CN116791670A - Pile box ribbed underground combined structure and construction method thereof - Google Patents
Pile box ribbed underground combined structure and construction method thereof Download PDFInfo
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- CN116791670A CN116791670A CN202310558991.4A CN202310558991A CN116791670A CN 116791670 A CN116791670 A CN 116791670A CN 202310558991 A CN202310558991 A CN 202310558991A CN 116791670 A CN116791670 A CN 116791670A
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Abstract
本发明涉及一种桩箱加肋地下组合结构及其施工方法。现有明挖箱形隧道结构在承受上部超大荷载时，存在隧道结构受力大、内部应力分布不均匀、整体性差、结构变形大、沉降量大、安全性差的问题。本结构包括箱型结构和长短桩；箱型结构包括顶板、侧墙和底板，顶板设置有顶板纵梁，底板设置有底板纵梁，顶板、侧墙和底板设置有横向环梁；顶板纵梁、底板纵梁和横向环梁组成加肋纵横向暗梁；长短桩位于箱型结构下方并支撑箱型结构。本发明在隧道的箱型结构中增加了加肋纵横向暗梁以及底部长短桩的组合结构，工程量小，受力体系明确，并明显提升了结构刚度和稳定性，减小了结构的变形沉降，提高了结构安全性。
The invention relates to a pile box ribbed underground composite structure and a construction method thereof. When the existing cut-and-cover box-shaped tunnel structure bears an extremely large load from the upper part, there are problems such as large stress on the tunnel structure, uneven internal stress distribution, poor integrity, large structural deformation, large settlement, and poor safety. This structure includes a box structure and long and short piles; the box structure includes a top plate, side walls and a bottom plate. The top plate is equipped with a roof longitudinal beam, and the bottom plate is equipped with a bottom plate longitudinal beam. The top plate, side walls and bottom plate are equipped with transverse ring beams; the top plate longitudinal beam , bottom plate longitudinal beams and transverse ring beams form ribbed longitudinal and transverse concealed beams; long and short piles are located under the box structure and support the box structure. The present invention adds a combined structure of ribbed vertical and horizontal concealed beams and long and short piles at the bottom to the box-shaped structure of the tunnel. The amount of work is small, the stress system is clear, the structural stiffness and stability are significantly improved, and the deformation of the structure is reduced. settlement, improving structural safety.
Description
Technical Field
The invention relates to the technical field of open cut tunnel engineering construction, in particular to a ribbed underground combined structure of a pile box and a construction method thereof.
Background
Along with the gradual increase of the number of large transportation hubs, the engineering practice of complex co-configured underground structures is also gradually increased, the common stress of tunnels and an upper oversized structure conversion system is also gradually increased, the structure systems are easy to cause uneven stress of the tunnels, and if the structure systems are positioned in soft soil water-rich stratum, the structure is more easy to generate larger sedimentation deformation.
Unlike conventional open cut tunnel box structure, when being located soft soil water-rich stratum and bearing the super-large load of upper portion, the tunnel structure atress is big, and internal stress distributes unevenly, and current open cut box tunnel structure is difficult to bear the super-large load of upper portion, and structural deformation is big, and the settlement volume is big, therefore need be for bearing the construction structure of the super-large load of upper portion's box open cut tunnel structure design can solve above-mentioned technical problem.
Disclosure of Invention
The invention aims to provide a ribbed underground combined structure of a pile box and a construction method thereof, which are used for solving the problems of large stress, uneven internal stress distribution, poor integrity, large structural deformation, large settlement and poor safety of the tunnel structure when the existing open cut box-shaped tunnel structure bears an oversized load on the upper part.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the pile box ribbed underground combined structure comprises a box structure and long and short piles;
the box structure comprises a top plate, side walls and a bottom plate, wherein the top plate is provided with a top plate longitudinal beam, the bottom plate is provided with a bottom plate longitudinal beam, and the top plate, the side walls and the bottom plate are provided with transverse ring beams; the top plate longitudinal beam, the bottom plate longitudinal beam and the transverse ring beam form a ribbed longitudinal and transverse hidden beam;
the long and short piles are located below the box-shaped structure and support the box-shaped structure.
Further, the roof longitudinal beam corresponds from top to bottom with the bottom plate longitudinal beam, the roof longitudinal beam with be provided with vertical intermediate wall between the bottom plate longitudinal beam.
