A complex underground pipeline protection construction method

Abstract

The application discloses a kind of complex underground pipeline protection construction methods, including building channel steel, pouring ground, build replacement support device and it is handled to realize waterproofness.Therein, first build channel steel is used to support pipeline, make preparation for building replacement support device, carry out first pouring to guarantee the waterproofness of building to the pipeline below and surrounding area.When replacement support device is built and passes acceptance, remove channel steel, and carry out secondary pouring, realize the waterproofness below pipeline.When building foundation raft and pouring, cut off the vertical rod below replacement support device, carry out filling light construction, realize the waterproofness of building.The application builds channel steel and replacement support device, not only protects the pipeline underground, but also lets construction proceed normally, avoids waste of manpower and financial resources.Through pouring treatment, realize the integrity of building waterproof, guarantee the safety of building.

Description

Technical Field

[0001] This invention relates to the relocation of underground pipelines, and particularly to a construction method for the protection of complex underground pipelines. Background Technology

[0002] During underground construction in cities, numerous complex pipelines are encountered during excavation, such as utility lines, high-voltage cables, main water supply pipes, and main sewage pipes. These need to be protected before relocation to prevent damage and inconvenience. In the case of a substation under construction, an airport's main communication line exists within the main outline of the project, and its relocation cannot be completed before project completion. This pipeline is a vital airport communication line; failure to implement comprehensive technical measures for its protection will disrupt the normal operation of the airport terminal area. Furthermore, neglecting pipeline protection will delay the project, resulting in wasted human and financial resources. Compared to existing technologies, this invention maximizes on-site construction efficiency, avoiding the difficulties caused by unrelocated pipelines. Combined with waterproofing design requirements, this method ensures uninterrupted foundation waterproofing, minimizing the risk of leakage. Additionally, this technology shortens the construction period, preventing idle time and extended construction costs due to pipeline issues, thus avoiding waste of human and financial resources. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention provides a construction method for protecting complex underground pipelines, which is implemented as follows:

[0004] A construction method for protecting complex underground pipelines includes the following steps:

[0005] S1. Before excavating the trench, determine the specific location and direction of the pipeline (2). After the earthwork is excavated to the top elevation of the pipeline (2), drive the vertical channel steel (3) into the soil along both sides of the extension direction of the pipeline (2). After excavating around the pipeline (2) to the bottom elevation of the pipeline (2), weld the horizontal channel steel (4) onto the vertical channel steel (3) on the upper and lower surfaces of the pipeline (2).

[0006] S2, the first pouring is carried out on the area below and around the pipeline (2), wherein the finished surface of the pouring below the pipeline (2) is lower than the finished surface of the area around the pipeline (2), and the finished surface of the area below the pipeline (2) is defined as the bottom (100) of the waterproof construction finished surface, and the finished surface of the area around the pipeline is defined as the elevation (110) of the waterproof construction finished surface. After the pouring is completed, a replacement support device (30) is built on the pouring surface, wherein the replacement support device (30) is used to stably support the pipeline (2);

[0007] S3, after the replacement support device (30) passes the acceptance test, the vertical channel steel (3) and the horizontal channel steel (4) are removed, and then the area below the pipeline (2) is poured a second time, with the pouring surface level with the elevation (110) of the completed waterproofing surface.

[0008] S4. After the area below the pipeline (2) is poured, a foundation raft slab (15) is built. Concrete is used to integrally pour the bottom of the foundation raft slab (15) and the support device (30), wherein the pouring height is the foundation raft slab elevation (120).

[0009] S5. After the pipeline (2) is relocated, a portion of the support pole of the replacement device (30) on the foundation raft elevation (120) is cut off, the steel pipe in the concrete is grouted a second time, and the ground is finished.

