KR101969703B1 - Construction method of ground foundation for block and removal radon gas - Google Patents

Abstract

The present invention relates to a building floor foundation construction method for blocking and removing radon gas, which can prevent gas-phased radon generated in soil under a building, and can collect radon gas and discharge and remove the same in the air to prevent the radon from flowing into the building. The building floor foundation construction method can comprise a cutting step, a vinyl installation step, a waste concrete application step, an insulator installation step, a gravel spreading step, a collection mat installation step, a collection pipe installation step, and a finishing material construction step, or can comprise the cutting step, a grade beam installation step, a soil filling step, the vinyl installation step, the waste concrete application step, the insulator installation step, the gravel spreading step, the collection mat installation step, the collection pipe installation step, and the finishing material construction step. Moreover, a membrane installation step can be further included when a measurement value of radon gas in soil is 10,000 Bq/m^3 or more.

Description

CONSTRUCTION METHOD OF GROUND FOUNDATION FOR BLOCK AND REMOVAL RADON GAS}

The present invention relates to a building floor foundation construction method for the blocking and removal of radon gas, and more particularly, it is possible to block radon in the form of gas generated in the soil in the basement of the building, and to collect and remove the radon gas into the atmosphere. The present invention relates to a building floor foundation construction method for blocking and removing radon gas, which can prevent radon from entering a building interior.

In general, radon (Rn) is a gaseous radioactive material produced by the radioactive decay process of uranium and thorium contained in the earth's crust.

Radon's isotopes ²¹⁹ Rn, ²²⁰ Rn, and ²²² Rn are produced as intermediates of the natural radioactive decay chains of uranium and thorium, where ²¹⁹ Rn is at ²³⁵ U of natural decay (actinium series), ²²⁰ Rn is ²³² Th of natural decay ( Thorium), and ²²² Rn is ²²³ Ra (t1 / 2 = 11 days), ²²⁴ Ra (t1 / 2 = 3.66 days), ²²⁶ Ra (t1 / 2 = 1600) at ²³⁸ U spontaneous decay (uranium series), respectively. Is produced by α decay.

Radon is found in uranium ores, phosphate, igneous and metamorphic rocks, limestone, soil and petroleum, trace amounts are contained in the atmosphere and the earth's crust. Therefore, radon can accumulate at higher concentrations than in the outside atmosphere in rooms or basements in some poorly ventilated buildings.

In addition, radon is a colorless, odorless and tasteless inert gas, and because it is mobile and heavier than air, radon remaining in surrounding construction materials, soil, and groundwater is concentrated in the basement through cracks of soil, cement, and ground. It may be introduced into the room, and even if the concentration of radon in the indoor atmosphere is low, it may be absorbed by the human body and damage the lung by generating radiation.

The National Cancer Center (NCI) defines radon as a first-class carcinogen along with asbestos, and the US Environmental Protection Agency (EPA) defines radon as the next most dangerous cause of lung cancer after smoking. Recent studies have shown that radon has a higher average radiation exposure for the general population than for medical activities such as total natural radiation or X-rays.

In the related art, Patent Document 1 discloses a passive sub-slab depressurization (PSD) radon discharge device and an active sub-slab depressurization (ASD) radon discharge device.

Figure 2a is a view of the prior art PSD radon discharging device, the exhaust pipe 50 is installed in the lower portion of the slab 15 of the building 10 to the outside of the radon accumulated in the soil 20 under the building 10 To be discharged. The slab (30) is placed on top of the soil (20) on which the building (10) is installed, and after installing the sealing polyethylene sheet (40) to block the inflow of radon's interior space (14), the slab ( 15), and the exhaust pipe 50 for ventilation between the gravel layer 30 and the polyethylene sheet 40 passes through the wall 11, roof 12 or ceiling 13 of the building 10 to the outside. By being installed in the furnace, radon flowing from the soil moves in the gravel layer 30 having a large flow space and is discharged to the outside through the exhaust pipe 50.

However, the above-described PSD radon discharge device discharges radon using the temperature difference inside the exhaust pipe, the air pressure difference between the interior space and the lower part of the building, so that the radon removal efficiency is low, which is not efficient.

FIG. 2B is a view illustrating an ASD radon discharge device, in which an exhaust pipe 50 is installed below the slab 15 of the building 10 and an exhaust fan 60 is installed in the exhaust pipe 50. The radon accumulated in the soil 20 is forcibly exhausted to the outside. The exhaust fan 60 allows a low pressure space to be formed between the slab 15 and the soil 20 through forced exhaust so that radon from the soil is moved to the low pressure space of the building floor through the gravel layer 30. Radon gas is exhausted to the outside through the exhaust pipe 50 connected to the roof 12 of the building.

