A construction method for modular jacking of double-hole rectangular frame box culverts

Abstract

The present invention relates to a modular jacking construction method for a double-hole rectangular frame box culvert, comprising the following steps: S10. Force analysis of the double-hole frame box culvert to obtain bending moment and shear force information; S20. Determination of the distance between the bending moment zero point and the side walls and middle wall; S30. Determination of the distance between the shear force zero point and the side walls and middle wall; S40. Splitting the double-hole frame box culvert longitudinally based on the bending moment zero point and the shear force zero point; S50. Installation of post-cast strips on the double-hole frame box culvert; S60. Installation of steel bar connectors and steel edge rubber waterstops on the double-hole frame box culvert; S70. Arrangement of temporary beam foundations and piers, and erection of temporary beams; S80. Installation of a half-hole box culvert and provision of temporary rigid supports; S90. Installation of the remaining box culverts; S100. Finalization of the double-hole frame box culvert construction; and S110. Completion of construction. The present invention has the beneficial effect of rationally splitting the double-hole frame box culvert.

Description

Technical Field

[0001] The invention relates to the technical field of frame box culvert jacking construction, and in particular to a construction method for jacking a double-hole rectangular frame box culvert in a modular manner. Background Art

[0002] D-type temporary beams are suitable for bridge and culvert construction on existing lines or in stations. They are easy to transport and disassemble, and are suitable for single-track, double-track, straight, and curved lines, with a speed limit of up to 60 km / h. The temporary beams are available in four spans: D12, D16, D20, and D24, suitable for bridge and culvert construction of various spans. The use of D-type temporary beams to overhead the line significantly increases train speed. However, due to transportation department regulations, the slow speed of trains during construction must not be lower than 45 km / h. Therefore, the use of D-type temporary beams greatly reduces the impact of bridge and roadbed construction on rail transportation, increases the safety and reliability of overhead equipment, improves train speed, and simplifies construction procedures.

[0003] In the construction of box culverts under railways, D-type construction beams are generally used to erect the tracks within the jacking range to ensure the operation of trains.

[0004] The longest D-type temporary beam currently on the market is the D24, with a span of 24.5 meters, which is sufficient for conventional single-span box culvert jacking. However, the existing D-type temporary beam span is insufficient for jacking double-span frame box culverts on four-lane or six-lane bidirectional railways. Increasing the span of the D-type temporary beam would make it difficult to control the deflection of the D-type temporary beam and the deformation of the railway tracks during construction, increasing the risk to railway operations.

[0005] Therefore, it is very necessary to provide a construction method for a modular double-hole rectangular frame box culvert to solve the above technical problems. Summary of the Invention

[0006] The embodiment of the present invention provides a construction method for a double-hole rectangular frame box culvert with modular jacking, which can solve the problems in the related art.

[0007] On the one hand, the embodiment of the present invention provides a construction method for modular jacking of double-hole rectangular frame box culverts.

[0008] The following steps are involved:

[0009] S10. Force analysis of the double-hole frame box culvert to obtain the bending moment and shear force information of the top and bottom plates of the double-hole frame box culvert;

[0010] S20. Determine the distance between the bending moment zero point and the side and center walls of the double-hole frame box culvert top and bottom plates;

[0011] S30. Determine the distance between the shear zero point and the side and center walls of the double-hole frame box culvert top and bottom plates;

[0012] S40. Split the double-hole frame box culvert longitudinally based on the bending moment zero point and the shear force zero point into a half-hole box culvert and a remaining box culvert;

[0013] S50. Installation of post-cast strips on double-hole frame box culverts;

[0014] S60. Installation of steel bar connectors and steel edge rubber waterstops on double-hole frame box culverts;

[0015] S70. Arrange temporary beam foundations and piers along the track, and erect temporary beams.

[0016] S80. Installation of a portion of the double-hole frame box culvert and provision of temporary rigid supports;

[0017] S90. Placement of the remaining double-hole frame box culverts;

[0018] S100. Final construction of double-hole frame box culvert;

[0019] S110. Complete construction.

