Prefabricated box culvert and shield segment connecting mechanism

Abstract

The utility model discloses a prefabricated assembly type box culvert and shield segment connecting mechanism which comprises fixing plates pre-buried in a box culvert and a connector pre-buried in a shield segment, the fixing plates are connected with first outgoing reinforcing steel bars, the connector is connected with second outgoing reinforcing steel bars, the fixing plates are distributed on the two sides of the box culvert, and the first outgoing reinforcing steel bars and the second outgoing reinforcing steel bars are connected with the connector. Notches are formed in the two sides of the box culvert, the first connecting-out steel bars and the second connecting-out steel bars extend into the notches, and concrete is poured into the notches. Compared with the prior art, the connecting mechanism is simple in structure and easy to manufacture, the first connecting-out reinforcing steel bar is firmly connected in the box culvert through the pre-buried fixing plate, the second connecting-out reinforcing steel bar is firmly connected in the shield segment through the pre-buried connector, and then the first connecting-out reinforcing steel bar and the second connecting-out reinforcing steel bar are connected into a whole through concrete at the notch. And the anti-sliding safety coefficient of the component is effectively improved. And the connectors are arranged, so that construction of the shield segment is not affected, and later connection of the second outgoing reinforcing steel bars is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel construction, in particular to a prefabricated assembled box culvert and shield segment connection mechanism. Background Art

[0002] With the improvement of the degree of engineering mechanization in the domestic infrastructure industry, municipal engineering projects such as municipal road tunnels, large power tunnels, large drainage pipelines, urban integrated pipelines, etc. have begun to gradually promote the shield construction technology. There are more and more shield construction tunnels. Different from the common rail transit shield tunnels in the past, municipal engineering shield tunnels often need to construct secondary structures inside the shield tunnel. The secondary structure is most convenient to use prefabricated assembled box culvert components. Prefabricated box culverts are generally placed directly on the shield tunnel structure surface. However, the contact surface between the secondary structure and the shield tunnel segment is a structural arc surface. In the relevant projects that have been implemented, the assembled box culvert increases the anti-slip force of the component by planting reinforcement at the end. This method causes great damage to the shield segment and destroys the integrity of the main load-bearing structure. In addition, the on-site construction quality is difficult to control and has certain construction risks. Utility Model Content

[0003] 1. Technical issues to be resolved

[0004] Based on this, the utility model proposes a prefabricated assembled box culvert and shield segment connection mechanism to solve the problem that the existing reinforcement embedding method causes great damage to the shield segment.

[0005] (II) Technical solution

[0006] In order to overcome the above-mentioned problems or at least partially solve the above-mentioned problems, the utility model provides a prefabricated assembled box culvert and shield segment connection mechanism, including a fixing plate pre-buried in the box culvert and a connector pre-buried in the shield segment, the fixing plate is connected to a first lead-out steel bar, the connector is connected to a second lead-out steel bar, the fixing plates are distributed on both sides of the box culvert, notches are provided on both sides of the box culvert, the first lead-out steel bar and the second lead-out steel bar extend into the notches, and concrete is poured in the notches.

[0007] Preferably, the second lead-out steel bar is threadedly connected to the connector.

[0008] Preferably, a second fixing steel bar is provided in the shield segment, and the second fixing steel bar is threadedly connected to the connector.

[0009] Preferably, the second fixed steel bar is fixedly connected to the steel cage in the shield segment.

[0010] Preferably, a lap steel bar is fixed between two of the second fixing steel bars.

[0011] Preferably, the end of the second fixing steel bar away from the connector is curved.

[0012] Preferably, one end of the second steel bar extending into the notch and one end of the first steel bar extending into the notch are both curved.

[0013] Preferably, the first lead-out steel bars and the second lead-out steel bars are cross-distributed.

[0014] Preferably, two first fixed steel bars are fixed on the fixed plate inside the box culvert.

[0015] Preferably, one end of the first fixing steel bar away from the fixing plate is curved.

