KR100461920B1 - Dewatering Structure and Method Having Active Natural Dewatering Structure to Prevent Accident by Buoyancy - Google Patents

Abstract

The present invention relates to an active natural drainage structure and method for preventing buoyancy accidents. The present invention is a drainage structure in which the main drain pipe for discharging the groundwater of the building structure to the outside is constructed at a position higher than the hole pipe in which the groundwater flows, the water collecting well for collecting ground water flowing through the hole pipe, and the water collecting well and the main pipe And a discharge pipe connecting the discharge pipe, wherein the discharge pipe includes: an active natural drainage structure installed at a position higher than the main drain pipe so that the groundwater introduced into the sump through the oil pipe is naturally drained to the main drain pipe; Active nature, including a sump, an auxiliary sump that stores groundwater drained from the sump, a discharge pipe that allows the groundwater of the sump to naturally drain to the auxiliary sump, and a pump to discharge groundwater from the sump to the outside. A drainage structure having a drainage structure is provided. The discharge pipe is installed at a position below the stable level where the building structure does not float due to the positive pressure caused by the groundwater.

In addition, the present invention comprises the steps of constructing a ground pipe into which groundwater flows, and constructing a main drain pipe through which groundwater is discharged to a position higher than the installation position of the ground pipe, and a water collecting well collecting ground water flowing from the ground pipe. Constructing step; Active natural including connecting the main drain pipe and the sump to the discharge pipe for natural drainage of the groundwater stored in the sump at a position higher than the main drain pipe and lower than the stable level where the building structure is not injured by the positive pressure of the ground water. Drainage method; Constructing the perforated pipe, constructing the catchment well, constructing the auxiliary catch well, constructing the discharge pipe that naturally drains the groundwater of the catch well to the auxiliary catch well, and groundwater of the auxiliary catch well It provides a drainage method comprising the step of constructing a pump to discharge the furnace.

According to this, the groundwater can be actively drained naturally and the drainage line can be shortened even in areas where the existing natural drainage method is available as well as in the impossible area, thereby significantly reducing the construction cost, such as reducing the drainage cost of the drainage line. The construction period is shortened. In addition, even in a region where a conventional natural drainage structure / method or an active natural drainage structure / method cannot be used, a drainage structure can be installed at a low construction cost without fear of ground subsidence caused by a forced drainage method.

Description

Dewatering Structure and Method Having Active Natural Dewatering Structure to Prevent Accident by Buoyancy

The present invention relates to a natural drainage method for preventing buoyancy acting by the lower groundwater of a building structure, in particular, a building structure that is stretched on sloped terrain, and in particular, even if the conventional natural drainage method is not applicable or applicable The present invention relates to an active natural drainage structure and a construction method that actively cope with terrain conditions where excessive construction cost due to the excavation of the line is excessively used, so that smooth groundwater is drained.

As shown in FIG. 1, the axial force W due to the weight of the building structure and the buoyancy force V due to the groundwater act simultaneously on the building structure. Here, the anchor force (P) is applied to the remaining force of the buoyancy (V) by the groundwater acting more than the axial force (W) to prevent the building structure from rising.

However, when constructing a large-scale building such as an apartment, the underground parking lot is required by law, and underground parking lot of the apartment is located lower due to the increasing number of vehicles and the desire of the residents to secure green space. The buoyancy caused by

Anchor method and drainage method are mainly used to cope with such buoyancy. The anchor method is a method that uses the frictional force of the ground by compressing the ground, and the drainage method is a method of lowering the underground water level, which causes the buoyancy, at its source.

In more detail, the anchoring method is mainly used friction type anchor and acupressure anchor. Friction anchor is a method of filling the ground and the anchor with a mortar to use the adhesive force, the anchor anchor is a method of forming the bulb by forming an anchor body in the lower part of the anchor.

Drainage method is divided into forced drainage method and natural drainage method. In the forced drainage method, as shown in FIG. 2, the groundwater flowing into the sump well 3 through the perforated pipe 2 embedded in the lower part of the foundation 1 of the building structure is pumped to the discharge pump by pumping the ground water. (4) is a method of draining to the outside. The natural drainage method is a method of draining the groundwater accumulated in the sump (3) by allowing the groundwater to naturally flow down through the discharge pipe (4) according to the slope of the terrain as shown in FIG. Reference numeral 5 is a main drain pipe connected to the discharge pipe (4).