[0020] Furthermore, the step “S10. Stress analysis of the double-hole frame box culvert, obtaining bending moment and shear force information of the top and bottom plates of the double-hole frame box culvert” includes the following steps:

[0021] S11. Collect information on double-hole frame box culverts, conduct preliminary analysis of the double-hole frame box culvert data, and organize operators to conduct technical briefings;

[0022] S12. Use Midas finite element calculation software to calculate the forces on the double-hole frame box culvert and calculate the bending moment;

[0023] S13. Obtaining bending moment zero point information;

[0024] S14. Use Midas finite element calculation software to calculate the load on the double-hole frame box culvert and calculate the shear force;

[0025] S15. Obtain shear force zero point information.

[0026] Furthermore, the step “S20. Determining the distance between the bending moment zero point of the top and bottom plates of the double-hole frame box culvert and the side walls and the middle wall” includes the following steps:

[0027] S21. Set the distance between the bending moment zero point of the top and bottom plates of the double-hole frame box culvert and the side wall to L1;

[0028] S22. Set the distance between the bending moment zero point of the top and bottom plates of the double-hole frame box culvert and the middle wall to L2.

[0029] Furthermore, the step “S30. Determining the distance between the shear force zero point of the top and bottom plates of the double-hole frame box culvert and the side walls and the middle wall” includes the following steps:

[0030] S31. Set the distance between the shear zero point of the top and bottom plates of the double-hole frame box culvert and the side wall to L3;

[0031] S32. Set the distance between the shear zero point of the top and bottom plates of the double-hole frame box culvert and the middle wall to L4.

[0032] Furthermore, the step “S50. Setting a post-cast strip on the double-hole frame box culvert” includes the following steps:

[0033] S51. Set a 20-50cm post-cast joint between the top and bottom plates of the double-hole frame box culvert.

[0034] Furthermore, the step “S60. Setting the steel bar connector and the steel edge rubber water stop on the double-hole frame box culvert” includes the following steps:

[0035] S61. When prefabricating double-hole frame box culverts, embed steel bar connectors at the boundary between the top and bottom plates;

[0036] S62. When prefabricating double-hole frame box culverts, install steel-edge rubber waterstop at the boundary between the top and bottom plates.

[0037] Furthermore, the step “S70. Arrange the temporary beam foundation and piers on the track line, and erect the temporary beam” includes the following steps:

[0038] S71. Conduct field surveys to preliminarily determine the approximate layout of temporary beam foundations and piers along the track line;

[0039] S72. Draw the layout of the temporary beam foundation and piers on the drawing, determine the optimal layout plan, and complete the positioning.

[0040] Furthermore, the step “S80. Installation of the semi-hole box culvert and provision of temporary rigid support” includes the following steps:

[0041] S81. Jacking half-hole box culvert;

[0042] S82. Arrange temporary rigid supports at the gaps in the half-hole box culvert.

[0043] Furthermore, the step “S90. placement of remaining box culverts” includes the following steps:

[0044] S91. Reposition the temporary beam;

[0045] S92. Jacking the remaining box culvert;

[0046] S93. During the process of jacking the remaining box culverts, remove the affected temporary beam piers.

[0047] Furthermore, the step “S100. Finishing construction of double-hole frame box culvert” includes the following steps:

[0048] S101. Connect the temporary rigid supports and steel edge rubber waterstops on the double-hole frame box culvert;

[0049] S102. Pour micro-expansive concrete into the post-cast zone;

[0050] S103. Remove the temporary beams and temporary rigid supports.

[0051] The beneficial effects brought about by the technical solution provided by the present invention include: 1. Innovatively proposing a modular box culvert jacking technology; 2. Compared with the conventional double-hole box culvert, this method eliminates part of the side walls of the box culvert, optimizes the total width of the structure, and saves engineering land; 3. Saves the use of concrete and greatly reduces the project cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0053] Figure 1 A bending moment diagram of a double-hole frame box culvert according to a construction method of a double-hole rectangular frame box culvert with module jacking according to the present invention;

[0054] Figure 2 A shear force diagram of a double-hole frame box culvert according to a construction method of a double-hole rectangular frame box culvert with modular jacking according to the present invention;

