Mounting structure for reducing fission of traction steel pipe

Abstract

The utility model provides a mounting structure for reducing fission of a traction steel pipe, which comprises a soil-entering end inclined linear steel pipe obliquely inserted into the ground from one side of a river, a bottom straight section linear steel pipe straightly penetrating through the lower part of the river, and a soil-exiting end inclined linear steel pipe obliquely protruding out of the ground from the other side of the river, the soil entering end inclined linear steel pipe is connected with the bottom straight section linear steel pipe through a first corrugated connecting pipe, the bottom straight section linear steel pipe is connected with the soil exiting end inclined linear steel pipe through a second corrugated connecting pipe, and the first corrugated connecting pipe and the second corrugated connecting pipe are the same in structure. Each corrugated steel pipe comprises a corrugated steel pipe and a lining steel pipe, and the lining steel pipe is welded on the inner side of the corrugated steel pipe. The mounting structure for reducing the fission of the traction steel pipe can reduce the possibility of damage and explosion of the traction steel pipe and prolong the service life of the traction steel pipe.

Description

Technical Field

[0001] The utility model relates to a steel pipe construction structure, in particular to an installation structure for reducing the fission of a traction steel pipe. Background Technique

[0002] With the increasing number of pipeline projects, the situations of water supply pipelines crossing large river channels and important buildings and structures are also increasing. For water supply pipelines (generally steel pipes) crossing large river channels and important buildings and structures, there are generally methods such as traction, pipe jacking, and immersed tube. Pipe jacking requires the construction of pipe jacking wells, with relatively high safety risks, and the construction period between pipe joints is relatively long, and obstacles in front of the pipeline cannot be predicted in advance, so the construction risk is relatively high; the immersed tube involves many coordinating departments and is only suitable for crossing river channels, while the traction steel pipe does not have the above problems, so the application of the traction steel pipe is increasing.

[0003] The traction steel pipe generally consists of five parts: the straight section at the soil entry end, the curve at the soil entry end, the straight section at the bottom, the curve at the soil exit end, and the straight section at the soil exit end. Since the steel pipe itself has relatively high stiffness and is not easy to bend, while there are certain bends in the curve at the soil entry end and the curve at the soil exit end, there are generally relatively large tensile and compressive stresses (compression in the upper part and tension in the lower part) in the steel pipes at the curve at the soil entry end and the curve at the soil exit end, which are prone to cracks or large deformations, thus affecting the use of the steel pipe and even causing underground pipe bursts. Content of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides an installation structure for reducing the fission of a traction steel pipe, which can reduce the possibility of damage and pipe burst of the traction steel pipe and extend the service life of the traction steel pipe.

[0005] To achieve the above technical solution, the utility model provides an installation structure for reducing the fission of a traction steel pipe, including: an inclined straight steel pipe at the soil entry end obliquely inserted into the ground from one side of the river channel, a straight section straight steel pipe at the bottom passing straight under the river channel, and an inclined straight steel pipe at the soil exit end obliquely protruding from the ground from the other side of the river channel. The inclined straight steel pipe at the soil entry end is connected to the straight section straight steel pipe at the bottom through a first corrugated connecting pipe, and the straight section straight steel pipe at the bottom is connected to the inclined straight steel pipe at the soil exit end through a second corrugated connecting pipe. The first corrugated connecting pipe and the second corrugated connecting pipe have the same structure, and both include a corrugated steel pipe and a lining steel pipe, and the lining steel pipe is welded inside the corrugated steel pipe.

[0006] In the above technical scheme, in view of the fact that the connection between the oblique straight steel pipe at the end of the traction steel pipe entering the ground and the straight steel pipe at the bottom, and the connection between the straight steel pipe at the bottom and the oblique straight steel pipe at the end of the ground is prone to cracks or large deformation due to large tensile and compressive stress, this scheme adopts high-strength corrugated connecting pipes for welding. Since the elongation and compression performance of the corrugated connecting pipe is higher than that of the conventional straight steel pipe, the stress of the steel pipe here can be greatly reduced (the strain of the corrugated steel pipe is much smaller under the same deformation condition, and thus the stress is much smaller), thereby reducing the possibility of steel pipe fission, damage and pipe explosion. At the same time, in order to enhance the safety performance of the connection and avoid the influence of the resistance of the high-strength corrugated steel pipe on the water flow, a lining steel pipe is welded inside the high-strength corrugated steel pipe. By adding a stainless steel lining steel pipe inside the high-strength corrugated steel pipe, the smooth flow of water inside the corrugated connecting pipe is ensured (to prevent fluctuations in the corrugated section of the corrugated pipe), and the disturbance of water flowing in the corrugated connecting pipe is reduced.

