JP2007113390A - Tool for forming construction joint part of underground wall and method of constructing construction joint part of underground wall - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tool for forming a construction joint part of an underground wall and a method of constructing the construction joint part of the underground wall, wherein the construction joint part of the underground wall can be formed simply and easily, while a quality of a panel and a shear strength of the construction joint part can be properly assured. <P>SOLUTION: The construction joint part forming tool of the underground wall, whose two ends are buried respectively in a preceding placed panel and a subsequent placed panel of the underground wall, detachably holds a joint fitting for joining the preceding placed panel and the subsequent placed panel to each other and is releasably fixed on the preceding placed panel. The joint fitting is a corrugated iron sheet while the corrugated shape is kept successively along the depth direction of the underground wall. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention can easily and easily form a joint portion of an underground wall, and can appropriately ensure the quality of the panel and the shear strength of the joint portion. Further, the present invention relates to a method for constructing a joint portion of an underground wall.

  Conventionally, when constructing underground walls, and in particular constructing joints that can transmit shear forces between the underground walls, as shown in FIG. In this case, the rear panel d is handed over by using the uneven surface c formed by the shaving as a joint part.

  By the way, in such a joint portion of the underground wall, it is conceivable to increase the thickness of the underground wall and the inner wall in order to increase the shear strength of the joint portion, but this may lead to an increase in cost. There is.

  The present invention was devised in view of the above circumstances, and can easily and easily form the joint portion of the underground wall and improve the quality of the panel and the shear strength of the joint portion. It is an object of the present invention to provide an underground wall joint forming tool and a method for constructing the underground wall joint.

  In order to achieve such an object, the main underground wall joining portion forming tool of the present invention includes a front panel and a rear panel, both ends of which are embedded in the front panel and the rear panel, respectively. The joint hardware for joining together is detachably held, and is a joint part forming tool for the underground wall that is releasably secured to the advance panel, wherein the joint hardware is a corrugated iron plate, The corrugation is held so as to be continuous in the depth direction of the underground wall.

  Further, in order to achieve such an object, the main underground wall jointing method according to the present invention is such that both ends are embedded in the front panel and the rear panel of the underground wall, and the front panel and the rear panel are embedded. A step of detachably holding a corrugated iron plate for joining the panels to the joint-forming tool so that the corrugation is continuous in the depth direction of the underground wall, and the joint-forming tool A first step of burying one end of the corrugated iron plate to the advance panel and fixing the corrugated iron plate, and constructing the advance panel; from the front panel while detaching the joint forming tool from the corrugated iron plate A third step of peeling and a fourth step of constructing the post-coating panel while burying the other end of the corrugated iron plate are provided.

  It is possible to easily and easily form the joint part of the underground wall and improve the quality of the panel and the shear strength of the joint part. It is possible to provide a joint construction method.

  At least the following matters will be made clear by the present specification and the accompanying drawings.

  The joint forming tool for the underground wall has both ends embedded in the front panel and rear panel of the underground wall, and the joint hardware for joining the front panel and rear panel to each other is detachable. And is fixed to the above-mentioned advance panel in a peelable manner.

  Further, the metal fitting is a plate material, and the plate material is projected to the front panel side and the rear panel side. The plate member has a fixing portion for fixing the plate member to the leading panel and the trailing panel.

  Alternatively, the joint hardware is a reinforcing bar group, and the reinforcing bar group is connected in the depth direction of the underground wall by a connecting member while projecting to the leading panel side and the trailing panel side.

  Moreover, the said metal fitting is provided in the joint part of the said leading panel and the said back panel, and the water stop member which stops the water of the said joint part is provided.

  Further, the joint forming part for the underground wall is disposed at the joint of the leading panel and the trailing panel, and when the one end of the joint metal is embedded in the leading panel, When the other end of the metal fitting is fixed and embedded in the post-fired panel, it is peeled off from the front-fired panel while being detached from the metal fitting.

  The joint wall forming tool for the underground wall holds the joint metal in a state in which one end is exposed in the drilling hole for the front panel and the other end is housed therein.

  In addition, the joint forming tool for the underground wall includes a peeling base plate disposed in the front panel cutting hole and facing the rear panel cutting hole side, and a tip of the peeling base plate. And a storage portion that is disposed on the punching panel hole side and stores the other end of the metal joint.

  In addition, the joint forming tool for the underground wall is protruded from the peeling base plate to the front panel cutting hole side between the storage portion and the peeling base plate, A convex member is provided that forms an engaging recess for engaging the post-work panel.

  Moreover, the said accommodating part is a groove | channel which pinches | interposes the other end of the said metal fitting, The sealing part which prevents the inflow of the concrete into this groove | channel is provided between these grooves and the metal fitting.

  Further, the underground wall joining portion forming tool is provided with a weir member that prevents the concrete from flowing out from the gap between the front panel cutting hole.

  Further, the joint portion forming tool for the underground wall is supported in the drilling hole for the leading panel, with the upper end protruding upward from the drilling hole for the leading panel suspended by a hanging jig. .

