CN115788526A - Reusable assembled temporary supporting structure and application method thereof - Google Patents
Reusable assembled temporary supporting structure and application method thereof Download PDFInfo
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- CN115788526A CN115788526A CN202211523558.9A CN202211523558A CN115788526A CN 115788526 A CN115788526 A CN 115788526A CN 202211523558 A CN202211523558 A CN 202211523558A CN 115788526 A CN115788526 A CN 115788526A
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Abstract
The invention provides a reusable assembled temporary support structure which comprises a vertical support member and a U-shaped steel plate for supporting a tunnel inner arch section steel frame, wherein the vertical support member comprises a first steel pipe, a steel sleeve and a second steel pipe, one end of the first steel pipe is detachably connected with the U-shaped steel plate, the other end of the first steel pipe extends into the steel sleeve and is detachably connected with the steel sleeve, one end of the second steel pipe extends into the steel sleeve and is detachably connected with the steel sleeve, the other end of the second steel pipe is provided with a plurality of supports supported on a tunnel ground bedrock, the bottom of the steel sleeve is provided with a plurality of reaction frames, the reaction frames are positioned right above the supports, the reaction frames correspond to the supports one to one, the vertical support member further comprises a lifting piece for jacking the reaction frames, and the lifting piece is placed on the supports. The invention also provides an application method of the reusable assembled temporary support structure.
Description
Technical Field
The invention relates to the technical field of tunnel engineering support, in particular to a reusable assembled temporary support structure and an application method thereof.
Background
With the rapid development of urban rail transit and the progress of tunnel construction technology, more and more large-span tunnels are put into construction in recent years. And the large-span tunnel mostly adopts subsection excavation, and temporary support is adopted in a large quantity based on the unloading span-reducing mechanism. The existing temporary support mostly adopts section steel, the installation and dismantling time is long, the operation is complex, the time of primary support sealing ring formation is influenced, the material waste is caused due to the fact that the section steel cannot be reused, and therefore an assembly type temporary support structure which can be reused and is simple and easy to install is needed.
Disclosure of Invention
The invention provides a reusable assembled temporary support structure, aims to provide a temporary support structure which is environment-friendly, simple in structure, convenient to install and dismantle, capable of reducing construction cost and capable of supporting in multiple directions, assembling modules and recycling, and at least solves part of problems in the prior art.
The invention is realized in the following way:
the invention provides a reusable assembled temporary support structure which comprises a vertical support member and a U-shaped steel plate for supporting a tunnel inner arch section steel frame, wherein the vertical support member comprises a first steel pipe, a steel sleeve and a second steel pipe, one end of the first steel pipe is detachably connected with the U-shaped steel plate, the other end of the first steel pipe extends into the steel sleeve and is detachably connected with the steel sleeve, one end of the second steel pipe extends into the steel sleeve and is detachably connected with the steel sleeve, the other end of the second steel pipe is provided with a plurality of supports supported on a tunnel ground bedrock, the bottom of the steel sleeve is provided with a plurality of reaction frames, the reaction frames are positioned right above the supports, the reaction frames correspond to the supports one to one, the vertical support member further comprises a lifting piece for jacking the reaction frames, and the lifting piece is placed on the supports.
Further, interim bearing structure of assembled still includes the steel sheet, the one end and the steel sheet welding of first steel pipe, the steel sheet with U shaped steel plate passes through bolted connection.
Further, a hole is reserved in the upper end of the steel sleeve and is used for being connected with the first steel pipe through a bolt.
Furthermore, a channel is reserved at the lower end of the steel sleeve and is used for connecting the second steel pipe through a bolt.
Furthermore, the contact surface of the support and the ground bedrock of the tunnel is in a sawtooth shape.
Further, the hoisting member is a jack.
