KR100693807B1 - Trench drainage construction method to maintain proper water pressure - Google Patents

Abstract

The present invention relates to a drainage construction method for draining the groundwater around the lower part of the building and, more particularly, the groundwater penetrating from the lower part or side of the building is appropriately discharged through a collecting well, etc. The present invention relates to a method for constructing a drainage path where a balance between self-weight of a building and an action pressure of groundwater on the floor of a building can be balanced. The construction of the present invention, in the drainage construction method to prevent the high water pressure caused by the water head difference of the groundwater generated in the bottom of the underground building structure and to maintain the proper water pressure, the top surface itself after the excavation or the earth soil layer, gravel layer, the bag Horizontal stop working process to stop the gulting finish surface horizontally by using a layer or the like, a discharge path forming step of digging with a predetermined width and depth from the predetermined position of the gulting finish surface to the installation site of the gulting finish surface, the A drainage installation process for installing a sump well on one side, a drainage pipe installation process for placing and backfilling a discharge pipe connected to the sump well in the discharge path, and drainage for drainage function on the gulto finish surface after the horizontal stop work process Drainage installation process for installing the cast concrete, the mortar to the predetermined height on the gulto finish surface And a decompression work process for connecting the decompression structure so as to raise and lower the drain concrete path connected with the drainage material and the discharge pipe for discharging groundwater connected to the drain pipe and the discharge surface by a predetermined height. It is done.

The present invention in the construction of the drainage to prevent the up-water pressure of the groundwater, by configuring the drainage up and down to go up and down to have a certain head difference at a certain position of the drainage, so that the pressure is distributed evenly in a certain section While maintaining and regulating the constant upstream pressure on the bottom surface, it has the effect of preventing excessive groundwater discharge.

Description

Construction method of trench drainage to maintain proper water pressure {The construction method of basement drainage}

1 is a view showing a cross section of a conventional drainage construction.

2 is an enlarged view showing a cross section of a conventional drainage construction.

3 is a view for showing a drainage construction method of the present invention.

4 is a view showing a drainage structure according to the drainage construction method of the present invention.

5 is a view showing another drainage structure according to the drainage construction method of the present invention.

6 is a view showing another drainage structure according to the drainage construction method of the present invention.

7 is a view showing various forms of the drainage structure according to the drainage construction method of the present invention for preventing the siphon effect.

<Description of Symbols for Main Parts of Drawings>

1: gulto finish noodle 10: drainage

20: discarded concrete 30: sump

40: floor concrete concrete 42: wall

50: tube 52: upward extension road

54: Downward extension road 56: Upper accommodation space

58: hall

The present invention relates to a drainage construction method for draining the groundwater around the lower part of the building and, more particularly, the groundwater penetrating from the lower part or side of the building is appropriately discharged through a collecting well, etc. The present invention relates to a method for constructing a drainage path where a balance between self-weight of a building and an action pressure of groundwater on the floor of a building can be balanced.

In general, when a large amount of groundwater exists around and underneath the building, the building receives a buoyancy force due to the groundwater, which causes the building to rise and is destroyed, threatening safety. On the contrary, if the groundwater existing around and underneath the building is rapidly removed by forced drainage, the ground where the groundwater existed suddenly becomes empty and the ground sinks, which causes the building to fall and threaten its safety. .

Many methods are used through dead weight and permanent (buoyancy) anchors for the up-water pressure treatment acting on the foundation floor of the building, but this is the limitation that the continuous reliability of the buoyancy anchor's tensile force is not guaranteed in relation to the durability and safety of the building. There is. An improved method is to form an artificial catchment and drainage layer under the foundation floor so that the groundwater flowing into the site is collected in the catchment along the drainage path and pumped and discharged regularly so that the foundation floor concrete does not act as a positive pressure. Permanent drainage system method. This has the advantage of more stable and permanently solve the problem of up-water pressure in proportion to the high groundwater level compared to the conventional method.

This conventional general drainage system is shown in FIGS. 1 and 2. Referring to FIGS. 1 and 2, the drainage material (or formwork) 110 having a predetermined height is horizontally and / or vertically connected to each other at a predetermined interval and disposed horizontally on the gulto finish surface 101, but the rock layer While placing the nonwoven fabric (not shown) between the gulto finish surface 101 and the drainage 110 is installed so that the outlet of the drainage 110 gathered to one side is connected to the sump 130 and the mortar on a predetermined height It is a method of forming cast concrete 120 by pouring.