[0007] Preferably, straight transition sections are reserved between the front end and rear end of the corrugated steel pipe and the front end and rear end of the lining steel pipe to facilitate welding with the front and rear pipe sections.

[0008] Preferably, the length of the straight transition section is less than or equal to 200 mm. The length of the straight transition section should not be too small, otherwise it will be unfavorable for stable welding. The length of the straight transition section should not be too large, otherwise it will reduce the length of the corrugated section in the corrugated steel pipe and reduce the effect of the corrugated steel pipe.

[0009] Preferably, the length of the first corrugated connecting pipe and the second corrugated connecting pipe is 2-4 m, and can be selected according to actual conditions during the actual installation process.

[0010] Preferably, the first corrugated connecting pipe is installed at the point where the curvature of the inclined straight steel pipe at the buried end and the straight steel pipe at the bottom are connected is the largest. During the actual construction process, the maximum curvature of the connection is most likely to be damaged and burst.

[0011] Preferably, the second corrugated connecting pipe is installed at the point where the curvature of the straight steel pipe in the bottom straight section and the oblique straight steel pipe at the unearthed end are connected is the largest.

[0012] The beneficial effects of an installation structure for reducing the fission of a traction steel pipe provided by the present utility model are as follows: The installation structure for reducing the fission of a traction steel pipe is reasonably designed and simple to construct, which can reduce the possibility of damage and pipe explosion of the traction steel pipe and extend the service life of the traction steel pipe. In actual construction, a high-strength corrugated connecting pipe is used to weld between the inclined straight steel pipe at the soil end and the straight steel pipe at the bottom flat section, as well as between the straight steel pipe at the bottom flat section and the inclined straight steel pipe at the excavation end. Since the elongation and compression performance of the corrugated connecting pipe is higher than that of a conventional straight steel pipe, the steel pipe stress here can be greatly reduced (under the same deformation condition, the strain of the corrugated steel pipe is much smaller, so the stress is much smaller), thereby reducing the possibility of steel pipe fission, damage and pipe explosion. At the same time, in order to enhance the safety performance of the connection and avoid the influence of the resistance of the high-strength corrugated steel pipe on the water flow inside, a lining steel pipe is welded inside the high-strength corrugated steel pipe. By adding a stainless steel lining steel pipe inside the high-strength corrugated steel pipe, the smooth flow of water inside the corrugated connecting pipe is ensured (preventing fluctuations in the corrugated section of the corrugated pipe), and the disturbance of water flow in the corrugated connecting pipe is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic construction diagram of the present utility model.

[0014] Figure 2 It is a schematic internal structure diagram of the corrugated connecting pipe in the present utility model.

[0015] In the figure: 1, ground; 2, river channel; 3, inclined straight steel pipe at the soil end; 4, first corrugated connecting pipe; 41, corrugated steel pipe; 42, lining steel pipe; 43, straight transition section; 5, straight steel pipe at the bottom flat section; 6, second corrugated connecting pipe; 7, inclined straight steel pipe at the excavation end. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0017] Embodiment: An installation structure for reducing the fission of a traction steel pipe.

[0018] Refer to Figures 1 to 2As shown in the figure, an installation structure for reducing the fission of a traction steel pipe includes: an obliquely straight steel pipe 3 at the soil-entering end that is obliquely inserted from one side of the river channel 2 into the ground 1, a straight steel pipe 5 at the bottom straight section that passes straight under the river channel 2, and an obliquely straight steel pipe 7 at the soil-exiting end that obliquely protrudes from the ground 1 on the other side of the river channel 2. The obliquely straight steel pipe 3 at the soil-entering end is connected to the straight steel pipe 5 at the bottom straight section through a first corrugated connecting pipe 4. The first corrugated connecting pipe 4 is installed at the position with the maximum curvature where the obliquely straight steel pipe 3 at the soil-entering end is butt-jointed with the straight steel pipe 5 at the bottom straight section. The straight steel pipe 5 at the bottom straight section is connected to the obliquely straight steel pipe 7 at the soil-exiting end through a second corrugated connecting pipe 6. The second corrugated connecting pipe 6 is installed at the position with the maximum curvature where the straight steel pipe 5 at the bottom straight section is butt-jointed with the obliquely straight steel pipe 7 at the soil-exiting end. During the actual construction process, the maximum curvature of the butt-joint is most likely to be damaged and burst. Therefore, the first corrugated connecting pipe 4 and the second corrugated connecting pipe 6 are respectively installed at the positions with the maximum curvature of the two pipes.

