A method and structure for reinforcing a directly buried pipe under the ground
By using U-shaped structure hanging ribs and positioning ribs to fix the pipeline in construction, the deviation and settlement problems of the pipeline during backfill are solved, the position stability and construction quality of the pipeline are ensured, the construction process is simplified and the construction process is improved. efficiency.
Patent Information
- Application Number
- CN202011179611.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2020-10-29
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2040-10-29
AI Technical Summary
During construction, during pipeline laying of underground basement buildings, pipelines are prone to shift or settlement due to instability and insufficient compaction of backfill soil, resulting in the slope of the drainage pipeline that does not meet the requirements, which may cause damage and leakage .
A method of reinforcement for straight buried pipes under the ground is adopted. By making U-shaped structure hanging ribs and positioning ribs, the pipes are fixed in the backfill soil, and layered backfill and sand filling are carried out during the backfill process to ensure the stability of the pipes. and position accuracy, and finally fix the hanging ribs in the concrete layer of the floor to prevent settlement.
It effectively solves the problems of offset and settlement of pipelines during the backfill process, ensures the accuracy of the pipeline position and construction quality, simplifies the construction process, saves costs, and reduces the white ash marking process, and improves construction efficiency.
Smart Images
Figure CN112324990B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of building construction, and in particular to a method and structure for reinforcing a directly buried pipe under the ground. Background Art
[0002] During the construction of construction projects, some pipelines in buildings without basements (such as water supply and drainage, electrical pipelines, etc.) need to be laid under the first floor. The conventional practice is to backfill the soil to the bottom elevation of the pipeline for pipeline connection, and then directly pour a layer of ground concrete floor after backfilling the upper part of the pipeline and compacting it. There is no connection between the pipeline and the floor. This practice has two disadvantages. First, the pipeline is not fixedly connected to the soil during the backfilling process, which may cause the pipeline to shift left and right during the backfilling process; second, during the pipeline laying process, the backfill soil often sinks at the later pipeline due to quality problems of the backfill soil or insufficient compaction of the backfill soil. The laid pipeline will also sink as a result, resulting in the slope of some drainage pipelines not meeting the requirements, and severe damage to the pipeline will cause leakage. Summary of the invention
[0003] The purpose of the present invention is to provide a method and structure for reinforcing directly buried pipes below the ground, which is used for laying pipelines below the ground layer, effectively solving the above two technical defects and making the position of underground concealed pipelines accurate and reliable.
[0004] To achieve the above object, the present invention adopts the following technical solutions:
[0005] A method for reinforcing a directly buried pipe below the ground, comprising the following steps:
[0006] 1) Fill the backfill soil to the lower elevation of the pipeline to be laid;
[0007] 2) Making the hanging rod: The middle part of the hanging rod is a U-shaped structure, the upper end of the U-shaped structure is first bent to both sides and then bent downward, and fixing rings are welded on both sides of the U-shaped structure of the hanging rod;
[0008] 3) Insert the positioning bar into the fixing ring of the hanging bar, and fix the hanging bar to the backfill soil through the positioning bar at a fixed interval on the pipeline laying route. The lower end of the positioning bar should penetrate into the backfill soil under the pipeline by no less than 400mm;
[0009] 4) Lay the pipeline, place the pipeline inside the suspension rod, and connect the pipeline;
[0010] 5) Backfill the two sides and the top of the pipeline in layers;
[0011] 6) Pull out the positioning ribs and fill the holes of the positioning ribs with sand;
[0012] 7) The bent part of the upper end of the hanger bar is exposed from the backfill soil layer, and the floor concrete is poured. The bent part of the upper end of the hanger bar is fixed in the floor concrete pouring layer.
[0013] In the above step 1), the backfill is carried out in layers and compacted, the compaction coefficient is not less than 0.94, and the thickness of each backfill layer is not more than 300 mm.
[0014] In the above step 5), the backfill thickness of each layer shall not exceed 300 mm, and each layer shall be compacted with a compaction coefficient of not less than 0.94.
[0015] In the above step 6), medium sand is used to fill the holes of the positioning bars, and the particle size of the medium sand is 2.3-3 mm.
