JP2006265827A - Construction method for underground penetration body, and steel-shell element therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To dispense with cut-off-agent injection work for ensuring cut-off properties, when an underground penetration body such as an earth-retaining steel material is constructed from an adit (steel-shell element) constructed in ground, and to save construction labor for preparation work, replacement work, etc., associated with work for pressing in the underground penetration body. <P>SOLUTION: An opening groove 20 along the cross-sectional shape of the earth-retaining steel material 3 is preformed in the part, wherein the steel material 3 is pressed in, of the steel-shell element, and a cut-off device, which is equipped with a cut-off member 23 for closing the opening groove 20, is installed in advance. The earth-retaining steel material to be pressed in is pressed into the ground while the cut-off material 23 is broken, in a state of being connected by means of a joint part 3a of the adjacent already-installed earth-retaining steel material 3, from inside the steel-shell element. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  In constructing underground structures such as subways, caves, joint grooves, underground roads, underground shopping streets, underground parking lots, crossing underpasses, etc. The present invention relates to a method for constructing an underground penetrating body such as a beam and an overburden support material, and a steel shell element therefor.

  Conventionally, an excavation method is known as a method for constructing underground structures such as a subway, a cave, a common ditch, an underground road, an underground mall, and an underground parking lot. In this excavation method, a retaining wall is constructed from the ground at the boundary that divides the excavation area, and the area surrounded by the retaining wall is provided with appropriate road surface covering and beam support work, etc. It is a method of excavating step by step while maintaining stability, building the target underground structure in the space, and then backfilling, and it is also frequently used in excavation work in urban areas.

  However, in recent years, in urban areas, many underground buried objects such as electric power and communication cables, gas, and water and sewage pipes are congested, and construction close to business lines such as underground structures and railways has increased. The construction of underground structures by the open-cut method has become extremely difficult due to the effects of noise and vibration on the surrounding environment.

  In view of such circumstances, there is a method for constructing a retaining wall that allows construction even under conditions where construction of retaining walls from the ground is difficult or impossible due to the presence of underground buried objects and ground structures. Proposed.

  For example, in Patent Document 1 below, after excavating a horizontal shaft (steel shell element) having a vertically long cross section with a shield excavator in a ground where a retaining wall cannot be constructed from the ground, an appropriate thickness is covered in the shaft. After the construction of the tunnel structure, the interior of the tunnel structure is used as a work space, and a waterstop is constructed at the lower part of the tunnel structure, and at least between the upper end of the tunnel structure and the ground surface. A method for constructing underground structures in the excavated underground space has been proposed after applying a mountain retaining process to the ground and excavating by an open-cut method.

Further, in Patent Document 2 below, in order to construct an underground structure by non-open excavation, a horizontal shaft (steel shell element) is excavated by a shield machine in a ground where it is impossible to construct a retaining wall from the ground. Then, a tunnel structure is constructed by appropriately lining the inside of this horizontal shaft, and a retaining wall is constructed with this tunnel structure, and a waterstop is formed in the lower part of the tunnel structure with the inside of the tunnel structure as a work space. And further excavating a plurality of horizontal shafts in the horizontal direction at an appropriate interval in the ground between the upper portions of the retaining wall, and connecting the plurality of tunnel structures to have a continuous internal space After forming a connection structure and fixing an upper structure for supporting an upper load by fixing both ends of the connection structure to the upper part of the earth retaining wall, the connection structure is surrounded by the plurality of earth retaining walls and the connection structure. Excavating in the ground After, a method for constructing underground structures have been proposed in the excavated underground space.
JP-A-8-28197 JP-A-8-86197

  In the method according to Patent Document 1 and Patent Document 2, in constructing the waterstop body, as shown in FIG. 21, first, as shown in FIG. After the agitating blade 51 is used to stir to an appropriate depth by the hole drilling machine 50, and then, as shown in FIG. In addition, a mortar (water-stopping material) is poured into the ground to construct a soil retaining wall having water-stopping properties. In addition, after the H steel material 53 with a joint is first stirred while injecting a water-stopping material (consolidating material) into the ground, it may be press-fitted into an improved region by the water-stopping material. .

