JP7370642B1 - Construction method of waist wall - Google Patents

Abstract

[Problem] To provide a waist wall using precast concrete that does not require fixing to a building support and is easy to construct, and a method for constructing the same.
[Solution] A waist wall 1 includes a waist wall main body 2 made of precast concrete, which has an anchor fixing part for fixing a waist wall fixing anchor 11 to be integrated with a dirt floor concrete 12 on the inner surface of the lower part, and a foundation concrete 10, a waist wall fixing plate fixed to the bottom of the waist wall main body 2, and a level adjustment section provided on the foundation fixing plate for adjusting the height of the waist wall fixing plate. and a waist wall mounting tool 3 consisting of.
[Selection diagram] Figure 1

Description

The present invention relates to a waist wall using precast concrete (hereinafter referred to as "PC") and a method for constructing the same.

There are various methods for constructing waist walls in steel-framed buildings. For example, when a steel frame building is used as a factory, warehouse, etc., it is common to arrange reinforcing bars and build up concrete blocks using mortar. There are also methods of pouring concrete on-site and methods of constructing waist walls using precast members (see Patent Document 1).

For example, in Patent Document 2, in a method of installing a PC waist wall between a plurality of pillars, a fitting groove is formed along the arrangement direction of the pillars on the upper surface of the foundation outside the pillars. Fit the fitting protrusion at the lower end of the wall into the fitting groove and set it upright. Then, temporarily secure the upper part of the waist wall to the support with bolts, adjust the position from the indoor side using a crowbar, and then A method is described for attaching a waist wall by permanently joining the upper part of the wall to a post using bolts.

JP2009-299378A (Paragraph 0015) Japanese Patent Application Publication No. 2008-240243

According to the method described in Patent Document 2, it is possible to improve work efficiency compared to the conventional general method of arranging reinforcing bars and piling up concrete blocks with mortar. However, in the method described in Patent Document 2, it is necessary to form each PC waist wall so that its width matches the spacing between each of the plurality of pillars. In addition, when connected to a building support, the vibrations of the building are transmitted to the waist wall, which can lead to cracks.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a waist wall using PC that does not require fixing to a support of a building and is easy to construct, and a method for constructing the same.

The waist wall of the present invention includes a PC waist wall main body having an anchor fixing part for fixing a waist wall fixing anchor to be integrated with the dirt floor concrete on the inner surface of the lower part, and a base fixed on the foundation concrete. A waist wall installation consisting of a fixing plate, a waist wall fixing plate fixed to the bottom of the waist wall main body, and a level adjustment section provided on the foundation fixing plate for adjusting the height of the waist wall fixing plate. It has a tool.

The construction method for this waist wall is to fix the waist wall mounting tools on the foundation concrete using the foundation fixing plate, adjust the height of the waist wall fixing plate using the level adjustment part, and attach the waist wall main body on the waist wall fixing plate. fixing the waist wall fixing anchor to the anchor fixing part of the waist wall main body; attaching a formwork to the upper surface of the foundation concrete at the lower part of the outer surface of the waist wall main body; The present invention is characterized in that by pouring concrete including the space formed between them and the lower inner surface of the waist wall main body, an earthen floor concrete integrated with the waist wall fixing anchors is formed.

According to the waist wall of the present invention, the waist wall main body is fixed on the foundation concrete using the waist wall mounting tool, and the waist wall fixing anchor is fixed to the anchor fixing portion on the lower inner surface of the waist wall main body. It is integrated with the concrete floor and stands on its own. Further, the level of the waist wall body can be easily adjusted by adjusting the height of the waist wall fixing plate using the level adjustment part of the waist wall mounting tool fixed on the foundation concrete by the foundation fixing plate.

The waist wall of the present invention may further include a top adjustment tool fixed to the upper surface of the waist wall main body and for adjusting the height of the waist wall top surface. The construction method for this waist wall is to fix the waist wall mounting tools on the foundation concrete using the foundation fixing plate, adjust the height of the waist wall fixing plate using the level adjustment part, and attach the waist wall main body on the waist wall fixing plate. Adjust the height of the top surface of the waist wall using a top adjustment tool; Pack mortar between the top surface of the waist wall body and the top surface of the waist wall; Place anchors for fixing the waist wall on the waist wall body. Fixing to the anchor fixing part, attaching formwork to the upper surface of the foundation concrete at the lower part of the outside surface of the waist wall body, the space formed between the foundation concrete and the waist wall body, and the lower inside surface of the waist wall body. By pouring concrete including the anchors, a concrete floor is formed that is integrated with the anchors for anchoring the waist wall.

