CN113684863A - Underground three-layer large-span non-column station structure - Google Patents
Underground three-layer large-span non-column station structure Download PDFInfo
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- CN113684863A CN113684863A CN202111109800.3A CN202111109800A CN113684863A CN 113684863 A CN113684863 A CN 113684863A CN 202111109800 A CN202111109800 A CN 202111109800A CN 113684863 A CN113684863 A CN 113684863A
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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
- E02D29/05—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 at least part of the cross-section being constructed in an open excavation or from the ground surface, e.g. assembled in a trench
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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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
- E02D29/04—Making large underground spaces, e.g. for underground plants, e.g. stations of underground railways; Construction or layout thereof
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/10—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against soil pressure or hydraulic pressure
- E02D31/12—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against soil pressure or hydraulic pressure against upward hydraulic pressure
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- Environmental & Geological Engineering (AREA)
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- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
The invention provides an underground three-layer large-span column-free station structure, belonging to the field of urban rail transit and municipal engineering underground structure engineering; the camber with the equal cross-section thickness is arranged on the top plate and the bottom plate, the middle plate is reinforced by the equal-thickness flat plate and the axillary angle, and the side wall adopts the vertical equal-thickness cross-section form, so that the main structure stress system of the open cut three-layer station is not provided with vertical upright columns, structural forms of longitudinal beams of all layers are cancelled, and the camber is successfully applied to actual engineering; the structure of the invention enables the arrangement of equipment facilities in the station to be more flexible, the space in the station to be more fully utilized, and the scale of the station is effectively reduced; under the condition of ensuring the structural safety of the station, the structural stress characteristic is improved, the structural size and arrangement are optimized, additional anti-floating measures of the station are reduced, the construction steps are reduced, the construction quality is ensured, the engineering investment is saved, and the method has better application prospect and popularization value.
Description
Technical Field
The invention belongs to the field of urban rail transit and municipal engineering underground structural engineering, and particularly relates to an underground three-layer large-span column-free station structure.
Background
At present, the underground station structure of urban rail transit is generally in the form of a single-layer multi-span, multi-layer multi-span pillar-containing station and a single-layer single-span pillar-free station. During construction, the open-cut structure scheme is adopted mostly, and the underground cutting or cover cutting scheme is adopted rarely.
The above schemes have practical cases in practical engineering, but have disadvantages:
the single-layer multi-span and multi-layer multi-span pillar station has the advantages that the flexible arrangement of internal equipment facilities of the station is not facilitated due to the existence of the frame pillars, the permeability of the station space is poor, the visual field is blocked, the passenger flow is unchanged, and the space utilization rate of the station platform and the station hall is greatly reduced.
Second, multilayer single-span station is generally used for the platform width less, is less than the double-deck no post island formula station of 9m, and along with rail transit net encrypts and urban pedestrian volume constantly increases, three-layer transfer station quantity constantly increases, and the less double-deck no post island formula station of platform width has been unable to satisfy transfer and the big passenger flow demand gradually.
And thirdly, for a double-layer island-type station without columns, which has a large platform width of about 11m, the structural forms of the dense rib beam, the variable cross-section plate and the prestressed reinforced concrete box beam are commonly used. The inner force of the multi-ribbed beam and variable cross-section plate scheme structure is extremely large, the size of the member is extremely large, and the method is not economical; the construction process of the prestressed reinforced concrete box girder structure is complex, and the underground construction difficulty is very high.
In summary, the existing single-layer multi-span and multi-layer multi-span column vehicle station has the problems that flexible arrangement of internal equipment facilities and full utilization of station space are not facilitated; the double-layer non-column station can not meet the requirements of transfer and large passenger flow gradually, and the condition of large structural stress and uneconomic performance exists. Therefore, research on the stress structure of the underground three-layer large-span post-free station, which can effectively solve the problems, is urgently needed.
Disclosure of Invention
The invention aims to provide an underground three-layer large-span column-free station structure which can effectively solve the problems in the prior art. The upright columns and the longitudinal beams of the middle frame are eliminated in the open-cut underground three-layer station, so that a large-span space is realized, flexible arrangement of equipment facilities in the station is facilitated, the space in the station is fully utilized, the scale of the station is optimized, the land resource occupation is reduced, and the engineering investment is saved; meanwhile, the stress characteristic of the structure is improved, the structure safety is ensured, the construction efficiency is improved, and the construction quality is easy to ensure.
