JPH06193079A - Construction of underground foundation - Google Patents

Abstract

PURPOSE:To prevent spring water from stagnating in an underground foundation by building a water barrier along an outer foundation beam in a spring water treatment space, and providing a dewatering trench around an underground foundation structure. CONSTITUTION:The riser wall 10 of a reinforced concrete building is formed out of a foundation slab 2, and a block wall 11 such as concrete is laid on the wall 10 up to the lower surface of a floor slab 2. Also, a water barrier 9 is formed. At the same time, a drain pipe 14 is buried in a foundation beam 1. In addition, dewatering slope is formed on the bottom 13 of a dewatering trench 12 with an intermediate position kept highest. Then, spring water permeating through an earth pressure wall 5 or the like via the trench 12 is discharged outside from a dewatering pit. In this case, the spring water is prohibited from reaching spring water treatment space 4 other than the trench 12. According to this construction, dewatering efficiency can be improved, and the appearance of a fly, a mosquito or the like can be prevented, due to the non-existence of stagnating water.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underground foundation structure which solves the problems caused by the accumulation of spring water in the underground foundation of a building.

[0002]

2. Description of the Related Art Conventionally, an underground foundation structure of a building having a basement is shown in FIG. 3 (a view taken along the line EE in FIG. 4) and FIG.
As shown in FIG. 4D), a so-called solid structure is used, and the space between the foundation slab 2 installed between the foundation beams 1 and the floor slab 3 arranged above the foundation slab 3 is used as a spring treatment space 4, and earth pressure is applied. Wall 5
And a block wall 6 are provided with a drainage groove 7, the drainage groove 7 and the spring treatment space 4 are communicated with each other by drainage pipes 8 and 19, and a large number of drainage pipes 20 are embedded in the inner foundation beam 1, Connecting surface 16 of earth pressure wall 5, cold joint 17, foam tie 1
8. The spring water seeping from the foundation slab 2 and the like is guided in the direction of arrow b and discharged from the spring pit 15 to the outside.

However, in such an underground foundation structure, the spring water flows through the entire spring treatment space 4, but in some cases, the spring water stays, and the source of odors, mosquitoes, flies, etc. due to the decay of the spring water. There was a problem that it became or the humidity reached the upper floor.

[0004]

Therefore, the present invention is
The purpose is to provide an underground foundation structure that prevents the retention of spring water in the underground foundation.

[0005]

That is, the present invention relates to an underground foundation structure having a spring treatment space composed of a foundation slab and a floor slab that are installed between foundation beams, and an outside is provided inside the spring treatment space. The present invention relates to an underground foundation structure characterized by constructing a drainage groove around the underground foundation structure by constructing an impermeable wall along the foundation beam.

The present invention will be described in detail below with reference to FIG. 1 (a view taken along the line BB in FIG. 2) and FIG. 2 (a view taken along the line A in FIG. 1).

In the underground foundation structure of the present invention, the foundation slab 2 and the floor slab 3 are installed between the foundation beams 1, and the foundation beam 1, the foundation slab 2 and the floor slab 3 are provided.
Constitutes a wastewater treatment space 4 for draining spring water. The drainage treatment space 4 communicates with the gap 7 between the earth pressure wall 5 and the inner block wall 6 by the drainage pipe 8, and the earth pressure wall 5
Spring water that permeates from the joint surface, cold joint, foam tie, etc. is guided to the wastewater treatment space 4.

In the wastewater treatment space 4, an impermeable wall 9 is constructed along the foundation beam 1 located outside the underground foundation structure, and a drainage groove 12 is formed between the foundation beam and the impermeable wall 9. is doing. In this case, the distance between the outer foundation beam 1 and the impermeable wall 9,
That is, the width of the drainage groove 12 is, for example, about 400 to 1000 mm.
It is a degree. The impermeable wall 9 can be formed by an appropriate method as long as it has a desired impermeable function for a long period of time, but as a preferred example thereof, as shown in FIG. 1, a rising wall 10 made of a reinforced concrete structure from a foundation slab 2 is used. And a block wall 11 made of concrete or the like is laid on the rising wall 10 up to the lower surface of the floor slab 3. However, the block wall 11 does not have to be built if the floor immediately above does not dislike the humidity.

A drainage pipe 14 is buried in the foundation beam 1 which crosses the flow direction of the spring in the drainage groove 12 when the concrete is placed. Further, it is preferable that a drainage gradient is provided on the bottom surface 13 of the drainage groove 12 from above water to below water with the middle point C being the highest point and using mortar, concrete or the like.

The spring water flows in the drainage groove 12 in the direction of arrow a,
It is drained from the drainage pit 15 to the outside.

In the underground foundation structure of the present invention, the spring water no longer reaches the spring water treatment space 4 other than the drainage groove 12. Therefore, the spring water treatment space 4 other than the drain groove 12 can be provided with functions other than the spring water treatment. For example, filling the inside with a heavy filler such as gravel,
By pouring concrete, the load of the entire building can be increased to prevent the building from rising in the location of high groundwater level, and in some cases, it can be utilized as a basement space for another purpose.

In the underground foundation structure of the present invention, the spring water seeping from the earth pressure wall 5, the foundation beam 1, etc. flows only in the limited drainage grooves 12 around the spring water treatment space 4, The drainage efficiency is improved compared to the case where the spring water flows through the entire spring water treatment space 4 like the conventional underground foundation structure, and moreover,
The amount of accumulated water is reduced, so that foul odors, flies, mosquitoes, etc. can be prevented, and the risk of moisture reaching the upper floors is reduced.

[0013]

According to the underground foundation structure of the present invention, the following effects are exhibited.

(1) The drainage efficiency of spring water is improved.

(2) The amount of accumulated water in the spring water treatment space is small, and it is possible to prevent foul odors, flies, and mosquitoes.

(3) There is little risk that moisture will reach the upper floor.

(4) Most of the spring water treatment space can be effectively utilized for increasing the building load, for other functions such as basement space, and for other purposes.

[Brief description of drawings]

FIG. 1 is a vertical sectional view illustrating an underground foundation structure of the present invention.

FIG. 2 is a plan sectional view illustrating an underground foundation structure of the present invention.

FIG. 3 is a vertical cross-sectional view of a conventional underground foundation structure.

FIG. 4 is a plan sectional view of a conventional underground foundation structure.

[Explanation of symbols]

 1 Foundation Beam 2 Foundation Slab 3 Floor Slab 4 Wastewater Treatment Space 5 Earth Pressure Wall 6 Block Wall 7 Gap 8 Drain Pipe 9 Impermeable Wall 10 Rising Wall 11 Block Wall 12 Drain 13 Drain Bottom 14 Drain 15 Drain Pit 16 Connecting surface 17 Cole joint 18 Form tie 19 Drain pipe 20 Drain pipe

Claims (1)

[Claims] 1. In an underground foundation structure having a spring treatment space composed of a foundation slab and a floor slab installed between foundation beams, an impermeable wall is constructed in the spring treatment space along the outer foundation beam. By doing so, the underground foundation structure is characterized in that drainage trenches are constructed around the underground foundation structure.