CN214363501U - Inner supporting structure for reinforcing foundation pit support - Google Patents
Inner supporting structure for reinforcing foundation pit support Download PDFInfo
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- CN214363501U CN214363501U CN202022796125.3U CN202022796125U CN214363501U CN 214363501 U CN214363501 U CN 214363501U CN 202022796125 U CN202022796125 U CN 202022796125U CN 214363501 U CN214363501 U CN 214363501U
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Abstract
The invention provides an inner supporting structure for reinforcing foundation pit support, which comprises an enclosing purlin and a plurality of steel pipe supports, wherein the enclosing purlin is arranged around a foundation pit, two ends of each steel pipe support are respectively a fixed end and a movable end, and the fixed end and the movable end of each steel pipe support are respectively connected with the enclosing purlins on two opposite sides. The inner support structure only pours plain concrete into the end part of the steel pipe, thereby reducing the dead weight of the inner support structure and reducing the installation difficulty of the inner support structure. When the inner support structure is dismantled, the joint is easy to cut, and plain concrete in the steel pipe can be completely taken out without damaging the integrity of the steel pipe, thereby being beneficial to transportation, recovery and use of the steel pipe and reducing the production cost.
Description
Technical Field
The invention relates to the technical field of deep foundation pit engineering such as constructional engineering, rail traffic engineering, ports and wharfs, in particular to an inner support structure suitable for a deep foundation pit, and particularly relates to an inner support structure for reinforcing foundation pit support.
Background
In foundation pit engineering, steel pipes or concrete is often used as an inner support to form an enclosure structure to prevent deformation of a foundation pit, the problems of insufficient bearing capacity and overlarge deformation of the enclosure structure exist in a single steel pipe support, and the defects of construction period delay, cost rise, difficulty in later-period dismantling, incapability of recycling and the like exist in the process of using the concrete inner support.
Use modified steel pipe concrete as supporting, although improved bearing capacity, nevertheless because steel pipe concrete's dead weight grow, the degree of difficulty of transportation and installation increases, supports the amount of deflection grow, has improved the degree of difficulty and the requirement that the kneck is connected, and simultaneously, the final recovery of steel pipe concrete also has certain degree of difficulty.
The steel pipes or the steel pipe concrete used as the inner supports are connected together through welded flange plates by bolts, the connection position is the weak point of the inner support structure, the integrity of the enclosure structure can be improved by strengthening the connection of the inner supports, and the deformation of a foundation pit is reduced.
In view of the above, there is a need for an internal support structure for reinforcing an excavation support.
Disclosure of Invention
The invention aims to provide an inner supporting structure for reinforcing foundation pit support, which can overcome the defects of the traditional steel pipe or steel pipe concrete inner support, improve the bearing capacity of the inner support, reduce the requirement of flange connection, ensure the quality of a connection part, and does not influence the integral structure of a steel pipe and further the recovery and use of the steel pipe in the process of dismantling the inner supporting structure.
In order to achieve the above purpose, the invention provides the following technical scheme:
the utility model provides an inner support structure for strengthening excavation supporting, includes enclosing purlin and a plurality of steel pipe and supports, wherein, enclose the purlin setting around the excavation, the both ends that the steel pipe supported are stiff end and loose end respectively, every the steel pipe supports stiff end with loose end respectively with relative both sides enclose the purlin and be connected.
Furthermore, in the internal support structure for reinforcing foundation pit support, the loose end is connected with the enclosing purlin through a shaft force meter, and the shaft force meter can apply prestress to the enclosing purlin connected with the loose end.
Furthermore, in the internal support structure for reinforcing foundation pit support, the loose end and the fixed end of the steel pipe support connected with the surrounding purlin on the same side are arranged at intervals.
Further, in the above-mentioned inner support structure for strengthening the foundation pit support, the steel pipe support includes the multistage steel pipe, and the multistage steel pipe connects gradually, and two adjacent steel pipes are connected by the ring flange, and two the tip that the steel pipe is connected all welds one the ring flange, two the ring flange passes through the fastener and connects.
Further, in the internal support structure for reinforcing the foundation pit support, both ends of the steel pipe, which are close to the steel pipe, are provided with a filling hole and an overflow hole; plain concrete can be poured into the steel pipe through the pouring hole; preferably, the pouring hole and the overflow hole are symmetrically arranged along the axis of the steel pipe; preferably, the filling hole and the overflow hole are both welded with orifice pipes, and the orifice pipes protrude out of the steel pipe; and the orifice pipe connected with the perfusion hole is provided with an external thread.