  A method for constructing a joint portion of an underground wall, in which both ends are embedded in a front panel and a rear panel of the underground wall, and a joint hardware for joining the front panel and the rear panel to each other is provided. A first step of preparing a joint portion forming tool for the underground wall that is detachably held; and fixing the joint portion forming tool to the leading panel while embedding one end of the joint hardware. A second step of constructing a punched panel; a third step of separating the joint-forming tool from the joint panel while detaching the joint-forming tool from the joint metal; and the post-paneling panel while burying the other end of the joint metal And the fourth step of constructing.

  Further, in the second step, the joint forming tool is disposed at a joint with the rear panel in the excavated front panel drilling hole, and then the front panel is drilled into the front panel drilling hole. Concrete for panel construction is placed, and in the third step, the joint forming tool is peeled off from the drilled panel drilling hole side and the other end of the joint hardware is placed in the drilled panel drilling hole. In the fourth step, the concrete for constructing the post-casting panel is placed in the hole for the post-casting panel.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Preferred embodiments of an underground wall joining part forming tool and an underground wall joining part construction method according to the present invention will be described below with reference to the accompanying drawings. The construction procedure of the underground wall, for example, the continuous underground wall, will be roughly explained. First, a drilling hole for a front panel is excavated, and a reinforcing bar is inserted into the front panel panel, and a rear panel The joint-forming tool is placed at the joint part, and then the concrete is placed in the cut-out hole for the advance panel to construct the advance panel. After that, removal of the joint forming tool from the joint and excavation of the hole for the post-cast panel, and the concrete is placed after inserting the reinforcing bar in the hole for the post-panel Then, the back panel is constructed by succeeding the front panel.

  Hereinafter, the present embodiment will be described in accordance with the above construction procedure. First, an underground wall joining portion forming tool 101 as shown in FIG. 1 is prepared. As shown in FIG. 2, the joining portion forming tool 101 has both ends 5a and 5b embedded in the panels 3, 4 at the joining portion between the leading panel 3 and the trailing panel 4 of the continuous underground wall 2, respectively. In order to join the leading panel 3 and the trailing panel 4 to each other, the joint metal 5 arranged so as to straddle between the two is detachably held and fixed to the leading panel 3 so as to be peelable. The

  This joining portion forming tool 101 is formed long in the depth direction of the underground wall (see FIG. 23), and a strip-like base plate for strip 106 made of steel, and one surface of this base plate 106, It comprises a plurality of strips 109a to 109c welded to each other at intervals to form a groove 108 between them. In the illustrated example, the strips 109a to 109c are substantially V-shaped strips 109a on the left and right sides of the central U-shaped strip 109b so that a substantially C-shaped planar outline is formed. , 109c are disposed.

  Further, as shown in FIG. 3, a corrugated iron plate 105 is used as the bonding hardware 5. The corrugated iron plate 105 is formed along the groove 108 to be long in the depth direction of the underground wall corresponding to the length of the joint forming tool 101, and the groove is formed so that the corrugation continues in the depth direction of the underground wall. Installed in. In the corrugated iron plate 105, the concrete of the front panel 3 and the rear panel 4 wraps around the corrugated concave and convex portion 105a so that the concave and convex portions 105a are joined to the corrugated portion 105a. It functions as a fixing unit that improves the fixing of the image. And even if it exists in this corrugated iron plate 105, it functions as a shear connector which connects the leading panel 3 and the trailing panel 4 firmly.

  Further, the corrugated iron plate 105 is positioned at the opening position of the groove 108 of the strips 109a to 109c to be the joint portions of the front panel 3 and the rear panel 4, and the water stop member for stopping water at the joint portion. 111 is provided. Specifically, the water blocking member 111 is formed in a band plate shape with rubber or the like, and is provided on the front and back of the corrugated iron plate 105 along the corrugation over the entire length of the groove 108. Thereby, it is possible to prevent water leakage and the like reaching the inside and outside of the underground wall on both surfaces of the corrugated iron plate 105 reaching the substantially entire length in the depth direction of the underground wall. Further, the water stop member 111 is pressure-bonded to the groove 108 by the elasticity of rubber so that the corrugated iron plate 105 has a good detachability with respect to the groove 108. Furthermore, the water stop member 111 also functions as a sealing portion that prevents the inflow of concrete into the groove 108 by being pressed against the groove 108 by its elasticity, and the foreign material is attached to the corrugated iron plate 105 before being embedded in the post-panel 4. Can be prevented from adhering.

  FIG. 4 and FIG. 5 show another form of the underground wall joint forming tool 201. As shown in FIG. 5, the joining part forming tool 201 uses a plate material 205 called an anti-slip steel plate (made by Shinko Construction Materials Co., Ltd .: trade name) or the like, as shown in FIG. The plate member 205 is formed with a large number of holes 206 vertically and horizontally at appropriate intervals over the entire plate surface, and in a staggered arrangement corresponding to the positions of the holes 206, the plate member 205 is recessed from one side and the other. A concavo-convex portion 207 is formed so as to protrude. This plate member 205 is also formed to be long in the depth direction of the underground wall, corresponding to the length of the joint portion forming tool 201, and is attached in the groove 108.

