JP3806098B2 - Blade structure of underground structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a blade structure of a large-scale underground structure that is constructed to be propelled in a transverse direction in a lower ground such as a railway or a road.
[0002]
[Prior art]
In order to promote and construct a large number of underground structures in the crossing direction in the lower ground such as railways and roads, conventionally, for example, as shown in FIG. 2 is built, the start pit 3 and the arrival pit 4 are constructed, and the start pit 3 is directed to the arrival pit 4 as a protective work for supporting the upper traffic 1 so as to cross the lower part of the upper traffic 1. A pipe roof 5 in which steel pipes are horizontally aligned is constructed.
[0003]
In order to bury the concrete box as the underground structure 6, the reaction force wall 7 and the underground structure 6 are set in the start pit 3, and the reaction force wall 7 and the underground structure 6 are pressed between the reaction force wall 7 and the underground structure 6. A propulsion jack 8 is provided, and a cutting edge 9 is provided at the tip of the underground structure 6. Then, the propulsion jack 8 is extended to dig the underground structure 6 inside the pipe roof 5. In the figure, reference numeral 10 denotes a strut interposed between the propulsion jack 8 and the underground structure 6.
[0004]
The prior art has been generally performed by those skilled in the art and is not related to a known invention.
[0005]
[Problems to be solved by the invention]
When propelling a concrete box, which is an underground structure, the box is inserted into the frame formed by the pipe roof with a gap of several tens of centimeters. Between this box and the pipe roof is usually an unexcavated ground, and as the box advances, the ground may collapse, making it difficult to stabilize the ground. It is.
[0006]
An object of the present invention, the eliminating the disadvantages of the prior art, when propelling the underground construction in which a cutting edge at the tip, of course be able to stabilize the tunnel face to prevent collapse of natural ground An object of the present invention is to provide an edge structure of an underground structure that can smoothly advance the edge.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides the upper edge structure of an underground structure that is embedded in the ground by propulsion and has an upper edge and a blade edge on both sides, and has a front end of the box. The cylinder of the slide jack is fixed to the part, the rod of the slide jack is attached to the receiving cylinder fixed to the lower part of the upper blade edge, and the upper blade edge is provided so that it can advance forward independently of the box. , attachment to receiving cylinder of the rod penetrates the rod so that the pin round steel fixed to receiving cylinder is perpendicular to the rod, the upper portion of the cutting edge is underground construction that combines freely undulating to the rod In the blade edge structure, the upper blade edge is arranged so as to straddle the opening between the upper floor plates fixed at a distance to the box prior to the forward movement of the box, and both left and right sides with respect to the traveling direction. Installed so that the upper surface of the upper floorboard slides in the direction of digging. It is an essence that was.
[0008]
According to the first aspect of the present invention, since the upper blade edge is advanced prior to the advancement of the concrete box which is an underground structure, unexcavated between the pipe roof and the box when the box is advanced. The fall of the natural ground can be prevented, and the face can be stabilized. In this case, the upper blade edge can be advanced by simply extending the rod of the slide jack, the operation is easy, and the blade edge is pin-connected to the pin round steel, so it is independent from the forward direction of the box. Can be undulated up and down, and can flexibly cope with the situation in the field.
[0009]
Furthermore, since the upper blade edge slides on the upper surface of the upper floor board, it is smoothly pushed out in the direction of excavation.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a side view of a portion of an upper blade edge which is an essential part showing an embodiment of the blade structure of an underground structure of the present invention, FIG. 2 is a front view thereof, FIG. 3 is a plan view thereof, and FIG. The same components as those in the conventional example shown in FIG.
[0011]
The underground structure 6 that is a concrete box according to the present invention is provided with blade edges 9 on the top and left and right sides of the tip as in the prior art. This was slidably provided in the underground structure 6 so as to be able to advance forward independently of the underground structure 6.
[0012]
If it demonstrates from the attachment structure to the underground structure 6 of the upper blade edge 9a, as shown in FIGS. 2-4, the upper floor board 11 of the underground structure 6 will be arrange | positioned at intervals, and between adjacent upper floor boards 11 will be shown. An opening 12 was formed on the upper surface of the upper floor plate 11 so as to straddle the opening 12, and the blade 9a was slidable forward independently of the upper floor plate 11 independently.
[0013]