Furthermore, in the internal support structure for reinforcing the foundation pit support, the end parts connected with the two adjacent sections of steel pipes are internally provided with the partition plates, and compared with the pouring hole and the overflow hole, the partition plates are farther away from the end parts of the steel pipes; preferably, the partition plate is connected with the inner wall of the steel pipe in a welding manner; preferably, each end of the steel pipe forms a cylindrical space having an opening with the partition near the end, respectively; the plain concrete is poured in the cylindrical space; and the two cylindrical spaces of the two adjacent sections of the steel pipes are connected into a whole by the plain concrete.
Further, in the internal support structure for reinforcing foundation pit support, a rubber gasket is arranged between the two flange plates for connecting the two adjacent steel pipes, and the rubber gasket is used for sealing; preferably, the thickness of the rubber gasket is 1 cm; preferably, the cross section of the rubber gasket is circular, the inner diameter of the rubber gasket is the same as the inner diameter of the steel pipe, the outer diameter of the rubber gasket is larger than the outer diameter of the flange plate, and bolt holes corresponding to the flange plate are formed in the rubber gasket.
Further, in the internal support structure for reinforcing foundation pit support, the plain concrete is lightweight concrete, so that adverse effects caused by the self weight of the concrete can be reduced; preferably, the plain concrete is micro-expansion concrete, and volume expansion after solidification is beneficial to strengthening connection and providing prestress; preferably, the plain concrete is an early strength concrete that provides strength support for rapid setting after being poured.
Furthermore, in the internal support structure for reinforcing foundation pit support, a plurality of stiffening ribs are uniformly arranged on the periphery of the end part of the steel pipe, and the plurality of stiffening ribs are arranged in a circle around the periphery of the steel pipe; preferably, the stiffening rib is of a right triangle structure, one right-angle side of the right triangle is connected with the outer wall of the steel pipe, and the other right-angle side of the right triangle is connected with the flange plate.
Further, in the internal support structure for reinforcing foundation pit support, the partition plates and the inner walls of the steel pipes which form the cylindrical space are coated with a release agent; the distance between the baffle and the nearest end of the steel pipe is 0.5 m.
The inner supporting structure for reinforcing the foundation pit support is characterized in that a steel pipe is arranged in the inner supporting structure, and plain concrete is poured into the steel pipe after the steel pipe is arranged in the inner supporting structure. After the plain concrete is poured, the supporting force can be quickly formed, the bearing capacity of the steel pipe is improved, and the deformation of the foundation pit is favorably controlled. And the plain concrete bears part of the supporting force, so that the connection requirement of bolts on the flange plate is reduced, the connection strength between two steel pipes is enhanced, and the integrity and the stability of the inner support structure are improved. The inner support structure only pours plain concrete into the end part of the steel pipe, thereby reducing the dead weight of the inner support structure and reducing the installation difficulty of the inner support structure. When the inner support structure is dismantled, the joint is easy to cut, and plain concrete in the steel pipe can be completely taken out without damaging the integrity of the steel pipe, thereby being beneficial to transportation, recovery and use of the steel pipe and reducing the production cost.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. Wherein:
fig. 1 is a schematic plan view of an internal support structure according to an embodiment of the present invention.
FIG. 2 is an enlarged schematic view of portion A of FIG. 1;
FIG. 3 is an enlarged schematic view of portion B of FIG. 1;
FIG. 4 is an enlarged schematic view of a portion C of FIG. 1;
FIG. 5 is a schematic structural diagram of a steel pipe according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a rubber gasket according to an embodiment of the present invention.
Fig. 7 is a schematic structural view of a steel pipe separated from plain concrete according to an embodiment of the present invention.
Description of reference numerals: 1, supporting a steel pipe; 2, a loose end; 21 a second connection section; a 22-axis force meter; 3, fixing the end; 31 a base plate; 32 ribs; 33 a first connection section; 4, enclosing a purlin; 5, a flange plate; 6 a rubber gasket; 61, opening; 7 a partition board; 8 plain concrete; 9 filling holes; 10 overflow holes; 11 an expansion hook; 12, steel pipes; 14 a stiffener; 15 a fastener; 16 cylindrical space.
