CN212295096U

CN212295096U - Structure for reserving upper column pier for upper cover of metro vehicle section

Info

Publication number: CN212295096U
Application number: CN202020517531.9U
Authority: CN
Inventors: 郭俊锋; 吴映栋; 姚开明
Original assignee: Zhejiang Jiedi Architectural Design Co ltd
Current assignee: Jiedi Design Group Co ltd
Priority date: 2020-04-10
Filing date: 2020-04-10
Publication date: 2021-01-05
Anticipated expiration: 2030-04-10

Abstract

The utility model belongs to the building engineering field specifically, relates to a be used for railcar section upper cover to reserve upper portion pier structure, include: the upper cover beam plate and the upper column pier of the metro vehicle section are supported on the upper cover beam plate of the metro vehicle section, and the building structure column which is covered and developed falls into the column pier; wherein: an upper column pier is arranged on the upper cover beam plate of the metro vehicle section, a steel bar of the upper column pier is reserved, and an upper cover later development column is connected with the upper cover beam plate of the metro vehicle section through the column pier; the subway vehicle section upper cover beam plate and the upper part column pier are reliably connected at the interface of the new concrete and the old concrete through column pier vertical connecting reinforcing steel bars and column pier anti-sliding reinforcing steel bars reserved on the subway vehicle section upper cover beam plate. The utility model provides a subway vehicle section upper bent cap plate top adds the pier steel bar reservation requirement to guarantee that the upper portion post can reliably and flexibly connect with the subway vehicle section upper bent cap plate; the requirement of bearing capacity and anti-seismic performance of the upper portion column can be met, and the subway upper cover structure has the advantages of convenience in construction, low cost and capability of flexibly arranging the upper portion column to meet the requirement of development of a subway upper cover in a later period.

Description

Structure for reserving upper column pier for upper cover of metro vehicle section

Technical Field

The utility model belongs to the building engineering field specifically, relates to a structure that is used for railcar section upper cover to reserve upper portion pier.

Background

According to the requirement of the current urban subway development, the space above the subway vehicle segment cover is reasonably developed, the urban land value is fully excavated, and the method becomes the key point of subway development. At present, in order to relieve the pressure of public traffic, fully extend the frameworks of cities, coordinate the development of surrounding areas, vigorously build underground rail traffic, and establish single-layer subway vehicle sections for subway operation, parking maintenance and the like, the single-layer subway vehicle sections play an important role in subway development, and the occupation quantity of land is high. It is necessary to fully utilize urban land by utilizing wide space at the upper part of a subway train section and developing housing, business and other industries at the upper cover of the subway train.

However, in the subsequent development of the upper cover of the subway vehicle, the situations that the upper part of the upper cover beam plate to be developed is only in the scheme stage when the upper cover beam plate of the vehicle section is built are not completely determined, the problem of reliable connection between the upper cover structure and the upper cover beam plate of the vehicle section developed after years and the problem of hidden danger of water leakage under the cover caused by the fact that the upper cover structural member and the lower cover structural member need to be connected through steel bars are generally existed.

SUMMERY OF THE UTILITY MODEL

For overcoming the defect that prior art exists, the utility model provides a structure that is used for railcar section upper cover to reserve upper portion post mound not only can satisfy the requirement that follow-up development structure and upper cover in succession in the longer time span, possesses stronger shock resistance simultaneously, still has construction convenience, with low costs and upper portion post and can arrange in a flexible way in order to satisfy the advantage of later stage subway upper cover development.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a structure that is used for subway vehicle section upper cover to reserve upper portion pier includes: the upper cover beam plate and the upper column pier of the metro vehicle section are supported on the upper cover beam plate of the metro vehicle section, and the building structure column which is covered and developed falls into the column pier; wherein: an upper column pier is arranged on the upper cover beam plate of the metro vehicle section, a steel bar of the upper column pier is reserved, and an upper cover later development column is connected with the upper cover beam plate of the metro vehicle section through the column pier; the subway vehicle section upper cover beam plate and the upper part column pier are reliably connected at the interface of the new concrete and the old concrete through column pier vertical connecting reinforcing steel bars and column pier anti-sliding reinforcing steel bars reserved on the subway vehicle section upper cover beam plate.

Preferably, the upper pier reserves a vertical steel bar meeting the bearing capacity requirement, the vertical steel bar is a downward U-shaped closed steel bar and is anchored into the upper cover beam plate of the vehicle section, and the anti-slip steel bar is arranged in the horizontal range of the pier according to calculation.

