KR101858223B1 - Friction reduction apparatus for reducing friction of non-open cut structure and construction method using friction reduction apparatus - Google Patents

Abstract

The present invention relates to a friction reduction apparatus to construct a non-open cut structure, and a non-open cut structure construction method using the same. According to the present invention, the apparatus comprises: a friction reduction device disposed on a start point to perform press-fitting while traversing ground along a finish point; and a traverse structure sequentially coupled to a rear side of the friction reduction device in accordance with press-fitting of the friction reduction device. The friction reduction device includes: a front end structure formed corresponding to a cross-sectional shape of the traverse structure; a front end shoe fixed on a front side of the front end structure; a skirt having one end integrally coupled to a rear side of the front end structure and having the other end extended to form a passage in a longitudinal direction of the traverse structure; and a friction blocking plate inserted into the passage to be extended to the rear side of the traverse structure. According to the present invention, in towing or press-fitting of a structure after the friction reduction device is installed, relaxation of ground is reduced by reduction or blocking of a frictional force between the ground and the structure, subsidence of the ground is able to be prevented. Accordingly, provided are effects capable of preventing a collapse of a soil body and stably constructing a structure.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a friction reducing apparatus for constructing a non-

The present invention relates to a friction reducing apparatus for constructing a non-fitted structure and a method of constructing the non-fitted structure using the same. More particularly, the present invention relates to a friction reducing apparatus for constructing a non- The present invention relates to a non-unfolding structure using a friction reducing device that can be installed while crossing without damaging the passage of a wire, and a method of constructing a nonflammable structure using the same.

This is a social problem, for example, where the upper ground is recessed or underground cavities are generated during the crossing construction of the lower part of the urban transportation line, which often causes anxiety to the citizens. The major causes of the earthquake safety accidents are the breakdown of underground materials, aging, increase in groundwater leakage due to excavation work, and poor construction (Ministry of Land Transportation, 2014). In engineering, soil condition, stress change, Flow and so on.

On the other hand, in order to construct the urban infrastructures, there are frequent parallel and intersection of ground and underground traffic facilities due to improvement of traffic facilities and establishment of new facilities. As a result, urbanization demand and saturation of the ground space are accompanied by the development of the underground space and the ground, resulting in ground deformation, which can lead to a major accident such as the ground subsidence. Therefore, there is a need for a construction method for minimizing the occurrence of disasters.

In addition, expansion of urban areas due to the development of new cities is required to appropriately suppress subsidence and deformation occurring in the upper ground or facilities during horizontal excavation (close-up construction) for construction of high-altitude roads, subways, railways, Considering the underground burials, it is necessary to apply the underground crossing method, which can be bypassed, to prevent ground subsidence and prevent secondary damage.

In order to solve such a problem, Korean Unexamined Patent Publication No. 10-0538272 discloses a construction method of a non-built underground passage using a prefabricated structure. The 'unfolded underground passage construction method using the prefabricated structure', which is disclosed, has the feature that the structure can be installed through the crossing to relatively reduce the ground deformation. However, In the process of traversing the structure, the ground is loosened due to the friction between the structure and the ground, so that the ground settlement may occur.

(Korea Patent No. 10-0538272, December 21, 2005)

An object of the present invention is to provide a friction reducing device for constructing a non-unfolding structure that can be effectively applied while traversing the unfolded structure while preventing loosening of the ground at the time of construction of the unfolded structure and a method of applying the non- will be.

The objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, according to an embodiment of the present invention, a starting point and an end point of an underground structure are respectively reinforced by a first earth wall, A friction reducing device for constructing a non-unfolding structure in a direction crossing the end point at a starting point by forming a viewpoint work space and an end point work space by excavating between a turret wall and a second turret wall is disposed at a point of time, A friction reducing device; And a transverse structure that is sequentially coupled to a rear portion of the friction reducing device according to the press-fitting of the friction reducing device, wherein the friction reducing device includes: a distal end structure formed to correspond to a cross-sectional shape of the transverse structure; An end shoe fixed to the front of the end structure; A connecting steel having one end integrally joined to the rear of the distal end structure and the other end extending to form a flow path in the longitudinal direction of the transverse structure; And a friction interrupting plate inserted into the flow path and extending rearward of the transverse structure.

In this embodiment, the tip shoe is an upper plate having one end fixed to the front upper side of the distal end structure and the other end extending in the push-in direction; And a pair of side plates formed on both side surfaces of the upper plate so as to have a width decreasing from the upper side to the lower side and being fixed to the end structure, wherein the upper side plate and the side plate are formed in parallel with each other in the press- A slit hole may be formed.