[0055] Figure 3 This is a schematic diagram of a double-hole frame box culvert according to a construction method of a double-hole rectangular frame box culvert with modular jacking according to the present invention;

[0056] Figure 4 This is a second schematic diagram of a double-hole frame box culvert according to a construction method of a double-hole rectangular frame box culvert with modular jacking according to the present invention;

[0057] Figure 5 A plan view of a temporary beam foundation and piers for a construction method of a double-hole rectangular frame box culvert with modular jacking according to the present invention;

[0058] Figure 6 This is a front view of a temporary beam foundation and a buttress in a construction method of a double-hole rectangular frame box culvert in a modular jacking process according to the present invention;

[0059] Figure 7 A plan view of a half-hole box culvert according to a construction method of a double-hole rectangular frame box culvert with modular jacking according to the present invention;

[0060] Figure 8 A front view of a half-hole box culvert according to a construction method of a double-hole rectangular frame box culvert with modular jacking according to the present invention;

[0061] Figure 9 It is a plan view of the remaining box culvert in the construction method of the present invention for jacking a double-hole rectangular frame box culvert in a modular manner;

[0062] Figure 10 This is a front view of the remaining box culvert in the construction method of the present invention for jacking a double-hole rectangular frame box culvert in a modular manner;

[0063] Figure 11 This is a plan view of the installation of a double-hole frame box culvert according to a construction method of the present invention for jacking a double-hole rectangular frame box culvert in a modular manner;

[0064] Figure 12 This is a front view of the installation of a double-hole frame box culvert according to a construction method of the present invention for jacking a double-hole rectangular frame box culvert in a modular manner;

[0065] Figure 13 A schematic diagram of a double-hole frame box culvert jacking method for a double-hole rectangular frame box culvert jacking method according to the present invention;

[0066] Figure 14 This is an enlarged view of the top and bottom plates of a double-hole frame box culvert according to a construction method of a double-hole rectangular frame box culvert with modular jacking according to the present invention;

[0067] Figure 15 This is an enlarged view of the post-cast zone of a construction method for a double-hole rectangular frame box culvert with modular jacking according to the present invention.

[0068] In the figure: 1. Double-hole frame box culvert; 2. Bending moment zero point; 3. Side wall; 4. Middle wall; 5. Shear force zero point; 6. Post-cast joint; 7. Rebar connector; 8. Steel edge rubber waterstop; 9. Temporary beam foundation; 10. Pier; 11. Temporary beam; 12. Temporary rigid support; 13. Half-hole box culvert; 14. Remaining box culvert; 15. Track line; 16. Micro-expansive concrete. DETAILED DESCRIPTION

[0069] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0070] See also Figures 1 to 15 As shown, an embodiment of the present invention provides a construction method for modular jacking of a double-hole rectangular frame box culvert, comprising the following steps:

[0071] S10. Perform a force analysis on the double-hole frame box culvert 1 to obtain the bending moment and shear force information of the top and bottom plates of the double-hole frame box culvert 1;

[0072] S20. Determine the distance between the bending moment zero point 2 of the top and bottom plates of the double-hole frame box culvert 1 and the side walls 3 and center wall 4;

[0073] S30. Determine the distance between the shear zero point 5 of the top and bottom plates of the double-hole frame box culvert 1 and the side walls 3 and middle wall 4;

[0074] S40. Split the double-hole frame box culvert 1 longitudinally according to the bending moment zero point 2 and the shear force zero point 5 into a half-hole box culvert 13 and a remaining box culvert 14;

[0075] S50. The double-hole frame box culvert 1 is provided with post-cast strip 6;

[0076] S60. Double-hole frame box culvert 1 on the steel connector 7 and the steel edge rubber waterstop 8 settings;

[0077] S70. Arrange the temporary beam foundation 9 and the buttress 10 on the track line 15, and erect the temporary beam 11;

[0078] S80. Placement of half-hole box culvert 13 and provision of temporary rigid support 12;

[0079] S90. Placement of the remaining box culvert 14;

[0080] S100. Final construction of double-hole frame box culvert 1;

[0081] S110. Complete construction.

