JP3677704B2 - Steel erection equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a steel erection device for accurately erection of a steel frame in an excavation mine such as an underground continuous wall.
[0002]
[Prior art]
When constructing an underground continuous wall with an SRC structure, a technique is adopted in which an excavation pit is formed in the ground, and a concrete stake is placed after a reinforcing bar or steel frame is built in the excavation pit. Conventionally, a crane has been used to build a steel frame in such an excavation mine.
[0003]
[Problems to be solved by the invention]
However, if only a crane is used as described above, it is difficult to build a steel frame with high accuracy in a predetermined position and direction because a position shift or the like is caused by lifting the steel frame.
[0004]
Therefore, an object of the present invention is to provide a steel erection device that can erode a steel frame accurately at an appropriate position in an excavation mine.
[0005]
[Means for Solving the Problems]
In the present invention, the following means are adopted in order to solve the above problems.
The steel erection device according to claim 1 is a steel erection device for erection of a steel frame inside an excavation pit formed in the ground,
An upper frame fixed to the surface of the ground, a lower frame inserted into the excavation pit , two guide members connecting the upper frame and the lower frame, and connecting the two guide members With a binder ,
Guide rails for restricting displacement of the steel frame in a direction intersecting the inner wall of the excavation mine when the steel frame is installed in the excavation mine are respectively provided on side surfaces facing each other of the guide materials. It is characterized by.
[0006]
In this steel erection device, when the steel frame is erected, the guide rail prevents the steel frame from being displaced in the direction intersecting the inner wall of the excavation mine, and the steel frame is arranged vertically in the excavation mine with high accuracy. Is done.
[0007]
The steel erection device according to claim 2 is the steel erection device according to claim 1,
The lower frame is provided with a jack for taking a reaction force from the inner wall of the excavation mine and adjusting a relative displacement between the lower frame and the inner wall.
[0008]
In this steel erection device, the accuracy of erection of the steel frame in the vertical direction can be increased by adjusting the relative displacement between the lower frame and the inner wall of the excavation hole by the jack.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In addition, embodiment described here uses this invention with respect to the erection of the steel frame at the time of constructing the underground continuous wall which has SRC structure.
[0010]
FIG. 1 is a diagram showing an embodiment of the present invention. Reference numeral 1 represents a steel erection device. The steel erection apparatus 1 is disposed inside an excavation pit 3 formed with respect to the ground 2 that constructs an underground continuous wall, and includes an upper frame 5, a lower frame 6, and the upper frame 5 and the lower frame. 6 are provided with guide members 7 and 7 for connecting the two.
The lower frame 6 is provided with a plurality of reaction force plates 9. These reaction force plates 9, 9,... Are provided at the tip of a hydraulic jack (not shown). Further, by operating these hydraulic jacks, the lower frame 6 is configured to be able to take a reaction force from the excavation pit inner wall 3a.
[0011]
The guide members 7 and 7 are both made of H-shaped steel and are connected to each other by a plurality of connecting members 10, 10,... And guide rails formed by flat bars along the opposing side surfaces 7 a and 7 a. 12 and 12 are arranged. The guide rails 12, 12 are configured to restrict the horizontal displacement of the steel frame 13 when the steel frame 13 is vertically built into the excavation pit 3 as indicated by a two-dot chain line in the figure.
Further, on both sides of the guide members 7 and 7, tremy tube guides 14 and 14 configured in a tubular shape are provided so that treme tubes for placing concrete can be inserted when the underground continuous wall is constructed. ing.
[0012]
FIG. 2 is a diagram showing the steel erection device 1 from above. As described above, the excavation pit 3 is excavated in order to construct an element of the underground continuous wall and, as shown in the figure, is long in the extending direction (direction A) of the underground continuous wall. It is formed in a scale, and in the wall thickness direction (B direction) of the underground continuous wall, it is formed in a dimension shorter than the A direction.
