Prefabricated assembly unit connecting structure in shield tunnel

Abstract

The utility model discloses a shield tunnel internal prefabricated assembly unit connecting structure which comprises a longitudinal connecting structure, a transverse connecting structure and a transverse connecting structure, the longitudinal connecting structure comprises a U-shaped steel inserting plate and a group of inserting grooves, and the inserting grooves are respectively arranged near adjacent edges of top plates of adjacent square piece units or adjacent edges of top plates of adjacent edge block units. The two end parts of the U-shaped steel inserting plate are respectively inserted into the inserting grooves and are fixed; the transverse connecting structure comprises joint bars and brackets located on the side wall portions of the square piece units, the brackets are provided with reserved through holes, upturning structures are arranged at the positions, corresponding to the brackets, of the edge block units, the upturning structures are provided with reserved blind holes, and the joint bars are sequentially inserted into the reserved through holes and the reserved blind holes and then fixed. According to the utility model, the commonly adopted bolt connection method is changed, and when dislocation exists among the segments and a certain error exists in the positioning of the internal prefabricated structure unit, the connection can still be quickly carried out, so that the purpose of convenient construction is achieved, and meanwhile, the inspection tour and the maintenance of the connecting piece during the operation and maintenance period can be avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of construction of prefabricated assembly units inside a shield tunnel, and in particular relates to a connection structure of prefabricated assembly units inside a shield tunnel. Background Art

[0002] In order to meet the industrialized construction requirements put forward by national policies, the internal structure of shield tunnels is usually prefabricated and assembled. At present, the prefabricated structural units in shield tunnels are generally connected by bolts. After investigation, it was found that the bolt connection method has many problems in construction and operation and maintenance, as follows: (1) Since there is more or less "misalignment" between the shield segments after assembly, and errors are inevitable in the positioning of the internal prefabricated structural units, continuous fine adjustments are required during the construction process to meet the requirements of smooth bolt connection; (2) During construction, the bolts need to be tightened multiple times to ensure reliable connection between the prefabricated units; (3) The bolt holes need to be sealed, and the sealing needs to be checked during operation to ensure the durability of the bolts. Utility Model Content

[0003] In view of this, the purpose of the present invention is to provide a prefabricated assembly unit connection structure inside a shield tunnel to solve the deficiencies in the prior art.

[0004] In order to achieve the above-mentioned purpose, the present invention is realized by the following technical solutions:

[0005] Provided is a connection structure for prefabricated assembly units inside a shield tunnel, wherein the prefabricated assembly units inside the shield tunnel include a mouth unit located in the middle and side block units located on both sides, including:

[0006] The longitudinal connection structure is suitable for longitudinal connection between adjacent truncated members or adjacent side block members, and comprises a U-shaped steel insert and a set of slots, wherein the slots are respectively arranged near the adjacent edges of the top plates of adjacent truncated members or adjacent edges of the top plates of adjacent side block members, and the two ends of the U-shaped steel insert are respectively inserted into the slots and fixed;

[0007] The transverse connection structure is suitable for the transverse connection between adjacent mouth-shaped unit and edge block unit, including an inserted bar and a corbel located at the side wall of the mouth-shaped unit, the corbel is provided with a reserved through hole, and the side block unit is provided with an upward flip structure at the corresponding position of the corbel, the upward flip structure is provided with a reserved blind hole, and the inserted bar is inserted into the reserved through hole and the reserved blind hole in sequence and then fixed.

[0008] For example, in the prefabricated assembly unit connection structure inside the shield tunnel, after the front and rear prefabricated assembly units are hoisted and positioned, quick-setting and quick-hardening material is poured into the slot, and the U-shaped steel insert is inserted into the slot before the material solidifies.

[0009] For example, in the prefabricated assembly unit connection structure inside the shield tunnel, the inserted bars are sequentially inserted into the reserved through holes and the reserved blind holes, and then poured with quick-setting and quick-hardening materials to fill them densely.

[0010] For example, the prefabricated assembly unit connection structure inside the shield tunnel, wherein the width of the U-shaped steel insert is smaller than the width of the slot, the depth of the U-shaped steel insert is smaller than the depth of the slot, and the inner diameter of the reserved through hole and the inner diameter of the reserved blind hole are both larger than the outer diameter of the dowel.

[0011] For example, in the prefabricated assembly unit connection structure inside the shield tunnel, there is a certain gap between the corbel and the upturned structure.

