KR101612521B1

KR101612521B1 - Method for constructing underground structures restraining transformation and using external wall

Info

Publication number: KR101612521B1
Application number: KR1020150141994A
Authority: KR
Inventors: 최병철
Original assignee: 우경기술주식회사
Priority date: 2015-10-12
Filing date: 2015-10-12
Publication date: 2016-04-14

Abstract

The present invention relates to a method to build an underground structure suppressing transformation and using an external wall. The method includes: a first ground excavating step of excavating the inner ground of multiple steel piles after installing the steel piles more deeply than underground facilities such as basement drain pipes, gas pipes, and water supply pipes in an area in which an underground structure is built; a combination step of installing a rear pile, staying away from the rear surface of the steel piles, in the middle of the first ground excavating step, installing a furring strip on the inner surface of the steel piles, and combining the strip with the rear pile by using a tie rod; a second ground excavating step of excavating the ground, staying away from the excavated surface from the first ground excavating step; a primary ground reinforcing step of building pressure type soil nailing, a drain board, a wire mesh, and primary shotcrete on the excavated surface from the second ground excavating step; a repeating step of repeating the first and second ground excavating steps to a depth where the underground structure is to be built; a secondary ground reinforcing step of treating the surface from the primary ground reinforcing step with secondary shotcrete and waterproofing; and an underground structure building step of building the underground structure by installing an underground drain hole in the lowermost part of the surface of the secondary ground reinforcing step and using the surface as an outer wall cast. Therefore, since an underground soil blocking structure is built in the upper part in advance and a top-down construction method is used for the lower part, the underground structure is safely and economically built while the excavated neighboring ground is safely supported, and the speed of the construction is much faster.

Description

BACKGROUND OF THE INVENTION Field of the Invention [0001] The present invention relates to a method of constructing an underground structure,

The present invention relates to a deformation-suppressing and combined-type underground structure construction method, that is, a complex deformation-suppressing and joint-type underground structure construction method in which an underground cladding structure is installed at an upper side and a tower down-

Conventional methods of constructing an underground structure are classified into a method of completely excavating the ground after constructing the underground retaining structure, a method of constructing the underground structure, and a method of constructing the underground structure by the tower down method without preceding the underground retaining structure .

As a method of completely excavating the ground after constructing the underground retaining structure and constructing the underground structure, the method of constructing the steel retaining structure by the steel file, the steel wale, and the steel bracket, or by preheating the earth anchor retaining structure with the steel wale and the earth anchor It is also possible to construct the underground concrete pile cladding structure by putting on-site concrete piles with a cast-in-place concrete pile, steel wale, and earth anchor, or to excavate the ground and construct an underground structure .

The method of completely excavating the ground and constructing the underground structure after the construction of the underground retaining structure in advance is a good method with low construction cost and many construction examples. However, depending on the ground conditions, the deformation of the retaining structure or the collapse of the retaining structure And there is a problem in that the foundation must be excavated beyond the building limit line in order to secure a space for installing the outer wall form of the underground structure at the time of constructing the underground structure. In addition, when excavating the ground, it affects the adjacent site, causing cracks in the building on the adjacent site, and causing a sink hole in the adjacent site.

In addition, the method of constructing the underground structure by the tower-down method does not include the construction of the underground earth retaining structure, but the steel pile, the drilling type drilling pile, the underground continuous wall are installed, Method.

The above-mentioned tower-down method does not cause ground disturbance such as ground deformation of an adjacent site, and there is no fear of ground separation, but the construction cost is very high and the construction speed is slow.

Patent 1: Korean Patent No. 10-0957599

In order to solve the above-mentioned problems, the present invention can securely support an excavated adjacent ground by safely and economically constructing an underground structure by installing a underground clay structure on the upper side and a top down construction method on the lower side, To provide excellent deformation suppression and a method of constructing a combined wall underground structure.

In addition, in order to prevent the deformation and collapse of the upper ground, which is the most deformed, by binding the steel wale band to the backside pile with the tie rod in the upper side, do.

