retaining pile 12 Anchor fixing member 14 (14a, 14b, 14c) Permanent anchor 16 Wall structure 22 Crushed stone 24, 26 Drain pipe 28 Crushed stone holding plate 32 Stud 100 Anchor fixing member 102 Reinforcement rib material 104 Diagonal support material 106 Belly raising material

FIG. 24 is a cross-sectional view showing a configuration in which a wall structure is constructed using a permanent anchor after mountain mounting using a temporary anchor, and FIG. 25 is a front view seen from the left side of FIG. The construction procedure of the wall structure will be described with reference to these drawings. First, the pile retaining pile 50 is placed, and the ground inside the pile retaining pile 50 (left side in FIG. 24 ) is rooted. When the root cutting depth reaches the uppermost temporary anchor construction position, a steel erection 52 is attached to the pile pile 50, and a pedestal 54 for fixing the temporary anchor is fixed to the erection 52. Then, the uppermost temporary anchor 56 a is constructed and fixed to the base 54. Thereafter, such root cutting and construction of the temporary anchor 56 are repeated up to the lowermost temporary anchor 56c.

When the construction of the temporary anchor 56 is finished, flooring is performed. Then, the floor concrete 58 is placed, and the temporary anchor 56 is sequentially removed from the bottom while placing the wall structure 60 upward from the floor concrete 58. That is, in the example of FIGS. 24 and 25 , the bottom temporary anchor 56c, the erection 52, and the pedestal 54 are removed, then the floor concrete 58 is placed, and the next temporary anchor 56b and the like are removed before the wall. After the lowermost portion of the structure 60 is driven and the uppermost temporary anchor 56a and the like are removed, the remaining portion of the wall structure 60 is driven. In addition, while the wall structure 60 is driven, the oblique permanent anchor 62 is also constructed. Thus, the construction of the wall structure 60 is completed.

  As described above, in the construction shown in FIGS. 24 and 25, the construction and removal of the temporary anchor 56 and the like are required, which increases the construction cost and lengthens the construction. Furthermore, since the space between the mountain retaining pile 50 and the wall structure 60 is narrow, temporary removal work is extremely difficult. In addition, the removal work of the temporary anchor 56 or the like or the outer wall formwork work must be performed in parallel with the construction of the wall structure 60 and the permanent anchor 62, so the work is congested and work efficiency is deteriorated.

To achieve the above object, the invention described in claim 1, and Da設the earth retaining, the inner ground of該山fastened to Excavation, anchor fixing member for fixing securing the anchor to the earth retaining In addition to the construction, a permanent anchor was constructed in which an oblique anchor was placed, the anchor was fixedly fixed to the anchor fixing member, and then the wall structure concrete was integrated with the anchor fixing member . A method for building a wall structure,
The anchor fixing member is constructed in a plurality of stages, and a tensioned anchor is fixed on each stage of the anchor fixing member.
A first step of placing concrete of the wall structure from the lowest level of the anchor fixing member to the uppermost level to a position lower than the anchor fixing position of the anchor fixing member; After the second step of re-tensioning the anchor fixed to the fixing member, the uppermost concrete of the wall structure is placed .

According to a second aspect of the present invention, in the method of the first aspect, the tension of the anchor is increased after the first step and before the second step for each step of the anchor fixing member. A loosening step is performed, and the anchor is re-tensioned in the second step .

Moreover, the invention described in claim 3 is a wall structure constructed by the construction method according to claim 1 or 2 and provided with a permanent anchor .

After bar arrangement of the wall structure 16 and the floor 18, as shown in FIG. 12, the concrete of the floor 18 is cast, and further the concrete of the wall structure 16 is cast to the height of the anchor fixing member 12 at the lowest level. . At that time, a drain pipe 24 is installed in the mold in advance. Concrete after casting, tensioned anchor steel 3 6 of the lowermost permanent anchor 14 c again. Then, the concrete of the wall structure 16 is placed in the same manner as described above to the upper anchor fixing member 12, and the anchor steel material 36 of the permanent anchor 14b to be fixed and fixed to the anchor fixing member 12 is re- tensioned. By repeating the placement work of the wall structure 16 up to the anchor fixing member 12 at the uppermost stage (see FIGS. 13 to 14), the concrete 16a at the uppermost part of the wall is further placed (see FIG. 15). ), The construction of the wall structure shown in FIG. 1 is completed.

Furthermore, in this embodiment, while installing the crushed stone 22 between the retaining pile 10 and the wall structure 16, and providing the drainage pipes 24 and 26 in the anchor fixing member 12 and the wall structure 16, the water is drained from the ground. It can be performed. That is, the water in the ground passes through the crushed stone 22 and is discharged from the drain pipe 24 of the wall structure 16 to the inside of the wall, and the water of the crushed stone 22 at each stage divided vertically by the anchor fixing member 12 is Since it can move to the crushed stone 22 of the lower stage through the drain pipe 26 of the anchor fixing member 12, the drainage by the crushed stone 22 is performed more effectively. Therefore, according to this embodiment, the water pressure applied to the outer wall surface of the wall structure 16 can be relaxed.

Claims (13)

An anchor fixing member for anchoring and fixing the anchor is constructed in the mountain retaining by setting up the anchor, rooting the ground inside the anchor, and forming an oblique anchor, and fixing the anchor to the anchor A method for constructing a wall structure on which a permanent anchor is constructed, characterized in that after fixing and fixing to a fixing member, concrete having a wall structure is placed so as to be integrated with the anchor fixing member. The anchors are provided in a plurality of stages. For each stage from the upper stage side to the lower stage side, ground anchorage, construction of the anchor fixing member, and placement and fixing of the anchor are performed, and anchors in all stages are provided. The method according to claim 1, wherein the concrete of the wall structure is placed after the construction of is completed. 3. The method according to claim 1, wherein the wall structure is reinforced concrete or steel reinforced concrete, and the anchor fixing member is constructed of reinforced concrete. 4. The method according to claim 3, wherein the reinforcing bar of the anchor fixing member and the reinforcing bar of the wall structure are joined before placing the concrete of the wall structure. The method according to claim 1, wherein the wall structure is made of steel concrete, and the anchor fixing member is constructed of steel concrete. 3. The method according to claim 1, wherein the wall structure is a steel reinforced concrete structure, and the anchor fixing member is constructed of steel reinforced concrete. A projecting member projecting inward of the root cutting portion is provided at a site where the anchor fixing member of the mountain fastening is constructed, and the concrete of the anchor fixing member is embedded in the anchor fixing member. The method according to claim 3 or 4, characterized in that it is cast. Installing crushed stone in a space between the outer peripheral surface of the wall structure and the inner side surface of the ground, and providing a drainage pipe penetrating between the inner side surface and the outer side surface of the wall structure; 8. A method according to any one of the preceding claims. A holding plate having water permeability is attached to the upper position of the construction site of the anchor fixing member to the mountain stopper, and the crushed stone is installed on the holding plate, and the anchor fixing member has a drain pipe penetrating therethrough. 9. The method of claim 8, wherein: 3. The method according to claim 1, wherein the anchor fixing member is made of a steel material. After fixing the anchor to the anchor fixing member, releasing the tension;
The method according to any one of claims 1 to 10, comprising the step of re-tensioning after placing the concrete of the wall structure. An anchor fixing member for fixing and fixing an anchor is constructed on a mountain anchor placed on the ground. The anchor is fixed and fixed to the anchor fixing member, and the wall structure concrete is integrated with the anchor fixing member. A wall structure in which a permanent anchor is constructed. The wall structure according to claim 12, wherein the anchor fixing member is made of a concrete member or a steel material.

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