CN213574126U - Steel frame supporting structure for vertical jacking excavation method - Google Patents
Steel frame supporting structure for vertical jacking excavation method Download PDFInfo
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- CN213574126U CN213574126U CN202022460188.1U CN202022460188U CN213574126U CN 213574126 U CN213574126 U CN 213574126U CN 202022460188 U CN202022460188 U CN 202022460188U CN 213574126 U CN213574126 U CN 213574126U
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Abstract
The utility model relates to the field of building components, and discloses a steel frame supporting structure for a vertical jacking excavation method, which comprises an arch support and a plurality of layers of rectangular supports, wherein the arch support is arranged on the rectangular support at the uppermost layer; the rectangular bracket is formed by connecting two cross beams and two longitudinal beams, the arched bracket comprises a plurality of groups of parallel arc-shaped beams, and two ends of each arc-shaped beam are respectively fixed on the two cross beams of the topmost rectangular bracket; the upper and lower layers of rectangular supports are connected through a supporting steel pipe. Use the utility model relates to a supporting structure that inclined shaft advances the excavation of positive hole has saved the use of a large amount of steel shotcrete portal and other interim supports, has reduced the waste, and this steel framed supporting structure easy dismounting, can reuse.
Description
Technical Field
The utility model relates to a building element field particularly, relates to a steelframe bearing structure for perpendicular jacking excavation method.
Background
The common construction methods for the inclined shaft to enter the main hole include the following steps:
1. the method of straight line climbing and pilot hole (such as 'big packet method') has the following problems: firstly, a main hole and a secondary hole at the connection part of an inclined shaft entering a main hole need larger expanding excavation amount; secondly, the tunnel expanding and excavating part is concentrated at the vault, and the backfilling of the poured concrete is inconvenient; thirdly, a large amount of concrete needs to be backfilled in the tunnel expanding and digging part to generate redundant load on the supporting structure;
2. the method of curve climbing pilot tunnel (such as arc pilot tunnel method) has the following disadvantages: firstly, the difficulty in surveying and mapping is increased by a curve climbing route; secondly, the construction working face at the joint part of the pilot tunnel entering the main tunnel is narrow, and a large tool cannot be applied; the requirement of curve climbing on the protection of surrounding rocks is high, multiple steps are needed for ascending and excavating, the conversion time of construction procedures is long, the surrounding rocks cannot be sealed by timely sprayed concrete, and the weathering of the surrounding rocks is severe;
3. the construction method for turning and jacking the small pilot tunnel has the following defects: firstly, a guide tunnel is provided with a long turning section after entering a main tunnel, and the section consumes a large amount of temporary supports (because the guide tunnel needs to be dismantled in the following excavation process); secondly, steering temporary supports need to be reasonably arranged at the steering positions of the pilot tunnel, and the requirements on the erection and reinforcement technology of the temporary supports are high; thirdly, a three-fork three-dimensional suspension stress area is generated at the part of the pilot tunnel, which is turned into the main tunnel, so that a large-span excavation surface is generated, and the safety is poor;
4. the method for expanding and excavating the similar CRD into the main hole has the following defects: firstly, the transverse support influences the excavation operation, and the mucking difficulty is high; secondly, the construction steps are multiple and complex, and the construction period is long; and the technical requirement is higher.
The methods all have a plurality of problems, one of which is that a large amount of steel support portal frames or arch frames and other temporary supports are used for subsequent expanding excavation of the main tunnel excavator, so that a large amount of steel is consumed, and effective recycling is difficult.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a main aim at advances the above-mentioned not enough of main hole construction method to current inclined shaft, provides a steel frame bearing structure for perpendicular jacking excavation method.
In order to achieve the above object, the utility model adopts the following technical scheme:
a steel frame supporting structure for a vertical jacking excavation method comprises an arch support and a plurality of layers of rectangular supports, wherein the arch support is arranged on the rectangular support at the uppermost layer;
the rectangular bracket is formed by connecting two cross beams and two longitudinal beams, the arched bracket comprises a plurality of groups of parallel arc-shaped beams, and two ends of each arc-shaped beam are respectively fixed on the two cross beams of the topmost rectangular bracket;
the upper and lower layers of rectangular supports are connected through a supporting steel pipe.
Preferably, the top of the arc-shaped beam is also provided with a transverse steel beam which spans all the arc-shaped beams;
preferably, the arch support further comprises a horizontal beam, two ends of the horizontal beam are respectively fixed on the two cross beams of the topmost rectangular support, and the arc beam is fixed on the horizontal beam;
preferably, a diagonal brace is further arranged between the arc-shaped beam and the horizontal beam;
preferably, the cross beam and the longitudinal beam, the horizontal beam and the cross beam, the arc beam and the horizontal beam, and the transverse steel beam and the arc beam are connected through bolts.