According to the waist wall of the present invention, it is further possible to easily adjust the height of the waist wall top surface using the top adjustment tool.

According to the waist wall of the present invention, the waist wall main body is fixed on the foundation concrete using the waist wall mounting tool, and the waist wall fixing anchor is fixed to the anchor fixing portion on the lower inner surface of the waist wall main body. Since it is integrated with the concrete floor and stands on its own, construction is easy and it is possible to form a waist wall in a short period of time. Furthermore, since it is not necessary to fix it to the pillars of the building, cracks will not occur.

It is a sectional view of the waist wall of the steel frame building in an embodiment of the present invention. FIG. 2 is a rear view of the waist wall in FIG. 1; FIG. 2 is an enlarged view of part III in FIG. 1; 2 is an enlarged view of section IV in FIG. 1. FIG. FIG. 2 is a rear reinforcement diagram of the waist wall main body in FIG. 1; FIG. 2 is a plan view of the reinforcement of the waist wall main body in FIG. 1; FIG. 2 is a bottom view of the waist wall main body in FIG. 1; FIG. 2 is a right side reinforcement diagram of the waist wall main body in FIG. 1; 3 is an enlarged view of section IX in FIG. 2. FIG. 10 is a plan view of the waist wall fixing plate of FIG. 9. FIG. 10 is a plan view of the foundation fixing plate of FIG. 9. FIG. It is a figure which shows another embodiment of the waist wall of this invention, Comprising: (A) is a top view, (B) is a front view. FIG. 13 is a plan view showing a state in which the waist wall main bodies of FIG. 12 are joined.

1 is a cross-sectional view of a waist wall of a steel frame building according to an embodiment of the present invention, FIG. 2 is a rear view of the waist wall in FIG. 1, FIG. 3 is an enlarged view of section III in FIG. 1, and FIG. 4 is a section IV in FIG. Enlarged view, FIG. 5 is a rear reinforcement arrangement diagram of the waist wall main body in FIG. 1, FIG. 6 is a plan view of the reinforcement arrangement of the waist wall main body in FIG. 1, FIG. 7 is a bottom view of the waist wall main body in FIG. 1, and FIG. Figure 9 is an enlarged view of section IX in Figure 2, Figure 10 is a plan view of the waist wall fixing plate in Figure 9, and Figure 11 is a plan view of the foundation fixing plate in Figure 9. be.

As shown in FIGS. 1 and 2, a waist wall 1 of a steel frame building according to an embodiment of the present invention includes a waist wall main body 2 made of PC, and a waist wall mounting tool for fixing the waist wall main body 2 onto a foundation concrete 10. 3.3A. As shown in FIG. 4, the top surface 2A of the waist wall main body 2 is provided with a top adjustment tool 4 for adjusting the height of the waist wall top surface 1A. An angle member 6 serving as a drain support portion for fixing the drainer 5 is welded onto the top adjustment tool 4. Further, an indoor decorative cover 7 is fixed on the top adjustment tool 4.

The waist wall body 2 is a PC panel manufactured at a factory. As shown in FIG. 5, welded wire mesh 20 is reinforced within the waist wall main body 2. As shown in FIG. 8, the lower inner surface of the waist wall main body 2 is provided with an anchor fixing part 21 for fixing the waist wall anchor 11. The anchor fixing portion 21 is configured by embedding an insert nut, for example, a commercially available O insert (manufactured by Japan Life Co., Ltd.). The insert nut (O-insert) of the anchor fixing portion 21 is made of a deformed reinforcing bar that is internally threaded, and has a horizontal hole at the end for passing the insertion bar. By passing the deformed reinforcing bars 21A as reinforcing bars through this horizontal hole, the pull-out strength is increased and the load is evenly applied to the inside of the waist wall body 2.

The waist wall fixing anchor 11 is for integrating with the earthen floor concrete 12. An external thread 11A is formed at one end of the waist wall fixing anchor 11, and is screwed into an internal thread of the anchor fixing part 21 (O insert). Further, by tightening the fixing nut 11B, the waist wall fixing anchor 11 is fixed to the waist wall main body 2. The other end of the waist wall fixing anchor 11 is folded back into a J-shape so that the pull-out strength increases when the anchor 11 is integrated with the concrete floor 12.

