Pipeline trench support structure and pipeline construction methods

Abstract

This invention relates to the field of pipeline construction technology, and discloses a pipeline trench support structure and pipeline construction method. The support structure includes a first baffle, a second baffle, a first support member, a second support member, a first steel perforated pipe, and a second steel perforated pipe. The first and second baffles are respectively tightly attached to the two side walls of the trench, and each baffle has multiple drainage holes. Along the extension direction of the trench, multiple first baffles are spaced apart with first steel perforated pipes inserted in the gaps, and multiple second baffles are spaced apart with second steel perforated pipes inserted in the gaps. The opposing first and second baffles are connected by a first support member, and the opposing first and second steel perforated pipes are connected by a second support member. This invention can reduce the pressure difference between the inner and outer sides of the first and second baffles, thereby strengthening the support structure.

Description

Technical Field

[0001] This invention relates to the field of pipeline construction technology, and in particular to a pipeline trench support structure and pipeline construction method. Background Technology

[0002] Excavating trenches and constructing trench support structures are important aspects of pipeline construction. Support structures are structures that support and reinforce the trench sidewalls and surrounding environment to ensure the safety of underground structures and the surrounding environment of the trench.

[0003] In existing technologies, the support structure is generally a closed steel plate supported on the two side walls of the trench. During the trench excavation process, the outside of the support structure is soil containing groundwater, and the pressure difference between the inside and outside of the support structure is large, which may lead to the instability of the support structure. Summary of the Invention

[0004] The purpose of this invention is to provide a pipeline trench support structure and a pipeline construction method to enhance the stability of the support structure.

[0005] To achieve the above objectives, the present invention provides a pipeline trench support structure, comprising:

[0006] The first baffle is closely attached to one side wall of the trench, and each of the first baffles is spaced apart along the extension direction of the trench.

[0007] The second baffle is closely attached to the other side wall of the trench, and each second baffle is arranged opposite to each first baffle; each first baffle and the second baffle are respectively provided with a plurality of water flow holes to allow groundwater on the outside of the first baffle and the second baffle to be discharged into the trench.

[0008] The first steel pipe is respectively installed in the gap between two adjacent first baffles;

[0009] The second steel pipe is respectively installed in the gap between two adjacent second baffles;

[0010] Each of the first steel pipe and the second steel pipe has a plurality of grouting holes for the concrete inside the first steel pipe and the second steel pipe to seep out through the grouting holes, and at least a portion of the concrete is combined with the surrounding soil.

[0011] The first support member has its two ends connected to the opposite first baffle and the second baffle, respectively.

[0012] The second support member has its two ends connected to the first steel pipe and the second steel pipe that are arranged opposite to each other.

[0013] Furthermore, it also includes a glass cloth that covers the water outlet.

[0014] Furthermore, it also has a first protective plate and a second protective plate, with each end of the first protective plate connected to an adjacent first baffle and a first steel pipe, and each end of the second protective plate connected to an adjacent second baffle and a second steel pipe.

[0015] Furthermore, in the extension direction of the trench, the distance between two adjacent first baffles is no greater than 2000mm, and the distance between two adjacent second baffles is no greater than 2000mm.

[0016] A pipeline construction method, comprising:

[0017] S1: Press each of the first baffles into the soil on one side of the trench in sequence, and press each of the second baffles into the soil on the other side of the trench.

[0018] S2: Drill holes in the soil between two adjacent first baffles and between two adjacent second baffles; insert the first steel pipe and the second steel pipe into each hole in sequence, and perform pressure grouting on each first steel pipe and the second steel pipe.

[0019] S3: Use machinery to excavate trenches from downstream to upstream.

[0020] Furthermore, before step S1, each of the first baffle and the second baffle is wrapped with glass cloth.

[0021] Furthermore, in step S2, the depth to which each of the first baffles and each of the second baffles is pressed into the soil is at least 500 mm greater than the depth of the trench.

[0022] Furthermore, it also includes:

[0023] S4: Drainage ditches are dug on both sides of the trench.

[0024] Furthermore, it also includes:

[0025] S5: Multiple water collection pits are dug in the middle of the trench, and each water collection pit is connected to a drainage pump.

[0026] Furthermore, from downstream to upstream of the trench, the distance between two adjacent sump pits decreases sequentially.

[0027] Compared with the prior art, the beneficial effects of the pipeline trench support structure and pipeline construction method of this invention are as follows: the first baffle and the second baffle are used to support the two side walls of the trench, and the soil between two adjacent first baffles is filled with a first steel pipe, and the soil between two adjacent second baffles is filled with a second steel pipe. At least part of the concrete in the first steel pipe and the second steel pipe is combined with the surrounding soil to reinforce the soil. The reinforced soil can cooperate with the first baffle and the second baffle to form a trench support structure to prevent collapse.