Preferably, the cross beams and the longitudinal beams are made of I-shaped steel.
The utility model is suitable for a vertical jacking excavation method that inclined shaft advances positive hole excavates on one side and builds the utility model discloses a steel frame support structure, the vertical jacking excavation method that inclined shaft advances positive hole specifically step as follows:
the first step is as follows: excavating an inclined shaft: when the rectangular pilot tunnel is dug to a certain distance away from the main tunnel side wall I, a rectangular pilot tunnel is dug until reaching a main tunnel side wall II, and the height of the rectangular pilot tunnel is lower than that of the vault of the inclined shaft;
the second step is that: building a cuboid bracket in the rectangular pilot tunnel in the range of the main tunnel: the rectangular support comprises a rectangular support I positioned at the top of the rectangular pilot tunnel and a rectangular support II positioned at the bottom of the rectangular pilot tunnel, the sizes of the two rectangular supports are smaller than the horizontal plane size of the rectangular pilot tunnel, and the two rectangular supports are supported by a jack I to form the rectangular support;
the third step: building an arch support: excavating a section of vault area above the rectangular pilot tunnel, installing an arc-shaped beam when each part of the vault area is excavated, enabling the top of the arc-shaped beam to abut against the top of the vault, fixing two ends of the arc-shaped beam on a cross beam of the rectangular support I until the excavation of the section of vault area and the installation of all the arc-shaped beams are completed, and finally installing transverse steel beams crossing all the arc-shaped beams at the tops of the arc-shaped beams, wherein the arc-shaped beams and the transverse steel beams form an arch support; in the step, in order to prevent the arc-shaped beam from deforming and enhance the strength of the arch-shaped support, the arch-shaped support further comprises a horizontal beam, during installation, the two ends of the horizontal beam are respectively fixed on the two cross beams of the rectangular support I, then the arc-shaped beam is fixed on the horizontal beam, and an inclined strut is further arranged between the arc-shaped beam and the horizontal beam.
The fourth step: continuously excavating the arch crown area upwards, and lifting the rectangular support I and the arch support upwards to the arch crown through the jack I after each section of arch crown area is excavated until the limit of the jack I is reached;
the fifth step: after the limit of the jack I is reached, four jacks II are additionally arranged below the rectangular support I, cushion blocks are arranged on the rectangular support II, the jacks II are arranged on the cushion blocks, and the rectangular support I is supported by the jacks II and the cushion blocks together;
and a sixth step: removing and replacing jacks I at four corners with supporting steel pipes, and installing cross beams and longitudinal beams between the supporting steel pipes to form a second layer of rectangular support I;
the seventh step: continuously excavating the vault area upwards, lifting the jack II until the limit of the jack II is reached, then reinstalling the jack I between the second layer of rectangular support I and the rectangular support II, and supporting the second layer of rectangular support I by the jack I;
eighth step: removing the jack II, continuously excavating the vault area upwards, lifting the jack I until the limit of the jack I is reached, then reinstalling the jack II below the second-layer rectangular support I, and jointly supporting the second-layer rectangular support I by the jack II and the jack I;
the ninth step: supporting steel pipes are arranged at four corners of the second layer of rectangular support I, and a cross beam and a longitudinal beam are arranged between the supporting steel pipes to form a third layer of rectangular support I;
the tenth step: continuously excavating the vault area upwards, lifting the jack II until the limit of the jack II is reached, and removing the jack I from the second-layer rectangular support I and installing the jack I below the third-layer rectangular support I again;
the eleventh step: repeating the steps until the excavation and supporting of the arch crown of the whole main tunnel part are completed, and in the process, the construction of the steel frame supporting structure of the utility model is also completed;
the twelfth step: and expanding and digging the rectangular pilot tunnel part outside the pilot tunnel, and connecting the rectangular pilot tunnel part with the inclined shaft of the initial section.
And finally, excavating the inclined shaft into the main hole and constructing a support truss, and excavating the rest part of the main hole according to a conventional step method.