[0016] (III) Beneficial effects

[0017] The prefabricated assembled box culvert and shield segment connection mechanism of the utility model has the following advantages: the connection mechanism of the utility model has a simple structure and is easy to manufacture. The first lead-out steel bar is firmly connected in the box culvert through the pre-buried fixing plate, and the second lead-out steel bar is firmly connected in the shield segment through the pre-buried connector, and then connected into a whole through the concrete at the notch, which effectively improves the anti-slip safety factor of the component and does not damage the shield segment. The setting of the connector does not affect the construction of the shield segment and is also convenient for the later connection of the second lead-out steel bar. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The features and advantages of the present invention will be more clearly understood by referring to the accompanying drawings, which are schematic and should not be construed as limiting the present invention in any way. In the accompanying drawings:

[0019] Figure 1 It is a schematic diagram of the structure of the utility model;

[0020] Figure 2 It is a partial structural schematic diagram of the utility model;

[0021] Figure 3 It is a structural schematic diagram of the connection mechanism of the utility model at the shield segment;

[0022] Figure 4 It is a structural schematic diagram of the connecting mechanism of the utility model at the box culvert.

[0023] Description of reference numerals:

[0024] 1. Box culvert, 2. Shield segment, 3. Fixed plate, 4. Connector, 5. First lead-out steel bar, 6. Second lead-out steel bar, 7. Second fixed steel bar, 8. Overlap steel bar, 9. First fixed steel bar, 11. Steel cage, 100. Notch, 111. Tie bar. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation of the utility model is described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific implementation disclosed below.

[0026] Refer to the attached Figure 1 and attached Figure 2 The present embodiment provides a prefabricated assembled box culvert and shield segment connection mechanism, including a fixing plate 3 pre-buried in the box culvert 1 and a connector 4 pre-buried in the shield segment 2, the fixing plate 3 is connected with a first lead-out steel bar 5, specifically, the first lead-out steel bar 5 is welded to the fixing plate 3. The connector 4 is connected with a second lead-out steel bar 6, the fixing plates 3 are distributed on both sides of the box culvert 1, and notches 100 are provided on both sides of the box culvert 1, the first lead-out steel bar 5 and the second lead-out steel bar 6 extend into the notch 100, and concrete is poured in the notch 100, so that the first lead-out steel bar 5 and the second lead-out steel bar 6 are connected together.

[0027] An implementation manner of connecting the second lead-out steel bar 6 to the connector 4: the second lead-out steel bar 6 is threadedly connected to the connector 4.

[0028] As another embodiment of the present invention: Figure 3 A second fixing steel bar 7 is provided in the shield segment 2, and the second fixing steel bar 7 is threadedly connected to the connector 4. This arrangement is beneficial to improving the firmness of the connection between the connector 4 and the shield segment 2.

[0029] As another embodiment of the present invention: the second fixed steel bar 7 is fixedly connected to the steel cage 11 in the shield segment 2. Specifically, the steel cage 11 includes a tension bar 111 and a stress steel bar. A row of stress steel bars are respectively distributed on the inner and outer sides of the shield segment 2. The two ends of the tension bar 111 are respectively connected to two stress steel bars. The second fixed steel bar 7 is fixed to the tension bar 111.

[0030] As another embodiment of the present invention: a lap steel bar 8 is fixed between the two second fixing steel bars 7, so that the two connectors 4 are fixed together.

[0031] As another implementation mode of the present utility model: one end of the second fixing steel bar 7 away from the connector 4 is bent, and this arrangement is beneficial to improving the firmness of the second fixing steel bar 7 and the shield segment 2.

[0032] As another embodiment of the present invention: one end of the second lead-out steel bar 6 extending into the notch 100 and one end of the first lead-out steel bar 5 extending into the notch 100 are both curved. This arrangement makes the second lead-out steel bar 6 and the first lead-out steel bar 5 more firmly connected in concrete.

[0033] As another implementation mode of the present utility model: the first lead-out steel bars 5 and the second lead-out steel bars 6 are cross-distributed, which further improves the firmness of the connection between the shield segment 2 and the box culvert 1 .

[0034] As another embodiment of the present invention: Figure 4 Two first fixing steel bars 9 are fixed on the fixing plate 3 inside the box culvert 1 . This arrangement is beneficial to improving the firmness of the connection between the fixing plate 3 and the box culvert 1 .

[0035] As another implementation mode of the present utility model: one end of the first fixing steel bar 9 away from the fixing plate 3 is bent, so as to further improve the firmness of the connection between the fixing plate 3 and the box culvert 1 .