[0028] Each of the first and second baffles is equipped with multiple drainage holes to allow groundwater outside the first and second baffles to drain into the trench. This reduces the pressure exerted by the soil on the first and second baffles, and decreases the pressure difference between the inner and outer sides of the first and second baffles, thereby enhancing the stability of the support structure. Furthermore, the two ends of the first support member are connected to the opposing first and second baffles, and the two ends of the second support member are connected to the opposing first and second steel perforated pipes. This strengthens the support force on the inner sides of the first and second baffles, and the first and second steel perforated pipes, further reinforcing the support structure. Attached Figure Description

[0029] Figure 1 This is a front view of the support structure according to an embodiment of the present invention;

[0030] Figure 2 This is a top view of the support structure according to an embodiment of the present invention;

[0031] Figure 3 This is a structural diagram of the second baffle according to an embodiment of the present invention;

[0032] Figure 4 This is a structural diagram of the pipeline construction process in the later stages of an embodiment of the present invention;

[0033] In the diagram, 100 is the support structure; 1 is the first baffle; 2 is the second baffle; 21 is the drainage hole; 3 is the first support member; 4 is the second support member; 5 is the first steel perforated pipe; 6 is the second steel perforated pipe; 7 is the first protective plate; 8 is the second protective plate; 9 is the drainage ditch; 10 is the trench; 11 is the soil; 12 is the gravel layer; 13 is the concrete layer; 14 is the backfill material; and 15 is the pipeline. Detailed Implementation

[0034] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0035] like Figures 1 to 4As shown in the preferred embodiment of the present invention, a pipeline trench support structure 100 includes a first baffle 1, a second baffle 2, a first support member 3, a second support member 4, a first steel perforated pipe 5, and a second steel perforated pipe 6. The first baffle 1 is closely attached to one side wall of the trench 10, and each first baffle 1 is spaced apart along the extension direction of the trench 10. The second baffle 2 is closely attached to the other side wall of the trench 10, and each second baffle 2 is opposite to each first baffle 1. Each first baffle 1 and second baffle 2 is used to support the two side walls of the trench 10. Each first baffle 1 and second baffle 2 is provided with a plurality of drainage holes 21 to allow groundwater outside the first baffle 1 and second baffle 2 to drain into the trench 10. The first steel pipe 5 is respectively disposed in the gap between two adjacent first baffles 1, and the second steel pipe 6 is respectively disposed in the gap between two adjacent second baffles 2. Each of the first steel pipe 5 and the second steel pipe 6 has multiple grouting holes for allowing the concrete inside the first steel pipe 5 and the second steel pipe 6 to seep out through the grouting holes, and at least a portion of the concrete is bonded to the surrounding soil 11. The two ends of the first support member 3 are respectively connected to the opposite first baffles 1 and second baffles 2, and the two ends of the second support member 4 are respectively connected to the opposite first steel pipe 5 and second steel pipe 6.

[0036] Based on this, in this embodiment of the invention, each first baffle 1 and second baffle 2 is provided with a plurality of water flow holes 21. Each water flow hole 21 is used to drain the groundwater outside the first baffle 1 and the second baffle 2 to the trench 10, so as to reduce the pressure of the soil on the first baffle 1 and the second baffle 2 on both sides, reduce the pressure difference between the first baffle 1 and the second baffle 2, and thus strengthen the stability of the support structure 100.

[0037] The two ends of the first support member 3 are respectively connected to the opposite first baffle 1 and the second baffle 2, and the two ends of the second support member 4 are respectively connected to the opposite first steel pipe 5 and the second steel pipe 6. This can strengthen the support force inside the first baffle 1, the second baffle 2, the first steel pipe 5 and the second steel pipe 6, and further reinforce the support structure 100.

[0038] Furthermore, a first steel pipe 5 is inserted into the soil 11 between two adjacent first baffles 1, and a second steel pipe 6 is inserted into the soil 11 between two adjacent second baffles 2. At least a portion of the concrete inside the first steel pipe 5 and the second steel pipe 6 combines with the surrounding soil 11, thus reinforcing the soil 11. The reinforced soil 11 can cooperate with the first baffles 1 and the second baffles 2 to form the trench 10 support structure 100 to prevent collapse. Utilizing the reinforcing capacity of concrete to reinforce part of the soil 11 not only further strengthens the support structure 100, but also allows the first baffles 1 and the second baffles 2 to be spaced apart along the extension direction of the trench 10, thus saving materials for the first baffles 1 and the second baffles 2.

