JP4645438B2 - Continuous groove drilling method - Google Patents

Description

The present invention relates to drilling method continuous groove for cutting drilling a groove continuous in the ground.

  As a continuous groove excavator for excavating continuous grooves in the ground, a gate-shaped support frame 2 is attached to a base machine (for example, a crawler crane base machine) 1 having a self-propelled function as shown in FIGS. A chain cutter type excavator 4 is attached to the support frame 2 via a leader 3 so as to be movable up and down, and the base machine 1 is moved laterally while the excavator 4 is installed in the ground and rotated to form the continuous groove G. What is excavated is well-known (refer patent document 1).

  The excavator 4 is configured by spanning a chain 8 with an excavating blade between upper and lower rollers 6 and 7 provided on both upper and lower sides of the cutter post 5 so as to freely rotate in the vertical direction. It is rotationally driven by a hydraulic motor (not shown).

  In general, a traversing cylinder (hydraulic cylinder) (not shown) is attached between the support frame 2 and the leader 3, and the excavating apparatus combines the self-running function of the base machine 1 and the leader horizontal movement function of the traversing cylinder. 4 is moved horizontally.

  According to the excavation method using this continuous groove excavator, there is an advantage that a linear continuous groove can be excavated efficiently.For example, when excavating a continuous groove on the outer periphery of a rectangular region, a corner portion (one side Processing at the end point and the start point of the other side was a problem.

FIG. 8 shows a state in which the excavator has reached the end point of one side of the continuous groove G.
(i) The excavator 4 is pulled out from the ground with a crane and removed from the leader 3, and then the base machine 1 is retracted from the corner,
(ii) Instead, a vertical hole excavator such as an earth auger is introduced into the corner to excavate the vertical hole,
(iii) In place of the vertical hole excavator, the continuous groove excavator is re-introduced into the corner portion in a direction different by 90 ° from the previous one,
(iv) The drilling device 4 was again attached to the reader 3 and installed in the vertical hole, and the procedure of resuming the drilling of the continuous groove was taken.

On the other hand, when a machine having a turning function such as a crane base machine is used as the base machine 1, a method of excavating a corner portion in an arc shape by using a turning motion of an upper turning body is also known (Patent Document). 2).
JP-A-5-280043 JP-A-6-158663

  However, according to the method of excavating the vertical hole by exchanging the excavator at the corner from the continuous groove excavator to the vertical auger such as an earth auger as described above, two types of excavators must be used properly at one site. In addition to the high cost, the excavator needs to be replaced significantly, so that the work efficiency is significantly reduced.

  On the other hand, according to the method of excavating in an arc shape, the excavator is only one continuous groove excavator, and exchanging the excavator is unnecessary, so the work efficiency has a good advantage, but the linearity of the corner ( (Squareness) is lost, and there is a difficulty in practicality such that it may not be recognized in construction.

  Further, not only the corner portion but also a vertical hole excavator is necessary when excavating a vertical hole which is the starting point of the continuous groove, and thus the same problem as that in the corner portion has occurred.

  Furthermore, as a problem of vertical hole excavation itself, the conventional method using a vertical hole excavator with an excavator attached to a base machine such as an earth auger cannot be used for large and heavy excavators in narrow or soft ground. Then there was a problem that it could not be used.

  By the way, it can be considered that the excavator 4 is detached from the continuous groove excavator shown in FIGS. 7 and 8 and the excavator 4 is suspended by a suspension device such as a crane to be used alone as a vertical hole excavator.

  However, this method is not suitable for practical use in terms of quality and work efficiency because the position (vertical hole position) and direction (excavation direction) of the excavator 4 become unstable due to excavation resistance.

The present invention is to provide a narrow隘地and regardless of site conditions in soft ground such as excavation how continuous groove continuous groove can be efficiently drilled at low cost, including the starting point or a corner portion is there.

The present onset Ming, between the rolling wheels provided on both upper and lower sides of the cutter post, the chain with digging edge, constituting the excavating device body bridged while drilling a vertical hole in the ground by rotating in the vertical direction At the same time, the excavator body is mounted on a reader attached to the base machine via a support frame to form a continuous groove excavator, and the excavator body is moved in a transverse manner while being built in the ground. In a continuous groove excavation method for excavating a continuous groove in the ground, the excavator body is suspended from the leader and removed from the leader when the continuous groove starts to be excavated or moved to a new side at the corner, while the surface layer of the formation is removed. A cylindrical guide member is embedded in the section, and after excavating a vertical hole in the ground with the excavator body inserted into the guide member, the excavator body is pulled out of the vertical hole and is used as the leader. Together to reconstruct the continuous excavator by mounting, remove the guide member from the vertical hole, drilling apparatus body is to shift to the continuous excavating is built up in the vertical hole.

