Steel cofferdam system conversion structure for staged diversion construction

Abstract

The utility model discloses a steel cofferdam system conversion structure for staged diversion construction, which belongs to the technical field of cofferdams and comprises two water stop walls which are respectively arranged on two sides of a culvert. Each switching mechanism comprises a switching wall and two connecting walls, the switching walls are arranged at the upper end of the culvert and located between the two water stop walls, one end of each connecting wall is arranged between the corresponding switching wall and the culvert in a crossing mode, and the other end of each connecting wall is connected with the corresponding water stop wall; a water stop groove is defined by the two water stop walls, the two switching mechanisms and the culvert. A closed water stop groove is formed among the water stop wall, the conversion wall, the connecting wall and the culvert, and a cofferdam water stop conversion system is formed, so that conversion of flood discharge channels in the construction period of two adjacent sections is rapidly completed, the construction efficiency is improved, the construction progress is accelerated, river closure is avoided, and the influence on a water ecosystem is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of cofferdams, in particular to a steel cofferdam system conversion structure used for phased diversion construction. Background Art

[0002] In recent years, there are more and more bridges across rivers and lakes, and large municipal water supply culverts crossing waters. When underwater components need to be constructed by dry construction, cofferdams must be used as water retaining facilities. In the construction of water conservancy projects, temporary enclosure components are also needed to build permanent water conservancy facilities. Large earth-rock cofferdams or concrete core wall earth-rock cofferdams are usually used in water conservancy projects. Their function is to prevent water and soil from entering the construction site of the building, so as to drain water in the cofferdam, excavate foundation pits, and build components.

[0003] Generally speaking, in the construction of major underwater components, the height of the cofferdam must be higher than the highest water level that may occur during the construction period. Except as part of the formal building, the cofferdam generally needs to be dismantled after use. In order to meet the needs of flood discharge, the inverted siphon cofferdam in the river channel must be constructed in stages, so a component that can stop water conversion is urgently needed to complete the conversion of flood discharge channels between stages. Utility Model Content

[0004] The purpose of the utility model is to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a steel cofferdam system conversion structure for phased diversion construction, which can form a cofferdam water-stop conversion system and quickly complete the conversion of each phase of flood discharge channels.

[0005] According to an embodiment of the utility model, a steel cofferdam system conversion structure for phased diversion construction includes two waterstop walls, which are respectively arranged on both sides of a culvert, the two waterstop walls are arranged in parallel and along the extension direction of the culvert, and the bottom of the waterstop wall is connected to the riverbed; two conversion mechanisms, the conversion mechanism includes a conversion wall and two connecting walls, the conversion wall is arranged at the upper end of the culvert, the conversion wall is located between the two waterstop walls, the conversion wall and the waterstop wall are perpendicular to each other, the two connecting walls are respectively arranged at both ends of the conversion wall, the conversion wall is connected to the corresponding waterstop wall through the connecting wall, one end of each connecting wall is spanned between the conversion wall and the culvert, and the other end is connected to the corresponding waterstop wall, and the connecting wall is used to block the gap; the two waterstop walls, the two conversion mechanisms and the culvert are enclosed to form a waterstop groove.

[0006] A steel cofferdam system conversion structure for phased diversion construction according to an embodiment of the utility model has at least the following beneficial effects: a closed waterstop groove is formed between the waterstop wall, the conversion wall, the connecting wall and the culvert, forming a cofferdam waterstop conversion system, thereby realizing the rapid completion of the conversion of the flood discharge channel during the construction period of two adjacent sections, while improving construction efficiency and accelerating the construction process, avoiding river interception and reducing the impact on the water ecosystem and water resource supply.

[0007] According to some embodiments of the present utility model, the conversion mechanism further includes a fixing seat, which is arranged at the bottom of the conversion wall and connected to the culvert, and is used to enhance the stability of the conversion wall.

[0008] According to some embodiments of the present invention, the conversion mechanism further includes a plurality of reinforcement members, which are horizontally arranged and located at an end of the conversion wall away from the water stop groove.