[0012] The beneficial effects of the technical solution of this utility model are:

[0013] The commonly used bolt connection method has been changed. When there is "misalignment" between the segments and a certain error in the positioning of the internal prefabricated structural units, the connection can still be made quickly, thereby facilitating construction and avoiding the inspection and maintenance of the connectors during operation and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] To further illustrate the above-mentioned purpose, structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings.

[0015] Figure 1 This is a schematic diagram of the connection structure of the prefabricated assembly units inside the shield tunnel of the preferred embodiment of the utility model;

[0016] Figure 2 for Figure 1 Cross-sectional view along the II direction;

[0017] Figure 3 for Figure 1 Middle section view along II-II direction;

[0018] Figure 4 A longitudinal cross-sectional view of the longitudinal connection structure between the mouth piece unit and the side block unit in a preferred embodiment of the present invention;

[0019] Figure 5 Another longitudinal cross-sectional view of the longitudinal connection structure between the mouth piece unit and the side block unit in a preferred embodiment of the present invention;

[0020] Figure 6 This is a plan view of the longitudinal connection structure between the mouth piece unit and the edge block unit in a preferred embodiment of the present invention;

[0021] Figure 7A longitudinal cross-sectional view of the transverse connection structure between the mouth piece unit and the edge block unit in a preferred embodiment of the present invention;

[0022] Figure 8 Another longitudinal cross-sectional view of the transverse connection structure between the mouth piece unit and the side block unit in a preferred embodiment of the present invention;

[0023] Figure 9 This is a plan view of the transverse connection structure between the mouth piece unit and the edge block unit in a preferred embodiment of the present invention;

[0024] In the figure: 1. Mouth-shaped component unit; 2. Edge block unit; 3. U-shaped steel insert; 4. Slot; 5. Dowel; 6. Corbel; 7. Reserved through hole; 8. Reserved blind hole; 9. Quick-setting and quick-hardening material. DETAILED DESCRIPTION

[0025] The terms "utility model" and "the present invention" as used in this specification are intended to refer broadly to all subject matter of this specification and any patent claims below. Statements containing these terms should not be understood to limit the subject matter described herein or to limit the meaning or scope of any patent claim below. In addition, this specification does not attempt to describe or limit the subject matter covered by any claim of any specific component, paragraph, statement or figure of this application. The subject matter should be understood with reference to the entire specification, all drawings and any claims below. The present invention may have other embodiments and be practiced or implemented in other ways. Moreover, it should be understood that the wording and terminology used herein are for illustrative purposes and should not be considered as limiting.

[0026] The details of the present invention will now be discussed with reference to the accompanying drawings which illustrate the present invention by way of example only. In the accompanying drawings, similar features or components may be marked with the same reference numerals.

[0027] The use of "including," "having," and "comprising" and variations thereof herein is intended to encompass the items listed thereafter and equivalents thereof, as well as additional items. Although reference may be made to directions such as above, below, upward, downward, rearward, bottom, top, front, and rear in describing the drawings, for convenience, reference is made relative to the drawings. These directions are not intended to literally define or limit the present invention in any manner. Furthermore, terms such as "first," "second," and "third" are used herein for descriptive purposes and are not intended to indicate or imply importance or significance.

[0028] Figures 1 to 9The present invention shows a connection structure of prefabricated assembly units inside a shield tunnel, wherein the prefabricated assembly units inside the shield tunnel include a mouth unit 1 located in the middle and side block units 2 located on both sides. In a preferred embodiment, the present invention includes a longitudinal connection structure and a transverse connection structure.

[0029] See Figure 4 、 Figure 5 and Figure 6 As shown, the longitudinal connection structure is suitable for the longitudinal connection between adjacent mouth-shaped component units 1 or the longitudinal connection between adjacent side block units 2, and specifically includes a U-shaped steel insert 3 and a group of slots 4. The slots 4 are respectively arranged near the adjacent edges of the top plates of adjacent mouth-shaped component units 1 or near the adjacent edges of the top plates of adjacent side block units 2. The two ends of the U-shaped steel insert 3 are respectively inserted into the slots 4 and fixed. The position of the slots 4 needs to avoid the position of the steel bars.

[0030] See Figure 7 、 Figure 8 and Figure 9 As shown, the transverse connection structure is suitable for the transverse connection between adjacent mouth-shaped component units 1 and side block units 2, including dowel bars 5 (i.e., steel bars) and corbels 6 located on the side walls of the mouth-shaped component units 1. The corbels 6 are provided with reserved through holes 7. An upward flip structure is provided at the corresponding positions of the side block units 2 and the corbels 6. The upward flip structure is provided with reserved blind holes 8. The dowel bars 5 are inserted into the reserved through holes 7 and the reserved blind holes 8 in sequence and then fixed.