  However, the waterstop construction work from the tunnel structure takes time to carry heavy construction equipment and equipment, and is a work performed in a narrow space as a work space, so the work environment is poor and many preparation steps Therefore, it was a very inefficient work, which caused an increase in construction costs and a prolonged construction period. In addition, when installing the retaining steel, it is necessary to arrange a reinforcing material near the bottom of the steel shell element by welding or the like, and to press-fit the retaining steel, an opening must be formed at the bottom of the steel shell element. However, these efforts were a heavy work burden. Furthermore, there are problems such as structural instability of the steel shell element due to the provision of the opening, and an increase in the weight of the steel material due to the provision of the reinforcing material.

  Therefore, the main problem of the present invention is that it is not necessary to inject a water-stopping agent to ensure water-stopping when constructing underground penetrations such as steel for earth retaining from a horizontal shaft (steel shell element) built in the ground In addition, it is intended to greatly save labor in preparation work such as preparatory work and refilling work associated with the press-fitting work of the underground penetrating body.

As the present invention according to claim 1 to solve the above-mentioned problem, it is a construction method for press-fitting an underground penetrating body toward the ground from the inside of a steel shell element built in the ground,
A water-stop device provided with a water-stopping member that previously forms an opening groove along a cross-sectional shape of the underground penetrating body with respect to a press-fitting site of the underground penetrating body in the steel shell element and closes the opening groove. Is provided, and the underground penetration body is press-fitted toward the ground while breaking the water-stopping member from the inside of the steel shell element.

  In the invention of the first aspect, the steel shell element constructed in the ground is provided with an opening groove along the cross-sectional shape of the underground penetrating body in advance and a water stop member for closing the opening groove. In order to press-fit the underground penetrating body, the water-stopping member is pressed from the inside of the steel shell element toward the ground while breaking the water-stopping member. Therefore, before and after the press-fitting of the underground penetrating body, the water-stopping property is ensured, so that the water-stopping material injection work for securing the water-stopping property can be made unnecessary. In addition, it is possible to omit additional work such as adding a reinforcing material or forming a press-fitting opening, thereby saving labor in the press-fitting work.

As the present invention according to claim 2, a construction method for press-fitting a retaining steel material with a joint that forms an underground penetration body from the inside of the steel shell element built in the ground to the ground,
A water stop device provided with a water stop member that preliminarily forms an opening groove along the cross-sectional shape of the retaining steel material and press-fitting the retaining steel material in the steel shell element is provided. In addition, from the inside of the steel shell element, the joint of the retaining steel material to be press-fit is coupled to the joint of the installed retaining steel material, and the retaining steel material is pressed into the ground while breaking the water-stopping member. The construction method of the underground penetration body characterized by this is provided.

  The invention according to claim 2 shows an embodiment in which a retaining steel material with a joint is used as an underground penetrating body. In this case, the retaining steel material is mutually connected with the adjacent retaining steel material. Press-fit into the ground while connecting.

  According to a third aspect of the present invention, in the underground penetrating body construction method according to the second aspect, an underground penetrating body is press-fitted with a retaining steel material previously filled with a water-stopping material in a joint. A construction method is provided.

  In the invention described in claim 3, when performing press-fitting while sequentially connecting the earth retaining steel material to the installed earth retaining steel material, a water-stopping material that does not cause much resistance to the press-fitting is previously filled in the joint before the indentation. Therefore, when press-fitting, the joint on the side to be joined with the joint of the preceding earth retaining steel material ensures the water-stopping property of the joint by leaving the water-stopping material in the joint, and the joint on the non-joined side is stopped. The presence of water material avoids water leakage from the inside of the joint.