However, the above-mentioned ASD radon discharge device is limited to the application of technology because it can be installed only in a newly constructed building, and it is difficult to secure a space for inhaling radon because it is buried in the soil. When the vibration occurs due to the operation of the suction fan or there is a problem that can be broken by the radon leak or soil collapse. In addition, foreign matters such as gravel or soil may be introduced together with radon to cause a failure of an apparatus such as an exhaust fan, and it may be difficult to combine and separate, and thus may not be moved and reinstalled.

Republic of Korea Patent Publication No. 10-1245143 (published March 19, 2013)

The present invention has been devised to solve all the above problems, by having a structure capable of collecting radon gas generated in the soil during the construction of the base of the building, it is possible to block the radon gas as much as possible, the radon gas is collected The purpose of the present invention is to provide a building floor foundation construction method for blocking and removing radon gas, which can prevent radon gas from entering the room by removing the gas into the atmosphere.

The present invention in order to solve the above problems are the excavation step to excavate the ground; A vinyl installation step of installing vinyl for moisture proof on the surface of the excavation space formed by digging; Discarding concrete casting step of pouring concrete on the upper vinyl; Insulation installation step of installing the insulation on the upper side of the discarded concrete; Gravel spraying step of protecting the insulation and collecting radon gas generated in the soil into the space between the gravel or sand particles by forming a gravel layer by spraying gravel or gravel and sand together on the upper side of the insulation; A collecting mat installed in the gravel layer, and a collecting mat installation step in which radon gas generated in the soil is collected in the collecting mat and moved to the collecting pipe; A collecting pipe installation step at a side of the collecting mat to install a collecting pipe connected to an exhaust pipe having a suction fan installed thereon to discharge the collected radon gas into the atmosphere; And it provides a floor-based construction method for blocking and removing radon gas comprising a finishing material construction step of spraying the finishing material on the upper side of the collecting mat.

In addition, the present invention excavates the ground to excavate the excavation step; Underground beam installation step of installing underground beams by placing concrete so that reinforcing bars are installed in the excavation space formed by digging; An earth filling step of filling the soil up to a certain height of the median beam; A vinyl installation step of installing vinyl for moisture proof on the filled soil; Discarding concrete casting step of pouring concrete on the upper vinyl; Insulation installation step of installing the insulation on the upper side of the discarded concrete; Gravel spraying step of protecting the insulation and collecting radon gas generated in the soil into the space between the gravel or sand particles by forming a gravel layer by spraying gravel or gravel and sand together on the upper side of the insulation; A collecting mat installed in the gravel layer, and a collecting mat installation step in which radon gas generated in the soil is collected in the collecting mat and moved to the collecting pipe; A collecting pipe installation step at a side of the collecting mat to install a collecting pipe connected to an exhaust pipe having a suction fan installed thereon to discharge the collected radon gas into the atmosphere; And it provides a floor-based construction method for the blocking and removal of radon gas comprising a finishing material construction step of spraying the finishing material on the upper side of the collecting mat.

According to the present invention, by providing a structure that can collect the radon gas generated in the soil during the construction of the base of the building, it is possible to block the radon gas as much as possible, the radon gas infiltrate is collected and discharged to the atmosphere to remove radon gas There is an effect that can be prevented from entering the room.

1 is an exemplary diagram illustrating an indoor inflow path of radon.
FIG. 2A is a diagram of a prior art passive sub-slab depressurization (PSD) radon discharging device, and FIG. 2B is a diagram of a prior art active sub-slab depressurization (ASD) radon discharging device.
3A and 3B are flowcharts of a building floor foundation construction method for blocking and removing radon gas according to an embodiment of the present invention.
Figure 4a is a construction picture to install underground beams to reinforce the reinforcement in the excavated excavation space and install the underground beam, Figure 4b is a photograph installed the insulation, Figure 4c is a photograph of spraying the finish.
Figure 5a is a photograph of the membrane sheet, Figure 5b is an exploded perspective view showing the configuration of the membrane sheet.
6A is a diagram illustrating a configuration of a sump according to an embodiment of the present invention, and FIG. 6B is a diagram illustrating a connection configuration and an operation of a sump according to an embodiment of the present invention.
7a to 7c is a photograph showing the configuration of the collecting mat according to an embodiment of the present invention, Figure 7d is a field construction photograph of the collecting mat.
8 is a state diagram used in the collection and removal of the radon gas in accordance with an embodiment of the present invention.

