CN111379438A - Vertical temporary supporting system for underground structure and using method - Google Patents
Vertical temporary supporting system for underground structure and using method Download PDFInfo
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- CN111379438A CN111379438A CN202010161267.4A CN202010161267A CN111379438A CN 111379438 A CN111379438 A CN 111379438A CN 202010161267 A CN202010161267 A CN 202010161267A CN 111379438 A CN111379438 A CN 111379438A
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- axial force
- steel pipe
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- force servo
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G25/00—Shores or struts; Chocks
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/0007—Base structures; Cellars
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G25/00—Shores or struts; Chocks
- E04G25/02—Shores or struts; Chocks non-telescopic
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Abstract
The invention provides a vertical temporary supporting system of an underground structure and a using method thereof, wherein the temporary supporting system comprises a circular steel pipe support, an axial force servo system and embedded steel plates, the embedded steel plates are embedded in a bottom plate, middle plates and a top plate of the underground structure, the embedded steel plates at different layers are positioned on the same plumb line, the circular steel pipe support is propped between the embedded steel plates at different layers on the same plumb line and is welded with the embedded steel plates, the axial force servo system is arranged on the middle plate at the minus layer, the circular steel pipe support at the minus layer is propped between the top plate and the axial force servo system, and the circular steel pipe support is connected with the axial force servo system through a flange. The invention solves the problem of vertical stress of the underground structure when the structural system can not be formed at one time, and simultaneously realizes synchronous equal proportion unloading of the vertical temporary supports through the axial force servo system, thereby greatly reducing trial calculation work during support dismantling, greatly improving the work efficiency of support dismantling, and reducing the risk of support failure and collapse.
Description
Technical Field
The invention relates to the field of underground structure engineering, in particular to a vertical temporary supporting system of an underground structure and a using method thereof.
Background
In the urban rail transit underground station construction process, when the underground station is located under the busy trunk road, because pressure or other reasons of traffic dismissal, the underground station structure system can not one shot forming, need carry out leading edge dismissal traffic, be about to traffic dismissal to first phase structural range outside, then construct first phase structure earlier, carry out to do and disconge the traffic to first phase structure top after accomplishing, then carry out second phase structure, until finally accomplishing underground station. In this process, even the situation that the underground structure main beam structure cannot be formed at one time due to the influence of temporary defibering of the bridge pile foundation occurs. Under this condition, the ability of bearing vertical load of underground structure greatly reduced, and structural component hardly satisfies bearing capacity and normal use's requirement. At this time, a temporary vertical support needs to be arranged to assist the unformed main structure to bear the vertical load. Usually, when dismantling interim vertical braces, the load that the support that demolishs earlier bore can shift to near support, for the support that prevents to demolish after inefficacy collapses, needs to carry out a large amount of trial works and obtains the order of demolising the support, and the support is demolishd the cycle length moreover, and the risk is high. Therefore, the development of a vertical temporary supporting system for an underground structure and a using method thereof are problems to be solved urgently.
Disclosure of Invention
In view of the above, the invention aims to provide a vertical temporary support system for an underground structure and a use method thereof, which ensure the safety of the underground structure by setting a vertical temporary support to bear vertical load under the condition that an underground structure system cannot be formed at one time, and simultaneously reduce the period, risk and trial work load of dismantling the vertical temporary support.
In order to solve the technical problems, the invention adopts the technical scheme that:
the utility model provides a vertical interim braced system of underground structure, includes that circular steel pipe supports, axial force servo and pre-buried steel sheet, pre-buried steel sheet is buried underground in bottom plate, each layer medium plate and the roof of underground structure for the location that circular steel pipe supported, the pre-buried steel sheet on different layers is located same plumb line, circular steel pipe supports to prop up between the pre-buried steel sheet on same plumb line different layers.
Furthermore, an axial force servo system is arranged on the middle plate of the negative layer, the round steel pipe support of the negative layer is supported between the top plate and the axial force servo system, and the round steel pipe support is connected with the axial force servo system through a flange.
Furthermore, a plurality of embedded steel plates are arranged at the relative positions in the bottom plate, the middle plate of each layer and the top plate.
Furthermore, when the height of the round steel pipe support is too large, the round steel pipe supports can be connected through the transverse connecting rods, so that the stability is improved.
Further, the round steel pipe support is welded and fixed with the embedded steel plate.
A use method of the vertical temporary supporting system adopting the underground structure comprises the following steps:
① arranging embedded steel plates according to the positioning of the vertical round steel pipe support, pouring a first-stage concrete structure bottom plate, and erecting the round steel pipe support, a scaffold and a template after the bottom plate reaches the design strength;
② pouring a first-stage structural middle plate, arranging embedded steel plates according to the positioning of vertical round steel pipe supports, erecting an axial force servo system and a round steel pipe support according to the designed positioning after the strength of middle plate concrete meets the design requirement, erecting a scaffold and a top plate template, and setting the axial force servo system to be in a locking state;
③ pouring a first-stage structural roof, and removing the scaffold and the template after the design strength is reached;
④ backfilling the top plate of the first-stage structure to cover soil and recover road traffic;
⑤ finishing the second stage structure according to the conventional construction method, setting the axial force servo system to the actual axial force value after the structure system is integrally formed, and removing the locking state;
⑥ synchronous equal proportion unloading is realized by the axial force servo system, and finally the stress conversion of the structural system is completed.
