JP3752082B2 - Fabric foundation construction method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for constructing a fabric foundation of a building, and more particularly to an improvement in the excavated soil treatment and the soil concrete construction procedure.
[0002]
[Prior art]
Conventionally, the following methods are known as construction methods for building fabric foundations.
(1) Excavate a groove 1 wider than the footing width by an excavator or hand digging, and construct the split chestnut 2 and the discarded concrete 3. At this time, most of the excavated soil 4 is raised on both sides of the groove 1 for later use for backfilling (see FIG. 4A).
(2) The rebar 5 is arranged, and the discarded form 7 is built using a jig 6 (see Japanese Patent Laid-Open No. 8-105060) (see (b)).
(3) Concrete is cast inside the discard mold 7 to integrally form the footing 8 and the foundation beam 9 (see (c)).
(4) After curing for a certain period, the excavated soil 4 is backfilled on the footing 8 and the upper surface thereof is leveled (see (d)).
(5) The soil concrete 10 is constructed (see (e)).
[0003]
[Problems to be solved by the invention]
However, the construction method of such a fabric foundation has the following problems.
(1) Since both sides of the groove 1 where the excavated soil 4 is raised serve as a work passage, the scaffolding for workers who perform bar arrangement, abandonment formwork 7, concrete placement, etc. is bad and dangerous. This hinders construction progress.
(2) The excavated soil 4 raised on both sides of the groove 1 collapses when an operator walks along the work path or performs work such as laying the discarded form 7 or placing concrete, and the discarded form 7 Since the excavated soil 4 is mixed in the inside of the concrete and in the curing concrete, it is necessary to return the work to eliminate this, or the cross-sectional defect of the footing 8 occurs, and the predetermined quality cannot be secured. There is.
(3) Since it is necessary to perform curing for a certain period after the concrete placement of the footing 8, the excavated soil 4 cannot be immediately put on the footing 8, and the work is in a waiting state.
[0004]
Accordingly, in view of the above problems, the present invention provides a method for constructing a fabric foundation that can be applied to soil concrete immediately after finishing the concrete placement of the fabric foundation, because the scaffolding beside the excavated groove is good and does not collapse. The purpose is to shorten the work period and ensure the quality.
[0005]
That is, according to the first aspect of the present invention, after excavating a groove for a fabric foundation, a discarded mold for forming a footing and a foundation beam is built, and concrete is placed inside the discarded mold to obtain a cross section. In the construction method of constructing a convex fabric foundation, the thing related to the footing side of the abandoned formwork also serves as a retaining wall with the top end as a backfill level, and the top end of the retaining wall as a gauge, The excavated soil that has been raised beside the groove is flattened at the backfill level , and after the concrete is placed on the footing and before it is hardened, it is a spacer that can be buried and its top surface is backfilled. It is a cloth foundation construction method characterized in that it is laid on the top surface and soil concrete is placed over the upper surface of the spacer and the flattened ground surface beside the groove .
[0006]
In this way, the top end of the abandoned formwork on the side of the footing reaches the backfill level and also serves as a retaining wall, so that the excavated soil raised on the side of the groove will not collapse and safety is improved. At the same time, the excavated soil is not mixed inside the abandoned formwork, thereby facilitating the construction and ensuring the quality. In addition, the excavated soil raised beside the groove is flattened at the backfill level using the top edge of the abandoned formwork as a gauge, making it easier for workers to walk on it as a work passage. In addition, the preparation for placing concrete in the soil later is complete and the construction can be saved.
Even before the footing concrete is hardened in this way, if the spacer is laid on the upper surface and the upper surface is set to the backfill level, the upper surface of the flattened ground beside the groove is already buried. Since it is at the return level, it is possible to construct the soil concrete immediately after placing the foundation of the fabric without waiting, and to shorten the work period.
[0009]
Further, the invention described in claim 2 is characterized in that, in the invention described in claim 1 , the spacer comprises a plurality of molding blocks in which waste materials are reused.
[0010]
Thus, by making the spacer a waste material reuse product, it is possible to effectively use resources, and by constructing the spacer with a plurality of molding blocks, transportation becomes easy and workability is improved.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description, the same reference numerals are used for the same elements, and redundant descriptions are omitted.