  In this plate material 205, the concrete of the front panel 3 and the back panel 4 is filled around the hole 206 and is engaged with the concave and convex portion 207 so that they are joined together. The concave and convex portion 207 functions as a fixing portion that enhances fixing of the metal joint to the panels 3 and 4. And even if it exists in this board | plate material 205, it functions as a shear connector which connects the leading panel 3 and the trailing panel 4 firmly. Further, even in the case of the corrugated iron plate 105, the plate member 205 is located at the opening position of the groove 108 of the strip material 109 to be the joint portion of the leading panel 3 and the trailing panel 4. A water stop member 111 for stopping the water is provided, and the water stop member 111 provides a similar action.

  6 to 10 show still another form of the underground wall joining portion forming tool 301. The joint forming tool 301 includes a steel strip-like peeling base plate 306 and a convex member made of a substantially C-shaped steel channel member attached to one surface of the base plate 306 by welding. 307 and a steel strip 309 having a pair of grooves 308 formed at an interval and being welded and joined to the convex member 307 on the opposite side of the peeling base plate 306, It is formed long in the depth direction of the underground wall (see FIG. 23).

  A metal joint 5 is provided in each groove 308 of the strip 309. As shown in FIGS. 8 to 10, the metal joint 5 is constituted by a reinforcing bar group in which a plurality of reinforcing bars 305 are arranged, and one end 305 a of the metal fitting 5 is removed from the groove 308 so as to be exposed in the pre-cut panel hole 3 a. The other end 305b is sandwiched and housed in a groove 308 that functions as a housing portion, that is, is housed and provided inside the joint forming tool 301.

  As the reinforcing bar 305, round steel or the like formed into an annular shape, in the illustrated example, a rectangular annular shape is used. However, it is needless to say that the reinforcing bar 305 may be a rod-like one as it is or processed into another form. The reinforcing bars 305 of the reinforcing bar group are connected to each other by a connecting member 310 in the depth direction of the underground wall at an appropriate interval.

  The connecting member 310 is formed in a strip shape with a steel plate material or the like, and is formed along the groove 308 in the depth direction of the underground wall corresponding to the length of the joining portion forming tool 301, and is formed of a reinforcing bar group. The reinforcing bars 305 of the metal object 5 are welded and joined to the connecting member 310 and arranged over almost the entire length thereof. In the illustrated example, the reinforcing bar group is attached to one surface of the connecting member 310. Further, the connecting member 310 has an outer contour width of the reinforcing bar 305 so that both ends 305a and 305b in the horizontal direction of the reinforcing bar 305 (both ends 5a and 5b of the metal joint 5) protrude toward the front panel 3 side and the rear panel 4 side. Concrete can be made to wrap around the reinforcing bar 305 which is formed with a narrower width and is exposed outward from the side edge. Thereby, high adhesiveness with concrete is securable. And the reinforcing bar group arranged over substantially the entire length in the depth direction of the underground wall by the connecting member 310 functions as a shear connector that firmly connects the leading panel 3 and the trailing panel 4.

  Furthermore, the reinforcing bars are positioned at the opening position of the groove 308 of the strip material 309 serving as a joint portion between the front panel 3 and the rear panel 4, and the water stop members 311 a and 311 b for stopping the joint portion. Is provided. Specifically, the water stop members 311a and 311b are formed in a strip shape with rubber or the like, and are provided over the entire length of the groove 308 on both sides of the reinforcing bar group. In the present embodiment, a pair of water stop members 311 a and 311 b are attached to both surfaces of the connecting member 310 that connects the reinforcing bars 305. One water stop member 311a is in close contact with the surface of the connecting member 310 while overcoming each reinforcing bar 305 on the side of the reinforcing bar group, and permeates from the side where the reinforcing bar group is joined at the joint shown in FIG. Stop water leaking. Further, the other water stop member 311b is in close contact with the surface on the opposite side of the connecting member 310 so as to stop water leaking from the opposite side of the reinforcing bar group at the joint shown in FIG. It has become. Thereby, on both surfaces of the connecting member 310 that reaches almost the entire length in the depth direction of the underground wall, it is possible to prevent water leakage and the like reaching the inside and outside of the underground wall.

  Further, the water-stop members 311a and 311b on both surfaces of the connecting member 310 are pressure-bonded to the groove 308 by the elasticity of rubber so that the removability of the reinforcing bar 305 with respect to the groove 308 is good. Furthermore, the water-stop members 311a and 311b also function as a sealing portion that prevents the inflow of concrete into the groove 308 by being pressed into the groove 308 by its elasticity. It is possible to prevent foreign matter from adhering to the other end 305b.

  Hereinafter, the case of the joining part forming tool 301 shown in FIGS. 6 to 10 will be described as an example. In the construction site of the continuous underground wall, as shown in FIGS. 12 to 21, the drilling hole 3 a for the leading panel is formed using the excavator 15 lifted by the lifting machine 14 in order to construct the leading panel 3. Form (FIG. 12). Once the pre-cut panel hole 3a is formed, the reinforcing bar 16 is then inserted using the lifting machine 14 (FIG. 13). After that, a pair of prepared joint forming tools 301 are inserted into both ends of the front panel drilling hole 3a, which is a joint between the front panel 3 and the rear panel 4, using the lifting machine 14. (FIG. 14). At this time, the joining portion forming tool 301 is such that after one end 305a of the joint metal 5 made of a reinforcing bar group is exposed in the front panel hole 3a and the groove 308 for housing the other end 305b is not formed. It arrange | positions so that it may be located in the hole 4a side for punching panels. When the joining portion forming tool 301 is installed in the front panel cutting hole 3a, the lifting device 14 is transferred to the hanging jig 17 as shown in FIGS.

