KR102146073B1 - Slip form for the construction of a vertical shaft with varying cross-section and the construction method - Google Patents

Abstract

The present invention relates to a slip form used in constructing a vertical shaft with a varying cross section having a planar cross section with a portion becoming smaller by forming a protruding unit on the inside of an inner wall, and a construction method of a vertical shaft with a varying cross section using the same. The slip form used in the present invention is formed in a planar shape corresponding to the cross section of a vertical shaft excluding the protruding unit, and includes a plurality of hydraulic jacks for lifting a slip form on a main surface unit coming in contact with an excavation surface, one or more lifting rings on an end other than the main surface unit coming in contact with the excavation surface to be connected to a lifting device above by a cable, and a coupling unit on the end other than the main surface unit coming in contact with the excavation surface to be coupled to an auxiliary slip form to simultaneously operate and lift the hydraulic jacks and the lifting device to maintain balance even when lifted. According to the present invention, the construction method of a vertical shaft comprises: (1) a step A of depositing bottom concrete on the lower surface of an excavation hole; (2) a step B of depositing on-site deposition concrete to construct a protruding unit after installing a form; (3) a step C of placing a main slip form formed in a planar shape corresponding to the cross section of a vertical shaft excluding the protruding unit and provided with a plurality of hydraulic jacks for lifting a slip form on a main surface unit coming in contact with an excavation surface and one or more lifting rings on an end other than the main surface unit coming in contact with the excavation surface on an upper portion of the bottom concrete; (4) a step D of coupling a cable to the lifting rings and connecting the lifting rings to a lifting device above; and (5) a step E of simultaneously operating the hydraulic jacks and the lifting device to form a vertical shaft with the protruding unit while ascending in a state in which the balance of the main slip form is maintained.

Description

Slip form for the construction of a vertical shaft with varying cross-section and the construction method}

The present invention relates to a slip foam used for construction of a vertical vertical sphere having a portion having a small plane cross-section due to a protrusion formed inside the inner wall, and a method of constructing a vertical vertical sphere using the same.

In recent years, as the construction of deep tunnels using underground spaces in downtown areas or common areas to accommodate public facilities has increased for the three-dimensional development of cities, construction of a vertical shaft as a maintenance passage and ventilation port after construction during construction Cases are increasing.

Such a vertical hole excavates the excavation hole in the vertical direction from the ground, pours concrete on the bottom of the excavation hole to form the bottom surface, and then installs a formwork along the inner circumferential surface of the excavation hole from the bottom of the excavation hole and pours concrete. It is constructed in the order of forming a vertical wall by repeating the process.

In forming the vertical wall of the vertical sphere, in the past, the formwork was installed at the location where the vertical wall was formed, and after concrete was poured, the formwork was dismantled, reassembled and installed at the next working location, and then concrete was poured. Was used, but recently the slip foam method is widely used.

Slip form refers to a form applied to the construction method of completing a structure by continuously assembling reinforcing bars and pouring concrete while raising the formwork upward when the strength of concrete becomes more than the strength that can stand on its own after pouring concrete. The slip foam is generally composed of an upper workbench, an intermediate workbench, and a lower workbench, and a vertical wall is constructed while moving vertically by a hydraulic jack arranged on the main surface.

The slip form method is advantageous for forming a vertical sphere with a constant cross section, but the horizontal tunnel is connected to the inside of the vertical tunnel, so if the end of the horizontal tunnel has a protrusion protruding into the vertical tunnel, the cross section of the vertical sphere is It is difficult to apply the slip foam method right away because there is a changeable part.

1A is a cut-away perspective view of a vertical sphere with a protrusion, and FIG. 1B is a vertical cross-sectional view of a vertical sphere with a protrusion formed inside the inner wall. While the vertical sphere 1 is connected to the horizontal connection tunnel 2, the horizontal connection tunnel 2 The end portion is located inside the inner wall of the vertical sphere (1) is a structure in which the protrusion 21 is formed inside the vertical sphere.

In the section where the protrusion is formed, since the vertical sphere wall cannot be formed using a normal slip foam having a planar shape corresponding to the cross section of the vertical sphere, the traditional formwork method is used in the section where the protrusion is located. The cost reduction effect or cost reduction effect due to the selection will be reduced.

