A method for laying a pipeline along the course of a river or stream

Abstract

The application relates to the pipeline laying technical field and particularly discloses a method for laying a pipeline along the trend of a river or a creek, which comprises the following steps: S001, building a construction road along the trend of the river or the creek; S002, excavating the construction road on one side close to a second slope; S003, pouring concrete to form a first base; S004, installing a pipeline above the first base; S005, drilling first anchor holes in the first base; S006, installing first anchor rods in the first anchor holes and installing second anchor rods in second anchor holes; S007, pouring grout in the first anchor holes to form first anchor members and pouring grout in the second anchor holes to form second anchor members; S008, pouring concrete above the first base to form a second base, wherein the pipeline is poured in the second base; and S009, removing the construction road and restoring the river or the creek. The method solves the problem that the riverbed under the pipeline is easily hollowed out in the traditional laying mode, thereby causing the pipeline to be damaged.

Description

Technical Field

[0001] This application relates to the field of pipeline laying technology, and specifically discloses a method for laying pipelines along the direction of a river. Background Technology

[0002] River pipelines are typically laid along the direction of water flow in rivers or other bodies of water. They are commonly used to transport water, natural gas, oil, and other liquids or gases to meet the water or gas transmission needs of cities, industries, and agriculture. In traditional pipeline laying schemes, pipelines are usually laid directly on the riverbed. Due to the loose and uneven riverbed beneath the pipeline, coupled with the flowing water, the riverbed constantly erodes the foundation beneath the pipeline. The resulting potholes and gullies, coupled with uneven stress on the pipeline, can lead to cracking and damage, threatening the pipeline's stability and safety. In some rivers, water flow and velocity may vary seasonally. During the rainy season, when the water flow is very fast, the pipeline is subjected to buoyancy and the impact of floodwaters, which can eventually cause the pipeline to be eroded or washed away. Moreover, such damage is extremely inconvenient to repair and can easily lead to significant personal injury and property loss. Summary of the Invention

[0003] The purpose of this invention is to solve the problem that the riverbed under which pipelines are traditionally laid is easily eroded, leading to pipeline damage.

[0004] To achieve the above objectives, the basic solution of the present invention provides a method for laying pipelines along the direction of a river, wherein the river includes a riverbed and a first slope and a second slope located on both sides of the riverbed, characterized in that the method for laying pipelines along the direction of the river includes:

[0005] Step S001: Construct a construction access road along the river channel. The construction access road is constructed on the riverbed near the second slope, and the height of the construction access road is higher than the water surface of the river channel.

[0006] Step S002: Excavate the construction access road on the side near the second slope, excavating down to the riverbed to form a casting trench;

[0007] Step S003: Pour concrete into the pouring trench to form the first base;

[0008] Step S004: Install a pipe above the first base, the pipe extending along the direction of the river channel;

[0009] Step S005, drilling a plurality of first anchor holes on the first base along the river course; each of the first anchor holes extends in the vertical direction and extends through the first base to the riverbed; drilling a plurality of second anchor holes in the second slope along the river course; each of the second anchor holes extends in the horizontal direction; each of the first anchor holes corresponds to each of the second anchor holes respectively;

[0010] Step S006, installing a first anchor rod in each of the first anchor holes, installing a second anchor rod in each of the second anchor holes, and binding the end of the second anchor rod exposed from the second slope with the upper end of the first anchor rod;

[0011] Step S007, grouting in each of the first anchor holes to form a first anchor, and grouting in each of the second anchor holes to form a second anchor;

[0012] Step S008, pouring concrete above the first base to form a second base, and the pipeline is poured in the second base;

[0013] Step S009, removing the construction road and restoring the river.

[0014] Further, in step S004, before installing the pipeline, a plurality of pipeline installation supports are arranged on the first base along the river course, and then the pipeline is installed on each of the pipeline installation supports.

[0015] Further, the distance between each of the pipeline installation supports is 750-850mm; the height of each of the pipeline installation supports is 190-210mm.

