CN111503373A - Underground pipeline protection structure and construction method thereof - Google Patents
Underground pipeline protection structure and construction method thereof Download PDFInfo
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- CN111503373A CN111503373A CN202010306172.7A CN202010306172A CN111503373A CN 111503373 A CN111503373 A CN 111503373A CN 202010306172 A CN202010306172 A CN 202010306172A CN 111503373 A CN111503373 A CN 111503373A
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- Prior art keywords
- pipeline
- protection
- bracket
- cable
- cables
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L3/00—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets
- F16L3/02—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets partly surrounding the pipes, cables or protective tubing
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/10—Tunnels or galleries specially adapted to house conduits, e.g. oil pipe-lines, sewer pipes ; Making conduits in situ, e.g. of concrete ; Casings, i.e. manhole shafts, access or inspection chambers or coverings of boreholes or narrow wells
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
- F16L1/024—Laying or reclaiming pipes on land, e.g. above the ground
- F16L1/06—Accessories therefor, e.g. anchors
- F16L1/11—Accessories therefor, e.g. anchors for the detection or protection of pipes in the ground
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
Abstract
The invention discloses an underground pipeline protection structure which comprises a protection pipeline, vertical frames on two sides and a plurality of inhaul cables, wherein the vertical frames are fixed in piles in an SMW construction method, column foot reinforcing rib plates are arranged on the vertical frames, the vertical frames are provided with the inhaul cables and anchoring cables, and the other ends of the anchoring cables are fixed in anchor ingots on the ground; the other end of the inhaul cable is fixed in a buckle ring on the pipeline protection bracket; the protection pipeline is installed in the pipeline protection bracket, and a rubber pad is arranged between the pipeline protection bracket and the protection pipeline. The invention also discloses a pipeline protection construction method, wherein the vertical frames are arranged on two sides of the foundation pit, the pipeline protection bracket is fixed through the stay cable, and the anchor cable balances the tensile stress of the stay cable through the anchor ingot, so that the method is safe, reliable and simple and convenient to construct.
Description
Technical Field
The invention relates to the field of underground comprehensive pipe gallery construction, in particular to an underground pipeline protection structure and a construction method thereof.
Background
The construction of underground comprehensive pipe galleries in China is developed rapidly in recent years, the underground comprehensive pipe galleries can meet various municipal pipelines in the process of excavation of foundation pits, the moving and the changing of the municipal pipelines can consume a large amount of time and money, construction units can meet the underground pipelines and adopt a protection method as far as possible, and a suspension protection method can be adopted for the underground pipelines with small span; aiming at the underground pipeline with large span, the large-span steel truss is adopted as the suspension frame to suspend the underground pipeline in the prior art, and the self weight of the steel truss is large, so that the structure of the steel truss is downwarped when the steel truss is used under the large-span condition, and certain potential safety hazard is brought to construction.
Disclosure of Invention
In order to solve the problems, the invention provides an underground pipeline protection structure and a construction method thereof, which have the advantages of reasonable structural design, safety, reliability, economy, reasonability and simple and convenient construction. The difficult problem of large-span underground pipeline protection can be effectively solved.
The specific technical scheme of the invention is as follows:
an underground pipeline protection structure comprises a protection pipeline, vertical frames on two sides and a plurality of inhaul cables, wherein the vertical frames are fixed in piles of an SMW construction method, column foot reinforcing rib plates are arranged on the vertical frames, the vertical frames are provided with the inhaul cables and anchoring cables, and the other ends of the anchoring cables are fixed in anchor ingots on the ground; the other end of the inhaul cable is fixed in a buckle ring on the pipeline protection bracket; the protection pipeline is installed in the pipeline protection bracket, and a rubber pad is arranged between the pipeline protection bracket and the protection pipeline.
Further, the vertical frame is made of H-shaped steel.
Further, the pipeline protection bracket is connected through a plurality of longerons for the U shaped steel bracket, and U shaped steel bracket both sides are equipped with special lug.
Furthermore, the working inhaul cables of the vertical frames on the two sides are the same in number and stress.
Further, the depth of the SMW construction method pile is twice of the height of the vertical frame.
Furthermore, the range below the ground of the SMW construction method pile is an enlarged opening within 50 cm.
