KR102484762B1 - Improvement down-up equipment of construction of the underground structure - Google Patents

Abstract

Disclosed in the present invention is improvement down-up equipment of an underground structure, which facilitates ease in the construction of a basement floor slab with respect to an underground structure by the motion of allowing a truss support body, which supports the basement floor slab by concrete placement, to descend step by step, facilitates ease in the separation work between the placed basement floor slab and a mold, and significantly improves workability by enabling fine adjustment by means of a hydraulic pressure. As the descent of the truss support body is performed by the hydraulic pressure, the descent may be easily performed. Furthermore, the truss support body may be solidly fixed at a vertical beam to solidly support the load strength caused by the concrete placement. Moreover, the truss support body may be solidly supported with the wall body beam, and the truss support body may be easily dislocated from the wall body beam, thereby significantly increasing convenience in work and solidity. Consequently, the load of the placed concrete may be solidly supported, and the truss support body may be supported with a double structure by a hydraulic jack and a reinforcing hydraulic jack, thereby solidly supporting the truss support body when the concrete is placed and when the truss support body descends. To this end, the present invention comprises: a truss support; a wale unit; a column lower bracket; and a hydraulic driving body.

Description

Improvement down-up equipment of construction of the underground structure}

The present invention relates to an improved down-up device for underground structures, and more particularly, to facilitate the lifting and lowering of a truss support, to facilitate the separation and placement of formwork and slabs, and to improve the robustness and support of the truss support It relates to an improved down-up device for underground structures that can be greatly improved and can be finely adjusted by hydraulic pressure.

In general, the cut-and-cut earth retaining method has been mainly adopted for various building constructions. In the case of building construction using this cut-and-cut earth retaining method, after installing thumb piles in the ground along the planned excavation planning line of the area, excavation work is performed while By repeating the installation process by inserting the earth plate between the exposed thumb piles, the retaining wall was installed to the foundation floor, and each stratum slab was sequentially poured together with the outer wall from the excavated foundation floor in the retaining wall to construct this structure. .

Building construction using such an open-cut earth retaining method has, first, a vulnerability in constructing a large-scale underground structure in which the excavation scale or excavation depth increases as the earth retaining wall bears the surrounding earth pressure acting during construction, and second In downtown areas where buildings are dense, it is virtually impossible to completely compact the outside of the retaining wall, causing damage to surrounding buildings due to deformation and settlement of the ground floor. There was a problem that the floor area ratio of was reduced, and there was a problem that the construction period was extended as much as the construction of the main structure was carried out only after the fourth retaining wall installation work was completed.

In addition, in order to solve the problems of the conventional open-cut retaining wall construction method, various types of top-down construction methods are actively used at building construction sites.

The top-down construction method is a construction method that forms an underground structure by going down from the ground to the basement in order to minimize the impact on the surroundings in densely populated areas such as downtown construction. After curing after pouring concrete, when the curing of the upper slab beam is finished, the formwork is demolded from the upper slab beam and lowered while maintaining the shape to construct the underground structure.

At this time, the lowered formwork is being reused to form the lower slab beam, and accordingly, the down-up device expands the underground structure while repeatedly lowering the formwork for the slab beam.

Looking at the prior art, a down-up method using a central steel column, registered patent No. 10-2123543, has been devised. A retaining wall construction step of performing a retaining wall construction step, a pillar construction step of vertically driving a steel pillar from the ground into an internal space surrounded by a retaining wall, and excavating the inside of the retaining wall to a predetermined depth to perform excavation work, and perform excavation work. It consists of a wale installation step of installing a wale horizontally on the side of the retaining wall exposed by the wall, and a horizontal beam installation step of installing a horizontal beam connecting the facing wale and the steel pillars between them. Installation steps are repeated, and walls, floors and foundations are constructed according to the design in the interior space.

In addition, a down-up device using a truss-type support has been proposed, and for example, a down-up method of forming an underground structure using a truss-type support, disclosed in Patent Publication No. 10-2020-0032316, has been devised.