In the present embodiment, the transverse structure can be formed as a precast structure or a cast-in-place structure at the rear end of the friction reducing device in accordance with the press-fitting of the friction reducing device.

The starting point and the end point of the ground structure according to the embodiment of the present invention are respectively reinforced by the first earth wall and the second earth wall is spaced apart from the first earth wall by a predetermined distance to reinforce the second earth wall. A method for constructing a non-unfolded structure using a friction reducing device for excavating a ground in a direction crossing an end point by forming a viewpoint workspace and an endpoint workspace at a starting point, comprising a front structure formed to correspond to a cross- A front end shoe fixed to the front of the structure and having a slit hole formed in parallel along the press-in direction, one end being integrally connected to the rear of the front end structure, and the other end being formed in the longitudinal direction of the transverse structure transversely crossing the ground Disposing a friction reducing device having an extending connecting steel at a time; Press-fitting the friction reducing device so as to traverse the ground; Constructing at least one steel pipe multi-step grouting along the slit hole after the friction reducing device is press-fitted to the ground a predetermined depth; And inserting a frictional blocking plate in the passage to extend toward the transverse structure disposed at the rear end of the friction reducing device.

In this embodiment, in the case where the transverse structure is formed by field casting, (a) installing an additional third soil wall for installing a reaction force between the first and second earth walls of the end point working space; (b) providing a traction jack for forming a small-diameter horizontal perforation toward the viewpoint from the third recirculating wall, extending the horizon along the horizontal perforation so as to penetrate the viewpoint, and connecting the third recirculating wall to the strand; (c) connecting a strand extending to the point of time to a structure provided with the friction reducing device or the end shoe; (d) towing the friction reducing device at predetermined intervals using a traction jack; And (e) installing the transverse structure in situ for a predetermined spaced distance, wherein steps (d) through (e) may be repeated to install the transverse structure through the ground.

In this embodiment, in the case where the transverse structure is formed by putting into place, (a) installing a reaction force band in the viewpoint work space; (b) extending the spacing member from the front of the reaction force band toward the friction reducing device; (c) disposing a press-in jack between the rear of the friction reducing device and the spacing member; And (d) actuating the press-in jack to move the friction reducing device forward by a predetermined distance using a reaction force, and performing a field shake behind the friction reducing device, and in order to install the transverse structure through the ground , (b) to (d) may be repeated.

The non-closed structure using the friction reducing device according to the present invention and the method of applying the non-closed structure using the same reduce the relaxation of the ground by reducing or blocking the frictional force between the ground and the structure at the time of pulling or pressing the structure after installing the friction reducing device It is possible to prevent the ground settlement. Through this, it is possible to prevent the collapse of the body and to construct the structure stably.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the following description.

1 is a perspective view of a friction reducing device according to an embodiment of the present invention.
2A is a cross-sectional side view of a friction reducing device according to an embodiment of the present invention.
FIG. 2B is a top view of the friction reducing device according to the embodiment of the present invention. FIG.
3 is a view showing a connection state of ends of a friction reducing device and a transverse structure according to an embodiment of the present invention.
4 is a cross-sectional view of a friction reducing device having a front platen according to an embodiment of the present invention.
Fig. 5 is a view of Fig. 4 viewed from the direction "A ".
6 is a cross-sectional view showing a multi-step grouting of a steel pipe according to an embodiment of the present invention.
7 is a view showing a method of installing a spot installation according to a first embodiment of a non-installation structure using a friction reducing device according to an embodiment of the present invention.
FIG. 8 is a view showing a method of constructing a spot installation according to a second embodiment of the non-installation structure using the friction reducing device according to the embodiment of the present invention.
9 is a view showing a method of constructing a precast structure according to a first embodiment of a non-installation structure using a friction reducing device according to an embodiment of the present invention.
10 is a view showing a method of constructing a precast structure according to a second embodiment of a non-installation structure using a friction reducing device according to an embodiment of the present invention.
11 is a view showing a pulling method of a non-fitting structure using a friction reducing device according to an embodiment of the present invention.
12 is a view showing a press-in method of a non-installation structure using a friction reducing device according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Note that, in the drawings, the same components are denoted by the same reference symbols as possible. Further, the detailed description of known functions and configurations that may obscure the gist of the present invention will be omitted. For the same reason, some of the components in the drawings are exaggerated, omitted, or schematically illustrated.