[0013]
The upper frame 5 includes a pair of lower members 16 that are fixed to the surface 2a of the ground 2 via an upper jack 15 and a pair of upper members 17 that connect the lower members 16 to each other. The upper members 17 and 17 and the lower members 16 and 16 are assembled so as to have a square shape when viewed from above, and to form a space 18 for arranging the steel frame 13 on the inside thereof. .
[0014]
FIG. 3 is a diagram showing a cross section taken along line II in FIG. As shown in the figure, the guide members 7 and 7 are both made of H-shaped steel. The connecting member 10 includes fixing members 10a, 10a,... Disposed on both sides of the guide members 7, 7, and plate-like connecting members 10b, 10b that connect the fixing members 10a, 10a,. ing.
[0015]
Further, an inclinometer 20 is provided along one of the guide rails 12 and 12 for confirming whether or not the guide rail 12 is arranged vertically. Here, the inclinometer 20 is composed of a tubular container into which water is injected, and a float is floated on the surface of the water injected into the inside. By restricting the movement of the position of the float with respect to the axial direction of the container and allowing the movement with respect to a direction perpendicular to the axial direction, the guide rails 12 and 12 are arranged vertically from the position of the float in the container. You can check whether or not.
Further, the lower frame 6 is provided with hydraulic jacks 21, 21... That can be operated from the ground via a pipe (not shown). The hydraulic jacks 21, 21. The reaction force can be taken from the inner wall 3a of the excavation mine via. Further, by operating the hydraulic jacks 21, 21,... From the ground, the position of the lower frame 6 inside the excavation pit 3 can be adjusted.
In addition, to the steel frame 13, guide fittings 22, 22 that can be fitted to the guide rail 12 are attached. With this, when the steel frame 13 is installed, the steel frame 13 is smoothly moved by the guide rail 12. You will be guided.
Details of the guide rail 12 and the guide fitting 22 are shown in FIG.
[0016]
FIG. 5 is a view showing a II-II cross section in FIG. 2. As shown in the drawing, among the connecting members 10, the fixing members 10a and 10a joined to the guide member 7 are made of H-shaped steel, and the connecting members 10b and 10b are made of flat steel.
[0017]
The above is the main configuration of the steel erection device 1 in the present embodiment. Next, a method for erection of the steel frame 13 in the excavation mine 3 using the steel erection device 1 will be described.
[0018]
First, with the hydraulic jacks 21, 21,. Next, the upper frame 5 is disposed on the surface 2 a of the ground 2. At this time, the upper frame 5 is arranged at an appropriate position while performing the survey by the transit so that the guide members 7 are arranged at the same position as the core of the underground continuous wall to be constructed. Further, by operating the upper jacks 15, 15,..., The level of the upper frame 5 is maintained.
[0019]
Next, the guide members 7, 7 are brought into a vertical state by operating the hydraulic jacks 21, 21,. At this time, it is confirmed by the inclinometer 20 whether the guide members 7 and 7 are vertical.
[0020]
When the guide members 7 and 7 are in a vertical state, the steel frame 13 is lifted by a crane and is built along the guide rail 12 inside the excavation pit 3. At this time, as shown in FIGS. 1 and 3, a guide fitting 22 is attached to the steel frame 13 in advance so that the steel frame 13 is smoothly guided by the guide rail 12. Furthermore, a support metal fitting (not shown) is attached to the steel frame 13 in the vicinity of the upper end position.
[0021]
When the steel frame 13 is installed as shown in FIG. 1, a support fitting (not shown) attached to the steel frame 13 is supported by a journal jack (not shown), and the vertical position of the steel frame 13 is adjusted. . Thereby, the erection of the steel frame 13 is completed.
Thereafter, in order to further construct the underground continuous wall inside the excavation pit 3, the tremy pipe is inserted into the tremy pipe guide 14 and the concrete is placed in the excavation pit 3.