Further, the interim bearing structure of assembled still includes diagonal bracing member, diagonal bracing member includes connector link, two third steel pipes, two fourth steel pipes, the upper end of steel sleeve is equipped with a plurality of bulge loops that the interval set up, the connector link cover is established and is fixed in the outside of bulge loop, the connector link includes two arcs, two the one end of arc is passed through the axle core and is articulated, two the arc all can be around the axle core rotation, two the other end of arc passes through bolt fastening, the one end of third steel pipe with arc rotatable coupling, the third steel pipe with the arc one-to-one, the other end of third steel pipe stretches into in the fourth steel pipe and can dismantle with the fourth steel pipe and be connected, the one end that the third steel pipe was kept away from to the fourth steel pipe is equipped with the flat support of fixing on the wall country rock of tunnel both sides.
Further, two all be equipped with a steel sheet that has the round hole on the arc, the one end of third steel pipe is equipped with two connection hole boards, and the steel sheet that has the round hole stretches into two between the connection hole board, the steel sheet that has the round hole with two the connection hole board passes through the bolt and links to each other for the third steel pipe with arc rotatable coupling.
Furthermore, a groove is reserved on the fourth steel pipe and is used for connecting the third steel pipe with a bolt.
The invention also provides an application method of the reusable assembled temporary support structure, which comprises the following steps:
s1, when a tunnel is excavated in a subsection mode, measuring the height of a pilot tunnel after the left subsection of an upper step is excavated, adjusting the length of a vertical supporting member to be the height corresponding to the pilot tunnel by sliding a first steel pipe, and fixing the first steel pipe through bolts;
s2, constructing a left segmental arch section steel frame, transporting the vertical supporting members to an installation position, erecting the vertical supporting members through mechanical equipment or manpower, adjusting the relative positions of the second steel pipe and the steel sleeve through a hoisting piece, aligning a U-shaped steel plate on the vertical supporting members with the end part of the left segmental arch section steel frame, welding the end part of the left segmental arch section steel frame with the U-shaped steel plate, and supporting a support of the second steel pipe on the lower step bedrock;
s3, after the upper step is dug in the right section, constructing a right section arch section steel support, and welding the end part of the right section arch section steel support with a U-shaped steel plate;
s4, after the upper steps are excavated, fixing the connecting buckle on the steel sleeve, and simultaneously connecting and adjusting the lengths of the fourth steel pipe and the third steel pipe to fix the flat support of the fourth steel pipe on the surrounding rocks of the side walls at two sides to achieve the effect of oblique support;
s5, after the left subsection excavation of the lower step is finished, constructing a side wall type steel support and an inverted arch type steel support, removing the inclined supporting member, and adjusting the relative positions of the first steel pipe and the second steel pipe through bolts and jacks to enable the support of the second steel pipe to be supported on the inverted arch basement rock;
s6, when the vertical supporting member is dismounted, the bolt is unscrewed to release the connection between the U-shaped steel plate and the steel plate, the bolt is rotated to enable the first steel pipe and the second steel pipe to be retracted into the steel sleeve, and the vertical supporting member is recovered and transported to a position needing temporary supporting to be recycled.
The invention has the following beneficial effects:
1. according to the reusable assembled temporary supporting structure, the U-shaped steel plate is used for replacing the connecting plate to weld the arch section steel support, and the U-shaped steel plate is connected with the temporary support through the bolts, so that the temporary support can be disassembled simply by unscrewing the bolts, and the structure is simple and convenient.
2. The reusable assembled temporary supporting structure can adjust the height of the temporary vertical support and the height of the inclined support through the extension and retraction of the steel pipes, is suitable for tunnels with various sections, can support in multiple directions, and is high in flexibility and applicability.
3. According to the reusable assembled temporary support structure, all parts and nodes of the support structure are prefabricated modules, so that the module assembling function can be realized, the support structure is not damaged when the temporary support is disassembled after use, the support structure can be recycled, the environment is protected, and the project cost can be effectively reduced.