[0010] The beneficial effects of this invention are:

[0011] First, vertical and horizontal channel steel supports are erected to hold the pipeline in place. Then, concrete is poured around and below the pipeline, with the area below the pipeline having a lower pouring height than the surrounding area. After pouring, a replacement support device is erected. Once the replacement support device passes inspection, a second pouring is performed on the area below the pipeline to achieve waterproofing. Two layers of foundation raft slabs are then built and poured under the replacement support device. After the pipeline is relocated, the bottom of the replacement support device is removed, and secondary grouting and finishing are performed to achieve waterproofing. This underground pipeline protection construction method not only protects the underground pipeline but also ensures the normal operation of the construction process. Attached Figure Description

[0012] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0013] Figure 1 This is a cross-sectional view of the channel steel of the present invention;

[0014] Figure 2 This is an elevation view of the channel steel of the present invention;

[0015] Figure 3 This is a cross-sectional view of the channel steel and the support replacement device of the present invention;

[0016] Figure 4 This is a cross-sectional view of the support replacement device of the present invention;

[0017] Figure 5 This is an elevation view of the support replacement device of the present invention;

[0018] Figure 6 This is a full sectional view of the waterproof sleeve of the present invention;

[0019] Figure 7This is a perspective view of the waterproof sleeve of the present invention;

[0020] In the diagram: 2. Pipeline; 3. Vertical channel steel; 4. Horizontal channel steel;

[0021] 9. Replacement support unit;

[0022] 91. Fixed upright; 92. Vertically fixed upright; 93. First fixed horizontal bar; 94. Second fixed horizontal bar; 95. Third fixed horizontal bar; 96. Reinforcing diagonal bar; 97. Waterproof sleeve; 98. Concrete test block;

[0023] 971. Casing body; 972. Inner bore of casing body; 973. First boss; 974. Second step; 975. Cavity; 976. Support plate;

[0024] 10. Connecting crossbars; 15. Foundation raft slab;

[0025] 30. Support replacement device;

[0026] 100. Waterproofing completion surface elevation; 110. Waterproofing completion surface elevation; 120. Foundation raft slab elevation; Detailed Implementation

[0027] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0028] In the attached diagram, all identical reference numerals refer to the same components.

[0029] like Figure 1-7 As shown, the present invention provides a method for constructing the foundation of a building containing complex underground pipelines. In this embodiment, the building to be constructed is a substation, and it is necessary to ensure the waterproofness of the constructed building. The main focus of this method is to waterproof the ground.

[0030] The construction method for the main foundation of a building containing complex underground pipelines includes:

[0031] S1. Before excavating the trench, determine the specific location and direction of the pipeline 2. After the earthwork is excavated to the top elevation of the pipeline 2, drive the vertical channel steel 3 into the soil along both sides of the extension direction of the pipeline 2. After excavating around the pipeline 2 to the bottom elevation of the pipeline 2, weld the horizontal channel steel 4 onto the vertical channel steel 3 on the upper and lower surfaces of the pipeline 2.

[0032] S2, the first pouring is carried out on the area below and around the pipeline 2, wherein the finished surface of the pouring below the pipeline 2 is lower than the finished surface of the area around the pipeline 2, and the finished surface of the area below the pipeline 2 is defined as the waterproof construction finished surface elevation 100, and the finished surface of the area around the pipeline is defined as the waterproof construction finished surface elevation 110. After the pouring is completed, a replacement support device 30 is erected on the pouring surface, wherein the replacement support device 30 is used to stably support the pipeline 2.

[0033] S3, after the replacement support device 30 passes the acceptance test, the vertical channel steel 3 and the horizontal channel steel 4 are removed, and then a second pour is carried out on the area below the pipeline 2, with the pouring surface being flush with the elevation 110 of the completed waterproofing surface.

[0034] S4. After the area below the pipeline 2 is poured, the foundation raft 15 is built. The foundation raft 15 and the bottom of the support device 30 are poured together with concrete, and the pouring height is 120 mm above the foundation raft elevation.

[0035] S5. After the pipeline 2 is relocated, a portion of the upright of the replacement support device 30 on the foundation raft elevation 120 is cut off, the steel pipe in the poured concrete is grouted a second time, and the ground is finished.

[0036] Furthermore, in step S1, after excavating the earth to the top elevation of the pipeline 2, the vertical channel steel 3 is driven into the soil at least 1 meter deep along both sides of the pipeline 2, and the spacing between the channel steels along both sides of the pipeline 2 is 1.5 to 2.5 meters. In one embodiment, after excavating the earth to the top elevation of the pipeline 2, the vertical channel steel 3 is driven into the soil at least 1 meter deep along both sides of the pipeline 2 for fixation. The spacing between the channel steels along both sides of the pipeline 2 is 2 meters to ensure the stability of the pipeline after the foundation trench is excavated. The vertical channel steel 3 and the horizontal channel steel 4 are erected to support the pipeline 2 and prepare for the erection of the support replacement device 30.

