JP2009516109A - Temporary earth retaining device - Google Patents

Abstract

During the excavation work to construct a set of intermediate brace beams in triangular support structure underground structure supporting temporary earth retaining device, it supports the earth pressure well as it is possible.
Therefore, it is possible to prevent from reduced space by reduced / reduced by complicated support structure, reduced / reduced usage materials through reduced construction costs, and increased work space productivity Let
The cornering structure that simplifies / simplifies the temporary earthing device, and the earth pressure transmitted from the earth pressure transmitted to withstand the ability to rein force the brace beam and the belly. Thereby, it is possible to reduce / shrink from preventing space Reduced by complicated support structure, reduced usage / reduced materials through reduced construction costs, and increased work space and thus improved / improved productivity.
[Selection] Figure 1

Description

  The present invention relates generally to temporary earth retaining devices, and in particular, may increase the ability to withstand earth pressure through simplification of the structure during a vertical hole drilling operation to construct an underground structure. The present invention relates to a temporary earth retaining device.

  As is known in the art, in a subway structure or vertical hole drilling operation, a hole is dug with a predetermined depth and a specified area to form a basement of a building, and then a vertical pile is driven into the hole. After the vertical pile is driven, the ground is partially excavated, and then the H beam and lining board are installed. After installation of the lining plate, the remaining ground is excavated, brace beams are repeatedly installed, and then excavation is performed. Therefore, in order to design this temporary structure, the earth pressure and load acting on each brace beam must be repeatedly calculated for each excavation process, and the brace beam is determined as the maximum soil thus determined. Installed to withstand pressure and load.

This design and structure requires many brace beams. In most cases, the brace beams are densely arranged at intervals of 2 m to 3 m. The dense brace beam is a major obstacle that hinders the transportation and transportation of construction materials, the introduction and operation of heavy equipment in the excavation vertical hole, and when the main structure is continuously formed, And considerably hinder reinforcement work.
In addition, the dense brace beam in the main structure inevitably requires the formation of a plurality of holes, which causes a serious problem in waterproofing the completed underground structure.

  The vertical pile is in accordance with various methods such as a method using a steel H beam, a method using a concrete pile into which a hole is drilled and concrete is poured, a method using a concrete pile with an H beam, and a method using a sheet pile. Is set. These methods do not differ in the basic principles of digging into the ground, forming on pile walls, and supporting ground loads.

  There are also other methods. They are a method of using a preflex beam as the vertical pile and a method of attaching a sheet pile to the H beam in order to increase rigidity.

  Among the methods for temporarily constructing the underground structure, there is a method of supporting a steel pile using an earth anchor that does not require the brace beam.

  This method includes oblique drilling work to the ground behind the pile, insertion of steel wire or steel bar into the hole, mechanical method or insertion steel wire using chemical method such as epoxy grout or cement grout or The anchoring of the end of the steel bar and the application of tension to the anchored steel wire or steel bar to fix the steel pile with tension ioning are required.

  This temporary method has an advantage in that the construction structure secures a sufficient internal space, thereby reducing the problem of difficulty in performing work.

  However, this temporary method has been widely criticized by the public because the private property surrounding it is infringed in most cases when it is implemented in a developed city, and its cost is considerably high.

  Patent Document 1 discloses a method of removing a brace beam arranged across a drilling vertical hole from a temporary structure using a truss. This method is expected to be applicable when the ground is excavated relatively shallowly, the H-beam is double formed near the ground surface in a lattice shape, and is reinforced by vertical beams and diagonal beams. As a result, the two-layer truss close to the ground surface can withstand the earth pressure.

  This method is devised to overcome the problems in excavation and installation of the main structure due to the brace beam of the temporary structure, and a wide structure is formed in the lower part of the excavation ground, and a narrow structure Is regarded as a convenient method in the situation where it is formed in the upper part of the excavated ground.

  Usually, the brace beam is mainly used in vertical hole drilling operations. When viewed from the top during such work, the moment due to the earth pressure is greatest at the central portion of the rectangular region, so the central portion must have a greater bearing strength than the other portions.