[0009] According to some embodiments of the utility model, a diagonal bracing mechanism is further included, wherein the diagonal bracing mechanism is connected to the water stop wall, and the diagonal bracing mechanism is connected to the conversion mechanism, and the diagonal bracing mechanism is used to enhance the stability of the structure.

[0010] According to some embodiments of the utility model, the diagonal brace mechanism includes multiple diagonal brace assemblies, which are horizontally arranged, one end of the diagonal brace assembly is connected to the water stop wall, and the other end is connected to the conversion wall, and the multiple diagonal brace assemblies are evenly distributed in the vertical direction.

[0011] According to some embodiments of the utility model, the diagonal bracing assembly includes: a first purlin, which is arranged at one end of the water stop wall close to the water stop groove, and the first purlin is arranged horizontally; a second purlin, which is arranged at one end of the transfer wall away from the water stop groove, and the second purlin is arranged horizontally; a plurality of diagonal bracing members, one end of each diagonal bracing member is connected to the first purlin, and the other end is connected to the second purlin, the diagonal bracing members are arranged horizontally, and the first purlin, the second purlin and the diagonal bracing members are combined to form a triangle.

[0012] According to some embodiments of the utility model, it also includes a top-up mechanism, which is arranged between the two conversion mechanisms, located in the water-stop groove, and arranged along the extension direction of the culvert. The top-up mechanism is used to enhance the overall stiffness between the two conversion mechanisms.

[0013] According to some embodiments of the utility model, the top-to-top mechanism includes a plurality of top-to-top components, which are horizontally arranged between two conversion walls, and a plurality of diagonal braces are evenly distributed in the vertical direction, and each top-to-top component is arranged on the same horizontal plane corresponding to a diagonal brace.

[0014] According to some embodiments of the utility model, the top assembly includes: two third purlins, the two third purlins are respectively arranged on two conversion walls, the third purlins are located in the water stop groove, and the third purlins are horizontally arranged; a top member, one end of the top member is connected to one of the third purlins, and the other end is connected to the other third purlin, and the top member is horizontally arranged and perpendicular to the conversion wall.

[0015] According to some embodiments of the utility model, the water stop wall includes a plurality of steel pipe piles, and the plurality of steel pipe piles are arranged along the extension direction of the culvert to form the water stop wall, and the conversion wall is a steel sheet pile.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0018] Figure 1 It is a plan view of a steel cofferdam system conversion structure for phased diversion construction according to an embodiment of the utility model;

[0019] Figure 2 for Figure 1 Cross-section of the middle culvert;

[0020] Figure 3 for Figure 1 Sectional view of the transfer wall;

[0021] Figure 4 for Figure 1 Section view of the connecting wall.

[0022] Reference numerals:

[0023] Water stop wall 100, steel pipe pile 110;

[0024] Conversion mechanism 200, conversion wall 210, connecting wall 220, fixing seat 230, reinforcement member 240;

[0025] Stop water tank 300;

[0026] The diagonal bracing mechanism 400, the diagonal bracing assembly 410, the first surrounding purlin 411, the second surrounding purlin 412, and the diagonal bracing member 413; the top-up mechanism 500, the top-up assembly 510, the third surrounding purlin 511, and the top-up member 512;

[0027] Culvert 10. DETAILED DESCRIPTION

[0028] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0029] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0030] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a first or second description, it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0031] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0032] refer to Figures 1 to 4 A steel cofferdam system conversion structure for phased diversion construction according to an embodiment of the utility model is described.

[0033] like Figures 1 to 4As shown, a steel cofferdam system conversion structure for phased diversion construction includes two water stop walls 100, which are respectively arranged on both sides of a culvert 10, the two water stop walls 100 are arranged in parallel and along the extension direction of the culvert 10, and the bottom of the water stop wall 100 is connected to the riverbed; two conversion mechanisms 200, the conversion mechanism 200 includes a conversion wall 210 and two connecting walls 220, the conversion wall 210 is arranged at the upper end of the culvert 10, and the conversion wall 210 is located between the two water stop walls 100. The conversion wall 210 and the water stop wall 100 are perpendicular to each other, and two connecting walls 220 are respectively arranged at the two ends of the conversion wall 210. The conversion wall 210 is connected to the corresponding water stop wall 100 through the connecting wall 220. One end of each connecting wall 220 spans between the conversion wall 210 and the culvert 10, and the other end is connected to the corresponding water stop wall 100. The connecting wall 220 is used to block the gap; the two water stop walls 100, the two conversion mechanisms 200 and the culvert 10 enclose a water stop groove 300.