In this prior art, in the down-up method of forming an underground structure, installing a column member on the ground, coupling a bracket member to the column member, installing a truss-type support in the transverse direction on top of the bracket member It consists of the steps of:

However, in the case of the prior art, in the process of connecting and constructing a plurality of truss-type supports to bracket members connected to column members, bracket members are connected by welding or bolting, or truss-type supports are connected by welding or bolting. Since the member, the column member and the truss-type support are completely fixed, there is a problem in that the entire column must be reconstructed if the level or distance does not match in the process of connecting and constructing the column member and the column member.

In addition, as the bracket member connected to the column member and the truss-type support connected to the bracket member are connected only by welding or bolts, there is a problem in that it is insufficient to firmly support the load strength of the concrete to be poured.

Patent Document 1: Korean Registered Patent No. 10-2123543 (registered on June 10, 2020) Patent Document 2: Korean Patent Publication No. 10-2020-0032316 (published on March 26, 2020)

The present invention can firmly support the truss support when constructing basement slabs by pouring concrete on the formwork supported by the truss support, and also enables fine adjustment when the truss support is lowered. Its purpose is to provide an improved down-up device for underground structures that can be firmly supported and can greatly improve work convenience according to the lowering operation of the truss support by facilitating separation and separation work between the cast basement slab and formwork there is

As a means for achieving the above object, the improved down-up device for underground structures according to the present invention includes a truss support having an upper chord, a lower chord, and a column upper bracket, a belt ledge connected to the end of the upper chord of the truss support, The column lower bracket installed on the vertical beam to be located at the lower side of the truss support, the column upper bracket of the truss support and the column lower bracket are connected, and the truss support is supported as well as the truss support is perpendicular to the vertical beam. In the down-up device of an underground structure including a hydraulic actuator for moving up and down in a direction, the hydraulic actuator includes a first caster box and a second caster box respectively provided at the lower ends of both sides of the column upper bracket around the vertical beam. a caster box; first hinge connectors and second hinge connectors respectively provided at upper ends of both sides of the lower column bracket around the vertical beam; a first reinforcing hinge connector provided on the left side of the first hinge connector and a second reinforcing hinge connector provided on the right side of the second hinge connector; A first hydraulic jack having a lower end hinged to the first hinge connector and having a first hinge connection piece on one side and being drawn in and out from the first hydraulic jack, located inside the first caster box and sliding along the first caster box a first pull-in/out support rod having a first rolling guide at an upper end; A second hydraulic jack having a lower end hinged to the second hinge connector and having a second hinge connection piece on one side and being drawn in and out from the second hydraulic jack and located inside the second caster box Sliding along the second caster box a second pull-in/out support bar having a second rolling guide at the upper end; a first reinforcing hydraulic jack having a lower end hinged to the first reinforcing hinge connector and a first reinforcing pull-out bar hinged to the first hinge connection piece; It is provided with a second reinforcing hydraulic jack having a lower end hinged to the second reinforcing hinge connector and a second reinforcing pull-out rod hinged to the second hinge connection piece.

Furthermore, a horizontal support is provided at the lower end of the upper chord of the truss support to which the strip ledge is connected to the end, and the horizontal support includes: a horizontal support plate provided on the lower end of the upper chord; A wall stopper fixed to the wall beam to which the strip ledge is connected and having a horizontal hinge connection piece at the top; A horizontal support hydraulic jack whose lower end is hinged to the wall stopper and a horizontal support hinge guide that is drawn in and out from the horizontal support hydraulic jack and accommodated inside the horizontal support plate to slide along the longitudinal direction of the horizontal support plate is provided at the top Equipped with a horizontal support pull-out rod.

