JPS59106627A - Construction work of foundation structure - Google Patents

Abstract

PURPOSE:To efficiently construct a foundation at low cost by a method in which a trench is excavated in the ground, a soil solidifying agent is mixed with soil on the bottom of the trench to form a mixed soil layer, and a foundation is formed on the mixed soil layer. CONSTITUTION:A trench 12 is pitexcavated in the ground, and the trench 12 is embedded with a part of the excavated soil 13. A soil solidifying agent 14 is uniformly spread over the surface of the embedded soil 13 and then mixed together with stirring by means of a farming implement to form a mixed layer 15. The mixed layer is wetted by spraying of water and compacted, and a concrete foundation 17 is formed on the mixed layer 15.

Description

[Detailed description of the invention] The present invention relates to a construction method for a foundation structure.

Conventionally, when constructing the foundation of a building, mainly a house, as shown in Fig. 1, a groove 2 of a predetermined depth is cut in the ground 1,
A chestnut stone 3 is laid at the bottom of this groove 2, and then the layer of the chestnut stone 3 laid in the groove 2 is compacted by a rolling machine 4, and then the chestnut stone 3 is
Generally, a construction method was used in which a concrete foundation 5 was formed above the base.

This construction method has the disadvantage that the work efficiency is extremely low because the chestnut stone brought in by truck or the like must be laid uniformly at the bottom of the groove 2 by hand.

Moreover, as quality chestnut stone has become scarce in recent years, the process of laying chestnut stone has become a factor in increasing costs.

An object of the present invention is to provide a method for constructing a foundation structure that can be constructed efficiently and at reduced costs.

Therefore, in the present invention, a groove is cut in the ground, a mixed layer made of a mixture of soil and a soil assimilation treatment agent is formed at the bottom of the groove, and a foundation is formed on this mixed layer. t
, b. By eliminating the work of laying chestnut stones in conventional construction methods, it is possible to construct the foundation structure efficiently and at low cost.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 2 shows the construction method of this embodiment. In this construction method, a groove 12 of a predetermined depth is cut in the ground 11, and then a part of ±13 excavated by the root cutting is backfilled into the groove 12. Here, the soil solidification treatment agent 14 is uniformly sprayed on the surface of ±13 that has been backfilled into the groove 12. Soil solidification treatment agent 1
4, a cement-based assimilation agent is mainly used, but if the ground 11 is clayey soil, a lime-based solidification agent is used. By the way, in the case of a cement-based assimilation treatment agent, ±13 dropped into the groove 12 is 60 compared to 1-.
Apply a cement-based solidifying agent of about kl to 100 kP to groove 1.
When dropped into 2, the strength is axial compressive strength of 4 ky /
crl, and has sufficient strength as a supporting ground for structures.

Subsequently, the soil 13 and the soil solidification treatment agent 14 dropped into the trench 12 are crushed and stirred using, for example, a tiller to form a mixed layer 15. Here, after water is sprinkled on the mixed layer 15, it is rolled by a rolling machine 16, and a base 17 of the concrete sea bream is formed on the mixed layer 15. In forming the foundation 17, first, the footing part 18 is placed on the mixed layer 15, and then a rising part 19 is formed vertically upward from the ground 11 from approximately the center of the footing part 18.

Therefore, in the case of this embodiment, a part of the ±13 excavated when the root was cut into the ground 11 and the soil solidification treatment agent 14 are mixed to form a mixed layer 15 in the trench 12, and this mixture layer 15
Since the foundation 17 is formed on top of the foundation 17, it is possible to eliminate the work of laying chestnut stone in the conventional construction method. As a result, it is not necessary to use comparatively expensive chestnut stone, and the soil assimilation treatment agent 14 can be used, which is cheaper than chestnut stone. Therefore, costs can be reduced. Furthermore, since the manual work of laying the stone is no longer necessary, each process can be performed by machines, and as a result, work efficiency can be improved.

In addition, in forming the mixed layer 15, in addition to the method explained in FIG. 2, the method shown in FIG. 3 may be used. This method involves cutting a trench 12A shallower than the trench 12 in the ground 11, then spraying the soil assimilation treatment agent 14 on the bottom of the trench 12A, and then uniformly excavating the bottom of the trench 12A while digging up the soil. The solidification treatment agent 14 and crushed soil are stirred to form a mixed layer 15. According to such a construction method, it is not necessary to backfill the soil 13 excavated by root cutting into the trench 12, so more efficient work can be expected.

In addition, the thickness of the mixed layer 15 or the mixing ratio of soil and soil solidification treatment agent can be adjusted to match the soil quality by selecting an appropriate value according to the soil survey results, which are usually carried out before carrying out land works. You can do the best local business.

Further, the foundation 17 is not limited to the illustrated footing foundation, but may be a peta foundation, for example.

As explained in the above explanations 1 to 1, according to the present invention, it is possible to provide a method for constructing a foundation structure that can efficiently and inexpensively construct a foundation structure.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing a conventional construction method, FIG. 2 is an explanatory diagram showing an embodiment of the present invention, and FIG. 3 is an explanatory diagram showing a modification thereof. 11...Ground, 12...Ditch, 13...Soil, 14.
...Soil solidification treatment agent, 15...Mixed layer, 17...Foundation. Agent: Patent attorney Minoru Kinoshita (and 1 other person)

Claims (1)

[Claims] (1) Cutting a groove in the ground, forming a mixed layer of soil and a soil solidification treatment agent at the bottom of the groove, and forming a foundation on top of this mixed layer. A construction method for foundation structures characterized by: (2. In claim 1, a predetermined amount of soil excavated by root cutting and a soil solidification treatment agent are dropped into the trench, and the soil and soil consolidation treatment agent are mixed with a A construction method for a foundation structure characterized by forming a mixed layer. (3) According to claim 1, a groove of a predetermined depth is cut in the ground, and the bottom of the groove is further cut to a certain depth. A method for constructing a foundation structure, characterized in that the mixed layer is formed by stirring with the soil solidification treatment agent while digging down. (4) In any one of claims 1 to 3, A method for constructing a foundation structure, characterized in that the soil solidification agent is a cement-based solidification agent. (5) In any one of claims 1 to 3, the soil solidification agent comprises: A construction method for a foundation structure characterized by using a lime-based solidifying agent.