KR20000006867A - Active natural dewatering structure and method to prevent accident by buoyancy - Google Patents

Abstract

PURPOSE: The active natural drain structure is provided to smoothly perform the drain of underground water of construction structure newly constructed at an inclined area. CONSTITUTION: The construction method of active natural drain structure has the steps of: establishing an exhaust pipe(14) by giving natural inclination to the height for enabling natural drain to the main drain pipe(15); increasing the construction height of water-collecting tank(13) to increase the storage water level of underground water flowed in through a perforated pipe(12); enabling the performance of natural drain by actively overcoming even though the area around of the construction structure is the area which is incapable of natural drainage or the area for increasing the construction expenses if possible.

Description

Active natural dewatering structure and method 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 that is constructed on a sloped terrain, and in particular, even if the natural drainage method is not applicable or applicable, construction cost due to drainage line excavation The present invention relates to an active natural drainage method for the prevention of buoyancy accidents in which the groundwater is smoothly drained by actively coping with excessively used terrain conditions.

In general, when the building structure is stretched, as shown in FIG. 1, the axial force (W) due to the weight of the building structure and the buoyancy force (V) to be flowed by the groundwater simultaneously act on the ground of the building structure, where The remaining force of the buoyancy force V, which is greater than the axial force W, acts as an anchor force P to prevent the building structure from being injured.

However, when constructing a large-scale building such as an apartment, underground parking is mandatory in recent years, and the underground parking lot of an apartment is located in a lower zone due to the trend of increasing occupants and the desire to secure green space. The buoyancy will be more affected.

As a method for coping with buoyancy, anchor method and drainage method are mainly used. The anchor method is a method for compressing the ground by using frictional force of the ground, and the drainage method is a method for lowering the groundwater level that causes buoyancy at its source. to be.

More specifically, the anchoring method is a friction anchor and acupressure anchor is mostly used bar, friction anchor is a method of filling the ground between the anchor and the anchor using the adhesive force, the anchor anchor is anchored under the anchor A method of forming a bulb by forming a sieve.

In addition, the drainage method is divided into a forced drainage method and a natural drainage method, as shown in Figure 2, the forced drainage method flows into the water collecting well (3) through the perforated pipe (2) buried in the lower part of the foundation (1) The ground water is pumped with a pump (6) to drain to the outside through the discharge pipe (4), the natural drainage method, as shown in Figure 3, the groundwater naturally through the discharge pipe (4) according to the slope of the terrain It is a method of draining the groundwater accumulated in the sump (3) by flowing to the bottom. Reference numeral 5 is a main drain pipe connected to the discharge pipe (4).

However, among the methods for preventing buoyancy as described above, the anchor method is expensive compared to the drainage method, there is a problem of all the risk factors and re-tension due to corrosion and stress reduction of the steel wire, the waterproofing of the anchor head / base surface There is a problem that the breakage of the pressed concrete and the finish is connected to the defect, and 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 the pumping work must be carried out permanently, so the tenant bears the maintenance cost, and the groundwater level is lowered. There is a defect that causes settlement of the surrounding ground.

In addition, the natural drainage method has the advantage of easy maintenance, but in order to carry out the natural drainage, construction costs such as the excavation of a separate ground and the design of a separate drainage line for connecting the drainage line to the adjacent stream or sewer pipe are required. There is a growing problem.

As mentioned above, in the current method for preventing buoyancy, the drainage method is advantageous in a condition where the ground is inclined, but the forced drainage method has to be permanently maintained, and the natural drainage method greatly increases the construction cost. There is a problem.

The main object of the present invention devised in view of such a problem is to realize a smooth drainage in the ground conditions in which the structure is inclined.

A secondary object of the present invention is to reduce the construction cost, and also to reduce the construction cost required by eliminating a separate maintenance cost and to shorten the air.

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

2 is an explanatory diagram of a forced drainage method;

3 is an explanatory diagram of a natural drainage method.

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

5 is an explanatory diagram of an active natural drainage structure and a method according to the present invention;

(Explanation of symbols for the main parts of the drawing)

11; Base 12; Merit

13; Catchment 14; discharge pipe

15; Main drain

The active natural drainage structure for preventing buoyancy accidents according to the present invention as described above is a drainage structure for constructing the installation position of the main drain pipe, which is a discharge line for discharging the groundwater of the building structure to the outside than the installation position of the perforated pipe into which the groundwater flows. The discharge pipe is installed at a position higher than the main drain pipe so that the ground water is naturally drained to the main drain pipe, and the water collecting well is constructed such that the water level of the ground water introduced through the oil pipe can be discharged to the discharge pipe. .

Here, the discharge pipe is preferably installed at a position below the safety level so that the building structure is not injured by the positive pressure by the groundwater.