In the down-up device for constructing slabs of underground structures, the present invention makes it easy to construct basement slabs for underground structures by step-by-step lowering of the truss support supporting the basement slabs by concrete pouring. It is easy to separate the basement slab from the formwork, and fine adjustment by hydraulic pressure is possible, which greatly improves workability. Since it can be firmly supported on the vertical beam, it can not only firmly support the load intensity due to concrete pouring, but also can firmly support the truss support on the wall beam, and can easily separate the truss support from the wall beam. It can greatly improve work convenience as well as robustness, so it can firmly support the load of concrete being poured, and the truss support can be supported in a double structure by a hydraulic jack and a reinforcing hydraulic jack, so it is possible to lower the truss support as well as pouring concrete. The truss support can be supported more firmly.

1 is a front configuration diagram showing an improved down-up device for an underground structure according to the present invention.
2 is a side configuration diagram showing an improved down-up device for an underground structure according to the present invention.
Figure 3 is a block diagram of a state in which the truss support is lowered by the improved down-up device of the underground structure of the present invention.
Figure 4 is a block diagram of a state in which the truss support is lowered by the improved down-up device of the underground structure of the present invention.
5 is a block diagram showing the horizontal support of the improved down-up device for underground structures according to the present invention.
6 is a partially simplified configuration diagram showing a caster box of an improved down-up device for an underground structure according to the present invention.
7 is a partially simplified configuration diagram showing an upper stopper body of an improved down-up device for an underground structure according to the present invention.
8 is a partially simplified configuration diagram showing the lower stopper body of the improved down-up device for underground structures according to the present invention.
9 is a conceptual diagram showing the construction state of an underground structure by the improved down-up device of an underground structure according to the present invention.

Hereinafter, other objects and features of the present invention in addition to the above objects will be clearly revealed through the description of the embodiments with reference to the accompanying drawings.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in the present application, they should not be interpreted in an ideal or excessively formal meaning. don't

Hereinafter, an improved down-up device for underground structures according to an embodiment of the present invention will be described in more detail with reference to the accompanying drawings.

As shown, the present invention includes a truss support 10 having an upper chord 11, a lower chord 12 and a column top bracket 13, and an end portion of the upper chord 11 of the truss support 10 A belt ledge 20 connected to the truss support 10, a column lower bracket 30 installed on the vertical beam H1 so as to be located on the lower side of the truss support 10, and a column upper bracket 13 of the truss support 10 ) and the pillar lower bracket 30, support the truss support 10, as well as the hydraulic actuator 40 for vertically moving the truss support 10 in the vertical direction with respect to the vertical beam H1 It relates to a down-up device for underground structures including

In the present invention, while lowering the truss support 10 composed of the upper chord 11, the lower chord 12, and the upper column bracket 13 in the vertical direction with respect to the vertical beam H1, the plurality of basement slabs of the underground structure By constructing, the truss support 10 can be firmly supported when constructing the basement slab by pouring concrete into the formwork supported by the truss support 10, as well as the vertical beam H1 ), it is possible to make fine adjustments when descending along the vertical direction of the truss support body (10), it is possible to firmly support the truss support body (10) during the descent, and the separation and separation work between the cast basement slab and formwork is facilitated. The work convenience according to the descending operation can be greatly improved.

To this end, the hydraulic actuator 40 of the present invention includes a first caster box 41 and a second caster box 41a provided at both lower ends of the column upper bracket 13 around the vertical beam H1. ), the first hinge connector 42 and the second hinge connector 42a provided at the upper ends of both sides of the column lower bracket 30 centered on the vertical beam H1, and the first hinge connector 42 The first reinforcing hinge connector 43 provided on the left side of and the second reinforcing hinge connector 43a provided on the right side of the second hinge connector 42a, and the lower end of the first hinge connector 42 is hinged and a first hydraulic jack 44 having a first hinge connection piece 44a on one side and being drawn in and out from the first hydraulic jack 44 and located inside the first caster box 41, the first caster box 41 The first pull-in/out support rod 45 having the first rolling guide 45a sliding along the upper end and the lower end hinged to the second hinge connector 42a, and a second hinge connection piece 46a on one side A second hydraulic jack 46 having a and a second rolling guide drawn in and out from the second hydraulic jack 46 and located inside the second caster box 41a to slide along the second caster box 41a ( 47a) is hinged at the lower end of the second pull-out support bar 47 provided at the upper end and the first reinforcing hinge connector 43, and the first reinforcing piece 44a and the upper end are hinged. The first reinforcement hydraulic jack 48 having an entry rod 48a and the second reinforcement hinge connector 43a having a lower end hinged and a second reinforcement pull-out having an upper end hinged with the second hinge connection piece 46a It is provided with a second reinforcing hydraulic jack 49 having a rod 49a.

