JP2010112037A - Method for removing and restoring underground installation - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve constructibility by preventing a traffic hindrance from being caused by the interruption of an upper road and by dispensing with carrying-in/carrying-out and temporary placement of a large amount of sediment in removing an underground installation while a construction range is reduced without requiring construction of large-scale cofferdam revetment in embankment work. <P>SOLUTION: The underground installation 2 is enclosed with a cylindrical body 8 having a cross section including the underground installation 2. The demolition of the underground installation 2 and the excavation and removal of the sediment are performed in the cylindrical body 8, while the cylindrical body 8 is advanced underground from a starting shaft 9. After the cylindrical body 8 reaches an arrival shaft 10, a void after the movement of the cylindrical body 8 is backfilled while the cylindrical body 8 is returned to the side of the starting shaft 9. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a method for removing and recovering underground buried objects such as dredgers that cross river embankments.

  As a method for removing buried pipes that cross the river embankment and restoring the buried part, for example, the open cut method shown in FIGS. 12 to 14 or the mountain retaining method shown in FIGS. There is.

  The open cut method leaves the slope around the river embankment 1 that is the excavation part, and the ground excavation part is exposed to root the ground from the ground surface to expose the underground buried object 2 and remove it. In the mountain retaining method, a cut beam 3 is provided at the excavation part as a mountain retaining support, and the underground buried object 2 is exposed in a state where the retaining wall 4 is constructed in the surrounding natural ground, and this is removed.

  Then, after removing the underground buried object 2, the earth and sand are refilled again to restore the site.

  The prior art is generally performed by those skilled in the art, and does not relate to a known literature.

  Since the construction method is an open-cut method, the excavation width is large. In particular, in the case of the open cut method, the excavation width is much larger than the width of the underground buried object 2 as shown in FIGS. Will be blocked and traffic will be hindered. In addition, as shown in FIGS. 12 and 15, when the earth covering is large, the influence range of the construction may be increased.

  Furthermore, all the earth and sand above the underground buried object is removed, and after removing the buried object, the earth and sand will be backfilled in the excavated space and the void created by the removal. Again, it is necessary to carry in and carry the earth and sand, and it takes a lot of time to carry in and out the earth and sand, and it is also necessary to secure a temporary storage space for a large amount of earth and sand.

  When the construction site is river embankment 1 or the like, as shown in FIGS. 13 and 14, the open cut method is to surround the river 5 side of the underground buried object 2 on the river 5 side in order to break the bank. It is necessary to construct a large temporary deadline revetment 6 separately.

  And the earth and sand backfilling work after removing the underground buried object 2 becomes a limited space, and it is difficult to perform sufficient compaction.

  The present invention eliminates the inconvenience of the conventional example, and when removing underground buried objects, there is no traffic obstacle caused by blocking the upper road, and a large amount of earth and sand can be carried in and out. It is possible to improve the workability without the necessity of construction, and to provide a method for removing and recovering underground buried objects that can reduce the construction scope without the need to build a large temporary cutoff revetment in the case of dike construction It is in.

  In order to eliminate the inconvenience of the conventional example, the present invention surrounds the underground buried object with a cylinder having a cross section encompassing the underground buried object, and advances the cylinder from the start shaft into the ground. The gist is to dismantle underground structures and excavate and remove earth and sand in the cylinder, and after filling the underground structure, return the cylinder to the start shaft while filling the gap after moving the cylinder. It is.

  According to the first aspect of the present invention, since the construction is performed by the non-open cutting method, there are few traffic obstacles without blocking the road. Moreover, it is only necessary to take an underground buried object into the cylinder body, to remove and remove the buried object in the cylinder body, and to excavate and remove the earth and sand only in the cylinder body. Therefore, even if the earth covering is large, the influence range of the construction does not increase. Furthermore, in the case of embankment construction, a small temporary deadline is sufficient, so the workability can be improved and the construction can be completed within the dry season.