[0034] like Figure 1 and Figure 2 As shown, the water stop wall 100 extends in the left-right direction and extends downward to connect with the riverbed. Two water stop walls 100 are respectively arranged on the front and rear sides of the culvert 10. Two transfer walls 210 are arranged in parallel between the two water stop walls 100. The transfer wall 210 and the water stop wall 100 are perpendicular to each other. The transfer wall 210 is connected to the water stop wall 100 through the connecting wall 220. Specifically, the transfer wall 210 is connected to the water stop wall 100 at one end away from the culvert 10, and the other end is longitudinally arranged between the culvert 10 and the transfer wall 210 to block the gap between the water stop wall 100 and the transfer wall 210 and the culvert 10. Thus, a closed water stop groove 300 is formed between the water stop wall 100, the transfer wall 210, the connecting wall 220 and the culvert 10, forming a cofferdam water stop conversion system, thereby realizing the rapid completion of the conversion of the flood discharge channel during the construction period of two adjacent sections, while improving the construction efficiency and accelerating the construction process, avoiding the interception of the river and reducing the impact on the water ecosystem and water resources supply.

[0035] Furthermore, the gaps between the water stop wall 100, the connecting wall 220 and the culvert 10 are sealed for a second time by pouring concrete.

[0036] In some specific embodiments of the present invention, the conversion mechanism 200 further includes a fixing seat 230, which is disposed at the bottom of the conversion wall 210 and connected to the culvert 10. The fixing seat 230 is used to enhance the stability of the conversion wall 210. Figure 1 As shown, the fixing seat 230 is arranged at the lower end of the conversion wall 210. Specifically, the fixing seat 230 is two tooth walls arranged at the bottom of the conversion wall 210. The two tooth walls are symmetrically arranged on the left and right sides of the conversion wall 210.

[0037] In some specific embodiments of the present invention, the conversion mechanism 200 further includes a plurality of reinforcement members 240, which are arranged horizontally and are located at one end of the conversion wall 210 away from the water stop groove 300. Figure 2 and Figure 3 As shown, the reinforcement 240 extends in the front-to-back direction. Specifically, the reinforcement 240 is located at the end of the transfer wall 210 opposite to the water stop groove 300 and is horizontally arranged along the extension direction of the transfer wall 210 to enhance the structural rigidity of the transfer wall 210.

[0038] In some specific embodiments of the present invention, a diagonal bracing mechanism 400 is further included. The diagonal bracing mechanism 400 is connected to the water stop wall 100 , and the diagonal bracing mechanism 400 is connected to the conversion mechanism 200 . The diagonal bracing mechanism 400 is used to enhance the stability of the structure.

[0039] In some specific embodiments of the present invention, the diagonal brace mechanism 400 includes a plurality of diagonal brace assemblies 410, which are arranged horizontally, one end of the diagonal brace assemblies 410 is connected to the water stop wall 100, and the other end is connected to the transfer wall 210, and the plurality of diagonal brace assemblies 410 are evenly distributed in the vertical direction. Figure 1 As shown, on the same horizontal plane, two diagonal brace components 410 are provided on the left side of the water stop groove 300, and two diagonal brace components 410 are provided on the right side of the water stop groove 300. Figure 2 As shown, two layers of diagonal brace assemblies 410 are arranged on the left side of the water stop groove 300, and two layers of diagonal brace assemblies 410 are arranged on the right side of the water stop groove 300. The diagonal brace assemblies 410 on both sides of the water stop groove 300 are symmetrically arranged to form eight support ends to enhance the structural stability between the water stop wall 100 and the transfer wall 210.