  The suspending jig 17 is an erection material spanned between a pair of excavation guide rulers 18 provided on both sides of the hole 3a so as to straddle the hole 3a and the hole 4a to be formed later. 19 and a pair of fixed hardware 20 attached to both ends of the erection material 19 in alignment with both ends of the peeling base plate 306. The fixed hardware 20 is fixed so as not to move by sandwiching both ends of the peeling base plate 306 and tightening with screws as in a vise. At this time, in particular, the joint forming tool 301 has an upper end 301a projecting upward from the front panel cutting hole 3a, and the upper end 301a is held by the fixed hardware 20, so that the front panel cutting is performed. It is supported by the suspension jig 17 in a state of being suspended in the hole 3a. The joint forming tool 301 supported by being suspended is then pressed against the inner surface of the cut-out hole 3a for the front panel by the setting pressure of the concrete for constructing the front panel to be placed in the cut-out hole 3a for the front panel. In addition, the position is further stabilized.

  In addition, the joining portion forming tool 301 is installed such that the lower end portion 301b is spaced from the deepest portion of the front panel cutting hole 3a. The installation of such a joining portion forming tool 301 is set in relation to the peeling means 21 of the joining portion forming tool described later. Specifically, the upper end portion 301a of the joining portion forming tool 301 is protruded upward from the leading panel cutting hole 3a by attaching the peeling means 21 to the joining portion forming tool 301. This is because it is performed not in the hole 3a but in a wide space outside. The lower end 301b of the joint forming tool 301 is separated from the deepest part of the front panel hole 3a when the peeling means 21 reaches the deepest part of the front panel hole 3a. This is because the joint forming tool 301 can be completely peeled off from the leading panel 3 at the mounting position of the penetrating member 22 described later.

  Further, as shown in FIG. 23, it is preferable that the upper end of the metal fitting 5 is slightly protruded from the upper end portion 301 a of the joining portion forming tool 301 in order to ensure separation from the joining portion forming tool 301. Further, in the illustrated example, the lower end portion 301b of the joint forming tool 301 is tapered in order to prevent sedimentation of the concrete slime to be placed in the front panel cutting hole 3a. . Further, as shown in FIG. 21 (b), when the gap between the punched panel forming hole 3a and the leading panel drilling hole 3a is wide as shown in FIG. Further, a weir member 23 is attached to prevent the coarse aggregate which becomes an obstacle in the peeling operation of the concrete, particularly the joint forming tool 301 described later, from flowing out of the gap. As this dam member 23, a tough and flexible metal net material such as rib lath is used, and is stretched between the peeling base plate 306 and the inner surface of the hole 3a.

  When the joint forming tool 301 is thus disposed in the front panel drilling hole 3a, the front panel construction concrete is cast as shown in FIGS. 15 and 10, and the whole is sufficiently cured. To complete the construction of the advance panel 3. By completing the construction of the front panel 3, one end 5 a (one end 305 a of the reinforcing bar) of the metal fitting 5 is firmly embedded in the front panel 3. Also, with respect to the joint forming tool 301, the outer surface of the peeling base plate 306, the convex member 307, and the strip material 309 facing the front panel cutting hole 3a is hardened against the hardened front panel construction concrete. And firmly fixed.

  If the construction of the leading panel 3 is completed in this way, then, as shown in FIGS. 16 and 22, next to the leading panel 3, in the same manner as the formation procedure of the leading panel hole 3 a, The hole 4a for the post-paneling is formed.

  When the forming operation of the post-punching panel hole 4a is completed in this manner, the joint portion tool 301 is then peeled off from the leading panel 3 and removed, as shown in FIGS. As a removing device used for removing the joint portion forming tool 301, it penetrates into a fixing boundary F (see FIG. 22A) between the joint portion forming tool 301 fixed to the leading panel 3 and the leading panel 3. The peeling means 21 for peeling the joint part forming tool 301 from the advance panel 3 will be described first.

  As shown in FIG. 25, in this embodiment, the excavator 15 suspended and lifted by the lifting machine 14 is used as a lifting body. The excavator 15 includes a joint forming tool 301 and a front panel. 3, a penetrating member 22 is provided which is located at the fixed boundary F of 3 and penetrates into the fixed boundary F by the lowering operation of the excavator 15. As shown in FIG. 26, the penetrating member 22 is attached to a grab shell support frame 15a of the excavator 15 in a detachable manner, and is attached to both ends of the attachment frame 24 via support pins 25 so as to be rotatable. And a pair of L-shaped peeling pieces 26.