[0016] Further, in step S005, after the first anchor hole and the second anchor hole are drilled, the step of filling clean water into the first anchor hole and the second anchor hole for washing the hole is further included, and the clean water is returned to the hole until the clean water is returned to the hole.

[0017] Further, the first anchor rod and the second anchor rod are both provided with a centering support, and the centering support is used to place the first anchor rod at the center position of the first anchor hole and the second anchor rod at the center position of the second anchor hole respectively.

[0018] Further, the first base away from the second slope is provided with a first inclined surface, the second base away from the second slope is provided with a second inclined surface, and the first inclined surface and the second inclined surface are flush with each other.

[0019] Further, the end of each of the second anchor rods deep into the second slope is formed with a hook.

[0020] Further, the first anchor rod and the second anchor rod respectively extend into the first anchoring hole and the second anchoring hole by a depth of not less than 6 m.

[0021] Further, in step S002, the pouring groove has a depth of not more than 1 m below the riverbed.

[0022] Further, the distance between the first anchor rod and the second anchor rod is between 1.4 m and 1.6 m.

[0023] The principle and effect of the basic scheme are that:

[0024] 1. Compared with the prior art, the first base, the second base, the first anchor rod and the second anchor rod are arranged, the first base and the second base are fixed by the first anchor rod and the second anchor rod, the second base structure is not displaced by being pulled tight, the river water impact load borne by the first base and the second base is effectively transmitted to the weathered rock layer of the first slope and the second slope and the riverbed, the riverbed below the pipeline is prevented from being hollowed out due to displacement of the base, and thus the pipeline is protected.

[0025] 2. Compared with the prior art, the pipeline is covered by the second base, pipeline corrosion or pipeline rupture caused by water flow impact is avoided, and the pipeline is protected. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a construction construction access diagram of the method for laying the pipeline along the river and creek direction according to the embodiment of the application;

[0027] Figure 2 It is an excavation pouring groove thickness structure diagram of the method for laying the pipeline along the river and creek direction according to the embodiment of the application;

[0028] Figure 3 It is a pouring first base structure diagram of the method for laying the pipeline along the river and creek direction according to the embodiment of the application;

[0029] Figure 4 It is a structure diagram of installing the pipeline of the method for laying the pipeline along the river and creek direction according to the embodiment of the application;

[0030] Figure 5 It is a pouring second base diagram of the method for laying the pipeline along the river and creek direction according to the embodiment of the application;

[0031] Figure 6 It is a plan view of the method for laying the pipeline along the river and creek direction according to the embodiment of the application;

[0032] Figure 7 It is a first anchoring member plan view of the method for laying the pipeline along the river and creek direction according to the embodiment of the application.

[0033] The accompanying drawings are only used for illustrative description and cannot be understood as a limitation to the patent; in order to better illustrate the embodiments, some components in the drawings can be omitted, enlarged or reduced, and the size of the actual product is not represented; it is understandable for those skilled in the art that some well-known structures and their descriptions in the drawings can be omitted; the same or similar reference signs correspond to the same or similar components; the terms used to describe the positional relationship in the drawings are only used for illustrative description and cannot be understood as a limitation to the patent.

[0034] Reference signs:

[0035] Construction access road 1, first slope 101, second slope 102, riverbed 103, pouring groove 2, first base 3, first inclined surface 301, first anchor 4, first anchor hole 41, second anchor hole 42, first anchor rod 5, second anchor rod 6, pipeline 7, second inclined surface 701, second base 8, centering support 9, pipeline installation support 11. DETAILED DESCRIPTION

[0036] It should be noted that the embodiments in the present application and the technical features in the embodiments can be combined with each other without conflict, and the detailed description in the specific embodiments should be understood as the explanation and description of the purpose of the present application, and should not be regarded as improper limitation to the present application.

[0037] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the specific technical scheme of the present application will be further described in detail below in combination with the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application, but not to limit the scope of the present application.