[0040] In some specific embodiments of the present invention, the diagonal bracing assembly 410 includes: a first purlin 411, which is arranged at one end of the water stop wall 100 close to the water stop groove 300, and the first purlin 411 is arranged horizontally; a second purlin 412, which is arranged at one end of the conversion wall 210 away from the water stop groove 300, and the second purlin 412 is arranged horizontally; a plurality of diagonal bracing members 413, one end of each diagonal bracing member 413 is connected to the first purlin 411, and the other end is connected to the second purlin 412, and the diagonal bracing members 413 are arranged horizontally.

[0041] like Figures 1 to 4As shown, the first purlin 411 is horizontally arranged in the left-right direction, the second purlin 412 is horizontally arranged in the front-back direction, and the first purlin 411 and the second purlin 412 are located on the same horizontal plane. Correspondingly, one end of the diagonal brace 413 is connected to the first purlin 411, and the other end is connected to the second purlin 412. The diagonal brace 413, the first purlin 411 and the second purlin 412 connected to each other are located on the same horizontal plane and enclose a stable triangle. Specifically, multiple first purlins 411 located on the same horizontal line are connected in the left-right direction. Similarly, multiple second purlins 412 located on the same horizontal line are connected in the front-back direction. It should be noted that multiple first purlins 411 located on the same horizontal line or multiple second purlins 412 located on the same horizontal line can also be arranged as a whole.

[0042] In some specific embodiments of the utility model, a top-up mechanism 500 is also included. The top-up mechanism 500 is arranged between the two conversion mechanisms 200. The top-up mechanism 500 is located in the water stop groove 300. The top-up mechanism 500 is arranged along the extension direction of the culvert 10. The top-up mechanism 500 is used to enhance the overall stiffness between the two conversion mechanisms 200.

[0043] In some specific embodiments of the present invention, the top-up mechanism 500 includes a plurality of top-up assemblies 510, which are arranged horizontally and between two conversion walls 210. A plurality of diagonal braces 413 are evenly distributed along the vertical direction, and each top-up assembly 510 is arranged on the same horizontal plane as a diagonal brace 413. Figure 1 As shown, on the same horizontal plane, five top-to-top assemblies 510 are arranged in the water stop groove 300, such as Figure 3 As shown, two layers of top-jointing assemblies 510 are arranged in the water stop groove 300 , thereby forming ten top-jointing assemblies to enhance the overall rigidity between the two transfer walls 210 .

[0044] In some specific embodiments of the present invention, the top assembly 510 includes: two third purlins 511, the two third purlins 511 are respectively arranged on two conversion walls 210, the third purlins 511 are located in the water stop groove 300, and the third purlins 511 are horizontally arranged; a top member 512, one end of the top member 512 is connected to one of the third purlins 511, and the other end is connected to the other third purlin 511, and the top member 512 is horizontally arranged and perpendicular to the conversion wall 210.

[0045] like Figures 1 to 4As shown, two third purlins 511 are horizontally arranged along the front-to-back direction, one of the third purlins 511 is arranged on the left transfer wall 210, and the other third purlin 511 is arranged on the right transfer wall 210, and the top member 512 is arranged between the two third purlins 511 and is perpendicular to the transfer wall 210. Specifically, the plurality of third purlins 511 located on the same horizontal line are sequentially connected along the front-to-back direction, and it should be noted that the plurality of third purlins 511 located on the same horizontal line can also be arranged as a whole.

[0046] In some specific embodiments of the present invention, the water stop wall 100 includes a plurality of steel pipe piles 110 , which are arranged along the extension direction of the culvert 10 to form the water stop wall 100 , and the transfer wall 210 is a steel sheet pile.

