Interface protection device and underground loop tunnel interface construction structure
By using a combination of PVC protective casing and protective structural concrete at the interface of the underground loop tunnel, the corrosion and construction quality of structural steel bars are solved, and the safe and high-quality construction of the interface structure is achieved.
Patent Information
- Application Number
- CN202422179234.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-05
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-09-05
AI Technical Summary
When the underground loop tunnel is co-constructed with the plot, the structural steel bars at the interface are prone to rust, bent, or the wire heads are rusted and broken, resulting in construction quality and safety issues.
The interface protection device is adopted, which includes a PVC protective sleeve on the structural steel bars and a sleeve seal at the end of the structural steel bars. At the same time, protective structural concrete is filled between the structural steel bars, and wedge holes are set up between them, and a concrete intercepting net is set up between the protective structural concrete and the loop tunnel concrete.
Effectively prevent structural steel bars from corroding, ensure the construction quality and safety of the interface structure, simplify the construction process, reduce difficulty, and improve operability.
Smart Images
Figure CN223048817U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of building construction, and particularly relates to an interface protection device and an underground loop tunnel interface construction structure. Background Art
[0002] In the past, when an underground loop tunnel was jointly constructed with a plot, due to the sequence of planning and development, there were often situations where the loop preceded the plot or the plot preceded the loop, that is, the loop and the plot were not constructed simultaneously. Therefore, it was necessary to reserve structural steel bars at the interface. However, due to the lack of protection for the structural steel bars at the interface, there were often quality problems such as corrosion of the structural steel bars, bending of the structural steel bars (damage by earth excavation machinery), rusting and breaking of the thread heads of the structural steel bars, resulting in the inability to construct the interface main structure for the later constructed plot or loop, and thus the interface construction quality could not be guaranteed. Content of the Utility Model
[0003] The purpose of the utility model is to overcome the shortcomings in the prior art and provide an interface protection device and an underground loop tunnel interface construction structure.
[0004] To achieve the above purpose, the technical solution adopted by the utility model is as follows:
[0005] The utility model includes an underground loop tunnel interface construction structure, which includes a loop tunnel structure, multiple structural steel bars arranged at the interface of the loop tunnel structure, and an interface protection device arranged on the structural steel bars; the interface protection device includes a protection sleeve sleeved on the structural steel bars and a sleeve end cap arranged at the end of each structural steel bar.
[0006] Protective structural concrete is filled between the multiple structural steel bars.
[0007] Wedging holes are arranged at the positions between adjacent structural steel bars in the protective structural concrete.
[0008] Loop tunnel concrete is arranged in the loop tunnel structure; a concrete interception net is arranged between the protective structural concrete and the loop tunnel concrete.
[0009] The reserved joints of the structural steel bars are staggered by 50%.
[0010] The protection sleeve is a PVC protection sleeve.
[0011] Compared with the prior art, the beneficial effects of the utility model are:
[0012] The interface protection device (hereinafter referred to as the protection device) of the technical solution of this application uses a protective sleeve to protect the structural steel bars, avoiding the corrosion of the reserved structural steel bars at the interface caused by backfill soil; ensuring the construction quality and structural safety of the interface structure. At the same time, the form of the sleeve facilitates the overall peeling of the protection structure and the structural steel bars after being broken later.
[0013] In the construction structure of the underground loop tunnel interface, wedge holes are provided between the adjacent structural steel bars in the protection structure concrete, which can effectively avoid the mechanical undifferentiated excavation and breaking of the reserved main bars at the interface during later earth backfilling or plot earth excavation, resulting in the inability to construct the reserved main bars later; at the same time, a concrete interception net is provided between the protection structure concrete and the loop tunnel concrete, which can effectively separate the loop tunnel structure concrete from the protection concrete.
[0014] The action mechanism of the construction structure of the underground loop tunnel interface of this application is simple, the construction difficulty is small, and the operability is strong; it avoids the corrosion of the reserved main bars at the interface caused by backfill soil; ensures the construction quality and structural safety of the interface structure. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 is the overall structural schematic diagram of the construction structure of the underground loop tunnel interface;
[0016] Figure 2 is the partial structural schematic diagram of the construction structure of the underground loop tunnel interface;
[0017] Figure 3 is the structural steel bar cross-sectional structural schematic diagram of the construction structure of the underground loop tunnel interface. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0018] In order to enable those skilled in the art of this technical field to better understand the technical solution of this utility model, the following further detailed description of this utility model is given in conjunction with the drawings and the best embodiments.