The upper part of the waist wall main body 2 is provided with a top adjustment tool fixing part 22 for fixing the top adjustment tool 4, as shown in FIGS. 5 and 8. The top adjustment tool fixing part 22 is configured by embedding an insert nut, for example, a commercially available Y insert (manufactured by Japan Life Co., Ltd.). The insert nut (Y insert) of the top adjustment tool fixing part 22 is made of a deformed reinforcing bar that is internally threaded, and has a Y-shaped hook at the end to increase adhesion to concrete.

In addition, the top adjustment tool fixing part 22 is arranged so that the welded wire mesh 20 is placed at the center of the waist wall main body 2 in the direction of thickness T (see FIG. 6) to ensure the concrete cover thickness. It is offset and placed in a position that avoids. The center position of this top adjustment tool fixing part 22 in the thickness T direction of the waist wall main body 2 is the center of the waist wall main body 2. In addition, when installing the waist wall main body 2, an eye bolt (not shown) is attached to the top adjustment tool fixing part 22 instead of the top adjustment tool 4, and a small crane etc. is attached using a shackle and wire. It is possible to hang it.

As shown in FIGS. 3 and 9 to 11, the waist wall mounting tool 3 includes a foundation fixing plate 30 fixed on the foundation concrete 10, and a waist wall fixing plate 31 fixed on the bottom surface of the waist wall body 2. , and a level adjustment section 32 provided on the foundation fixing plate 30 and for adjusting the height of the waist wall fixing plate 31.

The waist wall fixing plate 31 is made of, for example, an iron plate. As shown in FIG. 10, the waist wall fixing plate 31 is provided with an attachment hole 31A for attaching to the waist wall main body 2 and an attachment hole 31B for attaching the level adjustment part 32. As shown in FIGS. 5 and 9, a recess 2C having a depth corresponding to the thickness of the waist wall fixing plate 31 is formed at the mounting position of the waist wall fixing plate 31 on the bottom surface 2B of the waist wall main body 2. .

An insert nut 23, such as a P insert (manufactured by Japan Life Co., Ltd.), is buried in the recess 2C at a position corresponding to the mounting hole 31A of the waist wall fixing plate 31. The insert nut 23 (P insert) is made of round steel and has one end processed with a hook to ensure anchoring strength to concrete. The waist wall mounting tool 3 is fixed to the waist wall main body 2 by screwing a bolt (not shown) into the insert nut 23 from below through the mounting hole 31A of the waist wall fixing plate 31. Furthermore, deformed reinforcing bars 24 are buried in the waist wall body 2 upward from the bottom surface of the recess 2C so as to abut against the waist wall fixing plate 31 fixed to the recess 2C.

The foundation fixing plate 30 is made of, for example, an iron plate. As shown in FIG. 11, the foundation fixing plate 30 is provided with an attachment hole 30A for attachment to the foundation concrete 10 and a tall nut 32A that constitutes the level adjustment section 32. The tall nut 32A is welded to the foundation fixing plate 30. The waist wall attachment tool 3 is fixed to the foundation concrete 10 by screwing a nut 34 onto an anchor bolt 33 provided in the foundation concrete 10 through the attachment hole 30A of the foundation fixing plate 30. As the anchor bolt 33, an adhesive anchor such as a chemical anchor (registered trademark) can be used, for example.

As shown in FIGS. 3 and 9, the level adjustment section 32 includes the above-mentioned high nut 32A and bolts 32B and 32C that are screwed into the high nut. The level adjustment unit 32 adjusts the height of the waist wall fixing plate 31 by changing the screwing amount of the bolt 32B into the high nut 32A, and adjusts the height of the waist wall fixing plate 31 by tightening the bolt 32C against the high nut 32A. can be fixed. A space 26 for tightening the bolt 32C is provided at the lower corner of the waist wall main body 2. After adjusting the height, the bolt 32B is welded and fixed to the high nut 32A.

The waist wall fixing tool 3A (see FIG. 2) fixed to the recess 2D at the lower center of the waist wall main body 2 in the width L direction has the same structure as the waist wall fixing tool 3, but for tightening the bolt 32C. Since there is no space, the portion tightened by the bolt 32C is omitted.