[0047] The following is a specific example to illustrate the steel cofferdam system conversion structure used for phased diversion construction:

[0048] Two rows of steel pipe piles 110 extend in the left-right direction to form two parallel water stop walls 100, each steel pipe pile 110 has a total length of 22.5m, wherein the bottom elevation of the steel pipe pile 110 is -20m. Two rows of 9.2m Larsen IV steel sheet piles extend in the front-back direction to form two parallel transfer walls 210, wherein the 9.2m Larsen IV steel sheet piles are arranged above the culvert 10, wherein the height of the steel sheet piles is 8.8m and the top of the steel sheet piles is flush with the top of the steel pipe piles 110. Two rows of 18m Larsen IV steel sheet piles are arranged at the front and rear ends of the conversion wall 210 to form a connecting wall 220. The 18m Larsen IV steel sheet piles are arranged between the steel pipe piles 110 and the 9.2m Larsen IV steel sheet piles. The bottom elevation of the 18m Larsen IV steel sheet piles is -15.5m. The 18m Larsen IV steel sheet piles are connected to the steel pipe piles 110 and the 9.2m Larsen IV steel sheet piles by full welding of steel plates. At the same time, concrete pouring is used for secondary sealing in the gap formed by the steel pipe piles 110, the 18m Larsen IV steel sheet piles and the culvert 10.

[0049] Furthermore, tooth walls with a size of 400 mm × 800 mm are symmetrically arranged on both sides of the bottom of the two 9.2 m Larsen IV steel sheet piles. The tooth walls extend in the front-to-back direction and their lengths correspond to the 9.2 m Larsen IV steel sheet piles.

[0050] Furthermore, two layers of top-joint assemblies 510 are arranged between two 9.2m Larsen IV steel sheet piles, wherein each layer is provided with five top-joint assemblies 510, and the five top-joint assemblies 510 are evenly arranged in sequence along the front-to-back direction on the inner wall of the water stop groove 300. Specifically, the third purlin 511 is a whole double-jointed H400 steel purlin arranged along the front-to-back direction, and the top-joint 512 is a 2.8m long 400H steel top-joint.

[0051] Further, on the same horizontal plane, two layers of diagonal brace assemblies 410 are arranged between the water stop wall 100 and the connecting wall 220 on the left, and each layer is provided with diagonal brace assemblies 410 on both sides. Correspondingly, two layers of diagonal brace assemblies 410 are arranged between the water stop wall 100 and the connecting wall 220 on the right, and each layer is provided with diagonal brace assemblies 410 on both sides. Specifically, 20mm thick steel plates are used to reinforce the connection between the steel pipe and the first purlin 411, and between the steel pipe and the second purlin 412. Both the first purlin 411 and the second purlin 412 are double-joined H400 steel purlins, wherein the first purlin 411 on the same horizontal line is formed by splicing eight sections of steel purlins, and the length of the second purlin 412 on the same horizontal line is 17.2m. In this specific embodiment, two diagonal bracing members 413 are provided in one diagonal bracing assembly 410 . The two diagonal bracing members 413 are 7.727 m and 10.192 m long respectively, and the two diagonal bracing members 413 together with the first surrounding purlin 411 and the second surrounding purlin 412 form an isosceles right triangle.

[0052] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A steel cofferdam system conversion structure for phased diversion construction, characterized in that: include: Two water stop walls (100), the two water stop walls (100) are respectively arranged on both sides of the culvert (10), the two water stop walls (100) are arranged in parallel and along the extension direction of the culvert (10), and the bottom of the water stop wall (100) is connected to the riverbed; Two conversion mechanisms (200), the conversion mechanisms (200) comprising a conversion wall (210) and two connecting walls (220), the conversion wall (210) being arranged at the upper end of the culvert (10), the conversion wall (210) being located between the two water stop walls (100), the conversion wall (210) and the water stop walls (100) being perpendicular to each other, the two connecting walls (220) being arranged at the two ends of the conversion wall (210), the conversion wall (210) being connected to the corresponding water stop wall (100) via the connecting walls (220), one end of each connecting wall (220) being arranged between the conversion wall (210) and the culvert (10), and the other end being connected to the corresponding water stop wall (100), the connecting walls (220) being used for blocking the gap; The two water stop walls (100), the two conversion mechanisms (200) and the culvert (10) enclose a water stop groove (300).