However, in the above-described conventional method for preventing the injury of the building by buoyancy, the anchor construction method is expensive compared to the drainage construction method, there is a problem of all risk factors and re-tension due to the corrosion and stress reduction of steel wire, anchor body There is a problem that the breakage of the pressed concrete and the finish is connected to the waterproof fault of the head / base surface, the thickness of the foundation is thick, there is a problem that the cost is increased.

In addition, the forced drainage method of the drainage method is suitable for the ground with a small amount of groundwater inflow, and the initial investment cost is low, but there is a disadvantage that the tenant bears the maintenance cost because the pumping work must be carried out permanently, because the groundwater level is lowered There is a defect that causes settlement of the surrounding ground.

The natural drainage method has the advantage of easy maintenance, but in order to perform the natural drainage, it is necessary to connect the drainage line to the adjacent stream or sewage pipe, so it is necessary to excavate a separate ground and install a separate drainage line. There is a problem that the construction cost increases.

As described above, in the conventional method for preventing the injury of building structures by buoyancy, the drainage method is advantageous, especially in a condition in which the ground is inclined, but the forced drainage method has a disadvantage in that permanent maintenance should be performed. Natural drainage method has a problem that the construction cost is increased.

The present invention devised to solve such a problem is that even if the natural drainage method is not applicable or applicable, it is possible to smoothly drain the groundwater by actively coping with the terrain conditions that require excessive construction cost due to the excavation of the drainage line. The purpose is to provide an active natural drainage structure and construction method to prevent buoyancy accidents.

It is still another object of the present invention to provide a drainage structure and a construction method in which construction cost is low and installation air is shortened.

1 is a conceptual diagram of buoyancy acting on a building structure.

2 is an explanatory diagram of a conventional forced drainage method.

3 is an explanatory diagram of a conventional natural drainage method.

Figure 4 is an example of the active natural drainage method according to the present invention is applied.

5 is a structural diagram of an active natural drainage structure according to the present invention.

6 is a structural diagram of a drainage structure having an active natural drainage structure according to the present invention;

<Explanation of symbols for the main parts of the drawings>

11: foundation

12: Merit Hall

13: water catch

14: discharge pipe

15: main drain pipe

16: secondary sump

The active natural drainage structure of the present invention is a drainage structure in which the main drain pipe for discharging the groundwater of the building structure to the outside is constructed at a position higher than the hole pipe in which the groundwater flows, and includes a water collecting well for collecting ground water introduced through the hole pipe; It includes a discharge pipe connecting the sump and the main drain pipe, characterized in that the discharge pipe is installed at a position higher than the main drain pipe so that the groundwater introduced into the sump through the perforated pipe is naturally drained to the main drain pipe.

In addition, the drainage structure having an active natural drainage structure of the present invention, a catchment for storing the groundwater introduced through the perforated pipe, an auxiliary sump for storing the groundwater drained from the sump, and the sump and the auxiliary sump It is characterized in that it comprises a discharge pipe for connecting the groundwater stored in the sump well to the secondary sump to drain naturally, and a pump for discharging the groundwater collected in the auxiliary sump to the outside.

Here, the discharge pipe is preferably installed at a position below a stable level where the building structure does not float due to the positive pressure by the groundwater.

In addition, the active natural drainage method of the present invention, the step of constructing the ground pipe inflowing groundwater, the step of constructing the main drain pipe discharged to the outside at a position higher than the installation position of the ground pipe, groundwater flowing from the ground pipe Constructing a water collecting well to collect; Connecting the main drain pipe and the sump to construct a discharge pipe for naturally draining the groundwater stored in the sump at a position higher than the main drain and lower than a stable level at which the building structure is not injured by positive pressure of the ground water. It is done.

In addition, the drainage method of the present invention, the step of constructing the groundwater pipe inflowing groundwater, the construction of a water collecting well for storing the groundwater flowing from the oil hole pipe, the step of constructing an auxiliary water collecting well, the water collecting well and the auxiliary house Constructing a discharge pipe for natural drainage of the groundwater stored in the sump to the secondary sump by connecting the crystal, and constructing a pump for discharging the groundwater collected in the auxiliary sump to the outside.

Hereinafter, preferred embodiments of the present invention described above will be described in more detail with reference to the accompanying drawings.