In addition, by using the top down method using the pressure type soil nailing in the lower side, it is possible to suppress the deformation of the lower ground excavation surface, to prevent the cracks of buildings and the like on the adjacent ground, To provide strain relief and a method of constructing a combined underground structure that does not require an anchor.

In addition, in the case of the lower side, the ground reinforcement surface can be used as an outer wall formwork to construct the underground structure, and the ground can be excavated within the building threshold, and the terrain area and the earthwork can be greatly reduced, the workability can be improved, Deformation suppression and a method of constructing a combined wall underground structure.

Also, the earth pressure and waterproofing of the underground structure are treated in the earth structure, and therefore, there is a need to provide a method of constructing a submerged structure and suppressing deformation that does not require separate earth pressure and waterproofing work.

In addition, by providing a waterproof plate on the lower surface of an underground structure, it is intended to provide a method of suppressing deformation that prevents underground structures from being corroded and leaking, and a method of constructing a combined underground structure by completely blocking groundwater penetrating into an underground structure.

In addition, by providing a groundwater collecting device at the lower end of the drainage plate and connecting the groundwater collecting device to the underground drainage port, a deformation-suppressing and joint-type underground structure construction method capable of easily introducing and discharging water infiltrating from the side to the underground drainage hole .

The present invention also provides a method of constructing a submerged underground structure by suppressing the clogging of the underground drainage port by effectively filtering earth and other foreign matter by providing a first wire netting and a second wire netting in the U-shaped member of the groundwater collecting apparatus.

The method of the present invention for suppressing deformation and assembling a subterranean structure is a method of suppressing deformation and a method of constructing a subterranean structure in which an underground structure such as a subterranean sewage pipe, A first ground excavation step of excavating an inner ground of the steel material pile after installing a plurality of steel material piles at a depth equal to or greater than a predetermined depth; Wherein during the first stage ground excavation step, a rear surface file is installed so as to be spaced apart from the back surface of the steel material pile, a steel wale is installed on the inner surface of the steel material pile, and the steel wale band and the rear surface file are bound by a tie rod A binding step; A two-stage ground excavation step of excavating the ground so as to be spaced inward from the excavation surface by the one stage ground excavation step (which is also referred to as a first stage ground excavation surface); A primary ground reinforcement step of applying a pressure type soil nailing, a drainage plate, a wire mesh, and a primary shotcrete to an excavation surface (also referred to as a two-stage ground excavation surface) by the two-stage ground excavation step; Repeating the two stage ground excavation step and the primary ground reinforcement step to a depth to which the underground structure is to be installed; A secondary ground reinforcement step of performing a secondary shotcrete and a waterproof treatment on the reinforcement surface (also referred to as a primary ground reinforcement surface) by the primary ground reinforcement step; A ground draining hole is provided on the lowermost side of the reinforcing surface by the secondary ground reinforcement step (which is also referred to as a secondary ground supporting surface), and the reinforcing surface by the secondary ground reinforcing step is utilized as an outer wall form, The underground structure construction stage; .

The waterproof plate may further include a waterproof plate provided on a lower surface of the underground structure, wherein a longitudinal cross section of the waterproof plate has a curved surface whose center is convex downward or a V-shaped shape whose center is protruded downward, It may be a concavo-convex shape.

The groundwater collecting device may further include a U-shaped member provided on the lower side of the drainage plate, and a hose connecting the U-shaped member and the ground drainage port to drain the groundwater. can do.

The groundwater collecting device may include a wedge on an outer surface of the U-shaped member, and a support bar between the vertical flanges of the U-shaped member.

The groundwater collecting device may further include a first rib and a second rib which are larger in diameter than the first rib and are provided on the outer side of the first rib, The first rib may be coupled to the first rib, and the second rib may be coupled to the second rib.

Further, the groundwater collecting device may further include a protection net for protecting the first and second lines between the two vertical flanges of the C-shaped member.