Further, the pipeline protection construction method comprises the following steps:
the method comprises the following steps: performing SMW construction, reserving an enlarged opening at the upper part of 50cm, inserting a vertical frame, and welding a column base reinforcing rib plate on an H-shaped steel column base to resist bending moment;
step two: excavating an anchor, pouring a foundation, maintaining, excavating to a protective pipeline base, cleaning, and installing a pipeline protective bracket and a rubber pad;
step three: installing an anchoring cable, and symmetrically penetrating a guy cable to fix the pipeline protection bracket;
step four: adjusting the tensile stress of the anchoring cable and the inhaul cable, and observing the working and displacement states of the vertical frame;
step five: the vertical frame works normally, and when the displacement is within a controllable range, the foundation pit is excavated downwards in layers, and a pipe gallery is constructed; otherwise, the tensile stress of the anchoring cable and the inhaul cable is readjusted;
step six: when the pipe gallery is constructed and layered backfilled to the bottom elevation of the protection pipeline, the guy cables on the pipeline protection bracket are symmetrically dismantled, and meanwhile, the anchoring cables are symmetrically tensioned until the whole guy cables are dismantled;
step seven: and (5) removing and recycling the stand material.
Compared with the prior art, the invention has the advantages that: according to the underground pipeline protection structure and the construction method thereof, the vertical frames are arranged on two sides of the foundation pit, the pipeline protection bracket is fixed through the stay cable, the anchor cable balances the tensile stress of the stay cable through the anchor ingot, and the underground pipeline protection structure is suitable for large-span underground pipeline protection; the structure has reasonable design, safety, reliability and simple and convenient construction.
Drawings
FIG. 1 is a schematic view of an underground utility protection structure;
FIG. 2 is a schematic view of a pipeline protection bracket;
in the figure: 1. the method comprises the following steps of pipe gallery, pile in SMW construction method, 3 vertical frame, 4 protective pipeline, 5 pipeline protective bracket, 6 anchor ingot, 7 anchor cable, 8 inhaul cable and 9 rubber pad.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the present specification, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows: as shown in fig. 1-2, an underground pipeline protection structure is provided, which mainly comprises a protection pipeline 4, two side vertical frames 3 and a plurality of guys 8, wherein the vertical frames 3 are fixed in the pile 2 of the SMW construction method, the vertical frames 3 are provided with column foot reinforcing plates, the vertical frames 3 are provided with the plurality of guys 8 and anchoring ropes 7, and the other ends of the anchoring ropes 7 are fixed in anchor blocks 6 on the ground; the other end of the inhaul cable 8 is fixed in a buckle on the pipeline protection bracket 5; the protection pipeline 4 is arranged in the pipeline protection bracket 5, and a rubber pad 9 is arranged between the pipeline protection bracket 5 and the protection pipeline 4.
In this embodiment, the vertical frame 3 is an H-shaped steel HW400 × 400, and the vertical frame 3 is 3m higher than the ground.
In this embodiment, the pipeline protection bracket 5 is a U-shaped steel bracket connected by a plurality of longitudinal beams, and two sides of the U-shaped steel bracket are provided with special lifting lugs.
In the embodiment, the guys 8 of the two side stands 3 have the same quantity and the same stress.
In this embodiment, the depth of the SMW method pile 2 is twice the height of the vertical frame 3.
In this embodiment, the SMW method pile 2 is an enlarged opening within 50cm of the ground.
In this embodiment, a pipeline protection construction method includes the following steps:
the method comprises the following steps: determining the construction position of the pile in the SMW construction method according to the positions of a foundation pit slope-setting excavation line and a protection pipeline 4, constructing the pile 2 in the SMW construction method, reserving an enlarged opening in the range of 50cm close to the upper opening, inserting H-shaped steel, using a theodolite for auxiliary positioning to ensure that the verticality of the H-shaped steel is not deviated, and respectively welding column base reinforcing rib plates in four directions of an H-shaped steel column base to resist bending moment, wherein the length ratio of an anchoring end of the H-shaped steel to a cantilever end is 2: l.