Further, a top plate corner longitudinal beam is arranged at the joint of the top plate and the side wall.
Further, a bottom plate corner longitudinal beam is arranged at the joint of the bottom plate and the side wall.
Further, the bottom surfaces of the transverse ring beams between the top plate corner stringers and the adjacent top plate stringers are arched;
the bottom surfaces of the transverse ring beams between two transversely adjacent roof longitudinal beams are arched.
Further, an upper structure conversion beam is arranged above the box structure, an upper structure support is arranged at the bottom of the upper structure conversion beam, and the upper structure support is supported at the top of the roof longitudinal beam.
Further, upper structure pile foundations are arranged on two lateral sides of the box-shaped structure, and an upper structure foundation bearing platform is arranged at the top of each upper structure pile foundation;
the bottom of two ends of a transverse line of the upper structure conversion beam is provided with upper structure supports, and the upper structure supports at two transverse ends are supported at the top of the upper structure foundation bearing platform.
Further, the upper structure support and the upper structure conversion beam are integrally cast.
Further, the long piles and the short piles below the box-shaped structure are symmetrically arranged in length.
In another aspect, there is provided a method of constructing a ribbed subterranean composite structure of a pile box as described, the method comprising:
the method comprises the steps of constructing an open cut foundation pit supporting structure, synchronously constructing long piles and reserving connecting steel bars at the tops of the long piles;
excavating a foundation pit downwards in layers until the elevation of the bottom of the box structure is reached, exposing connecting steel bars reserved at the top of the long piles and the short piles, and performing waterproof and cushion layer construction on the bottom plate;
binding bottom plate steel bars of the box structure, reliably anchoring the bottom plate steel bars and connecting steel bars reserved at the tops of the long piles and the short piles, arranging hidden beam steel bars at the ribbed longitudinal and transverse hidden beams, and casting concrete by standing a mould to form a combined structure of the ribbed longitudinal and transverse hidden beams and the bottom plate;
and arranging side wall steel bars and top plate steel bars of the box structure in a layered and segmented manner, arranging hidden beam steel bars at the position of the ribbed longitudinal and transverse hidden beam, pouring concrete, and forming a pile box ribbed combined structure together with the ribbed longitudinal and transverse hidden beam and bottom plate combined structure.
Compared with the prior art, the invention has the following beneficial effects:
the combined structure of the ribbed longitudinal and transverse hidden beams and the long and short piles at the bottom is added in the box structure of the tunnel, so that the construction quantity is small, the stress system is clear, the structural rigidity and stability are obviously improved, the deformation and settlement of the structure are reduced, and the structural safety is improved. In addition, the long and short piles provide enough support for the box body structure, so that the integral sedimentation and uneven sedimentation deformation of the tunnel under the condition of the soft soil water-rich stratum are improved, and the integral safety of the structure is improved.
In the structural construction process, the plate thickness of the box structure can be reduced through the arrangement of the ribbed longitudinal and transverse hidden beams, so that the structural engineering quantity is reduced, the structural integrity is improved, and the safety and the reliability are realized.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other embodiments of the drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a structural diagram of embodiment 1 of the present invention.
Fig. 2 is a structural diagram of embodiment 2 of the present invention.
The marks in the figure are as follows:
1-upper structure cross beams, 2-upper structure columns, 3-upper structure conversion beams, 4-upper structure supports, 5-upper structure foundation bearing platforms, 6-upper structure pile foundations, 7-transverse ring beams, 8-roof stringers, 9-intermediate walls, 10-roof corner stringers, 11-floor corner stringers, 12-floor stringers and 13-long short piles.
Detailed Description
In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. The drawings illustrate preferred embodiments of the invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
In the description of this patent, it should be understood that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "longitudinal," "transverse," "top," "bottom," "inner," "outer," and the like indicate an orientation or a positional relationship based on that shown in the drawings, merely for convenience in describing the patent and simplifying the description, and do not indicate or imply that the devices or elements being referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the patent.
In the description of this patent, it should be noted that, unless explicitly stated and limited otherwise, the terms "connected," "disposed," and the like are to be construed broadly and include, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected, disposed. The specific meaning of the terms in this patent will be understood by those of ordinary skill in the art as the case may be.
