Search

CN-115787711-B - Crossing structure for steel pipe crossing river channel and construction method

CN115787711BCN 115787711 BCN115787711 BCN 115787711BCN-115787711-B

Abstract

The application relates to the technical field of pipeline laying, in particular to a traversing structure of a steel pipe traversing a river channel and a construction method, comprising the following steps of S1, driving at least two fixing piles on the river channel along the river width direction of the river channel, S2, obliquely arranging a water blocking weir wall on the downstream direction of the river channel by taking the fixing piles as base points, S3, adjusting a ditching pontoon in a low-speed channel to dig a pipe channel, S4, adjusting a pipe lifting pontoon to hoist the pipe into the dug pipe channel, adjusting the pipe lifting pontoon to pour a concrete filling layer and a soil layer into the pipe channel, S5, removing or removing the water blocking weir wall to enable a low-speed channel area formed by a new water blocking weir wall and a low-speed channel area formed by a front water blocking weir wall to coincide, S6, repeating the steps S3 and S4, firstly abutting two sections of pipes lifted to the pipe channel in S4, and S7, repeating the steps S5 and S6 in sequence. The application has the effect of laying river-crossing pipelines which are suitable for rivers with narrow river channels and turbulent flow velocity.

Inventors

  • Shan Suinan
  • ZHANG SHENGRUI
  • ZHAO XINYU

Assignees

  • 杭州水利水电勘测设计院有限公司

Dates

Publication Date
20260508
Application Date
20221128

Claims (10)

  1. 1. A construction method for a steel pipe to pass through a river channel is characterized by comprising the following steps: s1, at least two fixing piles (2) are arranged on a river channel (1) along the river width direction of the river channel (1); S2, taking a fixed pile (2) as a base point, obliquely arranging a water blocking weir wall (3) in the downstream direction of the river channel (1), wherein an included angle between the water blocking weir wall (3) and the width direction of the river channel (1) is an acute angle, and the water blocking weir wall (3) divides the river channel (1) into a high-speed runner and a low-speed runner; S3, a ditching pontoon is adjusted to be positioned at the side of the low-speed runner on the water blocking weir wall (3), and a pipe ditch (4) is dug along the river width direction of the low-speed runner; S4, a pipe hanging pontoon is adjusted, a pipeline (5) is hung into the dug pipe trench (4), a concrete filling layer (6) is poured into the pipe trench (4) by the adjusting and pouring pontoon, and a soil layer (7) is paved on the concrete filling layer (6); S5, dismantling or removing the water blocking weir wall (3), obliquely arranging a new water blocking weir wall (3) in the downstream direction of the river channel (1) by taking the fixed piles (2) as base points, wherein the water blocking weir wall (3) is arranged at an obtuse angle with the width direction of the river channel (1), so that a low-speed flow channel formed by the new water blocking weir wall (3) is overlapped with a low-speed flow channel region formed by the front water blocking weir wall (3), and the pre-construction region of the pipeline (5) is butted; S6, repeating the steps S3 and S4, and in the step S4, firstly, butting two sections of pipelines (5) hung to the pipe trench (4), and then pouring a concrete filling layer (6) and a soil layer (7); S7, repeating the steps S5 and S6 in sequence until the pipeline (5) passes through the river channel (1), and finishing pouring; and S8, dismantling the water blocking weir wall (3), and dismantling the fixed piles (2) to finish construction.
  2. 2. The construction method for the steel pipe to pass through the river course according to claim 1, wherein in the S1, at least two rows of fixing piles (2) are arranged on the river course (1) along the river width direction, every two rows of fixing piles (2) are staggered with each other along the flowing water direction, and two ends of a water retaining weir wall (3) in the S2 are respectively arranged on one fixing pile (2) of the two rows of fixing piles (2).
  3. 3. The construction method for the steel pipe to pass through the river channel according to claim 1, wherein the water blocking weir wall (3) is connected with the fixed piles (2) which are not in butt joint with the water blocking weir wall (3) through stay ropes (9).
  4. 4. The construction method for a steel pipe to pass through a river according to claim 1, wherein in said S1, a diversion retaining wall (10) is provided in a direction parallel to a water flow direction of the river (1) and toward an upstream direction of the river (1) with each of said fixing piles (2) as a base point.
  5. 5. The construction method for steel pipes to pass through river course according to claim 1, wherein fixed piles (2) are arranged on the two sides of river course (1), a plurality of cables (11) are also arranged on each fixed pile (2), and the fixed piles are fixedly connected with at least three cables (11) in the construction process of ditching pontoon, hanging pipe pontoon and irrigation pontoon on river course (1) to stabilize the hull.
  6. 6. The construction method for the steel pipe to pass through the river course according to claim 1, wherein a plurality of groups of water blocking weir walls (3) are simultaneously arranged on two sides of the river course (1) respectively, river water slow flow areas are formed on the two sides of the river course (1), and pipelines (5) are arranged on two sides of the river course (1) for simultaneous construction.
  7. 7. The construction method for the steel pipe to pass through the river channel based on the construction method of the steel pipe to pass through the river channel according to any one of claims 1-6 is characterized by comprising two rows of fixing piles (2) arranged along the river width direction of the river channel (1), wherein the two rows of fixing piles (2) are arranged in a staggered mode along the running water direction of the river channel (1), and the water blocking weir wall (3) is arranged in the river channel (1) by taking each fixing pile (2) of the two rows of fixing piles (2) as a base point.
  8. 8. The crossing structure of a steel pipe crossing river course as set forth in claim 7, wherein the water blocking weir wall (3) is a double-arm steel cofferdam wall, the bottom of the double-arm steel cofferdam wall penetrates to the bottom of a river bed, a fixed column (8) is detachably connected between two steel walls of the double-arm steel cofferdam wall, the fixed column (8) penetrates into the river bed, and the depth of the fixed column (8) penetrating into the river bed is greater than that of the double-arm steel cofferdam wall.
  9. 9. The crossing structure of a steel pipe crossing a river course as set forth in claim 8, wherein a receiving wall (12) fixedly connected with two steel walls is arranged between the two steel walls of the double-arm steel cofferdam wall, through holes are formed in the receiving wall (12) along the vertical direction, the fixing columns (8) penetrate into the through holes, and a plurality of through holes are formed in each receiving wall.
  10. 10. The crossing structure of a steel pipe crossing a river course as set forth in claim 7, wherein said water blocking weir wall (3) is arranged in a trapezoid shape in cross section with the bottom side of the trapezoid being arranged toward the bottom of the river course.