[0037] Furthermore, in step S2, the height of the poured surface in the area below the pipeline 2 is 8-12cm, and the height of the poured surface in the area surrounding the pipeline 2 is 16-18cm. The height difference of 5-10cm is the height of the second pour, thus preventing water leakage in the area below the pipeline 2. In one embodiment, during the first pour, the height of the waterproofing completion surface elevation 100 in the area below the pipeline 2 is 10cm, and the height of the waterproofing completion surface elevation 110 in the area surrounding the pipeline 2 is 17cm. The 7cm height difference requires a subsequent second pour to prevent water leakage in the area below the pipeline 2. Tests have shown that if the height difference is too large, the strength of the poured surface in the area below the pipeline 2 will be too low, making it easy for the vertical channel steel 3 to damage the bottom cement during use, ultimately affecting the waterproofing effect. Furthermore, if the height difference is too small, when the vertical channel steel 3 is subsequently cut and removed, the top of the vertical channel steel 3 will be close to the elevation 110 of the completed waterproofing surface, making it easy for water to seep upwards along the vertical channel steel 3, which will also affect the final waterproofing effect.

[0038] Furthermore, in step S3, the support replacement device includes multiple support replacement units 9 spaced apart and connecting crossbars 10 connected between the support replacement units 9. Each support replacement unit 9 includes: fixed uprights 91 disposed on the left and right surfaces of the pipeline 2, vertical fixed uprights 92 disposed on the left and right sides of the pipeline 2, a first fixed crossbar 93 and a second fixed crossbar 94 fixed on the vertical fixed uprights 92 and respectively located on the upper and lower sides of the pipeline 2, a third fixed crossbar 95 fixed below the vertical fixed uprights 92, a reinforcing diagonal bar 96 connecting the vertical fixed uprights 92 and the fixed crossbars, and a concrete test block 98 disposed at the bottom of the vertical fixed uprights 92.

[0039] As a further improvement, in step S4, the foundation raft slab 15 is constructed by fixing reinforcing bars with cable ties at intervals of 13-16cm in both the longitudinal and transverse directions. The foundation raft slab 15 has a first layer at an elevation of 110 on the completed waterproofing surface, and a second layer is constructed 0.4-0.8m above the first layer. The second layer is erected after the first layer is completed. In one embodiment, the foundation raft slab 15 is constructed by fixing reinforcing bars with cable ties at intervals of 15cm in both the longitudinal and transverse directions. The foundation raft slab 15 has a first layer at an elevation of 110 on the completed waterproofing surface, and a second layer is constructed 0.5m above the first layer. The second layer is erected after the first layer is completed. The two layers of the foundation raft slab 15 form the foundation of this substation building and should ensure the waterproofing of the building.

[0040] Furthermore, the support unit 9 further includes a waterproof sleeve 97 disposed between the bottom of the vertical fixed pole 92 and the concrete test block 98. The waterproof sleeve 97 includes: a sleeve body 971, an inner hole 972 of the sleeve body, a first boss 973 disposed in the middle of the outer wall of the sleeve body 971, and a second step 974 disposed in the middle of the inner wall of the sleeve body 971. A cavity 975 is defined between the second step 974 and the sleeve body 971, facing the bottom of the sleeve body 971. The cavity 975 is used to prevent water from overflowing upwards from the bottom. A support plate 976 is disposed at the bottom of the sleeve body 971. In one embodiment, the support plate 976 has multiple grooves on its contact surface with the ground to increase friction with the ground, evenly distributed fixing holes around its perimeter, and reinforcing ribs on its upper surface where it contacts the sleeve body. The diameter of the inner hole 972 of the sleeve body is larger than that of the vertical fixed pole 92. The second step 974 is used to support the vertical fixed pole 92. The first boss 973 is used to strengthen the support force. The cavity 975 extends downward. When water overflows from underground, it will rise along the inner wall of the sleeve body 971 and flow down from the outer wall of the cavity 975, without overflowing from the inner wall of the cavity 975, thus achieving waterproofing.