In the specific embodiment, the line direction is defined as a longitudinal direction, and the direction perpendicular to the line direction is defined as a transverse direction.
As shown in figure 1, the invention provides a ribbed underground combined structure of a pile box, which is an underground space structure which is formed by a box structure, ribbed longitudinal and transverse hidden beams and long and short piles and can bear the oversized load at the upper part. Specifically, the structure includes a box structure and a long and short pile 13.
The box structure comprises a top plate, side walls and a bottom plate, and the cross section of the box structure is rectangular. The roof is provided with roof longeron 8, and the bottom plate is provided with bottom plate longeron 12, and roof, side wall and bottom plate are provided with the horizontal girt 7 of full ring, and the node department of roof and side wall is provided with roof bight longeron 10, and the node department of bottom plate and side wall is provided with bottom plate bight longeron 11, and all longerons and horizontal girt 7 constitute the longitudinal and transverse hidden roof beam of rib.
The roof longitudinal beam 8 corresponds from top to bottom with the bottom plate longitudinal beam 12, is provided with vertical intermediate wall 9 between roof longitudinal beam 8 and the bottom plate longitudinal beam 12, when playing the supporting role, can be used to separate each line space and the platform space that transversely is adjacent. The bottom surfaces of the transverse ring beams 7 between the top plate corner longitudinal beams 10 and the adjacent top plate longitudinal beams 8 are arched, the bottom surfaces of the transverse ring beams 7 between the two transversely adjacent top plate longitudinal beams 8 are arched, and a vault structure is formed at the top of each line space and platform space, so that the bearing capacity can be effectively improved.
The long short piles 13 are positioned below the box structure and support the box structure, and the steel bars in the long short piles 13 are bound with the steel bars at the bottom of the box structure into a whole. As shown in fig. 1 and 2, the long and short piles 13 below the box structure are symmetrically arranged in length, and of course, the length and position of the long and short piles 13 can be further adjusted and changed according to the lateral width of the box structure and specific stratum characteristics.
Fig. 1 shows a construction of embodiment 1 of the present construction in which five longitudinal channels are designed. Fig. 2 shows a structural form of embodiment 2 of the present structure, in which seven longitudinal passages are designed.
The box structure is provided with a ribbed longitudinal and transverse hidden beam and a long short pile, and can bear the oversized load of the upper part. The box structure top is provided with superstructure conversion roof beam 3, and the bottom of superstructure conversion roof beam 3 is provided with superstructure support 4, and superstructure support 4 supports the top at roof stringer 8. In addition, the ends of the two transverse ends of the upper structure conversion beam 3 can be supported by other pile foundations, as shown in fig. 1, the upper structure pile foundations 6 are arranged on two transverse sides of the box structure, the upper structure pile foundations 6 are arranged at the tops of the upper structure pile foundations 6, upper structure supporting seats 4 are arranged at the bottoms of the two transverse ends of the transverse line of the upper structure conversion beam 3, and the upper structure supporting seats 4 at the two transverse ends are supported at the tops of the upper structure foundation pile foundations 5. Therefore, the super-large load on the upper part is borne by the multi-part structure, the middle part is a box-shaped structure with long and short piles 13 and ribbed longitudinal and transverse hidden beams, and the two ends are an upper structure pile foundation 6 and an upper structure foundation bearing platform 5. The upper structure support 4 and the upper structure conversion beam 3 can be integrally cast, and the upper structure support 4 is a protrusion on the bottom surface of the upper structure conversion beam 3, and can also be provided as a split structure.
The construction method of the ribbed underground combined structure of the pile box comprises the following steps:
s1: and (3) constructing an open cut foundation pit supporting structure from the ground, and taking the open cut foundation pit supporting structure as a foundation pit support when the box structure is constructed after the later foundation pit is excavated. And (3) synchronously constructing long and short piles 13, and reserving connecting steel bars at the tops of the long and short piles 13.
S2: and excavating a foundation pit from the ground downwards in a layered manner to the bottom elevation of the box structure, exposing connecting steel bars reserved at the top of the long and short piles 13, and performing waterproof and cushion layer construction of the bottom plate.
