Column type inspection pit structure in vehicle base garage with large pre-embedded connecting piece positioning tolerance

Abstract

The utility model discloses a vehicle base garage inner column type inspection pit structure with large pre-buried connecting piece positioning tolerance, which comprises a prefabricated upright post, a ground beam and a cast-in-place wet node, and the prefabricated upright post is connected with the ground beam through the cast-in-place wet node. The prefabricated stand columns comprise stand column main reinforcements, stand column stirrups and stand column concrete wrapping the stand column main reinforcements and the stand column stirrups, the bottom ends of the stand column main reinforcements extend to the position below the bottom face of the stand column concrete, and the stand column stirrups are arranged on the stand column main reinforcements in a hooped mode; the cast-in-place wet joint comprises a pre-embedded door-shaped rib, a cast-in-place joint stirrup and wet joint concrete wrapping the pre-embedded door-shaped rib, the cast-in-place joint stirrup and the bottom end of the stand column main rib, and the cast-in-place joint stirrup is arranged at the bottom end of the pre-embedded door-shaped rib and the bottom end of the stand column main rib in a hooped mode. The cast-in-place wet node has the advantages that the structural stability can be improved through the matching between the prefabricated stand column and the cast-in-place wet node, and meanwhile, the problems of maintenance and repair of bolted parts and corrosion prevention of iron pieces in later operation are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of rail transit, especially a vehicle base in -building column type inspection pit structure with large positioning tolerance of pre -buried connecting piece. BACKGROUND

[0002] Rail prefabrication is the industry development trend, and vehicle base in-building inspection pit column prefabrication has begun to be gradually popularized and applied. The existing urban rail transit in-building inspection pit prefabricated column mostly adopts steel bar adapter, grouting sleeve connection or column direct planting into girder and other modes. The scheme of steel bar adapter or grouting sleeve connection steel bar and other modes is difficult to accurately butt joint and connect on site, and the reserved steel bar has high rework rate and large rework construction difficulty. The scheme of column planting into girder has problems such as low construction operation surface of erecting prefabricated column, multi-specialty cross construction and the like in construction procedure, and has insufficient construction convenience. SUMMARY

[0003] The utility model aims at providing a vehicle base in-building column type inspection pit structure with large positioning tolerance of pre -buried connecting piece according to the deficiency of the prior art, which is composed of prefabricated column, girder and cast-in-situ wet joint, and is connected through cast-in-situ wet joint between prefabricated column and girder, can improve structural stability, and avoids maintenance and repair of bolted parts and iron part corrosion problems in later operation.

[0004] The utility model aims at realizing the following technical scheme:

[0005] A vehicle base in-building column type inspection pit structure with large positioning tolerance of pre -buried connecting piece, which comprises prefabricated column, girder and cast-in-situ wet joint, the prefabricated column is connected with the girder through the cast-in-situ wet joint, the prefabricated column comprises column main reinforcement, column stirrup and column concrete wrapped in the column main reinforcement and the column stirrup, the column main reinforcement is vertically arranged, a plurality of column main reinforcements are arranged in a rectangular manner, the column main reinforcement extends to below the bottom surface of the column concrete, and the column stirrup is wrapped on the column main reinforcement. The cast-in-situ wet joint comprises pre -buried door type reinforcement, cast-in-situ joint stirrup and wet joint concrete wrapped in the pre -buried door type reinforcement, the cast-in-situ joint stirrup and the bottom end of the column main reinforcement, a plurality of pre -buried door type reinforcements are arranged along the length direction of the girder reserved rectangular structure pit of the girder, and the bottom end of the pre -buried door type reinforcement extends below the bottom surface of the girder reserved rectangular structure pit of the girder.

[0006] The middle part of the prefabricated column is a hollow structure, the top surface of the hollow structure is below the top surface of the column concrete, and the bottom surface is flush with the bottom surface of the column concrete.

[0007] The bottom end of the column main reinforcement is provided with a tack-welded anchor head.

[0008] The bottom end of the column main reinforcement is located at a certain distance above the bottom surface of the rectangular structure pit reserved for the ground beam.

[0009] The bottom surface of the column concrete is flush with the top surface of the rectangular structure pit reserved for the ground beam.

[0010] The bottom surface of the column concrete is a rough surface.

[0011] The top surface of the column concrete is pre-buried with a fastener insulating sleeve.