  The peeling piece 26 includes a base portion 26a into which the support pin 25 is inserted and a claw portion 26b formed by bending from an end portion of the base portion 26a. The peeling piece 26 is attached to the fixing boundary F between the joining portion forming tool 301 and the leading panel 3 in a state where the entire peeling means 21 is attached to the excavator 15 with the mounting frame 24, specifically, FIG. As shown in b), the base portion 26a is located between the side edge of the peeling base plate 306 where the concrete can flow around the joint forming tool 301 and the inner surface of the pre-cut panel hole 3a, and the claw portion 26b. Is further moved around and is positioned between the front panel 3 and the surface of the peeling base plate 306 fixed to the front panel 3, and the base wall 306 of the ground wall is formed on the peeling base plate 306 from the side of the rear panel hole hole 4 a. It engages so as to be slidable in the depth direction, in other words, in the depth direction of the holes 3a, 4a.

  Then, the penetrating member 22 is lifted or dropped into the rear panel drilling hole 4a when the excavator 15 is once lifted by the lifting machine 14 in a state where the penetrating member 22 is aligned with the fixing boundary F position. It penetrates into the fixed boundary F so as to strike a wedge due to inertia. Then, by repeating this penetration operation, the peeling piece 26 gradually peels deeply between the joining portion forming tool 301 and the leading panel 3 and peels the joining portion forming tool 301 from the leading panel 3. When the peeling piece 26 reaches the lowermost end of the peeling base plate 306, the joining portion forming tool 301 is peeled off from the leading panel 3. As shown in FIGS. 27 (a) and 27 (b), the base 26a of the peeling piece 26 may be provided with a bit 27a and a cutter-like blade 27b in order to enhance the penetration action.

  In addition, as shown in FIGS. 28 and 29, the grab shell 15b of the excavator 15 constituting the peeling means 21 is subjected to a peeling work by the penetrating member 22 in order to enhance the penetration action of the claw portion 26b. Particularly, for the purpose of removing in advance a foreign substance such as concrete that has entered the gap between the side edge of the peeling base plate 306 and the front panel cutting hole 3a, cutting is performed as a crushing means at a position corresponding to the gap. A blade 28 may be provided. First, the excavator 15 is once lowered by the lifting machine 14 to start cutting with the cutting blade 28 to clean the gap, and then the peeling work by the lowering operation of the excavator 15 is performed again.

  Further, foreign matters such as mud adhering to the surface facing the post-cut panel hole 4a for the peeling base plate 306 can be scraped off by the excavating blade 15c of the grab shell 15b adjacent thereto. The cutting blade 28 may be provided on the grab shell support frame 15a as shown in FIG. In particular, when it is provided on the grab shell 15b, it is possible to carry out the peeling work with the penetrating member 22 that follows, while cleaning the gap with the preceding cutting blade 28, and with a single descent operation of the excavator 15. It is also possible to complete the peeling operation. Further, when both the cutting blade 28 and the penetrating member 22 are attached to the grab shell support frame 15a, if they are respectively attached to the opposite surfaces of the grab shell support frame 15a, the work can be performed only by inverting the excavator 15. Can be switched. Even in this case, mud etc. can be scraped off by the excavation blade 15c of the grab shell 15b.

  On the other hand, in order to increase the operating efficiency of the excavator 15, it is preferable to use a dedicated peeling means 21. As shown in FIGS. 31 and 32, the peeling means 21 includes a block-like lifting body 29 having a considerable weight in place of the excavator 15 and suspended from the lifting machine 14, and one side surface of the lifting body 29. A penetrating member 22 attached to the upper and lower stages, a scraping blade 30 provided at the lower end of the lifting body 29 below the penetrating member 22 and replacing the excavating blade 15c of the grab shell 15b in the case of the excavator 15, From a similar cutting blade 28 provided between the scraping blade 30 and the penetrating member 22, and another scraping blade 31 provided below the mounting frame 24 of the lower penetrating means 22 Composed.

  The peeling means 21 is also used in the same manner as when using the excavator 15, and the penetrating member 22 is suspended toward the joint forming tool 301, and is peeled off by the scraping blades 30 and 31. The base plate 306 scrapes off foreign matters such as mud on the surface of the post-cut panel hole 4a side of the base plate 306, scrapes off with the cutting blade 28 to clean the gap, and the piercing part forming tool 301 is pre-cut by the penetrating member 22. The panel 3 is peeled off.

  33 and 34 show still another example of the peeling means 21. The peeling means 21 has a penetrating member 22 attached to one side of a lifting body 29 and a rotating drum 32 having a scraping blade 30 and a cutting blade 28 attached to the lower end of the lifting body 19 so as to be freely rotatable. . A number of scraping blades 30 are arranged on the peripheral surface of the rotary drum 32, and a number of cutting blades 28 are arranged on the peripheral edge of the rotary drum 30. The rotary drum 32 is rotationally driven with power supplied from a power source 33 installed outside the drilling holes 3a, 4a, thereby performing a scraping operation and a scraping operation.

  Using the removal device as described above, as shown in FIG. 17, the joint forming tool 301 is peeled off from the advance panel 3 and removed. For example, the excavator 15 is lifted by the lifting machine 14, the cutting blade 28 is aligned with the gap position from above the joint forming tool 1, and the excavating blade 15 c of the grab shell 15 b is also used for the back panel of the peeling base plate 306. The excavator 15 is lowered along the joint forming tool 301 in the post-punching panel drilling hole 4a in accordance with the drilling hole side, thereby first removing foreign matter around the peeling base plate 306 including the gap.