This conventional method is forced to drain through the sump 130, or directly connected to a separate discharge pipe (not shown) and in communication with the external main drain (not shown), so that it can be naturally drained by the upward pressure do. However, this drainage method has a problem that can not prevent ground subsidence due to excessive discharge.

Therefore, the groundwater discharge is prevented to prevent the upward pressure of the building, and at the same time, the excessive discharge is prevented, and the design ground water level, that is, the theoretical groundwater level is a balance between the force due to the pressure of the groundwater under the building. In order to be maintained, it is necessary to have a drainage system that collects groundwater that penetrates the bottom of the building through various intermediate methods until it reaches the design stability level, and discharges it only when it exceeds the design stability level. It became.

The present invention has been made to solve the above problems, the groundwater level of the bottom of the building does not exceed the design stable water level to avoid buoyancy acted by the groundwater threatens the safety of the building, and the groundwater is excessive It is an object of the present invention to provide a method for constructing a trench drainage structure for preventing forced drainage.

The construction of the present invention for achieving the above object is, in the drainage construction method for preventing the high up-water pressure caused by the water head difference of the groundwater generated in the bottom of the underground building structure and to maintain a proper water pressure, the upper surface after the excavation Horizontal stop working process to stop the oyster finish surface to be horizontal by using itself or the remaining soil layer, gravel layer, the barrier layer; A discharge path forming step of digging at a predetermined width and depth from a predetermined position of the gulting finish surface to a position at which a collecting well is installed; A collecting well installation step of installing a collecting well on one side of the gulto finish surface; A discharge pipe installation step of disposing and filling the non-porous discharge pipe connected to the sump well in the discharge path; A drainage installation process of installing drainage material for drainage function on the oyster toe finish surface which has undergone the horizontal stop working process; A cast concrete placing process of forming a cast concrete layer by pouring mortar to a predetermined height on the gulting finish surface; And a decompression work process connected to the drainage material and the discharge pipe to connect the decompression structure so that the drainage path for discharging the groundwater is raised and lowered by a predetermined height from the gulto finish surface.

The depressurizing work process includes a construction method for connecting a separate pipe to the drain material, and the depressurizing structure is characterized in that the drainage path is lowered after the pipe is raised by a predetermined height from the position of the drain material by the pipe.

The pipe has a concentric separation surface having a different diameter and is formed in a double pipe shape in which only the upper part is in communication. In the lower space separated by the separation surface, an inlet for connecting with the drainage and an outlet for connecting with the discharge pipe are formed. It is characterized by being.

The pipe has an upward extension path and a downward extension path, wherein the upper extension path and the downward extension path communicate with each other at an upper end thereof, and the lower space of the upper extension path has an inlet for connecting with the drainage material, and the downward extension path. The lower space of the furnace is characterized in that the outlet for connecting to the discharge pipe is formed.

The drainage material is characterized in that any one of the drain plate, drain board, drain mat, perforated pipe, non-perforated pipe, PE pipe, PVC pipe, geotextile, vinyl, bundle pipe, formwork.

The discharge pipe is characterized in that the air pipe.

All or part of the cross section of the descending portion of the tube is characterized in that the shape is wider than the cross-sectional area of the rising portion of the tube.

The upper portion of the rising portion of the tube is characterized in that the upper receiving space larger than the cross-sectional area of the rising portion is provided.

The upper end side of the tube is characterized in that the hole is formed.

Hereinafter, the configuration of the present invention will be described in detail with reference to embodiments of the present invention shown in the accompanying drawings.

3 is a view for showing a drainage construction method of the present invention. Referring to Figure 3, while having a certain height upward from the drainage material 10 on the gulting finish surface (1), the drainage path to the position higher than the discarded concrete 20 and the bottom concrete concrete 40 to rise and descend do. As a result, if the water head difference to the position where the upward water pressure of the groundwater flowing through the drain 10 rises below the water level, the water is not drained. This prevents a large amount of groundwater from being discharged even at the slight upward pressure.