[0016] A structure adopted in a method for reinforcing a directly buried pipe below the ground includes a hanger bar, a positioning bar, a backfill soil layer, and a fixing ring. The middle part of the hanger bar is a U-shaped structure. The fixing ring is fixed on both sides of the hanger bar. The positioning bar is inserted into the fixing ring. The lower part of the positioning bar and the lower part of the hanger bar are in the backfill soil layer. The pipeline is installed in the U-shaped structure of the hanger bar. The bottom of the positioning bar is inserted into the backfill soil under the pipeline by not less than 400 mm. The upper end of the hanger bar is exposed in the backfill soil layer and is not higher than the floor concrete layer.
[0017] The middle part of the suspension rod is a U-shaped structure, and the upper end of the U-shaped structure is first bent to both sides and then bent downward.
[0018] The part of the suspension rod buried in the backfill soil layer is painted with an anti-rust paint layer, and the bottom and both sides of the U-shaped structure of the suspension rod are wrapped with glass wool.
[0019] The thickness of the glass wool is 40-50 mm.
[0020] Compared with the prior art, the present invention has the following beneficial effects:
[0021] The invention has a simple structure and is easy to use, and fully utilizes the cut steel bar heads in the main structure construction process, thereby saving costs and ensuring the construction quality of the pipeline. Meanwhile, the white lime marking process can be reduced and the construction efficiency can be improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 It is a main schematic diagram of pipeline laying of the present invention.
[0023] Figure 2 It is a schematic cross-sectional view of pipeline laying of the present invention.
[0024] In the figure: 1-glass wool, 2-hanging rod, 3-positioning rod, 4-fixing ring, 5-pipeline, 6-floor concrete layer, 7-backfill soil layer, 8-pipeline joint. DETAILED DESCRIPTION
[0025] The present invention is described in detail below, but the implementation scope of the present invention is not limited to the following embodiments.
[0026] like Figure 1-Figure 2 As shown, a method for reinforcing a directly buried pipe below the ground includes the following steps:
[0027] 1) Fill the backfill soil to the lower elevation of the pipeline 5 to be laid;
[0028] 2) Making the hanging rib 2: The middle part of the hanging rib 2 is a U-shaped structure, the upper end of the U-shaped structure is first bent to both sides and then bent downward, and a fixing ring 4 is welded on both sides of the U-shaped structure of the hanging rib 2;
[0029] 3) Insert the positioning bar 3 into the fixing ring 4 of the hanging bar 2, measure and lay out, and fix the hanging bar 2 on the backfill soil through the positioning bar 3 at a fixed interval on the pipeline laying route. The lower end of the positioning bar 3 should penetrate the backfill soil under the pipeline 5 by no less than 400mm to ensure that the pipeline 5, the positioning bar 3, and the hanging bar 2 do not shift during the backfill construction process;
[0030] A set of positioning ribs 3 and hanger bars 2 are arranged on both sides of the front and rear of the pipe interface 8, with a distance from the interface not greater than 100 mm; a set of positioning ribs 3 and hanger bars 2 are arranged at the corner of the vertical elbow, with a distance from the elbow not greater than 100 mm; a set of positioning ribs and hanger bars are arranged in both directions of the horizontal elbow, with a distance from the elbow not greater than 100 mm.
[0031] 4) Lay the pipeline 5, place the pipeline 5 inside the hanger 2, and connect the pipeline 5 (for pipelines with slope requirements, adjust the hanger and pipeline elevations according to the slope requirements to meet the slope requirements);
[0032] 5) Backfill the two sides and the upper part of the pipeline 5 in layers;
[0033] 6) Pull out the positioning rib 3 and fill the holes of the positioning rib 3 with sand;
[0034] 7) The bent portion of the upper end of the hanger bar 2 is exposed to the backfill soil layer 7. The position of the upper end portion of the hanger bar 2 and the shape of the bent portion are adjusted. The horizontal portion of the bent portion of the hanger bar 2 remains straight, and the downward bent hook portion remains vertical. The floor concrete layer 6 is poured, vibrated, and maintained. Avoid colliding with the hanger bar 2 during the vibration process. The bent portion of the upper end of the hanger bar 2 is fixed in the floor concrete layer 6.