Through the present invention, it is possible to safely and economically construct an underground structure while securely supporting an excavated adjacent ground by installing the underground sand retaining structure on the upper side and the tower down construction method on the lower side, thereby providing an excellent effect of the construction speed .

Further, in the case of the upper side, the steel wale band is bound to the back side pile with the tie rods, thereby preventing deformation and collapse of the upper ground, which is the most deformed, and preventing the breakage of the underground pile.

In addition, by using the top down method using the pressure type soil nailing in the lower part, it is possible to prevent the deformation of the lower ground excavation surface, to prevent the cracks of buildings and the like on the adjacent ground, It is possible to provide an effect that it is not necessary to provide an anchor.

In addition, in the case of the lower side, the ground reinforcement surface can be used as an outer wall formwork to construct the underground structure, and the ground can be excavated within the building threshold, and the terrain area and the earthwork can be greatly reduced, the workability can be improved, Effect can be provided.

In addition, since earth pressure and waterproofing of underground structures are treated in the soil structure, separate earth pressure and waterproofing works are not necessary.

Further, by providing a waterproof plate on the lower surface of the underground structure, it is possible to completely prevent groundwater penetrating into the underground structure, thereby providing an effect of preventing corrosion and leakage of underground structures.

Further, the groundwater collecting device is provided at the lower end of the drain pan, and the groundwater collecting device is connected to the underground drain hole, whereby water infiltrating from the side can be easily guided to the underground drain hole and drained.

Also, since the first and second lines are provided on the U-shaped member of the groundwater collecting device, it is possible to effectively prevent the clogging of the underground drain port by effectively filtering earth and other foreign matter.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a flow chart showing a method of constructing a submerged underground structure and suppressing deformation according to an embodiment of the present invention; FIG.
Fig. 2 is an overall view showing a state of being constructed according to Fig. 1 and its detailed drawings.
3 to 6 are an enlarged view or an enlarged front view of the respective drawings in Fig.
7 is a perspective view showing a waterproof plate provided on a lower surface of an underground structure to be constructed.
8 is a cross-sectional view showing a groundwater collecting apparatus provided at the lower end of the drain pan.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In the drawings, like reference numerals are used to refer to like elements throughout the drawings, even if they are shown in different drawings. In the following description of the embodiments of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the difference that the embodiments of the present invention are not conclusive.

In describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, May be "connected "," coupled "or" connected ".

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a deformation suppression method and an assembled underground structure construction method according to an exemplary embodiment of the present invention will be described in detail with reference to the drawings.

1 to 6, a method of constructing a deformation-suppressing and coupled-type underground structure according to an exemplary embodiment of the present invention includes a first stage ground excavation step, a binding step, a second stage ground excavation step, , An iterative step, a secondary ground reinforcement step, and an underground structure construction step.

The first stage ground excavation step is a step of excavating the steel material file 211 to the depth of the underground sewer (10) such as the underground sewer pipe, the gas pipe, the water pipe, etc. in the area where the underground structure (20) And a step of excavating the inner ground of the steel material pile 211 after the pile is installed. At this stage, the installation depth of the steel material file 211 is set to be greater than or equal to the depth at which the underground buried material 10 is buried and deeper than the designed first stage ground excavation depth. In this case, the cross-section of the steel material file 211 may have various shapes such as a circle, a rectangle, and an H shape. In addition to the steel material file 211, an established concrete file, RC file, PC file, PHC file,

In the binding step, the back pile 213 is installed so as to be spaced apart from the back surface of the steel pile 211 during the first stage ground excavation step, and after the steel pavement 215 is installed on the inner surface of the steel pile 211, The tie rods 215 and the back side files 213 are tied to the tie rods 217. Therefore, the binding step is carried out during the first stage ground excavation, and the remaining first stage ground excavation is completed after the binding step. Since the upper side of the steel material pile 211 is bound to the tie rod 217 and the lower side is fixed to the ground, there is no need to provide a separate strut or the like, so that the subsequent construction is convenient, It will safely protect underground objects. At this time, the installation position of the back surface file 213 is determined in consideration of the type of the ground, the strength required to support the steel material file 211, the underground buried material 10, and surrounding conditions such as roads and surrounding buildings.