2. A steel cofferdam system conversion structure for phased diversion construction according to claim 1, characterized in that: The conversion mechanism (200) further comprises a fixing seat (230), wherein the fixing seat (230) is arranged at the bottom of the conversion wall (210), the fixing seat (230) is connected to the culvert (10), and the fixing seat (230) is used to enhance the stability of the conversion wall (210).

3. A steel cofferdam system conversion structure for phased diversion construction according to claim 1, characterized in that: The conversion mechanism (200) further comprises a plurality of reinforcement members (240), wherein the reinforcement members (240) are arranged horizontally and are located at an end of the conversion wall (210) away from the water stop groove (300).

4. A steel cofferdam system conversion structure for phased diversion construction according to claim 2, characterized in that: It also comprises a diagonal bracing mechanism (400), wherein the diagonal bracing mechanism (400) is connected to the water stop wall (100), the diagonal bracing mechanism (400) is connected to the conversion mechanism (200), and the diagonal bracing mechanism (400) is used to enhance the stability of the structure.

5. A steel cofferdam system conversion structure for phased diversion construction according to claim 4, characterized in that: The diagonal bracing mechanism (400) comprises a plurality of diagonal bracing assemblies (410), wherein the diagonal bracing assemblies (410) are arranged horizontally, one end of the diagonal bracing assembly (410) is connected to the water stop wall (100), and the other end is connected to the conversion wall (210), and the plurality of diagonal bracing assemblies (410) are evenly distributed in the vertical direction.

6. A steel cofferdam system conversion structure for phased diversion construction according to claim 5, characterized in that: The diagonal brace assembly (410) comprises: a first purlin (411), the first purlin (411) being arranged at one end of the water stop wall (100) close to the water stop groove (300), and the first purlin (411) being arranged horizontally; A second purlin (412), wherein the second purlin (412) is arranged at one end of the conversion wall (210) away from the water stop groove (300), and the second purlin (412) is arranged horizontally; A plurality of diagonal bracing members (413), one end of each of the diagonal bracing members (413) is connected to the first surrounding purlin (411), and the other end is connected to the second surrounding purlin (412), the diagonal bracing members (413) are arranged horizontally, and the first surrounding purlin (411), the second surrounding purlin (412) and the diagonal bracing members (413) are enclosed to form a triangle.

7. A steel cofferdam system conversion structure for phased diversion construction according to claim 6, characterized in that: It also comprises a top-up mechanism (500), wherein the top-up mechanism (500) is arranged between the two conversion mechanisms (200), the top-up mechanism (500) is located in the water stop groove (300), the top-up mechanism (500) is arranged along the extension direction of the culvert (10), and the top-up mechanism (500) is used to enhance the overall rigidity between the two conversion mechanisms (200).

8. A steel cofferdam system conversion structure for phased diversion construction according to claim 7, characterized in that: The top-to-top mechanism (500) comprises a plurality of top-to-top components (510), the top-to-top components (510) are arranged horizontally, the top-to-top components (510) are arranged between two of the conversion walls (210), a plurality of diagonal bracing members (413) are evenly distributed along the vertical direction, and each of the top-to-top components (510) is arranged corresponding to one of the diagonal bracing members (413) on the same horizontal plane.

9. A steel cofferdam system conversion structure for phased diversion construction according to claim 7, characterized in that: The top assembly (510) includes: Two third purlins (511), the two third purlins (511) are respectively arranged on the two conversion walls (210), the third purlins (511) are located in the water stop groove (300), and the third purlins (511) are arranged horizontally; A top member (512), one end of which is connected to one of the third purlins (511), and the other end of which is connected to another of the third purlins (511), and the top member (512) is horizontally arranged and perpendicular to the conversion wall (210).

10. The steel cofferdam system conversion structure for phased diversion construction according to claim 1, characterized in that: The water stop wall (100) comprises a plurality of steel pipe piles (110), and the plurality of steel pipe piles (110) are arranged along the extension direction of the culvert (10) to form the water stop wall (100), and the transfer wall (210) is a steel sheet pile.

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