Interface structure of newly-built channel of existing underground station
By installing an integrally enclosed interface ring beam on the outside of the existing underground station sidewall and combining it with a water collection box, the problems of complex construction and water seepage were solved, achieving efficient and safe interface structure construction and waterproofing effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-06
- Publication Date
- 2026-03-24
AI Technical Summary
Existing construction methods are complex at the interface between existing underground stations and new passages, resulting in numerous construction joints that affect the integrity and waterproofing performance of the structure, leading to slow construction progress and a high probability of water seepage.
An integrally enclosed interface ring beam is installed on the outside of the existing underground station side wall. It is fixedly connected to the side wall by rebar installation and cast in one go to form a ring beam structure. Combined with a water collection box, it prevents leakage.
It improves construction efficiency, reduces construction joints, enhances structural stability, prevents water seepage, ensures safe and convenient construction, and improves the long-term performance of the interface structure.
Smart Images
Figure CN224031745U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of subway construction, in particular to an interface structure of a new passage of an existing underground station. BACKGROUND
[0002] When the existing underground station is connected with the new passage, the interface ring beam is usually located in the structure side wall, and the wall in the interface range needs to be removed in blocks during construction, and the interface ring beam in the interface range is constructed in sections.
[0003] The existing construction method has the following defects: (1) the method of removing the wall in the interface range in blocks and constructing the interface ring beam has a relatively complex construction process, and the next section of removal can be carried out only after the concrete reaches the design strength and other specified conditions, so that the overall construction progress is relatively slow; (2) the interface ring beam is poured in multiple times, the continuity is poor, the number of ring beam construction joints is increased, the construction joint is a weak link of the structure, which can weaken the integrity and waterproof performance of the structure, increase the probability of structure water seepage in the later period, and affect the long-term use performance of the interface structure. UTILITY MODEL CONTENTS
[0004] The utility model aims at overcoming the above defects in the prior art, and provides an interface structure of a new passage of an existing underground station. The interface ring beam located outside the side wall of the existing underground station can be poured at one time, the number of construction joints is reduced, a closed reinforcing ring frame structure is quickly formed around the opening part after pouring, the existing underground structure side wall can still maintain good stability after the opening, various external forces can be resisted, and then the one-time removal of the existing structure in the interface range is realized, so that the construction is safer and more convenient.
[0005] The technical scheme of the utility model is as follows: an interface structure of a new passage of an existing underground station, wherein the interface ring beam is arranged outside the side wall of the existing underground station, the interface ring beam is arranged along the annular connecting surface of the side wall of the existing underground station and the concrete structure of the new passage, the interface ring beam is in an overall and closed annular beam shape, and the contact surface between the interface ring beam and the side wall of the existing underground station is arranged in a vertical direction.
[0006] The interface ring beam reinforcement is fixedly connected with the side wall of the underground station through the anchor bar, and is integrally poured at one time to form an overall interface ring beam.
[0007] The interface ring beam reinforcement is fixedly connected with the side wall of the existing underground station through the anchor bar arranged in a horizontal direction.
[0008] In the utility model, the interface ring beam connected with the top plate of the new passage is provided with a water receiving box below the contact surface of the upper part of the existing underground station, and the water receiving box is fixedly connected with the upper concrete structure of the underground station.