In order to achieve the purpose, the invention provides an underground three-layer large-span column-free station structure. The platform layer C side walls are arranged on two sides of the platform layer C from bottom to top in the foundation pit enclosure structure, and a bottom plate arch and an equipment layer middle plate are arranged between the two platform layer C side walls; upward are equipment layer B side walls arranged on two sides, an equipment layer middle plate arranged between the two equipment layer B side walls and a station hall layer middle plate; upward are the side walls of the station hall layer A arranged on two sides and a top plate arch arranged between the side walls of the two station hall layers A; the upper part of the top plate arch is provided with a first concrete support;
the top plate arch adopts an arch-shaped equal-thickness section; the equipment layer middle plate and the station hall layer middle plate are made of equal-thickness plates, and armpit angles are arranged at two ends of the equipment layer middle plate and the station hall layer middle plate; the bottom plate adopts a fitting inverted arch-shaped equal-thickness section; the side wall of the station layer C, the side wall of the equipment layer B and the side wall of the station hall layer A are vertical sections with equal thickness, so that the stress of the structure is guaranteed, and the construction is convenient.
As a further improvement of the invention, the arch feet at the two ends of the top plate arch are provided with top plate arch foot raising lugs, the anti-floating top beam is arranged above the top plate arch foot raising lugs, the arch feet at the two ends of the bottom plate arch are provided with bottom plate arch foot raising lugs, and the top plate arch foot raising lugs and the bottom plate arch foot raising lugs both tightly push against a foundation pit enclosure structure or a continuous wall. The horizontal thrust of the top plate arch and the bottom plate arch is transmitted, the enclosure structure is reliably ensured to participate in anti-floating, and no horizontal pulling structural member is arranged.
As a further improvement of the invention, the first concrete support is arranged at the top end of the foundation pit maintenance structure without being dismantled and resists the horizontal thrust generated by the top plate arch springing.
As a further improvement of the invention, the middle plate is made of an equal-thickness plate, the two ends of the middle plate are provided with axilla angle measures, the height of the axilla angle is equal to the thickness of the middle plate, and the width of the axilla angle is 3 times of the height, so that the stress and deformation characteristics of the middle plate are improved, and the construction is convenient.
As a further improvement of the invention, an auxiliary entrance is arranged in the station hall layer A, two sides of the middle plate in the station hall layer are connected with auxiliary entrance bottom plates, two sides of the top plate arch are connected with auxiliary entrance top plates, and vertical lintels are respectively arranged in the vertical direction of arch feet at two ends of the top plate arch. The construction of the auxiliary access is completed, the horizontal thrust of the crown plate arch of the station roof during the use period is resisted by the top plate of the auxiliary access, and a horizontal pulling structural part is not arranged.
As a further improvement of the invention, an auxiliary access local thickened top plate is arranged in the horizontal direction of the arch springing of the top plate arch, an auxiliary access local thickened side wall is arranged between the station hall layer A side wall and the foundation pit enclosure structure, and the foundation pit enclosure structure is tightly propped against the foundation pit enclosure structure and is used for resisting the horizontal thrust of the station top plate arch during the auxiliary construction.
Generally, compared with the prior art, the technical scheme of the invention has the following beneficial effects:
1. according to the large-span post-free station structure, the arch camber is arranged on the top plate and the bottom plate, the middle plate is in the form of the equal-thickness flat plate and the auxiliary axillary angle, the vertical upright column is not arranged in the stress system of the main structure of the open-cut three-layer station, a large-span space is formed, equipment facilities in the station are more flexibly arranged, the space in the station is fully utilized, the scale of the station is effectively reduced, and the space sense of the station is further improved.
2. The large-span column-free station structure has clearer and more definite force transmission paths of the top plate, the middle plate and the bottom plate, and the top plate, the bottom plate arch structure and the middle plate adopt equal-thickness flat plates and axillary angle structures, so that the stress characteristic of the structure is greatly improved, the size of a component is reduced, the engineering investment of a main structure is saved, and the adverse effect of large-volume concrete construction is reduced; vertical columns in the middle and top, middle and bottom longitudinal beams are eliminated, so that the number of components is reduced, and the construction progress is accelerated.
3. According to the large-span column-free station structure, the bottom plate adopts an arch-arching form, so that the calculation depth of the foundation pit is reduced, the length of the foundation pit enclosure structure is shortened, the excavation risk of the foundation pit is reduced, and the engineering investment of the foundation pit is saved.