Step two: and determining the construction position of the anchor 6 foundation according to the position of the pile 2 in the SMW construction method, ensuring that the positions of the anchor 6 foundation and the pile 2 in the SMW construction method are on the same straight line, ensuring that the included angle between the anchoring cable 7 and the ground is preferably 45-60 degrees, excavating the anchor 6 foundation, binding reinforcing steel bars and pouring concrete. And (3) digging the foundation pit to the base of the protection pipeline 4 in a slope-setting manner, cleaning the foundation pit, placing the rubber pad 9 at the lower part of the protection pipeline 4, and installing the pipeline protection bracket 5.
Step three: the pipeline protection bracket 5 is provided with a lifting lug, one end of an anchoring cable 7 fixes the lifting lug, the other end of the anchoring cable is fixed at the top end of the vertical frame 3, a pulling cable 8 penetrates through the anchoring cable, one end of the pulling cable 8 is anchored in the anchor 6, and the other end of the pulling cable is fixed at the top end of the vertical frame 3.
Step four: adjusting the tensile stress of the anchor cables 7 and the stay cables 8, observing the displacement deviation condition of the vertical frame 3 by using a theodolite, and increasing the tensile stress of the stay cables 8 if the top of the vertical frame 3 has a displacement tendency towards one side of the foundation pit; if the top of the vertical frame 3 has a displacement tendency towards the side departing from the foundation pit, the tensile stress of the stay cable 8 is reduced.
Step five: after the theodolite is used for checking the stable and controllable displacement of the vertical frame 3, a foundation pit is excavated downwards in layers, and a pipe gallery 1 is constructed; in the excavation process and the construction pipe gallery process, collision of construction machinery to the protection pipeline 4 is prevented;
step six: after the construction of the pipe gallery 1 is finished, backfilling the pipe gallery layer by layer to the bottom elevation of the protection pipeline 4, symmetrically removing the inhaul cables 8 on the pipeline protection bracket 5, and simultaneously symmetrically releasing and tensioning the anchoring cables 7 until all the inhaul cables are removed;
step seven: and removing and recycling the H-shaped steel, and backfilling the protection pipeline 4 to the designed pavement elevation.
During the steps, the construction of the SMW construction method pile 2, the vertical frame 3, the anchor ingot 6, the anchor cable 7 and the inhaul cable 8 on two sides of the foundation pit is symmetrically and simultaneously performed.
Example two: taking the following engineering construction as an example, a sewage pipe with an underground pipeline of DN300, the buried depth of covering soil is 3m, a foundation pit adopts two-stage slope-releasing, the slope-releasing proportion is 1:0.75, and the excavation width of the slope-releasing top slope of the foundation pit is 16 m; the construction period of the sewage pipeline moving and changing is long, and the sewage pipeline moving and changing is not considered in the project; the excavation width of the foundation pit slope top slope placement reaches 16m, the truss can be downwarped due to the self weight when being erected, and the sewage pipeline is supported and suspended by the truss, so that the method is neither economical nor safe; the underground pipeline protection structure and the construction method thereof can well solve the problem of suspension protection of the underground pipeline under the condition of large span. In the concrete application, the position, the diameter and the material of a sewage pipeline are determined according to geophysical prospecting and underground prospecting, the SMW construction method pile construction with the diameter of 850mm and the depth of 8m is respectively carried out 3m away from the two sides of a foundation pit, an enlarged opening is formed in the upper part of the SMW construction method pile, HW400 x 400H-shaped steel with the length of 12m is inserted, and the verticality of the H-shaped steel is checked and adjusted by a theodolite; reinforcing rib plates are welded around the H-shaped steel column foot and used for resisting bending moment; constructing an anchor ingot at a position 4m away from the SMW construction method pile; excavating earthwork to the lower part of a sewage pipeline, temporarily protecting the sewage pipeline, mounting a rubber pad and a protection bracket on the lower part of the sewage pipeline, arranging lifting lugs on two sides of the protection bracket every 2m, connecting one end of an anchoring cable with the lifting lugs, and fixing the other end of the anchoring cable on the top end of H-shaped steel; one end of the stay cable is anchored into an anchor ingot, and the other end of the stay cable is fixed at the top end of the H-shaped steel; applying tensile stress to the anchoring cable and the inhaul cable, monitoring the displacement of the top of the H-shaped steel through a theodolite, and determining the adjustment of the tensile stress; after the displacement of the top of the H-shaped steel is stable and controllable, continuing to excavate to the base elevation in a layered mode, constructing an underground comprehensive pipe gallery, after the pipe gallery is backfilled to the bottom elevation of the sewage pipeline, symmetrically removing the inhaul cables 8 on the pipeline protection bracket 5, and simultaneously symmetrically releasing the anchoring cables 7 until all the inhaul cables are removed; and finally recovering the H-shaped steel.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (7)
1. An underground pipeline protection structure comprises a protection pipeline (4), two side vertical frames (3) and a plurality of inhaul cables (8), and is characterized in that the vertical frames (3) are fixed in piles (2) of an SMW construction method, column foot reinforcing rib plates are arranged on the vertical frames (3), the top of each vertical frame (3) is provided with a plurality of inhaul cables (8) and anchoring cables (7), and the other ends of the anchoring cables (7) are fixed in anchor spindles (6) on the ground; the other end of the inhaul cable (8) is fixed in a buckle ring on the pipeline protection bracket (5); the protection pipeline (4) is installed in the pipeline protection bracket (5), and a rubber pad (9) is arranged between the pipeline protection bracket (5) and the protection pipeline (4).