Figure 4 is an example of the active natural drainage method according to the present invention, Figure 5 is a structural diagram of the active natural drainage structure according to an embodiment of the present invention.

As shown in Figure 4, the active natural drainage method for preventing buoyancy accidents according to the present invention can be used in combination with the general natural drainage method. That is, as shown in Figure 4, the area for building and constructing the building structure in multiple stages on the terrain forming a predetermined slope can be divided into the area (A) that can be natural drainage and the area (B) where it is impossible to drain.

The active natural drainage structure of FIG. 5 is suitable for the area B where natural drainage is impossible and for the area A where natural drainage is possible but the main drainage pipe is deep and the construction cost is excessively consumed.

According to this, the lower part of the foundation 11 of the building structure is embedded with a hole (12) which is a passage through which groundwater flows, and the collecting well (13) in which the ground pipe 12 is connected to temporarily store groundwater is It is provided on one side. In addition, an upper portion of the sump 13 is provided with a discharge pipe 14 connected to the main drain pipe 15 to discharge groundwater temporarily stored outside. The construction height L1 of the sump 13 is higher than the installation position L2 of the discharge pipe 14, and the installation position of the discharge pipe 14 is an area where the foundation of the building structure does not rise due to the positive pressure of the groundwater. It is provided so that it may become the water level below phosphorus stable water level L3. In addition, the main drain pipe 15 is lower than the installation position (L2) of the discharge pipe 14, but is installed higher than the bottom height of the sump (13).

In the conventional natural drainage method, as shown in Fig. 3, the main drain pipe 5 is located at a lower position than the discharge pipe 4 located at the bottom of the sump, sometimes at a position lower than the bottom height of the sump 13. In order to ensure that the ground to be carried out to a considerable depth from the ground construction cost is significantly increased, there is a problem that the air is also delayed. In addition, in the region (B) where natural drainage is not shown in FIG. 4, since the main drain pipe is installed higher than the oil hole, natural drainage to the main drain pipe is impossible, and thus forced drainage is required.

However, in the present invention, the main drain pipe 15 is installed in a position close to the ground, and the discharge pipe 14 connected to the main drain pipe 15 is provided on the top of the sump 13 to be higher than the main drain pipe 15. Install in place. Therefore, in the area A where natural drainage is possible, by constructing the main drain pipe 15 near the ground, it is easy to excavate the work and can save the construction cost. In addition, since the height of the discharge pipe 14 can be installed at a position higher than the main drain pipe 15 even in the region B where natural drainage is impossible, natural drainage is possible.

Therefore, the groundwater flowing through the oil pipe 12 is stored below the stable water level in the sump 13 to be drained to the main drain pipe 15 from time to time through the discharge pipe 14 to prevent buoyancy accidents caused by groundwater.

Figure 6 illustrates a drainage structure having an active natural drainage structure, according to another embodiment of the present invention. According to this, the auxiliary sump 16 is provided on the side of the sump 13. The upper part of the sump 13 and the auxiliary sump 16 are connected to the discharge pipe 14a. As a result, the groundwater stored in the sump 13 is naturally drained to the auxiliary sump 16 through the discharge pipe 14a. Groundwater collected in the auxiliary sump 16 is pumped and drained out. This drainage structure is a region where the main drainage pipe 15 is above the inlet of the drainage pipe 14a, so that neither the conventional natural drainage method nor the active natural drainage method of the present invention shown in FIG. 5 can be used, or the surrounding ground is flat. Therefore, even if it is possible to apply the conventional natural drainage method or the active natural drainage method of the present invention is suitable for the region where the backflow of groundwater through the discharge pipe during the rainy season is concerned.

In the above-described case, even though the conventional forced drainage method is used, the groundwater level around the building structure is lowered to the depth of the foundation 1 of the building structure by forcibly draining the groundwater stored in the sump 3 as shown in FIG. 2. There is a problem that the ground around the structure is settled. In order to prevent ground subsidence, a positive pressure countermeasure method (such as a lock anchor and a weight increase method) should be applied, thus increasing the construction cost.

According to the active natural drainage structure of the present invention shown in Figure 6, the groundwater flowing into the sump (13) is stored up to the inlet height of the discharge pipe (14a) located above the sump (13) to raise the level of the surrounding ground water Therefore, the surrounding ground is stabilized by significantly reducing the settlement of the ground. In addition, as the total head of the bottom of the foundation is increased, the amount of infiltration is reduced, and the construction cost is significantly reduced compared to the positive pressure countermeasure method for preventing settlement.