The groundwater introduced into the drainage material 10 rises and descends by a predetermined height along the pipe 50 allowing the drainage path to rise upwards, and after falling, the discharged pipe buried at a position lower than the gulto finish surface 1 ( 60 is discharged to the sump (30).

The drainage material 10 is disposed on the gulting finish surface 1, and the discharge pipe 60 is disposed below the gulting finish surface 1. To this end, at the position between the pipe 50 and the sump 30, the gulto finish surface 1 is dug into a width and depth where the discharge pipe 60 can enter, and then a trench is formed, and then the discharge pipe 60 is disposed in the trench. After that, the upper side is covered with soil or discarded concrete 20, and backfilled. Between the drain 10 and the pipe 50, between the pipe 50 and the discharge pipe 60 is connected using a separate connector (not shown) or a socket (not shown).

The order of the arrangement of the drain 10, the formation of the trench, the arrangement of the discharge pipe 60, the installation of the sump 30 may be changed according to the site situation and conditions. After the drainage material 10 and the discharge pipe 60 are disposed, after the pipe 50 which is a decompression structure is connected, the discarded concrete 20 is poured, or the drainage material 10 and the socket or connector connected to the discharge pipe 60. It is also possible to pour the discarded concrete 20 first in the state withdrawn upwards, and then connect the pipe 50 with a socket and a connector.

Pipe 50, which is a decompression structure, may be installed in a plurality of basins by using a socket and a connector, and may be joined after connecting a separate extension drain to the socket and the connector so as to be easily installed. In addition, the pressure reduction structure is preferably installed in or near the wall or pillar due to the basement structure.

The drainage material 10 may be a space corresponding to a minute gap formed between the gulting finish surface 1 and the discarded concrete layer 20 through a vinyl, a nonwoven fabric (not shown), or a tube, formwork, panel, or the like. When cast concrete is cast using the cast concrete layer 20 may be formed, and drainage pipes, non-perforated pipes, bundle pipes, drain mats, drain boards, drain plates, PE pipes, PVC pipes, geotextiles, etc. It may also be formed while ensuring the space therein.

Drainage, connectors, pipes, etc., used as pressure-reducing structures, are to be raised and lowered and to be non-porous. That is, the internal groundwater should be sealed so that it does not discharge to the outside. If there is a hole or a hole communicating with the outside, groundwater may flow in the opposite direction. Therefore, drains, connectors, and pipes around the decompression position should all be made of non-perforated pipes. If they are not non-formed, they should be sealed in concrete to prevent communication with the outside, or be buried in a wall to discharge groundwater to the outside or inflow from the outside. It should not be possible.

In the depressurization work process, the drainage material 10 itself may be formed to have a predetermined height upward and downward, and the sump well 30 may be connected to a separate (inverted) U-shaped pipe 50 to the drainage material 10. It may be connected to the side, or a double cylindrical tube configured to raise the inner tube and lower the outer tube may be used.

4 is a view showing a drainage structure according to the drainage construction method of the present invention. Referring to FIG. 4, the drainage material 10 disposed on the gulting finish surface 1 is raised by a predetermined height upward through the discarded concrete 20 and the bottom concrete concrete 40, and then lowered again to give the gulting finish surface ( It extends from the bottom of 1) to the collecting well side. At this time, it is possible to raise and lower the drain 10 in the building wall 42 for the decompression, or to allow the pipe 50 for the decompression to be located in the building wall 42. In addition, a portion of the tube 50 is located in the building wall 42, and the remaining portion may be configured to be exposed to the outside of the wall 42.

5 is a view showing another drainage structure according to the drainage construction method of the present invention. Referring to FIG. 5, a configuration for decompression, for example, the pipe 50 may be located near the water collecting well 30 and may be discharged to the water collecting well 30 through the discharge pipe 60. Such a decompression structure may be appropriately installed in the required position according to hydraulic calculations.

6 is a view showing another drainage structure according to the drainage construction method of the present invention. Referring to FIG. 6, a drainage path to the sump may be formed separately from the drainage material 10, and the pipe 50 may be lowered again by a predetermined height above the discarded concrete 20 and the bottom concrete concrete 40. After descending, it extends to the sump well in the gulto finish surface (1). At this time, the drainage material 10 may be connected only to the pipe 50, but only one side of the drainage material 10 is opened toward the pipe 50, and the drainage material 10 may be continuously extended to be connected to the water collecting well. have.