Thus, the central portion requires a number of central brace beams. This increases the construction cost and complicates the structure. Thereby, the working space is narrowed, thus reducing productivity.
Korean Utility Model Registration No. 20-258949

  Accordingly, the present invention has been made to solve the above-mentioned problems in the prior art, and the object of the present invention is to provide a pair of intermediate brace beams having a preceding loading jack at the center and both ends thereof. A temporary support soil, in which triangular support structures are attached to the intermediate excavation part during the vertical hole excavation work to construct each underground structure, thereby increasing the ability to withstand earth pressure through simplification of the structure It is to provide a fastening device.

  Another object of the present invention is that a corner connection structure is applied to each corner of the excavation part during vertical hole excavation work to construct an underground structure, thereby reducing earth pressure through structural simplification. It is to provide a temporary earthing device that increases the ability to withstand.

  Another object of the present invention is that the brace beams are interconnected at each corner of the excavation part during a vertical hole drilling operation to construct an underground structure, so that the brace beam functions like a single member. Thus, it is to provide a temporary earthing device for forming a brace beam to which earth pressure is transmitted in a truss structure.

  In order to achieve the above object, according to one aspect of the present invention, a temporary earthing device including the following is provided. A pair of intermediate brace beams are attached over the entire intermediate portion excavated in the rectangular area during excavation of the underground vertical hole, and the flank is integrally connected to both ends of the intermediate brace beam set. That. Here, the intermediate brace beam set is provided with a preceding loading jack in the middle thereof, and both ends thereof are formed on the left and right sides of the respective end portions via the first and second connectors so as to form a triangular support structure. Connected with diagonal beams.

  According to another aspect of the present invention, a bracing wall that is attached in parallel with a drilling portion during underground vertical hole excavation work, and the braided wall at each corner in the vertical hole excavation work. A pair of brace beams connected to support earth pressure, a corner connector having a horizontal beam connected to each belly, and an oblique connection to one end of the horizontal beam and integrally connected to one end of the brace beam set There is provided a temporary earthing device including a compressed beam and an oblique cut beam connected to one end of the compressed beam and the other end of the transverse beam.

  According to another aspect of the present invention, a temporary earthing device is provided. Arbitrary upper and lower surfaces of brace beams arranged in a row at predetermined intervals so as to support each corner during excavation work in the underground vertical hole, and integrally connected to at least one connecting plate One of the above-mentioned brace beams which are inter-coupled by coupling means.

According to the first embodiment of the present invention, the temporary earthing device is adapted to be easily adapted to the connecting structure, the intermediate brace beam set and the rein force, the earth pressure transmitted from the earth pressure transmitted. For constructing a rectangular vertical hole excavation work underground structure between the entrance wall and the wake.
Therefore, the intermediate brace beam set that supports the triangular support structure having the temporary earth retaining device for constructing an underground structure in the vertical hole excavation work, so it supports the earth pressure well. Therefore, it is possible to prevent from reduced space by reduced / reduced by complicated support structure, reduced / reduced usage through various construction materials, and increased work space to therefore / thus Improved / improved productivity.

  Further, an ed in triangular support structure for supporting are set at both ends of the intermediate brace beam. Therefore, the brace wall to which the earth brace beam for connecting the existing / existing structure compared to the ing area supporting the wide r which was actually transmitted or supported by possible So it is possible that the earth pressure and increased bearing strength corresponding to the amount of compressive force applied / applied simultaneously.

According to a second embodiment of the present invention, the temporary earthing device can easily be adapted to the connecting structure in each corner and rein force, and the earth pressure transmitted to withstand the ability to rein force the bracing wall and During vertical hole drilling work to construct the abdomen underground structure.
Therefore, the temporary earth retaining device can support the earth pressure transmitted to each corner well supporting the corner hole structure for constructing an underground structure which is simple / manual operation and easy to operate. Because it is possible to prevent space from being reduced / reduced by complicated support structure, reduced / reduced usage costs through reduced construction costs, various materials, and increased work space for that / Thus improved / improved productivity.

  According to a third embodiment of the present invention, the temporary earth retaining device is configured as follows during a vertical hole excavation operation for constructing an underground structure at each row corner arranged in the brace beam to be connected to each other. To. The temporary earth retaining device integrated / integrated in the truss structure at each corner of the brace beam in the row, so it is possible to uniformly transmit / transmit horizontal loads, and thus bend loads against sufficient durability thus obtained.