Detailed Description
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings. The various examples are provided by way of explanation of the invention, and not limitation of the invention. In fact, it will be apparent to those skilled in the art that modifications and variations can be made in the present invention without departing from the scope or spirit thereof. For instance, features illustrated or described as part of one embodiment, can be used with another embodiment to yield a still further embodiment. It is therefore intended that the present invention encompass such modifications and variations as fall within the scope of the appended claims and equivalents thereof.
In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are for convenience of description of the present invention only and do not require that the present invention must be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. The terms "connected," "connected," and "disposed" as used herein are intended to be broadly construed, and may include, for example, fixed and removable connections; can be directly connected or indirectly connected through intermediate components; the connection may be a wired electrical connection, a wireless electrical connection, or a wireless communication signal connection, and a person skilled in the art can understand the specific meaning of the above terms according to specific situations.
One or more examples of the invention are illustrated in the accompanying drawings. The detailed description uses numerical and letter designations to refer to features in the drawings. Like or similar designations in the drawings and description have been used to refer to like or similar parts of the invention.
As shown in fig. 1 to 7, according to an embodiment of the present invention, an inner support structure for reinforcing a foundation pit support is provided, the inner support structure is used for resisting a fender pile from moving into a foundation pit, and enhancing integrity of a support structure, as shown in fig. 1, the inner support structure includes a purlin 4 and a plurality of steel pipe supports 1, wherein the purlin 4 is arranged on the support structure around the foundation pit, two ends of each steel pipe support 1 are a fixed end 3 and a loose end 2, and the fixed end 3 and the loose end 2 of each steel pipe support 1 are respectively connected with two opposite side purlins 4. Stiff end 3 contains bottom plate 31, a plurality of rib 32, first linkage segment 33 and the flange 5 that connects gradually, and wherein the one end of bottom plate 31 is connected with purlin 4, and the other end of bottom plate 31 is connected with the one end of a plurality of ribs 32, and the other end of a plurality of ribs 32 all is connected with the one end of first linkage segment 33. The rib 32 and the bottom plate 31 are connected by welding, and the rib 32 and the first connecting section 33 are connected by welding. The other end of the first connecting section 33 is connected to the flange 5. And a plurality of stiffening ribs 14 are uniformly arranged on the periphery of the end part of the steel pipe, and a circle of the stiffening ribs 14 is arranged around the periphery of the other end of the first connecting section 33. The flange 5 arranged on the fixed end 3 is connected with the flange 5 arranged at the end part of the steel pipe support 1 through a fastener 15, so that the steel pipe support 1 is connected with the surrounding purlin 4.
Further, as shown in fig. 4, the loose end 2 is connected to the surrounding purlin 4 through an axial force meter 22, the loose end 2 includes the axial force meter 22, a second connecting section 21 and a flange 5 which are connected in sequence, wherein one end of the axial force meter 22 is connected to the surrounding purlin 4, the other end of the axial force meter 22 is connected to one end of the second connecting section 21, and the other end of the second connecting section 21 is connected to the flange 5. And a plurality of stiffening ribs 14 are uniformly arranged on the periphery of the end part of the steel pipe, and a circle of the stiffening ribs 14 is arranged around the periphery of the other end of the second connecting section 21. One flange 5 arranged on the loose end 2 is connected with one flange 5 arranged at the end part of the steel pipe support 1 through a fastener 15, so that the steel pipe support 1 is connected with the surrounding purlin 4.
The axial force meter 22 can apply horizontal prestress to the surrounding purlin 4 connected with the adjustable end 2, and the axial force meter 22 can control the applied horizontal prestress to realize the same horizontal prestress applied to the steel pipe supports 1. The horizontal prestressing force that axial force meter 22 was applyed can make steel pipe support 1 top tightly enclose purlin 4, and then makes steel pipe support 1 resist the fender pile through enclosing purlin 4 and remove to the foundation ditch, strengthens envelope's wholeness, reduces the deformation of foundation ditch.
