JPH08232273A - Method for constructing stabilizer-equipped mat foundation - Google Patents

Abstract

PURPOSE: To prevent uneven settlement of a mat foundation for a wooden house or a low-rise house. CONSTITUTION: As a trench used for constructing a stabilizer and adjusted in width and depth (normally 200 to 500mm wide and 600 to 1200mm deep) depending on the strength of a portion where a house foundation is to be constructed or the ground nearby is excavated, improved soil obtained by mixing of soil cement with reinforcing fibers of vinylon type or the like therein and soil is substituted. This soil-substituted part 13 is rolled by a rammer or the like to construct a stabilizer 11 where the soil is improved. After a small channel 14 is excavated in the top surface of the stablizer and rib reinforcement 16 is provided therein, the rib reinforcement 16 is bound or welded to mat foundation reinforcement 17. Next, concrete is poured into the small channel 14 and the mat foundation, and a rib 15 molded by the small channel 14 in the top surface of the stabilizer is integrated with the mat foundation 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solid foundation method with a stabilizer for suppressing uneven settlement.

[0002]

2. Description of the Related Art A solid foundation, driving a friction pile, and
Or the combination of both is performed. In any case, due to the nature of cohesive soil, there is a risk of settlement due to consolidation and plastic deformation, and if this causes uneven settlement, the use of the building will be hindered.

[0003]

The conventional cloth foundation method requires a large amount of excavated soil, the rigidity of the foundation itself is low, and the number of man-hours required for formwork and bar arrangement is large. In the case of soft ground, there is uneven settlement, and since the rigidity of the foundation is low, cracks occur when an earthquake occurs, causing great damage to the building. The solid foundation method that also uses friction piles requires friction piles, so the cost is high and the construction period cannot be shortened. An object of the present invention is to provide a low-cost solid foundation method that is less likely to cause uneven settlement and is premised on equal settlement.

[0004]

In order to achieve the above object, the present invention provides a stable material by digging a groove in a portion where a building foundation is to be constructed, and then a solid foundation is placed on the stabilizing material to stabilize the building. It is to build a solid foundation with lumber. According to claim 1, the width and the depth are adjusted near the foundation construction portion depending on the strength of the ground (usually, the width is 200 to 500 mm and the depth is 600 to 1200).
(mm) excavating a groove for stabilizing material, and at the same time, replacing soil soil with soil cement or soil cement mixed with vinylon-based and other reinforcing fibers with soil and rolling the soil replacement portion with a rammer etc. A stabilizer with improved soil quality with strength and toughness was made, a small groove for rib formation of a predetermined width was formed on the upper surface of the stabilizer, and a rib bar was provided in the groove to fix the solid foundation bar. Then, concrete is poured into the small groove and the solid foundation portion to integrate the rib formed by the small groove in the upper surface of the stabilizer and the solid foundation.

According to a second aspect of the present invention, concrete is cast in the small groove and in the solid foundation portion to integrate the ribs in the upper surface of the stabilizer and the solid foundation, and then the concrete is formed on the outer peripheral portion of the rising portion above the solid foundation. It is characterized in that a finishing material with good adhesion to and is built as it is as a formwork, a waste formwork is built inside, and concrete for the foundation rise construction is placed.

A third aspect of the present invention is that the required number of on-site piles (soil cement or soil cement mixed with vinylon-based or other reinforcing fibers) is used to simultaneously mix soil and water in a solid foundation construction area which is soft ground. (Site pile to be made together) is built, and a continuous groove for stabilizing material is drilled around the soil surrounding the bearing capacity of which is strengthened by the above-mentioned pile, and at the same time soil cement or vinylon-based other reinforcing fiber Soil cement mixed with soil is mixed with soil to replace it with soil, and the soil replacement part is compacted with a rammer to create a stabilizer with improved soil quality with soil strength and toughness. After forming a small groove for rib forming of the above, and providing a reinforcing bar for the rib in the small groove and fixing it with the solid foundation bar arrangement, concrete is poured into the small groove, the top of the pile piled on site and the solid foundation part to form the small groove. Molded by Characterized by integral ribs and the and the solid foundation site droplet 設杭 top.

According to a fourth aspect of the present invention, concrete is placed in the small groove and the solid foundation portion to integrate the ribs in the upper surface of the stabilizer, the tops of the cast-in-place piles, and the solid foundation, and then the outer periphery of the foundation rising formation portion. The feature is that a finishing material with good adhesion to concrete is built into the part as it is as a formwork, and a waste formwork is built inside and the concrete for foundation construction is placed.