In the first stage ground excavation step, the steel material file 211 is bound to the back surface file 213 by the tie rod 217 and is excavated to a larger extent than the following two-stage ground excavation area, It is to protect various underground materials safely and to secure the space for the next steps.

The second stage ground excavation step is a step of excavating the ground with a certain distance from the first stage ground excavation surface to the inside. Since the second stage ground excavation surface is the surface contacting the outer wall of the underground structure 20, the distance from the first stage excavation surface is the work space for installing the outer wall formwork on the upper side of the underground structure 20, The required spacing space, and subsequent work space. The second stage ground excavation should be excavated stepwise to the appropriate depth without the collapse or deformation of the ground considering the surrounding buildings and types of grounds.

As described above, according to the present invention, the first stage ground excavation step is performed prior to the underground earth retaining structure, and the second stage ground excavation step is performed by the tower down method, thereby safely supporting the excavated adjacent ground, And the construction speed is fast.

The primary ground reinforcement step is a step of constructing a pressure type soil nailing 221 on the second ground excavation surface, installing a drainage plate 225 and a wire mesh 227, and installing the primary shotcrete 229 . The pressure type soil nailing 221 is formed by forming a hole in a second stage ground excavation surface and inserting a nail 222 into the hole and then forming a grouting 223. The nail 222 is made of a plastic rod, , Steel bar, and the like can be used.

In the repeating step, the two-stage ground excavation step and the first ground reinforcement step are repeatedly performed until the depth of the underground structure 20 is desired to be constructed.

The groundwater collecting device 250 (see FIG. 8) may be installed at the lowermost end of the drainage plate 225 to guide the water flowing down the excavation surface to the underground drainage port 30 to be installed at a later stage . The groundwater collecting apparatus 250 includes a U-shaped member 251 disposed below the drainage plate 225 and a hose 253 connecting the U-shaped member 251 and the ground drainage port 30 to drain the groundwater. The wedge 255 is provided on the outer surface of the U-shaped member 251 so that the groundwater collecting device 250 can be easily installed on the excavation surface. At this time, the wedge 255 may be integrally formed with the C-shaped member 251, but it may be detachable with a bolt or the like. A first rib 257 and a second rib 257 are formed on the upper side of the horizontal flange where the hose 253 of the C-shaped member 251 is connected, A second rib 259 is formed on the first rib 259 and a first rib 261 is coupled to the first rib 257 and a second rib 269 is coupled to the second rib 259, The groundwater collecting device 250 and the underground drainage port 30 can be prevented from being clogged by effectively filtering earth and other foreign substances in addition to the groundwater. A protection net 267 is provided between both vertical flanges of the U-shaped member 251 to protect the first and second wire drawing ribs 261 and 263. It is possible to prevent the vertical flange from being distorted by the earth pressure. The U-shaped member 251 may have a continuous shape or may be intermittently installed only where the drain plate 225 is located.

The second ground reinforcement step is a step of applying a second shotcrete 231 to the primary ground reinforcement surface and waterproofing 233 using a drainage sheet or the like.

The underground structure constructing step is a step of installing the underground drainage hole 30 at the lowermost side of the secondary ground reinforcement surface and constructing the underground structure 20 using the secondary ground reinforcement surface as the outer wall formwork.

The second shotcrete 231 and the waterproofing treatment 233 are applied to the ground excavation surface of the second excavation surface, the pressure nailing ring 221, the drainage plate 225, the wire mesh 227 and the first shotcrete 229, , It can be used as an outer wall form of an underground structure, and the terrain area and the earthwork are greatly reduced, and the waterproofing and earth pressure of the underground structure can be treated in the earth structure, The structure can be constructed safely and economically, and the workability is improved, the air is saved, and it is economical because there is no construction method of the outer wall formwork. In addition, it is not necessary to provide a buoyancy anchor necessary for buoyancy resistance of underground structures as a sole nailing sidewall structure.

