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CN-117005451-B - Protection construction method for complex underground pipeline

CN117005451BCN 117005451 BCN117005451 BCN 117005451BCN-117005451-B

Abstract

The invention discloses a complex underground pipeline protection construction method which comprises the steps of constructing channel steel, pouring the ground, constructing a support changing device and processing the support changing device to realize waterproofness. Firstly, constructing channel steel for supporting a pipeline, preparing for constructing a support changing device, and performing first pouring on the lower part and the peripheral area of the pipeline to ensure the waterproofness of the building. And after the support changing device is built and accepted, removing the channel steel, and performing secondary pouring to realize the waterproofness below the pipeline. After the foundation raft is built and poured, the upright rods below the support changing device are cut off, and pouring and light harvesting construction is carried out, so that the waterproof performance of the building is realized. According to the invention, through building the channel steel and the support changing device, not only is the underground pipeline protected, but also the construction is normally carried out, and the waste of manpower and financial resources is avoided. Through pouring treatment, the waterproof integrity of the building is realized, and the safety of the building is ensured.

Inventors

  • YANG JIAMING
  • PENG ZHENFENG
  • YU HAIYANG
  • HE QIANGLONG
  • GUO JIANGLONG
  • XIE BIN

Assignees

  • 中国建筑第四工程局有限公司
  • 中建四局建设发展有限公司

Dates

Publication Date
20260512
Application Date
20230811

Claims (9)

  1. 1. The construction method of the building main foundation containing the complex underground pipeline is characterized by comprising the following steps of: S1, determining the specific position and trend of a pipeline (2) before excavating a ditch, digging a vertical channel steel (3) into soil along two side surfaces of the extending direction of the pipeline (2) after earth excavation reaches the elevation of the top of the pipeline (2), and welding a transverse channel steel (4) on the vertical channel steel (3) on the upper surface and the lower surface of the pipeline (2) after the periphery of the pipeline (2) is excavated to the elevation of the bottom of the pipeline (2); S2, pouring the lower part and the peripheral area of the pipeline (2) for the first time, wherein the pouring completion surface of the lower part of the pipeline (2) is lower than the completion surface of the peripheral area of the pipeline (2), the completion surface of the lower part of the pipeline (2) is defined as a waterproof construction completion surface mark bottom (100), the completion surface of the peripheral area is a waterproof construction completion surface elevation (110), and a support replacing device (30) is built on the pouring surface after the pouring is completed, wherein the support replacing device (30) is used for stably supporting the pipeline (2); S3, removing the vertical channel steel (3) and the transverse channel steel (4) after the support replacing device (30) is accepted, then carrying out secondary pouring on the area below the pipeline (2), wherein the pouring surface is flush with the elevation (110) of the waterproof construction completion surface, each support replacing device (30) comprises a plurality of support replacing units (9) which are arranged at intervals, each support replacing unit (9) comprises fixed vertical rods (91) arranged on the left surface and the right surface of the pipeline (2), vertical fixed vertical rods (92) arranged on the left side and the right side of the pipeline (2), a first fixed cross rod (93) and a second fixed cross rod (94) which are fixed on the vertical fixed vertical rods (92) and respectively positioned on the upper side and the lower side of the pipeline (2), a third fixed cross rod (95) fixed below the vertical fixed vertical rods (92), a reinforcing diagonal rod (96) connected between the vertical fixed vertical rods (92) and the fixed cross rods, and a concrete test block (98) arranged at the bottom of the vertical fixed vertical rods (92); S4, building a foundation raft (15) after pouring of the area below the pipeline (2) is completed, and integrally pouring the bottoms of the foundation raft (15) and the support changing device (30) by using concrete, wherein the pouring height is the elevation (120) of the foundation raft; S5, after the pipeline (2) is removed and changed, cutting off a part of the vertical rod of the support changing device (30) on the elevation (120) of the foundation raft, performing secondary grouting on a steel pipe in the poured concrete, and performing light receiving construction treatment on the ground.
  2. 2. The construction method of the building main foundation with the complex underground pipeline according to claim 1, wherein in the step S1, after earth excavation is performed to the top elevation of the pipeline (2), the vertical channel steel (3) is driven into the earth by at least more than 1m along the two side surfaces of the extending direction of the pipeline (2), and the distance between the two side surfaces of the vertical channel steel (3) along the pipeline (2) is 1.5-2.5 m.
  3. 3. The method for constructing a foundation of a building body containing a complex underground pipeline according to claim 1, wherein in the step S2, the height of the casting surface of the area under the pipeline (2) is 8-12 cm, the height of the casting surface of the peripheral area of the pipeline (2) is 16-18 cm, and the height difference is 5-10 cm, which is the height of the second casting, in the first casting, so as to prevent water leakage in the area under the pipeline (2).
  4. 4. The method for constructing a foundation of a building body containing a complex underground pipeline according to claim 1, wherein in the step S4, the foundation raft (15) is formed by fixing steel bars with ties at intervals of 13-16 cm in the longitudinal direction and the transverse direction, the foundation raft (15) is constructed with a first layer at the elevation (110) of the waterproof construction completion surface, a second layer is constructed at a distance of 0.4-0.8 m from the upper surface of the first layer, and the second layer is constructed after the construction of the first layer is completed.
  5. 5. The method for constructing a foundation of a building body containing a complex underground pipeline according to claim 1, wherein said support-changing unit (9) further comprises a waterproof sleeve (97) disposed between the bottom of said vertical fixing upright (92) and said concrete block (98), said waterproof sleeve (97) comprising: a sleeve body (971), a sleeve body inner bore (972); The first boss (973) is arranged in the middle of the outer wall of the sleeve body (971); The second step (974) is arranged in the middle of the inner wall of the sleeve body (971), a cavity (975) facing the bottom of the sleeve body (971) is defined between the second step (974) and the sleeve body (971), the cavity (975) is used for preventing water at the bottom from overflowing upwards, and the supporting plate (976) is arranged at the bottom of the sleeve body (971).
  6. 6. The method for constructing a foundation of a building body containing a complex underground pipeline according to claim 1, wherein the distance between the vertical fixing upright (92) and the pipeline (2) is 0.4-0.6 m.
  7. 7. The method for constructing a foundation of a building body containing a complex underground pipeline according to claim 1, wherein the height of the concrete test block (98) is 140-160 mm.
  8. 8. The construction method of building main foundation containing complex underground pipeline according to claim 1, wherein the support changing units (9) are arranged in a group at intervals of 1.4-1.6 m.
  9. 9. The construction method for a building main foundation containing a complex underground pipeline according to claim 1, wherein the third fixed cross bar (95) is 1.2-1.4 m away from the waterproof construction completion surface elevation (110).