Preferably, horizontal hoops are arranged within the height range of the upper column pier, and the distance is less than or equal to 100 mm.

Preferably, the longitudinal bars of the upper cover later-stage development column extend into the bottom of the column pier, the composite stirrups are arranged in the height of the column pier, and the requirement of seismic encryption of the stirrups at the column end is met.

Preferably, when pouring the pier concrete during subsequent covering development, a rough surface with the concave-convex difference not less than 6mm is formed by adopting a manual roughening method, and the interface of the new concrete and the old concrete is processed.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. vertical reinforcing steel bars meeting bearing capacity requirements are reserved on the periphery of the upper column pier, the vertical reinforcing steel bars are downward U-shaped closed reinforcing steel bars and are anchored into a capping beam plate on the vehicle section, the effective calculation cross section of the capping structure column bottom is increased, the shear bearing capacity of the column bottom is increased, and the seismic performance of the capping structure column root is realized.

2. Anti-slip steel bars are uniformly arranged in the column pier, when column pier concrete is poured during subsequent covering and development, a rough surface with the concave-convex difference not less than 6mm is formed by adopting a manual roughening method, and the interface of new and old concrete is processed, so that the effective horizontal force transfer capacity of the bottom of the column pier is ensured;

3. the covered structural column longitudinal ribs are arranged in the column piers, so that the covered structural column longitudinal ribs are prevented from being implanted into the upper cover beam plate of the vehicle, and the problem of hidden water leakage under the cover, which is possibly caused by the implanted ribs, is solved; by utilizing the larger plane size of the pier, the covered structural column can be flexibly shifted or the section can be increased or decreased on the basis of the original scheme, so that the positioning accuracy of the longitudinal rib of the covered structural column can be ensured, the construction cost is reduced, and the construction efficiency is improved; the eccentric force caused by the misalignment of the upper column net and the lower column net is balanced through the column piers, and the overall stability of the covering structure is finally ensured;

4. at pier high within range, cover the structure post and through setting up compound stirrup, improve pier core space shear capacity, increase the antidetonation ductility of newly-increased post bottom to improve and cover the whole shock resistance of structure post.

Drawings

Fig. 1 is a schematic plan view of a structure for a metro vehicle section upper cover reserved upper pier;

FIG. 2 is a schematic sectional view of a structure for a subway car section upper cover reserved upper pier;

in the figure: 1. capping beam board on the vehicle section, 2, upper portion column pier, 3, cover the structural column, 4, upper portion column pier reserve the stress type of falling U reinforcing bar, 5, reserve anti-skidding reinforcing bar in the upper portion column pier, 6, horizontal hoop, 7, cover the structural column and indulge the muscle, 8, cover the compound stirrup of structural column, 9, new and old concrete interface.

Detailed Description

As shown in fig. 1 and 2, the structure for reserving an upper pier for an upper cover of a metro vehicle section comprises: the upper capping beam plate 1 of the vehicle section and the upper column pier 2 are arranged on the vehicle section, and the upper column pier 2 is supported on the upper capping beam plate 1 of the vehicle section; according to the arrangement of the scheme stage of the covering structural column 3 and the stress requirement of the bottom of the covering structural column, in order to ensure the effectiveness of structural stress transmission and the convenience of construction, the vehicle section upper cover beam plate 1 and the covering structural column 3 are in transitional connection through the upper column pier 2, and the plane size and the height of the upper column pier 2 can be estimated and determined according to the scheme conservation calculation of the covering structural column 3; the construction method comprises the following steps that when the upper cover beam plate 1 of the vehicle section is constructed, the stress inverted U-shaped steel bar 4 and the anti-sliding steel bar 5 are reserved on the periphery of the upper column pier 2, wherein the plane size and the height of the upper column pier 2, the inverted U-shaped steel bar 4 and the anti-sliding steel bar 5 can be determined in a preliminary calculation and conservative mode according to a scheme of covering the structure; the effective section of the column bottom of the upper structural column 3 is covered through the larger section of the upper column pier 2, and the seismic performance of the column root is improved; and (5) carrying out short-term temporary rust and corrosion prevention protection on the reinforcing

steel bars

4 and 5 to finish the column pier reserving procedure.