  In the construction method of the underground penetrating body according to claim 2, as a present invention according to claim 4, there is provided a joint portion packing material having a joint cross-sectional shape with respect to the unbonded side joint portion of the retaining steel material immediately after press-fitting. When installing and sealing the gap with the water stop member, and then press-fitting the adjacent earth retaining steel material into the ground, the earth retaining steel joint is joined to the installed earth retaining steel joint, and the joint packing is grounded A method for constructing an underground penetrating body is provided, wherein the earth retaining steel material is pressed into the ground while being pushed in.

  In the invention according to the fourth aspect, in the case of performing press-fitting while sequentially connecting the retaining steel material to the already-installed retaining steel material, in the retaining steel material immediately after the press-fitting, water stoppage at the joint portion on the unbonded side is obtained. This is a proposal of a method that is performed while ensuring it at all times. In other words, the joint part packing material that forms the joint cross-sectional shape is installed in the joint part on the unbonded side to seal the gap with the water-stopping member, and the joint of the steel retaining steel material is installed when the next steel retaining steel material is press-fitted It is engaged with a joint of already-clad steel material and press-fitted into the ground while pushing the joint packing into the ground.

  As the present invention according to claim 5, the water stop device includes an easily breakable first water stop member that ensures water stoppage in a state before press-fitting of the underground penetrating body, and after the press-fitting of the underground penetrating body. The construction method of the underground penetration body in any one of Claims 1-4 which consists of a 2nd water stop member which ensures water stop in this state.

  In the invention of claim 5, as the water stop device, an easily breakable first water stop member that ensures water stoppage in a state before press-fitting of the underground penetrating body, and after the press-fitting of the underground penetrator The thing of the double structure comprised from the 2nd water stop member which ensures water stop in this state is used.

  According to a sixth aspect of the present invention, the first water stop member is a thin rubber sheet, and the second water stop member is a rubber packing in which an opening groove is formed along the cross-sectional shape of the underground penetrating body. The construction method of the underground penetration body of claim | item 5 is provided.

  The invention described in claim 6 uses a thin rubber sheet as the first water stop member, and uses a rubber packing in which an opening groove along the cross-sectional shape of the underground penetrating body is formed as the second water stop member. To do.

  In the present invention according to claim 7, the main girder is an opening groove of the steel shell element in a portion where the underground penetrating body interferes with the main girder provided along the circumferential direction on the inner surface of the steel shell element. When it is divided at the part and made continuous by the connecting plate, and the press-in of the underground penetrating body, the connecting plate is removed and the underground penetrating body is pressed into the ground, the main girder of the underground penetrating body An opening is formed in advance or by post-installation with respect to the penetrating part, and the main girder is made continuous by disposing and connecting the attachment plate straddling the main girder. A method of constructing the described underground penetrator is provided.

  In the present invention according to claim 7, in order to cope with the problem of interference between the underground penetrating body and the main girder provided along the circumferential direction on the inner surface of the steel shell element, the main girder is provided with the steel shell element. The main girder is made continuous with an attachment plate, and the press-in of the underground penetrating body is removed to avoid interference with the underground penetrating body. If the underground penetrating body is press-fitted into the ground, an opening is formed in advance or in a post-installation with respect to the main girder penetrating part of the underground penetrating body, and a connecting plate straddling between the main girders is arranged and connected. By doing so, the main girder is made continuous. Therefore, even if the main girder interferes, there is no hindrance to the press-fitting work of the underground penetrating body, and the steel shell element is destabilized by the structurally continuous replenishment main girder even after the press-fitting. And no increase in steel weight.

  As this invention which concerns on Claim 8, while forming the opening groove | channel along the cross-sectional shape of the said underground penetrating body previously with respect to the press injection site | part of an underground penetrating body, A first water-stopping member that is easy to break to ensure water-stopping in a state before press-fitting of the penetrating body, and a second water-stopping member that secures water-stopping in a state after press-fitting the underground penetrating body. There is provided a steel shell element for constructing an underground penetrating body characterized in that a water device is provided.