  And also in the backfilling, it is only necessary to fill the gap with a backfilling material while pulling back the cylinder, so that compaction compaction is unnecessary and the workability can be improved.

  The invention described in claim 2 surrounds the underground buried object with a cylindrical body having a cross section encompassing the underground buried object, and moves the cylinder while pulling the underground body from the starting vertical shaft and moving forward with the traction equipment installed in the reaching vertical shaft. After demolition of underground underground and excavation and removal of earth and sand in the body, after the demolition of the underground structure is completed and the cylinder reaches the arrival shaft, the cylinder is moved to A method for removing and recovering underground structures, characterized by refilling the voids.

  According to the second aspect of the present invention, in addition to the above-described function, a reaching shaft is constructed, and the tubular body is pulled forward by the traction equipment installed here, so that the tubular body is reliably advanced to the reaching shaft and buried underground. The removal of objects can be ensured, and even if the length of underground objects is large, it can be reliably removed.

  The invention described in claim 3 surrounds the underground buried object with a cylinder having a cross-section encompassing the underground buried object, and pushes the cylinder with a propulsion equipment installed in the start shaft, and advances the underground to the underground buried object. And the excavation and removal of earth and sand, and after the demolition of the underground structure is completed and the cylinder reaches the reaching shaft, the gap after moving the cylinder is backfilled while returning the cylinder to the starting shaft. To do.

  According to the third aspect of the present invention, the underground shaft can be reliably removed by confirming that the cylindrical body has reached here by constructing the reaching shaft.

  The invention described in claim 4 surrounds the underground buried object with a cylinder having a cross-section encompassing the underground buried object, and pulls the cylinder from the start shaft with a towing facility and advances the underground to the underground buried object. The gist is to refill the void after moving the cylinder while returning the cylinder to the start shaft side after completion of the demolition of the underground structure and excavation and removal of earth and sand.

  According to the fourth aspect of the present invention, when the underground buried object in the buried state is completely demolished, the traction facility is moved to the start shaft side and deployed so that the cylinder penetrates to the shaft on the arrival side. Since the cylinder can be pulled back without moving forward, it is not necessary to close the opening of the shaft on the reaching side, and the workability can be improved. In addition, the cylindrical body is not advanced more than necessary.

  In the invention according to claim 5, the underground buried object is surrounded by a cylinder having a cross section encompassing the underground buried object, and the cylinder is pushed by the propulsion equipment installed in the start shaft and is advanced in the ground while being underground. The gist is to refill the void after moving the cylinder while returning the cylinder to the start shaft side after completion of the demolition of the underground structure and excavation and removal of earth and sand.

  According to the fifth aspect of the present invention, the cylinder is propelled by the propulsion equipment installed in the start shaft, and the cylinder is pulled back to the start shaft when the underground buried object in the embedded state is completed. Therefore, it is not necessary to build a reaching shaft, and workability can be improved.

  The gist of the invention described in claim 6 is that the cylindrical body has a cutting edge at the tip, and the cross section of the cutting edge is closed when the cylindrical body is pulled back.

  According to the sixth aspect of the present invention, since the cross section of the blade edge is closed when the cylinder is pulled back, the backfill material can be easily and surely filled into the space after the buried object is removed.

  As described above, in the method for removing and recovering an underground object according to the present invention, when the underground object is removed, the cylinder is advanced in the ground so as to surround the underground object, and the underground object is Because it is based on a non-open-cutting method that is torn down, there is no traffic obstruction caused by blocking the upper road by cutting, and only a limited area of sediment in the cylinder is carried out even if the cover is large. Therefore, there is no need to carry in and carry out a large amount of earth and sand generated during removal of buried objects, and temporary filling of voids after removal of buried objects can be facilitated, and workability can be improved. In addition, there is no need to build a large temporary cutoff revetment in the case of dike construction, so the construction area can be reduced and the work can be completed within the drought period.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a longitudinal side view showing a first embodiment of a method for removing and recovering underground buried objects according to the present invention. The method according to the present invention removes underground buried objects 2 such as dredging pipes buried in river embankments 1 and the like. Then, the gap after removal is restored, and in the figure, the same components as those in the conventional example shown in FIGS. 12 to 17 are denoted by the same reference numerals.

