A shield tunnel station vertical component and segment connecting node structure and construction process

Abstract

The application discloses a kind of shield vehicle station vertical component and pipe piece connecting node structure and construction technology, belong to shield vehicle station technical field, including closed side plate and post-pouring concrete;It is installed by being set to the closed side plate on the both sides of vertical component, to form open operation space before closed side plate is not closed, facilitate staff construction, and ensure the welding quality of first reinforcing steel and second reinforcing steel;At the same time, by high-level grouting in the pouring space formed, post-pouring concrete is formed, the compactness of concrete is guaranteed, and the rigid connection node structure with high integrity and strong earthquake resistance is formed.The shield vehicle station vertical component and pipe piece connecting node structure and construction technology of the application completely eliminate the formwork and formwork removal process, the construction process is smooth, the fault tolerance is high, the key path construction period can be significantly shortened, the construction efficiency is improved, and a large amount of formwork material and labor cost is saved, and the comprehensive cost is reduced.

Description

Technical Field

[0001] This invention belongs to the field of shield tunneling station technology, specifically relating to a connection node structure and construction process for vertical components and segments in a shield tunneling station. Background Technology

[0002] With the rapid development of urban rail transit construction, the shield tunneling method has been widely used in the construction of subway stations due to its advantages such as high construction efficiency and minimal impact on the surrounding environment. In the construction of shield tunneling stations, vertical components (such as central columns and uprights) serve as important internal components that divide space and bear loads, and the connection nodes between them and the tunnel lining segments are key parts of the structural stress.

[0003] Currently, the industry mainly uses the following methods to handle this node: (1) Concrete connection after integral pre-embedded steel cover plate: This method usually uses an integrally welded steel cover to be fastened to the top of the vertical member, and then concrete is poured after connecting it to the pipe segment and the vertical member with bolts. Although this method eliminates the need for formwork to a certain extent, the integral steel cover structure is bulky and requires extremely high alignment accuracy during installation. Moreover, if there is an installation error in the vertical member or the pre-embedded part of the pipe segment, the integral steel cover is difficult to position, often requiring on-site gas cutting to enlarge the hole, which damages the member and affects the construction period. More importantly, this type of scheme closes the space for rebar connection inside, making it inconvenient for construction personnel to perform high-quality welding operations on the pipe segment rebar and the protruding rebar of the vertical member, making it difficult to guarantee the quality of this critical link of rebar connection.

[0004] (2) Full cast-in-place connection; that is, a post-cast area is reserved at the end of the pipe segment and the vertical component, and the steel bars are tied and complex formwork is erected on site before the concrete is poured. Although this method can form a good integrity, its drawbacks are very prominent: First, the construction efficiency is very low, the safety hazards are great, and the material loss is serious when the formwork is erected, reinforcement and dismantling are carried out in the narrow underground space; Second, the formwork support points usually need to be set on the pipe segment, which may damage the pipe segment and affect its waterproof and load-bearing capacity; In addition, the shrinkage of the post-cast concrete is prone to produce cracks at the joint surface, affecting durability.

[0005] (3) Pure dry connection, such as socket or bolt direct connection; this type of method has a fast construction speed, but the node stiffness and integrity are poor, and it cannot effectively transfer bending moment and shear force. It is difficult to meet the mechanical performance requirements of the main load-bearing vertical components, and the seismic resistance is particularly weak. It can usually only be used for non-load-bearing partitions.

[0006] In summary, existing technologies generally face the following core contradictions: prefabricated solutions that pursue construction efficiency often sacrifice the integrity of nodes and the reliability of steel reinforcement connections; while cast-in-place solutions that pursue the integrity of nodes are inefficient and have complex procedures; at the same time, existing prefabricated solutions generally have poor adaptability to construction errors and lack effective fault tolerance mechanisms. Summary of the Invention

[0007] In response to one or more of the above-mentioned defects or improvement needs of the existing technology, the present invention provides a connection node structure and construction process for vertical components and segments of a shield tunneling station, which can achieve dense concrete pouring without formwork and has high tolerance for related errors of segments and vertical components.