Also, throughout the specification, when an element is referred to as " including " an element, it is understood that the element may include other elements as well, without departing from the other elements unless specifically stated otherwise. Also, throughout the specification, the term " on " means located above or below a target portion, and does not necessarily mean that the target portion is located on the upper side with respect to the gravitational direction.

FIG. 1 is a perspective view of a friction reducing apparatus according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of a friction reducing apparatus according to an embodiment of the present invention. 3 is a view showing a connection state of a traverse end of a traverse structure and a friction reducing device according to an embodiment of the present invention.

1 to 3, a non-installation structure using a friction reducing device according to an embodiment of the present invention includes a first earth wall 1 and a second earth wall 2 at a time point S and an end point E at which an underground structure is installed, The first toothed wall 1 and the second toothed wall 2 are reinforced by a predetermined distance from the first toothed wall 1 to be reinforced by the second toothed wall 2 to excite the first toothed wall 1 and the second toothed wall 2, The present invention relates to a structure for constructing an end point working space 4 while pressurizing a ground in a direction transverse to an end point E at a point S and comprising a friction reducing device 100 and a transverse structure 200 do. Reference numerals not shown in Figs. 1 to 3 refer to Fig.

The frictional abatement device 100 is disposed at the viewpoint S and is press-fitted along the end point E along the ground. The frictional abatement device 100 includes a front structure 110, a front shoe 120, a connecting steel 130, 140).

The distal end structure 110 is formed to correspond to the cross-sectional shape of the transverse structure 200, and is formed into a box shape. The leading end structure 110 includes a plurality of grid reinforcing plates (not shown) therein, and a shear key 112 may be formed to prevent horizontal sliding.

The tip shoe 120 is fixed to the front of the distal end structure 110 and includes an upper plate 121, a pair of side plates 122, a slit hole 123 and a lower plate 124.

The upper plate 121 and the lower plate 124 have one end fixed to the front upper side of the distal end structure 110 and the other end extended in the press-in direction. The pair of side plates 122 are formed such that one end thereof is reduced in width from the upper side to the lower side of the upper plate 121 and the other end is fixed to the lower plate 124. Accordingly, the upper plate 121, the lower plate 124, and the side plates 122 can be fixed to the end structure 110 in a rigid rigid structure with respect to each other.

The slit holes 123 are formed in the upper plate 121 and the side plate 122 at least one in parallel with respect to the press-in direction of the friction reducing device 100, respectively. The slit hole 123 is formed to be long along the press-in direction, thereby serving as a guide for a mounting position of the multi-stage grouting 400 of the steel pipe to be described later. In the present invention, the slit holes 123 are formed to be long along the longitudinal direction, but they may be formed as a plurality of holes at equal intervals along the press-in direction of the tip shoe 120 (not shown). When the steel pipe multi-stage grouting 400 is formed as described above, it is possible to keep the grouting interval constant and to shorten the construction time by omitting a separate surveying step for maintaining the spacing.

The connecting steel 130 is disposed between the end structure 110 and the transverse structure 200. One end of the connecting steel 130 is joined to the rear of the end structure 110 and the other end extends toward the transverse structure 200. Thus, the connecting steel 130 disposed between the end structure 110 and the transverse structure 200 forms a working space to form a working space for inserting the frictional blocking plate 140. The connecting steel 130 serves to guide the transverse structure 200 to slide so that the front end of the transverse structure 200 can come into contact with the front structure 110 when the transverse construction of the structure is completed.

The connecting steel 130 forms a space in which a press-fit jack is disposed between the end structure 110 and the transverse structure 110, and can form a working space for the joint waterproofing process when the structures come into contact with each other. Accordingly, the connecting steel 130 can provide a tight joint between the front structure 110 and the transverse structure 200, which are in contact with each other after the construction is completed, through the urethane resin, thereby enhancing the waterproof effect of the structure.

The other end of the connecting steel 130 is located above the circumference of the outer surface of the transverse structure 200 and a space is formed between the connecting steel 130 and the transverse structure 200. A space-maintaining plate 131 is disposed in the space formed in the longitudinal direction. A flow path for inserting the friction interrupting plate 140 is formed between the gap maintaining plates 131.

A plurality of spacing holding plates 131 coupled to the lower side of the connecting steel 130 form a plurality of flow paths into which the frictional blocking plate 140 can be inserted toward the transverse structure 200, It is possible to induce smooth insertion of the friction interrupting plate 140 by preventing deformation of the connecting steel 130 from the earth pressure.

The frictional blocking plate 140 is formed of a single plate, is inserted into the flow passage and extends rearward from the upper surface and both side surfaces of the transverse structure 200, and the surfaces abutting each other are fixed by welding.