[0008]

[Operation] While excavating the trench groove by the required width corresponding to the building foundation part, soil cement or soil cement mixed with vinylon-based or other reinforcing fibers is mixed with soil and water to replace the soil, and the soil replacement part By using a rammer, etc., to compact a stable material with improved soil quality that gives soil strength and toughness. A small groove for rib construction of a predetermined width is excavated on the upper surface of the stabilizer, and a rib reinforcement is set in the small groove to fix the solid foundation reinforcement, and then concrete is placed in the small groove and the solid foundation portion. Then, the ribs in the upper surface of the stabilizer are integrated with the solid foundation. The height of the stabilizer is determined by the condition of the ground. The soil surrounded by the stabilizer and the solid foundation becomes a rigid body.

When the stabilizer and the field-casting piles are used together, a required number of field-casting piles (soil cement or vinylon-based or other reinforcing fibers are mixed in the solid foundation construction area of soft ground). Construct a field pile) that is made by mixing and stirring soil and water at the same time using cement. A groove for continuous stabilizer formation surrounding a soil reinforced with field piles is excavated to produce a stabilizer with improved soil quality having soil strength and toughness as described above. After the rib reinforcement is set in the small groove on the upper surface of the stabilizer to settle with the solid foundation reinforcement, concrete is placed in the small groove, on-site cast pile top and solid foundation part and the rib formed by the small groove. The top of piles cast on site and the solid foundation are integrated.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the drawings. FIG. 1 is a sectional view of one embodiment of the present invention. As shown in the figure, trenches are dug at appropriate intervals in the building foundation to form the stabilizer 11, and concrete is placed thereon to construct the solid foundation 10 with the stabilizer. At that time, the stabilizer 11 adjusts the width W and the depth H depending on the strength of the ground (usually, the width 200 to
500 mm, depth 600 to 1200 mm).
In addition, the stabilizer is constructed so as to divide the foundation bottom plate into approximately four or six equal parts when seen from a plane.

In order to form the stabilizer 11, the soil is excavated at the foundation forming position, and at the same time, soil is mixed with soil cement (or soil cement containing vinylon type, carbon fiber or other reinforcing fiber) to obtain soil quality. Is replaced, and the soil replacement portion is compacted with a rammer or the like to provide a stable soil material having improved soil strength and toughness. Soil cement is usually mixed in a soil content of about 100 to 200 kg / m3.

A small groove 14 for rib construction having a predetermined width is excavated in the longitudinal direction of the upper surface of the stabilizer 11, and rib reinforcing bars 16 are provided in the small groove 14 at predetermined intervals to bind or weld the solid foundation bar 17 to each other. Establish. Next, concrete is poured into the small groove and the solid foundation portion to integrate the rib 15 formed by the small groove 14 and the solid foundation 10, and then the foundation rising portion 18 is formed to form the upper structure as usual. To construct.

The foundation rising portion 18 may be constructed by building a normal formwork and removing the formwork after placing concrete, but as shown in FIG. 1, the outer peripheral portion of the foundation rising portion has good adhesion to concrete. The finishing material 22 may be used as it is as a formwork, the discarding formwork 21 may be built inside, and the concrete for building up the foundation rising part may be placed so that the work of removing the formwork after hardening the concrete may be omitted.

In the illustrated example, the stabilizer 11 is drilled in the longitudinal direction of the upper surface to form the rib-building small groove 14 having a predetermined width. However, the small groove may be formed by a method other than the drilling. For example, the soil-improved portion 13 is preliminarily compacted by a rammer or the like, and flaps are embedded in the compacted upper surface (not shown),
Finally, after rolling to form a stabilizer having improved ground strength, the flap square member on the upper surface of the stabilizer 11 may be removed to form a rib-building small groove having a predetermined width.

2 and 3 show another embodiment. In this case, first, the required number of unreinforced spot-casting piles 25 are formed in the solid foundation construction area which is the soft ground. On-site pile 25
Is constructed by mixing soil cement with excavated soil in the drilled pile holes (for example, 300 kg / m 3) and filling the slurry with water added thereto. This on-site pile 2
5 has a purpose as a stabilizer, not as a support pile. Mixing soil cement (or soil cement mixed with vinylon-based or other reinforcing fibers) and soil while excavating a continuous trench groove for stabilizing material in the construction area reinforced by the field pile 25 Replace soil. The soil replacement portion 13 is compacted by a rammer or the like to form a stabilizer 11 with improved soil quality having soil strength and toughness, and a rib-building small groove 14 having a predetermined width is excavated on the upper surface of the stabilizer, and the inside of the small groove is formed. A solid foundation bar arrangement 1 by providing rib arrangements 16 at predetermined intervals.
After bundling or welding with No. 7, concrete is cast in the small groove and the solid foundation to integrate the ribs 15 in the upper surface of the stabilizer, the top of the on-site cast pile 25 and the solid foundation 10 (FIG. 2). .