  Reference / reference will now be made in more detail to exemplary / exemplary embodiments of the invention with reference to the accompanying drawings.

[Embodiment 1]
1 to 4, according to the temporary earth retaining device / according to the first embodiment of the present invention, the abdomen 20are integrally conjugated / connected with a bracing wall (not shown) ), A set of intermediate brace beams 100 traverse long / long side braided walls that support the earth pressure during drilling work in the vertical hole in the rectangular region of the excavation vertically parallel to installation / installation, and Since the earth pressure is transmitted to support the bracing wall, the oblique bracing beam 200, the intermediate brace beam set 100 that supports the diagonally cut beam 200, and the corresponding bellows 20 are connected to the opposite ends of the intermediate brace beam. Set 100 and the corresponding upset 20in triangular structure.

  More specifically, a plurality of the intermediate brace beam sets 100 including the intermediate brace beam structure, and each intermediate brace beam having a structure are conjugated / coupled integrally with each other so as to be connected to both ends thereof. And is provided with a pre-loading jack 150 in the middle, thereby having a varying ability to withstand the earth pressure.

  Depending on the single-layer / layer flank or multi-layer / layer flank that can utilize each flank 20, the footprint of the excavated ground and preferably preferably adapted to pre-stressed Let (the moment of) the earth pressure.

Each beveled beam 200 has a triangular structure from which the intermediate brace beam 100 and the corresponding flank 20, t here are formed in relation to / with respect to the obliquely attached. The intermediate brace beam set 100 and the corresponding erection 20 that are integrally connected to the oblique beam 200, 310 and 320 through first and second connectors, respectively, at both ends thereof. The diagonal cut beams 200 at the both ends are supported in the shape of an approximately triangle having the first and second connectors 310 and 320.

  The first connector 310 includes the intermediate brace beam set 100 and the oblique cut beam 200, and the vertical brace 312 including the intermediate brace beam set 100 and the first brace beam set 100 connected to the first connector 310 and the first brace beam set 100. And a second supporting ing beam 314 and 316are having a triangular shape with the vertical beam 312 on one side of both ends of which are connected obliquely.

Further, the second connector 320 is inserted in parallel with the oblique beam 200 and the corresponding bellows 20, and the transverse beam 322, which is included in the surface contact / contact and the belly. The raised beam 20 and the first and second connecting beams 324 and 326are are obliquely connected at both ends of the transverse beam 322 and integrally coupled with the other end of the oblique beam 200 at the other end. Triangular shape.

  Since the second connector 320 of the transverse beam 322 is transmitted by the load that supports the edging 20 on one side of the bolt ed on, and the first and second connecting beams 324 and 326, which act to act as the joints e. Cut beam 200.

Preferably, the web and flange having standard / typical H-beams to be used / adopted for each of the first and second connectors 310 and 320 of the beam. At least one first stiffener 310a is welded
The H-beam f of the web or the first connector 310 and at least one second stiffener 320a are welded to the H-beam f of the web or the second connector 320.

  Each of the first and second stiffeners 310a and 320a is preferably provided with a compressive force that supports the separate members coupled / coupled or force transmitted.

  Further, the end plate welded with the transverse beam 322 and the vertical beam 312 ed, the corresponding flank 20 and the intermediate brace beam set 100 connected to be to their ends, respectively.

Also, first and second reinf or cing plates 310b having the first and second connectors 310 and 320 are provided.
And 320b, the vertical beam 312 and the ing beam 314 supporting the first, and the transverse beam 322 and the first connecting beam 324 between the first beam 312 and the first beam 324, respectively. Thus, the first and second connectors 310 and 320are in surface contact / contact and 2x side surfaces of the first and second reinf or cing plates 310b, respectively.
And 320b, so they can increase the above mentioned ability to withstand the compressive force.

  The abdomen 20 is preferably a shear key point provided with / important 322a at the position where the compressive force is transmitted. The shear keypoint / significant 322a is connected by high tensile bolts, and is in contact with the single flange of the transverse beam 322.