On the other hand, an initial frictional blocking plate 141 is provided at the time point S. The initial frictional blocking plate 141 is fixed at one end to the frictional blocking plate fixing portion 143 of the first toothed wall 1 at the time point S and the other end is press-fitted along the longitudinal direction of the transverse structure 200, do. At this time, the other end of the initial frictional blocking plate 141 is exposed to the connecting steel of the frictional reducing device 100, and is welded to the frictional blocking plate 140. Accordingly, it is possible to induce the friction reducing apparatus 100 to move while one end of the friction interrupting plate 140 is fixed along the longitudinal direction.

The frictional blocking plate 140 is inserted along the flow path as the frictional abatement device 100 is press-fitted into the ground, and one side surface of the frictional blocking plate 140 is sequentially welded and fixed to the upper surface and the side surface of the transverse structure 200, As shown in FIG. The frictional interrupting plate 140 can prevent the frictional abatement device 100 and the transverse structure 200 from contacting the frictional abatement device 100 and the transverse structure 200 with a small pressure by intercepting or reducing the frictional force between the torquelet and the structure when the frictional abatement device 100 and the transverse structure 200 are press- It is possible to facilitate the press-fitting, thereby preventing the disturbance of the surrounding ground, preventing the strength of the ground from being lowered, and improving the construction efficiency.

On the other hand, the surface of the frictional blocking plate 140, which is in contact with the transverse structure 200, may have a plurality of convex embossings 142 protruding downward. The embossing 142 may reduce the contact area between the frictional barrier plate 140 and the transverse structure 200 to further reduce the frictional force between the upper ground and the transverse structure so that the transverse structure 200 and the frictional reducing device 100 It is possible to provide smooth indentation.

FIG. 4 is a cross-sectional view of a friction reducing device having a front platen according to an embodiment of the present invention, and FIG. 5 is a view of FIG. 4 as viewed from the "A" direction.

Referring to FIGS. 4 and 5, the friction reducing device for constructing a non-fastening structure according to an embodiment of the present invention may further include a front pressing plate 300.

The front platen 300 is disposed on the inner side of the front of the friction reducing apparatus 100. The front platen 300 is disposed on the inner side of the front side of the friction reducing apparatus 100. When the forward pressing of the friction reducing apparatus 100 is performed, A face plate 310, a face jack 320, a guide rail 330, and a latch 340. The front plate 310, the face plate 320, the guide rail 330,

The front plate 310 may have a substantially rectangular plate shape and may have a pair of grouting holes 311 and a plurality of pressure reducing holes 312 on the front surface thereof.

The grout holes 311 are formed in a pair in the central region of the front plate 310. It is possible to prevent the collapse of the back surface soil and enhance the effect of preventing the front press-fitting and the collapse of the excavation surface by perforating the gravel subjected to front press through the grout hole 311 and reinforcing the grout. In addition, it is possible to determine whether or not there is an excavation hole in the front excavation area, and it is possible to prevent ground penetration due to excavation by reinforcing it.

The pressure reducing hole 312 reduces the water pressure acting on the front plate 310 by causing the groundwater W on the front surface to be guided to the inside of the front plate 310 when the friction reducing device 100 is press- The frictional abatement device 100 can be smoothly press-fitted. At this time, the pressure decreasing hole 312 is formed to have a smaller diameter along the press-in direction. Therefore, when the groundwater is drained along the pressure reduction hole 312, the gravel of the large particles (GA) included in the gravel in the backward direction can block the pressure reduction hole 312 and prevent the induction of the groundwater from being lowered .

In addition, a plurality of reinforcing plates 313 may be provided on the back surface of the front plate 310, which is in contact with the gravel. The reinforcing plate 313 can be arranged in the radial direction so as to prevent the front plate 310 from being warped and to support the front plate 300 with a uniform load when the front pressing plate 300 is pushed along the front.

The face jack 320 The front plate 310 supports the front plate 310 so that the front plate 310 can be moved backward together with the gravel-like material when the friction reducing device 100 is pressed forward. 120, and the connecting member 321 extending to the other side is connected to the rear surface of the front plate 310. The face jack 320 is preferably disposed in each of the regions corresponding to the respective corners of the front plate 310 so as to uniformly support the earth pressure when the front face is press-fitted into the front face.

The guide rail 330 serves to guide the front plate 310 to move while maintaining the horizontal when the face plate 310 is moved forward and backward according to the expansion and contraction of the face jack 320.

The latch 340 is disposed at the center of the rear surface of the front plate 310 and can connect the heavy equipment to the latch 340 to move the front plate 310 rearward and then to remove the pressurized predetermined gravel.