[0012]
FIG. 1 is a process diagram for explaining an embodiment of a fabric foundation construction method according to the present invention, and is easy to compare with FIG. 4 which is a process diagram for explaining a conventional fabric foundation construction method. The process is shown correspondingly. Hereinafter, it demonstrates in order of a process, referring the same figure.
[0013]
(1) First, in the same manner as in the prior art, a groove 1 wider than the footing width is excavated by a shovel car or hand digging, and split chestnut 2 and discarded concrete 3 are constructed. At this time, most of the excavated soil 4 is raised to the side of the groove 1 for later use for backfilling (see FIG. 1A).
[0014]
(2) Next, the rebars 5 are arranged, the discard form 7 is built using the jig 6, and the excavated soil 4 on both sides of the groove 1 is leveled to flatten the ground (see ( b)). Here, the discard mold 7 is formed by re-molding waste materials such as pulverized foamed polystyrene with a binder interposed therebetween, and is inexpensive while maintaining sufficient strength, and sandwiches both side surfaces of the foundation beam 9. The discarded molds 7a and 7b and the discarded molds 7c and 7d sandwiching both side surfaces of the footing 8 are configured. The discarded molds 7a to 7c have the same dimensions as the conventional ones, but the discarded molds 7d are different from the conventional ones, and the height at which the top ends reach the backfill level when installed. have. The reason why the height of the discarded form 7d is made larger than the height required as a slab for the concrete placement of the footing 8 is the excavated soil that the discarded form 7d is raised to the side of the groove 1. This is because it also plays the role of 4 retaining walls. Therefore, as long as it serves as a retaining wall, it is sufficient that the top end of the discard mold 7d is higher than the backfill level. Here, the top end of the discard mold 7d is defined as the backfill level. The height is equal. This is because the excavated soil 4 raised on the side of the groove 1 with the top end of the discarded mold 7d as a gauge is flattened at the backfill level, and then the soil concrete 10 is placed thereon. In this example, the discarded mold 7c is the same as the conventional one, but it may be the same as the discarded mold 7d. That is, it is only necessary that the discard molds 7c and 7d have a height equal to or higher than the side surface height of the footing 8 and a height equal to each backfill level.
[0015]
The jig 6 is used for integrally placing concrete on the footing 8 and the foundation beam 9 of the fabric foundation, and is conventionally known (see FIG. 2). However, in the present invention, it is not always necessary for the concrete to be integrally placed on the footing 8 and the foundation beam 9 as long as the discarded form 7 can be installed at a predetermined position.
[0016]
(3) Then, concrete is cast inside the discarded mold 7 to form the footing 8 and the foundation beam 9 integrally (see (c)). This step is also performed in the same manner as in the prior art, but in the present invention, the footing 8 and the foundation beam 9 are not necessarily formed integrally. In addition, although the worker who lays concrete walks the upper surface of the excavated soil 4 raised on both sides of the groove 1 as a work passage, since this is flattened in the previous process, safety is improved. High and good workability.
[0017]
(4) Next, the waste material re-forming blocks 11 are laid on the footing 8 in a state where the cast concrete of the footing 8 is not yet cured (see (d)). The reason why the cast concrete is not yet hardened is to shorten the work period by omitting the curing period. Also, here, in the previous step, concrete is integrally placed on the footing 8 and the foundation beam 9, and then the waste material re-forming block 11 is laid on the footing 8, but the concrete is placed only on the footing 8, and the footing is performed. After laying the waste material re-forming blocks 11 on 8, concrete may be placed on the foundation beam 9. The waste material re-molding block 11 has a so-called spacer that has an upper surface that is the same height as the backfill level, and raises the ground surface to construct a flat soil concrete 10 at the backfill level after the completion of this process. To play a role. Therefore, here, the waste material re-forming blocks 11 are not laid on the footing 8 on the left side of the paper with a low backfill level (the same level as the top end of the footing 8).