The first caster box 41 and the second caster box 41a have an accommodating space 411 in which the first roll guide 45a and the second roll guide 47a are accommodated, respectively, and the accommodating space It is through through the bottom surface 412 of the portion 411 and through through into a long hole along the length direction of the accommodation space portion 411, so that the first withdrawal/exit support rod 45 and the second withdrawal/entry support rod 47 are sliding guides, respectively. A guide hole 413 provided on both sides of the accommodating space 411 and accommodated in the accommodating space 411 are the first and second cloud guides 45a and 47a. ) It is provided with a departure prevention unit 414 that prevents departure from.

The first caster box 41 and the second caster box 41a of the present invention made as described above are provided at both lower ends of the pillar upper bracket 13, respectively, and are provided at the lower ends of both sides of the pillar upper bracket 13. Upper ends of the first caster box 41 and the second caster box 41a are welded or bolted, respectively.

In addition, the first withdrawal/exit support rod 45 is withdrawn from the first hydraulic jack 44 or drawn into the first hydraulic jack 44, and the second withdrawal/entry support rod 47 is pulled out from the second hydraulic jack 46. It is withdrawn or drawn into the second hydraulic jack (46).

At this time, the first hydraulic jack 44 and the second hydraulic jack 46 may each be made of a hydraulic cylinder.

In this way, when the first withdrawal/exit support rod 45 is withdrawn/in/out from the first hydraulic jack 44 and the second withdrawal/exit/output support rod 47 is withdrawn from the second hydraulic jack 46, the first caster box (41) and the second caster box (41a), the first roll guide (45a) and the second roll guide (47a) accommodated in the inner accommodating space (411) are the length of the bottom surface (412) of the accommodating space (411). While being guided along the direction, the rolling movement firmly supports the upper ends of the first withdrawal/exit support rod 45 and the second withdrawal/entry support rod 47 that are drawn in and out, and at the same time lowers and lifts the truss support body 10. Make the movement fine, smooth and easy.

Moreover, the bottom surface 412 of the accommodating space 411 is inclined downward in an arc shape to facilitate the rolling operation of the first and second cloud guides 45a and 47a accommodated in the accommodating space 411. As a result, the first rolling guide 45a when the first pull-out support bar 45 and the second take-out support bar 47 are drawn in and out of the first hydraulic jack 44 and the second hydraulic jack 46, respectively. ) and the rolling sliding operation of the second rolling guide 47a is more easily performed.

In addition, the first roll guide 45a and the second guide 45a along the longitudinal direction of the bottom surface 412 of the accommodation space 411 are provided by separation prevention units 414 provided on both sides of the accommodation space 411 When the rolling guide 47a slides and rolls, it is possible to completely separate from the accommodating space 411 and prevent it from escaping.

In the present invention, the first reinforcement hydraulic jack 48 is hinged at the top of the first hinge connection piece 44a of the first hydraulic jack 44, and the second reinforcement hydraulic jack 49 is the second hydraulic jack 46 Since the upper end of the second hinge connection piece 46a is hingedly connected, the first pull-out support bar 45 and the second pull-out support bar 47 are connected by the first hydraulic jack 44 and the second hydraulic jack 46. When the first rolling guide 45a and the second rolling guide 47a slide in and out, respectively, the tilting motion of the first hydraulic jack 44 and the second hydraulic jack 46 can be supported smoothly and finely. Therefore, the lowering and lowering operations of the truss support 10 can be finely adjusted.