  Therefore, the compression force transmitted to the belly 20 and the force transmitted from the oblique cut beam 200 act in the opposite / reverse direction / indication, the shear key point / important 322a function. Use the opposing / opposite force to offset each other.

  According to this structure with said operation said temporary earthing device, according to / under the first embodiment of the present invention.

  According to the temporary earthing device / according to the first embodiment of the present invention, the intermediate part which supports the earth pressure is transmitted via the bracing wall by the installation of the oblique wall A triangular support structure having a beam 200f or connection / connection and the flank 20 as at both ends of the intermediate brace beam 100.

  Currently, the intermediate loading brace 150 installation / installation at the intermediate part, preferably at the center, the intermediate brace beam set 100 transmission / transmission load in the opposite / reverse direction / indication. Thereby, 100 applied / applied pressure to the opposite ends of the intermediate brace beam to the opposite / reverse upset 20 and thus / to the earth pressure to the opposite side corresponding to the transmission / transmission compression bearing force / Reverse upset 20

  Further, since the compressive force is transmitted, the opposite / reverse flank 20 is dispensed and supports ed to install the diagonally cut beam 200 / installation on both ends of the intermediate brace beam 100to shape Because of the triangular shape, stable bearing strength was possible.

Each angling 20 via the pressure transmitted is transmitted to each lateral beam 322 of the end plate, which is in-surface contact / contact and a corresponding urging 20 of the stopper. In this case, each cross beam 322 comes into contact with the shear key point / important 322a, because each of the compression forces is transmitted to each abdomen 20 to oppose the pressure transmitted to the cross beam 322 through the intermediate brace Beam set 100. As a result, these forces can be offset and counteracted / cancelled ed by each other, and at the same time the bearing strength can be provided by high tensile bolts.

Further, the intermediate brace beam set 100 connected to the oblique beam 200are and the opposite / reverse upset 20to.
Shaped triangular support structure, so the opposite / reverse flank is possible from the compressive force dispensed and supports ed in more stable way.

  In addition, the first and second stiffeners 310a and 320a are welded to the webs of the H-beams using the first and second connectors, respectively, so they can increase the rigidity and the ability to withstand the compressive force. Further, the first and second connectors 310 and 320are are provided with the first and second reinf or cing plates 310b and 320b, respectively, so they can create up f or the ability to withstand the compression. Since the force was transmitted, the oblique beam 200.

[Embodiment 2]
According to / according to the temporary earthing device according to the second embodiment of the present invention, the triangular support structure using the corner connecting structure further including / in accordance with / according to the temporary earthing device according to the second embodiment One embodiment of the present invention. In this case, the temporary earthing device can increase the efficiency of usage space and the ability to withstand the earth pressure mentioned above through structural simplification.

  According to the temporary earth retaining device / according to the second embodiment of the present invention, the triangular support structure described above using a corner connection structure further including the present invention. Referring to / refer to 8 through FIG. 5, according to the temporary earthing device / according to the second embodiment of the present invention, the brazed wall 510 is included in parallel when attached. In the vertical excavation part vertical hole drilling operation, the flank 520 and the brace beam set 550are are conjugated / connected integrally to support the braided wall 510 and the earth pressure, and the corner connector 600 is provided. The braided wall 510 and the braided wall 510 from which the earth pressure was transmitted to support the braided wall 510 formed in a corner.

More specifically, each brace beam set 550 is also possible.
Replace bystrut, and each erection 520 is capable of pre-stressed to adapt to the earth pressure of the moment. Further, in view of / in consideration of a single-layer / layer flank or multi-layer / layer flank that can utilize each flank 520 of the footprint and its depth of the excavated ground.

Each corner connector 600 includes a transverse beam 610, a compression beam 620, and a diagonal beam 630, all of which have a shape-stable structural pressure transmitted against it, ie a triangular structure.
Here, the corresponding beam 520 is integrally formed with the cross beam 610. The compression beam 620 is connected to the transverse beam 610 at one end and each brace beam set 550 at one end.
The transverse beam 610 and the compressed beam 620 connected to the oblique beam 630.