Further, as shown in fig. 1, the plurality of steel pipe supports 1 are all located on the same plane, the axes of the plurality of steel pipe supports 1 are all parallel, and the loose ends 2 and the fixed ends 3 of the steel pipe supports 1 connected with the surrounding purlin 4 on the same side are arranged at intervals. Namely, one steel pipe support 1 connected with one side surrounding purlin 4 through the fixed end 3, and two adjacent steel pipe supports 1 are connected with the same side surrounding purlin 4 through the loose end 2. Through the staggered arrangement of the loose ends 2 and the fixed ends 3, the enclosing structure is stressed uniformly, and the phenomenon that the enclosing purlin 4 on one side is stressed too much is avoided.
The vertical distance between two adjacent steel pipe supports 1 is determined according to specific engineering conditions.
Further, the steel pipe support 1 comprises a plurality of sections of steel pipes 12, the steel pipes 12 are circular hollow steel pipes, the sections of steel pipes 12 are connected in sequence, two adjacent sections of steel pipes 12 are connected through flanges 5, the flanges 5 are circular, the diameter of the inner ring of each flange 5 is the same as the inner diameter of the corresponding steel pipe 12, a plurality of bolt holes are formed in the flanges 5, one flange 5 is welded to the end portion where the two sections of steel pipes 12 are connected, and the two flanges 5 are connected through fasteners 15. The fastening piece 15 comprises a bolt and a nut, the bolt sequentially penetrates through bolt holes of the two flange plates 5 and then is connected with the nut, and the two flange plates 5 are tightly connected by matching with a torque wrench.
Further, as shown in fig. 2 to 4, a pouring hole 9 and an overflow hole 10 are provided on the steel pipe 12 and near both ends of the steel pipe 12; preferably, the pouring hole 9 and the overflow hole 10 are arranged symmetrically with respect to the axis of the steel pipe 12, the pouring hole 9 is located on the lower side surface of the steel pipe 12, the overflow hole 10 is located on the upper side surface of the steel pipe 12, the plain concrete 8 can be poured into the steel pipe 12 through the pouring hole 9, when the plain concrete 8 overflows from the overflow hole 10 when the steel pipe 12 is poured with the plain concrete 8 through the pouring hole 9, the pouring is stopped, and at this time, the cylindrical space 16 is filled with the plain concrete 8; preferably, the filling hole 9 and the overflow hole 10 are both welded with orifice pipes which protrude out of the steel pipe 12; an external thread is arranged on the orifice pipe connected with the perfusion hole 9. The orifice pipe connected with the filling hole 9 can be conveniently connected with a grouting pipeline by the arrangement.
Furthermore, the connecting end parts of the two adjacent sections of steel pipes 12 are internally provided with a partition plate 7, the partition plate 7 is a round steel partition plate, and compared with the pouring hole 9 and the overflow hole 10, the partition plate 7 is farther away from the end parts of the steel pipes 12; preferably, the partition 7 is welded with the inner wall of the steel pipe 12; preferably, each end of the steel pipe 12 forms a cylindrical space 16 with an opening with the partition 7 near the end, and the part of the steel pipe 12 between the two partitions 7 is a closed structure. That is, the steel pipe 12 is divided by the circular partition 7 into a central closed space and semi-closed spaces (cylindrical spaces 16) at both ends. On the premise of achieving the safety effect, considering that the later-stage dismantling is convenient, and the using amount of plain concrete is reduced, the length of the concrete on one side is preferably 0.5 m, the length of the whole cylindrical space 16 in the two adjacent steel pipes 12 is 1 m, namely, the distance between the partition plate 7 and the nearest end part of the steel pipe 12 is preferably 0.5 m.
Preferably, the partition plates 7 and the inner wall of the steel pipe 12 forming the cylindrical space 16 are coated with a release agent, the plain concrete 8 is used in combination with the steel pipe 12, the bearing capacity of the steel pipe 12 is improved, and the release agent can retain the integrity of the steel pipe 12, so that the steel pipe 12 can be recycled. When the internal support structure is dismantled, as shown in fig. 7, firstly, the expansion hooks 11 are driven into the plain concrete 8, the plain concrete 8 is taken out by the expansion hooks 11 with the filling holes 9 and the overflow holes 10 as fixed points, and the release agents are coated on the inner walls of the partition plates 7 and the steel pipes 12, so that the connection strength between the plain concrete 8 and the inner walls of the partition plates 7 and the steel pipes 12 can be reduced, the dismantling difficulty of the internal support structure is reduced, the steel pipes 12 can be recycled, and the production cost is reduced.
