KR20220001505A - Method for constructing vertical structure in vertical tunnel using top down method - Google Patents

Abstract

The present invention relates to a method for constructing a vertical shaft structure using a top-down construction method in which construction is realized while a vertical shaft wall structure is lowered from the ground to the lower part of the vertical shaft at the same time when the vertical shaft is excavated. The method for constructing the vertical shaft structure using the top-down construction method according to the present invention comprises: a first step in which a temporary structure (100) is installed on the ground; a second step in which an underground structure is buried wherein the underground structure is composed of a precast concrete segment stacking assembly which is to be inserted into an excavation hole formed from the ground to the bedrock at a regular interval along an inner edge of the temporary structure; a third step in which a descending guide member (300) is installed on the upper part of the temporary structure; a fourth step in which a vertical shaft wall structure (B) is mounted on the descending guide member at the same time when the vertical shaft is excavated to a certain depth within the temporary structure; a fifth step in which the upper end of a support structure exposed upward to a certain depth is removed; a sixth step in which the descending guide member guiding the vertical shaft wall structure to descend to a certain depth into the vertical shaft; and a seventh step in which the fourth to the sixth step are repeated until the vertical shaft wall structure reaches a target depth. The present invention enables the vertical shaft wall structure to descend in a stably horizontal state.

Description

{Method for constructing vertical structure in vertical tunnel using top down method}

The present invention relates to a construction method of a vertical sphere structure using a top-down construction method in which construction is performed while the vertical sphere is excavated and the vertical sphere wall is lowered from the ground to the lower part of the vertical sphere at the same time.

In general, a vertical tunnel is a type of vertical tunnel that connects vertically from the ground to the underground tunnel to excavate the tunnel. During tunnel construction, various equipment and construction materials are transported and moved from the ground, and the soil and rock generated during tunnel excavation are discharged to the ground. After the tunnel is completed, it connects various cables of the manager's movement path, communication area, and electric power outlet from the underground tunnel to the ground, and also plays a role of connecting various pipes.

These vertical spheres are constructed through the traditional method of installing a temporary retaining wall at the outer part after excavation, and constructing it from the bottom of the basement to the upper side while supporting the load applied to the temporary retaining wall as a brace. There are many problems in applying the above construction method when the building is located close to the site boundary, such as in a large city, because it causes traffic jams and damages the surrounding area due to vehicle stopping. Since various problems such as the complexity of the process, the risk of work, and the generation of waste occur due to the construction of the structure, the top-down method (Top-Down Method) that is fast, economical, and structurally safe while increasing land use efficiency has recently been used. ) is in the spotlight.

As a construction method of a vertical sphere structure using a top-down construction method, "the construction method of a vertical sphere structure using a top-down construction method" disclosed through Patent No. 1859367 is known.

The method of constructing a vertical sphere structure using the conventional top-down construction method described above is to install a temporary structure on the ground, install a temporary pedestal on the temporary structure, and then excavate the vertical sphere from the inside of the temporary structure and simultaneously construct it through the temporary structure. 1 Mold a vertical ball wall. And the first vertical sphere wall is lowered to a certain depth into the vertical sphere, and a second vertical sphere wall is formed on the upper end of the first vertical sphere wall. And it is to construct a vertical sphere structure by a method of lowering the second vertical sphere wall together with the first vertical sphere.

However, according to the construction method of the vertical sphere structure using the conventional top-down construction method, when the ground of the vertical sphere is weak, the descending vertical sphere walls do not achieve a horizontal state and are inclined to one side.

In this case, since it is necessary to adjust the position of the inclined vertical sphere wall in a horizontal state, various problems such as delay of air and occurrence of safety accidents occur.

In addition, as the vertical sphere wall is tilted, cracks often occur by colliding with the vertical sphere wall. As groundwater flows in, it is very urgent to prepare countermeasures.

Korean Patent Publication No. 1859367

The present invention has been devised to solve the above problems, and the purpose of the present invention is to provide a construction method of a vertical sphere structure using a top-down construction method in which descending vertical sphere walls are stably descended while maintaining a horizontal state without inclining to one side. have.

In order to achieve the above object, the present invention

The present invention configured as described above has the effect of being able to descend while stably maintaining the horizontal state without inclining to one side to the target depth because the vertical sphere wall is always supported in a horizontal state through the embedded support structure.