7) is installed on the lower surface of the underground structure 20 to completely block the penetration of the groundwater into the underground structure 20 and the corrosion of the underground structure 20 , Leakage, and the like. A longitudinal cross section (a cross section perpendicular to the underground drain hole) of the waterproof plate 240 may be a curved surface or a V-shaped shape having a downward convex center, and a transverse cross section may have a concavo-convex shape. This is for guiding groundwater below the underground structure 20 toward the underground drainage port 30 and draining the same to the outside.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. That is, within the scope of the present invention, all the constituent elements may be constituted or operated selectively in combination with one or more. Furthermore, the terms "comprises", "comprising", or "having" described above mean that a component can be implanted unless otherwise specifically stated, But should be construed as including other elements. All terms, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Commonly used terms, such as predefined terms, should be interpreted to be consistent with the contextual meanings of the related art, and are not to be construed as ideal or overly formal, unless expressly defined to the contrary.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

10: Underground
20: Underground structures
211: Steel file
213: Bottom file
215: Steel wale
217: Tie rods
221: Pressure type soil nailing
222: Nail
223: Grouting
225: Drain plate
227: Wire Mesh
229: Primary shotcrete
231: Second shotcrete
233: Waterproof treatment
240: Waterproof plate
250: groundwater collecting device
251: C-shaped member
253: Hose
255: Wedge
257: first rib
259: second rib
261: 1st Turn
263: Second Display
265: Support bar
267: Protection net
30: Underground drainage

Claims

In the method of constructing a submerged structure,
A first stage ground excavation step of installing a plurality of steel material piles at a depth not less than an underground sewer such as an underground sewage pipe, a gas pipe, or a water pipe in an area where the underground structure is to be installed, and then digging an inner ground of the steel material pile;
Wherein during the first stage ground excavation step, a rear surface file is installed so as to be spaced apart from the back surface of the steel material pile, a steel wale is installed on the inner surface of the steel material pile, and the steel wale band and the rear surface file are bound by a tie rod A binding step;
A two stage ground excavation step of excavating the ground so as to be spaced inward from the excavation surface by the one stage ground excavation step;
A primary ground reinforcement step of constructing a pressure type soil nailing, a drainage plate, a wire mesh, and a primary shotcrete on an excavation surface by the two-stage ground excavation step;
Repeating the two stage ground excavation step and the primary ground reinforcement step to a depth to which the underground structure is to be installed;
A secondary ground reinforcement step of performing secondary shotcrete and waterproofing on the reinforcement surface by the primary ground reinforcement step;
An underground structure construction step in which an underground drainage hole is installed on the lowermost side of the reinforcement surface by the secondary ground reinforcement step and a reinforcement surface by the secondary ground reinforcement step is used as an outer wall formwork to construct the underground structure; A method of constructing a deformation-suppressing and collapsible underground structure.

The method according to claim 1,
Further comprising a waterproof plate provided on a lower surface of the underground structure,
Wherein the longitudinal cross section of the waterproof plate is a curved surface whose center is convex downward or a V-shaped shape whose center is protruded downward, and the lateral cross section of the waterproof plate is a concavo-convex shape.

The method according to claim 1,
Further comprising a groundwater collecting device provided at a lower end of the drain pan,
Wherein the groundwater collecting device includes a U-shaped member provided on a lower side of the drainage plate, and a hose connecting the U-shaped member and the ground drainage port to drain the drainage.

The method of claim 3,
Wherein the groundwater collecting device is provided with a wedge on an outer surface of the C-shaped member, and a supporting bar is provided between both vertical flanges of the C-shaped member.

The method of claim 3,
Wherein the groundwater collecting device has a first rib and a second rib which are larger in diameter than the first rib and are provided on the outer side of the first rib,
Wherein the first rib is coupled to a first thread and the second rib is coupled to a second thread.

The method of claim 5,
Wherein the groundwater collecting device further comprises a protection net to protect the first and second lines of thread between the two vertical flanges of the C-shaped member.