After the upper cover building structure is completely determined, performing a manual roughening method on the new and old concrete interface 9 to form a rough surface with the concave-convex difference not less than 6mm, cleaning the rough surface by using a high-pressure water gun, and binding a horizontal hoop 6; according to the accurate positioning of the upper structural column 3, the upper structural column longitudinal ribs 7 and the composite stirrups 8 are bound and covered, so that the upper structural column longitudinal ribs 7 are prevented from being implanted into the upper cover beam plate of the vehicle; the covered structural columns 3 can be shifted in the range of the upper column piers 2 in comparison with the scheme stage, and are arranged according to the use requirements of the upper building, so that the covered structural columns have greater flexibility.

Set up compound stirrup 8 in upper portion pier 2, the interval is no longer than 100mm and satisfies the requirement is encrypted to the column end stirrup antidetonation, can improve and cover 3 nuclear region shear-resisting bearing capacity of structural column to can effectively retrain and cover structural column vertical reinforcement 7, realize covering the anti-seismic performance of structural column root.

The construction method for the structure of the upper reserved upper pier of the upper cover of the metro vehicle section comprises the following steps:

(1) reserving a circumferential stress inverted U-shaped steel bar 4 and an anti-sliding steel bar 5 of the upper column pier 2 during construction of the upper cover beam plate 1 of the vehicle section, and performing short-term temporary anti-corrosion protection on the

steel bars

4 and 5 to complete a column pier reserving procedure;

(2) after the upper cover building structure is developed and determined, in order to ensure that new and old concrete work together, a rough surface with the concave-convex difference not less than 6mm is formed on an interface 9 of the new and old concrete by a manual roughening method, and the rough surface is cleaned by a high-pressure water gun and bound with a horizontal hoop 6;

(3) accurately positioning the upper structural column 3, binding the upper structural column longitudinal ribs 7 and the composite stirrups 8, and avoiding the upper structural column longitudinal ribs 7 from being implanted into the upper cover beam plate of the vehicle;

(4) after the checking and receiving work is finished, the upper column pier 2 and the template covering the structural column 3 are installed, the elevation, the position and the size of the template accurately meet the design requirements, the support and the template are reliably fixed, and the splicing seam of the template is tight;

(5) pouring concrete on the upper column pier 2 and the upper covering structural column 3, continuously pouring for one-time forming, if necessary, intermittently shortening the intermittent time as much as possible, and pouring the upper concrete before the initial setting of the lower concrete; during vibration, the vibrating rod is prevented from colliding the template, pouring is stopped immediately if the template and the support deform and shift, and the poured concrete is well laid before being solidified. And (3) after the concrete is poured and finally set, starting watering and curing, and specifically comprehensively determining according to the concrete slump, air temperature and other conditions.

Claims

1. A structure that is used for subway vehicle section upper cover to reserve upper portion pier includes: the upper cover post-development column is connected with the upper cover beam plate of the subway vehicle section through the column pier; the method is characterized in that: the upper cover beam plate of the vehicle section is in transition connection with the upper structural column through an upper column pier, and the upper column pier is supported on the upper cover beam plate of the vehicle section; the subway vehicle section upper cover beam plate and the upper part column pier are reliably connected at the interface of the new concrete and the old concrete through column pier vertical connecting reinforcing steel bars and column pier anti-sliding reinforcing steel bars reserved on the subway vehicle section upper cover beam plate.

2. The structure for a metro vehicle section upper cover reserved upper pier as claimed in claim 1, wherein: rough surfaces with the concave-convex difference not less than 6mm are formed at the interface of the new concrete and the old concrete between the upper cover beam plate and the upper column pier of the vehicle section.

3. The structure for the upper cover reserved upper pier of the metro vehicle section according to claim 2, wherein: the plane size and height of the upper column pier, the inverted U-shaped steel bar and the anti-slip steel bar can be estimated and determined according to conservative calculation of the covered structural column; the U-shaped steel bar, the anti-sliding steel bar are pre-buried into the vehicle section upper bent plate, the anti-sliding steel bar is arranged inside the U-shaped steel bar, the U-shaped steel bar is longitudinally and transversely staggered, the horizontal hoop is arranged at the vertical periphery of the U-shaped steel bar, and the U-shaped steel bar is fixed through binding the steel bars at the intersection points.

4. The structure for a metro vehicle section upper cover reserved upper pier as claimed in claim 3, wherein: the cover structure post indulges muscle bottom cross-folding, do not need pre-buried income vehicle section upper cover beam slab, cover structure post and indulge the muscle and form the steel reinforcement cage through covering the compound stirrup of structure post, cover the compound stirrup of structure post and adopt horizontal hoop, the interval is less than or equal to 100mm, and satisfies the post end stirrup antidetonation requirement of encrypting.