Further, as shown in fig. 3 and 6, a rubber gasket 6 with a gap 61 is arranged between the two flanges 5 for connecting the two adjacent steel pipes 12, and the rubber gasket 6 is used for sealing; preferably, the cross section of the rubber gasket 6 is circular, the inner diameter of the rubber gasket 6 is the same as the inner diameter of the steel pipe 12, the outer diameter of the rubber gasket 6 is larger than the outer diameter of the flange 5, and the rubber gasket 6 is provided with bolt holes corresponding to the flange 5. When the inner supporting structure is installed, the rubber gasket 6 is cut off, a notch 61 is formed at the cut-off position, and when the inner supporting structure is disassembled, the rubber gasket 6 can be conveniently disassembled. The thickness of the rubber mat is preferably 1cm in consideration of feasibility of later cutting of the plain concrete 8.
Further, the plain concrete 8 is lightweight concrete, so that adverse effects caused by the self weight of the concrete can be reduced; preferably, the plain concrete 8 is micro-expansion concrete, and volume expansion after solidification is beneficial to strengthening connection and providing prestress; preferably, plain concrete 8 provides strength support for early strength concrete, which sets quickly after being poured.
Furthermore, a plurality of stiffening ribs 14 are uniformly arranged on the periphery of the end part of the steel pipe 12, and the plurality of stiffening ribs 14 are arranged around the periphery of the steel pipe 12. Preferably, the stiffening rib 14 is a right triangle structure, one cathetus of the right triangle is connected with the outer wall of the steel pipe 12, and the other cathetus of the right triangle is connected with the flange 5. This arrangement can improve the connection strength between the end of the steel pipe 12 and the flange 5.
The construction method of the inner support structure for reinforcing the foundation pit support comprises the following steps:
1, mounting of the support structure:
1.1, coating a release agent on the inner wall of the steel pipe 12 forming the cylindrical space 16 and the surface of the partition plate 7; 1.2, sequentially connecting a fixing piece, a plurality of sections of steel pipes 12 and an axial force meter 22 to form a steel pipe support 1, fixing the fixing piece on an enclosing purlin 4 on one side, connecting the axial force meter 22 with the enclosing purlin 4 on the other side, and applying prestress to the steel pipe support 1 through the axial force meter 22; 1.3, injecting plain concrete 8 through the pouring hole 9, stopping injecting when cement paste of the plain concrete 8 continuously overflows from the overflow hole 10, and filling the plain concrete 8 in the joint of the flange 5 and the cylindrical space 16;
2 after the excavation of foundation ditch finishes, demolish internal bearing structure:
2.1 the flange 5 is disassembled, 2.2 the rubber gasket 6 is taken down, 2.3 the plain concrete 8 is cut, 2.4 the expansion hook 11 is driven into the plain concrete 8, the expansion hook 11 takes the filling hole 9 and the overflow hole 10 as fixed points, the plain concrete 8 is taken out, and 2.5 the steel pipe 12 is recovered.
From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:
an inner supporting structure for reinforcing foundation pit support is characterized in that plain concrete is poured after a steel pipe 12 is installed in the construction process of the inner supporting structure, and transportation and installation of the steel pipe 12 are facilitated. After the plain concrete is poured, the steel pipe support 1 can quickly form a supporting force, so that the bearing capacity of the steel pipe 12 is improved, and the deformation of a foundation pit is favorably controlled. The application of the horizontal prestress of the steel pipe support 1 is not influenced, after the steel pipes 12 are connected, the prestress is applied through the loose end 2 with the axial force meter 22 according to the traditional construction method, and then the plain concrete 8 is poured after the prestress is applied. And plain concrete bears part of the supporting force, so that the connection requirement of bolts on the flange plate 5 is reduced, the connection strength between the two steel pipes 12 is enhanced, and the integrity and the stability of the inner support structure are improved. The inner support structure is only used for pouring plain concrete 8 into the end part (the space close to the flange plate 5) of the steel pipe 12, so that the using amount of concrete is reduced, the self weight of the inner support structure is reduced, and the installation difficulty of the inner support structure and the recycling difficulty of the steel pipe 12 are reduced. When the inner support structure is dismantled, the joint between the two sections of steel pipes 12 is easy to cut, and plain concrete in the steel pipes 12 can be completely taken out without damaging the integrity of the steel pipes 12, thereby being beneficial to the recovery and use of the steel pipes 12 and reducing the production cost.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An inner supporting structure for reinforcing foundation pit support, which is characterized by comprising an enclosing purlin and a plurality of steel pipe supports, wherein,
the enclosing purlins are arranged around the foundation pit, two ends of each steel pipe support are respectively a fixed end and a movable end, and the fixed end and the movable end of each steel pipe support are respectively connected with the enclosing purlins on two opposite sides.