[0082] See also Figures 1 to 2 As shown, in some embodiments, the step “S10. Stress analysis of the double-hole frame box culvert 1, obtaining bending moment and shear force information of the top and bottom plates of the double-hole frame box culvert 1” includes the following steps:

[0083] S11. Collect information on the double-hole frame box culvert 1, conduct preliminary analysis of the data, and organize operators to conduct technical briefings.

[0084] S12. Use Midas finite element calculation software to calculate the forces acting on the double-hole frame box culvert 1 and calculate the bending moment.

[0085] S13. Obtaining bending moment zero point 2 information;

[0086] S14. Use Midas finite element calculation software to perform force calculation on the double-hole frame box culvert 1 and calculate the shear force;

[0087] S15. Obtain shear force zero point 5 information.

[0088] See also Figures 3 and 4 As shown, in some embodiments, the step “S20. Determining the distance between the bending moment zero point 2 of the top and bottom plates of the double-hole frame box culvert 1 and the side walls 3 and the middle wall 4” includes the following steps:

[0089] S21. Set the distance between the bending moment zero point 2 and the side wall 3 of the double-hole frame box culvert top and bottom plates to L1;

[0090] S22. Set the distance between the bending moment zero point 2 of the top and bottom plates of the double-hole frame box culvert and the middle wall 4 to L2.

[0091] In some embodiments, the step “S30. Determining the distance between the shear force zero point 5 of the top and bottom plates of the double-hole frame box culvert 1 and the side walls 3 and the middle wall 4” includes the following steps:

[0092] S31. Set the distance between the shear zero point 5 and the side wall 3 of the double-hole frame box culvert 1 and the top and bottom plates to L3;

[0093] S32. Set the distance between the shear force zero point 5 of the top and bottom plates of the double-hole frame box culvert 1 and the middle wall 4 to L4.

[0094] In this embodiment, see Figure 3 The figure shows a two-way four-lane double-hole frame box culvert 1. A conventional two-way four-lane double-hole frame box culvert 1 has a total width span of 21 to 22 meters. In this embodiment, the two-way four-lane frame box culvert 1 is decomposed into two modules. The distance between the dividing point and the side wall 3 is approximately L3 to L1, and the distance between the dividing point and the middle wall 4 is approximately L2 to L4.

[0095] Also, see Figure 4 The figure shows a two-way six-lane double-hole frame box culvert 1. A conventional two-way six-lane double-hole frame box culvert 1 has a total span of 33 to 34 meters. In this embodiment, the two-way six-lane double-hole frame box culvert 1 is decomposed into three modules. The distance between the dividing point and the side wall 3 is approximately L3 to L1, and the distance between the dividing point and the center wall 4 is approximately L2 to L4.

[0096] See also Figure 15 As shown, in some embodiments, the step “50. Setting the post-cast strip 6 on the double-hole frame box culvert 1” S includes the following steps:

[0097] S51. A 20-50 cm post-cast strip 6 is provided between the top and bottom plates of the double-hole frame box culvert 1.

[0098] In this embodiment, a 20-50 cm post-cast strip 6 is provided on the top and bottom plates between adjacent double-hole frame box culverts 1 .

[0099] See also Figure 14 As shown, in some embodiments, the step “S60. Setting the steel bar connector 7 and the steel edge rubber water stop 8 on the double-hole frame box culvert 1” includes the following steps:

[0100] S61. When prefabricating a double-hole frame box culvert 1, pre-embed the steel connector 7 at the boundary between the top and bottom plates;

[0101] S62. When prefabricating the double-hole frame box culvert 1, a steel-edge rubber waterstop 8 is installed at the boundary between the top and bottom plates.

[0102] In this embodiment, when prefabricating the double-hole frame box culvert 1 module, the steel bar connector 7 and the steel edge rubber water stop 8 are embedded at the boundary between the top and bottom plates of the double-hole frame box culvert 1 .

[0103] The steel bar connector 7 of the post-cast zone 6 is the same as that of the double-hole frame box culvert 1 .

[0104] At the same time, the steel edge rubber waterstop strips 8 at the interface between the top and bottom plates of adjacent double-hole frame box culverts 1 are staggered.