The utility model discloses following beneficial effect has: use the utility model relates to a supporting structure that inclined shaft advances the excavation of positive hole has saved the use of a large amount of steel shotcrete portal and other interim supports, has reduced the waste, and this steel framed supporting structure easy dismounting, can reuse.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic illustration of a first step of a vertical lift-up excavation process;
FIG. 3 is a schematic illustration of a second step of the vertical lift excavation process;
FIG. 4 is a schematic illustration of a third step of the vertical lift excavation process;
FIG. 5 is a schematic view of a rectangular support and an arched support;
FIG. 6 is a schematic view of a fifth step of the construction method of the present invention;
FIG. 7 is a schematic view of the sixth step of the construction method of the present invention;
FIG. 8 is a schematic view of a seventh step of the construction method of the present invention;
FIG. 9 is a schematic view of the eighth step of the construction method of the present invention;
FIG. 10 is a schematic view of the ninth step of the construction method of the present invention;
FIG. 11 is a schematic view of the tenth step of the construction method of the present invention;
FIG. 12 is a schematic view of the tenth step of the construction method of the present invention;
FIG. 13 is a schematic view of a twelfth step of the construction method of the present invention;
wherein the figures include the following reference numerals: 1. an arched bracket; 11. an arc beam; 12. a horizontal beam; 13. bracing; 14. a transverse steel beam; 2. a rectangular bracket; 21. a cross beam; 22. a stringer; 3. supporting the steel pipe; 4. a deviated well; 41. a rectangular pilot hole; 5. correcting the hole; 51. a side wall I; 52. a side wall II; 6. a rectangular bracket I; 7. a rectangular bracket II; 8. a jack I; 9. a jack II; 10. and a cushion block.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
As shown in fig. 1, the steel frame supporting structure for the vertical jacking excavation method of the utility model comprises an arch support 1 and a plurality of layers of rectangular supports 2, wherein the arch support is arranged on the rectangular support at the uppermost layer; the rectangular support is formed by connecting two cross beams 21 and two longitudinal beams 22, the cross beams and the longitudinal beams are all made of I-steel, the arched support comprises a plurality of groups of parallel arc-shaped beams 11 and horizontal beams 12, two ends of each horizontal beam are respectively fixed on the two cross beams of the topmost rectangular support, and the arc-shaped beams are fixed on the horizontal beams; in order to improve the strength of the arched bracket, inclined struts 13 are arranged between the arc-shaped beams and the horizontal beams, and transverse steel beams 14 are arranged at the tops of the arc-shaped beams and span all the arc-shaped beams. In order to facilitate the disassembly and assembly, the cross beam and the longitudinal beam, the horizontal beam and the cross beam, the arc beam and the horizontal beam and the transverse steel beam and the arc beam are connected through bolts.
The upper and lower layers of rectangular supports are connected through a support steel pipe 3.
The utility model is suitable for a vertical jacking excavation method that inclined shaft advances positive hole builds when excavating the utility model discloses a steel frame support structure, the vertical jacking excavation method that inclined shaft advances positive hole specifically step as follows:
the first step is as follows: excavating an inclined shaft 4: when the side wall I51 of the main tunnel 5 is dug to a certain distance, a rectangular pilot tunnel 41 is dug until the side wall II 52 of the main tunnel is dug, and the height of the rectangular pilot tunnel is lower than that of the vault of the inclined shaft; as shown in fig. 2.
The second step is that: building a cuboid bracket in the rectangular pilot tunnel in the range of the main tunnel: the rectangular support comprises a rectangular support (named as a rectangular support I6) positioned at the top of the rectangular pilot tunnel and a rectangular support (named as a rectangular support II 7) positioned at the bottom of the rectangular pilot tunnel, the sizes of the two rectangular supports are smaller than the horizontal plane size of the rectangular pilot tunnel, and the two rectangular supports are supported by a jack I8 to form the rectangular support; as shown in fig. 3.
The third step: building an arch support: excavating a section of vault area above the rectangular pilot tunnel, installing an arc-shaped beam when each part of the vault area is excavated, enabling the top of the arc-shaped beam to abut against the top of the vault, fixing two ends of the arc-shaped beam on a cross beam of the rectangular support I until the excavation of the section of vault area and the installation of all the arc-shaped beams are completed, and finally installing transverse steel beams crossing all the arc-shaped beams at the tops of the arc-shaped beams, wherein the arc-shaped beams and the transverse steel beams form an arch support; in the step, in order to prevent the arc-shaped beam from deforming and enhance the strength of the arch-shaped support, the arch-shaped support further comprises a horizontal beam, during installation, two ends of the horizontal beam are respectively fixed on two cross beams of the rectangular support I, then the arc-shaped beam is fixed on the horizontal beam, and an inclined strut 13 is further arranged between the arc-shaped beam and the horizontal beam. As shown in fig. 4.
The fourth step: continuously excavating the arch crown area upwards, and lifting the rectangular support I and the arch support upwards to the arch crown through the jack I after each section of arch crown area is excavated until the limit of the jack I is reached; as shown in fig. 5.