1 and 2 are cross-sectional views sequentially showing a construction method of a vertical sphere structure using a top-down construction method according to an embodiment of the present invention.
Fig. 3 is a plan view of Fig. 2;
4 is a cross-sectional view sequentially showing a construction method of a vertical sphere structure using a top-down construction method according to an embodiment of the present invention, showing a state in which a descending guide member is installed in a temporary structure.
5 to 7 are cross-sectional views sequentially showing a construction method of a vertical sphere structure using a top-down construction method according to an embodiment of the present invention.
8 is a cross-sectional view showing a construction method of a vertical sphere structure using a top-down construction method according to another embodiment of the present invention.
9 is an exploded perspective view of the precast concrete segment of FIG.
10 and 11 are cross-sectional views sequentially showing a construction method of a vertical sphere structure using a top-down construction method according to another embodiment of the present invention.
12 is an exploded perspective view of a precast concrete segment according to another embodiment of the present invention.
13 and 14 are cross-sectional views sequentially showing a construction method of a vertical sphere structure using a top-down construction method according to another embodiment of the present invention.

The features and advantages of the present invention will become more apparent from the following detailed description of preferred embodiments, taken in conjunction with the accompanying drawings.

Prior to this, the terms or words used in the present specification and claims are based on the technical idea of the present invention based on the principle that the inventor can appropriately define the concept of the term in order to best describe his invention. It must be interpreted with a corresponding meaning and concept.

In addition, the terms or words used in the specification and claims are used only to describe specific embodiments, and are not intended to limit the present invention.

For example, the singular expression includes the plural expression unless the context clearly dictates otherwise. In addition, terms such as “comprises” or “comprising” or “having” are intended to designate the presence of a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more It should be understood that this does not preclude the possibility of addition or existence of other features or numbers, steps, operations, components, parts, or combinations thereof.

In addition, when a part of a layer, film, region, plate, etc. is said to be "on" another part, this includes not only the case where it is "directly on" another part, but also the case where there is another part in between. Conversely, when a part of a layer, film, region, plate, etc. is said to be "under" another part, this includes not only cases where it is "directly under" another part, but also a case where another part is in between.

In addition, terms including an ordinal number, such as "first", "second", etc. used herein may be used to describe various elements, but the elements are not limited by the terms, and the terms are It is used only for the purpose of distinguishing one component from another.

Hereinafter, in describing an embodiment of the present invention in detail with reference to the drawings, the same reference numerals are used for the same components, and only different parts are mainly described so as not to overlap as much as possible for clarity.

As shown in FIG. 1 , a temporary structure 100 is installed on the ground where the vertical sphere structure is to be constructed.

The temporary structure 100 provides a solid floor surface so that a series of operations on the ground can be smoothly performed.

The temporary structure 100 is formed in a ring shape along the vertical sphere to be excavated and has an inner diameter greater than the vertical sphere to be excavated. The temporary structure 100 may be an assembly of a cast-in-place concrete structure or a precast concrete segment 210 .

2 and 3 , when the installation of the temporary structure 100 is completed, the supporting structures are buried at regular intervals along the inner edge of the temporary structure 100 .

In this case, the support structures may be concrete piles 200a formed by forming an excavation hole from the ground to the rocky ground (A) and pouring concrete into the excavation hole in order to exert a strong bearing force.

As shown in FIG. 4 , when the burial of the concrete pile 200a is completed, the descending guide member 300 is installed on the temporary structure 100 .

The descending guide member 300 includes a hydraulic jack 310 installed on the upper part of the temporary structure 100 , a shoe 320 supported on the upper end of the concrete pile 200a, and the hydraulic jack 310 and a shoe 320 . ) and a jack rod 330 for directly connecting the shoe 320, and a lifting member 340 installed at the lower portion of the shoe 320.

The lifting member 340 is preferably a hydraulic cylinder that can exert a large driving force, can be easily installed, and can be precisely controlled.

As shown in FIG. 5A , when the installation of the descending guide member 300 on the upper part of the temporary structure 100 is completed, equipment such as a fork crane is put into the interior of the temporary structure 100 to excavate a vertical sphere to a certain depth. At the same time, the vertical sphere wall (B) is mounted on the upper portion of the shoe (320).

In this case, the vertical sphere wall (B) may be a precast concrete structure or a concrete structure cast on site from the upper portion of the shoe 320 . The jack rod 330 is connected through the vertical sphere wall (B).

In this way, since the vertical sphere wall (B) is prepared while the excavation of the vertical sphere is in progress, it is possible to significantly shorten the air.