In the case of FIG. 2 as well, concrete is placed in the small groove 14 and the solid foundation portion to form the rib 1 in the upper surface of the stabilizer.
After integrating 5 and the solid foundation, a finishing material with good adhesion to concrete is built into the outer peripheral portion of the foundation building portion as it is as a formwork 22, and a discarding formwork 21 is built inside to form a foundation rising part. 18 The construction of the foundation is completed by placing concrete for construction.

[0017]

As described above, according to the present invention, a stabilizer having an improved soil quality is made on a foundation or the like, a small groove for rib formation is formed on the upper surface of the stabilizer, and a rib provided in the small groove is used. Since the reinforcement is fixed on the solid foundation reinforcement, the reinforced concrete formed in the groove becomes a strong stabilizer that is integral with the solid foundation. That is, the soil surrounded by the stabilizer and the solid foundation becomes a rigid body. Also, when using both stabilizers and on-site piles, it becomes significantly stronger than the surrounding soil,
Moreover, since the stabilizer, the cast-in-place pile, and the solid foundation are integrated, uneven settlement of the building can be largely prevented.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a solid foundation method of the present invention.

FIG. 2 is a cross-sectional view of another example of the solid foundation method of the present invention.

FIG. 3 is a plan view of FIG. 2;

[Explanation of symbols]

 10 Solid Foundation 11 Stabilizer 13 Soil Replacement Part 14 Small Groove 15 Rib 16 Rib Reinforcing Bar 17 Solid Foundation Reinforcing Bar 18 Foundation Rise 21, 22 Formwork 23 Tie Bar 25 Field Pile

Claims (4)

[Claims] 1. A trench for stabilizing material, the width and depth of which are adjusted depending on the strength of the ground, is excavated near the foundation construction portion, and at the same time soil cement or soil cement mixed with vinylon-based or other reinforcing fibers and soil are formed. Is replaced with mixed soil, and the soil replacement part is compacted with a rammer etc. to create a stabilizer with improved soil quality that has soil strength and toughness, and a small groove for rib formation with a predetermined width is formed on the upper surface of the stabilizer. The ribs and solid foundations formed by the small grooves in the upper surface of the stabilizer by placing rib reinforcements in the small grooves and fixing them with the solid foundation reinforcements, and then placing concrete in the small grooves and the solid foundation portion Solid foundation method with stabilizer, which is characterized by integrating and. 2. The concrete is placed in the small groove and the solid foundation portion to integrate the ribs in the stabilizer upper surface with the solid foundation, and then the concrete is attached to the outer peripheral portion of the rising portion of the solid foundation upper portion. The solid foundation method with a stabilizer according to claim 1, characterized in that a finishing material having good properties is built as it is as a formwork, a discarding formwork is built inside, and concrete for foundation rise construction is placed. 3. A required number of on-site cast piles are constructed in a solid foundation construction area which is soft ground, and a continuous groove for stabilizing material is excavated surrounding the soil reinforced by the on-site cast piles. However, the soil is mixed with soil cement or soil cement mixed with vinylon-based or other reinforcing fibers and the soil is replaced, and the soil replacement part is compacted with a rammer etc. to improve soil strength and toughness. A small groove for rib formation having a predetermined width is formed on the upper surface of the stabilizer, and a rib bar is provided in the groove to fix it to a solid foundation bar. A solid foundation method with a stabilizer, characterized in that the ribs formed by small grooves are cast into the solid foundation portion, the top of the pile cast on site and the solid foundation are integrated. 4. The concrete is cast in the small groove and in the solid foundation portion to integrate the ribs in the stabilizer upper surface, the top of the cast-in-place pile and the solid foundation, and then the concrete is formed in the outer peripheral portion of the foundation rising formation portion. The solid foundation with a stabilizer according to claim 3, characterized in that a finishing material having good adhesiveness with is built in as a form as it is, a discarding form is built inside, and concrete for foundation formation is placed. Construction method.