In addition, in the section where the protrusion is formed, even if the slip form method is applied to form walls other than the protrusion, the end of the slip foam that is not supported by the hydraulic jack and jack rod is the weight of the slip foam and various materials loaded on the slip foam work table. Due to the weight, sagging occurs and it is difficult for the slip form to rise while maintaining a horizontal state, which affects the verticality of the vertical sphere as well, which deteriorates the construction quality.

Registered Patent Publication No. 10-1679180 Construction method of vertical ventilation Registered Patent Publication No. 10-1737193 Vertical tunnel structure and its construction method Registered Patent Publication No. 10-0913381 Slip form for vertical tunnel structure and construction method of underground vertical tunnel structure using the same Registered Patent Publication No. 10-2001526 Vertical sphere press-in device for top-down construction method and vertical sphere construction method using the same

In the present invention, a protrusion is formed inside the inner wall of the vertical sphere, so that even in the side vertical sphere where the plane cross section of the vertical sphere is small, the slip foam for continuous construction and the construction method of the side vertical sphere using the same It is to provide.

One object of the present invention is to maintain the vertical state of the vertical sphere formed by the slip foam by maintaining the balance of the slip foam even in the rising process of the slip foam.

In addition, one object of the present invention is to allow the end of the slip foam not equipped with a hydraulic device to be connected to the lifting device in various ways, so that the optimal lifting method can be selected according to the situation of the construction site. In addition, one object is to be able to adjust the verticality of the cable connecting the lifting hook and the lifting device by adjusting the length of the lifting bracket.

In addition, one object of the present invention is to make it possible to assemble the slip foam on the upper surface of the protrusion so that the slip foam corresponds to the plane cross section of the entire vertical sphere, thereby enabling continuous construction of the vertical sphere even when the cross section of the vertical sphere changes. To do.

This object of the present invention is formed in a planar shape corresponding to the cross section of the vertical sphere excluding the protrusion, and a plurality of hydraulic jacks for lifting the slip foam are provided on the main surface part in contact with the excavation surface, and ends other than the main surface part in contact with the excavation surface Is provided with one or more lifting rings on the upper part and connected by cables, and at the ends other than the main surface part in contact with the excavation surface, the vertical ball can be combined with the sub-slip foam in the area where the plane cross section extends. By the slip foam provided with a coupling part, the hydraulic jack and the lifting device are simultaneously operated and lifted so that the balance is maintained even when ascending.

In addition, it is formed in a flat shape corresponding to the cross section of the vertical sphere excluding the protrusion, and a plurality of hydraulic jacks for lifting the slip foam are provided on the main surface in contact with the excavation surface, and one or two or more ends other than the main surface in contact with the excavation surface. A main slip foam provided with a lifting ring and connected by a lifting device and a cable at the top, and having a coupling portion for coupling with the sub slip foam in an area in which the vertical plane cross-section extends at an end other than the main surface portion in contact with the excavation surface; It is formed in a planar shape corresponding to the protrusion, and is provided with a plurality of hydraulic jacks for increasing the slip foam on the main surface in contact with the excavation surface, and is assembled by being connected to the coupling part of the main slip foam at the ends other than the main surface in contact with the excavation surface. Consisting of, the main slip foam and the sub slip foam are assembled and coupled to enable continuous construction of the vertical sphere even in the area where the cross section is expanded.

And, since the lifting device can be fixed to any of the crane outside the drilling hole, the beam crossing the entrance of the drilling hole, the lifting bracket fixed to the drilling surface, or the lifting bracket fixed on the upper part of the protrusion, the working method according to the site situation You can choose. In particular, the lifting bracket fixed to the excavation surface or the lifting bracket fixed on the upper part of the protrusion includes a horizontal pipe body with one or more adjustment holes, a slide body having a plurality of coupling holes and inserted into the horizontal pipe body, and the adjustment hole and slide of the horizontal pipe body. It is composed of bolts and nuts to fix the horizontal pipe body and the slide body by penetrating through the coupling hole of the sieve, and because the length of the slide body inserted into the horizontal pipe body can be adjusted, the verticality of the cable connecting the lifting ring and the lifting device is reduced. Can be easily adjusted.

