Construction method of flood-passing steel trestle based on scouring of bank slope

Abstract

This invention relates to a construction method for a steel trestle bridge under a scourted bank slope, comprising the following steps: constructing a structural foundation on the bank slope; providing a guide frame, which is constructed on the side of the structural foundation, the guide frame having several mounting holes corresponding to the positions of the piles to be constructed; providing several steel pipe piles, passing the steel pipe piles through the mounting holes and driving them into the bank slope; dismantling the guide frame; providing support brackets and connecting beams, welding the support brackets to the side of the steel pipe piles, and fixing the connecting beams on the support brackets, the top elevation of the connecting beams matching the top elevation of the steel pipe piles; providing a bridge deck, fixing the bridge deck on the top of the several steel pipe piles, the bridge deck having openings corresponding to the positions of the steel pipe piles; and providing a rotary drilling rig.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and specifically to a construction method for a steel trestle bridge for flood control based on a scourted bank slope. Background Technology

[0002] In civil engineering, the natural drawdown zone of eroded riverbanks is prone to severe collapse due to long-term weathering and alternating erosion caused by seasonal water level changes or periodic water storage. To connect the two sides of a collapsed bank, steel trestle bridges are typically used as temporary construction access. However, when constructing flood-crossing steel trestle bridges on eroded bank slopes, the need for anchor piles and other technical measures due to flood requirements prevents the access of large equipment such as rotary drilling rigs, concrete trucks, and mobile cranes due to severe collapses. Furthermore, the irregular scouring of the river makes the collapse situation complex and varied, posing diverse requirements for the structural design of flood-crossing steel trestle bridges. Summary of the Invention

[0003] The purpose of this invention is to overcome the defects of the prior art and provide a construction method for a steel trestle bridge under a scour bank slope. First, the structural foundation is constructed on the bank slope to provide a solid construction point for subsequent construction. Then, a guide frame is set up to prevent the steel pipe piles from tilting during installation. Finally, a bridge deck is installed on top of the steel pipe piles to facilitate the entry of rotary drilling rigs and other equipment.

[0004] A technical solution to achieve the above objectives is a construction method for a steel trestle bridge under an eroded bank slope during flood season, comprising the following steps:

[0005] The structural foundation shall be constructed on the aforementioned slope;

[0006] A guide frame is provided, and the guide frame is fixedly installed on the side of the structural foundation. The guide frame has a number of mounting holes corresponding to the position of the pile to be constructed.

[0007] A number of steel pipe piles are provided, and the steel pipe piles are driven through the installation holes and installed in the bank slope;

[0008] Remove the guide frame, provide a support bracket and a connecting beam, weld the support bracket to the side of the steel pipe pile, and fix the connecting beam to the top of the support bracket. The top elevation of the connecting beam is adapted to the top elevation of the steel pipe pile.

[0009] A bridge deck is provided and fixedly installed on the top of a plurality of steel pipe piles, wherein the bridge deck has an opening corresponding to the position of the steel pipe piles;

[0010] A rotary drilling rig is provided to drill holes in the steel pipe pile. After drilling is completed, the steel pipe pile is grouted.

[0011] Furthermore, after the connecting beam is installed, a main crossbeam and a main longitudinal beam are provided, the main crossbeam and the main longitudinal beam are welded to the top of the connecting beam, and the bridge deck is fixedly installed on the top of the main crossbeam and the main longitudinal beam.

[0012] Furthermore, during the installation of the main crossbeam and the main longitudinal beam, a crane is provided to place the main crossbeam and the main longitudinal beam onto the connecting beam.

[0013] Furthermore, when welding the supporting bracket, a suspended platform is provided to lower the construction workers below to weld the supporting bracket.

[0014] Furthermore, the guide frame includes longitudinal beams and transverse beams;

[0015] When installing the guide frame, several longitudinal beams are fixedly installed on the side of the structural foundation. The spacing between two adjacent longitudinal beams is adapted to the diameter of the pile to be constructed. According to the position of the pile to be constructed, two transverse beams are set between two adjacent longitudinal beams. The spacing between the two transverse beams is adapted to the diameter of the pile to be constructed.