[0038] In the embodiments of the present application, the terms "first" and "second" are only used for description purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include one or more features. In the description of the embodiments of the present application, unless otherwise specified, the meaning of "multiple" is two or more.

[0039] In addition, in the embodiments of the present application, the orientation terms such as "upper", "lower", "left" and "right" are defined relative to the orientation of the components shown in the drawings, and it should be understood that these directional terms are relative concepts, which are used for relative description and clarification, and can be changed accordingly according to the change of the orientation of the components placed in the drawings.

[0040] In the embodiments of the present application, unless otherwise specified and limited, the term "connection" should be understood in a broad sense, for example, "connection" can be fixed connection, or detachable connection, or integral; can be directly connected, or indirectly connected through intermediate medium.

[0041] In the embodiments of the present application, the terms "comprising", "containing" or any other any conjugation of these terms are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements, but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without more limitations, an element defined by the phrase "comprising a... " does not exclude the existence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0042] In the embodiments of the present application, the words "exemplary" or "for example" are used to mean serving as an example or illustration. Any embodiment or design described herein as "exemplary" or "for example" should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the exemplary or for example embodiments are intended to convey concepts in a concrete manner.

[0043] The technical solutions of the present application are described in detail below in combination with specific drawings.

[0044] Please refer to Figure 1 and Figure 2 , a method for laying a pipeline 7 along the river course provided by the present embodiment, wherein the river includes a riverbed 103, a first slope 101 and a second slope 102 located on both sides of the riverbed 103, as shown in Figure 1 , the first slope 101 is located on the left side of the second slope 102, the pipeline 7 can be laid along the river course during the dry season of the river, and the silt and quicksand of the original river are removed before the site is leveled. The construction method includes the following steps:

[0045] Step S001, a construction road 1 is built along the river course by excavator, the construction road 1 is built on the riverbed 103 near the side of the second slope 102 (as shown in Figure 1 , the right side of the riverbed 103), and the height of the construction road 1 is higher than the water surface of the river water;

[0046] Specifically, a 6m wide construction road 1 is built by excavator, the height of the construction road 1 needs to be at least 0.5m higher than the water surface during the dry season, and the paving material of the construction road 1 is not limited, which can use original soil or gravel.

[0047] Along the direction of the river flow, after the construction road 1 is built, as shown in Figure 1 , the staff marks a 3.2m line on the construction road 1 from right to left, and marks the reinforcement head on the line of the construction road 1 as a mark, which is convenient for excavating and pouring the groove 2 on the construction road 1.

[0048] Step S002, a construction road 1 is excavated on the side close to the second slope 102, and the construction road 1 is excavated to the riverbed 103 to form a pouring groove 2;

[0049] Specifically, as shown in Figure 2 , the construction road 1 is excavated in a backward manner along the line marked in step 1 by the excavator, the excavated earth is unloaded outside the construction road 1, the riverbed 103 is cleaned, and the pouring groove 2 is excavated by the excavator. The depth h of the pouring groove 2 below the riverbed 103 is less than or equal to 1 m.

[0050] Step S003, as shown in Figure 3 , C20 dense concrete is poured into the pouring groove 2, and a plurality of steel bars can be placed in the pouring groove 2 to improve the structural strength. After the concrete solidifies, the first base 3 is formed in the pouring groove 2, and the first inclined surface 301 is formed on the side of the first base 3 away from the second slope 102; due to the flow of river water, the riverbed 103 is continuously eroded, the first base 3 plays a role in supporting the pipeline 7, avoiding the river water from hollowing out the bottom of the pipeline 7, thereby playing a role in protecting the pipeline 7;

[0051] As a preferred embodiment, as shown in Figure 3 , the pipeline installation support 11 is inserted when the dense concrete is in the initial setting state, the pipeline installation support 11 plays a role in supporting and protecting the pipeline 7, and can balance the height of the pipeline 7; the pipeline installation supports 11 are arranged at intervals along the river course, the spacing between the pipeline installation supports 11 is 750-850 mm, and the height of each pipeline installation support 11 is 190-210 mm. In this embodiment, the spacing between the pipeline installation supports 11 is preferably 800 mm, and the height of each pipeline installation support 11 is 200 mm.