The top adjustment tool 4 includes a top plate 40, a bolt 41 welded to the lower surface of the top plate 40, and a fixing nut 42. The top plate 40 is a circular plate made of, for example, an iron plate. The upper surface 40A of the top plate 40 becomes the waist wall top end surface 1A of the waist wall main body 2. The top adjustment tool 4 is fixed to the upper surface of the waist wall main body 2 by rotating the top plate 40 and threading the bolt 41 into the insert nut of the top adjustment tool fixing part 22. The top adjustment tool 4 adjusts the height of the waist wall top surface 1A by changing the screwing amount of the bolt 41 into the insert nut of the top adjustment tool fixing part 22, and tightens the fixing nut 42 to adjust the height of the waist wall top surface 1A. The height of 1A can be fixed.

The waist walls 1 are arranged side by side in the width L (see FIG. 5) direction. A recess 25 with a semicircular cross section extending in the height direction is formed at both ends of the waist wall main body 2 in the width L direction, and is formed by the recesses 25 of the adjacent waist wall main bodies 2 (see FIG. 6). The space having a substantially circular cross section is filled with mortar 9 (see FIG. 1).

In addition, in FIGS. 1 to 11, an example is explained in which the width L (see FIG. 5) of the waist wall body 2 is 1800 mm, but those with width L = 1200 mm, 900 mm, 600 mm, and 300 mm are prepared in advance. By keeping these in stock, it becomes possible to respond to a variety of steel buildings by combining them. At this time, the size and quantity of the waist wall mounting tool 3 to be attached to the waist wall main body 2 are changed as appropriate.

Next, regarding the construction method of the waist wall 1, [A] the case where the earthen floor concrete 12 is poured during or before the construction of the roof wall of the steel frame building, and [B] the case where the earthen floor concrete 12 is poured after the roof wall construction of the steel frame building is completed. This will be explained separately for the case of pouring.

[A] When pouring the dirt floor concrete 12 during or before construction of the roof wall of a steel frame building (1) Fix the waist wall mounting tool 3 on the foundation concrete 10 with the foundation fixing plate 30, and fix the waist wall with the level adjustment part 32. Adjust the height of the fixed plate 31.
(2) Attach an eye bolt to the top adjustment tool fixing part 22 of the waist wall main body 2, suspend it using a small crane or the like using a shackle and wire, install it on the waist wall mounting tool 3, and fix it.
(3) Adjust the height of the waist wall top surface 1A using the top adjustment tool 4, and weld the angle material 6.
(4) Attach the formwork 13 that reaches the upper surface of the foundation concrete 10 to the lower part of the outer surface of the waist wall body 2.
(5) After attaching the waist wall fixing anchor 11 to the anchor fixing part 21, fix it with the fixing nut 11B.
(6) Spread a waterproof sheet on the dirt floor, arrange reinforcement, pour concrete including the space formed between the foundation concrete 10 and the waist wall main body 2, and the lower inner surface of the waist wall main body 2, and A concrete floor 12 is formed which is integrated with an anchor 11 for anchoring the wall.
(7) Fix the drainer 5 on the angle member 6.
(8) Attach the outer wall panel 8.
(9) Mortar 9 (see FIGS. 1 and 4) is placed in the space of approximately circular cross section formed by the recesses 25 of the adjacent waist wall main bodies 2 and in the space below the angle material 6 and the top adjustment tool 4. pack.
(10) Fix the indoor decorative cover 7 on the top adjustment tool 4. Note that if the interior decoration cover 7 is not provided, a mortar decorative finish is performed by plastering.