[0008] To achieve the above objectives, one aspect of the present invention provides a connection node structure between vertical components and tunnel segments in a shield tunneling station, including a closed side plate and post-cast concrete; The two closed side plates are respectively disposed on the horizontal sides of the vertical member. One end of the closed side plate is fixedly connected to the vertical member, and the other end is fixedly connected to the inner wall of the segment. The two closed side plates, the segment, and the vertical member enclose the casting space. A first reinforcing bar is provided on the inner wall of the segment, and a second reinforcing bar is provided on the side of the vertical member near the segment, with one end of the first reinforcing bar and one end of the second reinforcing bar extending into the casting space; The post-cast concrete is filled into the casting space by on-site casting.

[0009] As a further improvement of the present invention, the first steel bar and the second steel bar are welded in a one-to-one correspondence.

[0010] As a further improvement of the present invention, the closed side plate is an inverted L-shaped steel plate.

[0011] As a further improvement of the present invention, an adjustment pad is provided between the closed side plate and the tube segment to compensate for the gap between them.

[0012] As a further improvement of the present invention, the adjusting pad is an EVA sponge pad, and the two sides of the EVA sponge pad are bonded to the closed side plate and the tube segment by epoxy resin adhesive.

[0013] As a further improvement of the present invention, both of the closed side plates are provided with a plurality of through holes, which are connected to the casting space; the through holes on one of the closed side plates are used as casting holes, and the through holes on the other closed side plate are used as venting holes.

[0014] Another aspect of the present invention provides a construction process for the connection node structure between the vertical components and tunnel segments of a shield tunneling station, used for the construction of the aforementioned connection node structure between the vertical components and tunnel segments of a shield tunneling station, characterized by comprising the following steps: (1) Insert the first steel bar into the inner wall of the segment and hoist the vertical component to the design position; (2) A closed side plate is fixedly connected to the inner wall of the segment and the outer wall of one side of the vertical component; (3) Weld the first reinforcing bar and the second reinforcing bar extending from the vertical member together; (4) The other closed side plate is movably installed on the outer wall of the other side of the vertical member, and the closed side plate is attached to the outer wall of the vertical member, and a grouting gap is formed between the top of the closed side plate and the inner wall of the segment, so that the two closed side plates, the segment, and the vertical member form an unclosed casting space. (5) Concrete is poured into the pouring space through the grouting gap, while the other closed side plate is gradually moved upward to gradually reduce the grouting gap; (6) When the other closed side plate moves to be in close contact with the inner wall of the tunnel segment, stop moving and fix the other closed side plate to the tunnel segment and vertical member. After the concrete solidifies, the post-cast concrete is formed to complete the construction of the connection node structure between the vertical member and the tunnel segment of the shield station.

[0015] As a further improvement of the present invention, in step (4), another closed side plate is slidably installed on the outer wall of the other side of the vertical member through a sliding guide rail, and the lifting mechanism is pressed against the bottom of the other closed side plate, and the closed side plate is gradually lifted upward by the lifting mechanism.

[0016] Another aspect of the present invention provides a construction process for the connection node structure between the vertical components and tunnel segments of a shield tunneling station, used for the construction of the aforementioned connection node structure between the vertical components and tunnel segments of a shield tunneling station, characterized by comprising the following steps: (1) Insert the first steel bar into the inner wall of the segment and hoist the vertical component to the design position; (2) Through holes are made on the two closed side plates respectively, and one closed side plate is fixedly connected to the inner wall of the segment and the outer wall of one side of the vertical component; (3) Weld the first reinforcing bar and the second reinforcing bar extending from the vertical member together; (4) Fix the other closed side plate to the inner wall of the segment and the outer wall of the other side of the vertical member; (5) Use the through hole on one of the closed side plates as the pouring hole and inject concrete into the pouring space through the pouring hole; use the through hole on the other closed side plate as the vent hole. Stop injecting concrete when concrete continues to flow out of the vent hole. After the concrete solidifies, post-pouring concrete is formed, and the construction of the vertical components and segment connection node structure of the shield station is completed.

[0017] The aforementioned improved technical features can be combined with each other as long as they do not conflict with each other.

[0018] In summary, the beneficial effects of the above-described technical solutions conceived by this invention compared with the prior art include: (1) The shield tunnel station vertical component and segment connection node structure and construction process of the present invention, by setting up installable closed side plates on both sides of the vertical component, an open working space is formed before the closed side plates are closed, which facilitates the construction of workers and ensures the welding quality of the first and second reinforcing bars; at the same time, by performing high-level grouting into the formed pouring space to form concrete after pouring, the concrete density is ensured, and a rigid connection node structure with high integrity and strong earthquake resistance is formed.