The present invention has the effect of maintaining a constant verticality of a vertical sphere formed by the slip foam, since it is possible to maintain an equilibrium without sagging at the end of the slip foam even in the rising process of the slip foam.

In addition, the present invention selectively connects the end of the slip foam not provided with a hydraulic device to one of a crane outside the drilling hole, a beam crossing the entrance of the drilling hole, a lifting bracket fixed to the drilling surface, or a lifting bracket fixed on the top of the protrusion. Because it can be combined, there is an advantage of being able to select a working method according to the site situation.

In particular, since the lifting bracket fixed to the excavation surface or the lifting bracket fixed on the upper part of the protrusion is composed of a horizontal pipe body and a slide body, there is an effect that the verticality of the cable connecting the lifting hook and the lifting device can be easily adjusted.

And in the section in which the cross section of the vertical sphere is extended, the main slip foam and the sub slip foam are assembled to form a slip foam corresponding to the expanded vertical sphere cross section, thereby enabling continuous vertical sphere construction.

Fig. 1a a cutaway perspective view of a vertical sphere formed with a protrusion
Figure 1b vertical cross-sectional view of a vertical sphere formed with a protrusion
Fig. 2a A plan view of an intermediate working table in an exploded state of the main slip foam and the sub slip foam
Fig. 2b A cross-sectional view of the main slip foam and the sub slip foam in an exploded state
Fig. 3a A plan view of an intermediate working table in a state in which the main slip foam and the sub slip foam are combined
Figure 3b cross-sectional view of a state in which the main slip foam and the sub slip foam are combined
Fig. 4 Detailed view of the joint part of the main slip foam and the sub slip foam
Figure 5 Cross-sectional view of an embodiment in which a lifting device is fixed to a crane outside the excavation hole
Figure 6 A cross-sectional view of an embodiment in which the lifting device is fixed to the beam crossing the entrance of the excavation hole
Fig. 7 Flow chart of construction of a vertical tool on the side of a side according to an embodiment in which a lifting device is fixed to a lifting bracket fixed to the excavation surface
Fig. 8 Flow chart of construction of a vertical hole on the side of the side according to the embodiment in which the lifting device is fixed to the lifting bracket fixed on the upper part of the protrusion
Figure 9 Side view of a lifting bracket fixed to the excavation surface
Fig. 10 Side view of a lifting bracket fixed on the upper part of the protrusion

According to the present invention, the slip foam used in the construction of a vertical ball having a small plane cross-section may be largely composed of a main slip foam and a sub slip foam, as shown in FIGS. 2A and 2B.

The main slip foam 4 is formed in a planar shape corresponding to a cross section of a vertical sphere excluding the protrusion 21; A plurality of hydraulic jacks 41 for increasing the slip foam are provided on the main surface portion in contact with the excavation surface 3; One or two or more lifting rings 42 are provided at ends other than the main surface portion in contact with the excavation surface, and are connected by the lifting device 44 and the cable 45 at the top; An end portion other than the main surface portion in contact with the excavation surface 3 is provided with a coupling portion 43 for engaging with the sub-slip foam in an area in which the vertical plane cross-section extends.

When the main slip foam is raised, the hydraulic jack 41 and the lifting device 44 are simultaneously operated, so that even when the main slip foam is raised, the main surface portion or the end portion of the slip foam does not sag and the balance can be maintained.

The sub-slip foam 5 is formed in a planar shape corresponding to the protrusion, and a plurality of hydraulic jacks 51 for lifting the slip foam are provided on the main surface portion in contact with the excavation surface 3, and other than the main surface portion in contact with the excavation surface. It can be assembled by being connected to the coupling portion 43 of the main slip foam at the end.

For convenience of explanation, it is divided into a main slip foam (4) and a sub slip foam (5), but in the case of the main slip foam (4), it can be used for vertical wall construction even when not combined with the sub slip foam (5). Because it can be used, it can be used at the construction site as an independent slip foam. That is, in the construction of the section in which the protrusion 21 is formed inside the vertical sphere, it is not combined with the sub-slip foam 5, and a wall other than the protrusion can be continuously constructed in the upward direction. As an independent slip foam, it can be used for wall construction.