4. According to the large-span post-free station structure, the arch feet at two ends of the top plate arch are provided with the cantilever lugs and tightly push the enclosure structure, the first concrete support of the foundation pit engineering is not removed, the enclosure structure can effectively resist the horizontal thrust generated by the arch feet of the top plate, and the stress of the top plate arch structure is reduced; meanwhile, the top plate lifting lugs are arranged to enable the foundation pit support structure to participate in the anti-floating of the station, the stress of the anti-floating pressure top beam is improved, additional anti-floating measures of the station are cancelled, such as the arrangement of anti-floating piles, and the investment of the anti-floating measures is saved.
5. According to the large-span post-free station structure, the bottom plate arch foot and the side wall bottom support are provided with the bottom plate raising lug, so that the horizontal thrust of the bottom plate arch is effectively transmitted to the rock-soil layers on two sides, and meanwhile, the problems of large stress and dense reinforcing steel bars of the side wall bottom support are effectively solved.
6. According to the large-span post-free station structure, the access side wall and the top plate are locally thickened at the access interface, so that the problem of horizontal thrust of the top plate arch springing during construction and use is effectively solved, a horizontal pulling structural part is not needed, the use space of the top plate arch is increased, and the construction efficiency is improved.
Drawings
The accompanying drawings are added to provide a clear, more detailed, and more detailed description of the basic contents, basic features, and basic connotations of this patent.
FIG. 1 is a schematic structural diagram of a three-layer pillarless station of a subway of the present invention;
FIG. 2 is a schematic structural diagram of an entrance/exit interface of a three-layer pillarless station of the subway of the present invention;
FIG. 3 is a plan view of an entrance and an exit at an entrance and exit interface of a subway three-layer pillarless station according to the present invention;
FIG. 4 is a sectional view of an entrance/exit A-A at an entrance/exit interface of a subway three-layer pillarless station according to the present invention;
FIG. 5 is a B-B sectional view of an entrance/exit at an entrance/exit interface of a subway three-layer pillarless station according to the present invention;
FIG. 6 is a C-C section view of an entrance and an exit at an entrance and exit interface of a subway three-layer pillarless station according to the present invention;
reference numerals: the building comprises a station hall layer A, an equipment layer B, a station platform layer C, a foundation pit enclosure structure 10, a first concrete support 11, an anti-floating top beam 12, a bottom plate arch 21, an equipment layer middle plate 22, a station hall layer middle plate 23, a top plate arch 24, a station platform layer C side wall 25, an equipment layer B side wall 26, a station hall layer A side wall 27, a bottom plate arch foot lifting lug 28, a top plate arch foot lifting lug 29, a vertical lintel 30, an auxiliary access floor 31, an auxiliary access side wall 32, an auxiliary access roof 33, an auxiliary access local thickened side wall 34, an auxiliary access local thickened roof 35 and an auxiliary access foundation pit enclosure structure 36.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
The underground large-span three-layer pillarless station in the preferred embodiment of the invention comprises a station hall layer A, an equipment layer B and a station platform layer C. Referring to fig. 1, in a foundation pit enclosure structure 10, from bottom to top, a side wall 25 of a platform layer C, a bottom plate arch foot raising lug 28, a bottom plate arch 21 and an equipment layer middle plate 22 are respectively arranged on two sides of the platform layer C, and the bottom plate arch 21 and the equipment layer middle plate 22 are arranged between the side walls 25 of the two platform layers C; upward are equipment layer B side walls 26 arranged at two sides, an equipment layer middle plate 22 arranged between the two equipment layer B side walls 26 and a station hall layer middle plate 23; upward are the station hall layer A side walls 27 arranged on two sides, the top plate arch 24 arranged between the two station hall layer A side walls 27 and the top plate arch foot lifting lugs 29 on two sides, wherein the top plate arch foot lifting lugs 29 are tightly propped against the foundation pit enclosure structure, and the anti-floating top beam 12 is arranged above the top plate arch foot lifting lugs 29; the upper part of the roof arch 24 is the first concrete support 11 of the foundation pit and is not dismantled.
Particularly, the station roof adopts the equal thickness section structure of arch, and the station medium plate adopts the equal thickness plate structure to set up axillary angle thickening enhancement measure at the medium plate both ends, the bottom plate adopts the equal thickness section structure of arch, the inverted arch form, and the side wall adopts vertical equal thickness section structure.
In the embodiment shown in fig. 2, the components of the equipment level B and the station level C are the same as those of the embodiment of fig. 1. The two sides of the station hall layer middle plate 23 are connected with the auxiliary inlet and outlet bottom plates 31; vertical lintels 30 are respectively arranged in the vertical direction of arch springing at two ends of the top plate arch 24, an auxiliary access local thickened top plate 35 is arranged in the horizontal direction of the arch springing, and the auxiliary access local thickened top plate 35 tightly props up the foundation pit enclosure structure 10, so that the vertical force and the horizontal thrust of the arch springing of the top plate arch 24 can be conveniently transferred.