4. The reusable assembled temporary support structure can be adjusted in length, and when a lower step is dug in a tunnel subsection mode, a lower step vertical support does not need to be constructed independently and welded with an upper step vertical support.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of an embodiment of a temporary support;
FIG. 2 is a schematic illustration of a temporary vertical support according to an embodiment of the present invention;
fig. 3 is a schematic diagram illustrating a disassembly of a temporary lateral brace according to an embodiment of the present invention;
FIG. 4 is a schematic view of a connector according to an embodiment of the present invention;
FIG. 5 is a detail view of the connection location of the vertical support and the lateral brace provided by the embodiment of the present invention;
FIG. 6 is a detailed view of the bottom end of the temporary support provided by an embodiment of the present invention;
FIG. 7 is a schematic diagram of an embodiment of the present invention;
FIG. 8 is a schematic diagram of a second embodiment of the present invention;
fig. 9 is a third schematic diagram of an implementation manner provided by an embodiment of the invention.
In the figure: 1-U-shaped steel plate, 2-steel plate, 3-first steel pipe, 4-second steel pipe, 5-steel sleeve, 6-bolt, 7-jack, 8-connecting buckle, 8-1-shaft core, 9-third steel pipe and 10-fourth steel pipe.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of the present invention, "a plurality" means two or more unless otherwise specified.
Referring to fig. 1 to 9, an embodiment of the present invention provides a reusable fabricated temporary support structure, which includes a U-shaped steel plate 1, a steel plate 2, a first steel pipe 3, a second steel pipe 4, a steel sleeve 5, a bolt 6, a jack 7, a connecting buckle 8, a shaft core 8-1, a third steel pipe 9, and a fourth steel pipe 10. The first steel pipe 3 is connected with the steel plate 2, the second steel pipe 4 is provided with four supports, the steel sleeve 5 is provided with four reaction frames, the third steel pipe 9 is provided with two connecting pore plates, and the fourth steel pipe 10 is provided with a flat support.
The U-shaped steel plate 1 is connected with the steel plate 2 through bolts; the steel plate 2 is welded with the first steel pipe 3; the inner diameter of the first steel pipe 3 is 18-22 cm, and the wall thickness is 2-4 cm; the inner diameter of the second steel pipe 4 is consistent with that of the first steel pipe 3, the wall thickness is 2-4 cm, the length is not more than 1m, and the contact surfaces of the four supports and the ground are in a sawtooth shape.
The inner diameter of the steel sleeve 5 is slightly larger than that of the first steel pipe 3 and the second steel pipe 4, the steel sleeve can be just sleeved outside the first steel pipe 3 and the second steel pipe 4, the wall thickness is 2-4 cm, the length is 4-10 m, and the specific length is determined according to the actual tunnel height; the upper area of the steel sleeve 5 is provided with convex rings which are distributed at intervals up and down, and the space between four reaction frames at the bottom of the steel sleeve 5 corresponds to the space between four supports; the distance between the four reaction frames and the near end of the steel sleeve is about 5-10 cm.
Further, the total length of the first steel pipe 3 and the second steel pipe 4 is similar to that of the steel sleeve 5.
Further, the first steel pipe 3, the second steel pipe 4 and the steel sleeve 5 are fixed at relative positions by bolts 6; a hole is reserved above the steel sleeve 5 for connecting a bolt 6 with the first steel pipe 3; and a channel is reserved at one end of the steel sleeve 5 close to the reaction frame for connecting a bolt 6 with the second steel pipe 4.
Furthermore, the connecting buckle 8 consists of two parts which can rotate around the shaft core 8-1 and can be just sleeved on the steel sleeve 5 with the convex ring; the connecting buckle 8 can be fixed by the bolt 6 after being sleeved on the steel sleeve 5, steel plates with round holes are symmetrically distributed on the outer side of the connecting buckle 8, the steel plates with the round holes stretch into the space between the two connecting pore plates of the third steel pipe 9, and the steel plates with the round holes are connected with the two connecting pore plates through the bolt 6, so that the third steel pipe 9 is rotatably connected with the connecting buckle 8.
The connecting buckle 8 corresponds to the convex ring on the steel sleeve 5, and the fixing position can be adjusted up and down; the third steel pipe 9 can rotate around the bolt 6 connected with the connecting buckle 8, and the lateral supporting position can be flexibly adjusted.