In addition, since the shoe 320 is stably supported in a horizontal state by the concrete pile 200a buried up to the bedrock ground (A), the vertical sphere wall (B) mounted on the upper part of the shoe 320 is also high in spite of the high load. and keep the horizontal state stably without inclining to one side.

Although not shown, when the top height of the buried concrete piles 200a is not constant, the shoe 320 is inclined to one side and the vertical sphere wall B cannot be supported in a horizontal state, so the concrete pile 200a ), a height adjustment block for adjusting the height so that all the elevating members 340 are positioned on the same horizontal line may be further provided at the upper end.

On the other hand, when the vertical sphere is excavated to a certain depth, the upper portion of the concrete pile 200a supporting the lifting member 340 is exposed at a certain height.

As shown in Figure 5b, when the excavation of the vertical sphere and the mounting of the vertical sphere wall (B) are completed, the top of the concrete pile 200a exposed upward by a certain depth is removed.

That is, the upper end of the concrete pile 200a exposed upward is cut using a cutter, and then the upper end of the cut concrete pile 200a is pulled to the vertical spherical side to remove it from the concrete pile 200a.

This cutting operation is performed sequentially for each concrete pile 200a. Whenever the top of the concrete pile 200a exposed to the upper part is removed, the lifting member 340 of the corresponding descending guide member 300 is lowered to lower the concrete pile. By making it supported on the cut upper surface of (200a), the support of the vertical sphere wall (B) is made stable without change.

5c and 5d, when the top of all concrete piles 200a are removed in this way, the vertical sphere wall B is lowered to a certain depth by using the descending guide member 300.

That is, when all the lowered lifting members 340 are raised at the same time, the vertical sphere wall B naturally descends to a certain depth into the vertical sphere by the weight of the vertical sphere wall B.

At this time, if the lower end of the lifting member 340 is fixed to the cut upper surface, the lifting member 340 acts to pull the shoe 320, so that the vertical sphere wall B is lowered more easily.

As shown in FIG. 6, in the same way as above, until the vertical sphere wall (B) reaches the target depth, the vertical sphere is excavated to a certain depth and the vertical sphere wall (B) is placed on the descending guide member 300 After mounting, the top of the concrete pile 200a exposed upward by a certain depth is removed, and the process of lowering the vertical sphere wall B into the vertical sphere by a predetermined depth is repeated.

After that, the shoe 320 and the elevating member 340 are removed, concrete is poured on the bottom of the vertical sphere to construct the floor surface (C), and then the descending guide member 300 and the temporary structure 100 installed on the ground are removed. When the gap (D) is filled by pouring concrete on the vertical sphere and the vertical sphere wall, the construction of the vertical sphere structure is completed as shown in FIG. 7 .

As described above, in the present invention, since the vertical sphere wall (B) is supported in a horizontal state through the embedded concrete pile (200a), the vertical sphere wall (B) is stably descended to the target depth while maintaining the horizontal state without inclining to one side. will do

8 and 9, as another embodiment of the present invention, the support structures may be a precast concrete segment lamination assembly 200b that is inserted into an excavation hole formed from the ground to the rocky ground (A). .

In this case, when the coupling protrusions 211 in which the pin fitting holes 212 are formed at the top and bottom of the precast concrete segments 210 respectively protrude in the inner direction of the vertical sphere, the upper precast concrete segment 210 of the The pin 220 is inserted into the pin fitting hole 212 formed at the lower end and the pin fitting hole 212 formed at the upper end of the precast concrete segment 210 at the bottom, and the lower part of the pin 200 so that the pin 220 does not fall out. The precast concrete segments 210 can be joined very easily by inserting the Ÿ‡ paper 230 in the .

In addition, it is preferable that a sliding groove portion 240 is formed in the inner direction of the vertical sphere at the lower end of the precast concrete segments 210 , and a sliding protrusion 250 corresponding to the sliding groove portion 240 is formed at the upper end thereof.

In this case, after the pin 220 is separated from the pin fitting hole 212 , the upper precast concrete segment 210 can be easily removed from the precast concrete segment lamination assembly 200b.

As shown in FIG. 10 , in the case where the support structure is a precast concrete segment laminate assembly 200b, when the descending guide member 300 is installed, the lifting member 340 is free It is supported on top of the cast concrete segment lamination assembly 200b.

And, when removing the upper end of the concrete segment lamination assembly 200b exposed upward by a certain depth, as shown in FIG. 11A , the lifting member 340 is raised by one stage, and then the precast concrete exposed upwards. The segment 210 is separated and removed from the precast concrete segment lamination assembly 200b.