[0052] Step S004, the pipeline 7 is installed on the pipeline installation support 11, and the pipeline 7 extends along the river course;

[0053] In this embodiment, two pipelines 7 are used, which are arranged above the pipeline installation support 11 (of course, it can be understood that a plurality of pipelines 7 can be arranged, and the number of pipelines 7 is determined according to the specific construction design).

[0054] Step S005, a mechanical spiral drill is used to drill a plurality of first anchor holes 41 on the first base 3 along the river course; each first anchor hole 41 extends in the vertical direction and penetrates the first base 3 to extend into the riverbed 103; a plurality of second anchor holes 42 are drilled in the second slope 102 along the river course; each second anchor hole 42 extends in the horizontal direction; each first anchor hole 41 corresponds to each second anchor hole 42.

[0055] Different strata need to be drilled with different drilling parameters when drilling the first anchor hole 41 and the second anchor hole 42; when drilling loose soil, the "slow rotation speed, small pressure, small pump volume" process is adopted; when drilling dense soil, the "slow rotation speed, small pressure, large pump volume" process is adopted; the drilling original record is made when the first anchor hole 41 and the second anchor hole 42 are constructed, and the strata change is judged according to the drilling speed, the flushing liquid color, the rock powder and the drilling cuttings composition returned from the hole, the drilling pressure change and the sound emitted when the drill rod is drilled.

[0056] The diameters of the drilled first anchor hole 41 and the second anchor hole 42 are between 150-300mm, and the diameters of the first anchor hole 41 and the second anchor hole 42 in the embodiment are 200mm; the verticality deviation of the drilled first anchor hole 41 and the second anchor hole 42 is less than 5%; after drilling, the hole cleaning inspection is performed, and the grouting treatment is immediately performed on the local seepage hole collapse or the falling loose soil in the hole.

[0057] When the first anchor hole 41 and the second anchor hole 42 are drilled, the water is filled into the first anchor hole 41 and the second anchor hole 42 to wash the hole; the water is washed into the first anchor hole 41 and the second anchor hole 42 by using the high-pressure water gun, and the washing hole is ended when the clear water is returned from the hole of the first anchor hole 41 and the second anchor hole 42.

[0058] In step S006, the first anchor rod 5 is installed in each first anchor hole 41, the second anchor rod 6 is installed in each second anchor hole 42, and the end of the second anchor rod 6 exposed from the second slope 102 is tied with the upper end of the first anchor rod 5; the depths of the first anchor rod 5 and the second anchor rod 6 respectively inserted into the first anchor hole 41 and the second anchor hole 42 are not less than 6m.

[0059] As shown in Figure 4 , the first anchor rod 5 and the second anchor rod 6 should be rusted before being cut into sections according to the designed length; the first anchor rod 5 or the second anchor rod 6 needs to be welded, and the welding is performed in the form of double lap joint, and the welding length is not less than 8D (D is the diameter of the steel bar); the surface of the end of the first anchor rod 5 and the second anchor rod 6 is coated with the anti-rust epoxy protective paint.

[0060] As shown in Figure 5 , Figure 6 , and Figure 7 , the centering support 9 is arranged on the first anchor rod 5 and the second anchor rod 6, and the centering support 9 is respectively used for placing the first anchor rod 5 at the central position of the first anchor hole 41 and placing the second anchor rod 6 at the central position of the second anchor hole 42; the interval between the adjacent centering supports 9 on the first anchor rod 5 and the second anchor rod 6 is between 1.4m-1.6m, and in the embodiment, the first anchor rod 5 is located at the middle position of the first anchor hole 41, and it is preferred that the centering support 9 is arranged every 1.5m.