  When this removal operation is completed, the excavator 15 is lifted out of the hole 4a, and the penetration member 22 is engaged with the peeling base plate 306 protruding from the holes 3a, 4a. In this state, by repeatedly lowering and lifting the excavator 15, the penetrating member 22 is successively penetrated deeply into the fixing boundary F between the joint forming tool 301 and the leading panel 3, and the deepest hole 4 a is deepened. By bringing the excavator 15 to reach the part, as shown in FIG. 22 (c), the joint part forming tool 301 is peeled off from the leading panel 3. With this separation, the pressure contact of the water stop members 311a and 311b with respect to the groove 308 is released, and the other end 305b of the metal joint 5 is detached from the joint forming tool 301. The peeled joint forming tool 301 is lifted from the drilling hole 4a by the lifting machine 14 and reused.

  When the joining part forming tool 301 is peeled off from the leading panel 3 in this way, the other end 305b of the metal joint 5 is detached from the joining part forming tool 301 and remains on the leading panel 3 side, and the cutting for the finishing panel is performed. It is exposed in the hole 4a. Further, as the joining portion forming tool 301 is peeled from the leading panel 3, an engaging recess for engaging the leading panel 3 with the leading panel 3 by the convex member 307 is provided at the joining portion of the leading panel 3. 34 is formed.

  When the peeling work of the joining portion forming tool 301 is completed in this way (FIG. 17), as shown in FIG. 18, the reinforcing bar 14 is then used to place the reinforcing bar 16 in the rear panel drilling hole 4a. insert. Then, as shown in FIG. 19, a joining portion forming tool 301 for further paneling is inserted into the paneling hole 4 a for paneling using the lifting machine 14.

  If the reinforcing bar 16 and the joint forming tool 301 are thus arranged in the post-cutting panel hole 4a, the post-strike is performed while the other end 5b of the metal fitting 5 (the other end 305b of the reinforcing bar 305) is buried. Panel construction concrete is placed, and the construction of the post-cast panel 4 is completed as shown in FIG. With the completion of the construction of the post-fired panel 4, the other end 305b of the joint metal 5 is firmly embedded in the post-fired panel 4. Both ends 305a and 305b are embedded in each of the four, and are arranged so as to straddle between both the leading panel 3 and the trailing panel 4, and function as a shear connector between the panels 3 and 4.

  By the operation as described above, the joining of the pair of the leading panel 3 and the trailing panel 4 is achieved, and the construction of the continuous underground wall can be completed by sequentially repeating this.

  In the underground wall joining part forming tool and the underground wall joining part construction method according to the present embodiment, the joining part forming tool 301 can be peeled off to the finished panel 3 completed by curing. The joining portion forming tool 301 is removed, and the joining portion forming tool 301 is removed at an appropriate time whenever the concrete for panel construction is hardened. Peeling work can be carried out, construction management such as work timing can be greatly improved, construction workability of the underground wall can be improved, and accordingly, the quality of the panels 3 and 4 itself In addition, the joining strength of the panels 3 and 4 by the joint metal 5 can be made extremely high as compared with the prior art, and in particular, the joint metal 5 can be easily and easily arranged at the joint. In addition, this joint metal 5 can significantly improve the shear strength of the joint portion, and since it can be expected only to join at the shaving surface of the concrete in the prior art, the shear strength of the joint portion is low. In order to make up for this, it is necessary to increase the thickness of the underground wall or to construct the inner wall, which requires a great deal of labor for constructing the underground structure and necessitates a considerable increase in cost. This problem can be solved all at once.

  In addition, by simply peeling the single piece joint forming tool 301 fixed to the leading panel 3 from the leading panel 3, the joining part forming tool 301 can be detached from the joint metal 5 to the rear panel 4. The arrangement of the joint hardware 5 can be ensured.

  In addition, since the joint forming tool 301 holds the other end 5b (the other end 305b of the reinforcing bar) of the joint metal 5 and also serves as a curing until the construction of the rear panel 4, the construction of the front panel 3 is performed. It is possible to reduce the amount of work and the number of required parts for the time joint part. In other words, the joint forming tool 301 of the present embodiment itself functions as an interlocking pipe and a joint box, has a joint box storage function, and does not require a partition plate. A state in which only the joint metal 5 is exposed from the concrete for building the front panel can be obtained at the joint of the front panel 3 when the piece joint forming tool 301 is peeled off.

  The joining part forming tool 301 mainly includes a peeling base plate 306 and a strip material 309 that forms a groove 308 serving as a storage part for the joint metal 5 and can be easily configured.

  Further, if necessary, a convex member 307 can be provided between the peeling base plate 306 and the strip material 309, whereby the engagement concave portion for strengthening the joint portion between the leading panel 3 and the trailing panel 4 34 can be formed.

  Moreover, the sealing function which prevents the inflow of the concrete into the groove | channel 308 between the groove | channel 308 and the metal fitting 5 between the groove | channel 308 and the metal fitting 5 and the attachment / detachment function with respect to the joining part formation tool 301 by the water stop members 311a and 311b. And can be secured.

  Further, the weir member 23 can prevent the concrete from flowing out, in particular, the coarse aggregate can be prevented from flowing out, and the occurrence of obstacles to the cutting of foreign matter from the gap using the cutting blade 28 or the like can be prevented, thereby forming the joint portion. The peeling work of the tool 301 can be smoothed.