11B, the removal operation of the precast concrete segment 210 is sequentially performed for each precast concrete segment lamination assembly 200b, and the precast concrete segment 210 exposed to the top is removed. Whenever. By lowering the lifting member 340 raised by one stage in two stages to be supported on the separated upper surface of the precast concrete segment lamination assembly 200b, the support of the vertical sphere wall B is made stable without change.

11c, when all the precast concrete segments 210 exposed upward in this way are removed, the vertical sphere wall B is lowered to a certain depth using the descending guide member 300.

That is, as shown in FIG. 11D , when all the lifting members 340 lowered in two stages are contracted to one stage at the same time, the vertical sphere wall B naturally moves into the vertical sphere by the weight of the vertical sphere wall B. It will descend to a certain depth.

At this time, if the lower end of the lifting member 340 is fixed to the separated upper surface, the lifting member 340 pulls the shoe 320 so that the vertical sphere wall B is lowered more easily.

In the same way as above, until the vertical sphere wall (B) reaches the target depth, the vertical sphere is excavated to a predetermined depth, and the vertical sphere wall (B) is mounted on the descending guide member 300, and then by a predetermined depth. If the precast concrete segment 210 exposed to the top is removed and the process of lowering the vertical sphere wall B to a certain depth into the vertical sphere is repeated, the construction of the vertical sphere structure is completed as shown in FIG. 8 . .

As shown in FIG. 12, as another embodiment of the present invention, in the case of a precast concrete segment lamination assembly 200c, the support structures are inserted into the excavation hole formed from the ground to the rocky ground (A), A first pin member 341 is vertically provided at a lower end of the lifting member 340, and a vertical pinhole 261 into which the first pin member 341 is inserted is provided at an upper end of the precast concrete segments 260. A horizontal pinhole 262 communicating with the vertical pinhole 261 may be formed at a side thereof.

In this case, the horizontal pin hole 262 is inserted into the first pin member 341 and coupled, and the second pin member 270 is inserted into the horizontal pin hole 262 . The end of the second pin member 270 is exposed to the outside of the horizontal pinhole 262 , and a Ÿ‡ paper 280 is inserted into the exposed end of the second pin member 270 to the second pin member 270 . prevents the flow of

In addition, a protrusion 264 is formed at the lower end of the precast concrete segments 260 and a groove portion 263 corresponding to the protrusion 264 is formed at the upper end of the precast concrete segment 260 in the upper part and the precast concrete segment 260 in the lower part. The cast concrete segments 260 may be stably coupled at a predetermined position.

On the other hand, it is preferable that the lower end of the precast concrete segment 260a located at the lowermost end of the precast concrete segments 260 has a sharp part 265 converging to the lower side.

In this case, the sharp part 265 is deeply embedded in the bottom surface of the excavation hole by the load of the precast concrete segments 260 stacked thereon, and the precast concrete segment lamination assembly 200c inside the excavation hole is in a stable posture. help to be buried with

13, when the precast concrete segment 260 is configured as described above, when the descending guide member 300 is installed, the elevating member 340 is lowered by one stage and the precast concrete segment is laminated. It is fixed to the top of the assembly (200c).

And, when removing the upper end of the concrete segment lamination assembly 200c exposed upward by a certain depth, as shown in FIG. 14A , when the lifting member 340 is raised by one stage, the uppermost part along the lifting member 340 is removed. The precast concrete segment 260 is lifted, and the lifted uppermost precast concrete segment 260 is separated from the lifting member 340 and removed.

As such, in this embodiment, since the elevating member 340 is removed in a manner to lift the precast concrete segment 260 , no separate equipment is required to remove the precast concrete segment 260 , and the removal operation is very easy and quick proceeds

As shown in FIG. 14B , the removal operation of the precast concrete segment 260 is sequentially performed for each precast concrete segment lamination assembly 200c, and the precast concrete segment 260 exposed to the top is removed. Whenever. By lowering the lifting member 340 raised by one stage in two stages and fixing it to the precast concrete segment 260, the support of the vertical sphere wall B is made stably without change.

As shown in Fig. 14c, when all the precast concrete segments 260 exposed upward in this way are removed, the vertical sphere wall B is lowered to a certain depth by using the descending guide member 300.