Hereinafter, with reference to the drawings will be described in detail with respect to the specific details for carrying out the building floor foundation construction method for the blocking and removal of radon gas according to the present invention.

Building floor-based construction method for the blocking and removal of radon gas according to the present invention can block the radon in the form of gas generated in the soil in the basement of the building, the radon gas is trapped and removed to remove the radon into the building interior In order to prevent the inflow, referring to Figure 3a in one embodiment, digging step (S10), vinyl installation step (S20), abandoned concrete pouring step (S30), insulation installation step (S40), gravel spraying step (S50), the collecting mat installation step (S60), collecting pipe installation step (S70) and finishing material construction step (S80) can be made.

The excavation step (S10) is to excavate the ground to be excavated to a suitable depth in proportion to the building area of the building for the construction of the building to form an excavation space.

In this case, referring to FIG. 3b, after performing the digging step S10 according to the scale of the building to be constructed, the underground beam installation step S11 and the soil filling step S12 may be performed as shown in FIG. 4A.

That is, the underground beam installation step (S11) is installed by installing the formwork for forming the underground beam in the excavation space formed by the trench when the trench is completed, reinforce the reinforcement, cast concrete, curing, install the underground beam To bear the bending moment, to support the load of the building, and to prevent the settlement of the foundation.

The soil filling step (S12) is to fill the soil excavated in the ground formed by the foundation and underground beams to a certain height. And, to cover the vinyl, such as PE film for moisture proof on the backfilling soil in the vinyl installation step (S20) to be described later.

The vinyl installation step (S20) is to install in one layer or multiple layers to install a vinyl, such as PE film for moisture proof, such as the bottom surface of the excavation space formed by breaking.

At this time, referring to Figures 5a and 5b before the vinyl installation step (S20), at least one sump (SUMP, 100) is installed on the bottom of the ground or soil, and the connection pipe 130 made of a material such as PVC It may further comprise a sump installation step (S13) for connecting with. For example, after partitioning the bottom of the ground or soil into several zones through the partition plate (P) and then install one or more sump 100 in each zone, the sump 100 is connected to the connecting pipe 130, soil ( Radon gas generated in S) is blocked by the upper membrane sheet 200 and at the same time, radon gas generated in the soil S is collected by the sump 100 and moved to the outside through an external tube (not shown). Emissions will be removed. At this time, the partition plate (P) is a through-hole (H) is formed so that the radon gas is easily moved between the areas can be easily collected by the adjacent sump.

 Referring to FIG. 5A, the sump 100 has an inlet 120 through which radon gas is introduced into the bottom of the body, and an inlet 120 or a connector formed with radon gas in various directions on the side of the body is provided with radon gas. 5b, a plurality of sumps are connected to the connection pipe 130 through the connector, and some sumps are connected to the outflow pipe 140 to generate radon gas generated in the soil. It is possible to further increase the removal efficiency of radon gas by primarily discharging to the atmosphere. At this time, the connection pipe 130 and the outlet pipe 140 may be installed inside the filter network to block foreign substances.

If the measured value of the radon gas in the soil after performing the vinyl installation step (S20) is more than 10,000 Bq / ㎥ or more can be carried out membrane membrane installation step (S21) for installing the membrane sheet 200 on the upper side of the vinyl. have. In this case, when installing the underground beam and backfilling the soil, it is preferable to increase the blocking rate of radon gas by installing the membrane sheet 200 to cover the bottom and side of the excavation space in a ┗┛ shape. In addition, the radon gas blocked by the membrane sheet may be collected by the sumps installed below and discharged to the outside air through an outer tube (not shown) connected to the sump.

6A and 6B, the membrane sheet 200 is formed of a multifilament yarn of low density polyethylene and blocks radon gas, and is formed of a multifilament yarn of low density polyethylene and is formed of a base layer 210. The upper layer 220 and the lower layer 230, and the upper layer 220 and the base layer 210 or the lower layer 230 attached to the upper and lower portions to block radon gas, protect the base layer 210, and provide abrasion resistance. It is interposed between the base material layer 210 and a lattice shape, and may be formed of four layers such as a grid layer 240 to provide high strength and tear resistance. Because radon tonggwayul (10 ^-9 m / s) of the membrane sheet 200 is 1 to 17, and radon moisture permeability (10 ^-12 m / s) is an excellent value range of from 0.5 to 7, the movement of La tonkatsu You can block quite a bit.

As described above, the membrane sheet 200 is composed of four layers, and basically has excellent resistance to radon gas, and thus has a high blocking rate for radon gas, but may also block other harmful gases generated in the ground such as methane gas, CO ₂ , and VOCs. It is excellent in blocking rate against moisture.