6, the steel pipe multi-stage grouting 400 is inclined at a predetermined angle in the slit hole 123 according to the press-fitting of the friction reducing device 100 to insert a steel pipe into the steel body and inject grout through the inserted steel pipe. And is configured to reinforce the upper surface of the transverse structure 200 and one area of the lateral gravel so as to prevent the loosening of the gravel, and includes a steel pipe 410 and a grout body 420.

The steel pipe 410 has a diameter of about? 114 mm and a length of about 5 m. The steel pipe 410 is inclined at an angle within ± 0 to 15 degrees through a small punch and inserted into the ground after perforation. At this time, the steel pipe 410 is formed with a plurality of grout holes (not shown) along the longitudinal direction for grout injection.

When the cement paste is injected through the steel pipe 410, the grout body 420 is grout-reinforced body formed by transferring the cement paste to the body through the grout hole.

Accordingly, the steel pipe multi-stage grouting 400 prevents the ground from loosening when the friction reducing device 100 is press-fitted, thereby preventing the ground subsidence around the transverse structure 200 so that the structure and the surrounding ground are collapsed It is possible to securely and firmly construct the structure.

7 is a view showing a method of installing a spot installation according to a first embodiment of a non-installation structure using a friction reducing device according to an embodiment of the present invention.

First, the starting point S and the end point E at which the underground structure is installed are reinforced by the first toothed wall 1 and the second toothed wall 2 is spaced apart from the first toothed wall 1 by a predetermined distance . Thereafter, the first toothed wall 1 and the second toothed wall 2 are excavated to form a viewpoint work space 3 and an endpoint work space 4. Next, a friction reducing device 100 for pressurizing the ground in the direction transverse to the end point E at the time point S is disposed at the point of time S (S). At this time, the friction reducing device 100 is inserted into the ground to a predetermined depth by using the reaction force wall 6 in the viewpoint work space or the traction jack 7 installed in the end point working space, At least one steel pipe multi-stage grouting (400) is installed along the holes.

When the steel pipe multi-stage grouting 400 is completed, the transverse structure is repeated while welding the single frictional blocking plate along the flow path formed in the friction reducing device 100 while extending backward.

Hereinafter, a case in which the transverse structure is installed by the field installation of the reaction force type of the arrival base 4 will be described in more detail.

First, an additional tertiary wall 5 for installing an opposing force 6 is installed between the first and second walls 2 and 1 of the working space 4. (a) End point (E)

(b) forming a small hole horizontally perforated (8) toward the viewpoint in the third earth wall (5), forming a hole into which a stranded wire is inserted for horizontal drilling and towing of the structure, inserting a stranded wire along the horizontal hole, And a pull jack 7 for connecting the third earth wall 5 to the stranded wire is provided.

(c) A strand extending to the point S is connected to the friction attenuator 100 or the structure provided with the end shoe.

(d) The friction reducing device 100 is pulled toward the end point E at predetermined intervals by using the pulling jack 7.

(e) The transverse structure 200 is installed at a predetermined interval in which the friction reducing apparatus 100 is pulled. At this time, the support material (9) is installed at the time of construction of the transverse structure (200).

The steps (d) to (e) are repeated to install the transverse structure through the ground, and in the step (d) to step (e), the frictional interrupting plate and the multi-step grouting of the steel pipe are repeatedly performed, Completion of construction (f). At this time, the site piercing structure 200 slides along the connecting steel 130 so as to abut the rear end of the structure of the front structure 110 (box 1), and the lower side of the site piling structure 200 is put into place Thereby preventing cracks in the lower slab, which may occur during sliding of the spotting structure 200.

Meanwhile, when the frictional abatement device 100 is press-fit, the step of sanding the press-in gypsum through the grout hole 311 formed in the front pressing plate disposed inside the friction reducing device 100 through the front grouting step and the front pressing plate . Through such a process, it is possible to check whether there is an excavation on the ground to be press-fitted, and thereby it is possible to prevent the ground settlement that may occur during indentation by reinforcing the ground in advance by grouting (refer to FIG. 5). In the construction method described below, the process using the front platen can be applied, and a repetitive description will be omitted.

FIG. 8 is a view showing a method of constructing a spot installation according to a second embodiment of the non-installation structure using the friction reducing device according to the embodiment of the present invention.