  Further, by using the hanging jig 17, it is possible to transfer the joining part forming tool 1 from the lifting machine 14, and the operating efficiency of the lifting machine 14 can be improved. In addition, since the joining part forming tool 301 is supported by being suspended, it is easy to install the joining part forming tool 301, and the height can be easily adjusted. It can be made to adhere to the inner surface of the hole 3a for the leading panel. Furthermore, since the upper end portion 301a of the joint forming tool 301 is supported by projecting upward from the front panel cutting hole 3a, mounting of the peeling means 21 can be facilitated.

  By embedding the water-stop members 311a and 311b in the joint portions of the panels 3 and 4, the water-stop performance at the relevant portions can be significantly improved. In the present embodiment, the rubber water stop members 311a and 311b have been described as examples, but a general steel plate material or the like may be used.

  In each of the above-described embodiments, a double structure in which two metal fittings 5 are arranged side by side in the wall thickness direction is used. However, when the wall thickness is thin, the shear strength is considered. Then, a single configuration may be used, or when the wall thickness is sufficiently thick, the number may be further increased to 3 or more.

  In short, in the underground wall joining part forming tool and the underground wall joining part construction method according to the present embodiment, the joining part forming tool is cured and peeled off to the finished panel. It is possible to improve the workability of the underground wall and to improve the workability of the underground panel itself. The quality and bonding strength between the panels can be made extremely high compared to the prior art, and in particular, it is possible to easily and easily place the metal fittings on the joints. The shear strength of the joint portion can be remarkably improved.

  In addition, by peeling off the single piece joint forming tool, it is possible to form a joint where only the joint metal is exposed at the joint of the leading panel.

It is a top view which shows one Embodiment of the joint part formation tool of the underground wall concerning this invention. It is a top view which shows the joint part formed using the joint part formation tool of the underground wall of FIG. It is a side view of the corrugated iron plate applied to the joint part formation tool of the underground wall of FIG. It is plane sectional drawing which shows other one Embodiment of the joint part formation tool of the underground wall concerning this invention. It is a front view of the board | plate material applied to the joint part formation tool of the underground wall of FIG. It is a plane sectional view showing other one embodiment of the joint part formation tool of the underground wall concerning the present invention. It is a top view which shows the arrangement structure of the reinforcing bar group, a connection member, and a water stop member which are applied to the joint part formation tool of the underground wall of FIG. It is a partial front view of the arrangement configuration of FIG. It is a sectional side view of the arrangement configuration of FIG. FIG. 7 is a plan cross-sectional view of an end portion of a leading panel formed using the joint forming tool of FIG. 6. It is a top view which shows the joining completion state of the leading panel and the trailing panel. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram illustrating an excavation process, illustrating an embodiment of a method for constructing a joint portion of an underground wall according to the present invention. It is a figure which shows a reinforcement rod insertion process same as the above. It is a figure which shows the insertion process of a joint part formation tool same as the above. It is a figure which shows a concrete placement process same as the above. It is a figure which shows the excavation process of a back-running panel as above. It is a figure which shows the removal process of a joint part formation tool same as the above. It is a figure which shows the reinforcing bar rod insertion process of a back-running panel same as the above. It is a figure which shows the insertion process of a joint part formation tool same as the above. It is a figure which shows the placement start process of concrete placement and the next panel same as the above. It is explanatory drawing explaining the mounting | wearing condition to the drilling hole for the advance panel of the joint part formation tool of the underground wall of FIG. It is explanatory drawing explaining the removal condition from the drilling hole for post-paneling of the joint part formation tool of the underground wall of FIG. It is a side view which shows the suspension jig | tool which supports the joint part formation tool of the underground wall of FIG. It is a top view of the hanging jig | tool of FIG. [BRIEF DESCRIPTION OF THE DRAWINGS] It is a side view of the excavator which shows one Embodiment of the joint part formation tool removal apparatus of the underground wall concerning this invention. It is a top view which shows an example of the penetration member applied to the excavator of FIG. It is a perspective view which shows an example of the bit applied to the penetration member of FIG. It is a side view which shows an example of the cutting blade applied to the excavator of FIG. It is a top view which shows the state which applied the cutting blade of FIG. 28 to the joint part formation tool of the underground wall of FIG. It is a side view which shows the other example of the cutting blade applied to the excavator of FIG. It is a perspective view which shows other embodiment of the joint part formation tool removal apparatus of the underground wall concerning this invention. It is a side view which shows the use condition of the joint part formation tool removal apparatus of the underground wall of FIG. It is a perspective view which shows other embodiment of the joint part formation tool removal apparatus of the underground wall concerning this invention. It is a side view which shows the use condition of the joint part formation tool removal apparatus of the underground wall of FIG. It is a plane sectional view showing the conventional example of the joint part of the underground wall.