2. The internal support structure for reinforcing foundation pit support according to claim 1,
the loose end is connected with the enclosing purlin through a shaft force meter, and the shaft force meter can apply prestress to the enclosing purlin connected with the loose end.
3. The internal support structure for reinforcing foundation pit support according to claim 1,
the movable end and the fixed end of the steel pipe support connected with the surrounding purlin on the same side are arranged at intervals.
4. The internal support structure for reinforcing foundation pit support according to claim 1,
the steel pipe supports comprise a plurality of sections of steel pipes, the steel pipes are connected in sequence, two adjacent sections of steel pipes are connected through flanges, one flange is welded at the end part where the two sections of steel pipes are connected, and the two flanges are connected through fasteners.
5. The internal support structure for reinforcing foundation pit support according to claim 4,
both ends of the steel pipe close to the steel pipe are provided with a filling hole and an overflow hole;
plain concrete can be poured into the steel pipe through the pouring hole;
the filling hole and the overflow hole are symmetrically arranged along the axis of the steel pipe;
the filling hole and the overflow hole are both welded with orifice pipes, and the orifice pipes protrude out of the steel pipe;
and the orifice pipe connected with the perfusion hole is provided with an external thread.
6. The internal support structure for reinforcing foundation pit support according to claim 5,
the end parts connected with two adjacent sections of the steel pipes are internally provided with a clapboard,
the partition plate is farther from the end of the steel pipe than the filling hole and the overflow hole;
the partition plate is welded and connected with the inner wall of the steel pipe;
each end of the steel pipe forms a cylindrical space with an opening with the partition board close to the end;
the plain concrete is poured in the cylindrical space;
and the two cylindrical spaces of the two adjacent sections of the steel pipes are connected into a whole by the plain concrete.
7. The internal support structure for reinforcing foundation pit support according to claim 4,
a rubber gasket is arranged between the two flange plates for connecting the two adjacent steel pipes and used for sealing;
the thickness of the rubber gasket is 1 cm;
the section of the rubber gasket is circular, the inner diameter of the rubber gasket is the same as that of the steel pipe, the outer diameter of the rubber gasket is larger than that of the flange plate,
and the rubber gasket is provided with bolt holes corresponding to the flange plates.
8. The internal support structure for reinforcing foundation pit support according to claim 6,
the plain concrete is light concrete, so that adverse effects caused by the self weight of the concrete can be reduced;
the plain concrete is micro-expansion concrete, and volume expansion after solidification is beneficial to strengthening connection and providing prestress;
the plain concrete is early-strength concrete and provides strength support for rapid solidification after pouring.
9. The internal support structure for reinforcing foundation pit support according to claim 1,
stiffening ribs are arranged between the periphery of the end part of the steel pipe and the flange plate, a plurality of stiffening ribs are uniformly arranged on the periphery of the end part of the steel pipe, and a circle of the stiffening ribs surrounds the periphery of the steel pipe;
the stiffening ribs are of a right-angled triangle structure, one right-angled side of the right-angled triangle is connected with the outer wall of the steel pipe, and the other right-angled side of the right-angled triangle is connected with the flange plate.
10. The internal support structure for reinforcing foundation pit support according to claim 6,
the partition plate and the inner wall of the steel pipe which form the cylindrical space are coated with a release agent;
the distance between the baffle and the nearest end of the steel pipe is 0.5 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022796125.3U CN214363501U (en) | 2020-11-27 | 2020-11-27 | Inner supporting structure for reinforcing foundation pit support |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022796125.3U CN214363501U (en) | 2020-11-27 | 2020-11-27 | Inner supporting structure for reinforcing foundation pit support |
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| CN214363501U true CN214363501U (en) | 2021-10-08 |
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| CN202022796125.3U Active CN214363501U (en) | 2020-11-27 | 2020-11-27 | Inner supporting structure for reinforcing foundation pit support |
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