[0019] (1) The shield tunnel station vertical component and segment connection node structure and construction technology of the present invention completely eliminate the formwork and demolding process, the construction process is smooth, the fault tolerance rate is high, the critical path construction period can be significantly shortened, the construction efficiency can be improved, and a large amount of formwork materials and labor costs are saved, reducing the overall cost. At the same time, its standardization and assembly features have powerfully promoted the industrialization of underground engineering construction, and have good application prospects and promotion value. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the cross-section of the shield tunnel station in an embodiment of the present invention; Figure 2 This is a schematic cross-sectional view of the connection node structure between the vertical components of the shield tunnel station and the tunnel lining segments in an embodiment of the present invention; Figure 3 This is a schematic diagram of the longitudinal section of the connection node structure between the vertical components of the shield tunnel station and the tunnel segment in an embodiment of the present invention; In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 1. segment; 2. vertical member; 3. platform door; 4. platform slab; 5. first reinforcing bar; 6. post-installed anchor bolt; 7. adjusting shim; 8. closed side plate; 9. second reinforcing bar; 10. post-cast concrete; 11. fixing bolt; 12. through hole. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0023] In the description of this invention, it should be understood that, unless otherwise expressly specified and limited, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0024] Furthermore, unless otherwise expressly specified and limited, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise expressly and specifically limited.

[0025] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0026] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0027] Example: Please see Figures 1-3In a preferred embodiment of the present invention, the connection node structure between the vertical components and the tunnel segments of the shield tunnel station includes a closed side plate 8 and post-cast concrete 10. The closed side plate 8, together with the tunnel segment 1 and the vertical component 2, forms a casting space. The post-cast concrete 10 is then poured into the casting space to achieve a firm connection between the tunnel segment 1 and the vertical component 2.

[0028] It is important to know that, such as Figure 1 As shown, the vertical component and segment connection node structure of the shield tunnel station in this invention is used for the connection between the segment 1 and the vertical component 2 in the shield tunnel subway station. At the same time, a platform screen door 3 and a platform plate 4 are also installed in the shield tunnel subway station. The platform plate 4 is fixedly installed at the bottom of the inner wall of the segment 1, the platform screen door 3 is set on the platform plate 4, and the vertical component 2 is set between the platform screen door 3 and the top of the inside of the segment 1. Before the construction of the platform screen door 3 and the platform plate 4, the connection between the vertical component 2 and the segment 1 needs to be carried out first.

[0029] Specifically, such as Figure 2 As shown, in the preferred embodiment of the present invention, two closed side plates 8 are provided, respectively located on the lateral sides of the vertical member 2. One end of each closed side plate 8 is fixedly connected to the vertical member 2, and the other end is fixedly connected to the inner wall of the segment 1. The two closed side plates 8, the segment 1, and the vertical member 2 enclose a casting space. Figure 2 In the specific embodiment shown, one end of the closed side plate 8 is fixedly connected to the segment 1 by a rear anchor bolt 6, and the other end is fixed to the side wall of the vertical member 2 by a fixing bolt 11.

[0030] Meanwhile, a first reinforcing bar 5 is provided on the inner wall of the segment 1, and a second reinforcing bar 9 is provided on the side of the vertical member 2 near the segment 1. One end of the first reinforcing bar 5 and one end of the second reinforcing bar 9 extend into the casting space and are welded together one by one. During welding, the first reinforcing bar 5 and the second reinforcing bar 9 can be butt-jointed or lap-jointed, and lap-jointed is preferred to ensure the connection strength of the first reinforcing bar 5 and the second reinforcing bar 9. Correspondingly, the post-cast concrete 10 is filled into the casting space by in-situ casting to further fix the segment 1 and the vertical member 2 together.

[0031] Preferably, the closed side plate 8 is an inverted L-shaped steel plate, and more preferably, the side of the closed side plate 8 closest to the segment 1 is an arc shape that matches the curvature of the inner wall of the segment 1, so that the two ends of the L-shaped steel plate can be tightly fitted to the inner wall of the segment 1 and the outer wall of the vertical member 2 respectively.