The discarded concrete pouring step (S30) is to cast the discarded concrete on the upper side of the vinyl or membrane sheet installed in the excavation space. The leveling concrete is a thin concrete before the foundation is laid to smooth the surface horizontally as a pretreatment under the foundation, underground beams, earthen concrete, etc., so that formwork or food lines can be installed, Prevents the paste component of the structural concrete from entering the ground.

The insulation installation step (S40) is to block the heat of the floor and the room by installing insulation such as styrofoam on the upper side of the discarded concrete as shown in Figure 4b. At this time, the heat insulating material is preferably installed in a thickness of 10 to 25 cm.

The gravel spraying step (S50) by spraying the gravel or gravel and sand together on the upper side of the insulation to form a gravel layer containing gravel, to protect the insulation and the radon gas generated in the soil to the space between the gravel or sand particles It is to move or collect. At this time, the thickness of the gravel layer is preferably a thickness of 3 to 5cm. The gravel layer is preferably made of gravel with a lot of interspace, but depending on the construction conditions can be sprayed with the gravel and sand together. The space between the gravel or sand particles provides a space for the radon gas to move or be collected, so that radon gas generated and penetrated in the soil may be collected and moved into the space between the gravel or sand particles.

The collecting mat installation step (S60) is to install the collecting mat 300 in the gravel layer to collect the radon gas passing through the gravel layer, to guide the collected radon gas to the collecting pipe 400. At this time, the collecting mat 300 is preferably installed along the edge of the gravel layer, the radon gas generated in the soil is collected and moved to the collecting mat 300 installed in the edge portion easily through the collecting pipe 400 to the outside Can be removed.

Referring to FIGS. 7A to 7D, the collecting mat 300 is formed of a mat plate 310 having a lateral cross section in a wavy pattern, and an outer sheet 320 surrounding and protecting the outside of the mat plate 310. At this time, the mat plate 310 is formed as a plurality of protrusions 311 and the groove 312 are alternately formed in the upper and lower, like the egg plate, the grooves 312 are in communication with each other, generated in the soil or gravel layer Passed radon gas is guided along the grooves 312 communicated with each other between the protrusions 311 of the collecting mat 300 by suction of the suction fan 510 is moved to the collecting pipe.

The collecting pipe installation step (S70) is installed on the side of the collecting mat, one to a plurality of collecting pipe 400, the collection pipe 400 is installed inside the filter to block the inflow of foreign matter such as soil or gravel It may be connected to the exhaust pipe 500, the exhaust pipe 500 is in communication with the atmosphere exposed to the ground or outside the building, the exhaust pipe 500 is installed with a suction fan 510, collected by the collecting mat 300 Radon gas is moved to the collection pipe 400 is discharged to the atmosphere by the suction force of the suction fan 510.

The finishing material construction step (S80) is to finish by laying a finishing material such as sand and cement on the upper side of the collecting mat 300, as shown in Figure 4c, the finishing material is poured into a thickness of 10 to 25 cm, the building structure on the upper side of the finishing material Concrete will be poured.

As described above, when the construction is completed as shown in FIG. 8, it is possible to prevent radon gas generated in the soil from being blocked by the construction structure 1 of the building floor foundation described above, and to be removed to the outside to be introduced into the building interior.

As a result, the building floor foundation construction method for blocking and removing radon gas according to the present invention is provided with a structure capable of collecting radon gas generated in the soil during the construction of the building ground foundation, so that radon gas can be blocked as much as possible. One radon gas is collected and then discharged to the atmosphere to prevent radon gas from entering the room.

In the present invention, the above embodiment is only one example, and the present invention is not limited thereto. Anything that has substantially the same configuration as the technical idea described in the claims of the present invention and achieves the same working effects is included in the technical scope of the present invention.

* Prior art
10. Building 11.Wall Panel
12. Roof 13. Ceiling
14. Indoor space 15. Slab
20. Soil 30. Gravel
40. Polyethylene Sheet 50. Exhaust Pipe
60. Exhaust Fan
* Present invention
1. Construction structure of the present invention
100.Sump 110.Body
120. Inlet 130. Connector
140. Outflow pipe 200. Membrane sheet
210. Base layer 220. Top layer
230. Bottom Layer 240. Grid Layer
300. Mat for collecting 310. Mat board
311.Thinches 312.Holes
320. Outer sheet 400. Collector
500. Exhaust Pipe 510. Suction Fan
H. Through P. Partition
S. Soil

Claims (8)