[0019] Figures 1-3 There is shown a construction structure of an underground loop tunnel interface, including a loop tunnel structure 9, a plurality of structural steel bars 1 provided at the interface of the loop tunnel structure 9, and an interface protection device; the interface protection device includes a protective sleeve 2 sleeved on the structural steel bar 1 and a sleeve end seal 3 provided at the end of each structural steel bar. The reserved joints of the structural steel bars are staggered by 50%. The protective sleeve is a PVC protective sleeve.
[0020] Figure 3It is shown that protective structure concrete 8 is filled between the multiple described structural steel bars. Wedging holes 5 are arranged at positions between the adjacent structural steel bars within the protective structure concrete. Loop tunnel concrete is provided within the loop tunnel structure; a concrete interception net 4 is arranged between the protective structure concrete and the loop tunnel concrete.
[0021] During the construction process at the interface of the underground loop tunnel, taking the loop construction first and the plot construction later as an example, multiple structural steel bars 1 are reserved at the interface of the loop tunnel structure. The structural steel bars include ordinary structural steel bars 1-1 and connecting structural steel bars 1-2 provided with joints. The setting principle is that the reserved joints are staggered by 50%, that is, the ordinary structural steel bars 1-1 and the connecting structural steel bars 1-2 provided with joints are arranged alternately to ensure the construction quality.
[0022] After the main reinforcement is tied, PVC protective sleeves 2 are installed on the outside of each structural steel bar. The main function is to prevent the structural steel bars from rusting and to isolate the structural steel bars 1 from the protective concrete 8 for convenient overall peeling in the later stage; after the PVC protective sleeves are installed, the sleeves are sealed with end caps 3 to complete the end capping.
[0023] Loop tunnel concrete is provided within the loop tunnel structure; a concrete interception net 4 is arranged between the protective structure concrete and the loop tunnel concrete. The loop tunnel structure concrete is effectively separated from the reserved main reinforcement protective concrete.
[0024] Wedging holes 5 are embedded within the spacing of the structural steel bars 1 for convenient breaking and peeling of the later protective device; after the entire protective device is installed, the concrete 9 of the loop tunnel is first poured. After its initial setting, the protective structure concrete 8 is poured; after the formwork is removed, the earthwork 7 backfilling operation is completed.
[0025] During the plot construction, the quality of the reserved structural steel bars is ensured through this protective structure, and mechanical undifferentiated excavation is avoided from damaging the reserved main reinforcement. After the excavation is completed, the protective structure is drilled and split through the wedging holes. After all are split, a series of processes such as the peeling of the protective structure, local adjustment of the reserved structural steel bars, interface roughening, connection with the plot main reinforcement, and pouring of concrete for structural connection are carried out in sequence.
[0026] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.
Claims
1. An underground loop tunnel interface construction structure, characterized in that: It comprises a loop tunnel structure, a plurality of structural steel bars arranged at the interface of the loop tunnel structure, and an interface protection device arranged on the structural steel bars; The interface protection device comprises a protective sleeve sleeved on the structural steel bar and a sleeve end seal arranged at the end of each structural steel bar.
2. The underground loop tunnel interface construction structure according to claim 1 is characterized in that: The plurality of structural steel bars are filled with protective structural concrete.
3. The underground loop tunnel interface construction structure according to claim 1 is characterized in that: Wedge holes are arranged at positions between adjacent structural steel bars in the protective structural concrete.
4. The underground loop tunnel interface construction structure according to claim 1, characterized in that: Loop tunnel concrete is arranged in the loop tunnel structure; a concrete interception net is arranged between the protective structure concrete and the loop tunnel concrete.
5. The underground loop tunnel interface construction structure according to claim 1, characterized in that: The reserved joints of the structural reinforcement are staggered by 50%.
6. The underground loop tunnel interface construction structure according to claim 1, characterized in that: The protective sleeve is a PVC protective sleeve.