[B] When pouring the dirt floor concrete 12 after completing the construction of the roof wall of a steel frame building (1) Fix the waist wall mounting tool 3 on the foundation concrete 10 with the foundation fixing plate 30, and fix the waist wall fixing plate with the level adjustment part 32. Adjust the height of 31.
(2) Attach an eye bolt to the top adjustment tool fixing part 22 of the waist wall main body 2, suspend it using a small crane or the like using a shackle and wire, install it on the waist wall mounting tool 3, and fix it.
(3) Adjust the height of the waist wall top surface 1A using the top adjustment tool 4, and weld the angle material 6.
(4) Fix the drainer 5 on the angle member 6.
(5) Attach the outer wall panel 8.
(6) Attach the formwork 13 to the upper surface of the foundation concrete 10 at the lower part of the outer surface of the waist wall body 2.
(7) Mortar 9 (see FIGS. 1 and 4) is placed in the space of approximately circular cross section formed by the recesses 25 of the adjacent waist wall main bodies 2 and in the space below the angle material 6 and the top adjustment tool 4. pack.
(8) Fix the indoor decorative cover 7 on the top adjustment tool 4. Note that if the interior decoration cover 7 is not provided, a mortar decorative finish is performed by plastering.
(9) After attaching the waist wall fixing anchor 11 to the anchor fixing part 21, fix it with the fixing nut 11B.
(10) Spread a waterproof sheet on the dirt floor, arrange reinforcement, pour concrete including the space formed between the foundation concrete 10 and the waist wall main body 2, and the lower inner surface of the waist wall main body 2, and A concrete floor 12 is formed which is integrated with an anchor 11 for anchoring the wall.

According to the waist wall 1 having the above configuration, the waist wall main body 2 is fixed onto the foundation concrete 10 using the waist wall mounting tool 3, and is also fixed to the anchor fixing portion 21 on the inner surface of the lower part of the waist wall main body 2. It is integrated with the dirt floor concrete 12 by the waist wall fixing anchors 11 and becomes independent. Therefore, since this waist wall 1 does not need to be fixed to the pillars of the building, there is no connection with the pillars and no cracks occur.

Since the waist wall main body 2 is manufactured in a factory, it is not affected by the construction period or rainfall, and the construction is easy and the waist wall can be formed in a short period of time. For example, it is possible to install the waist wall main body 2 over 80 m in one day. Moreover, since the waist wall main body 2 has no protrusions on the front and back surfaces, it is easy to transport.

Since the waist wall main body 2 is manufactured in a factory, the bar arrangement, covering, and casting accuracy are accurate and of high quality. Further, since the waist wall main body 2 can be manufactured by steam curing in a factory, it can be finished into a homogeneous product and has high quality. Furthermore, it can be manufactured in a factory using steel formwork, and the surface is finished smoothly, so there is no need for repair.

Further, the level of the waist wall main body 2 can be easily adjusted by adjusting the height of the waist wall fixing plate 31 using the level adjustment part 32 of the waist wall mounting tool 3 fixed on the foundation concrete 10 by the foundation fixing plate 30. It is possible to do this and construction is easy.

Further, the waist wall 1 can easily adjust the height of the waist wall top surface 1A using the top adjustment tool 4, and is easy to construct.

Next, another embodiment of the waist wall of the present invention will be described. FIG. 12 is a diagram showing another embodiment of the waist wall of the present invention, in which (A) is a plan view, (B) is a front view, and FIG. 13 is a plane showing a state in which the waist wall main bodies of FIG. 12 are joined. It is a diagram. In addition, in FIG. 12 and FIG. 13, the same reference numerals are attached to the components common to the above-mentioned waist wall main body 2, and detailed explanation thereof will be omitted.

In the above-mentioned waist wall 1, recesses 25 with a semicircular cross section extending in the height direction are formed at both ends of the waist wall main body 2 in the width L direction, and the recesses 25 are formed by the recesses 25 of the adjacent waist wall main bodies 2. Although the space having a substantially circular cross section is joined by filling mortar 9, the waist wall main body 50 shown in FIG. This is a configuration in which a convex portion 51 is provided in place of the concave portion 25. A recess 52 that fits into the projection 51 is provided at the other end of the waist wall main body 50.

In this embodiment, the convex portion 51 has a semicircular cross section when viewed from above, and the recess 52 has a semicircular cross section into which the convex portion 51 fits when viewed from above. Note that the convex portion 51 and the concave portion 52 may have a cross-sectional shape other than a semicircular cross-section as long as they fit into each other.

When employing the waist wall main bodies 50 having the above configuration, when the waist wall main bodies 50 are arranged side by side as shown in FIG. 13, the convex portions 51 and the recesses 52 of the adjacent waist wall main bodies 50 fit into each other. Therefore, there is no need to fill mortar 9 into the space having a substantially circular cross section formed by the recesses 25 of adjacent waist wall bodies 2, as in the above-mentioned waist wall bodies 2, and the construction period and cost can be reduced. In addition, when arranging the waist wall main bodies 50, by applying a sealant in the recess 25 in advance, the waist wall main bodies 50 can be brought into close contact with each other.