In the present invention made as described above, as shown in FIG. 1, when the first withdrawal/exit support bar 45 and the second withdrawal/exit support bar 47 are retracted with respect to the first hydraulic jack 44 and the second hydraulic jack 46 When the truss support 10 is fixed, and as shown in FIG. 4, the first pull-out support rods ( 45) and the second withdrawal support rod 47 are pulled out, the lower column bracket 30 is vertically lowered with respect to the vertical beam H1, and the lower column bracket 30 is lowered in a state in which the lower column bracket 30 is lowered. ) is fixed to the vertical beam H1, and then the truss support 10 is unfixed, and then the first hydraulic jack 44 withdraws the first withdrawal support rod 45 and the second withdrawal support rod 47, respectively. ) and the second hydraulic jack 46, the truss support 10 is lowered while being pulled toward the column lower bracket 30.

By repeating such an operation, a plurality of basement slabs for the underground structure may be constructed.

A horizontal support 50 is provided at the lower end of the upper chord 11 of the truss support 10 to which the belt ledge 20 of the present invention is connected to the end, and the horizontal support 50, the upper chord 11 ) The horizontal support plate 51 provided on the lower end of the end, the wall stopper 54 having a horizontal hinge connection piece 53 at the top and fixed to the wall beam H2 to which the strip ledger 20 is connected, A horizontal support hydraulic jack 55 whose lower end is hinged to the wall stopper 54 and drawn out from the horizontal support hydraulic jack 55 and accommodated inside the horizontal support plate 51 to be provided in the horizontal support plate 51 It is provided with a horizontal support hinge guide 56 and a horizontal support draw-out rod 57 to which the upper end is hinged.

In the present invention made as described above, as shown in FIG. 5, the phase chord 11 is fixed or separated from the wall beam H2 by the wale ledger 20 connected to the end of the phase chord 11, and accordingly , The truss support 10 having the phase chord 11 is fixed to the wall beam H2 or the fixation is released from the wall beam H2.

Moreover, since the horizontal support 50 can bring the wale ledger 20 into close contact with the wall beam H2 side, the truss support 10 having the upper chord 11 connected to the wale ledge 20 Since it can be closely fixed to the wall beam H2, the truss support 10 can firmly support the concrete load to be poured.

In addition, when the upper chord 11 of the truss support 10 is in close contact with the wall beam H2 by the wale ledge 20 or the wale ledge 20 is separated from the wall beam H2, the horizontal support The entry bar 57 is drawn in and out of the horizontal support hydraulic jack 55 to push or pull the horizontal support hinge guide 56 with the horizontal hinge connection piece 53 as an axis, so that fine adjustment is possible, making it easier The phase chord 11 of the truss support 10 may be brought into close contact with the wall beam H2 by the strip ledge 20 or the strip ledge 20 may be separated from the wall beam H2.

As shown in FIG. 7, the vertical beam H1 of the present invention is located on the lower side of the column top bracket 13 and the truss support 10 is moved by the hydraulic actuator 40 to the vertical beam H1. ), an upper stopper body 60 is provided to prevent the truss support 10 from descending by supporting the lower end of the column top bracket 13 before descending in the vertical direction with respect to ).

The upper stopper body 60 includes an upper stopper contact member 61 that is in close contact with the outer surface of the vertical beam H1 and an upper stopper contact member 61 that is in close contact with each other to correspond to each other. It is provided with an upper stopper long bolt 62 and an upper stopper nut 63 that are tightly fixed to H1).

In this way, as the upper stopper body 60 is provided on the outer surface of the vertical beam H1, the column top bracket 13 can be supported and supported by the upper stopper body 60, so that the truss support body 10 Robustness and supportability are greatly improved.

The reason why the upper stopper fitting 61 of the upper stopper body 60 is bolted together with the upper stopper long bolt 62 and the upper stopper nut 63 is to lower or lift the truss support body 10. When doing so, the upper stopper body 60 is separated from the vertical beam H1, the truss support 10 is lowered, and then the upper stopper body is placed at the lower end of the column upper bracket 13 of the lowered truss support 10. (60) is positioned so as to be supported and reinstalled on the vertical beam (H1).