[0016] Furthermore, after the guide frame is removed, the steel pipe piles are continued to be driven into the bank slope until the top elevation of the steel pipe piles matches the design elevation.

[0017] Furthermore, after the bridge deck is installed on the connecting beam, the bridge deck is cut to form the opening corresponding to the position of the steel pipe pile, and a cover plate is provided to cover the opening. When drilling the steel pipe pile, the cover plate is removed.

[0018] Furthermore, when cutting the opening, the size of the opening is cut according to the on-site construction requirements.

[0019] Furthermore, a mobile crane is provided for installing the bridge deck, and the bridge deck is installed using the mobile crane.

[0020] Furthermore, the bridge deck is composed of several bridge deck units spliced ​​together, and an expansion joint is reserved between two adjacent bridge deck units during the installation of the bridge deck.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] First, the structural foundation is constructed on the bank slope to provide a solid construction point for subsequent construction. Then, a guide frame is set up to prevent the steel pipe piles from tilting during driving. Finally, a bridge deck is installed on top of the steel pipe piles to facilitate the entry of rotary drilling rigs and other equipment. Attached Figure Description

[0023] Figure 1 This is an overall structural diagram of a construction method for a steel trestle bridge under scourted bank slopes during flood season.

[0024] Figure 2 This is a construction effect diagram of a steel trestle bridge construction method based on scour bank slopes for flood control.

[0025] Legend: 1. Steel pipe pile; 2. Support bracket; 3. Bridge deck. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0027] See Figure 1 A construction method for a steel trestle bridge under a scourted bank slope for flood control includes the following steps: constructing a structural foundation on the bank slope; providing a guide frame, which is constructed on the side of the structural foundation, with several mounting holes formed on the guide frame corresponding to the positions of the piles to be constructed; providing several steel pipe piles 1, passing the steel pipe piles 1 through the mounting holes and driving them into the bank slope; removing the guide frame; providing support brackets 2 and connecting beams, welding the support brackets 2 to the side of the steel pipe piles 1, and fixing the connecting beams on the support brackets 2, with the top elevation of the connecting beams matching the top elevation of the steel pipe piles 1; providing a bridge deck 3, which is fixedly installed on the top of several steel pipe piles 1, with openings formed on the bridge deck 3 corresponding to the positions of the steel pipe piles 1; providing a rotary drilling rig, drilling holes in the steel pipe piles 1 using the rotary drilling rig, and grouting the steel pipe piles 1 after drilling is completed.

[0028] In this invention, a preferred embodiment is as follows: a structural foundation is constructed on the bank slope. This foundation provides a stable construction area for subsequent construction, preventing instability of the foundation due to collapse. After the foundation is set up, a guide frame is installed on the side of the foundation. This guide frame provides guidance and support for the subsequent construction of the steel pipe piles 1, preventing the steel pipe piles 1 from tilting during driving and causing instability in their support. When the steel pipe piles 1 are driven down to a point where the top elevation of the steel pipe piles 1 is 50cm higher than the top elevation of the guide frame, the driving of the steel pipe piles 1 is paused, and the guide frame is removed. After the guide frame is removed, the driving of the steel pipe piles 1 continues until the top elevation of the steel pipe piles 1 matches the predetermined design elevation. The construction of the steel pipe piles 1 is then completed. Subsequently, a fixed support bracket 2 is welded to the side of the steel pipe pile 1. This fixed support bracket 2 provides a support foundation for subsequent construction to facilitate the subsequent construction. Preferably, two support brackets 2 are set on the side of each steel pipe pile 1, and the two support brackets 2 are set opposite each other on opposite sides of the steel pipe pile 1. A connecting beam of appropriate length is selected according to the spacing between the support brackets 2, and the connecting beam is welded to the support bracket 2. The connecting beam is fixed to the support bracket 2 by welding. Then, the bridge deck 3 is set on the top of the connecting beam. The bridge deck 3 is fixedly connected to the connecting beam by full welding. After the bridge deck 3 is constructed, a rotary drilling rig and a grouting truck can travel on the top of the bridge deck 3 to carry out subsequent construction of the steel pipe pile 1.