  As described in detail above, according to the present invention, when constructing underground penetrations such as steel materials for earth retaining from a horizontal shaft (steel shell element) built in the ground, In addition to eliminating the need for agent injection work, construction labor such as preparation work and refilling work associated with the press-fitting work of the underground penetrating body is greatly saved.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a cross-sectional view showing a mountain retaining state for constructing an underground structure using the underground penetrating method according to the present invention.

  The underground structure 5 shown in FIG. 1 is a structure constructed in the ground for, for example, a crossing underpass, a subway, a cave, a common ditch, an underground road, an underground shopping area, an underground parking lot, etc. As shown in the figure, the underground penetrating method is buried underground in the upper ground of the underground structure 5 such as a power cable E, a communication line T, a gas pipe G, a water pipe W, and a sewer pipe D. Since there is an object 10, if it is not possible to construct a retaining wall from the ground surface unless these underground objects 10 are relocated, It is suitably used when a box culvert (underground structure 5) is constructed without excavation in consideration of securing a cut-off road, secondary traffic congestion due to traffic restrictions, influence on the neighborhood, and the like.

  Specifically, while constructing the horizontal shafts 1A to 1C having a vertically long rectangular cross section using a shield excavator or a propulsion device on the lower ground of the underground buried object 10, a plurality of drawings are provided between the horizontal shafts 1A to 1C. In the example shown, three horizontal wells 2A to 2F having a horizontally long rectangular cross-section are constructed. Next, the steel retaining steel materials 3, 3... With joints are press-fitted from the lower surfaces of the horizontal shafts 1 A, 1 C located on both sides toward the lower ground, and the continuous steel shell element 1 A and the steel retaining steel materials 3, 3. The retaining steel walls 6 and 6 are formed, and the steel pillars 4 that serve as support piles are press-fitted at a predetermined interval in the longitudinal direction from the lower surface of the central horizontal shaft 1B toward the lower ground, and further, the horizontal horizontal shafts 2A to 2F In the space surrounded by the retaining walls 6, 6 and the upper structure 7 after the upper structure 7 supporting the upper earth and sand is constructed by connecting to the horizontal shafts 1 </ b> A to 1 </ b> C. In addition, the steel shell elements 11 and 12 forming the horizontal shafts 1A to 1C and 2A to 2F are disassembled to construct an underground structure including the culvert box 5 in the space.

  When a shield machine is used for excavation of the horizontal shafts 1A to 1C and 2A to 2F, for example, as shown in FIGS. 17 and 18, a pair of drum cutters 41 and 41 having a smaller diameter than the pair of drum cutters 41 and 41 is used. The digging unit 43 having a substantially square cross section provided with the ring cutter 42 may be used singly or a plurality of digging units 43 connected in the vertical direction. The shield excavator can have a circular cross section, but it is desirable to use a rectangular cross section from the viewpoint of reducing the amount of excavated soil. Further, when the linear shape is a curve, one having a middle folding mechanism and capable of curve excavation is used.

  On the other hand, as shown in detail in FIG. 2, the steel shell element 11 has a main girder that is continuous in the circumferential direction at a predetermined interval in the longitudinal direction of the member (the direction of excavation) on the inner surface side of the skin plate 13 forming the outer shell. 14 are provided, and second reinforcing beams 15, 15... Having a L-shaped cross section are provided along the longitudinal direction of the member at predetermined intervals in the circumferential direction. The steel shell elements 11 and 12 are continuously provided in the ground by being sequentially installed in the excavated portion as the ground is excavated by the shield machine.

  In the present invention, in order to press-fit the retaining steel material 3 (or support steel material 4) from the steel shell element 11 toward the lower ground, the press-fitting site of the retaining steel material 3 (or support steel material 4) in the steel shell element 11 in advance. On the other hand, while forming the opening groove 20 of the cross-sectional shape of the earth retaining steel material 3 (or the support steel material 4), a water stop device 21 provided with a water stop member 23 for closing the opening groove 20 is provided, The earth retaining steel material 3 (or column steel material 4) is press-fitted toward the ground while breaking the water-stopping member 23 from the inside of the steel shell element 11.