In addition, as shown in FIG. 8, the vertical beam H1 of the present invention is located on the lower side of the column lower bracket 30, and the truss support 10 is formed by the hydraulic actuator 40. Before descending in the vertical direction with respect to H1), a lower stopper body 70 is provided to prevent the truss support 10 from descending by supporting the lower end of the column lower bracket 30.

The lower stopper body 70 includes a lower stopper contact member 71 that is in close contact with the outer surface of the vertical beam H1 and a lower stopper contact member 71 that is in close contact with each other to correspond to each other. It is provided with a lower stopper long bolt 72 and a lower stopper nut 73 that are tightly fixed to H1).

In this way, as the lower stopper body 70 is provided on the outer surface of the vertical beam H1, the column lower bracket 30 can be supported and supported by the lower stopper body 70, so that the truss support body 10 Robustness and supportability are greatly improved.

The reason why the lower stopper fitting 71 of the lower stopper body 70 is bolted together with the lower stopper long bolt 72 and the lower stopper nut 73 is to lower or lift the truss support body 10. When doing so, the lower stopper body 70 is separated from the vertical beam H1, the truss support 10 is lowered, and then the lower stopper body is placed at the lower end of the column lower bracket 30 of the lowered truss support 10. (70) is positioned so as to be supported and reinstalled on the vertical beam (H1).

As described above, the present invention has been described by specific details such as specific components and limited embodiments and drawings, but these are provided to help a more general understanding of the present invention, and the present invention is not limited to the above embodiments. Those skilled in the art to which the present invention pertains can make various modifications and variations from these descriptions.

Therefore, the spirit of the present invention should not be limited to the described embodiments and should not be determined, and all things equivalent or equivalent to the claims as well as the following claims belong to the scope of the present invention.

10: truss support 11: phase current
12: lower current 13: pillar upper bracket
20: belt tenon 30: column lower bracket
40: hydraulic actuator 41: first caster box
41a: second caster box 42: first hinge connector
42a: second hinge connector 43: first reinforcing hinge connector
43a: second reinforcing hinge connector 44: first hydraulic jack
44a: first hinge connection piece 45: first withdrawal support bar
45a: first rolling guide 46: second hydraulic jack
46a: second hinge connection piece 47: second withdrawal support bar
47a: second rolling guide 48: first reinforced hydraulic jack
48a: first reinforcement bar 49: second reinforcement hydraulic jack
49a: second reinforcing bar 50: horizontal support
51: horizontal support plate 53: horizontal hinge connection piece
54: wall stopper 55: horizontal support hydraulic jack
56: horizontal support hinge guide 57: horizontal support draw-out bar
60: upper stopper body 61: upper stopper close fitting
62: upper stopper long bolt 63: upper stopper nut
70: lower stopper body 71: lower stopper close fitting
72: lower stopper long bolt 73: lower stopper nut
411: accommodation space 412: accommodation space bottom surface
413: guide hole 414: separation prevention unit

Claims (5)