[0031] Further, referring to the diagram, in the longitudinal connection structure, after the two prefabricated assembly units are hoisted and positioned, the quick-setting and hardening material 9 is poured into the slot 4. Before the material solidifies, the U-shaped steel insert 3 is inserted into the slot 4. After the material solidifies and reaches a certain strength, the U-shaped steel insert 3 can serve the purpose of longitudinally connecting the two adjacent units. The width of the U-shaped steel insert 3 is smaller than the width of the slot 4, and the depth of the U-shaped steel insert 3 is smaller than the depth of the slot 4. The purpose is to take into account the positioning errors of the prefabricated structural units and the misalignment during the assembly of the shield pipe segments, so as to facilitate the insertion of the U-shaped steel insert 3.

[0032] In the transverse connection structure, after the dowel rod 5 is sequentially inserted into the reserved through hole 7 and the reserved blind hole 8, the quick-setting and fast-hardening material 9 is poured in to fill it tightly. After the material solidifies and reaches a certain strength, the dowel rod 5 can serve the purpose of horizontally connecting the middle mouth unit 1 and the side block units 2 on both sides. During the operation and maintenance stage, the dowel rod 5 as a connecting piece is wrapped and covered with the quick-setting and fast-hardening material 9, which improves the durability of the connecting piece and facilitates operation and maintenance. The inner diameter of the reserved through hole 7 and the inner diameter of the reserved blind hole 8 are both larger than the outer diameter of the dowel rod 5. The size of the reserved hole can accommodate the positioning error and a certain amount of misalignment of the prefabricated structural unit, and at the same time, it is for the convenience of construction.

[0033] Furthermore, there is a certain gap between the corbel 6 and the upward structure, and the gap is filled with a quick-setting and hardening material 9.

[0034] The utility model changes the commonly used bolt connection method. When there is "misalignment" between the pipe segments and there is a certain error in the positioning of the internal prefabricated structural units, the connection can still be carried out quickly, thereby achieving the purpose of facilitating construction and avoiding the inspection and maintenance of the connecting parts during operation and maintenance.

[0035] The above are only preferred embodiments of the present invention and do not limit the implementation methods and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A shield tunnel internal prefabricated assembly unit connection structure, the shield tunnel internal prefabricated assembly unit includes a mouth unit located in the middle and side block units located on both sides, characterized in that: include: The longitudinal connection structure is suitable for longitudinal connection between adjacent truncated members or adjacent side block members, and comprises a U-shaped steel insert and a set of slots, wherein the slots are respectively arranged near the adjacent edges of the top plates of adjacent truncated members or adjacent edges of the top plates of adjacent side block members, and the two ends of the U-shaped steel insert are respectively inserted into the slots and fixed; The transverse connection structure is suitable for the transverse connection between adjacent mouth-shaped unit and edge block unit, including an inserted bar and a corbel located at the side wall of the mouth-shaped unit, the corbel is provided with a reserved through hole, and the side block unit is provided with an upward flip structure at the corresponding position of the corbel, the upward flip structure is provided with a reserved blind hole, and the inserted bar is inserted into the reserved through hole and the reserved blind hole in sequence and then fixed.

2. The prefabricated assembly unit connection structure inside a shield tunnel as claimed in claim 1, characterized in that: After the front and rear prefabricated assembly units are hoisted and positioned, quick-setting and quick-hardening material is poured into the slot, and the U-shaped steel insert is inserted into the slot before the material solidifies.

3. The prefabricated assembly unit connection structure inside a shield tunnel as claimed in claim 1, characterized in that: After the inserted bars are sequentially inserted into the reserved through holes and the reserved blind holes, quick-setting and quick-hardening materials are poured in to fill them densely.

4. The prefabricated assembly unit connection structure inside a shield tunnel as claimed in claim 1, characterized in that: The width of the U-shaped steel insert is smaller than the width of the slot, the depth of the U-shaped steel insert is smaller than the depth of the slot, and the inner diameters of the reserved through hole and the reserved blind hole are both larger than the outer diameter of the dowel.

5. The prefabricated assembly unit connection structure inside a shield tunnel as claimed in claim 1 or 4, characterized in that: There is a certain gap between the corbel and the upward-turning structure.

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