[0061] Step S007, grouting in each first anchor hole 41 to form a first anchor; grouting in each second anchor hole 42 to form a second anchor;

[0062] Specifically, the grouting uses cement mortar prepared by 425# Portland cement, water-cement ratio W / C = 0.38-0.50, 0.4% of the retarder is added, the strength of the grouting body should not be less than 30 MPa; the first anchor rod 5 and the second anchor rod 6 are respectively inserted into the first anchor hole 41 and the second anchor hole 42 to a depth of not less than 95% of the design length, and the grouting is performed from the bottom of the hole to the outside, and as the grout is grouted, the grouting pipe is gradually pulled out to the hole opening, and the pipe opening should be ensured to be always buried in the cement grout during the pipe pulling process, and the grouting is stopped when the grout overflows from the hole opening.

[0063] The cement grout for grouting uses Portland cement, and the strength thereof should not be less than 42.5 MPa, and the strength of the cement mortar should not be less than 30 MPa; the first anchor hole 41 is grouted to form a first anchor, and the second anchor hole 42 is grouted to form a second anchor.

[0064] Step S008, pouring concrete on the first base 3 to form a second base 8, and the pipeline 7 is poured in the second base 8;

[0065] As shown in Figure 4 and Figure 5 , the plywood template is installed along the first inclined surface 301 of the first base 3 (i.e. the side of the first base 3 away from the second slope 102), the 100*100 mm wooden frame is transversely installed as a secondary beam with a spacing of 500 mm, then the main surrounding beam is installed, 3 rows are arranged along the slope, the template is fixed by installing the tensioning bolts, and finally the slope of the template is adjusted.

[0066] When the template is installed, the C30 concrete is poured in the template to encapsulate the pipeline 7 and the pipeline installation support 11 together to form the second base 8, the side of the second base 8 away from the second slope 102 is provided with a second inclined surface 701, and the first inclined surface 301 and the second inclined surface 701 are flush with each other. The second base 8 protects the pipeline 7, and the distance between the top surface of the second base 8 and the outer wall of the pipeline is at least greater than 300 mm, and the pier is arranged at the turning position when the second base 8 extends, the pier protrudes from the encapsulated concrete surface by 500 mm, and the thickness of the second base 8 is increased at the pier to resist the impact of the water flow and avoid damage to the second base 8 caused by the water flow to affect the normal work of the pipeline 7.

[0067] Step S009, removing the construction road 1 to restore the river.

[0068] When the second base 8 is built, the construction road 1 is removed by excavator, the filling material of the construction road 1 is cleaned, the original riverbed 103 is restored, the stone or gravel is added on the first base 3 and the second base 8 to prevent the river from washing away the foundation of the first base 3 or the second base 8 to cause the pipeline 7 to be broken, the steel bars are added in the first base 3 to prevent the uneven settlement of the ground from affecting the pipeline 7.

[0069] In the implementation process of the embodiment, the first base 3 and the second base 8 are fixed by the first anchor rod 5 and the second anchor rod 6, the structure of the first base 3 and the second base 8 is pulled by the anchor rod, when the river water impacts the first base 3 and the second base 8, the first anchor rod 5 and the second anchor rod 6 can effectively transmit the impact load to the weathered rock layer of the first slope 101 and the second slope 102 and the riverbed 103, the riverbed 103 under the pipeline 7 is prevented from being hollowed out due to the displacement of the base, thereby protecting the pipeline 7. The stone or gravel is added on the first base 3 and the second base 8 to prevent the river from washing away the bottom of the foundation of the pipeline 7, the function of preventing the pipeline 7 from being broken after being washed away is realized, the steel bars are added in the first base 3 to prevent the uneven settlement of the ground from affecting the pipeline 7, the sinking and cracking are avoided, the second base 8 covers the pipeline 7, the pipeline 7 is prevented from being rusted or broken due to the impact of the water flow, and the protection of the pipeline 7 is realized.