  The transverse beam 610 is fixed to the bolt by the corresponding bellow 520 on one side. The compressed beam 620 is connected to each brace beam set 550 on one side thereof, and transmission / transmission of the earth pressure of the load, which is transmitted from each brace beam set 550 to other members. The compressed beam 620 is transmitted from the load supporting the ditley e and the diagonal beam 630.

  Each of the transverse beam 610, the compression beam 620, and the oblique beam 630, preferably the known H-beam to be used / adopted, to the web, among which at least one stiffener 650 is welded.

  The tiffener 650 is preferably provided to a portion of the member are conjugated / coupled or compressive force that supports the force transmitted.

Further, the end plate 614 with the cross beam 610 welded to both ends (opposite) the corresponding flank 520 connected to be to do so.

Further, the transverse beam 610 and the compression beam 620 while the reinf or cing plate 810 is inserted.
The reinf or cing plate 810 has in-surface contact / contact and the lateral beam 610 and the compressed beam 620on 2x side surfaces, so it can increase the ability to withstand the compressive force.

The reference / reference numeral "602", which
In addition, it should be noted that the been listed / refers to / means drain holes to prevent / collect from rain water in each beam.

As in FIG. 4, each erection 520 is preferably a shear key point provided / important 615 at position where the compressive force is transmitted. The shear keypoint / important 615 is connected by the high tensile bolt, and is in contact with the transverse beam 610 on the other side.

  Therefore, the compression force transmitted to the belly 520 and the force transmitted from the compression beam 620 act in the opposite / reverse direction / indication, the shear key point / significant function 615 Use said opposing / opposite force to offset each other.

However, as illustrated, each intermediate brace beam set 550 is provided with / provided with a cylinder having a pre-loading jack.
Preferably, each brace beam set 550 includes a triangular structure having a corresponding corner connector 600 provided at both ends thereof, from the earth pressure corresponding to transmission / transmission compression force to the preceding loading jack to the The corresponding corner connector 600 of the compression beam 620.

  According to this structure having the above-mentioned operation said temporary earthing device, according to / under the second embodiment of the present invention.

  According to the temporary earthing device / according to the second embodiment of the present invention according to the present invention, the corner connector 600, through the braided wall 510, which is supported by the earth pressure configured as described above, The brace beam set 550 and the upset 520 at the corner defined / prescribed by the brace wall 510 between installation / installation.

  At present, the earth pressure on the bracing wall 510 is assisted by the compressive force transmitted from the brace beam set 550 and by the transverse / transverse pressure transmitted from the abdomen 520 at the corner. Each corner connector 600 of the compression beam 620 is es and the transmission / transmission pressure, which is transmitted from each brace beam set 550, to the transverse beam 610 and the oblique beam 630. As a result, the temporary earthing device can be used with a capacity to carry an increased load, which is simple / easy to operate.

Each erection 520 via the pressure transmitted is transmitted to each lateral beam 610 of the end plate, which is in-surface contact / contact and the corresponding erection 520. In this case, each cross beam 610 comes into contact with the shear key point / important 615, because the compression force is transmitted to each belly 520 and the pressure is transmitted to each brace 610 through each cross beam 610. Beam set 550. As a result, these forces can be offset and counteracted / cancelled by each other, and the bearing strength can be provided using high tensile bolts.

  In addition, the tiffener 650 is welded to the web using the H-beam using each corner connector 600, so it can increase the stiffness and compressive force to withstand the above-mentioned ability. Further, the reinf or cing plate is inserted between the transverse beam 610 and the compression beam 620, so it can increase the ability to withstand the ability of the brace beam set 550 from being transmitted.

[Embodiment 3]
According to the temporary earthing device / according to the third embodiment of the present invention, the corner connection structure which further includes a uniformly configured transmission / transmission horizontal load to and thus a sufficient ability to obtain thus In the brace beam, using an endurance bending load, each corner placed in a row and integrated / integrated in truss structure vertical drilling work is carried out for constructing underground structures.

  Referring to FIG. 9 through FIG. 9, according to the temporary earthing device / according to the third embodiment of the present invention, the brace beam 1100are includes diagonally arranged rows at each corner. Vertical borehole excavation work is carried out to construct an underground structure, and are carrying brace walls 1010 on both ends thereof, and at least one connecting plate 1200inter connecting the above or below neighboring bracing beams Coupling means using 1100.