First, the starting point and the end point at which the underground structure is installed are respectively reinforced by the first toothed wall 1 and the second toothed wall 2 is spaced apart from the first toothed wall 1 by a predetermined distance. Thereafter, the first workpiece wall 1 and the second workpiece wall 2 are excavated to form a viewpoint work space 3 and an endpoint workspace 4 so as to extend in the direction transverse to the end point E at the time point S A friction reducing device (100) for pressurizing the ground is disposed at a point (S). At this time, the friction reducing device 100 is pressurized to a predetermined depth in the ground by using the reaction force wall 6 in the viewpoint work space or the traction jack installed in the end point working space, and then, along the slit hole provided in the friction reduction device 100 At least one steel pipe multi-stage grouting (400) is installed.

When the construction of the steel pipe multi-stage grouting 400 is completed, a single frictional barrier plate 140 is extended along the flow path formed in the friction reducing device 100 while extending backward while welding. .

In this case, when the transverse structure 200 is installed in the viewpoint work space 3 by using the reaction force platform 6 in a field installation, the following additional process may be added.

First, (a) a reaction force band 6 is installed on the second toothed wall 2 of the viewpoint work space.

(b) The spacing member 10 is extended from the front of the reaction force band 6 toward the friction reducing device 100.

(c) A press-in jack 11 is disposed between the rear of the friction reducing device 100 and the spacer 10.

(d) By operating the press-in jack 11, the friction reducing apparatus 100 is moved forward by a predetermined distance using a reaction force, and the field pouring structure 200 is placed on the rear side of the friction reducing apparatus 100 do.

The steps (c) to (d) may be repeated to install the transverse structure through the ground. In the step (c) to step (d), the frictional cutoff plate and the multi- Complete construction of the structure (e). At this time, the field installation structure 200 slides along the connection steel 130 so as to abut the rear end of the end structure 110 (box 1), and the lower side of the field installation structure 200 is laid down after the sliding is completed It is possible to prevent cracks in the lower slab that may occur during sliding of the spotting structure 200.

9 is a view showing a method of constructing a precast structure according to a first embodiment using a friction reducing device according to an embodiment of the present invention.

First, the starting point S and the end point E at which the underground structure is installed are reinforced by the first toothed wall 1 and the second toothed wall 2 is spaced apart from the first toothed wall 1 by a predetermined distance . Thereafter, the first workpiece wall 1 and the second workpiece wall 2 are excavated to form a viewpoint work space 3 and an endpoint workspace 4 so as to extend in the direction transverse to the end point E at the time point S A friction reducing device 100 for pressurizing the ground is disposed at the arrangement time S.

At this time, the friction reducing device 100 is press-fitted into the ground at a predetermined depth using a drag jack installed in a reaction force wall or an end point working space in the viewpoint work space, Construction of steel pipe multi-step grouting.

When the steel pipe multi-stage grouting 400 is completed, the transverse structure is constructed by repeating the welding of the single frictional barrier plate along the flow path formed along the friction reducing device 100 while welding.

At this time, when the transverse structure is applied to the end point work space as a precast structure using the pulling jack 7, the following additional process may be added.

(a) forming a small-diameter horizontal perforation toward the viewpoint from the first recirculating wall 1 of the end point, inserting the strand 8 along the horizontal perforation to extend through the viewpoint, 1 by connecting the pulling jack 7 with the stranded wire 8.

(b) at least one precast structure 200 is continuously disposed at the rear end of the friction reducing device 100 and at least one first press-in jack 12a and a free At least one second press-in jack 12b is also disposed between each cast structure 200. [

(c) The first press-in jack 12a is actuated to press-fit the friction reducing device 100 forward.

(d) The precast structure 200a is moved forward by using at least one second press-in jack 12b disposed between the precast structures 200 disposed behind the friction reducing device.

(e) The precast structure 200b disposed at the rear end of the precast structure 200 is moved forward by using the traction jack 7 disposed at the end point.

(B) to (e) may be repeated to install the transverse structure through the ground, and the above-described frictional interrupting plate and the multi-step grouting of the steel pipe are repeatedly performed in steps (b) to (e) .

10 is a view showing a method of constructing a precast structure according to a second embodiment using a friction reducing device according to an embodiment of the present invention.

First, the starting point and the end point at which the underground structure is installed are respectively reinforced by the first toothed wall 1 and the second toothed wall 2 is spaced apart from the first toothed wall 1 by a predetermined distance. Thereafter, the first workpiece wall 1 and the second workpiece wall 2 are excavated to form a viewpoint work space 3 and an endpoint workspace 4 so as to extend in the direction transverse to the end point E at the time point S A friction reducing device 100 for pressurizing the ground is disposed at the arrangement time S. At this time, the friction reducing device 100 is press-fitted into the ground at a predetermined depth using a drag jack installed in a reaction force wall or an end point working space in the viewpoint work space, Construction of steel pipe multi-step grouting.