[0070] The serial numbers of the above embodiments of the application are only for description, and do not represent the advantages and disadvantages of the embodiments. The above is only the preferred embodiment of the application, and does not limit the patent scope of the application, and any equivalent structure or equivalent process transformation, or direct or indirect application in other related technical fields, is also included in the patent protection scope of the application.

Claims

1. A method of laying a pipeline along a river course, wherein the river comprises a river bed (103) and a first bank (101) and a second bank (102) located on either side of the river bed (103), characterised by, The method for laying pipes along the river course comprises the following steps: Step S001, a construction road (1) is built along the river course, the construction road (1) is built on the riverbed (103) near one side of the second slope (102), and the height of the construction road (1) is higher than the water surface of the river water in the river; Step S002, the construction road (1) is excavated on the side near the second slope (102), and a pouring groove (2) is formed by excavating downwards to the riverbed (103); Step S003, a first base (3) is formed by pouring concrete in the pouring groove (2); Step S004, a pipe (7) is installed above the first base (3), and the pipe (7) extends along the river course; Step S005, a plurality of first anchor holes (41) are drilled along the river course on the first base (3), each first anchor hole (41) extends in the vertical direction and penetrates through the first base (3) to the riverbed (103), a plurality of second anchor holes (42) are drilled along the river course in the second slope (102), each second anchor hole (42) extends in the horizontal direction, and each first anchor hole (41) corresponds to each second anchor hole (42); Step S006, a first anchor rod (5) is installed in each first anchor hole (41), a second anchor rod (6) is installed in each second anchor hole (42), and one end of the second anchor rod (6) exposed from the second slope (102) is tied to the upper end of the first anchor rod (5); Step S007, a first anchor is formed by grouting in each first anchor hole (41), and a second anchor is formed by grouting in each second anchor hole (42); Step S008, a second base (8) is formed by pouring concrete above the first base (3), and the pipe (7) is poured in the second base (8); Step S009, the construction road (1) is removed, and the river is restored.

2. The method of claim 1, wherein, In step S004, before the pipe (7) is installed, a plurality of pipe installation supports (11) are arranged on the first base (3) along the river course, and then the pipe (7) is installed on each pipe installation support (11).

3. The method of claim 2, wherein, The distance between each pipe installation support (11) is 750-850mm, and the height of each pipe installation support (11) is 190-210mm.

4. The method of claim 1, wherein, In step S005, after the first anchor hole (41) and the second anchor hole (42) are drilled, the first anchor hole (41) and the second anchor hole (42) are filled with clean water for washing, and the washing is stopped until the clean water returns from the orifices of the first anchor hole (41) and the second anchor hole (42).

5. The method of laying a pipeline along the course of a river or stream according to claim 1, wherein, The first anchor rod (5) and the second anchor rod (6) are both provided with centering supports (9), which are used to place the first anchor rod (5) at the center of the first anchor hole (41) and the second anchor rod (6) at the center of the second anchor hole (42).

6. The method of laying a pipeline along the course of a river or stream according to claim 1, wherein, The first base (3) is provided with a first inclined surface (301) away from one side of the second slope (102), and the second base (8) is provided with a second inclined surface (701) away from one side of the second slope (102), and the first inclined surface (301) and the second inclined surface (701) are flush with each other.

7. The method of laying a pipeline along the course of a river or stream according to claim 1, wherein, The end of each second anchor rod (6) deeply inserted into the second slope (102) is formed with a hook.

8. The method of laying a pipeline along the course of a river or stream according to claim 1, wherein, The first anchor rod (5) and the second anchor rod (6) are respectively inserted into the first anchoring hole (41) and the second anchoring hole (42) to a depth of not less than 6 m.

9. The method of laying a pipeline along the course of a river or stream according to claim 1, wherein, In step S002, the pouring groove (2) is below the riverbed (103) to a depth (h) of not more than 1 m.

10. The method of laying a pipeline along the course of a river or stream according to claim 5, wherein, The spacing between the first anchor rod (5) and the second anchor rod (6) and the adjacent centering support (9) is between 1.4 m and 1.6 m.

Images