In addition, the active natural drainage method for preventing buoyancy accidents according to the present invention by placing the installation position of the main drain pipe, which is a discharge line to the ground water discharged to the outside than the installation position of the ground pipe inflowing ground water in the state close to the ground Constructing a drainage system; Constructing a collecting well for temporarily storing the drainage pipe to be drained to the main drain pipe through a discharge pipe through which the groundwater flowing from the oil hole comes; And a discharge pipe connected to the main drain pipe, the discharge pipe for naturally draining the groundwater stored in the sump, higher than the main drain pipe, and constructed at a position lower than a stable water level at which the building structure is not injured by the positive pressure of the ground water. do.

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

Accompanying drawings Figure 4 is an example of the active natural drainage method according to the present invention, Figure 5 is an explanatory view of the active natural drainage structure and method according to the present invention.

As shown in this, 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, in the process of building the building structure in a multi-step on the terrain forming a predetermined slope can be divided into the building structure (A) that can be natural drainage and the building structure (B) that is not natural drainage. .

Here, the present invention is a drainage method applied to the building structure (B) that is not natural drainage and the natural drainage is possible, but the construction drain (A) that takes too much construction cost because the depth of the main drain pipe is deep, will be described with reference to FIG. .

In the lower part of the foundation 11 of the building structure, there is a perforated pipe 12, which is a passage through which groundwater flows, and a collecting well 13 for temporarily storing ground water by connecting the perforated pipe 12 is provided on one side of the foundation 11. It is. In addition, the sump 13 is provided with a discharge pipe 14 for discharging the temporarily stored ground water to the main drain pipe 15 which is a ground water discharge line to discharge to the outside.

However, in the natural drainage method, in order to position the main drainage pipe 5 at a lower position than the discharge pipe 4, it is necessary to perform the excavation to a considerable depth from the ground, so that the construction cost is significantly increased and the air is also delayed. Also, in area A, where natural drainage is impossible, the main drainage pipe is installed higher than the oil pipe, so it is impossible to connect with the main drainage pipe.

Therefore, in the present invention, the main drain pipe 15 to be installed in the position as close to the ground as possible, and the discharge pipe 14 connected to the main drain pipe 15 to be installed at a position higher than the main drain pipe 15.

In addition, the construction height (L1) of the sump (13) is also higher than the installation position (L2) of the discharge pipe 14 so that the storage level of the sump (13) in which the discharge pipe 14 is installed is set higher than the discharge pipe (14). Install it. At this time, the installation position of the discharge pipe 14 should be installed so that the water level below the stable water level (L3), which is an area where the foundation of the building structure is not floated by the positive pressure of the ground water.

The active natural drainage structure and method according to the present invention configured as described above provides a natural gradient to the main drainage pipe 15 to the natural drainage as high as possible, and installs the discharge pipe 14, and stores the groundwater flowing through the perforated pipe 12. By increasing the construction height of the sump 13 to increase the water level, it is possible to implement natural drainage by actively overcoming even if the terrain around the building structure is impossible for natural drainage, or even if the terrain has an increased construction cost. I did it.

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

As described above, the active natural drainage structure and method for preventing buoyancy accidents according to the present invention can be natural drainage by actively giving a natural gradient even in the region or impossible terrain where the existing natural drainage method is possible, shorten the drainage line As a result, the overall construction cost, such as the reduction of the drainage cost of the drainage line, can be significantly reduced, and the construction period can be shortened.

In addition, maintenance costs, such as the forced drainage method, are excluded, reducing the burden on occupants, and improving the external reliability as well as the economic aspect compared to the anchor method, which requires a huge cost for construction and after-sales management. It is a very advantageous method in this respect.

Claims (3)

In the drainage structure in which the installation position of the main drain pipe, which is a discharge line for discharging the groundwater of the building structure to the outside, is installed higher than the installation position of the perforated pipe where the groundwater flows in, Active nature for the prevention of buoyancy accidents including a discharge pipe is installed at a position higher than the main drain pipe so that the ground water is naturally drained to the main drain pipe, and the sump of the ground water flowed through the oil pipe is discharged to the discharge pipe Drainage structure. The method of claim 1, The discharge pipe is an active natural drainage structure for preventing buoyancy accidents are installed at a position below the safety level in which the building structure is not injured by positive pressure by the groundwater. Constructing the installation position of the main drainage pipe, which is a discharge line through which groundwater is discharged to the outside, to install the groundwater in a state close to the ground; Constructing a collecting well for temporarily storing the drainage pipe to be drained to the main drain pipe through a discharge pipe through which the groundwater flowing from the oil hole comes; And a discharge pipe connected to the main drain pipe, the discharge pipe for naturally draining the groundwater stored in the sump, higher than the main drain pipe, and constructed at a position lower than a stable water level at which the building structure is not injured by the positive pressure of the ground water. Active natural drainage method to prevent buoyancy accidents.