Further, the fourth steel pipe 10 and the third steel pipe 9 have the same length, and can slide to adjust the supporting length, and a channel is reserved in the fourth steel pipe 10 for the bolt 6 to connect with the third steel pipe 9; the inner diameter of the third steel pipe 9 is 8-10 cm, and the wall thickness is 2-4 cm; the inner diameter of the fourth steel pipe 10 is slightly larger than that of the third steel pipe 9, the wall thickness is 2-4 cm, and the fourth steel pipe can be just sleeved on the third steel pipe 9.
Further, a reusable fabricated temporary support structure comprising the steps of:
step 1, when a tunnel adopts subsection excavation, taking a two-step CD method as an example, dividing the section of the tunnel into two layers of four subsections, firstly excavating a left subsection, measuring the height of a pilot tunnel after the excavation of the upper step left subsection is finished, adjusting the length of a temporary support to a corresponding height by sliding a first steel pipe 3, and fixing the temporary support by bolts 6;
and 6, when the temporary support is detached, unscrewing the bolts to release the connection between the U-shaped steel plate 1 and the steel plate 2, rotating the bolts 6 to enable the first steel pipe 3 and the second steel pipe 4 to be retracted into the steel sleeve 5, completing the retraction of the temporary support, and transporting the temporary support to a position needing the temporary support to realize the recycling.
Further, the temporarily supported vertical supporting members can be implemented independently, and a schematic diagram of an embodiment can be seen.
Further, the temporary supports are connected with the temporary supports through third steel pipes 9, the third steel pipes 9 can be nested with each other, bolts are fixed, the length is adjustable, flexibility and changeability are achieved, finally, the modular assembling function can be achieved, and the third schematic diagram of the implementation mode can be seen specifically.
Details not described in this specification are within the skill of the art that are well known to those skilled in the art.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A temporary bearing structure of assembled of repeatedly usable which characterized in that: the steel frame supporting device comprises a vertical supporting component and a U-shaped steel plate (1) used for supporting a tunnel inner arch section steel frame, wherein the vertical supporting component comprises a first steel pipe (3), a steel sleeve (5) and a second steel pipe (4), one end of the first steel pipe (3) is detachably connected with the U-shaped steel plate (1), the other end of the first steel pipe (3) extends into the steel sleeve (5) and is detachably connected with the steel sleeve (5), one end of the second steel pipe (4) extends into the steel sleeve (5) and is detachably connected with the steel sleeve (5), the other end of the second steel pipe (4) is provided with a plurality of supports supported on a tunnel ground bedrock, the bottom of the steel sleeve (5) is provided with a plurality of reaction frames, the reaction frames are located above the supports, the reaction frames correspond to the supports one by one to one, the vertical supporting component further comprises a lifting piece used for jacking the reaction frames, and the lifting piece is placed on the supports.
2. The reusable fabricated temporary support structure of claim 1, wherein: still include steel sheet (2), the one end and the steel sheet (2) welding of first steel pipe (3), steel sheet (2) with U shaped steel board (1) passes through bolted connection.
3. The reusable fabricated temporary support structure of claim 1, wherein: and a hole is reserved at the upper end of the steel sleeve (5) for connecting a bolt (6) with the first steel pipe (3).
4. The reusable fabricated temporary support structure of claim 1, wherein: and a groove channel is reserved at the lower end of the steel sleeve (5) for connecting the bolt (6) with the second steel pipe (4).
5. The reusable fabricated temporary support structure of claim 1, wherein: the contact surface of the support and the ground bedrock of the tunnel is in a sawtooth shape.