Description

Crossing structure for steel pipe crossing river channel and construction method Technical Field The application relates to the technical field of pipeline laying, in particular to a crossing structure of a steel pipe crossing a river channel and a construction method. Background In the construction engineering of various river crossing and river involving building pipelines, the pipelines are required to be buried under a river bed, before construction, a three-dimensional model is usually required to be built by using Midas GTS NX software, and after the finite element simulation is carried out after the preset conditions are applied, the construction scheme is corrected and perfected, and finally the construction scheme is determined. The existing technology for solving the problems generally comprises a shield method, a pipe sinking method and a cofferdam method, wherein the shield method is a construction mode of directly digging a river bed from the river bank to the other side bank of the river by a shield machine to form a communicated duct, the pipe sinking method is a working mode of directly sinking an entire pipeline or a plurality of pipelines into a pre-dug pipe trench at the bottom of the river bed and then filling the pipe trench, and the cofferdam method is a mode of partially cofferdam the river, pumping out river water in a weir and then arranging an open-air pipeline in the weir. When facing a river channel with small river width and turbulent flow velocity, the shield method needs to be provided with a foundation platform of a shield machine, and the like, and has high cost, and the immersed tube method is difficult to realize stable immersed tube and butt joint of each section of a pipeline when facing turbulent water flow, so that the construction difficulty is high, while the cofferdam method is used for facing a small river, and has long construction period in the whole engineering of weir setting, pipe burying and weir dismantling, so that the construction method with short construction period, low construction difficulty and low construction cost is required when facing the pipeline to pass through the river channel with short river width and turbulent flow velocity. Disclosure of Invention The application provides a crossing structure for a steel pipe to cross a river channel and a construction method thereof, which are suitable for river crossing pipeline laying of a river with narrow river channel and rapid flow velocity. The application provides a crossing structure of a steel pipe crossing a river channel and a construction method thereof, which adopts the following technical scheme: First aspect: A construction method for a steel pipe to pass through a river channel comprises the following steps: s1, driving at least two fixing piles on a river course along the river width direction of the river course; s2, using the fixed piles as base points, obliquely arranging water blocking weir walls in the downstream direction of the river channel, wherein the water blocking weir walls are arranged at an acute angle with the included angle in the width direction of the river channel, and dividing the river channel into a high-speed runner and a low-speed runner by the water blocking weir walls; s3, a ditching pontoon is adjusted to be positioned in the low-speed runner at the water blocking weir wall, and a pipe ditch is dug along the river width direction of the runner; S4, adjusting a hanging pipe floating pontoon, hanging a pipeline into the dug pipe trench, adjusting an irrigation floating pontoon to pour a concrete filling layer into the pipe trench, and paving a soil layer on the concrete filling layer; S5, dismantling or removing the water blocking weir wall, obliquely arranging the water blocking weir wall in the downstream direction of the river by taking the fixed piles as base points, wherein the water blocking weir wall is arranged at an obtuse angle with the width direction of the river, so that a low-speed flow channel formed by the new water blocking weir wall is overlapped with a low-speed flow channel region formed by the front water blocking weir wall, and the pre-construction regions of the pipelines are in butt joint; S6, repeating the steps S3 and S4, firstly butting two sections of pipelines which are hung to a pipe ditch in the step S4, and then pouring a concrete filling layer and a soil layer; s7, repeating the steps S5 and S6 in sequence until the pipeline passes through the river channel and pouring is completed; And S8, removing the water blocking weir wall, and removing the fixed piles to finish construction. According to the technical scheme, the fixed piles are arranged along the river width direction of the river, the fixed piles are used as base points, the water blocking weir walls are arranged along the downstream side, the water blocking weir walls are obliquely arranged to divide water flow in the river into two sections, one section of the flow ch