Compared with the prior art, the vertical temporary supporting system for the underground structure and the using method have the following advantages: the invention solves the problem of vertical stress of the underground structure when the structural system can not be formed at one time, and simultaneously realizes synchronous equal proportion unloading of the vertical temporary supports through the axial force servo system, thereby greatly reducing trial calculation work during support dismantling, greatly improving the work efficiency of support dismantling, and reducing the risk of support failure and collapse.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view of node 1 of FIG. 1;
fig. 3 is an enlarged view of node 2 in fig. 1.
Description of reference numerals:
1. supporting by a round steel pipe; 2. pre-burying a steel plate; 3. a transverse tie bar; 4. an axial force servo system; 5. a top plate; 6. carrying out loading on a middle plate; 7. carrying out secondary layer middle plate; 8. a base plate.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. 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," "second," etc. 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.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1-3, a vertical temporary support system for an underground structure comprises a circular steel pipe support 1, an axial force servo system 4, a transverse tie rod 3 and pre-embedded steel plates 2, wherein the pre-embedded steel plates 2 are embedded in a bottom plate, middle plates and a top plate of the underground structure and used for positioning the circular steel pipe support, the pre-embedded steel plates 2 on different layers are located on the same plumb line, and the circular steel pipe support 1 is propped between the pre-embedded steel plates 2 on different layers on the same plumb line and welded with the pre-embedded steel plates 2. An axial force servo system is arranged on the middle plate of the negative layer, the round steel pipe support 1 of the negative layer is supported between the top plate and the axial force servo system 4, and the round steel pipe support 1 is connected with the axial force servo system 4 through a flange. When the height of the round steel pipe supports 1 is too large, the round steel pipe supports 1 can be connected through the transverse tie rods 3 to improve stability.
An underground junction station of a certain urban rail transit is positioned at a crossroad of two busy roads, the traffic is required to be blocked because the traffic cannot be interrupted, and the traffic is dredged through construction in two stages, so that an underground station structure system cannot be formed at one time. The main beam of the first-stage engineering of the underground station conflicts with a relief bridge pile, and the main beam of the underground station needs to be constructed after the relief bridge is removed before the viaduct is reconstructed, so that a structural system can not be formed once. In order to ensure the structure safety, a first-stage project needs to arrange a vertical temporary supporting system around the span and the adjacent span of the two-stage construction interface and the beam which conflicts with the loosened bridge pile. The construction method specifically comprises the following steps:
① setting embedded steel plates according to the positioning of the vertical round steel pipe support 1 at the two-stage construction interface when the span and the adjacent span and around the beam colliding with the bridge pile are dredged, pouring a first-stage concrete structure bottom plate, erecting the round steel pipe support 1 and a scaffold and a template after the bottom plate reaches the design strength, and welding and fixing the round steel pipe support 1 and the embedded steel plates 2.
② pour the first-stage structural middle plate and set up pre-buried steel plate 2 according to the location that vertical circular steel pipe supported, after the middle plate concrete strength reached the design requirement, erect axial force servo 4 and circular steel pipe support 1 according to the design location to set up scaffold frame and roof template, axial force servo 4 sets for the lock-up state.
③ casting the first stage structural roof 5, and removing the scaffold and the template after reaching the design strength.
④ backfilling the top plate of the first-stage structure to cover soil and recover road traffic;
⑤ finishing the second stage structure according to the conventional construction method, after the structure system is integrally formed, setting the axial force servo system 4 to the actual axial force value, and removing the locking state;
⑥, synchronous equal proportion unloading is realized through the axial force servo system 4, and finally the stress conversion of the structural system is completed.
The vertical round steel pipe support is used for bearing the vertical load of the structure when an underground structure system is not completely formed, and the internal force of a beam column structure is reduced. The axial force servo system has a large displacement range, has an axial force automatic compensation function, and can also realize synchronous equal-proportion unloading. The invention realizes the transmission of the vertical load of the underground structure under the condition that the structural system can not be formed at one time, the synchronous equal proportion unloading of the vertical supports avoids the risk of support failure caused by the sudden increase of the local support axial force in the batch dismantling process of the supports, and meanwhile, the support erection and the disassembly are simple, and the construction period is saved.