6. The reusable fabricated temporary support structure of claim 1, wherein: the hoisting member is a jack (7).
7. The reusable fabricated temporary support structure of claim 1, wherein: still include the diagonal bracing member, the diagonal bracing member includes connector link (8), two third steel pipes (9), two fourth steel pipes (10), the upper end of steel sleeve (5) is equipped with a plurality of bulge loops that the interval set up, connector link (8) cover is established and is fixed in the outside of bulge loop, connector link (8) include two arcs, two the one end of arc is passed through axle core (8-1) and is articulated, two the arc all can be rotatory around axle core (8-1), two the other end of arc passes through bolt (6) and fixes, the one end of third steel pipe (9) with arc rotatable coupling, third steel pipe (9) with the arc one-to-one, the other end of third steel pipe (9) stretches into in fourth steel pipe (10) and can dismantle with fourth steel pipe (10) and be connected, the one end that third steel pipe (9) were kept away from to fourth steel pipe (10) is equipped with the flat support of fixing on the wall country rock of tunnel both sides.
8. The reusable fabricated temporary support structure of claim 7, wherein: two all be equipped with a steel sheet that has the round hole on the arc, the one end of third steel pipe (9) is equipped with two connection orifice plates, and the steel sheet that has the round hole stretches into two between the connection orifice plate, the steel sheet that has the round hole with two the connection orifice plate passes through bolt (6) and links to each other for third steel pipe (9) with arc rotatable coupling.
9. The reusable fabricated temporary support structure of claim 7, wherein: and a groove channel is reserved on the fourth steel pipe (10) for connecting the bolt (6) with the third steel pipe (9).
10. A method of using a reusable fabricated temporary support structure, comprising the steps of:
s1, when a tunnel is excavated in a subsection mode, the height of a pilot tunnel is measured after the left subsection excavation of an upper step is finished, the length of a vertical supporting component is adjusted to be the height corresponding to the pilot tunnel through sliding a first steel pipe (3), and the first steel pipe (3) is fixed through a bolt (6);
s2, construct and do left subsection arch shaped steel steelframe, transport vertical support component to mounted position, through mechanical equipment or the artifical vertical support component that stands up, adjust the relative position of second steel pipe (4) and steel sleeve (5) through the hoisting member, make U shaped steel board (1) on the vertical support component align with left subsection arch shaped steel steelframe tip, with left subsection arch shaped steel steelframe tip and U shaped steel board (1) welding, the support of second steel pipe (4) supports on lower step bedrock;
s3, after the excavation of the right part of the upper step is finished, applying a right part arch section steel support, and welding the end part of the right part arch section steel support with the U-shaped steel plate (1);
s4, after the upper steps are excavated, fixing the connecting buckle (8) on the steel sleeve (5), and simultaneously connecting and adjusting the lengths of the fourth steel pipe (10) and the third steel pipe (9) to fix the flat support of the fourth steel pipe (10) on the surrounding rocks of the side walls at two sides to achieve the effect of oblique support;
s5, after the left subsection of the lower step is excavated, constructing a side wall type steel support and an inverted arch type steel support, removing the inclined supporting member, and adjusting the relative positions of the first steel pipe (3) and the second steel pipe (4) through a bolt (6) and a jack (7) to enable the support of the second steel pipe (4) to be supported on the inverted arch bedrock;
s6, when the vertical supporting member is dismantled, the bolt is unscrewed to remove the connection between the U-shaped steel plate (1) and the steel plate (2), the bolt (6) is rotated to enable the first steel pipe (3) and the second steel pipe (4) to be retracted into the steel sleeve (5), and the vertical supporting member is recovered and transported to a position needing temporary supporting to be recycled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211523558.9A CN115788526A (en) | 2022-11-30 | 2022-11-30 | Reusable assembled temporary supporting structure and application method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211523558.9A CN115788526A (en) | 2022-11-30 | 2022-11-30 | Reusable assembled temporary supporting structure and application method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115788526A true CN115788526A (en) | 2023-03-14 |
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ID=85444015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211523558.9A Pending CN115788526A (en) | 2022-11-30 | 2022-11-30 | Reusable assembled temporary supporting structure and application method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115788526A (en) |
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2022
- 2022-11-30 CN CN202211523558.9A patent/CN115788526A/en active Pending
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