  Hereinafter, the press-fitting method will be described in detail with reference to FIGS.

  First, as shown in FIG. 3, an opening groove 20 having a cross-sectional shape of the retaining steel material 3 is formed in the skin plate 13 for the press-fitted portion of the retaining steel material 3 of the steel shell element 11. The water stop device 21 including the water stop member 23 that closes the opening groove 20 is provided. As shown in FIG. 3 (B), the water stop device 21 is provided with a water stop base plate 22 similarly formed with an opening groove 22a so as not to block the opening groove 20 formed in the skin plate 13. In addition, an easily breakable first water stop member 23 is disposed on the upper surface side in order to ensure water stoppage before the earth retaining steel material 3 is press-fitted, and the earth retaining steel material 3 is disposed on the upper surface side. In order to ensure water-stopping in the state after press-fitting, a device in which a presser plate 25 is fixed by bolts 26, 26, ... after laminating the second water-stopping member 24 in which the insertion groove 24a of the retaining steel material 3 is formed. It is. In this example, as the earth retaining steel material 3, as shown in FIG. 4, a steel material (trade name: K Domer-S type) having a deformed H shape with different flange widths is used. Any retaining steel material may be used as long as it has a high rigidity. Moreover, the said opening groove | channel 20 is formed according to the cross-sectional shape of the earth retaining steel material to be used.

  As the first water stop member 23, for example, a thin rubber sheet having a thickness of about 3 to 7 mm can be suitably used. As the second water stop member 24, a packing rubber having a thickness of about 10 to 20 mm is used. What made the groove width narrower than the wall thickness of the earth retaining steel material 3 can be used suitably. The material may be a rubber material, a resin, or a foamed resin. Moreover, in order to control a fracture | rupture part, the shallow cut which does not reach a back surface can also be formed in the thin rubber sheet of the said 1st water stop member 23. FIG.

  As shown in FIG. 5A, the press-in of the retaining steel material 3 is performed by using a small press-fitting pile driver (not shown) and inserting the second water-stopping member 24 at the tip of the retaining steel material 3. If it positions in the groove | channel 24a, it will push in toward the ground side in the state, will break the 1st water stop member 23, and will press-fit in the ground. In the state after the press-fitting, as shown in FIG. 5 (B), the groove wall of the insertion groove 24a of the second water stop member 24 is in close contact with the side surface of the earth retaining steel material 3 so as to ensure water stop. become.

  In order to construct a continuous earth retaining wall 6 by the earth retaining steel materials 3 and 3, the joints 3a and 3b of the adjacent earth retaining steel materials 3 and 3 are coupled to each other as shown in FIG. Since it is necessary to be in a state, the press-fitting of the retaining steel material 3 is performed while joining the joints 3a and 3b in order from one side, but in the state immediately after being press-fitted into the ground, the unjoined side joint 3a is broken. There may be a gap between the first water stop member 23 and the steel retaining steel material 3 and leakage of groundwater may occur.

  Therefore, in this method, as a first method, the water stop material 45 is filled in the joints 3a and 3b of the earth retaining steel material 3 in advance. Prior to press fitting, the joints 3a and 3b are preliminarily filled with a water stop material 45 that is not so resistant to press fitting (see FIG. 11 (B)), thereby joining the joint 3a of the preceding earth retaining steel material 3 at the time of press fitting. In the joint 3b on the side, the water-stopping material is left in the joint to ensure water-stopping of the joint portion 3b, and the joint 3a on the non-joining side avoids water leakage from the joint 3a due to the presence of the water-stopping material 45. be able to.

  Moreover, as a 2nd method, as FIG. 6 shows, the joint part packing apparatus 8 is installed with respect to the unjoined side joint part 3a of the earth retaining steel material just after press-fitting, and the water stop materials 23 and 24 are connected. Try to seal the gap.