[0036] Specifically, there are two first lead-out steel bars 5 fixed on the fixing plate 3 .

[0037] Specifically, the fixing plate 3 is a steel plate.

[0038] The construction process of the connecting mechanism of the utility model is as follows:

[0039] The first step: two steel bar connectors 4 are embedded in advance during the manufacturing process of the shield segment 2, and the second fixed steel bar 7 is placed at the lower end of the connector 4. The second fixed steel bars 7 on the two connectors 4 are connected by overlapping steel bars 8, and the second fixed steel bars 7 are connected to the tension bars 111, so that the connector 4 can be fixed on the steel cage 11, and a cover is placed on the upper end of the connector 4 to prevent concrete from entering the connector 4 during the casting of the shield segment 2.

[0040] In the second step, the factory prefabricates the assembled box culvert 1, reserves gaps 100 on both sides of the box culvert 1, embeds steel plates at the gaps 100, and welds two first lead-out steel bars 5 on the surface of the steel plates.

[0041] The third step is to assemble shield segment 2 according to normal procedures.

[0042] The fourth step is to hoist the prefabricated assembled box culvert 1 into place.

[0043] The fifth step is to take out the cover at the upper end of the connector 4 embedded in the pipe segment, and screw the threaded second lead-out steel bar 6 into the connector 4.

[0044] The sixth step is to adjust the angle between the second lead-out steel bar 6 on the connector 4 and the first lead-out steel bar 5 on the embedded steel plate so that they are mutually anchored.

[0045] Step 7: Pour concrete at the gap 100 and level it, and wait for the concrete to solidify.

[0046] The connection mechanism of the utility model has a simple structure and is easy to manufacture. The first lead-out steel bar 5 is firmly connected in the box culvert 1 through the pre-buried fixing plate 3, and the second lead-out steel bar 6 is firmly connected in the shield segment 2 through the pre-buried connector 4, and then connected into a whole through the concrete at the notch 100, which effectively improves the anti-slip safety factor of the component. The setting of the connector 4 does not affect the construction of the shield segment 2, and is also convenient for the later connection of the second lead-out steel bar 6.

[0047] Finally, the method of this application is only a preferred implementation scheme and is not intended to limit the protection scope of the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

[0048] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A prefabricated box culvert and shield segment connection mechanism, characterized in that: It includes a fixing plate embedded in the box culvert and a connector embedded in the shield segment, the fixing plate is connected to a first lead-out steel bar, the connector is connected to a second lead-out steel bar, the fixing plates are distributed on both sides of the box culvert, and notches are provided on both sides of the box culvert, the first lead-out steel bar and the second lead-out steel bar extend into the notches, and concrete is poured in the notches.

2. The prefabricated box culvert and shield segment connection mechanism according to claim 1 is characterized in that: The second lead-out steel bar is threadedly connected to the connector.

3. The prefabricated box culvert and shield segment connection mechanism according to claim 2 is characterized in that: A second fixing steel bar is provided in the shield segment, and the second fixing steel bar is threadedly connected to the connector.

4. The prefabricated box culvert and shield segment connection mechanism according to claim 3 is characterized in that: The second fixed steel bar is fixedly connected to the steel cage in the shield segment.

5. The prefabricated box culvert and shield segment connection mechanism according to claim 4 is characterized in that: A lap steel bar is fixed between the two second fixing steel bars.

6. The prefabricated box culvert and shield segment connection mechanism according to claim 5 is characterized in that: One end of the second fixing steel bar away from the connector is bent.

7. The prefabricated box culvert and shield segment connection mechanism according to claim 6 is characterized in that: One end of the second lead-out steel bar extending into the notch and one end of the first lead-out steel bar extending into the notch are both curved.

8. The prefabricated box culvert and shield segment connection mechanism according to claim 7 is characterized in that: The first lead-out steel bars and the second lead-out steel bars are cross-distributed.

9. The prefabricated box culvert and shield segment connection mechanism according to claim 1, characterized in that: The fixing plate is provided with two first fixing steel bars fixed inside the box culvert.

10. The prefabricated box culvert and shield segment connection mechanism according to claim 9, characterized in that: One end of the first fixing steel bar away from the fixing plate is bent.

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