[0022]
In the steel erection apparatus 1 described above, the vertical erection of the steel frame to the excavation mine, which is necessary when constructing the underground continuous wall or the like of the SRC structure, can be performed with high accuracy and a simple configuration. it can. In particular, since the steel frame 13 is built along the guide rail 12 after the lower frame 6 is inserted into the excavation pit 3, the guide rail 12 prevents the horizontal displacement of the steel frame 13. In addition to ensuring the accuracy, after positioning the steel frame 13, it is possible to perform operations such as placing concrete, and it is possible to reliably and easily construct the underground continuous wall and the like.
[0023]
Further, in the steel erection apparatus 1, hydraulic jacks 21, 21,... To which a reaction force plate 9 is attached are provided to the lower frame 6, and the inner wall of the excavation pit 3 is provided by these hydraulic jacks 21, 21,. By taking a reaction force from 3a, the position of the lower frame 6 inside the excavation pit 3 can be adjusted. Therefore, it is possible to reliably perform an operation for arranging the guide rail 12 vertically.
[0024]
In addition, in the said embodiment, if it is a range which does not deviate from the main point of this invention, the structure of each part of the steel erection apparatus 1, the erection method of the steel frame 13, the structure of the inclinometer 20, and also the erection of the steel frame Any other configuration such as the shape of the excavation pit 3 to which the insertion device 1 is applied may be adopted.
For example, when the upper frame 5 is installed on the surface 2a of the ground 2, surveying may be performed in advance to mark the installation target position of the upper frame 5 on the surface 2a.
[0025]
【The invention's effect】
As described above, the steel frame erection device according to claim 1 connects the upper frame fixed to the surface of the ground, the lower frame inserted into the excavation shaft, and the upper frame and the lower frame. drilling and two guide members, two connecting guide member to each other are configured to include a tether, a steel with one another along a facing respectively provided with guide rails on the side surface of each guide member It can be built in the mine. Therefore, the guide rail prevents the displacement of the steel frame in the direction intersecting the inner wall of the excavation mine, and not only can ensure accuracy, but also can perform operations such as placing concrete after positioning the steel frame, Construction work such as underground continuous walls can be performed reliably and easily. Moreover, it is possible to perform such a steel frame erection operation with a simple configuration without using a crane.
[0026]
In the steel frame erection device according to the second aspect, the lower frame is provided with a jack for taking a reaction force from the inner wall of the excavation mine and adjusting the relative displacement between the lower frame and the inner wall. Therefore, by operating these jacks, it is possible to reliably perform an operation for arranging the guide rails in an appropriate direction, thereby enabling the steel frame to be built in the excavation mine with high accuracy.
[Brief description of the drawings]
FIG. 1 is an elevational side view of a steel erection apparatus schematically showing an embodiment of the present invention.
FIG. 2 is a plan view of the steel erection apparatus shown in FIG.
FIG. 3 is a plan sectional view of the same.
4 is an enlarged plan sectional view showing the vicinity of a guide hardware attached to the steel frame in the steel erection device and the steel frame shown in FIG. 3;
FIG. 5 is an elevational side view of the steel frame erection device shown in FIGS. 1 to 3;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Steel frame installation equipment 2 Ground 3 Excavation pit 3a Inner wall 5 Upper frame 6 Lower frame 7 Guide material 12 Guide rail 21 Hydraulic jack (jack)

Claims (2)

A steel erection device for erection of a steel frame inside an excavation pit formed in the ground,
An upper frame fixed to the surface of the ground, a lower frame inserted into the excavation pit , two guide members that connect the upper frame and the lower frame, and a link that connects the two guide members together With materials ,
Guide rails for restricting displacement of the steel frame in a direction intersecting the inner wall of the excavation mine when the steel frame is installed in the excavation mine are respectively provided on side surfaces facing each other of the guide materials. A steel frame erection device characterized by A steel frame erection device according to claim 1,
A steel frame erection device, wherein the lower frame is provided with a jack for taking a reaction force from the inner wall and adjusting a relative displacement between the lower frame and the inner wall.

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