In addition, in general, since the intermediate working table of the slip foam maintains the rigidity of the slip foam, it has been shown that the lifting hook and the coupling part are provided on the intermediate working table of the slip foam, but the lifting hook and the coupling part can be limited only to the intermediate working table. no.

3A and 3B show a state in which the main slip foam and the sub slip foam are assembled and combined.

After the construction of the section in which the protrusion 21 is formed in the vertical sphere is completed, the sub-slip foam 5 is assembled with the main slip-form 4 to continuously construct the wall of the section whose cross section is expanded.

Figure 4 shows the coupling portion of the main slip foam and the sub slip foam. The coupling portion 43 of the main slip foam 4 is composed of a plurality of connecting hardware provided from the end of the main slip foam toward the outer circumferential surface. In a state where the end of the sub-slip form 5 is positioned on the coupling part 43 of the main slip form 4, the flange or the web at the end of the sub-slip form is fixed to each other in the coupling part.

In FIG. 4, it is assumed that the bolt and the nut are fastened, and the fastening hole is formed. However, welding or other fastening means may be used in addition to this. However, after the main and sub-slip foams are assembled, they must function as a single integrated slip foam, so that the coupling portion 43 of the main slip-form 4 and the end of the sub-slip foam 5 remain even after assembly. It is natural that the assembly should be combined to ensure sufficient rigidity.

After assembling the main slip foam (4) and the sub slip foam (5) into one body, the connection between the lifting hook 42 and the cable 45 of the main slip foam 4 is released, and the main slip foam 4 A wall is constructed while rising by the operation of the hydraulic jack 41 provided on the main surface of the) and the hydraulic jack 51 provided on the main surface of the sub-slip form 5.

In the present invention, the main slip foam 4 is raised by the hydraulic jack 41 and the lifting device 44 when constructing the wall of the section in which the protrusion is formed, and the lifting device is the lifting ring 42 of the main slip foam and It is connected by a cable 45.

In order to increase the efficiency of the lifting device while maintaining the vertical state of the slip foam, it is preferable that the lifting device 44 is positioned vertically above the lifting ring 42.

The lifting device 44 may be installed on the crane 6 outside the excavation hole. 5 shows an embodiment in which a lifting device is installed on a crane equipment located outside the excavation hole.

The lifting device 44 may be installed on the horizontal beam 7 crossing the entrance of the excavation hole. 6 shows an embodiment in which the lifting device is installed on the horizontal beam 7 crossing the entrance of the excavation hole.

The lifting device 44 may be installed on the lifting bracket 8 fixed to the excavation surface 3. 7A shows an embodiment in which a lifting device is installed on a lifting bracket 8 fixed to an excavation surface.

The lifting device 44 may be installed on the lifting bracket 9 fixed on the upper part of the protrusion 21. 8A shows an embodiment in which the lifting device is installed on the lifting bracket 9 fixed on the upper part of the protrusion.

When the lifting device is installed on the crane (6) equipment or on the horizontal beam (7), the length of the cable connecting the lifting device and the lifting hook becomes longer. Therefore, even when operating the hydraulic jack and the lifting device at the same time, Maintenance can be relatively difficult, and interference with the transport of rebar and materials to the slip form workbench can occur. Therefore, when the depth of the vertical sphere is relatively deep, it is preferable to install the lifting device on the lifting brackets 8 and 9 fixed on the excavation surface 3 or the protrusion 21.

The lifting brackets 8 and 9 are shown in FIGS. 9 and 10. The lifting brackets (8, 9) are horizontal pipe bodies (81, 91) in which one or more adjustment holes (84, 94) are formed and a plurality of coupling holes (85, 95) are formed, and the horizontal pipe bodies (81, 91) are Consisting of including slide bodies (82, 92) to be inserted, after the slide bodies (82, 92) are inserted into the horizontal pipe bodies (81, 91), the adjustment holes (84, 94) and the coupling holes (85, 95) After the bolt is fastened through it, the nut is combined and fixed. Since a plurality of coupling holes are formed in the slide bodies 82 and 92 in the longitudinal direction, it is easy to maintain the verticality of the cable connected to the lifting device 44. The lifting brackets 8 and 9 may further include supports 83 and 93 in an oblique direction for reinforcing the horizontal pipe, and a reinforcing member may be further provided at a lower portion of the horizontal pipe. Although the present invention has been described as being inserted into the horizontal pipe body, the horizontal pipe body without the slide body may be configured in the form of a steel bar.