  More specifically, the rectangular shape having the connecting plate 1200, and the at least one stiffener 1210 provided with a deformation in the resist vertical bending to be oriented in the longitudinal direction.

The tiffener 1210 is integrally formed and welded through the connecting plate 1200 having a single cutting edge / edge or integrated with the connecting plate 1200.
Angle of the shape or L-shape / shape with the tiffener 1210.
However, not illustrated, H-beams that can utilize the connecting plate 1200.

FIG. 13 is a front view illustrating FIG.
The upper and lower brace beams 110 connected to the connecting plate 1200, respectively. According to / according to the specific site / part of the situation, a plurality of connecting plates 1200 are preferably used in a stacked arrangement.
If necessary, the tiffener 1210 could be omitted.

  Parallel / parallel in truss structure arranged on the brace beam 1100to be in the row that causes / causes the connecting plate 1200, and to uniformly transmit / transmit to act on one side without load.

  Each brace beam 1100 is coupled to a belly 1020, which is integrally conjugated / coupled to the bracing wall 1010 at both ends thereof. Alternatively, each brace beam 1100 is connected to the flank 1020 at its opposite ends by a separate / separated structure.

  Illustratively, a bolt 1310 and a nut 1320 using an ing member that is welded or well-known by the connecting plate 1200 and the brace beam 1100 that serve as the coupling means. A large number of through-holes 1102 and 1202f or ing bolts 1310 to be fastened, respectively, are provided in the ing member to be fastened using each brace beam 1100 and the connecting plate 1200are. The through holes 1102 and 1202 passing through the bolt 1310 and then are fastened by the nut 1320.

Reference / reference numeral "1150", which
Note that it has been noted that the bearing beam b ears said brace beam 1100in horizontal axis / transverse direction / instruction. At least one bearing beam 1150 is integrally fastened to the bolt 1310 by each brace beam 1100 on the lower surface, thereby serving.
To prevent the brace beam 1100 from being bent upward or downward by the load.

  According to this structure with said operation said temporary earthing device, according to / under the third embodiment of the present invention.

According to the temporary earth retaining device / according to the third embodiment of the present invention, the plurality of rows of brace beams 1100, which are connected to each other, are arranged in parallel / parallel corners arranged in vertical holes. The excavation work is carried out for constructing an underground structure, using a rectangular shape with the connecting plate 1200, so that the brace beams 1100 are spaced apart from each other into a single structure, thereby In relation to / in the unified way with be loaded at each end thereof.
Therefore, the load is uniformly transmitted to each brace beam 1100, and the brace beam 1100 is prevented from being ting or flexing through de.

  At present, the connecting plate 1200are in surface contact / contact and the upper or lower brace beams 1100 and the through holes 1102 and 1202are aligned in the vertical direction / instruction. Next, the through holes 1102 and 1202 that pass through the bolt 1310, and are fastened by the nut 1320. Thereby, the temporary earthing device of the assembly is completed / completed.

  When the assembly is complete / complete, truss structure with the brace beam 1100 at each corner, defined / prescribed by the bracing wall. Accordingly, the brace beam 1100re acts to transmit load in an integration / integration scheme, and thereby has sufficient resistance to horizontal bending load.

Further, the tiffener 1210 protrudes outward / outward from each connecting plate 1200 with a single surface welded to each connecting plate 1200, so that the brace beam 1100 can flexure above the resist.
However, each brace beam 1100 of the load was transmitted.

  Note that when the underground structure is sufficiently stable to prevent col wrapping from the ground, the temporary earth retaining device is disassembled and re-used d. At present, the connecting plate 1200are separated from each brace beam 1100by un The bolt 1310 and the nut 1320 to be fastened.

The bracing beam 1100 in the row between the intervals according to the in size with which the connecting plate 1200 varies. Therefore, each connecting plate 1200 is not
Fixed size with the required to.