In this case, the groundwater is discharged only to the drainage material 10 at an appropriate level of the upstream pressure, and when the upward pressure rises, the groundwater flows to the discharge pipe 60 through the pipe 50 together with the drainage 10 from a predetermined level.

7 is a view showing various forms of the drainage structure according to the drainage construction method of the present invention for preventing the siphon effect. Referring to FIG. 7, various shapes of tubes 50 are disclosed to prevent the siphon effect.

The present invention not only discharges groundwater to prevent excessive upward water pressure of groundwater, but also has an object of preventing ground subsidence due to excessive groundwater discharge. The non-porous tube 50 is a siphon phenomenon occurs by the groundwater flowing through the entire cross-sectional area.

That is, while the groundwater flowing initially falls, a low pressure and a vacuum state are formed internally, and the groundwater which was in the lower side is attracted and discharged. In this case, in spite of the above-mentioned hydraulic pressure holding means, groundwater at a lower position is also discharged.

In order to prevent such a siphon phenomenon, various shapes of hollow tubes are used. Referring to (a), the cross-sectional area of the downward extension path 54 is made larger than the cross-sectional area of the upward extension path 52. In this case, the groundwater flowing downwards does not fill all the cross-sections, and since the empty space is generated, the groundwater of the upper extension road 52 can be prevented from coming up.

Referring to (b), the upper accommodating space 56 is formed at the upper end between the upper extension path 52 and the lower extension path 54. The upper accommodating space 56 is a sealed volume of a predetermined volume and has a large cross-sectional area with the downward extension path 54 having a large cross-sectional area. Therefore, the groundwater rising along the upward extension path 52 flows down to the upper receiving space 56 without being siphoned into the downward extension path 52.

Referring to (c), it is possible to form a hole 58 on the upper side separately. Since the hole 58 supplies air into the non-empty tube 50, the hole 58 serves to prevent the low pressure and vacuum from occurring in the non-empty tube 50.

Referring to (d), it is possible to increase the cross-sectional area of the downward extension path 64 together with the hole 58 so as to act simultaneously with the function of the hole 58.

In addition, the hole 58 may be effectively used to clean the interior of the upper and lower extension furnace. It may be used to forcibly drain the water into the discharge pipe through the hole 58 to forcibly drain the sediment, accumulated and sediment in the discharge pipe toward the sump. In addition, the hole 58 may be opened or closed through a valve (not shown) according to a selection.

Hereinafter, the drainage operation of the drainage structure according to the present invention and the effect in each configuration will be described.

The groundwater accumulated in the basement of the building flows into the drainage due to the self-weight of the building and the upward water pressure due to the increase of the groundwater. Groundwater flowing through the drainage is pushed out in a constant direction by the upward hydraulic pressure, the process is stopped once reaching the pressure reducing pipe having a certain height upward. If the upstream water pressure of the groundwater continues to increase due to rainy weather or an increase in the number of rivers, the water level rises through the upward extension passage of the decompression tube, and if the pressure exceeds that, the groundwater overflowing from the decompression tube is discharged through the downward passage Flows into.

At this time, the groundwater beyond the decompression tube is relatively reduced in pressure, does not flow back in the reverse direction, flows toward the sump or the external drainage. In the drainage of groundwater with different permeability coefficients for each position, if the groundwater at a distance is collected without decompression, a very large cumulative pressure may be applied to the water collecting well end of the drainage at a position far from the catchment position. Intermediate control through the pipe solves this problem.

In the system and the structure of the present invention, since the pressure is reduced in accordance with the path for each watershed in advance, it is sent to the water collecting well side, such a problem does not occur. In addition, because the water pressure flows by basin is controlled, there is no need for a thick pipe or a plurality of main drainage pipes having various distribution paths in preparation for the inflow of high pressure groundwater, and it is not necessary to directly connect drainage materials in various areas to the sump. It will be able to accommodate the hydraulic pressure of the groundwater flowing into the minimum pipe.