[0032] Preferably, an adjustment pad 7 is further provided between the closed side plate 8 and the tube segment 1 to ensure that the closed side plate 8 is tightly attached to the inner wall of the tube segment 1. In a specific embodiment of the present invention, the adjustment pad 7 is an EVA sponge pad, and the two sides of the EVA sponge pad are bonded to the closed side plate 8 and the tube segment 1 by epoxy resin adhesive.

[0033] Preferably, such as Figure 3 As shown, multiple through holes 12 are provided on both closed side plates 8. The multiple through holes 12 are evenly spaced along the longitudinal direction of the closed side plates 8. The through holes 12 are located on the side wall of the closed side plate 8 near the end of the segment 1 and are connected to the pouring space. In actual construction, the through holes 12 on one closed side plate 8 can be used as pouring holes to inject concrete into the pouring space through high-level grouting. The through holes 12 on the other closed side plate 8 can be used as venting holes to ensure the compactness of the post-poured concrete 10. At the same time, it can be determined whether the interior of the pouring space has been filled and compacted by observing whether concrete continues to flow out of the venting holes.

[0034] Furthermore, the present invention also relates to a construction process for a connection node structure between vertical components and tunnel segments of a shield tunneling station, used for constructing the aforementioned connection node structure between vertical components and tunnel segments of a shield tunneling station.

[0035] When the closed side plate 8 is provided with a through hole 12, the construction steps are as follows: (1) Insert the first steel bar 5 into the inner wall of the segment 1 and hoist the vertical member 2 to the design position; (2) Through holes 12 are made on the two closed side plates 8 respectively, and one closed side plate 8 is fixedly connected to the inner wall of the tube segment 1 and the outer wall of one side of the vertical member 2; (3) Weld the first reinforcing bar 5 and the second reinforcing bar 9 extending from the vertical member 2; (4) Fix the other closed side plate 8 to the inner wall of the segment 1 and the outer wall of the other side of the vertical member 2; (5) Use the through hole 12 on one of the closed side plates 8 as a pouring hole and inject concrete into the pouring space through the pouring hole; use the through hole 12 on the other closed side plate 8 as a venting hole. Stop injecting concrete when concrete continues to flow out of the venting hole. After the concrete solidifies, post-poured concrete 10 is formed, and the construction of the vertical component and segment connection node structure of the shield station is completed.

[0036] When the closed side plate 8 does not have a through hole 12, the construction steps are as follows: (1) Insert the first steel bar 5 into the inner wall of the segment 1 and hoist the vertical member 2 to the design position; (2) A closed side plate 8 is fixedly connected to the inner wall of the segment 1 and the outer wall of one side of the vertical member 2; (3) Weld the first reinforcing bar 5 and the second reinforcing bar 9 extending from the vertical member 2 together; (4) The other closed side plate 8 is movably installed on the outer wall of the other side of the vertical member 2, and the closed side plate 8 is attached to the outer wall of the vertical member 2, and a grouting gap is formed between the top of the closed side plate 8 and the inner wall of the pipe segment 1, so that the two closed side plates 8, the pipe segment 1, and the vertical member 2 form an unclosed casting space. Regarding the movable nature of the closed side plate 8 relative to the vertical member 2, during actual construction, the other closed side plate 8 can be slidably installed on the outer wall of the other side of the vertical member 2 via a sliding guide rail, or a protrusion and a groove can be matched and set on the outer wall of the closed side plate 8 corresponding to the vertical member 2; at the same time, a lifting mechanism such as a jack can be arranged at the bottom of the other closed side plate 8, so that the closed side plate 8 can be gradually lifted upward by the lifting mechanism against the bottom of the closed side plate 8 until the top of the closed side plate 8 is tightly attached to the inner wall of the segment 1.

[0037] (5) Concrete is poured into the pouring space through the grouting gap, while the other closed side plate 8 is gradually moved upward to gradually reduce the grouting gap; (6) When the other closed side plate 8 moves to be in close contact with the inner wall of the segment 1, stop moving and fix the other closed side plate 8 to the segment 1 and the vertical member 2. After the concrete solidifies, the post-cast concrete 10 is formed, and the construction of the connection node structure between the vertical member and the segment of the shield station is completed.