[0039] Furthermore, the pipe 15 trench 10 support structure 100 of this embodiment of the invention also has a glass cloth, which covers the water flow hole 21. Groundwater can pass through the glass cloth, but fine sand cannot pass through the glass cloth, thereby preventing fine sand on the outside of the first baffle 1 and the second baffle 2 from entering the trench 10, avoiding the occurrence of flowing sand in the trench 10, and preventing the accumulation of fine sand in the trench 10.

[0040] Furthermore, the pipe 15 trench 10 support structure 100 of this embodiment of the invention also has a first protective plate 7 and a second protective plate 8. The two ends of each first protective plate 7 are respectively connected to the adjacent first baffle 1 and the first steel perforated pipe 5, and the two ends of each second protective plate 8 are respectively connected to the adjacent second baffle 2 and the second steel perforated pipe 6. In this way, the first protective plate 7, the first baffle 1 and the first steel perforated pipe 5 form an integral whole, so that the deformation characteristics of the first baffle 1 and the first steel perforated pipe 5 change from bearing bending moment individually to bearing bending moment as a whole. The second protective plate 8, the second baffle 2 and the second steel perforated pipe 6 form an integral whole, so that the deformation characteristics of the second baffle 2 and the second steel perforated pipe 6 change from bearing bending moment individually to bearing bending moment as a whole. This enhances the bending and shear resistance of the support structure 100, thereby further strengthening the support structure 100. Furthermore, the two ends of each first protective plate 7 are detachably connected to the first steel pipe 5 and the first baffle 1 respectively via fasteners, and the two ends of each second protective plate 8 are detachably connected to the second steel pipe 6 and the second baffle 2 respectively via fasteners. After construction is completed, both the first protective plate 7 and the second protective plate 8 can be recycled.

[0041] Furthermore, to enhance the stability of the support structure 100, in the extension direction of the trench 10, the distance between two adjacent first baffles 1 is no greater than 2000mm, and the distance between two adjacent second baffles 2 is no greater than 2000mm.

[0042] The present invention also provides a method for constructing pipeline 15, which specifically includes:

[0043] S1: Press each of the first baffles 1 into the soil 11 located on one side of the trench 10 in sequence, and press each of the second baffles 2 into the soil 11 located on the other side of the trench 10.

[0044] S2: Drill holes in the soil 11 between two adjacent first baffles 1 and between two adjacent second baffles 2, insert the first steel pipe 5 and the second steel pipe 6 into each hole in sequence, and perform pressure grouting on each first steel pipe 5 and the second steel pipe 6.

[0045] S3: Use machinery to excavate a trench 10 from downstream to upstream.

[0046] Before the first baffle 1 and the second baffle 2 are pressed into the soil 11, each baffle 1 and the second baffle 2 needs to be wrapped with fiberglass cloth. This allows groundwater outside the first baffle 1 and the second baffle 2 to flow into the trench 10 through the drainage holes 21 during the excavation of the trench 10, while fine sand is blocked outside the first baffle 1 and the second baffle 2, preventing quicksand accumulation in the trench 10. Furthermore, the excavation of the trench 10 proceeds from downstream to upstream to keep the excavation surface free of water and improve construction efficiency.

[0047] Furthermore, in step S2, the depth to which each of the first baffles 1 and each of the second baffles 2 is pressed into the soil 11 is at least 500 mm greater than the depth of the trench 10, thereby making the first baffles 1 and the second baffles 2 more stable.

[0048] Furthermore, the construction method of the pipeline 15 in this embodiment of the invention also includes S4: excavating drainage ditches 9 on both sides of the trench 10. Both drainage ditches 9 are used to collect and drain groundwater, ensuring smooth drainage within the trench 10. Groundwater mainly overflows from the outside of the first baffle 1, the outside of the second baffle 2, the upstream of the trench 10, and the bottom of the trench 10, and flows downstream of the trench 10. The pipeline 15 is buried in the middle of the trench 10, while the drainage ditches 9 are placed at both edges of the trench 10, guiding groundwater to collect at the edges of the trench 10, preventing quicksand from forming in the middle of the trench 10, and avoiding quicksand accumulation in the middle of the trench 10.