The drainage channel constructed by the above-mentioned construction method can appropriately reduce the pressure applied to the drainage material or the pipe in the middle. As the height of the pipe is adjusted by hydraulic calculation, the groundwater can be discharged only when the proper water pressure is exceeded, and the groundwater passing through the pipe flows along the discharge pipe in the lower side of the gulto finish surface to the sump well side. This reduces excessive pressure on drains and pipes, as well as preventing the discharge of large amounts of groundwater at a slight upward pressure, and also prevents backflow of groundwater.

In the present invention in the construction of the drainage for preventing the up-water pressure of the groundwater, by configuring the drainage up and down to go up and down to have a certain head difference at a certain position of the drainage, so that the pressure is distributed evenly for each section It maintains and regulates the constant water pressure on the floor of the building at the same time, and has the effect of preventing excessive groundwater discharge.

In addition, the present invention by inhibiting the excessive groundwater discharge to reach a certain water pressure by the pressure reducing pipe to prevent ground subsidence, and has the effect of preventing the backflow of the discharged groundwater.

The present invention has an effect of preventing the excessive discharge of groundwater due to the siphon effect by preventing the cross-sectional area of the pipe to be different from each other, or to form a separate hole in the pipe, to prevent the low pressure or vacuum in the pipe.

Claims (9)

In the drainage construction method to prevent the high up water pressure caused by the water head difference of the ground water generated in the bottom of the underground building structure and to maintain the proper water pressure, A horizontal stop working step of stopping the gulto finish surface horizontally by using the upper surface itself after the gulting or the remaining soil layer, the gravel layer, the buffing layer, etc .; A discharge path forming step of digging at a predetermined width and depth from a predetermined position of the gulting finish surface to a position at which a collecting well is installed; A collecting well installation step of installing a collecting well on one side of the gulto finish surface; A discharge pipe installation step of disposing and filling the non-porous discharge pipe connected to the sump well in the discharge path; A drainage installing step of installing drainage for drainage function on the gulto finish surface after the horizontal stop working process; A cast concrete placing process of forming a cast concrete layer by pouring mortar to a predetermined height on the gulting finish surface; And A trench for maintaining a suitable hydraulic pressure, comprising a depressurizing work process for connecting a depressurizing structure such that a drainage passage connected with the drainage material and the discharge pipe for discharging groundwater is raised and lowered by a predetermined height from the gulting finish surface. Type drainage construction method. The process of claim 1 wherein the depressurization process is: Including a construction method for connecting a separate pipe to the drain, The decompression structure is a trench-type drainage construction method for maintaining a suitable hydraulic pressure, characterized in that the drainage is raised by a predetermined height from the position of the drainage by the pipe is lowered. The tube of claim 2 wherein the tube is: The concentric dividing surface with different diameters is formed, and only the upper part is in communication with the double tube shape. A trench drainage construction method for maintaining proper hydraulic pressure, characterized in that the lower space separated by the partition surface is formed with an inlet for connecting to the drain and the outlet for connecting to the discharge pipe. The tube of claim 2 wherein the tube is: Equipped with upward extension path and downward extension path, The upper extension part and the lower extension part is in communication with the upper part, The lower space of the upper extension road inlet for connecting with the drainage, and the lower space of the lower extension road is formed in the trench type drainage for maintaining a proper hydraulic pressure, characterized in that the outlet for connecting to the discharge pipe is formed. The method of claim 1, wherein the drainage material is: Drain board, drain board, drain mat, perforated pipe, non-perforated pipe, PE pipe, PVC pipe, geotextile, vinyl, bundle pipe, formwork any one of the trench type drainage construction method for maintaining the proper pressure. The method of claim 1, wherein the discharge pipe is a non-pipe, trench type drainage construction method for maintaining a suitable pressure. The method according to claim 3 or 4, All or a partial cross-sectional area of the descending portion of the tube is wider than the cross-sectional area of the rising portion of the tube trench type drainage construction method for maintaining the proper pressure. The method according to claim 3 or 4, Trench-type drainage construction method for maintaining the proper pressure, characterized in that the upper end of the rising portion of the tube is provided with an upper receiving space larger than the pipe cross-sectional area of the rising portion. The method according to claim 3 or 4, Trench-type drainage construction method for maintaining the proper pressure, characterized in that the hole is formed on the upper end side of the pipe.

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