2. An underground pipeline protection structure according to claim 1, wherein the vertical frame (3) is made of H-section steel.
3. The underground pipeline protecting structure according to claim 1, wherein the pipeline protecting bracket (5) is a U-shaped steel bracket connected by a plurality of longitudinal beams, and special lifting lugs are arranged on two sides of the U-shaped steel bracket.
4. An underground pipeline protecting structure according to claim 1, wherein the stand (3) on both sides has the same number of cables (8) and is stressed under the same force.
5. An underground pipeline protecting structure according to claim 1, wherein the depth of the SMW process pile (2) is twice the height of the vertical frame (3).
6. The underground pipeline protecting structure according to claim 1, wherein the SMW process pile (2) is enlarged within a range of 50cm underground.
7. A pipeline protection construction method as claimed in claim 1, comprising the steps of:
the method comprises the following steps: determining the construction position of the pile in the SMW construction method according to the positions of a foundation pit slope-laying excavation line and a protection pipeline (4), constructing the pile (2) in the SMW construction method, reserving an enlarged opening 50cm from the upper part, inserting a vertical frame (3), and welding a column base reinforcing rib plate on the H-shaped steel column base to resist bending moment;
step two: excavating an anchor (6), pouring a foundation, maintaining, excavating to the base of the protection pipeline (4) and cleaning, placing a rubber pad (9) at the lower part of the protection pipeline (4), and installing a pipeline protection bracket (5);
step three: installing an anchoring cable (7), and simultaneously symmetrically penetrating a guy cable (8) to fix the pipeline protection bracket (5);
step four: adjusting the tensile stress of the anchor cable (7) and the inhaul cable (8), and observing the working and displacement states of the vertical frame (3);
step five: the vertical frame (3) works normally, and when the displacement is within a controllable range, the foundation pit is excavated downwards in layers to construct the pipe gallery (1); otherwise, the tensile stress of the anchoring cable (7) and the inhaul cable (8) is readjusted;
step six: when the pipe gallery (1) is constructed and layered and backfilled to the bottom elevation of the protection pipeline (4), the guys (8) on the pipeline protection bracket (5) are symmetrically dismantled, and meanwhile, the anchoring ropes (7) are symmetrically tensioned until the whole process of dismantling is finished;
step seven: and (5) removing and recovering the materials of the vertical frame (3), and backfilling the protection pipeline (4) to the designed pavement elevation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010306172.7A CN111503373A (en) | 2020-04-17 | 2020-04-17 | Underground pipeline protection structure and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010306172.7A CN111503373A (en) | 2020-04-17 | 2020-04-17 | Underground pipeline protection structure and construction method thereof |
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| CN111503373A true CN111503373A (en) | 2020-08-07 |
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| CN202010306172.7A Pending CN111503373A (en) | 2020-04-17 | 2020-04-17 | Underground pipeline protection structure and construction method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114576431A (en) * | 2021-12-27 | 2022-06-03 | 华北冶建工程建设有限公司 | Flexible natural gas pipeline reinforcing method |
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