[0018]
In addition, the waste material re-forming block 11 is a block obtained by re-molding waste materials such as pulverized foamed polystyrene with a binder interposed therebetween, and is inexpensive while maintaining sufficient strength and meets the demand for resource saving. It is. Moreover, since the waste material re-forming block 11 has a size and weight that can be easily carried by the operator, workability is good. Here, FIG. 3A shows a state in which the waste material re-forming blocks 11 are laid on the footing 8. As shown in the figure, when the worker places one waste material remolding block 11 on the footing 8, the next rides on it and places the next one waste material remolding block 11. In this way, a plurality of waste material re-forming blocks 11, 11,... Are successively laid on the footing 8 until the flat soil concrete 10 can be placed at the backfill level. FIG. 3B shows a state in which this work is completed. As shown in the figure, the interstitial concrete 10 to be placed in the next process enters a gap between the plurality of waste material remolding blocks 11, 11,. The soil concrete 10 is firmly integrated.
[0019]
In the present invention, the waste material re-molding block 11 may be changed to another one, for example, it may be replaced with a concrete block or the like. However, if the weight is too large, the weight balance of the fabric foundation is lost, which is not preferable in terms of structure. The same applies when the portion is made of concrete. In addition to the above requirements, the waste material remolding block 11 in the present invention needs to be capable of being buried. This is because the earthen concrete 10 will be depressed later when the spacer is made of a material that is buried and rotted.
[0020]
(5) Finally, the soil concrete 10 is constructed at the backfill level (see (e)). Since the flat surface at the backfill level is completed in the steps (2) and (4), this step may be performed in the same manner as in the prior art.
[0021]
As mentioned above, although one Embodiment of this invention was described, this invention is not restricted to this, It can change suitably about each part on the condition that the function is not impaired in each process. For example, the setting of the backfill level on the left and right sides of the fabric foundation, the arrangement of reinforcement, the material and size of the waste material re-molding block are not limited to those described in this embodiment, and appropriately meet the design conditions etc. It can be done.
[0022]
【The invention's effect】
As described above, according to the first aspect of the present invention, the top end of the discarded form frame on the footing side surface reaches the backfill level and also functions as a retaining wall, so that it is raised to the side of the groove. The excavated soil will not collapse and safety will be improved, and excavated soil will not be mixed inside the discarded formwork, thereby facilitating the construction and ensuring the quality. In addition, the excavated soil raised beside the groove is flattened at the backfill level using the top edge of the abandoned formwork as a gauge, making it easier for workers to walk on it as a work passage. In addition, the preparation for placing concrete in the soil later is complete and the construction can be saved.
Even before the concrete of the footing is hardened, the upper surface of the flattened ground beside the groove is already at the backfill level by laying a spacer on the top surface and setting the top surface to the backfill level. Therefore, it is possible to construct the soil concrete immediately after placing the fabric foundation concrete without waiting, and the construction period can be shortened.
[0024]
Furthermore, according to the invention described in claim 2 , since the spacer is a waste material reused product, it is possible to effectively use resources, and since the spacer is constituted by a plurality of molding blocks, the transportation is facilitated. Sexuality improves.
[Brief description of the drawings]
FIG. 1 is a process diagram for explaining one embodiment of a fabric foundation construction method according to the present invention.
FIG. 2 is a perspective view showing details of the jig shown in FIG.
3A and 3B are diagrams for explaining the process of FIG. 1D, wherein FIG. 3A is a perspective view showing a state of work for laying a waste material re-forming block, and FIG. 3B is a state in which the work is completed; FIG.
FIG. 4 is a process diagram for explaining a conventional cloth foundation construction method.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Groove 2 ... Split chestnut 3 ... Abandoned concrete 4 ... Excavated soil 5 ... Reinforcement 6 ... Jig 7 ... Abandoned formwork 8 ... Footing 9 ... Foundation beam 10 ... Dirt concrete 11 ... Waste material re-forming block

Claims (2)

After excavating the groove for the fabric foundation, constructing a fabric foundation with a convex section by laying concrete inside the discarded mold frame to build a footing and a foundation beam. ,
Of the abandoned formwork, the one related to the footing side also serves as a retaining wall with the top edge as the backfill level, and the top edge of the retaining wall is used as a gauge to refill the excavated soil raised beside the groove with flattening at the level,
After the concrete placement of the footing and before its hardening, a spacer that can be buried and whose upper surface is the backfill level was laid on the footing, and the upper surface of this spacer and the side of the groove were flattened. A cloth foundation construction method characterized by placing soil concrete over the upper surface of the ground . Fabric basis construction method according to claim 1, characterized by comprising a plurality of shaped blocks which the spacer is to reuse waste.

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