[0029] Furthermore, after the bridge deck 3 is constructed, its size can be expanded. The expansion method is as follows: a guide frame is set on the side of the bridge deck 3, and steel pipe piles 1 are driven into the installation holes of the guide frame as the foundation for the expansion of the bridge deck 3. Then, a support bracket 2 is set on the side of the steel pipe pile 1, and a connecting beam is welded on the support bracket 2. Another bridge deck 3 is set on the connecting beam to expand the bridge deck 3. Construction personnel can expand multiple bridge decks 3 according to the on-site construction requirements, thereby better completing the construction.

[0030] Furthermore, after the connecting beams are installed, main crossbeams and main longitudinal beams are provided. The main crossbeams and main longitudinal beams are welded to the top of the connecting beams, and the bridge deck 3 is fixedly installed on the top of the main crossbeams and main longitudinal beams. Preferably, after the connecting beams are installed, main crossbeams are installed between two opposing connecting beams, and then main longitudinal beams are installed on several main crossbeams. The main crossbeams and main longitudinal beams are fixedly installed by welding.

[0031] Furthermore, during the installation of the main crossbeam and the main longitudinal beam, a crane is provided to place the main crossbeam and the main longitudinal beam onto the connecting beam. During construction, the crane is moved to the already installed construction foundation or bridge deck 3, and then the main longitudinal beam and the main crossbeam are installed using a lifting frame.

[0032] Furthermore, during the welding of the supporting bracket 2, a suspended platform is provided to lower the workers below for welding the supporting bracket 2. Using the suspended platform as an operating platform ensures welding quality.

[0033] Furthermore, the guide frame includes longitudinal beams and transverse beams; when installing the guide frame, several longitudinal beams are fixedly installed on the side of the structural foundation, the spacing between two adjacent longitudinal beams is adapted to the diameter of the pile to be constructed, and according to the position of the pile to be constructed, two transverse beams are set between two adjacent longitudinal beams, the spacing between the two transverse beams is adapted to the diameter of the pile to be constructed.

[0034] Furthermore, after the guide frame is removed, the steel pipe pile 1 continues to be driven into the bank slope until the top elevation of the steel pipe pile 1 matches the design elevation.

[0035] Furthermore, after the bridge deck 3 is installed on the connecting beam, the bridge deck 3 is cut to form the opening corresponding to the position of the steel pipe pile 1, and a cover plate is provided to cover the opening. When drilling the steel pipe pile 1, the cover plate is removed. Preferably, the size of the opening is the diameter of the steel pipe pile 1 + 100mm, and the size of the cover plate matches the size of the opening. Limiting baffles are provided around the top of the cover plate. When construction of the steel pipe pile 1 is required, the cover plate only needs to be removed to facilitate construction, and when vehicles need to pass, the cover plate can be re-covered to facilitate vehicle passage.

[0036] Furthermore, when cutting the opening, the size of the opening is cut according to the on-site construction requirements.

[0037] Furthermore, a truck crane is provided for installing the bridge deck 3.

[0038] Furthermore, the bridge deck 3 is composed of several bridge deck 3 units spliced ​​together, and an expansion joint is reserved between two adjacent bridge deck 3 units when installing the bridge deck 3.

[0039] The following describes the application process of the construction method of a steel trestle bridge for flood crossing based on scour slopes according to the present invention.

[0040] The structural foundation is constructed on the bank slope. This foundation provides a stable construction area for subsequent work, preventing instability due to collapse. After the foundation is installed, a guide frame is installed on its side. This guide frame provides guidance and support for the subsequent construction of steel pipe piles 1, preventing tilting and instability during pile driving. When the top elevation of the steel pipe pile 1 is 50cm higher than the top elevation of the guide frame, pile driving is paused, and the guide frame is removed. After removal, pile driving continues until the top elevation matches the predetermined design elevation. After the steel pipe pile 1 is completed, the steel pipe column is... The side of the steel pipe pile 1 is welded with a fixed support bracket 2, which provides a support foundation for subsequent construction to facilitate the subsequent construction. Preferably, two support brackets 2 are set on the side of each steel pipe pile 1, and the two support brackets 2 are set opposite each other on opposite sides of the steel pipe pile 1. A connecting beam of appropriate length is selected according to the spacing between the support brackets 2, and the connecting beam is welded to the support bracket 2. The connecting beam is fixed to the support bracket 2 by welding. Then, the bridge deck 3 is set on the top of the connecting beam. The bridge deck 3 is fixedly connected to the connecting beam by full welding. After the bridge deck 3 is constructed, the top of the bridge deck 3 can be used for the rotary drilling rig and the grouting truck to carry out subsequent construction of the steel pipe pile 1.