  For example, in order to remove the underground pipe 2 that is buried in the river embankment 1, as shown in FIG. 1, as shown in FIG. Each of the reaching shafts 10 is constructed.

  Next, a cylinder 8 having a blade edge 12 at the tip is installed in the start shaft 9. As shown in FIG. 4, the cylindrical body 8 has a cross section that can enclose the underground buried object 2, and is cylindrical in this embodiment.

  A supporting wall 13 is constructed as a traction facility in the reach shaft 10, a traction jack 14 is disposed, and the other end of the traction member such as a PC steel wire 15 having one end fixed to the traction jack 14 via a fixing tool. Connect to the cylinder 8. The pulling member made of the PC steel wire 15 or the like is arranged in the inner space of the underground buried object 2 or the earth and sand outside the underground buried object 2 is horizontally drilled and arranged.

  Next, as a work for removing the underground buried object 2, the tubular body 8 is pulled by the tow jack 14, and the tubular body 8 is advanced from the start shaft 9 side to the arrival shaft 10 side. As shown in FIG. The underground buried object 2 is taken in, and the cylinder 8 surrounds the underground buried object 2, and the edge of the underground buried object 2 is demolished and removed within the blade edge 12, and the blade edge 12 and the cylinder 8 Excavation and removal of earth and sand.

  In this case, as shown in FIG. 18 and FIG. 19, the earth and sand excavation is limited to those within the blade edge 12 and the cylindrical body 8, so it is not necessary to excavate and discharge a large amount of earth and sand even if the head covering is large. Further, since it is possible to perform non-cutting, there is no need to block the upper road, and the cut-off portion is only the start shaft 9 and the reaching shaft 10 as shown in FIG. Furthermore, there is no need to build a temporary deadline revetment.

  When the underground buried object 2 in the cylindrical body 8 is demolished and removed, and the excavation and discharge of earth and sand is completed, the blade 12 and the cylindrical body 8 are further pulled to the arrival shaft 10 side by the towing jack 14, and the cylindrical body 8 is added. While moving forward, the end of the underground buried object 2 is drawn into the blade 12 and the cylindrical body 8. Then, in the same manner as the previous time, the underground buried object 2 is demolished in the cylinder 8, and the earth and sand in the cylinder 8 is excavated and discharged. By repeating this, the underground buried object 2 is demolished while the blade edge 12 and the cylindrical body 8 are advanced toward the reaching shaft 10 side.

  When the demolition of the underground buried object 2 is completed as described above and the blade edge 12 reaches the reaching vertical shaft 10, the towing jack 14 is moved to the start vertical shaft 9 side as shown in FIG. The opening on the reach shaft 10 side is closed by the closing member 16, and the blade edge 12 cross section is also closed by the closing member 17.

  And the front-end | tip of the filling hose 19 of a backfilling material is opened in the cross-section of the blade edge 12 obstruct | occluded with the closure member 17. FIG.

  In this state, the traction jack 14 is operated to pull the blade edge 12 and the cylinder 8 toward the start shaft 9, and the cylinder 8 is moved by the traction and transferred to the gap formed at the rear by the filling hose 19. The backfill material 18 is filled (see FIG. 5). As the backfill material 18, fluidized soil, asphalt mastic, bubble mortar, bentonite, earth or sand mixed with bubbles, or coal ash is used, for example.

  The pulling operation and the filling operation are gradually performed simultaneously to adjust the balance between the filling amount of the backfilling material 18 and the moving amount by pulling the cylindrical body 8.