The fifth step: after the limit of the jack I8 is reached, four jacks II 9 are additionally arranged below the rectangular support I, a cushion block 10 is arranged on the rectangular support II, the jack II is arranged on the cushion block, and the rectangular support I is supported by the jack II and the cushion block together; as shown in fig. 6.
And a sixth step: removing and replacing jacks I at four corners with supporting steel pipes, and installing cross beams and longitudinal beams between the supporting steel pipes to form a second layer of rectangular support I; as shown in fig. 7.
The seventh step: continuously excavating the vault area upwards, lifting the jack II until the limit of the jack II is reached, then reinstalling the jack I between the second layer of rectangular support I and the rectangular support II, and supporting the second layer of rectangular support I by the jack I; as shown in fig. 8.
Eighth step: removing the jack II, continuously excavating the vault area upwards, lifting the jack I until the limit of the jack I is reached, then reinstalling the jack II below the second-layer rectangular support I, and jointly supporting the second-layer rectangular support I by the jack II and the jack I; as shown in fig. 9.
The ninth step: supporting steel pipes are arranged at four corners of the second layer of rectangular support I, and a cross beam and a longitudinal beam are arranged between the supporting steel pipes to form a third layer of rectangular support I; as shown in fig. 10.
The tenth step: continuously excavating the vault area upwards, lifting the jack II until the limit of the jack II is reached, and removing the jack I from the second-layer rectangular support I and installing the jack I below the third-layer rectangular support I again; as shown in fig. 11.
The eleventh step: repeating the steps until the excavation and supporting of the arch crown of the whole main tunnel part are completed, and in the process, the construction of the steel frame supporting structure of the utility model is also completed; as shown in fig. 12.
The twelfth step: and expanding and digging the rectangular pilot tunnel part outside the pilot tunnel, and connecting the rectangular pilot tunnel part with the inclined shaft of the initial section. As shown in fig. 13.
The inclined shaft has been accomplished up to this point and has advanced the excavation of main hole and the utility model discloses a steel frame support structure build, follow-up according to conventional step method excavate the remaining part of main hole can.
In the description of the present invention, it should be noted that the terms "front end", "rear end", "left and right", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "communicating" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; they may be mechanically coupled, directly coupled, indirectly coupled through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
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 (6)
1. A steel frame supporting structure for a vertical jacking excavation method is characterized in that,
the device comprises an arch support (1) and a plurality of layers of rectangular supports (2), wherein the arch support (1) is arranged on the rectangular support (2) at the uppermost layer;
the rectangular support (2) is formed by connecting two cross beams (21) and two longitudinal beams (22), the arched support (1) comprises a plurality of groups of parallel arc-shaped beams (11), and two ends of each arc-shaped beam (11) are respectively fixed on the two cross beams (21) of the topmost rectangular support;
the upper and lower layers of rectangular supports (2) are connected through a supporting steel pipe (3).
2. A steel frame support structure for vertical lift excavation according to claim 1, wherein the top of the arc beams (11) is further provided with transverse steel beams (14), the transverse steel beams (14) spanning all of the arc beams (11).
3. A steel frame support structure for vertical jacking excavation according to claim 1, wherein the arched bracket (1) further comprises a horizontal beam (12), both ends of the horizontal beam (12) are fixed to two cross beams (21) of the topmost rectangular bracket (2), respectively, and the arched beam (11) is fixed to the horizontal beam (12).
4. A steel frame support structure for vertical lift excavation according to claim 3, wherein diagonal braces (13) are provided between the arc beams (11) and the horizontal beams (12).
5. A steel frame support structure for vertical jacking excavation according to claim 3, wherein the horizontal beams (12) and the cross beams (21), the curved beams (11) and the horizontal beams (12), and the transverse steel beams (14) and the curved beams (11) are connected by bolts.
6. A steel frame support structure for vertical lift excavation according to claim 1, wherein the cross beams (21) and the longitudinal beams (22) are each formed of i-steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022460188.1U CN213574126U (en) | 2020-10-30 | 2020-10-30 | Steel frame supporting structure for vertical jacking excavation method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022460188.1U CN213574126U (en) | 2020-10-30 | 2020-10-30 | Steel frame supporting structure for vertical jacking excavation method |
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| Publication Number | Publication Date |
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| CN213574126U true CN213574126U (en) | 2021-06-29 |
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| CN202022460188.1U Active CN213574126U (en) | 2020-10-30 | 2020-10-30 | Steel frame supporting structure for vertical jacking excavation method |
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