S3: and binding the bottom plate steel bars of the box structure, reliably anchoring the bottom plate steel bars and the reserved connecting steel bars at the tops of the long piles 13, arranging hidden beam steel bars at the ribbed longitudinal and transverse hidden beams, and casting concrete by standing a mould to form the combined structure of the ribbed longitudinal and transverse hidden beams and the bottom plate.
S4: and arranging side wall steel bars and top plate steel bars of the box structure in a layered and segmented manner, arranging hidden beam steel bars at the position of the ribbed longitudinal and transverse hidden beam, pouring concrete, and forming a pile box ribbed combined structure together with the ribbed longitudinal and transverse hidden beam and bottom plate combined structure.
S5: and (3) performing construction of a waterproof layer and a protective layer on the upper part of the top plate, performing construction of an upper structure support 4 on the protective layer after finishing construction, and performing construction of an upper structure foundation bearing platform 5 and an upper structure pile foundation 6. Or the reserved steel bars of the top plate are connected with the reserved steel bars, and meanwhile, the upper structure foundation bearing platform 5 and the upper structure pile foundation 6 are applied.
S6: the upper structure support 4, the upper structure foundation bearing platform 5 and the upper structure pile foundation 6 are further provided with the upper structure cross beam 1, the upper structure column 2 and the upper structure conversion beam 3 to form an upper conversion structure.
In the structure of the invention, the box structure, the ribbed longitudinal and transverse hidden beams and the long and short piles form a box structure for bearing the upper oversized load, so that the problems of uneven stress distribution, small rigidity, poor integrity, large structural deformation, large settlement and poor safety when the box structure bears the upper oversized load can be effectively prevented. The structure can ensure that the internal force and deformation of the box structure are stable when the box structure bears the super-large load on the upper part, and is particularly suitable for the structural design of the open cut box tunnel under the super-large load on the upper part.
The foregoing description of the invention has been presented for purposes of illustration and description, and is not intended to be limiting. Several simple deductions, modifications or substitutions may also be made by a person skilled in the art to which the invention pertains, based on the idea of the invention.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310558991.4A CN116791670B (en) | 2023-05-18 | 2023-05-18 | Pile box reinforced rib underground composite structure and its construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310558991.4A CN116791670B (en) | 2023-05-18 | 2023-05-18 | Pile box reinforced rib underground composite structure and its construction method |
Publications (2)
| Publication Number | Publication Date |
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| CN116791670A true CN116791670A (en) | 2023-09-22 |
| CN116791670B CN116791670B (en) | 2025-09-23 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101011805B1 (en) * | 2010-09-08 | 2011-02-07 | 김진수 | Method of constructing underground structures crossing the pile foundation and underground structures constructed using the same |
| CN207498985U (en) * | 2017-09-29 | 2018-06-15 | 苏州科技大学 | A kind of partial precast assembly steel concrete combination underground pipe gallery for exempting from template |
| CN109555540A (en) * | 2017-09-27 | 2019-04-02 | 上海同吉建筑工程设计有限公司 | Tunnel form prestressed pipe curtain structure and construction method |
| CN115045179A (en) * | 2022-05-24 | 2022-09-13 | 杭州市交通工程集团有限公司 | Upper-bridge and lower-tunnel combined construction structure and construction method |
| CN219710390U (en) * | 2023-05-18 | 2023-09-19 | 中铁第一勘察设计院集团有限公司 | Pile box ribbed underground combined structure |
-
2023
- 2023-05-18 CN CN202310558991.4A patent/CN116791670B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101011805B1 (en) * | 2010-09-08 | 2011-02-07 | 김진수 | Method of constructing underground structures crossing the pile foundation and underground structures constructed using the same |
| CN109555540A (en) * | 2017-09-27 | 2019-04-02 | 上海同吉建筑工程设计有限公司 | Tunnel form prestressed pipe curtain structure and construction method |
| CN207498985U (en) * | 2017-09-29 | 2018-06-15 | 苏州科技大学 | A kind of partial precast assembly steel concrete combination underground pipe gallery for exempting from template |
| CN115045179A (en) * | 2022-05-24 | 2022-09-13 | 杭州市交通工程集团有限公司 | Upper-bridge and lower-tunnel combined construction structure and construction method |
| CN219710390U (en) * | 2023-05-18 | 2023-09-19 | 中铁第一勘察设计院集团有限公司 | Pile box ribbed underground combined structure |
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| CN116791670B (en) | 2025-09-23 |
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