[0012] The vehicle base warehouse column inspection pit structure of the utility model has the advantages that the door-shaped reinforcement is reserved in the ground beam foundation, the main reinforcement of the column is staggered and mutually anchored in the node, the prefabricated column and the ground beam foundation are assembled and connected in wet mode, the tolerance of the reserved reinforcement is large, the structural stability is high, the interface of the civil engineering and track construction is clearly divided, the process is clear and simple, and the use cost is low. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a perspective view of the vehicle base warehouse column inspection pit structure of the utility model;

[0014] Figure 2 It is a sectional view of the vehicle base warehouse column inspection pit structure of the utility model;

[0015] Figure 3 It is a layout schematic view of the pre-buried door-shaped reinforcement and the column main reinforcement of the utility model;

[0016] Figure 4 It is a schematic view of the bottom of the prefabricated column of the utility model;

[0017] Figure 5 It is an elevation view of step 1 of the construction method of the vehicle base warehouse column inspection pit structure of the utility model;

[0018] Figure 6 It is a front view of step 1 of the construction method of the vehicle base warehouse column inspection pit structure of the utility model;

[0019] Figure 7 It is a plan view of step 1 of the construction method of the vehicle base warehouse column inspection pit structure of the utility model;

[0020] Figure 8 It is an elevation view of step 2 of the construction method of the vehicle base warehouse column inspection pit structure of the utility model;

[0021] Figure 9 It is a side view of step 2 of the construction method of the vehicle base warehouse column inspection pit structure of the utility model;

[0022] Figure 10 This is a top view of step 2 of the construction method for the column-type inspection pit structure in the vehicle base garage of this utility model.

[0023] Figure 11 The side view shows steps 3 and 4 of the construction method for the column-type inspection pit structure in the vehicle base garage of this utility model.

[0024] Figure 12 This is a front view of steps 3 and 4 of the construction method for the column-type inspection pit structure in the vehicle base garage of this utility model.

[0025] like Figures 1-12 As shown in the figure, the labels represent:

[0026] 1. Precast column; 11. Main reinforcement of column; 12. Welded anchor head; 13. Column stirrup; 14. Hollow structure; 15. Fastener insulating sleeve;

[0027] 2. Cast-in-place wet joint; 21. Embedded portal reinforcement; 22. Stirrups for cast-in-place joint;

[0028] 3. Ground beam; 31. Rectangular structural pit reserved for ground beam. Detailed Implementation

[0029] The features and other related features of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments, so as to facilitate the understanding of those skilled in the art:

[0030] Example: Figures 1-4 As shown, this embodiment relates to a column-type inspection pit structure in a vehicle base garage with a large tolerance for the positioning of pre-embedded connectors. It mainly includes precast columns 1, ground beams 3, and cast-in-place wet joints 2. The precast columns 1 and ground beams 3 are connected via the cast-in-place wet joints 2. The precast columns 1 include main reinforcement bars 11, stirrups 13, and column concrete encasing the main reinforcement bars 11 and stirrups 13. The stirrups 13 are completely encased in the column concrete, and the main reinforcement bars 11 are partially encased in the column concrete. The main reinforcement bars 11 are vertically arranged, with multiple bars arranged in a rectangular pattern. The bottom of the main reinforcement bars 11 extends below the bottom surface of the column concrete, and the stirrups 13 are attached to the main reinforcement bars 11. The middle part of the precast column 1 is a hollow structure 14, with the top surface of the hollow structure 14 located below the top surface of the column concrete and the bottom surface flush with the bottom surface of the column concrete. Anchor heads 12 are welded to one or both sides of the bottom end of the main reinforcement bar 11 of the column. The bottom end of the main reinforcement bar 11 of the column is located at a certain distance above the bottom surface of the reserved rectangular structural pit 31 of the ground beam 3. The bottom surface of the column concrete is flush with the top surface of the reserved rectangular structural pit 31 of the ground beam 3. The bottom surface of the column concrete is rough. A fastener insulating sleeve 15 is embedded in the top surface of the column concrete to facilitate the installation of the fastener iron seat.

[0031] like Figures 1-4 As shown, the cast-in-place wet node 2 includes embedded portal reinforcement 21, cast-in-place node stirrups 22, and wet node concrete wrapped around the bottom of the embedded portal reinforcement 21, the cast-in-place node stirrups 22, and the column main reinforcement 11. The wet node concrete fills the reserved rectangular structural pit 31 of the ground beam 3. Multiple embedded portal reinforcement 21 are spaced along the length of the reserved rectangular structural pit 31 of the ground beam 3. The bottom of the embedded portal reinforcement 21 extends below the bottom surface of the reserved rectangular structural pit 31 of the ground beam 3. The cast-in-place node stirrups 22 are attached to the bottom of the embedded portal reinforcement 21 and the column main reinforcement 11.

[0032] In this embodiment, the prefabricated column 1 has a height of 600~1200mm, and its cross-sectional size is designed to be 320×320mm based on the dimensions of the fastener base, forming an overall rectangular structure. A hollow structure 14 with a diameter of 120mm is set at the center of a range from the bottom surface to 250mm below the top surface of the prefabricated column 1 for lightweight design, reducing transportation and hoisting difficulties. The prefabricated column 1 has chamfered edges to reduce bumps and increase aesthetics. Several hoisting / adjustment holes and 86 junction boxes can be provided on the sides of the prefabricated column 1 according to the track laying, hoisting, fine adjustment, and professional requirements of interfaces such as motion cameras and signals. During the prefabrication of the prefabricated column 1, eight main column reinforcement bars 11 are reserved at the bottom, with an extension length of 245mm. The design dimensions of the rectangular structure pit 31 reserved for the ground beam are 320×500×250mm. The bottom end of the main reinforcement bar 11 of the column is arranged crosswise with the reserved reinforcement bar (embedded portal reinforcement bar 21) of the ground beam, without the need for welding, and the tolerance of the ground beam pre-embedded reinforcement bar is relatively large. 3-4 pre-embedded portal reinforcement bars 21 with a spacing of 100-150mm are set in the ground beam foundation at the corresponding position of each precast column 1. The anchorage length below the bottom surface of the reserved rectangular structural pit 31 of the ground beam is not less than 300mm, and the length extending above the bottom surface of the reserved rectangular structural pit 31 of the ground beam is 230mm, serving as the staggered mutual anchorage reinforcement bars of the cast-in-place wet node 2.