Description

Protection construction method for complex underground pipeline Technical Field The invention relates to underground pipeline migration, in particular to a complex underground pipeline protection construction method. Background When underground construction is carried out in cities, a plurality of very complicated pipelines such as pipelines, high-voltage cables, main water supply pipes, main sewage pipes and the like can be encountered in the process of excavation, and the pipelines need to be protected before migration, so that inconvenience caused by pipeline damage is avoided. When the transformer substation is built, the main body contour line is provided with an airport in-use communication main pipeline, and the pipeline cannot be changed before completion of the project. The pipeline is a main communication pipeline for an airport, and if the main communication pipeline is protected without making careful technical measures, the normal operation of an airport station area of the airport is affected. And if the pipeline is not protected, construction of the project is delayed, and waste of manpower and financial resources is caused. Compared with the prior art, the method can furthest promote site construction, avoid the problem that the site cannot be constructed because a pipeline is not changed, and simultaneously combine with the design waterproof requirement, the method can ensure the integral uninterrupted performance of the foundation waterproof engineering, and furthest reduce the leakage risk of the construction method. On the other hand, the technology can shorten the construction period, avoid the construction expenditure caused by the construction impossibility of pipelines and the construction period extension, and avoid the waste of manpower and financial resources. Disclosure of Invention In order to solve the technical problems, the invention provides a complex underground pipeline protection construction method, which is realized by the following steps: a complex underground pipeline protection construction method comprises the following steps: S1, determining the specific position and trend of a pipeline (2) before excavating a ditch, excavating the soil to the elevation of the top of the pipeline (2), then, drilling the vertical channel steel (3) into the soil along the two side surfaces of the extending direction of the pipeline (2), and after excavating the periphery of the pipeline (2) to the elevation of the bottom of the pipeline (2), welding the transverse channel steel (4) on the vertical channel steel (3) on the upper surface and the lower surface of the pipeline (2); S2, pouring the lower part and the peripheral area of the pipeline (2) for the first time, wherein the pouring completion surface of the lower part of the pipeline (2) is lower than the completion surface of the peripheral area of the pipeline (2), the completion surface of the lower part of the pipeline (2) is defined as a waterproof construction completion surface mark bottom (100), the completion surface of the peripheral area is a waterproof construction completion surface elevation (110), and a support replacing device (30) is built on the pouring surface after the pouring is completed, wherein the support replacing device (30) is used for stably supporting the pipeline (2); S3, removing the vertical channel steel (3) and the horizontal channel steel (4) after the support replacing device (30) is accepted, and then performing secondary pouring on the area below the pipeline (2), wherein the pouring surface is flush with the elevation (110) of the waterproof construction completion surface; S4, building a foundation raft (15) after pouring of the area below the pipeline (2) is completed, and integrally pouring the bottoms of the foundation raft (15) and the support changing device (30) by using concrete, wherein the pouring height is the elevation (120) of the foundation raft; S5, after the pipeline (2) is removed and changed, cutting off a part of the vertical rod of the support changing device (30) on the elevation (120) of the foundation raft, performing secondary grouting on a steel pipe in the poured concrete, and performing light receiving construction treatment on the ground. The beneficial effects of the invention are as follows: The pipeline is supported by building the vertical channel steel and the horizontal channel steel, casting is carried out on the periphery and the lower area of the pipeline, and casting height of the lower area of the pipeline is lower than that of the peripheral area. After pouring is completed, a support changing device is built, and after the support changing device is qualified in acceptance, secondary pouring is performed on the area below the pipeline, so that water resistance is realized. And constructing two layers of foundation raft boards below the support changing device, and pouring. After the pipeline is changed, the bottom of the support changing device is c