In the method of constructing the foundation of the building floor to block and remove the radon gas generated in the soil in order to block the inflow of radon gas into the building when the radon measurement value in the soil is measured above the reference value,
In the method of constructing a new floor structure after removing the floor structure of the existing building,
A digging step of digging and digging the ground;
A vinyl installation step of installing one or more layers of polyethylene vinyl on the surface of the excavation space formed by digging;
The membrane sheet is installed on the vinyl side, wherein the membrane sheet is formed of a multifilament yarn of low density polyethylene to block radon gas, and is formed of a multifilament yarn of low density polyethylene and attached to the upper and lower portions of the substrate layer, respectively, to radon gas. A membrane formed of a grid layer interposed between an upper layer and a lower layer, and between the upper layer and the substrate layer or the lower layer and the substrate layer to provide high strength and tear resistance. Seat installation step;
Discarding concrete casting step of pouring concrete on the membrane sheet;
Insulation installation step of installing the insulation on the upper side of the discarded concrete;
Gravel spraying step of protecting the insulation and collecting radon gas generated in the soil into the space between the gravel or sand particles by forming a gravel layer by spraying gravel or gravel and sand together on the upper side of the insulation;
The collecting mat is installed along the edge of the gravel layer so that the radon gas generated in the soil is collected in the collecting mat and moved to the collecting pipe. The collecting mat has a lateral cross-section and a plurality of protrusions at the top and bottom. A mat plate formed of alternating grooves, and an outer sheet surrounding the mat plate;
A collecting pipe installation step at a side of the collecting mat to install a collecting pipe connected to an exhaust pipe having a suction fan installed thereon to discharge the collected radon gas into the atmosphere; And
A method of floor-based construction for blocking and removing radon gas comprising a finishing material construction step of spraying a finishing material on an upper side of a collecting mat.
In the method of constructing the foundation of the building floor to block and remove the radon gas generated in the soil in order to block the inflow of radon gas into the building when the radon measurement value in the soil is measured above the reference value,
A digging step of digging and digging the ground;
Underground beam installation step of installing underground beams by placing concrete so that reinforcing bars are installed in the excavation space formed by digging;
An earth filling step of filling the soil up to a certain height of the median beam;
A vinyl installation step of installing one or more layers of polyethylene vinyl on the filled soil;
The membrane sheet is installed on the vinyl side, wherein the membrane sheet is formed of a multifilament yarn of low density polyethylene to block radon gas, and is formed of a multifilament yarn of low density polyethylene and attached to the upper and lower portions of the substrate layer, respectively, to radon gas. A membrane formed of a grid layer interposed between an upper layer and a lower layer, and between the upper layer and the substrate layer or the lower layer and the substrate layer to provide high strength and tear resistance. Seat installation step;
Discarding concrete casting step of pouring concrete on the upper vinyl;
Insulation installation step of installing the insulation on the upper side of the discarded concrete;
Gravel spraying step of protecting the insulation and collecting radon gas generated in the soil into the space between the gravel or sand particles by forming a gravel layer by spraying gravel or gravel and sand together on the upper side of the insulation;
The collecting mat is installed along the edge of the gravel layer so that the radon gas generated in the soil is collected in the collecting mat and moved to the collecting pipe. The collecting mat has a lateral cross-section and a plurality of protrusions at the top and bottom. A mat plate formed of alternating grooves, and an outer sheet surrounding the mat plate;
A collecting pipe installation step at a side of the collecting mat to install a collecting pipe connected to an exhaust pipe having a suction fan installed thereon to discharge the collected radon gas into the atmosphere; And
A method of floor-based construction for the blocking and removal of radon gas, including a finish construction step of spraying a finish on the collecting mat.
The method according to claim 1 or 2,
Before performing the vinyl installation step, at least one sump (SUMP) is installed, if a plurality of sump (SUMP) is installed to be connected through a connecting pipe, the radon gas blocked by the membrane sheet is collected and discharged to the outside air Includes additional sump installation steps to ensure that
The sump installation step is divided into several zones through the partition plate formed through the ground or through the ground of the ground and then installed one or more sump in each zone and then connected the sump by a connecting pipe, radon gas generated in the soil A bottom-based construction method for blocking and removing radon gas, which is blocked by an upper membrane sheet and is collected by a sump and moved to be discharged out through an external pipe.
The method of claim 3, wherein
The sump is formed with an inlet through which radon gas is introduced into the bottom of the body, and an inlet or a connection port through which radon gas is introduced into various sides of the body is formed so that radon gas is introduced into or connected to a connector through the connector. , Some sump is connected to the outflow pipe to remove the radon gas generated in the soil to the atmosphere through the outer pipe to the radon gas interior structure block and construction method of the existing building for blocking the inflow.
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