As shown in FIG. 5, the slide structure of the blade 9a is fixed by fixing the base of the cylinder 13a of the slide jack 13 in the opening 12 at the front end portion of the underground structure 6 box as shown in FIG. The receiving tube 14 is fixed to the lower portion of the upper blade 9a, and a pin round steel 15 is provided in the receiving tube 14 in a direction perpendicular to the receiving tube 14, and the pin round steel 15 is attached to the slide jack 13. The tip of the rod 13b was penetrated. Thereby, the front-end | tip of the blade mouth 9a rotates to the up-down direction by the pin round steel 15, and is supported so that raising / lowering is possible.
[0014]
Next, a method for propelling the underground structure 6 will be described. Since the outline of the propulsion method is the same as that of the conventional example described with reference to FIG. 6, a detailed description thereof is omitted here. In the present invention, the underground structure 6 is installed in the start pit 3 as shown in FIG. The propulsion jack 8 is pushed out from behind, or although not shown in the figure, the propulsion jack is pulled from the front by the towing jack installed on the arrival pit 4 side and propelled.
[0015]
In this case, only the upper blade edge 9a is advanced prior to the advancement of the underground structure 6, but in order to advance the upper blade edge 9a, the rod 13b of the slide jack 13 can be extended by extending the rod 13b. The receiving cylinder 14 advances following the extension of the rod 13b via the pin round steel 15 to which the tip of 13b is pin-coupled, and thereby the upper blade 9a to which the receiving cylinder 14 is fixed advances. .
[0016]
At this time, since the upper blade edge 9a is coupled to the rod 13b via the pin round steel 15 as described above, it can be raised and lowered in the vertical direction with respect to the rod 13b, and the slide jack 13, that is, the underground structure 6 It is possible to move forward in a different direction independently of the direction of travel, and flexibly deal with the situation in the field.
[0017]
Further, the upper blade edge 9a advances smoothly so that both the left and right sides of the blade edge 9a slide on the upper surface of the upper floor plate 11, and thus the upper blade edge 9a advances the underground structure 6. By sliding forward in advance, it is possible to prevent collapse of a natural ground between a pipe roof and the like as a protective work.
[0018]
【The invention's effect】
As described above, the blade structure of the underground structure of the present invention is such that when the underground structure such as a concrete box having a blade edge at the tip is propelled, only the upper edge of the tip is propelled by the underground structure. Therefore, it is possible to prevent the ground from collapsing from above and to stabilize the face. And when moving the upper blade edge in this way, the blade edge can be raised and lowered independently from the forward direction of the box, flexibly responding to the situation at the site, and can be advanced smoothly it can.
[0019]
Furthermore, since the blade edge is smoothly moved so that the left and right sides of the blade edge slide on the upper surface of the upper floor plate, the blade edge slides forward prior to the advancement of the underground structure, so It is possible to reliably prevent the collapse of the natural ground between the pipe roof and the like.
[Brief description of the drawings]
FIG. 1 is a side view of an upper blade edge portion that is a main part of an embodiment of a blade structure for an underground structure according to the present invention.
FIG. 2 is a front view of an upper blade edge portion that is an essential part showing an embodiment of the blade structure of an underground structure according to the present invention.
FIG. 3 is a plan view of an upper blade portion which is a main part showing an embodiment of the blade structure of an underground structure according to the present invention.
FIG. 4 is a plan view of an upper floor board which is a main part showing an embodiment of the edge structure of an underground structure according to the present invention.
FIG. 5 is a plan view of a slide jack portion that is a main part showing an embodiment of a blade structure of an underground structure according to the present invention.
FIG. 6 is an explanatory diagram showing a method for propelling an underground structure.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Upper traffic 2 ... Earth retaining steel sheet pile 3 ... Starting pit 4 ... Arrival pit 5 ... Pipe roof 6 ... Underground structure 7 ... Reaction force wall 8 ... Propulsion jack 9 ... Blade 9a ... Upper blade 10 10 ... Strut 11 ... Upper floor board 12 ... Opening 13 ... Slide jack 13a ... Cylinder 13b ... Rod 14 ... Receiving cylinder 15 ... Pin round steel

Claims (1)

Is buried in the ground by the propulsion, a cutting edge structure of the upper part of the underground construction is a box body having a cutting edge on the top and sides, the cylinder of the slide jack is fixed to the front end of the box making body, The rod of the slide jack is attached to a receiving cylinder fixed to the lower part of the upper blade, and the upper blade is provided so as to be able to advance forward independently of the box, and the mounting portion of the rod to the receiving tube penetrates the rod so that the pin round steel fixed to receiving cylinder is perpendicular to the rod, the upper portion of the cutting edge in the cutting edge structure of undulating freely combined underground construction was to the rod, the blade of the upper The mouth is arranged so as to straddle the opening between the upper floor boards fixed at a distance to the box prior to the forward movement of the box, and the left and right sides slide in the direction of excavation on the upper surface of the upper floor board with respect to the traveling direction. Of underground structures characterized by Mouth structure.

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