When the steel pipe multi-stage grouting 400 is completed, the transverse structure 200 is constructed while welding the single frictional barrier plate 140 along the flow path formed in the friction reducing device 100 while extending backward do.

In this case, when the transverse structure 200 is used to construct the precast structure using the reaction force band 6 disposed in the viewpoint work space 3, the following additional process may be added.

(a) The reaction force band (6) is installed in the viewpoint work space.

at least one first press-in jack is disposed at the rear end of the friction reducing device disposed at the time point (b).

(c) The spacer 10 is disposed between the first reaction force band and the first indentation jack 12a, and the first indentation jack 12a is operated to push the friction reduction device 100 forward.

(d) At least one precast structure 200 is disposed at the rear end of the friction reducing apparatus 100, and at least one second indentation jack 12b is disposed between adjacent precast structures.

(e) A spacing member 6 is additionally disposed between the second press-in jack 12d disposed at the rear end of the second press-in jack 12b and the reaction force band 6, and the second press-in jack 12d is operated Thereby pushing the friction reducing device 100 and the at least one precast structure forward.

(B) to (e) may be repeated to install the transverse structure through the ground, and the above-described frictional interrupting plate and the multi-step grouting of the steel pipe are repeatedly performed in steps (b) to (e) .

10 shows a structure in which a plurality of precast structures are successively arranged because the viewpoint work space 3 is wide and the site is easily secured. When a plurality of precast structures are continuously arranged in this manner, It is possible to place the press-in jack between the cast structures, and the above-mentioned construction procedure is based on a narrow viewpoint work space 3, but each construction method is substantially in the same range.

9 and 10, placing the second connecting steel 150 between the pre-cast structures 200 arranged in one direction. The second connecting steel 150 is formed so as to have a smaller inner diameter than the connecting steel 130 and can be guided to slide without interfering with the insertion of the friction reducing plate 140 that slides through the connecting steel 130 .

The second connecting steel 150 disposed between the precast structures 200 is formed in such a manner that when the transversal construction of the structure is completed as in the connection steel 130 described above, So that the transverse structure 200a can be brought into contact with the terminal end of the transverse structure 200a. In addition, the second connecting steel 150 forms a space for disposing a press-in jack between the transverse structures 200 adjacent to each other, and can form a working space for the joint waterproofing process when the structures come into contact with each other have. Accordingly, the second connecting steel 150 can provide a tight joint between the transverse structures 200, which are in contact with each other after the construction is completed, through the urethane resin, thereby enhancing the waterproof effect of the precast structure.

FIG. 11 is a view showing a pulling method of a non-fitting structure using a friction reducing device according to an embodiment of the present invention, FIG. 12 is a drawing showing a press fitting method of a non-fitting structure using a friction reducing device according to an embodiment of the present invention to be.

Referring to FIGS. 11 to 12, the non-installation structure according to the embodiment of the present invention can be installed through an indentation method or a pulling method. The multi-stage grouting 400 is formed along the ground G on the circumferential surface of the structure and is formed by a plurality of grout holes (not shown) formed along the inner circumferential surface of the steel pipe 410 and the steel pipe 410 So that the surrounding ground can be reinforced.

As the friction reducing device 100 moves along the transverse direction of the structure, the frictional blocking plate 140 is continuously arranged in the backward direction of the moving direction, thereby reducing or blocking the frictional force between the ground G and the structure, It is possible to prevent the relaxation of the liquid.

It should be noted that the embodiments of the present invention disclosed in the present specification and drawings are only illustrative of the present invention in order to facilitate description of the present invention and to facilitate understanding of the present invention and are not intended to limit the scope of the present invention. It will be apparent to those skilled in the art that other modifications based on the technical idea of the present invention are possible in addition to the embodiments disclosed herein.