[0009] The utility model has the advantages that:
[0010] (1) Since the interface ring beam is arranged outside the side wall of the existing underground station, the construction space is relatively open, the steel bar binding and concrete pouring operation are more convenient, and the construction efficiency and construction quality are improved;
[0011] (2) The interface ring beam in the application is located outside the side wall of the existing underground station, and through the horizontally arranged planted bar, the interface ring beam can be integrally poured once, the number of beam construction joints is reduced, and the overall stress of the interface ring beam is beneficial;
[0012] (3) After the overall pouring construction of the interface ring beam is completed, the ring beam and the existing station side wall are in overall stress, the stress of the existing underground station side wall is redistributed at the interface ring beam position, at this time, the existing underground station side wall in the interface range can be chiseled once, without being chiseled in blocks, avoiding the complex process of multiple chiseling construction, the construction is more convenient, the construction efficiency is improved, and the process is shortened;
[0013] (4) Through the arrangement of the interface ring beam in the application, the new and old joint surface of the newly built channel and the existing underground structure is arranged vertically, so that a water receiving box can be arranged at the new and old joint surface of the upper part, and further prevent the seepage water from directly entering the newly built channel. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 is a schematic view of a connecting structure of an existing underground station and a newly built channel;
[0015] Figure 2 is a schematic view of a cross-sectional structure of an interface structure between an existing underground station and a newly built channel;
[0016] Figure 3 is an enlarged view of a local interface structure;
[0017] Figure 4 is a schematic view of the connection structure of the interface ring beam steel bar and the planted bar.
[0018] In the drawings:
[0019] 1 an existing underground station; 2 a side wall of the existing underground station; 3 an interface ring beam; 4 a newly built channel top plate; 5 a planted bar; 6 a newly built entrance and exit; 7 a water receiving box; 8 an interface ring beam steel bar. DETAILED DESCRIPTION
[0020] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific embodiments of the utility model will be described in detail below with reference to the drawings.
[0021] Specific details are set forth in the following description in order to provide a thorough understanding of the present application. However, the present application can be practiced in a variety of ways from which are different from those described and suggested herein without departing from the scope and spirit of the present application. Those skilled in the art will be able to make similar modifications without departing from the scope of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.
[0022] As shown in Figure 1 and Figure 2 The interface structure of the new channel of the existing underground station of the present application is located at the connection of the existing underground station concrete structure and the new channel concrete structure of the existing underground station 1. The interface structure comprises an interface ring beam 3, which is fixedly arranged at the existing underground station side wall 2 and is arranged along the hole opening range of the existing underground station structure side wall, so that the interface ring beam 3 is in a closed ring shape, and no reinforcing bar is arranged in the interface ring beam within the range of the reinforcing bar height.
[0023] The interface ring beam 3 is fixedly connected with the existing underground station side wall 2 through the reinforcing bar 5. The interface ring beam 3 is formed by pouring the interface ring beam reinforcing bar 8. As shown in Figure 4 The interface ring beam reinforcing bar 8 is fixedly connected with the existing underground station side wall 101 through the reinforcing bar 5. In the present application, since the interface ring beam 3 is located outside the existing underground station side wall 2, the contact surface between the interface ring beam 3 and the existing underground station side wall 2 is arranged in the vertical direction, and the reinforcing bar 5 is perpendicular to the contact surface, so the reinforcing bar 5 is arranged in the horizontal direction. Through the reinforcing bar 5 arranged in the horizontal direction, the fixed connection between the interface ring beam reinforcing bar 8 and the existing underground station side wall 101 is realized, and then the one-time integral pouring of the interface ring beam 3 can be realized.
[0024] The interface ring beam is integrally poured and connected with the existing underground structure side wall, and a solid ring frame reinforcing structure is rapidly formed in the hole opening range of the side wall, so that the interface range wall body can still maintain safety and stability after being removed at one time, and a certain length needs to be reserved according to the specification requirements during the cutting of the reinforcing bar in the hole opening range, so as to perform edge sealing and anchoring. Since the interface ring beam has been poured, the interface ring beam should not be damaged when the hole opening wall body is removed, and the hole opening surface needs to be roughened and the mortar is smoothed after being removed, so as to ensure that the thickness of the reinforcing bar protection layer meets the requirements.