According to the onset bright, upon transition to a new side of the drilling start or corner portion of the continuous groove, remove the drilling apparatus body from a reader of continuous excavator, in a state of hanging in hanging device, the ground surface layer portion drilling a vertical hole in the ground while guided by embedding the cylindrical guide member, after the vertical hole drilling, with removal of the guide member from the vertical hole, to migrate drilling apparatus body mounted again to continuous groove drilled reader Therefore , high- quality continuous grooves can be excavated efficiently at low cost even in narrow or soft ground where large and heavy excavators are difficult to enter .

1 to 3 show the excavation procedure by this method. Here, a case where a vertical hole is excavated at the corner portion of the continuous groove and the transition from the vertical hole to the continuous groove excavation of the next side is taken as an example.

Moreover, the structure of the excavation apparatus used for this excavation method is shown in FIGS.

As shown in FIGS. 1 and 3, the excavator used in this method is like a conventional continuous groove excavator, and has a portal shape in a base machine 11 having a self-propelling function (for example, a crawler crane base machine). is attached to the support frame 12, it becomes the support frame 12 through the reader 13 chain tool drilling apparatus main body (corresponding to the drilling apparatus of the conventional machine) 14 mounted vertically movably, the earth the excavation apparatus main body 14 The continuous groove G is excavated by moving the base machine 11 laterally while being built and rotated.

  The configuration of the excavator main body 14 is basically the same as that of the excavator 4 shown in FIGS. 7 and 8, and a chain 18 with an excavating blade is disposed in the vertical direction between the rollers 16 and 17 provided on the upper and lower sides of the cutter post 15. The upper roller 16 on the drive side is rotationally driven by a hydraulic motor (not shown).

  The excavator main body 14 is detachably attached to the reader 13 at its upper part, and is lifted and removed from the reader 13 by a lifting device 19 (only a hanging hook portion is shown in FIGS. 1 and 2) when appropriate. The

  In addition, as the lifting device 19, a crane used for cargo handling work is usually used at the site of continuous groove excavation work.

  The excavator is constituted by an excavator main body (hereinafter simply referred to as a main body) 14, a suspension device 19, and a guide member 20 (see FIGS. 4 to 6) embedded in the ground surface layer portion of the excavation point. The

  The guide member 20 is formed in a rectangular tube shape having a size in which the main body 14 is inserted and the main body 14 can be restrained from moving back and forth and including left and right (including inclination) in the inserted state.

  The guide member 20 is provided with a protective member 21 at almost all corners on the inner side, so that wear or damage to the inner wall of the guide member due to contact with the main body 14 (particularly the excavating blade of the chain 18) is caused by this protective member 21. ... prevented by.

  These protective members 21 are replaced according to wear and damage. In addition, inclined guide portions 21a (see FIG. 6) for guiding the entrance and exit of the excavating blade are formed at both upper and lower end portions of the protection member 21.

  When the guide member 20 is installed, the guide member 20 is embedded by excavating a hole A (see FIGS. 4 and 6) with a shovel or the like at a vertical hole excavation point and held so as not to move from this position.

  In this case, if the outer peripheral clearance of the hole A is backfilled, the guide member 20 can be substantially fixed by earth pressure, but in addition to this, the following holding means can be taken.

  When excavating the continuous groove, core material holding frames 22 and 22 such as H-shaped steel called rulers are usually installed on the ground surface on both sides of the planned excavation line. , 22, the core material suspension bar is spanned at regular intervals, and the core material is suspended.

  Therefore, as shown in the figure, the stoppers 23, 23 are attached to the upper ends of both front and rear sides of the guide member 20 by a clamp or the like (not shown), and the guide member 20 is embedded in the hole A to hold the stoppers 23, 23 as the core material. Hang on the upper surfaces of the frames 22 and 22 and bridge the stoppers 24 and 24 between the core material holding frames 22 and 22 with the guide member 20 sandwiched from the left and right sides. .

  Thereby, the guide member 20 can be embedded in the ground surface layer portion in a state where the position of the guide member 20 is restricted in the front-rear and left-right directions.

  Alternatively, when the core material holding frames 22 and 22 are not installed, a holding member assembled in a cross beam shape may be installed at the excavation point, and the guide member 20 may be held by the holding member.

  Next, the excavation procedure will be described.

  FIG. 1 (a) shows a state where the continuous groove G has been excavated to the end point of one side by the continuous groove excavator.