Explanation of symbols

DESCRIPTION OF SYMBOLS 2 Continuous underground wall 3 Leading panel 3a Drilling hole for leading panel 4 Finishing panel 4a Drilling hole for trailing panel 5 Joint metal 5a One end of joint metal 5b Other end of joint metal 14 Lifting machine 15 Excavator 15a Grab shell Support frame 15b Grab shell 15c Grab shell excavation blade 16 Reinforcing bar 17 Suspension jig 18 Guide ruler 19 Construction material 20 Fixed metal 21 Peeling means 22 Penetration member 23 Weir member 24 Mounting frame 25 Support pin 26 Peeling piece 26a Peeling piece Base 26b Claw part of peeling piece 27a Bit 27b Cutter-shaped blade 28 Cutting blade 29 Lifting body 30 Scraping blade 31 Scraping blade 32 Rotating drum 33 Power source 34 Engaging recess 101, 201 Jointing part forming tool 105 Corrugated iron plate 105a Corrugated part of corrugated iron plate 106 Peeling base 108 Groove 109a-109c Strip material 111 Water stop member 205 Plate material 206 Hole 207 Concavity and convexity part 301 Joint joint forming tool 301a Upper end part of joint joint forming tool 301b Lower end part of joint joint forming tool 305 Reinforcing bar 305a One end 305b Other end 306 Peeling base plate 307 Convex member 308 Groove 309 Strip material 310 Connecting member 311a, 311b Water stop member F Adhering boundary

Claims (13)

Both ends are embedded in the front panel and back panel of the underground wall, and the joint hardware for joining these front panel and back panel can be detachably held and can be peeled off to the front panel A joint forming tool for the underground wall fixed to
The joint metal fitting is a corrugated iron plate, and is held so that the corrugation is continuous in the depth direction of the underground wall. The said corrugated iron plate protrudes in the said front panel side and the said rear panel side, The joint part formation tool of the underground wall of Claim 1 characterized by the above-mentioned. The corrugated iron plate has a fixing portion for fixing the corrugated iron plate to the leading panel and the trailing panel, and is configured to function as a shear connector that firmly connects the leading panel and the trailing panel. The underground wall joint forming tool according to claim 2, wherein: The ground corrugated wall joint forming tool according to any one of claims 1 to 3, wherein the two corrugated iron plates are provided so that corrugated surfaces face each other. 5. The underground of claim 4, wherein the two corrugated iron plates are provided such that a concave portion and a concave portion of the corrugated surface face each other, and a convex portion and a convex portion of the corrugated surface face each other. Wall joint forming tool. The bonding hardware is provided with a water stop member that is positioned at a joint portion between the front panel and the rear panel, and stops the joint portion,
In the joint portion forming tool for the underground wall, a peeling base plate disposed in the front panel cutting hole and facing the rear panel cutting hole side, and a tip of the peeling base plate It is disposed on the punching panel drilling side, and a storage portion for storing the other end of the joint hardware is provided,
The said water stop member is located between the said joint metal fitting and the said accommodating part, and is comprised so that the inflow of the concrete to this accommodating part may be prevented, The one of Claims 1-5 characterized by the above-mentioned. The joint part formation tool of the underground wall of description. The underground wall joining part forming tool according to any one of claims 1 to 6, wherein the joining part forming tool is disposed at a joining part of the leading panel and the trailing panel, and one end of the joint hardware is attached to the leading part. The underground is fixed to the leading panel when embedded in a panel, and is peeled off from the leading panel while being detached from the bonding metal when the other end of the bonded metal is embedded in the subsequent panel. Wall joint forming tool. The underground wall joining portion forming tool according to any one of claims 1 to 7, wherein one end of the metal fitting is exposed in the drilling hole for the front panel and the other end is accommodated therein. A joint forming tool for underground walls, characterized by being held in a state. The joint forming part for the underground wall according to claim 6 is configured to project from the peeling base plate to the drilling side for the advance panel between the storage portion and the peeling base plate, A joint forming tool for an underground wall, comprising a convex member that forms an engaging recess for engaging the front panel with the rear panel. 9. The underground wall joining portion forming tool according to claim 8, further comprising a weir member that prevents the concrete from flowing out from a gap between the front panel cutting hole. Wall joint forming tool. The underground wall joining portion forming tool according to any one of claims 1 to 10, wherein an upper end portion projecting upward from the drilling hole for the leading panel is suspended by a hanging jig, An underground wall joint-forming tool characterized by being supported in a punching panel hole. The corrugated iron plate for joining the front panel and the back panel to each other is embedded in the front panel and the back panel of the underground wall, and the corrugation is in the depth direction of the underground wall. A step of detachably holding the joint forming tool so as to be continuous;
A second step of constructing the front panel by fixing the splicing part forming tool to the front panel while embedding one end of the corrugated iron plate;
A third step in which the joint forming tool is detached from the front panel while being detached from the corrugated iron plate;
A fourth step of constructing the post-fired panel while burying the other end of the corrugated iron plate;
A method for constructing a joint portion of an underground wall characterized by comprising: In the second step, the joint forming tool is disposed at a joint between the excavated front panel drilling hole and the rear panel, and then the front panel is constructed in the front panel drilling hole. For concrete,
In the third step, the joint forming tool is peeled off from the drilled panel punching side, and the other end of the corrugated iron plate is exposed in the drilling panel drilling hole.
13. The method for constructing a joint portion for an underground wall according to claim 12, wherein in the fourth step, concrete for constructing a post-panel is placed in the post-panel drilling hole.

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