[0041] The sleeve body 971 has a diameter of 50mm and a wall thickness of 2mm. The inner hole 972 of the sleeve body has a diameter of 46mm. The first boss 973 has a diameter of 65mm and a height of 15mm. The support plate 976 has a diameter of 90mm and a height of 10mm. The cavity 975 has a diameter of 35mm and extends downwards by 50mm. The diameter of the inner hole 972 of the sleeve body is larger than and compatible with the vertical fixing rod 92. A suitable waterproof sleeve 97 is selected based on the size of the inner hole 972 of the sleeve body.

[0042] As a further improvement, in step S5, after the pipeline 2 is relocated, a portion of the upright of the replacement support device 30 at the foundation raft elevation 120 is cut off, secondary grouting is performed on the steel pipe in the poured concrete, and the ground is finished. In one embodiment, the portion of the vertical fixed upright 92 between the foundation raft elevation 120 and the connecting horizontal bar 10 is cut off. Secondary grouting is performed on the steel pipe in the poured concrete, and the ground is finished to achieve waterproof integrity and ensure the safety of the constructed substation.

[0043] Furthermore, the vertical fixed pole 92 is 0.4 to 0.6 m away from the pipeline 2. In one embodiment, the vertical fixed pole 92 is 0.5 m away from the pipeline 2.

[0044] Furthermore, the height of the concrete test block 98 is 140-160mm. In one embodiment, the concrete test block 98 is a seepage-resistant test block with good waterproof performance, and has a length, width, and height of 150mm. The length and width of the concrete test block 98 are 100mm larger than the diameter of the sleeve body 971, which is suitable for placing the waterproof sleeve 97. It is not too small to support the waterproof sleeve 97, nor too large to cause inconvenience. The height allows the waterproof sleeve 97 to have an appropriate distance from the ground. If the height is too low, water from the ground can easily seep into the waterproof sleeve 97, thus isolating it and achieving waterproofing. If the height is too high, it can easily cause the vertical fixing rod 92 to be unstable.

[0045] Furthermore, the support replacement units 9 are arranged in groups at intervals of 1.4 to 1.6 meters. In one embodiment, the support replacement units 9 are arranged in groups at intervals of 1.5 meters. Experiments show that when the intervals of the support replacement units 9 are too large, it is easy to cause instability in the support of the pipeline 2; when the intervals are too small, it is easy to cause waste of materials and labor.

[0046] Furthermore, the third fixed crossbar 95 is positioned at a distance of 1.2 to 1.4 meters from the finished waterproofing surface elevation 110. In one embodiment, the distance between the third fixed crossbar 95 and the finished waterproofing surface elevation 110 is 1.4 meters. Experiments show that when the distance is too high, the center of gravity of the support unit 9 is easily too high, causing instability; when the distance is too low, it easily interferes with the foundation raft slab. Connecting the third fixed crossbar 95 with the reinforcing diagonal bar 96 and the connecting crossbar 10, balancing the forces received in multiple directions, is more conducive to the balance of the support unit 9.

[0047] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the invention by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the invention should be included within the scope of protection of the invention.

