JPH06185079A - Sump water pit structure of underground foundation - Google Patents

Abstract

PURPOSE:To prevent flow or stoppage of sump water by laying and arranging seepage water treatment blocks on foundation slab and by providing waterproofing membrane over the blocks and putting heavyweight filler further on the waterproofing membrane. CONSTITUTION:A sump water pit 1 is provided with a footing beam 2, a foundation slab 3 and the lowest floor slab 4. Then, seepage water treatment blocks 6 are laid and arranged all over the foundation slab 3. A waterproofing membrane 7 is provided further on the blocks 6. A heavyweight filler 8 is put on the waterproofing membrane 7. The above structure facilitates draining from the seepage water pit 1, does not bring about obstruction of drainage for a long time, and prevents moisture from coming into the basement because between the seepage water treatment blocks 6 and the heavyweight filler 8 the waterproofing membrane 7 is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underground foundation spring pit structure.

[0002]

2. Description of the Related Art As shown in FIG. 2, an underground foundation of a conventional building having a basement is a solid foundation, and a spring pit 1 is a foundation beam 2, a foundation slab 3, and a floor slab 4 at the bottom floor.
The drainage pipe 9 collects the spring water seeping from the earth pressure wall 5 into the spring pit 1, and the drainage pipe 10 discharges the spring water to the outside. Laying a film 7 ', the bottom floor slab 4
Is designed to be waterproof.

In such a spring pit, for example, in the case of a relatively low-floor building constructed in a location where the groundwater level is high, the load of the entire building is higher than the groundwater pressure acting on the foundation slab 3 and the like. Since it is light, the structure may rise, and in the case of a tower-shaped structure, an upward pulling force may be generated on the foundation beam during an earthquake. It was filled with ′ and used as a weight.

However, in the case of a spring pit filled with such gravel, the flow of water in the spring pit is poor and
There were problems such as time-consuming drainage, rising humidity in the basement, and difficulty in draining due to blocked spring water for a long period of time.

[0005]

Therefore, the present invention is
The purpose is to provide a spring pit structure with an underground foundation that improves the flow and clogging of spring water.

[0006]

That is, according to the present invention, a spring treatment block is laid on a foundation slab that constitutes a spring pit of an underground foundation, and a waterproof layer is provided on the spring treatment block. A spring pit structure for an underground foundation, characterized in that a heavy packing material is filled on the waterproof layer.

The present invention will be described in detail below mainly with reference to FIG.

In the spring pit structure of the present invention, the spring pit 1 is composed of a foundation beam 2, a foundation slab 3 and a floor slab 4 at the bottom floor so that water seeping from the foundation slab 2, earth pressure wall 5, etc. The discharge to the outside through the water pit is the same as the conventional one. However, in the present invention, the spring block 6 having a good drainage property is laid on the entire surface of the foundation slab 3 constituting the spring pit 1, and the waterproof layer 7 is provided on the spring treatment block 6.
And the weight filler 8 is filled on the waterproof layer 7.

The spring water treatment block 6 is composed of a block having a good drainage property, which is provided with a water flow passage inside and / or outside, as used in the KP mat construction method developed by the applicant. As the material of the spring treatment block 6, for example, concrete, reinforced concrete, reinforced concrete, ceramics, or the like which is excellent in water resistance and load resistance is preferable.

The waterproof layer 7 provided on the spring water treatment block 6 is for blocking the upper layer 8 of the heavy filler and waterproofing the lowermost floor slab 4 and the like. In the waterproof layer 7,
A material having waterproof property and load bearing property such as polyethylene or reinforced plastic film or sheet is used.

Unlike the conventional gravel 8'of a spring pit, the heavy filler 8 in the present invention does not serve both as a weight and a drainage channel, but is used exclusively as a weight.

The weight filler 8 includes gravel, crushed stone, etc.
Fillers of appropriate shape such as magnetite, limonite, barite, which are also used as aggregates for heavy concrete, are used.

Since these heavy fillers 8 do not need to be used for drainage, their shapes can be selected appropriately.

Further, the drain pipe 9 for taking out the spring water that permeates from the outer wall 5 is connected to the spring water treatment block 6 so that the spring water does not go to the eight layers of the weight filling material. The water from the spring treatment block 6 is discharged to the outside by the drain pipe 10.

According to the underground foundation spring pit structure having the above-mentioned structure, the spring water in the spring pit 1 is promptly discharged by the spring treatment block 6 having a good drainage property, so that the drainage water is discharged. It is easy and does not cause clogging of the drainage channel in the long term, and the waterproof layer 7 blocks the spring treatment block 6 and the heavy packing material 8. It never reaches.

In the spring pit structure of the present invention, for example, a spring treatment block 6 is laid on the foundation slab 3 after the construction of the spring pit frame, and the waterproof layer 7 is provided on the spring treatment block 6.
And then filling the weight of the waterproof layer 7 with the weight filler 8 can be constructed.

[0017]

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

(1) The flow of the spring water in the spring pit is good, the drainage is easy, and the spring water is not clogged in the long term.

(2) Since a large amount of spring water does not stay in the spring pit and the spring water and the heavy packing material are blocked by the waterproof layer, moisture does not reach the basement.

[Brief description of drawings]

FIG. 1 is a sectional view illustrating a spring pit structure of the present invention.

FIG. 2 is a cross-sectional view showing a conventional spring pit structure.

[Explanation of symbols]

 1 Spring pit 2 Foundation beam 3 Foundation slab 4 Bottom floor slab 5 Earth pressure wall 6 Spring treatment block 7 Waterproof layer 7'Polyethylene film 8 Heavy packing material 9 Drain pipe 10 Drain pipe

Claims (1)

[Claims] 1. A spring water treatment block is laid out on a foundation slab that constitutes a spring water pit of an underground foundation, a waterproof layer is provided on the spring water treatment block, and a weight filler is further filled on the waterproof layer. The spring pit structure of the underground foundation that is characterized by that.