  The joint packing device 8 is a device comprising a joint packing material 30 having a joint cross-sectional shape and a fixture 31 for supporting the joint packing material 30 as shown in FIG. Bolts are fixed to the presser plate 25 of the device 21. Note that the shape of the joint packing material 30 differs depending on whether or not the water-stopping material 45 is filled in the preceding joint 3a, and the case where the water-stopping material 45 is not filled is shown in FIG. When the joint packing shape is used and the water stop material 45 is filled, the joint packing shape shown in FIG. 11B is used.

  In order to press-fit the next retaining steel 3 ′ from the state shown in FIG. 6, first, as shown in FIG. 7 (A), the fixing tool 31 is removed and the joint insertion site on the other side is removed. As shown in FIG. 7B, when the joint packing material 30 is disposed, the removed fixing bracket 31 is attached, and the joint packing device 8 is installed, as shown in FIG. The one side joint 3b is fitted to the joint 3a of the installed steel retaining steel material 3, and the other side joint 3a is fitted to the joint packing material 30 of the joint packing device 8, as shown in FIG. The earth retaining steel material 3 is pressed into the ground while the joint packing material 30 is pushed into the ground by the one side joint 3b. FIG. 10 shows the state after the press-fitting. The state is the same as the state shown in FIG. 6, and the water stop immediately after the press-fitting is ensured also by the joint packing device 8. In addition, the water-stopping of the joint portions 3a and 3b that have been fitted can be achieved by applying a water-stopping material 45 left in the joints 3a and 3b or an inflatable sealant in the joints 3a and 3b in advance. Secured.

  By the way, the steel shell element 11 is provided with main girders 14, 14... Continuous in the circumferential direction at a predetermined interval in the longitudinal direction of the element, and the main girders 14, 14. The problem of interfering with 3 arises. Therefore, in order to smoothly perform the press-fitting work of the retaining steel material 3 while avoiding this interference, the main beam 14 is divided at the opening groove 20 as shown in FIG. , 32, and when the retaining steel material 3 is press-fitted, the retaining plates 32, 32 are removed and the retaining steel material 3 is press-fitted, as shown in FIG. 13 and FIG. An opening 3b is formed in advance or by post-installation on the main girder penetration portion of the steel material 3, and the attachment plates 32 and 32 straddling the divided main girders 14 and 14 are disposed again, and fasteners ( Bolts and nuts) 33, 33... Are connected so that the main beam 14 is structurally continuous.

  On the other hand, in order to connect the horizontally long horizontal shafts 2A to 2F to each other and construct the upper structure 7, it is fastened to the side surfaces of the steel shell elements 2A to 2F as in the method described in Patent Document 2 shown in FIG. Slide steel 34, 34 is provided, and this slide steel plate 34 is inserted into the ground of adjacent steel shell elements 2A to 2F from the inside of steel shell elements 2A to 2F using a hydraulic jack (not shown). In addition to performing a mountain stop, if the water level is below the groundwater level, a water stop material 35 is injected to ensure water stoppage. Then, the steel shell elements 2A to 2F are connected to each other by a connecting member such as a PC steel bar or an H-shaped steel to be structurally integrated.

  Next, as shown in FIG. 16, the retaining steel material 6 and the support steel material 4 are driven toward the lower ground from the steel shell elements 1 </ b> A to 1 </ b> C according to the structure scale, and the upper structure 7 and the side ground are supported. Then, the underground ground surrounded by the retaining walls 6 and 6 and the upper structure 7 is erected at every excavation stage up to the height 40 with the excavation floor, which is the final excavation depth, 38, the beam 39, and the beam receiver. Excavation is carried out while laying a retaining ring support such as girder 37.

  After the excavation, as shown in FIG. 1, foundation concrete is placed, and the earth retaining support such as a cut beam is appropriately dismantled, and a part of the steel shell elements 11 and 12 are dismantled and the underground structure 5 is disassembled. Do the construction.