Claims

1. A method for constructing the foundation of a building containing complex underground pipelines, characterized in that, Includes the following steps: S1. Before excavating the trench, determine the specific location and direction of the pipeline (2). After the earthwork is excavated to the top elevation of the pipeline (2), drive the vertical channel steel (3) into the soil along both sides of the extension direction of the pipeline (2). After excavating around the pipeline (2) to the bottom elevation of the pipeline (2), weld the horizontal channel steel (4) onto the vertical channel steel (3) on the upper and lower surfaces of the pipeline (2). S2, the first pouring is carried out on the area below and around the pipeline (2), wherein the finished surface of the pouring below the pipeline (2) is lower than the finished surface of the area around the pipeline (2), and the finished surface of the area below the pipeline (2) is defined as the bottom elevation (100) of the waterproof construction finished surface, and the finished surface of the area around the pipeline is defined as the elevation (110) of the waterproof construction finished surface. After the pouring is completed, a replacement support device (30) is built on the pouring surface, wherein the replacement support device (30) is used to stably support the pipeline (2). S3, after the replacement support device (30) passes the acceptance test, the vertical channel steel (3) and the horizontal channel steel (4) are removed, and then the area below the pipeline (2) is poured a second time. The pouring surface is flush with the elevation (110) of the waterproof construction completed surface. Each replacement support device (30) includes multiple replacement support units (9) arranged at intervals. The replacement support unit (9) includes fixed uprights (91) set on the left and right surfaces of the pipeline (2), vertical fixed uprights (92) set on the left and right sides of the pipeline (2); a first fixed horizontal bar (93) and a second fixed horizontal bar (94) fixed on the vertical fixed uprights (92) and located on the upper and lower sides of the pipeline (2); a third fixed horizontal bar (95) fixed below the vertical fixed uprights (92); a reinforcing diagonal bar (96) connected between the vertical fixed uprights (92) and the fixed horizontal bars; and a concrete test block (98) set at the bottom of the vertical fixed uprights (92). S4. After the area below the pipeline (2) is poured, the foundation raft slab (15) is built. The bottom of the foundation raft slab (15) and the replacement support device (30) are poured together with concrete, and the pouring height is the foundation raft slab elevation (120). S5. After the pipeline (2) is relocated, a portion of the support pole of the replacement device (30) on the foundation raft elevation (120) is cut off, the steel pipe in the concrete is grouted a second time, and the ground is finished.

2. The method for constructing the foundation of a building containing complex underground pipelines as described in claim 1, characterized in that, In step S1, after the earthwork is excavated to the top elevation of the pipeline (2), the vertical channel steel (3) is driven into the soil at least 1m along both sides of the pipeline (2) and the spacing between the vertical channel steel (3) along both sides of the pipeline (2) is 1.5~2.5m.

3. The method for constructing the foundation of a building containing complex underground pipelines as described in claim 1, characterized in that, In step S2, during the first pouring, the height of the pouring surface in the area below the pipeline (2) is 8~12cm, and the height of the pouring surface in the area around the pipeline (2) is 16~18cm. The height difference of 5~10cm is the height of the second pouring, to prevent water leakage in the area below the pipeline (2).

4. The method for constructing the foundation of a building containing complex underground pipelines as described in claim 1, characterized in that, In step S4, the foundation raft slab (15) is formed by fixing the steel bars with cable ties at intervals of 13~16cm in the longitudinal and transverse directions. The foundation raft slab (15) has a first layer at the elevation (110) of the completed waterproofing surface, and a second layer is built 0.4~0.8m above the first layer. The second layer is built after the first layer is completed.

5. The method for constructing the foundation of a building containing complex underground pipelines as described in claim 1, characterized in that, The replacement support unit (9) further includes a waterproof sleeve (97) disposed between the bottom of the vertical fixed pole (92) and the concrete test block (98), the waterproof sleeve (97) comprising: Casing body (971); casing body inner hole (972); The first protrusion (973) is disposed in the middle of the outer wall of the sleeve body (971); A second step (974) is provided in the middle of the inner wall of the sleeve body (971), wherein a cavity (975) is defined between the second step (974) and the sleeve body (971) facing the bottom of the sleeve body (971), the cavity (975) is used to prevent water from overflowing upwards from the bottom; a support plate (976) is provided at the bottom of the sleeve body (971).

6. The method for constructing the foundation of a building containing complex underground pipelines as described in claim 1, characterized in that, The distance between the vertical fixed pole (92) and the pipeline (2) is 0.4~0.6m.

7. The method for constructing the foundation of a building containing complex underground pipelines as described in claim 1, characterized in that, The height of the concrete test block (98) is 140~160mm.

8. The method for constructing the foundation of a building containing complex underground pipelines as described in claim 1, characterized in that, The replacement support unit (9) is set up at intervals of 1.4~1.6m.

9. The method for constructing the foundation of a building containing complex underground pipelines as described in claim 1, characterized in that, The third fixed crossbar (95) is 1.2~1.4m away from the elevation (110) of the completed waterproofing surface.

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