[0033] like Figures 5-12 As shown, this embodiment also includes a construction method for a column-type inspection pit structure in a vehicle base garage with a large tolerance for the positioning of pre-embedded connectors. The specific steps of this construction method are as follows:

[0034] like Figures 5-7 As shown, the foundation for the column-type inspection pit is poured: the ground beam is poured to the finished surface of the inspection pit structure, and a rectangular structural pit 31 with dimensions of 320×500×250mm is reserved at the positioning position of the precast column 1. The pit is equipped with embedded portal reinforcement 21.

[0035] like Figures 8-10 As shown, the existing inspection pit structure is used to complete the construction of the tooling, and an adjustable side-bearing support frame is used to hoist and pre-position the prefabricated column 1.

[0036] like Figures 11-12 As shown, tie the stirrups 22 of the cast-in-place node and support the formwork around the cast-in-place wet node 2.

[0037] like Figures 11-12 As shown, using the column positioning fixture to position the rail surface elevation, the precast column 1 is precisely adjusted to the design position, and then wet joint concrete is poured to complete the assembly.

[0038] The beneficial technical effects of this embodiment are as follows: when applied to the inspection pit structure in the vehicle depot, portal steel bars are reserved in the ground beam foundation, and the main bars extending from the column are staggered and anchored to each other in the node, so that the prefabricated column and the ground beam foundation are assembled and wet-jointed. The reserved steel bars have a large tolerance and high structural stability. At the same time, it also has the advantages of clear division of civil engineering and track construction interfaces, clear and simple procedures, and low cost of use.

[0039] Although the above embodiments have described the concept and embodiments of the present invention in detail with reference to the accompanying drawings, those skilled in the art will recognize that various improvements and modifications can still be made to the present invention without departing from the scope of the claims, and therefore will not be elaborated here.

Claims

1. A column-type inspection pit structure for a vehicle base garage with a large tolerance for pre-embedded connector positioning, characterized in that: The precast column, the ground beam and the cast-in-situ wet joint are connected through the cast-in-situ wet joint between the precast column and the ground beam, the precast column comprises column main reinforcement, column stirrups and column concrete wrapped in the column main reinforcement and the column stirrups, the column main reinforcement is vertically arranged, the column main reinforcement is provided with a plurality of column main reinforcements arranged in a rectangular shape, the column main reinforcement extends to below the bottom surface of the column concrete, and the column stirrups are arranged on the column main reinforcement; the cast-in-situ wet joint comprises embedded door-shaped reinforcement, cast-in-situ joint stirrups and wet joint concrete wrapped in the embedded door-shaped reinforcement, the cast-in-situ joint stirrups and the bottom end of the column main reinforcement, the embedded door-shaped reinforcement is provided with a plurality of embedded door-shaped reinforcements along the length direction of the ground beam reserved rectangular structure pit of the ground beam, the bottom end of the embedded door-shaped reinforcement extends to below the bottom surface of the ground beam reserved rectangular structure pit of the ground beam, and the cast-in-situ joint stirrups are arranged on the embedded door-shaped reinforcement and the bottom end of the column main reinforcement.

2. The vehicle base depot in-pit column type inspection pit structure with large positioning tolerance of a pre-embedded connecting piece according to claim 1, characterized in that: The middle part of the precast column is a hollow structure, the top surface of the hollow structure is below the top surface of the column concrete, and the bottom surface is flush with the bottom surface of the column concrete.

3. The vehicle base garage column type inspection pit structure with large positioning tolerance of a pre-embedded connecting piece according to claim 1, characterized in that: An anchor head is attached and welded on the bottom end of the column main reinforcement.

4. The vehicle base garage column type inspection pit structure with large positioning tolerance of a pre-embedded connecting piece according to claim 1, characterized in that: The bottom end of the column main reinforcement is located at a certain distance above the bottom surface of the ground beam reserved rectangular structure pit of the ground beam.

5. The vehicle base garage column type inspection pit structure with large positioning tolerance of a pre-embedded connector according to claim 1, characterized in that: The bottom surface of the column concrete is flush with the top surface of the ground beam reserved rectangular structure pit of the ground beam.

6. The vehicle base garage column type inspection pit structure with large positioning tolerance of a pre-embedded connector according to claim 1, characterized in that: The bottom surface of the column concrete is a rough surface.

7. The vehicle base garage column type inspection pit structure with large positioning tolerance of a pre-embedded connector according to claim 1, characterized in that: A fastener insulation sleeve is embedded in the top surface of the column concrete.

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