A truss support (10) having an upper chord (11), a lower chord (12), and a column top bracket (13), and a belt tenon (20) connected to the end of the upper chord (11) of the truss support (10) And, the column lower bracket 30 installed on the vertical beam H1 to be located on the lower side of the truss support 10, the column upper bracket 13 of the truss support 10 and the column lower bracket 30 ) and supporting the truss support 10 as well as a hydraulic actuator 40 for vertically moving the truss support 10 in the vertical direction with respect to the vertical beam H1. in
The hydraulic actuator 40,
a first caster box 41 and a second caster box 41a provided at both lower ends of the columnar upper bracket 13 centered on the vertical beam H1;
a first hinge connector 42 and a second hinge connector 42a respectively provided at upper ends of both sides of the lower pillar bracket 30 around the vertical beam H1;
a first reinforcing hinge connector 43 provided on the left side of the first hinge connector 42 and a second reinforcing hinge connector 43a provided on the right side of the second hinge connector 42a;
The first hydraulic jack 44 having a lower end hinged to the first hinge connector 42 and having a first hinge connection piece 44a on one side, and the first hydraulic jack 44 is drawn in and out of the first caster box 41 ) and a first pull-in/out support rod 45 provided at the top of a first rolling guide 45a located inside the first caster box 41 and sliding along the first caster box 41;
The second hydraulic jack 46 having a lower end hinged to the second hinge connector 42a and having a second hinge connection piece 46a on one side and the second hydraulic jack 46 are drawn in and out of the second caster box 41a ) and a second pull-in/out support rod 47 having a second rolling guide 47a located on the inside and sliding along the second caster box 41a at the upper end;
A first reinforcing hydraulic jack 48 having a first reinforcing pull-out bar 48a having a lower end hinged to the first reinforcing hinge connector 43 and an upper end hingedly connected to the first hinge connection piece 44a;
The second reinforcing hydraulic jack 49 having a second reinforcing pull-out rod 49a having a lower end hinged to the second reinforcing hinge connector 43a and a second reinforcing pull-out rod 49a hingedly connected to the upper end of the second hinge connection piece 46a. Improved down-up device for underground structures, characterized in that.
According to claim 1,
A horizontal support 50 is provided at the lower end of the upper chord 11 of the truss support 10 to which the strip ledge 20 is connected to the end,
The horizontal support 50,
a horizontal support plate 51 provided on the lower end of the upper chord 11;
A wall stopper (54) fixed to the wall beam (H2) to which the strip ledger (20) is connected and having a horizontal hinge connecting piece (53) at the top;
A horizontal support hydraulic jack 55 whose lower end is hinged to the wall stopper 54 and drawn out from the horizontal support hydraulic jack 55 and accommodated inside the horizontal support plate 51 to be provided in the horizontal support plate 51 An improved down-up device for underground structures, characterized in that it is provided with a horizontal support hinge guide 56 and a horizontal support pull-out rod 57 to which the upper end is hinged.
According to claim 1,
The vertical beam H1 is located on the lower side of the column top bracket 13, and before the truss support 10 is lowered in the vertical direction with respect to the vertical beam H1 by the hydraulic actuator 40, the An upper stopper body 60 is provided to prevent the truss support 10 from descending by supporting the lower end of the column upper bracket 13,
The upper stopper body 60,
Upper stopper close fittings 61 that are in close contact with each other on the outer surface of the vertical beam H1;
An improved down of an underground structure characterized in that it is provided with an upper stopper long bolt 62 and an upper stopper nut 63 for closely fixing the upper stopper close fitting 61 that is in close contact with each other to the vertical beam H1 up device.
According to claim 1,
The vertical beam H1 is located on the lower side of the column lower bracket 30, and before the truss support 10 is lowered in the vertical direction with respect to the vertical beam H1 by the hydraulic actuator 40, the A lower stopper body 70 is provided to prevent the truss support 10 from descending by supporting the lower end of the column lower bracket 30,
The lower stopper body 70,
lower stopper close fittings 71 that are in close contact with each other on the outer surface of the vertical beam H1;
An improved down of an underground structure characterized in that it is provided with a lower stopper long bolt 72 and a lower stopper nut 73 for closely fixing the lower stopper close fitting 71 that is in close contact with each other to the vertical beam H1 up device.
According to claim 1,
The first caster box 41 and the second caster box 41a of the hydraulic actuator 40 are respectively,
an accommodating space 411 in which the first and second cloud guides 45a and 47a are respectively accommodated;
The bottom surface 412 of the accommodating space 411 is through, but through is a long hole along the longitudinal direction of the accommodating space 411, so that the first withdrawal/exit support rod 45 and the second withdrawal/entry support rod 47 are formed. guide holes 413 each sliding and guiding;
Departure prevention that is provided on both sides of the accommodating space 411 and prevents the first and second cloud guides 45a and 47a accommodated in the accommodating space 411 from escaping from the accommodating space 411 Improved down-up device for underground structures, characterized in that provided as part 414.

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