FIG. 1 is a temporary earth retaining device illustrating a schematic top plan view according to a first embodiment of the present invention. FIG. 2 is an important partial in-temporary earth retaining device illustrating the perspective view according to the first embodiment of the present invention. FIG. 3 is a first connector illustrating an upper plan view according to the first embodiment of the present invention, which is an important part in a temporary earth retaining device. FIG. 4 is an upper plan view illustrating a second connector to be connected according to the first embodiment of the present invention, which is an important part in a temporary earthing device. FIG. 5 is a temporary earthing device for explaining a schematic top plan view according to a second embodiment of the present invention. 6 is an enlarged perspective view illustrating a part of FIG. FIG. 7 is an important part of FIG. FIG. 8 is a partial top plan view illustrating the above-mentioned corner connecting structure 5 in a modified form. FIG. 9 is a temporary earthing device illustrating the upper plan view according to the third embodiment of the present invention. FIG. 10 is an enlarged perspective view illustrating part B of FIG. FIG. 11 is an important part of FIG. FIG. 12 is an important part of FIG. 9 illustrating the front view. FIG. 13 is a modification of FIG. 12 illustrating the front view.

Claims (14)

  Temporary earth retaining device, including: A pair of intermediate brace beams are drilled in the middle part of the entire area where they are installed, and in the rectangular area during the excavation of underground vertical holes, and integrally connected with the flank are In the intermediate brace beam set, both ends of the intermediate brace beam set are characterized in that the intermediate brace beam set is provided with a preceding loading jack provided in the middle thereof, and is connected to the oblique cutting beam. And the both ends form a triangular support structure on the left and right sides of each end via the second connector.   2. The temporary earth retaining device according to claim 1, wherein each of the first connectors includes the intermediate brace beam set on one side and the diagonally cut beams on one end while being inserted. The intermediate brace beam set connected to the vertical beam, that is, the first and second supporting beam are diagonally connected to the vertical beam on one side of the both ends of the triangular shape. In Claim 1 of the said temporary earthing | holding apparatus, Each 2nd connector characterized by the above-mentioned. Parallel to and in surface contact / contact with each upset, and the first and second connecting beams are diagonally connected to both ends of the side beam on the side of the triangular shape.   4. The temporary earthing device according to claim 3, wherein each second connector is provided with in-surface contact / contact point and shear key point / important, which is provided on each Upset. 4. The temporary earth retaining device of claim 3, wherein each of the first and second connectors is a web and flange having an H-beam, and at least one stiffener is welded to the web.
To increase the compressive force. Claim 1 of the temporary earthing device according to claim 1, further comprising a corner connecting structure: The braided wall is parallel to the excavated portion and during the underground vertical excavation operation, a set of brace beams Supporting the vertical hole excavation work and earth pressure between each corner of the braided wall at connected to the, and a corner connector:
A cross beam that is connected to one side of the horizontal beam; and a brace beam set that is integrally connected to one end of the horizontal beam; and one end of the compressed beam that is connected to one end of the horizontal beam; Connected to the end.   7. The temporary earth retaining device according to claim 6, wherein the oblique beam and the compression beam are connected to each other vertically.   7. The temporary connector according to claim 6, wherein the corner connector comprises a web and flange having an H-beam, and at least one stiffener conjugated / coupled to the web.   7. The temporary earth retaining device according to claim 6, wherein the reinf or cing plate having the transverse beam and the compression beam is conjugated / coupled together to provide reinforcement therebetween. In claim 6, wherein the temporary earth retaining device is characterized in that each erection becomes a shear key point including / contacted with an important at position and the transverse beam compressive force is transmitted. . Claim 1 of the said temporary earthing device, further comprising a corner connecting structure including: at a predetermined distance between each corner arranged in one row of brace beams during excavation work of an underground vertical hole;
And the brace beam inter-connecting as any one by coupling means on the upper and lower surfaces of each brace beam integrally connected to at least one connecting plate.   11. The temporary earth retaining device according to claim 11, further comprising at least one stiffener projecting outward / outward from the single surface of the connecting plate in longitudinal direction. In the eleventh aspect of the present invention, the coupling means includes the following.
A plurality of through holes provided to each brace beam and the connecting plate; a through hole through the bolt; and a nut screwed onto the bolt.   The quadrilateral outer / lateral shape having the connecting plate according to claim 11, wherein the temporary earth retaining device is a plurality of and in-layer arrangement.

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