When the lifting bracket is installed on the excavation surface (3) or the protrusion (21), it is combined with the anchor inserted into the excavation surface (3) or the protrusion (21), so that even when the lifting device is operated to raise the slip foam, the load To be fully supported.

A method of constructing a vertical sphere having a portion in which the plane cross-section of the vertical sphere is reduced by using the slip foam of the present invention will be described.

First, when the excavation of the excavation hole is completed, the floor concrete 10 is poured on the bottom of the excavation hole.

Next, the protrusion 21 is constructed by placing the cast-in-place concrete after installing the formwork.

Next, it is formed in a planar shape corresponding to the cross section of the vertical sphere excluding the protrusion 21, and a plurality of hydraulic jacks 41 for lifting the slip foam are provided on the main surface in contact with the excavation surface, and the main surface in contact with the excavation surface At the ends other than the part, the main slip foam 4 provided with one or more lifting rings 42 is placed on the top of the concrete floor 10.

Thereafter, the cable 45 is connected to the lifting ring 42 and the other end of the cable is connected to the lifting device 44 on the upper part. 7A and 8A illustrate a state in which the lifting ring 42 of the main slip foam 4 and the lifting device 44 on the upper part are connected by a cable 43.

At this time, the lifting device 44 may be installed on a crane 6 outside the excavation hole or a horizontal beam 7 crossing the entrance of the excavation hole. In addition, the lifting device 44 may be installed on either the lifting bracket 8 fixed to the excavation surface or the lifting bracket 9 fixed to the upper portion of the protrusion. When the lifting brackets (8, 9) include horizontal pipe bodies (81, 91) having one or more adjustment holes formed therein, and slide bodies (82, 92) having a plurality of coupling holes formed and inserted into the horizontal pipe body, the slide The verticality of the cable can be adjusted by adjusting the length of the sieve inserted into the horizontal tube.

After connecting the lifting hook 42 and the lifting device 44 with the cable 45, the hydraulic jack 41 and the lifting device 44 are simultaneously operated to raise the main slip form while maintaining the balance. As the main slip foam rises, the wall of the vertical sphere section with protrusions is constructed. 7B and 8B illustrate a state in which the wall is constructed while the main slip foam is raised by the hydraulic jack 41 and the lifting device 44.

After the wall of the vertical sphere section provided with the protrusion is constructed, it is formed in a planar shape corresponding to the protrusion at the upper part of the protrusion, and a plurality of hydraulic jacks 51 for lifting the slip foam on the main surface part in contact with the excavation surface 3 ) By lowering the provided sub-slip foam (5), and assemble the main and sub-slip foam integrally.

After assembling the main slip foam 4 and the sub slip foam 5, the cable 45 coupled to the lifting ring 42 is disconnected.

After that, while the integrally assembled slip foam is raised by hydraulic jacks 41 and 51 provided on the main surface, the wall of the vertical sphere is continuously constructed. Figures 7c, 7d and 8c, 8d shows a state in which the integrally assembled slip foam is raised by the hydraulic jacks 41 and 51 and the wall of the vertical sphere is continuously constructed.

As described above, a preferred embodiment of the present invention has been described above with reference to the drawings, but the present invention is not limited to the above-described embodiment. In particular, in the embodiment of the present invention, it has been described that the horizontal cross section of the vertical sphere is circular, but even in the case of a rectangular shape, any person skilled in the art can apply the present invention.

As such, a person having ordinary knowledge in the technical field to which the present invention pertains can be modified within the scope of the present invention, and such modifications will also fall within the scope of the present invention.

The present invention is used in the construction of a side vertical sphere having a portion with a smaller planar cross-section because a protrusion is formed inside the inner wall.