[0105] See also Figures 5 to 12 As shown, in some embodiments, the step “S70. Arrange the temporary beam foundation 9 and the pier 10 on the track line 15, and erect the temporary beam 11” includes the following steps:

[0106] S71. Conduct field surveys to preliminarily determine the approximate layout range of the temporary beam foundation 9 and the buttress 10 on track line 15;

[0107] S62. Draw the layout of the temporary beam foundation 9 and the pier 10 on the drawing, determine the optimal layout plan, and complete the positioning.

[0108] In some embodiments, the step “S80. Installing the half-hole box culvert 13 and setting the temporary rigid support 12” includes the following steps:

[0109] S81. Jacking half-hole box culvert 13;

[0110] S82. Arrange temporary rigid supports 12 at the gaps of the half-hole box culvert 13.

[0111] In some embodiments, the step “S90. Placement of remaining box culverts 14” includes the following steps:

[0112] S91. Re-adjust the position of the temporary beam 11;

[0113] S92. Jacking the remaining box culvert 14;

[0114] S93. During the process of jacking the remaining box culvert 14, remove the affected temporary beam pier 10.

[0115] In some embodiments, the step “S100. Finishing construction of the double-hole frame box culvert 1” includes the following steps:

[0116] S101. Connecting the double-hole frame box culvert 1 on the temporary rigid support 12 and the steel edge rubber waterstop 8;

[0117] S102 pouring micro-expansion concrete 16 in the post-cast zone 6;

[0118] S103. Remove the temporary beam 11 and the temporary rigid support 12.

[0119] In this embodiment, the slightly expansive concrete 16 poured in the post-cast zone 6 and the slightly expansive concrete 16 poured in the double-hole frame box culvert 1 are of the same type.

[0120] The beneficial effects brought about by the technical solution provided by the present invention include: 1. Innovatively proposing a modular box culvert jacking technology; 2. Compared with the conventional double-hole box culvert, this method eliminates part of the side walls of the box culvert, optimizes the total width of the structure, and saves engineering land; 3. Saves the use of concrete and greatly reduces the project cost.

[0121] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper" and "lower" is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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. Unless otherwise clearly specified and limited, the terms "set", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0122] It should be noted that, in this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprises" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0123] The foregoing description is intended only to provide specific embodiments of the present invention, which will enable those skilled in the art to understand and implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not intended to be limited to the embodiments shown herein, but is to be construed in the widest possible manner consistent with the principles and novel features disclosed herein.

Claims

1. A construction method for modular jacking of double-hole rectangular frame box culverts, characterized in that: The following steps are involved: S10. Perform stress analysis on the double-hole frame box culvert (1) to obtain the bending moment and shear force information of the top and bottom plates of the double-hole frame box culvert (1); S20. Determination of the distance between the bending moment zero point (2) of the top and bottom plates of a double-hole frame box culvert (1) and the side walls (3) and the middle wall (4); S30. Determination of the distance between the shear zero point (5) of the top and bottom plates of the double-hole frame box culvert (1) and the side walls (3) and the middle wall (4); S40. Splitting the double-hole frame box culvert (1) longitudinally according to the bending moment zero point (2) and the shear force zero point (5) into a half-hole box culvert (13) and a remaining box culvert (14); S50. Setting of the post-cast strip (6) on the double-hole frame box culvert (1); S60. The setting of the steel connector (7) and the steel edge rubber water stop (8) on the double-hole frame box culvert (1); S70. Arrange the temporary beam foundation (9) and the buttress (10) on the track line (15), and erect the temporary beam (11); S80. Installation of half-hole box culvert (13) and provision of temporary rigid support (12); S90. Placement of remaining box culverts (14); S100. Final construction of double-hole frame box culvert (1); S110. Complete construction.