[0049] Furthermore, the pipeline construction method of this embodiment of the invention also includes S5: excavating multiple water collection pits in the middle of the trench 10, each water collection pit being connected to a drainage pump. The water collection pits are used to collect groundwater in the middle of the trench 10, and the drainage pumps are used to remove the groundwater, ensuring that there is no water accumulation at the bottom of the trench 10, thus facilitating smooth construction. To accelerate drainage, the number of water collection pits can be increased and their positions can be rationally arranged. Specifically, multiple water collection pits can be arranged in a rectangular shape at the bottom of the trench 10 to form a rectangular water collection pit group, or multiple water collection pits can be arranged in a triangular shape at the bottom of the trench 10 to form a triangular water collection pit group, with the multiple rectangular water collection pit groups or multiple triangular water collection pit groups spaced apart along the length of the trench 10.

[0050] Generally, the groundwater in the upstream area is more abundant than that in the downstream area. In order to further accelerate the construction and ensure that there is no water accumulation at the bottom of the trench 10, the distance between two adjacent water collection pits can be gradually reduced from the downstream to the upstream direction of the trench 10.

[0051] Furthermore, the construction method for pipeline 15 in this embodiment of the invention also includes:

[0052] S6: Connect a first protective plate 7 between adjacent first baffle 1 and first steel pipe 5, and connect a second protective plate 8 between adjacent second baffle 2 and second steel pipe 6 to reinforce the support structure 100.

[0053] S7: Connect a first support member 3 between the opposing first baffle 1 and the second baffle 2, and connect a second support member 4 between the opposing first steel pipe 5 and the second steel pipe 6, thereby further reinforcing the support structure 100.

[0054] S8: A gravel layer 12 is laid at the bottom of the trench 10, the gravel layer 12 avoiding the drainage ditch 9, and a concrete layer 13 is laid on the gravel layer 12. A pipe 15 is installed on the concrete layer 13. The gravel layer 12 and the concrete layer 13 are used to prevent the pipe 15 from being displaced or damaged due to stress, to ensure the stability of the upper roadbed or other structures, and to avoid uneven settlement.

[0055] S9: Remove the first protective plate 7, the second protective plate 8, and each of the first support member 3 and the second support member 4, and backfill the trench 10 with backfill material 14.

[0056] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A pipeline trench support structure, characterized in that, include: The first baffle is closely attached to one side wall of the trench, and each of the first baffles is spaced apart along the extension direction of the trench. The second baffle is closely attached to the other side wall of the trench, and each second baffle is arranged opposite to each first baffle; each first baffle and the second baffle are respectively provided with a plurality of water flow holes to allow groundwater on the outside of the first baffle and the second baffle to be discharged into the trench. The first steel pipe is respectively installed in the gap between two adjacent first baffles; The second steel pipe is respectively installed in the gap between two adjacent second baffles; Each of the first steel pipe and the second steel pipe has a plurality of grouting holes for the concrete inside the first steel pipe and the second steel pipe to seep out through the grouting holes, and at least a portion of the concrete is combined with the surrounding soil. The first support member has its two ends connected to the opposite first baffle and the second baffle, respectively. The second support member has its two ends connected to the first steel pipe and the second steel pipe that are arranged opposite to each other. It also has a first protective plate and a second protective plate, with each end of the first protective plate connected to an adjacent first baffle and a first steel pipe, and each end of the second protective plate connected to an adjacent second baffle and a second steel pipe.

2. The pipeline trench support structure according to claim 1, characterized in that, It also has a glass cloth that covers the water outlet.

3. The pipeline trench support structure according to claim 1, characterized in that, In the direction of the trench's extension, the distance between two adjacent first baffles is no greater than 2000mm, and the distance between two adjacent second baffles is no greater than 2000mm.

4. A pipeline construction method, characterized in that, The pipeline trench support structure as described in claim 1 comprises: S1: Press each of the first baffles into the soil on one side of the trench in sequence, and press each of the second baffles into the soil on the other side of the trench. S2: Drill holes in the soil between two adjacent first baffles and between two adjacent second baffles; insert the first steel pipe and the second steel pipe into each hole in sequence, and perform pressure grouting on each first steel pipe and the second steel pipe. S3: Use machinery to excavate trenches from downstream to upstream.

5. The pipeline construction method according to claim 4, characterized in that, Before step S1, wrap each of the first baffle and the second baffle with glass cloth.

6. The pipeline construction method according to claim 4, characterized in that, In step S2, the depth to which each of the first baffles and each of the second baffles is pressed into the soil is at least 500 mm greater than the depth of the trench.

7. The pipeline construction method according to claim 4, characterized in that, Also includes: S4: Drainage ditches are dug on both sides of the trench.

8. The pipeline construction method according to claim 7, characterized in that, Also includes: S5: Multiple water collection pits are dug in the middle of the trench, and each water collection pit is connected to a drainage pump.

9. The pipeline construction method according to claim 8, characterized in that, From downstream to upstream of the trench, the distance between two adjacent sump pits decreases sequentially.

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