[0041] The present invention has been described in detail above with reference to the accompanying drawings and embodiments. Those skilled in the art can make various modifications to the present invention based on the above description. Therefore, certain details in the embodiments should not be construed as limiting the present invention, and the scope of protection of the present invention shall be defined by the appended claims.

Claims

1. A construction method of a flood-passing steel trestle based on scouring of a bank, characterized in that, Includes the following steps: The structural foundation shall be constructed on the aforementioned slope; A guide frame is provided, and the guide frame is fixedly installed on the side of the structural foundation. The guide frame has a number of mounting holes corresponding to the position of the pile to be constructed. A number of steel pipe piles are provided, and the steel pipe piles are driven through the installation holes and installed in the bank slope; Remove the guide frame, provide a support bracket and a connecting beam, weld the support bracket to the side of the steel pipe pile, and fix the connecting beam to the top of the support bracket. The top elevation of the connecting beam is adapted to the top elevation of the steel pipe pile. A bridge deck is provided and fixedly installed on the top of a plurality of steel pipe piles, wherein the bridge deck has an opening corresponding to the position of the steel pipe piles; A rotary drilling rig is provided to drill holes in the steel pipe pile. After drilling is completed, the steel pipe pile is grouted.

2. The construction method of a flood-passing steel trestle based on the scouring of a bank slope according to claim 1, characterized in that After the connecting beam is installed, a main crossbeam and a main longitudinal beam are provided. The main crossbeam and the main longitudinal beam are welded to the top of the connecting beam, and the bridge deck is fixedly installed on the top of the main crossbeam and the main longitudinal beam.

3. The construction method of a flood-passing steel trestle based on the scouring of a bank slope according to claim 2, characterized in that When installing the main crossbeam and the main longitudinal beam, a crane is provided to place the main crossbeam and the main longitudinal beam onto the connecting beam.

4. The construction method of a flood-passing steel trestle based on the scouring of a bank slope according to claim 1, characterized in that: When welding the supporting bracket, a suspended platform is provided to lower the workers below to weld the supporting bracket.

5. The construction method for a steel trestle bridge under a scourted bank slope according to claim 1, characterized in that: The guide frame includes longitudinal beams and transverse beams; When installing the guide frame, several longitudinal beams are fixedly installed on the side of the structural foundation. The spacing between two adjacent longitudinal beams is adapted to the diameter of the pile to be constructed. According to the position of the pile to be constructed, two transverse beams are set between two adjacent longitudinal beams. The spacing between the two transverse beams is adapted to the diameter of the pile to be constructed.

6. A construction method for a steel trestle bridge under a scourted bank slope for flood control, as described in claim 1, is characterized in that: After the guide frame is removed, the steel pipe piles are continued to be driven into the bank slope until the top elevation of the steel pipe piles matches the design elevation.

7. A construction method for a steel trestle bridge under a scourted bank slope for flood control, as described in claim 1, is characterized in that: After the bridge deck is installed on the connecting beam, the bridge deck is cut to form the opening corresponding to the position of the steel pipe pile, and a cover plate is provided to cover the opening. When drilling the steel pipe pile, the cover plate is removed.

8. The construction method for a steel trestle bridge under a scourted bank slope according to claim 7, characterized in that: When cutting the opening, the size of the opening is cut according to the on-site construction requirements.

9. The construction method for a steel trestle bridge under an eroded bank slope according to claim 1, characterized in that: A mobile crane is provided for installing the bridge deck.

10. The construction method for a steel trestle bridge under an eroded bank slope according to claim 1, characterized in that: The bridge deck is composed of several bridge deck units spliced ​​together. When installing the bridge deck, an expansion joint is reserved between two adjacent bridge deck units.

Images