[Other examples]
(1) In the above embodiment, the method for press-fitting the retaining steel material 3 has been described in detail. However, it is not necessary for the column steel material 4 to be press-fitted into the ground from the lower surface of the horizontal shaft 1B. What is necessary is just to press-fit into the ground in a single state at every interval.
(2) In the above embodiment, the lining concrete is not placed inside the steel shell elements 1A to 1C and 2A to 2F. However, if the strength is necessary, the lining concrete should be placed. Also good.
(3) In the above embodiment, as the upper structure 7, the horizontal shafts 2A to 2F are constructed in the ground, and the horizontal shafts 2A to 2F are connected to each other, and the both end side horizontal shafts 1A and 1C and the intermediate portion horizontal The mountain retaining structure having a gate-shaped cross section is constructed in connection with the pit 1B. However, when the upper structure 7 is constructed, the horizontal pits 2A to 2F in the intermediate portion are not provided, as shown in FIG. As described above, it is possible to replace the upper structure 7 by horizontally placing the earth retaining steel material 9.9... Between the steel shell elements 1A and 1B and between the steel shell elements 1B and 1C. In this case, since the construction accuracy of the earth retaining steel material 9 is required, the first earth retaining steel material 9 forms a horizontal hole extending between the horizontal shafts 1A, 1B (1B, 1C) by horizontal boring, and then the horizontal boring hole. A pulling wire is handed over, and the earth retaining steel material 9 is pulled accurately by the pulling wire and installed. At this time, a pulling wire is disposed inside the joint of the earth retaining steel material 9, and the superstructure by the earth retaining steel materials 9, 9... Is repeated by repeating the procedure of press-fitting while pulling the next earth retaining steel material 9 with the towing wire. It is desirable to build the body 7.
(4) In the above embodiment, the earth retaining steel material 3 and the column steel material 4 are press-fitted vertically from the lower surface side of the steel shell elements 1A to 1C toward the lower ground, but as shown in FIG. The side shafts 1A to 1F are constructed in a two-stage configuration on both sides and the middle part, and the earth retaining steel materials 9 and 9 are bridged horizontally between the steel shell elements 1A, 1B and 1C located on the upper stage side, and the lower stage Steel retaining elements 9 ', 9' are horizontally bridged between the steel shell elements 1D, 1E, 1F located on the lower side, and further on the lower side from the upper side steel shell elements 1A, 1B, 1C, respectively. It is also possible to surround the surroundings with the retaining steel materials 9 ..., 9 '..., 6 ... by bridging the retaining steel materials 6, 6 ... in the vertical direction toward the steel shell elements 1D, 1E, 1F.

It is a cross-sectional view which shows the mountain retaining state for constructing | assembling the underground structure using the construction method of the underground penetration body which concerns on this invention. The steel shell element 1A (1B, 1C) is shown, (A) is a cross-sectional view, and (B) is a BB arrow view. The water stop apparatus 21 is shown, (A) is a principal part top view, (B) is a BB line arrow directional view. It is a cross-sectional view of the earth retaining steel material 3. It is a press-fitting procedure diagram of the earth retaining steel material 3 in 21 parts of the water stop device. It is the press-fitting procedure figure (No. 1) of the earth retaining steel material. It is the press-fitting procedure figure (the 2) of the earth retaining steel material 3. FIG. It is the press-fitting procedure figure (the 3) of the earth retaining steel material 3. FIG. It is the press-fitting procedure figure (the 4) of the earth retaining steel material 3. FIG. It is the press-fitting procedure figure (the 5) of the earth retaining steel material 3. FIG. It is a figure which shows the aspect of the joint packing. FIG. 3 is a construction procedure diagram (part 1) at an interference site with a main beam. FIG. 11 is a construction procedure diagram (part 2) at the site of interference with the main beam 14; FIG. 4 is a perspective view of a main part of an interference part with a main girder 14. It is a cross-sectional view which shows the connection point of the horizontal wells 2A-2F. It is a cross-sectional view which shows the excavation point by support installation. It is a longitudinal cross-sectional view of a shield machine. It is a cutter head front view of a shield machine. It is a cross-sectional view which shows the other formation method (the 1) of a mountain retaining structure. It is a cross-sectional view which shows the other formation method (the 2) of a mountain retaining structure. It is a figure (the 1) which shows the conventional water stopping body formation point. It is a figure (the 2) which shows the conventional water stopping body formation point.