That is, as shown in FIG. 14D , when all the lifting members 340 lowered in two stages are contracted to one stage at the same time, the vertical sphere wall B naturally moves into the vertical sphere by the weight of the vertical sphere wall B. It will descend to a certain depth.

In the same way as above, until the vertical sphere wall (B) reaches the target depth, the vertical sphere is excavated to a predetermined depth, and the vertical sphere wall (B) is mounted on the descending guide member 300, and then by a predetermined depth. If the precast concrete segment 260 exposed to the top is removed and the process of lowering the vertical sphere wall B to a certain depth into the vertical sphere is repeated, the construction of the vertical sphere structure is completed as shown in FIG. 8 . .

In this way, the support structure is a precast concrete segment laminate assembly (200b, 200c) In this case, compared to the above-described concrete pile (200a), recycling is possible, and there is an advantage in that the removal is quick and easy.

As such, although preferred embodiments of the present invention have been described above with reference to the drawings, the present invention is not limited to the above-described embodiments, and those skilled in the art to which the present invention pertains can modify without departing from the spirit of the present invention It is possible, and such modifications will fall within the scope of the present invention.

100...Temporary structure 200a...Concrete pile
200b, 200c...Precast Concrete Segment Laminate Assemblies
210,260...precast concrete segments
211...Joint projection 212...Pin fitting hole
220...pin 240...sliding groove
250...sliding protrusion 261...vertical pinhole
262...horizontal pinhole 263...groove
264...the stone part 265...the sharp part
270...Second pin member 280...Ÿ‡ paper
300...Descent guide member 310...Hydraulic jack
320...Shoe 330...Jack Rod
340...Elevating member 341...First pin member
A...rock ground B...vertical wall

Claims (6)

A first step in which a temporary structure is installed on the ground, and a second step in which a support structure composed of a precast concrete segment lamination assembly inserted into an excavation hole formed from the ground to a rocky ground at regular intervals along the inner edge of the temporary structure is buried A descending guide member having a hydraulic jack installed on the upper part of the temporary structure, a shoe supported on the upper end of the support structure, a jack rod connecting the hydraulic jack and the shoe, and a lifting member installed under the shoe is installed. A third step of becoming a vertical sphere is excavated to a predetermined depth within the temporary structure and a fourth step of mounting a vertical sphere wall on the descending guide member at the same time, and the upper end of the support structure exposed upward by a predetermined depth is removed A fifth step of becoming, a sixth step of the descending guide member lowering the vertical sphere wall to a predetermined depth into the vertical sphere, and the fourth to sixth steps until the vertical sphere wall reaches a target depth a repeated seventh step;
In the third step, the lifting member of the descending guide member is fixed to the upper end of the precast concrete segment lamination assembly in a one-step lowered state;
The fifth step is lifting the fixed precast concrete segment while the lifting member rises by one stage, the lifted precast concrete segment is separated from the lifting member and removed, and the precast concrete segment is removed from the precast concrete segment. The step of supporting the lifting member while descending in two stages on the separated upper surface of the precast concrete segment lamination assembly is sequentially performed for each precast concrete segment lamination assembly;
The sixth step is a construction method of a vertical sphere structure using a top-down construction method comprising the step of shrinking all the lifting members lowered in two stages to one stage. According to claim 1,
The lifting member is a construction method of a vertical sphere structure using a top-down construction method, characterized in that the hydraulic cylinder. According to claim 1,
A method of constructing a vertical sphere structure using a top-down construction method in which a height adjustment block is further provided at the upper end of the support structure to adjust the height so that all the lifting members are positioned on the same horizontal line. According to claim 1,
A first pin member is vertically provided at the lower end of the elevating member,
A vertical pinhole into which the first pin member is inserted is formed at an upper end of the precast concrete segments,
Horizontal pinholes communicating with the vertical pinholes are formed on the sides of the precast concrete segments,
A second pin member is inserted into the horizontal pin hole and coupled to the first pin member,
The end of the second pin member is exposed to the outside of the horizontal pinhole,
The exposed end of the second pin member is a construction method of a vertical sphere structure using a top-down method in which the Ÿ‡ paper that blocks the flow of the second pin member is inserted and coupled. According to claim 1,
A method of constructing a vertical sphere structure using a top-down construction method in which protrusions are formed at the lower ends of the precast concrete segments and grooves corresponding to the protrusions are formed at the upper ends. The method of claim 1,
The lower end of the precast concrete segment located at the lowest among the precast concrete segments is a construction method of a vertical sphere structure, characterized in that it consists of a sharp part converging to the lower part.

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