  When the cylindrical body 8 returns to the starting shaft 9 in this way, the cutting edge 12 and the cylindrical body 8 are collected at the starting shaft 8 and the construction is completed. During this time, the demolition and removal of the underground buried object 2 and the excavation of the earth and sand are limited to the inside of the cylindrical body 8, so that the construction range can be minimized and the work can be completed within the dry season of the river.

  In addition, although the said 1st Embodiment performed the forward movement of the blade edge | tip 12 and the cylinder 8 by the traction with the traction jack 14 arrange | positioned in the reaching shaft 10, it is not limited to this, As 2nd Embodiment As shown in FIG. 6, propulsion can be performed by a main push by a propulsion jack 7 installed in the start shaft 9. In the figure, 11 indicates a reaction force wall.

  Also in this case, the starting shaft 9 and the reaching shaft 10 are provided, and the cylinder 8 is penetrated to the reaching shaft 10 by the propulsion jack 7 propelled from the starting shaft 9 and advanced.

  In the first and second embodiments, since the length of the underground buried object 2 is large enough to completely cross the river embankment 1, in order to remove the underground buried object 2, the underground buried object The starting shaft 9 and the reaching shaft 10 are constructed at positions where both ends of the object 2 protrude, but when the underground buried object 2 is short in length, as shown in FIG. The tip of the underground buried object 2 does not protrude from the reaching shaft 10.

  In such a case, as shown in FIGS. 8 and 9, as shown in FIGS. 8 and 9, the tow jack 14 is installed in the reach shaft 10 as the third embodiment, and the underground body 2 is pulled into the cylinder 8 by pulling the cylinder 8 from the start shaft 9. In the same manner as in the first embodiment, the underground buried object 2 is demolished, the soil is excavated, and the soil is removed in the same manner as in the first embodiment.

  And if the cylinder 8 arrives at the front-end | tip of the underground embedment 2 and the removal of the underground embedment 2 is completed, the state where the blade edge 12 and the cylinder 8 do not reach the reaching shaft 10 but are in the ground. However, at this point, the forward stop is stopped, the blade edge 12 and the cylinder 8 are not propelled to the reaching shaft 10, and the tow jack 14 is moved to the start shaft 9 as shown in FIG. The cylindrical body 8 is pulled back to the start shaft 9 side by the jack 14, and the backfill material 18 is filled in the space after the cylindrical body 8 is moved.

  In this third embodiment, since the underground buried object 2 does not penetrate to the reaching shaft 10, when the pulling jack 14 is pulled back, it is necessary to close the opening on the reaching shaft 10 side with the closing member 16 as in the first embodiment. There is no workability.

  FIG. 11 shows a fourth embodiment. When the underground buried object 2 is short as in the third embodiment, the reaching shaft 10 is not provided, only the starting shaft 9 is provided, and the propulsion jack 7 is provided here. When the blade 8 and the cylinder 8 are propelled by the propulsion jack 7 and the cylinder 8 reaches the tip of the underground buried object 2 and the removal of the underground buried object 2 is completed, the blade edge 12 and The forward movement is stopped at this point while the cylinder 8 is in the ground, and the propulsion jack 7 is pulled back to the start shaft 9 side.

  In the case of this 4th Embodiment, since a reach shaft is not provided, workability further improves.