[0038] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A shield tunnel station vertical component and segment connecting node structure, characterized in that, This includes closed side panels and post-cast concrete; The two closed side plates are respectively disposed on the horizontal sides of the vertical member. One end of the closed side plate is fixedly connected to the vertical member, and the other end is fixedly connected to the inner wall of the segment. The two closed side plates, the segment, and the vertical member enclose the casting space. A first reinforcing bar is provided on the inner wall of the segment, and a second reinforcing bar is provided on the side of the vertical member near the segment, with one end of the first reinforcing bar and one end of the second reinforcing bar extending into the casting space; The post-cast concrete is filled into the casting space by on-site casting.

2. The shield tunnel station vertical component and segment connection node structure according to claim 1, characterized in that, The first reinforcing bar and the second reinforcing bar are welded in a one-to-one correspondence.

3. The shield tunnel station vertical component and segment connection node structure according to claim 1, characterized in that, The enclosed side plate is an inverted L-shaped steel plate.

4. The shield tunnel station vertical component and segment connection node structure according to claim 1, characterized in that, An adjustment pad is provided between the closed side plate and the tube segment to compensate for the gap between them.

5. The shield tunnel station vertical component and segment connection node structure according to claim 4, characterized in that, The adjusting pad is an EVA sponge pad, and the two sides of the EVA sponge pad are bonded to the closed side plate and the tube segment by epoxy resin adhesive.

6. The shield tunnel station vertical component and segment connection node structure according to claim 1, characterized in that, Both of the aforementioned closed side plates are provided with multiple through holes. The through holes are located on the side wall of the closed side plate near the end of the tube segment and are connected to the casting space. The through holes on one of the closed side plates are used as casting holes, and the through holes on the other closed side plate are used as venting holes.

7. A construction process for the connection node structure between vertical components and tunnel segments in a shield tunneling station, used for the construction of the connection node structure between vertical components and tunnel segments in any one of claims 1 to 5, characterized in that, Includes the following steps: (1) Insert the first steel bar into the inner wall of the segment and hoist the vertical component to the design position; (2) A closed side plate is fixedly connected to the inner wall of the segment and the outer wall of one side of the vertical component; (3) Weld the first reinforcing bar and the second reinforcing bar extending from the vertical member together; (4) The other closed side plate is movably installed on the outer wall of the other side of the vertical member, and the closed side plate is attached to the outer wall of the vertical member, and a grouting gap is formed between the top of the closed side plate and the inner wall of the segment, so that the two closed side plates, the segment, and the vertical member form an unclosed casting space. (5) Concrete is poured into the pouring space through the grouting gap, while the other closed side plate is gradually moved upward to gradually reduce the grouting gap; (6) When the other closed side plate moves to be in close contact with the inner wall of the tunnel segment, stop moving and fix the other closed side plate to the tunnel segment and vertical member. After the concrete solidifies, the post-cast concrete is formed to complete the construction of the connection node structure between the vertical member and the tunnel segment of the shield station.

8. The construction technology of the vertical component and segment connection node structure of the shield tunnel station according to claim 7, characterized in that, In step (4), another closed side plate is slidably installed on the outer wall of the other side of the vertical component via a sliding guide rail, and the lifting mechanism is placed against the bottom of the other closed side plate, and the closed side plate is gradually lifted upward by the lifting mechanism.

9. A construction process for the connection node structure between vertical components and tunnel segments in a shield tunneling station, used for the construction of the connection node structure between vertical components and tunnel segments in any one of claims 1 to 6, characterized in that, Includes the following steps: (1) Insert the first steel bar into the inner wall of the segment and hoist the vertical component to the design position; (2) Through holes are made on the two closed side plates respectively, and one closed side plate is fixedly connected to the inner wall of the segment and the outer wall of one side of the vertical component; (3) Weld the first reinforcing bar and the second reinforcing bar extending from the vertical member together; (4) Fix the other closed side plate to the inner wall of the segment and the outer wall of the other side of the vertical member; (5) Use the through hole on one of the closed side plates as the pouring hole and inject concrete into the pouring space through the pouring hole; use the through hole on the other closed side plate as the vent hole. Stop injecting concrete when concrete continues to flow out of the vent hole. After the concrete solidifies, post-pouring concrete is formed, and the construction of the vertical components and segment connection node structure of the shield station is completed.

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