[0025] The new and old joint surface between the newly built interface ring beam 3 and the existing underground station side wall 2 is a weak part of the structure waterproof, and the waterproof method at this position needs to be strengthened. The sundries and the original side wall waterproof of the joint surface should be removed before pouring the concrete, and then the cement-based permeable crystalline waterproof coating is laid, and one more circle of water-swelling water-stop rubber strip is arranged above and below the new and old joint surface. In addition, a repeated grouting pipe can be reserved in the interface ring beam, and the spacing between the grouting pipes is 4-5m. If necessary, the new and old joint surface between the interface ring beam 3 and the existing underground station side wall 2 can be grouted and water-stopped at the water leakage position.
[0026] Since the interface ring beam 3 is located outside the existing station underground side wall 2, the new and old concrete joint surface between the newly-built interface ring beam 3 and the existing underground station side wall 2 is vertical, and by utilizing the characteristics, a water receiving box 7 can be arranged directly below the top of the contact surface between the interface ring beam 3 and the existing underground station side wall 2, and the water receiving box 7 can be fixedly connected with the existing underground station side wall 2 through bolts, as shown in Figure 3 During long-term use of the underground structure, the leakage water generated at the new and old concrete joint surface can fall into the water receiving box 7, so that the leakage water can be prevented from directly entering the newly-built passage and affecting the normal use experience of the passage.
[0027] When the interface structure is used for construction of the newly-built passage of the existing underground station, first, the interface ring beam 3 of the existing underground station and the newly-built passage is arranged outside the side wall 2 of the existing underground station, is connected with the side wall 2 of the existing underground station through the horizontally arranged planted bar 5, and is formed by using the one-time integral pouring mode. After the interface ring beam 3 is poured, the existing structure in the interface range can be removed at one time, the newly-built entrance and exit 6 is formed, and thus the connection between the existing underground structure and the newly-built structure is completed.
[0028] The interface ring beam 3 arranged outside the side wall of the existing underground station is a ring beam, which can be integrally poured at one time and does not need to be divided into blocks. The interface ring beam 3 formed by the one-time integral pouring mode can form a whole stress system with the existing station structure more quickly, at this time, the stress of the side wall of the existing underground station in the opening range in the interface range is transferred to the interface ring beam 3, so that the stress state of the side wall structure after opening is kept safe and stable, and thus the side wall structure opening range of the existing underground station in the interface range can be removed at one time, the construction efficiency is improved, and the factors of complex and unstable structure stress caused by the segmented removal process are avoided.
[0029] The interface structure of the newly-built passage of the existing underground station provided by the utility model is described in detail. The principle and implementation mode of the utility model are described by applying specific examples in the text. The description of the above examples is only used for helping to understand the method and core idea of the utility model. It should be pointed out that the utility model can be improved and modified by the ordinary technical personnel in the technical field without departing from the principle of the utility model, and these improvements and modifications also fall within the protection scope of the utility model claims. The above description of the disclosed examples enables the professional technical personnel in the field to realize or use the utility model. Various modifications of the examples will be obvious to the professional technical personnel in the field, and the general principle defined in the text can be realized in other examples without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to the examples shown in the text, but will conform to the widest scope consistent with the principles and novel features disclosed in the text.
Claims
1. An interface structure for a newly constructed passageway in an existing underground station, characterized in that, This includes an interface ring beam installed on the outside of the side wall of the existing underground station. The interface ring beam is set along the annular connection surface between the side wall of the existing underground station and the concrete structure of the newly built passage. The interface ring beam is an integral and closed annular beam. The contact surface between the interface ring beam and the side wall of the existing underground station is set in the vertical direction. The reinforcing bars of the interface ring beam are fixedly connected to the existing underground station side wall through horizontally installed rebar.
2. The interface structure for newly constructed passages in existing underground stations according to claim 1, characterized in that, The reinforcing bars of the interface ring beam are fixedly connected to the side wall of the underground station by rebar installation and are cast in one piece to form an integral interface ring beam.
3. The interface structure for newly constructed passages in existing underground stations according to claim 1, characterized in that, A water collection box is installed directly below the contact surface between the interface ring beam that connects to the top slab of the new passage and the side wall of the existing underground station. The water collection box is fixedly connected to the side wall of the existing underground station.