Further, in FIG. 13, the waist wall main body 53 disposed at the corner is formed in an L-shape in plan view, and the other configurations are the same as the waist wall main body 50. In this way, the waist wall main body 53 at the corner is also provided with a projection 51 at one end and a recess 52 at the other end so as to fit into the projection 51 and recess 52 of the waist wall main body 2. Similarly, just by arranging them side by side, the convex part 51 of the waist wall main body 50 and the recess 52 of the waist wall main body 53 fit together, and the recess 52 of the waist wall main body 50 and the convex part 51 of the waist wall main body 53 fit together.

INDUSTRIAL APPLICATION This invention is useful as a waist wall of a steel frame building, and its construction method.

1 Waist wall 1A Waist wall top surface 2, 50, 53 Waist wall body 2A Top surface 2B Bottom surface 2C Recess 3 Waist wall mounting tool 4 Top adjustment tool 5 Drainer 6 Angle material 7 Interior decorative cover 8 External wall panel 9 Mortar 10 Foundation concrete 11 Anchor for fixing waist wall 11A External screw 11B Fixing nut 12 Earthen floor concrete 13 Formwork 20 Welded wire mesh 21 Anchor fixing part 21A Deformed reinforcing bar 22 Top adjustment tool fixing part 23 Insert nut 24 Deformed reinforcing bar 25 Recess 26 Space 30 Foundation fixing plate 30A Installation Hole 31 Waist wall fixing plate 31A, 31B Mounting hole 32 Level adjustment part 32A High nut 32B, 32C Bolt 33 Anchor bolt 34 Nut 40 Top plate 40A Top surface 41 Bolt 42 Fixing nut 51 Convex part 52 Concave part

Claims (2)

A waist wall main body made of precast concrete, which has an anchor fixing part for fixing a waist wall fixing anchor to be integrated with the dirt floor concrete on the lower inner surface;
A foundation fixing plate fixed on the foundation concrete, a waist wall fixing plate fixed to the bottom of the waist wall main body, and a base wall fixing plate provided on the foundation fixing plate for adjusting the height of the waist wall fixing plate. A waist wall mounting tool consisting of a level adjustment section and
A method for constructing a waist wall, comprising :
fixing the waist wall mounting tool on the foundation concrete using the foundation fixing plate, and adjusting the height of the waist wall fixing plate using the level adjustment section;
fixing the waist wall main body on the waist wall fixing plate;
fixing the waist wall fixing anchor to the anchor fixing part of the waist wall main body;
attaching formwork to the upper surface of the foundation concrete at the lower part of the outer surface of the waist wall main body;
By pouring concrete including the space formed between the foundation concrete and the waist wall main body and the lower inner surface of the waist wall main body, an earthen floor concrete integrated with the waist wall fixing anchor is formed. Construction method of waist wall including. A waist wall main body made of precast concrete, which has an anchor fixing part for fixing a waist wall fixing anchor to be integrated with the dirt floor concrete on the lower inner surface;
A foundation fixing plate fixed on the foundation concrete, a waist wall fixing plate fixed to the bottom of the waist wall main body, and a base wall fixing plate provided on the foundation fixing plate for adjusting the height of the waist wall fixing plate. A waist wall mounting tool consisting of a level adjustment part,
a top adjustment tool fixed to the upper surface of the waist wall main body for adjusting the height of the waist wall top surface;
A method for constructing a waist wall, comprising :
fixing the waist wall mounting tool on the foundation concrete using the foundation fixing plate, and adjusting the height of the waist wall fixing plate using the level adjustment section;
fixing the waist wall main body on the waist wall fixing plate;
adjusting the height of the waist wall top surface using the top adjustment tool;
filling mortar between the upper surface of the waist wall main body and the top end surface of the waist wall;
fixing the waist wall fixing anchor to the anchor fixing part of the waist wall main body;
attaching formwork to the upper surface of the foundation concrete at the lower part of the outer surface of the waist wall main body;
By pouring concrete including the space formed between the foundation concrete and the waist wall main body and the lower inner surface of the waist wall main body, an earthen floor concrete integrated with the waist wall fixing anchor is formed. Construction method of waist wall including.

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