[0019] The first corrugated connecting pipe 4 and the second corrugated connecting pipe 6 have the same structure, and both include a corrugated steel pipe 41 and a lining steel pipe 42. The lining steel pipe 42 is welded inside the corrugated steel pipe 41. The length of the corrugated steel pipe 41 is 4 meters. There are straight transition sections 43 reserved between the front end and the rear end of the corrugated steel pipe 41 and the front end and the rear end of the lining steel pipe 42 to facilitate welding with the front and rear pipe sections. The length of the straight transition section 43 is 200 mm. The length of the straight transition section 43 should not be too small, otherwise it is not conducive to stable welding. The length of the straight transition section 43 should not be too large, otherwise it will reduce the length of the corrugated section in the corrugated steel pipe 41 and reduce the function of the corrugated steel pipe 41.

[0020] The installation structure for reducing the fission of the traction steel pipe is reasonably designed and simple to construct, which can reduce the possibility of damage and pipe explosion of the traction steel pipe and extend the service life of the traction steel pipe. In view of the bending of the curve at the soil entry end and the soil exit end of the traction steel pipe, at the place where the curvature of the estimated soil entry end curve and the soil exit end curve is the largest, a corrugated connecting pipe with a length of 4m is pre-welded in advance (200mm long straight transition sections 43 are reserved at the front and rear ends of the corrugated steel pipe 41 for welding with the front and rear pipe sections). According to the different diameters of the steel pipe, the wave height can be 10mm - 20mm, and the half wavelength can be 20mm - 40mm. Since the elongation and compression performance of the corrugated steel pipe 41 is higher than that of the conventional straight steel pipe, the stress of the steel pipe at the joint can be greatly reduced (under the same deformation condition, the strain of the corrugated steel pipe 41 is much smaller, so the stress is much smaller), thereby reducing the possibility of fission, damage and pipe explosion of the whole small traction steel pipe. At the same time, in order to enhance the safety performance of the joint, the corrugated steel pipe 41 is made of Q345 low alloy steel with better toughness and strength (Q235 carbon steel is generally used in the conventional section). In order to avoid the influence of the resistance of the high-strength corrugated steel pipe 41 on the water flow inside, a stainless steel lining steel pipe 42 with a thickness of 1mm needs to be welded at the front end in the water flow direction inside the high-strength corrugated steel pipe 41, and the length is slightly less than 4m. By adding a stainless steel lining steel pipe 42 inside the high-strength corrugated steel pipe 41, the smooth flow of water inside the corrugated connecting pipe is ensured (preventing fluctuations in the corrugated section of the corrugated pipe), and the disturbance of water flow in the corrugated connecting pipe is reduced.

[0021] The above is the preferred embodiment of the present invention, but the present invention should not be limited to the content disclosed in this embodiment and the drawings. Therefore, all equivalent or modified implementations completed without departing from the spirit disclosed by the present invention fall within the protection scope of the present invention.

Claims

1. An installation structure for reducing the fission of a traction steel pipe, comprising an oblique straight steel pipe at the ground end that is inserted obliquely from one side of a river, a straight steel pipe at the bottom straight section that passes straightly under the river, and an oblique straight steel pipe at the ground end that protrudes obliquely from the other side of the river, characterized in that: The oblique straight steel pipe at the buried end is connected to the straight steel pipe at the bottom by a first corrugated connecting pipe, and the straight steel pipe at the bottom is connected to the oblique straight steel pipe at the unearthed end by a second corrugated connecting pipe. The first corrugated connecting pipe and the second corrugated connecting pipe have the same structure, both including a corrugated steel pipe and an inner lining steel pipe, and the inner lining steel pipe is welded to the inner side of the corrugated steel pipe.

2. The installation structure for reducing the fission of the traction steel pipe according to claim 1, characterized in that: A straight transition section is reserved between the front end and the rear end of the corrugated steel pipe and the front end and the rear end of the lining steel pipe.

3. The installation structure for reducing the fission of the traction steel pipe according to claim 2, characterized in that: The length of the straight transition section is less than or equal to 200 mm.

4. The installation structure for reducing the fission of the traction steel pipe according to claim 1, characterized in that: The lengths of the first corrugated connecting pipe and the second corrugated connecting pipe are 2-4 m.

5. The installation structure for reducing the fission of the traction steel pipe according to claim 1, characterized in that: The first corrugated connecting pipe is installed at the point where the curvature of the inclined straight steel pipe at the buried end and the straight straight steel pipe at the bottom are connected is the largest.

6. The installation structure for reducing the fission of the traction steel pipe according to claim 1, characterized in that: The second corrugated connecting pipe is installed at the point where the curvature is the largest where the straight steel pipe of the bottom straight section and the oblique straight steel pipe of the unearthed end are connected.

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