According to the present invention, the groundwater can be actively drained naturally in areas where the existing natural drainage method is possible as well as in an impossible region. In addition, according to the present invention, the sump can be connected to the main drain pipe irrespective of the height of the main drain pipe so that the drain line can be shortened. Therefore, the construction cost is significantly reduced as well as the cost of the drainage of the drainage line is reduced, and the construction period is also shortened. In addition, maintenance costs as in the forced drainage method are excluded, and economical advantages as well as reliability can be improved as compared to the anchor method which requires a huge cost for construction and after-care.

In addition, according to the embodiment shown in FIG. 6, even in a region where the conventional natural drainage structure / method or the active natural drainage structure / method of FIG. 5 cannot be used, it is possible to obtain a low construction cost without fear of ground subsidence by the forced drainage method. Drainage structures can be installed.

Claims (8)

In the drainage structure in which the main drain pipe for discharging the groundwater of the building structure to the outside is constructed at a position higher than the perforated pipe that the groundwater flows in, A collecting well for collecting groundwater flowing through the oil hole and a discharge pipe connecting the collecting well and the main drainage pipe, The discharge pipe is higher than the main drain pipe so that the ground water introduced into the sump through the oil pipe is naturally drained to the main drain pipe, and the buoyancy accident prevention is characterized in that it is installed below a stable level where the building structure is not injured by positive pressure by the ground water. Active natural drainage structure for delete Constructing perforated pipes through which groundwater flows; Constructing a main drain pipe for discharging the groundwater to a higher position than the installation position of the hole; Constructing a water collecting well for collecting groundwater flowing from the hole; Connecting the main drain pipe and the sump to construct a discharge pipe for naturally draining the groundwater stored in the sump at a position higher than the main drain and lower than a stable level at which the building structure is not injured by positive pressure of the groundwater. Active natural drainage method for preventing buoyancy accident, characterized in that. In the drainage structure in which the main drain pipe for discharging the groundwater of the building structure to the outside is constructed at a position higher than the perforated pipe that the groundwater flows in, A collecting well for storing the groundwater introduced through the hole; An auxiliary sump for storing groundwater drained from the sump; The sump is connected to the auxiliary sump to allow the groundwater stored in the sump to be naturally drained to the auxiliary sump, and is installed at a position below a stable level at which a building structure is not injured by a positive pressure caused by the groundwater. Discharge pipe, A drainage structure having an active natural drainage structure, characterized in that it comprises a pump for discharging the groundwater collected in the secondary sump to the outside. delete Constructing perforated pipes through which groundwater flows; Constructing a water collecting well for storing groundwater flowing from the perforated pipe; Constructing an auxiliary sump, Connecting the sump and the auxiliary sump to construct a discharge pipe for naturally draining the groundwater stored in the sump to the auxiliary sump at a position below a stable level such that the building structure is not injured by positive pressure by the groundwater; Wow, And constructing a pump for discharging the groundwater collected in the auxiliary sump to the outside. In the drainage structure in which the main drain pipe for discharging the groundwater of the building structure to the outside is constructed at a position higher than the perforated pipe that the groundwater flows in, A collecting well for collecting groundwater flowing through the oil hole and a discharge pipe connecting the collecting well and the main drainage pipe, The discharge pipe is a higher position than the main drain pipe so that the groundwater introduced into the sump through the oil pipe is naturally drained to the main drain pipe, and the buoyancy accident prevention is characterized in that it is installed at a stable level where the building structure is not injured by positive pressure by the ground water. Active natural drainage structure. In the drainage structure in which the main drain pipe for discharging the groundwater of the building structure to the outside is constructed at a position higher than the perforated pipe that the groundwater flows in, A collecting well for storing the groundwater introduced through the hole; An auxiliary sump for storing groundwater drained from the sump; A discharge pipe connected to the sump and the auxiliary sump to allow the groundwater stored in the sump to be naturally drained to the auxiliary sump, and a discharge pipe installed at a stable level such that the building structure is not injured by positive pressure by the groundwater; A drainage structure having an active natural drainage structure, characterized in that it comprises a pump for discharging the groundwater collected in the secondary sump to the outside.