100: Friction reducing device 110: End structure
120: leading shoe 130: connecting steel
140: Friction cut-off plate 200: Transverse structure
300: front pressure plate 310: front plate
320: Face Jack 400: Steel pipe multi-stage grouting
410: Steel pipe 420: Grout body

Claims (6)

The first earth wall and the second earth wall are reinforced by a first earth wall and a second earth wall spaced apart from the first earth wall by a predetermined distance and excavated between the first earth wall and the second earth wall, 1. A friction reducing device for forming a space and an end point working space and for constructing a non-fastening structure in a direction transverse to an end point at a starting point,
A friction reducing device disposed at the time point and press-fitting along the end point while traversing the ground; And
And a transverse structure that is sequentially coupled to the rear of the friction reducing device in response to the press-fitting of the friction reducing device,
The friction reduction device according to claim 1,
A distal end structure formed corresponding to a cross-sectional shape of the transverse structure;
An end shoe fixed to the front of the end structure;
A connecting steel having one end integrally joined to the rear of the end structure and the other end extending to form a flow path in the longitudinal direction of the transverse structure; And
And a friction interrupting plate inserted into the flow path and extending rearward of the transverse structure,
The connecting steel,
And a space extending toward the transverse structure such that one end thereof is coupled to the rear end of the distal end structure and the other end is located above the outer circumferential surface of the transverse structure,
Wherein a plurality of spacing plates are arranged in parallel along the longitudinal direction of the transverse structure in the space formed between the lower surface of the connecting steel and the upper surface of the transverse structure to form a plurality of flow paths along the direction of press-
Wherein the friction interrupting plate comprises:
Wherein an initial frictional blocking plate is fixed to a first turbulent wall at the time point, and a single plate is continuously inserted along the plurality of flow paths to be welded and fixed. The method according to claim 1,
The front end shoe
An upper plate having one end fixed to the front upper side of the distal end structure and the other end extending in the press-in direction; And
And a pair of side plates formed so that both side surfaces of the upper plate are reduced in width from the upper side to the lower side and fixed to the end structure,
Wherein the upper and side plates comprise:
And a slit hole formed in at least one or more parallel to the press-fit direction of the friction reducing device. The method according to claim 1,
The cross-
Wherein the friction reducing device is formed as a precast structure or a piling structure at the rear end of the friction reducing device according to the press-fitting of the friction reducing device. The first earth wall and the second earth wall are reinforced by a first earth wall and a second earth wall spaced apart from the first earth wall by a predetermined distance and excavated between the first earth wall and the second earth wall, A method of constructing a non-unfolded structure using a friction reducing device that forms a space and an end point work space and presses the ground in a direction crossing an end point at a starting point,
An end shoe having a slit hole fixed in front of the distal end structure and formed in parallel along a press-in direction, one end coupled to a rear end of the distal end structure, A connecting steel which extends toward the transverse structure so as to be located above the outer circumference of the transverse structure and forms a space therebetween and a longitudinal direction of the transverse structure in the space formed between the lower surface of the connecting steel and the upper surface of the transverse structure Arranging a plurality of spacing plates in parallel to form a plurality of flow paths along the press-in direction of the transverse structure;
Pressing the friction reducing device to traverse the ground;
Installing a front platen to limit rearward movement of the gravel collapsed in accordance with the press-fitting of the friction reducing device in the friction reducing device;
Constructing at least one steel pipe multi-step grouting along the slit hole according to the press-fitting of the friction reducing device into the ground;
Inserting a frictional blocking plate into the flow path and extending and fixing the transverse structure in the longitudinal direction; And
Separating the front platen from the inside of the friction reducing device, replenishing the press-in soil, and reinstalling the front platen,
Wherein the friction interrupting plate comprises:
Wherein an initial frictional blocking plate is fixed to the first turbulent wall at the time point and welded and fixed while a single plate is continuously inserted along the plurality of flow paths. 5. The method of claim 4,
When the transverse structure is formed by spotting,
(a) installing an additional third recirculating wall for installing a reaction force between the first recirculating wall and the second recirculating wall in the end point working space;
(b) a traction jack which forms a horizontal perforation of small diameter toward the viewpoint at the third toe wall, extends through the viewpoint by inserting a stranded wire along the horizontal perforation, and connects the third toe wall and the stranded wire Installing;
(c) connecting a strand extending to the viewpoint to a structure provided with the friction reducing device or the end shoe;
(d) towing the friction reducing device at predetermined intervals using the traction jack; And
(e) constructing the transverse structure by in-situ placement for the trailed predetermined spacing,
And (d) repeating the steps (d) to (e) in order to install the transverse structure through the ground. 6. The method of claim 5,
When the transverse structure is formed by spotting,
(a) installing a reaction force band in the viewpoint work space;
(b) extending the spacing member from the front of the reaction force band toward the friction reducing device;
(c) disposing a press-in jack between the rear of the friction reducing device and the spacing member; And
(d) actuating the press-in jack to move the friction reducing device forward by a predetermined distance using a reaction force, and performing a field installation behind the friction reducing device,
Wherein the steps (b) to (d) are repeated to install the transverse structure through the ground, wherein the steps (b) to (d) are repeated.

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