2. The construction method of a modular double-hole rectangular frame box culvert according to claim 1 is characterized in that: The step "S10. Stress analysis of the double-hole frame box culvert (1), obtaining bending moment and shear force information of the top and bottom plates of the double-hole frame box culvert (1)" comprises the following steps: S11. Collect information on the double-hole frame box culvert (1), conduct preliminary analysis of the double-hole frame box culvert (1) data, and organize operators to conduct technical briefings; S12. Use Midas finite element calculation software to calculate the stress of the double-hole frame box culvert (1) and calculate the bending moment; S13. Obtain the bending moment zero point (2) information; S14. Use Midas finite element calculation software to calculate the load on the double-hole frame box culvert (1) and calculate the shear force; S15. Obtain the shear force zero point (5) information.

3. The construction method of a modular double-hole rectangular frame box culvert according to claim 1 is characterized in that: The step "S20. Determining the distance between the bending moment zero point (2) of the top and bottom plates of the double-hole frame box culvert (1) and the side walls (3) and the middle wall (4)" comprises the following steps: S21. Set the distance between the bending moment zero point (2) of the top and bottom plates of the double-hole frame box culvert and the side wall (3) to L1; S22. Set the distance between the bending moment zero point (2) of the top and bottom plates of the double-hole frame box culvert and the middle wall (4) to L2.

4. The construction method of a modular double-hole rectangular frame box culvert according to claim 1 is characterized in that: The step "S30. Determining the distance between the shear force zero point (5) of the top and bottom plates of the double-hole frame box culvert (1) and the side walls (3) and the middle wall (4)" comprises the following steps: S31. Set the distance between the shear zero point (5) of the top and bottom plates of the double-hole frame box culvert (1) and the side wall (3) to L3; S32. Set the distance between the shear force zero point (5) of the top and bottom plates of the double-hole frame box culvert (1) and the middle wall (4) to L4.

5. The construction method of a modular double-hole rectangular frame box culvert according to claim 1 is characterized in that: The step "S50. Setting the post-cast strip (6) on the double-hole frame box culvert (1)" comprises the following steps: S51. A 20-50 cm post-cast strip (6) is provided between the top and bottom plates of the double-hole frame box culvert (1).

6. The construction method of a modular double-hole rectangular frame box culvert according to claim 1, characterized in that: The step "S60. Arranging the steel bar connector (7) and the steel edge rubber water stop (8) on the double-hole frame box culvert (1)" comprises the following steps: S61. When prefabricating a double-hole frame box culvert (1), pre-embed a steel bar connector (7) at the boundary between the top and bottom plates; S62. When prefabricating a double-hole frame box culvert (1), a steel-edge rubber waterstop (8) is provided at the boundary between the top and bottom plates.

7. The construction method of a modular double-hole rectangular frame box culvert according to claim 1, characterized in that: The step "S70. Arranging the temporary beam foundation (9) and the buttress (10) on the track line (15), and erecting the temporary beam (11)" includes the following steps: S71. Conduct a field survey to preliminarily determine the approximate layout of the temporary beam foundation (9) and the pier (10) on the track line (15); S72. Draw the layout of the temporary beam foundation (9) and the pier (10) on the drawing, determine the optimal layout plan, and complete the positioning.

8. The construction method of a modular double-hole rectangular frame box culvert according to claim 1, characterized in that: The step "S80. placement of the half-hole box culvert (13) and provision of the temporary rigid support (12)" comprises the following steps: S81. Jacking half-hole box culvert (13); S82. Arrange temporary rigid supports (12) at the gap of the half-hole box culvert (13).

9. The construction method of a modular double-hole rectangular frame box culvert according to claim 1, characterized in that: The step "S90. placement of the remaining box culvert (14)" includes the following steps: S91. Re-adjust the position of the temporary beam (11); S92. Jacking the remaining box culvert (14); S93. During the process of jacking the remaining box culvert (14), remove the affected temporary beam pier (10).

10. The construction method of a modular double-hole rectangular frame box culvert according to claim 1, characterized in that: The step "S100. Finishing construction of the double-hole frame box culvert (1)" includes the following steps: S101. Connect the temporary rigid support (12) and the steel edge rubber water stop (8) on the double-hole frame box culvert (1); S102. pouring micro-expansion concrete (16) in the post-cast zone (6); S103. Remove the temporary beam (11) and the temporary rigid support (12).

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