Explanation of symbols

  1A to 1C, 2A to 2F ... Horizontal shaft, 3 ... Earth retaining steel material, 4 ... Steel pillar material, 5 ... Box culvert (underground structure), 6 ... Earth retaining wall, 7 ... Upper structure, 8 ... Joint packing device , 9 ... Earth retaining steel material, 10 ... Underground material, 11.12 ... Steel shell element, 13 ... Skin plate, 14 ... Main girder, 15 ... Reinforcement girder, 20 ... Opening groove, 21 ... Water stop device, 23 ... No. DESCRIPTION OF SYMBOLS 1 Water stop member, 24 ... 2nd water stop member, 30 ... Joint packing material, 31 ... Fixing tool, 32 ... Connecting plate, 33 ... Fastener

Claims (8)

A construction method for press-fitting an underground intruder from the inside of a steel shell element built in the ground toward the ground,
A water-stop device provided with a water-stopping member that previously forms an opening groove along a cross-sectional shape of the underground penetrating body with respect to a press-fitting site of the underground penetrating body in the steel shell element and closes the opening groove. A construction method for an underground penetrating body, wherein the underground penetrating body is press-fitted toward the ground while breaking the water-stopping member from the inside of the steel shell element. A construction method for press-fitting earth retaining steel with a joint that forms an underground penetrating body from the inside of a steel shell element built in the ground,
A water stop device provided with a water stop member that preliminarily forms an opening groove along the cross-sectional shape of the retaining steel material and press-fitting the retaining steel material in the steel shell element is provided. In addition, from the inside of the steel shell element, the joint of the retaining steel material to be press-fit is coupled to the joint of the installed retaining steel material, and the retaining steel material is pressed into the ground while breaking the water-stopping member. An underground intrusion construction method characterized by this.   The construction method of the underground penetrating body according to claim 2, wherein the earth retaining steel material previously filled with a water-stopping material is press-fitted into the joint.   In the construction method of the underground penetrating body according to claim 2, a joint portion packing material having a joint cross-sectional shape is installed on the unbonded side joint portion of the retaining steel immediately after press-fitting, and a gap between the waterproof member Then, when press-fitting adjacent earth retaining steel into the ground, the earth retaining steel joint is joined to the installed earth retaining steel joint, and the earth retaining steel is removed while pushing the joint packing into the ground. An underground intrusion construction method characterized by being pressed into the ground.   The water stop device includes a first breakable water-stopping member that ensures water-stopping in a state before press-fitting the underground penetrating body, and a first water-stopping member that secures water-stopping in a state after press-fitting the underground penetrating body. The construction method of the underground penetration body in any one of Claims 1-4 which consists of 2 water stop members.   6. The underground penetrating body according to claim 5, wherein the first water stopping member is a thin rubber sheet, and the second water stopping member is a rubber packing in which an opening groove is formed along a cross-sectional shape of the underground penetrating body. Construction method.   In the portion where the underground penetration body and the main girder provided along the circumferential direction on the inner surface of the steel shell element interfere with each other, the main girder is divided at the opening groove portion of the steel shell element, and the attachment plate In the press-fitting of the underground penetrating body, if the joint plate is removed and the underground penetrating body is press-fitted into the ground, the main penetrating part of the underground penetrating body is inserted in advance or later. The construction method of the underground penetrating body according to any one of claims 1 to 6, wherein an opening is formed by construction, and the main girder is made continuous by disposing and connecting the attachment plate straddling the main girder. . An opening groove is formed in advance along the cross-sectional shape of the underground penetrating body with respect to the press-fitting site of the underground penetrating body, and is stopped in a state before the underground penetrating body is pressed so as to close the opening groove. A water-stop device comprising a first breakable water-stopping member that secures water and a second water-stopping member that secures water-stopping in a state after press-fitting of the underground penetrating body is provided. Steel shell element for constructing underground intrusions.

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