1: vertical hole 2: horizontal connection tunnel
3: Excavation surface 4: Main slip foam
5: sub-slip form 6: crane
7: Leveling beam 8: Lifting bracket fixed to the excavation surface
9: Lifting bracket fixed on the upper part of the protrusion 10: Concrete floor

Claims (10)

delete It is a slip foam used in the construction of vertical spheres having a small plane cross section due to the protrusion formed inside the inner wall.
It is formed in a planar shape corresponding to the cross section of the vertical sphere excluding the protrusion, and a plurality of hydraulic jacks for lifting the slip foam are provided on the main surface in contact with the excavation surface, and one or more lifts at the ends other than the main surface in contact with the excavation surface. A main slip foam provided with a ring and connected by a cable to the lifting device above, and having a coupling portion for coupling with the sub slip foam at an end portion other than the main surface portion in contact with the excavation surface in an area in which the vertical plane cross-section is extended;
It is formed in a planar shape corresponding to the protrusion, and a plurality of hydraulic jacks for lifting the slip foam are provided on the main surface portion in contact with the excavation surface, and the assembly is connected to the coupling portion of the main slip foam at an end other than the main surface portion in contact with the excavation surface. It consists of;
Slip foam for construction of vertical holes on the side of the cross section formed by assembling and combining the main and sub slip foams. The method according to claim 2,
The lifting device is a slip foam for construction of a vertical cross section, characterized in that it is installed on either a crane outside the excavation hole or a horizontal beam crossing the entrance of the excavation hole. The method according to claim 2,
The lifting device is a slip foam for construction of a vertical cross section, characterized in that it is installed in either a lifting bracket fixed to the excavation surface or a lifting bracket fixed to the upper portion of the protrusion. The method of claim 4,
The lifting bracket includes a horizontal tube having one or two or more adjustment holes;
A slide body having a plurality of coupling holes formed therein and inserted into the horizontal tube body;
Consisting of a bolt and a nut for fixing the horizontal pipe body and the slide body by penetrating the adjusting hole of the horizontal pipe body and the coupling hole of the slide body,
A slip foam for construction of a vertical cross section, characterized in that the length of the slide body inserted into the horizontal pipe body can be adjusted. This is a vertical sphere construction method with a portion that has a small plane cross-section due to the protrusion formed inside the inner wall.
(1) a step of pouring concrete floor on the bottom of the excavation hole;
(2) b step of constructing the protrusion by placing on-site concrete after installing the formwork;
(3) It is formed in a planar shape corresponding to the cross section of the vertical sphere excluding the protruding part, and a plurality of hydraulic jacks for lifting the slip foam are provided on the main surface in contact with the excavation surface, and one or more at the ends other than the main surface in contact with the excavation surface. Step c of placing the main slip foam provided with two or more lifting rings on the top of the concrete floor;
(4) step d of coupling the cable to the lifting ring and connecting it to the lifting device above;
(5) e step of forming a vertical sphere provided with a protrusion while the hydraulic jack and the lifting device are simultaneously operated to maintain the balance of the main slip form;
(6) At the top of the protrusion, it is formed in a planar shape corresponding to the protrusion, and a plurality of hydraulic jacks for lifting the slip foam are provided on the main surface part in contact with the excavation surface, and the main surface at the ends other than the main surface part in contact with the excavation surface. F step of assembling the main slip foam and the sub slip foam integrally by lowering the sub slip foam to be assembled by being connected to the coupling portion of the slip foam;
(7) step g of disconnecting the cable coupled to the lifting ring of the main slip foam;
(8) step h of forming a vertical sphere while raising the integrally assembled slip foam by a hydraulic jack provided on the main surface of the main and sub-slip foams; a vertical vertical ball construction method comprising a. The method of claim 6,
In the step d, the lifting device is installed on a crane outside the excavation hole or a horizontal beam crossing the entrance of the excavation hole. The method of claim 6,
In the step d, the lifting device is installed on either a lifting bracket fixed to the excavation surface or a lifting bracket fixed on the upper part of the protrusion. The method of claim 8,
The lifting bracket may include a horizontal tube having one or two or more adjustment holes;
A slide body having a plurality of coupling holes formed therein and inserted into the horizontal tube body;
Consisting of a bolt and a nut for fixing the horizontal pipe body and the slide body by penetrating the adjusting hole of the horizontal pipe body and the coupling hole of the slide body,
A method of constructing a vertical cross section comprising the step of adjusting the verticality of the cable by adjusting a length in which the slide body is inserted into the horizontal pipe body. delete

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