  From this state, as shown in FIG. 2B, the excavator body 14 is suspended by the suspension device 19 and separated from the leader 13 of the base machine 11, and the base machine 11 is retracted to a position that does not interfere with the subsequent vertical hole excavation.

  In this state, the guide member 20 is buried by digging a hole A in the ground surface layer at the corner as shown in FIG.

  Next, as shown in FIG. 2 (a), the excavator body 14 suspended by the suspension device 19 is set directly above the guide member 20, and inserted into the guide member 20 as shown in FIG. To start.

  (C) shows a state in which the excavation of the vertical hole H has progressed. When the vertical hole excavation to a predetermined depth is completed, the excavator main body 14 is pulled out from the vertical hole H and the guide member 20 is taken out.

  Thereafter, as shown in FIG. 3, the retracted base machine 11 is set again at the corner portion in the direction changed by 90 °, and the excavator body 14 is attached to the leader 13 to re-install the continuous groove excavator. The main body 14 is again built in the vertical hole H, and a transition to continuous groove excavation on the next side is made.

  The main body 14 may be pulled out and reattached to the reader 13 when the main body 14 is short or the like by the suspension device 19 as a whole, or when the main body 14 is long, when the continuous groove is excavated. As in the case of erection and extraction, the main body 14 may be divided into a plurality of sections and sequentially performed while being separated / connected.

  In this way, in the corner portion of the continuous groove G, the excavator body 14 is suspended by the suspension device 19, and the vertical hole H is formed in the ground while being guided by the cylindrical guide member 20 embedded in the ground surface layer portion. Since excavation is performed, a shift in the position of the main body 14 and the excavation direction due to the excavation reaction force can be reliably prevented.

  That is, a high-quality vertical hole H can be efficiently excavated at each point of position, size, and verticality.

  In addition, it is possible to perform excavation consistently using only a continuous groove excavator, and it is not necessary to use two types of excavators, a continuous groove excavator and a vertical hole excavator, so the construction cost is significantly reduced and the continuous groove excavator is reduced. The efficiency of excavation work can be greatly improved.

By the way, in the above embodiment, the case where a vertical hole that is the starting point of the next side is excavated in the corner portion of the continuous groove is taken as an example, but it is necessary to excavate a vertical hole that becomes a foothold even at the first excavation point of the continuous groove, The present invention can also be applied to vertical hole excavation at the excavation start point .

In this case, according to this excavating method, for vertical hole excavating in a state of hanging the apparatus 19 hanging excavating device main body 14, even in the difficult narrow areas or soft ground penetration whole excavator in terms of size or weight, hanging If it is within the work range of the device 19 (work radius in the case of a crane), excavation of a vertical hole is possible.

  Moreover, in the said embodiment, although the case where the excavator main body 14 was suspended with a suspension hook was taken as an example, you may make it attach the main body 14 to the front-end | tip of a crane boom, for example.

(A), (B), and (C) are schematic front views showing excavation procedures by the excavation method according to the embodiment of the present invention. (A), (b), and (c) are schematic front views showing the excavation procedure following FIG. FIG. 3 is a schematic plan view showing an excavation procedure following FIG. 2. FIG. 3 is a partially enlarged view of the state of FIG. It is the VV sectional view taken on the line of FIG. It is the VI-VI sectional view taken on the line of FIG. It is a schematic front view for explanation of Kezukata method digging conventional continuous groove. It is the same schematic plan view.

DESCRIPTION OF SYMBOLS 11 Excavator base machine 12 Support frame 13 Leader 14 Excavator body 15 Cutter post 16, 17 Rotating wheel 18 Chain 18 Lifting device 20 Guide member

Claims (1)

The excavator body is constructed by laying a chain with excavating blades between the wheels provided on the upper and lower sides of the cutter post in a state of rotating vertically to excavate a vertical hole in the ground. The main body is mounted on a reader attached to the base machine via a support frame to constitute a continuous groove excavator, and the continuous excavator body is moved in the ground while the excavator body is built in the ground. In the continuous groove excavation method, the excavator body is suspended from the leader by suspending it from the leader while starting the excavation of the continuous groove or moving to a new side at the corner portion, while being cylindrical in the surface layer of the formation After excavating a vertical hole in the ground with the excavator body inserted into the guide member, the excavator body is pulled out of the vertical hole and reattached to the leader. Together to reconstruct the continuous excavator by, the guide members removed from the vertical hole, drilling method continuous grooves drilling apparatus main body, characterized in that transition to continuous excavating is built up in the vertical hole.

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