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 (6)
1. The utility model provides a vertical interim braced system of underground structure which characterized in that: the underground structure comprises a round steel pipe support, an axial force servo system and embedded steel plates, wherein the embedded steel plates are embedded in a bottom plate, middle plates and a top plate of an underground structure, the embedded steel plates on different layers are located on the same plumb line, and the round steel pipe support is supported and supported between the embedded steel plates on different layers on the same plumb line.
2. An underground structural vertical temporary support system according to claim 1, wherein: and an axial force servo system is arranged on the middle plate of the negative layer, the round steel pipe support of the negative layer is supported between the top plate and the axial force servo system, and the round steel pipe support is connected with the axial force servo system through a flange.
3. An underground structural vertical temporary support system according to claim 1, wherein: and the circular steel pipe support is welded and fixed with the embedded steel plate.
4. An underground vertical temporary support system according to claim 1 or 2, wherein: and a plurality of embedded steel plates are arranged at the relative positions in the bottom plate, the middle plate of each layer and the top plate.
5. An underground structural vertical temporary support system according to claim 3, wherein: the circular steel pipe supports are connected through a transverse connecting rod to improve stability.
6. Use of the vertical temporary support system for underground structures according to any one of claims 1 to 5, characterized in that it comprises the following steps:
① arranging embedded steel plates according to the positioning of the vertical round steel pipe support, pouring a first-stage concrete structure bottom plate, and erecting the round steel pipe support, a scaffold and a template after the bottom plate reaches the design strength;
② pouring a first-stage structural middle plate, arranging embedded steel plates according to the positioning of vertical round steel pipe supports, erecting an axial force servo system and a round steel pipe support after the strength of middle plate concrete meets the design requirement, erecting a scaffold and a top plate template, and setting the axial force servo system to be in a locking state;
③ pouring a first-stage structural roof, and removing the scaffold and the template after the design strength is reached;
④ backfilling the top plate of the first-stage structure to cover soil and recover road traffic;
⑤ finishing the second stage structure according to the conventional construction method, setting the axial force servo system to the actual axial force value after the structure system is integrally formed, and removing the locking state;
⑥ synchronous equal proportion unloading is realized by the axial force servo system, and finally the stress conversion of the structural system is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010161267.4A CN111379438A (en) | 2020-03-10 | 2020-03-10 | Vertical temporary supporting system for underground structure and using method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010161267.4A CN111379438A (en) | 2020-03-10 | 2020-03-10 | Vertical temporary supporting system for underground structure and using method |
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| CN111379438A true CN111379438A (en) | 2020-07-07 |
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| CN202010161267.4A Pending CN111379438A (en) | 2020-03-10 | 2020-03-10 | Vertical temporary supporting system for underground structure and using method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113982041A (en) * | 2021-12-29 | 2022-01-28 | 中国铁路设计集团有限公司 | Method for reconstructing side wall of underground operation station by punching |
| CN114412228A (en) * | 2022-03-30 | 2022-04-29 | 中国铁路设计集团有限公司 | Underpinning system for stress conversion of existing structure and control method thereof |
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| CN105201219A (en) * | 2015-10-16 | 2015-12-30 | 中建三局集团有限公司 | Structure synchronous unloading device and construction method thereof |
| CN105649197A (en) * | 2016-01-31 | 2016-06-08 | 江苏扬建集团有限公司 | Post-pouring belt construction method conducted under green-landscape-first condition |
| CN108729451A (en) * | 2018-06-07 | 2018-11-02 | 中国建筑第八工程局有限公司 | The combined support system and its construction method of foundation pit |
| CN110067260A (en) * | 2019-04-11 | 2019-07-30 | 牛斌 | Sheltered reverse excavation station steel pipe column tilts processing method |
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2020
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Patent Citations (5)
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| CN105113542A (en) * | 2015-09-21 | 2015-12-02 | 中铁上海工程局有限公司 | Cantilever system and method for underground station construction |
| CN105201219A (en) * | 2015-10-16 | 2015-12-30 | 中建三局集团有限公司 | Structure synchronous unloading device and construction method thereof |
| CN105649197A (en) * | 2016-01-31 | 2016-06-08 | 江苏扬建集团有限公司 | Post-pouring belt construction method conducted under green-landscape-first condition |
| CN108729451A (en) * | 2018-06-07 | 2018-11-02 | 中国建筑第八工程局有限公司 | The combined support system and its construction method of foundation pit |
| CN110067260A (en) * | 2019-04-11 | 2019-07-30 | 牛斌 | Sheltered reverse excavation station steel pipe column tilts processing method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113982041A (en) * | 2021-12-29 | 2022-01-28 | 中国铁路设计集团有限公司 | Method for reconstructing side wall of underground operation station by punching |
| CN114412228A (en) * | 2022-03-30 | 2022-04-29 | 中国铁路设计集团有限公司 | Underpinning system for stress conversion of existing structure and control method thereof |
| CN114412228B (en) * | 2022-03-30 | 2022-07-15 | 中国铁路设计集团有限公司 | Underpinning system for stress conversion of existing structure and control method thereof |
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