In the embodiment shown in fig. 3-6, the auxiliary access opening local thickened side wall 34 is arranged at the section between the side wall 27 of the station hall layer a and the foundation pit enclosure 10, and is tightly pressed against the foundation pit enclosure 10. Thus, the horizontal pushing force of the top plate arch 24 of the doorway interface section can be transmitted to the auxiliary doorway foundation pit support structure 36 through the auxiliary doorway locally thickened top plate 35, the auxiliary doorway locally thickened side wall 34 and the foundation pit support structure 10, and no additional horizontal pull rod member is required to be arranged at the lower part of the top plate arch 24.
It should be understood that the above-described embodiments are merely illustrative of the present invention and are not intended to limit the present invention, and any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (6)
1. The underground three-layer large-span post-free station structure is characterized by comprising a station hall layer A, an equipment layer B, a station layer C, a foundation pit enclosing structure (10) and a first concrete support (11), wherein the foundation pit enclosing structure (10) comprises station layer C side walls (25) which are arranged on two sides from bottom to top, and a bottom plate arch (21) and an equipment layer middle plate (22) which are arranged between the two station layer C side walls (25); upward are equipment layer B side walls (26) arranged at two sides, an equipment layer middle plate (22) arranged between the two equipment layer B side walls (26) and a station hall layer middle plate (23); upward are the standing hall layer A side walls (27) arranged at two sides and a top plate arch (24) arranged between the two standing hall layer A side walls (27); the upper part of the roof arch (24) is provided with a first concrete support (11);
the roof arch (24) adopts an arch-shaped equal-thickness section; the equipment layer middle plate (22) and the station hall layer middle plate (23) are equal thick plates; the bottom plate (21) adopts a fitted inverted arch-shaped equal-thickness section; the side wall (25) of the station layer C, the side wall (26) of the equipment layer B and the side wall (27) of the station hall layer A are vertical sections with equal thickness, and the width between the two side walls is 8-14 m.
2. The underground three-layer large-span post-free station structure as claimed in claim 1, wherein the top arch (24) is provided with top arch springing ears (29) at the two ends, the anti-floating top beam (12) is arranged above the top arch springing ears (29), the bottom arch (21) is provided with bottom arch springing ears (28) at the two ends, and the top arch springing ears (29) and the bottom arch springing ears (28) are both tightly against the foundation pit enclosure structure (10).
3. The underground three-story large-span pillarless station structure of claim 1, wherein the first concrete support (11) is installed at the top end of the foundation pit maintenance structure (10) without being dismantled.
4. The underground three-layer large-span pillarless station structure as claimed in claim 1, wherein the equipment layer middle plate (22) and the station hall layer middle plate (23) are provided with armpit corners at both ends, the height of the armpit corners is equal to the thickness of the plate, and the width of the armpit corners is 3 times of the height.
5. The underground three-storey large-span pillarless station structure according to any one of claims 1 to 4, wherein an auxiliary access is provided in the station hall layer A, both sides of the station hall layer middle plate (23) are connected with auxiliary access bottom plates (31), and vertical lintels (30) are respectively provided in the vertical direction of the arch feet at both ends of the top plate arch (24).
6. The underground three-layer large-span pillarless station structure as claimed in claim 5, wherein the horizontal direction of the arch foot of the top plate arch (24) is provided with an auxiliary access local thickening top plate (35), and an auxiliary access local thickening side wall (34) is arranged between the station hall layer A side wall (27) and the foundation pit enclosure structure (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111109800.3A CN113684863A (en) | 2021-09-23 | 2021-09-23 | Underground three-layer large-span non-column station structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111109800.3A CN113684863A (en) | 2021-09-23 | 2021-09-23 | Underground three-layer large-span non-column station structure |
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| CN113684863A true CN113684863A (en) | 2021-11-23 |
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| CN202111109800.3A Pending CN113684863A (en) | 2021-09-23 | 2021-09-23 | Underground three-layer large-span non-column station structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115233728A (en) * | 2022-07-19 | 2022-10-25 | 广州地铁建设管理有限公司 | Subway station |
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2021
- 2021-09-23 CN CN202111109800.3A patent/CN113684863A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115233728A (en) * | 2022-07-19 | 2022-10-25 | 广州地铁建设管理有限公司 | Subway station |
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