It is a vertical side view which shows 1st Embodiment of the removal recovery method of the underground embedment of the present invention. It is a vertical side view at the time of underground buried object removal which shows 1st Embodiment of the removal restoration method of underground buried object of this invention. It is a vertical side view at the time of backfilling which shows 1st Embodiment of the removal restoration | recovery method of the underground buried object of this invention. It is the sectional view on the AA line of FIG. 2 which shows embodiment of the removal recovery method of the underground buried object of this invention. It is the BB sectional drawing of FIG. 3 which shows embodiment of the removal recovery method of the underground embedment of this invention. It is a vertical side view which shows 2nd Embodiment of the removal recovery method of the underground embedment of the present invention. It is a vertical side view which shows 3rd Embodiment of the removal recovery method of the underground embedment of the present invention. It is a vertical side view at the time of the underground buried object removal start which shows 2nd Embodiment of the removal restoration method of the underground buried object of this invention. It is a vertical side view at the time of underground buried object removal which shows 2nd Embodiment of the removal recovery method of underground buried object of this invention. It is a vertical side view at the time of the backfill which shows 2nd Embodiment of the removal recovery method of the underground embedment of the present invention. It is a vertical side view which shows 4th Embodiment of the removal recovery method of the underground embedment of the present invention. It is a vertical front view which shows the removal method of the underground embedment by the conventional open cut system. It is a vertical side view which shows the removal method of the underground embedment by the conventional open cut system. It is a cross-sectional top view which shows the removal method of the underground buried object by the conventional open cut system. It is a vertical front view which shows the removal method of the underground embedment by the conventional mountain retaining method. It is a vertical side view which shows the removal method of the underground buried object by the conventional mountain retaining system. It is a cross-sectional top view which shows the removal method of the underground embedment by the conventional mountain retaining method. It is a vertical front view which shows the removal recovery method of the underground embedment of the present invention. It is a vertical side view which shows the relationship between the shaft and the underground burial of the underground restoration removal method of this invention. It is a cross-sectional top view which shows the relationship between the shaft of the underground restoration removal method of this invention, and an underground embedment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 River embankment 2 Underground material 3 Cutting beam 4 Retaining wall 5 River 6 Temporary cutoff revetment 7 Propulsion jack 8 Cylindrical body 9 Starting shaft 10 Reaching shaft 11 Reaction wall 12 Cutting edge 13 Bearing wall 14 Traction jack 15 PC steel wire 16 Closing member 17 Closing member 18 Backfill material 19 Filling hose

Claims (6)

  The underground structure is surrounded by a cylinder with a cross-section covering the underground structure, and the underground structure is demolished and earth and sand excavated and removed in the cylinder while the cylinder is advanced from the start shaft. A method for removing and recovering an underground object, wherein after completion of the demolition, the space after moving the cylinder is backfilled while returning the cylinder to the start shaft side.   The underground body is surrounded by a cylinder having a cross section that encompasses the underground object, and the underground object is demolished in the cylinder while the cylinder is pulled from the start shaft by the traction equipment installed in the reach shaft, and is advanced in the ground. It is characterized by excavation and removal of earth and sand, and after the demolition of the underground structure is completed and the cylinder reaches the arrival shaft, the space after moving the cylinder is refilled while pulling the cylinder back to the start shaft How to remove and recover underground objects.   The underground structure is surrounded by a cylinder with a cross-section that includes the underground object, and the cylinder is pushed by the propulsion equipment installed in the start shaft, and the underground object is demolished and the earth excavated and removed while moving forward in the ground. After removing the underground structure and completing the demolition of the underground structure, the method of removing and recovering the underground structure is characterized by refilling the gap after moving the cylinder while returning the cylinder to the start shaft side. .   The underground structure is surrounded by a cylinder with a cross-section that includes the underground structure, and the underground structure is torn down and excavated and removed in the cylinder while the cylinder is pulled from the start shaft by a towing facility and advanced underground. A method for removing and recovering an underground structure, characterized in that, after completion of the demolition of the underground structure, the space after moving the cylinder is backfilled while returning the cylinder to the start shaft side.   The underground structure is surrounded by a cylinder with a cross-section that includes the underground object, and the cylinder is pushed by the propulsion equipment installed in the start shaft, and the underground object is demolished and the earth excavated and removed while moving forward in the ground. A method for removing and recovering an underground structure, characterized in that, after completion of the demolition of the underground structure, the space after moving the cylinder is backfilled while returning the cylinder to the start shaft side.   The method for removing and recovering an underground object according to any one of claims 1 to 5, wherein the cylindrical body has a blade edge at a tip, and the blade section is closed when the tubular body is pulled back.

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