[0035] In the above step 1), the backfill is layered and compacted, with a compaction coefficient of not less than 0.94 and a backfill thickness of not more than 300 mm. The backfill soil is one of lime soil, graded sand and gravel, and clay soil with good compaction, and is backfilled layered to the bottom of the pipeline to be laid.
[0036] In the above step 5), the thickness of each backfill layer is not more than 300 mm, and each layer is compacted, with a compaction coefficient of not less than 0.94. The backfill soil is selected from the group consisting of lime soil, graded sand and gravel, and clay soil with good compaction properties.
[0037] In the above step 6), medium sand is used to fill the holes of the positioning bars, and the particle size of the medium sand is 2.3-3 mm.
[0038] A structure adopted in a method for reinforcing a directly buried pipe below the ground comprises a hanger bar 2, a positioning bar 3, a backfill soil layer 7, and a fixing ring 4. The middle part of the hanger bar 2 is a U-shaped structure. The fixing ring 4 is fixed on both sides of the hanger bar 2. The positioning bar 3 is inserted into the fixing ring 4. The lower part of the positioning bar 3 and the lower part of the hanger bar 2 are in the backfill soil layer 7. The pipeline 5 is installed in the U-shaped structure of the hanger bar 2. The bottom of the positioning bar 3 is inserted into the backfill soil under the pipeline 5 by not less than 400 mm. The upper end of the hanger bar 2 is exposed from the backfill soil layer 7 and is not higher than the floor concrete layer 6.
[0039] The middle part of the suspension rod 2 is a U-shaped structure, and the upper end of the U-shaped structure is first bent to both sides and then bent downward.
[0040] The hanger bar 2 is welded or integrally bent with a steel bar head of Φ10 mm or more. The part of the hanger bar 2 buried in the backfill soil layer 5 is painted with an anti-rust paint layer. The bottom and both sides of the U-shaped structure of the hanger bar 2 are wrapped with glass wool 1.
[0041] The thickness d of the glass wool 1 is 40-50 mm, which prevents the pipe 5 from having hard contact with the suspension rod 2 .
[0042] The height of the hanger 2 is determined according to the requirements of the pipeline slope, and the width of the U-shaped structure is D+2d+20mm, where D is the diameter of the pipeline 5.
[0043] The fixing rings 4 are respectively arranged at 1 / 3 and 2 / 3 of the height of the hanger bars 2. The positioning bars 3 fix the hanger bars 2 on the backfill soil through the fixing rings 4. The pipes 5 to be laid are placed in the hanger bars 2. The pipes 5 are suspended on a floor concrete layer 6 through the hanger bars 2 to ensure that the pipes 5 do not settle.
[0044] The end of the hanger bar 2 anchored in the floor concrete layer 6 is bent into two 90-degree hooks, and the length of the straight section is not less than 1 / 2 of the thickness of the floor concrete layer 6.
[0045] The positioning bar 3 is a steel bar with a diameter of more than Φ10mm, and the upper end is welded into a T shape to facilitate the extraction of the positioning bar 3 after backfilling and before pouring concrete. The lower end of the positioning bar 3 is required to penetrate the backfill soil under the pipe 5 by no less than 400mm to ensure that the pipe 5, the positioning bar 3, and the suspension bar 2 do not shift during the construction of the backfill soil layer 7.
Claims
1. A method for reinforcing a directly buried pipe below the ground, characterized in that: The method comprises the following steps: 1) Fill the backfill soil to the lower elevation of the pipeline to be laid; 2) Making the suspension rod: The middle part of the suspension rod is a U-shaped structure, the upper end of the U-shaped structure is first bent to both sides and then bent downward, and fixing rings are welded on both sides of the U-shaped structure of the suspension rod; 3) Insert the positioning bar into the fixing ring of the hanging bar, and fix the hanging bar to the backfill soil through the positioning bar at a fixed interval on the pipeline laying route. The lower end of the positioning bar should penetrate into the backfill soil under the pipeline by no less than 400mm; 4) Lay the pipeline, place the pipeline inside the suspension rod, and connect the pipeline; 5) Backfill the two sides and the top of the pipeline in layers; 6) Pull out the positioning ribs and fill the holes of the positioning ribs with sand; 7) The bent part of the upper end of the hanger bar is exposed to the backfill soil layer, and the floor concrete is poured. The bent part of the upper end of the hanger bar is fixed in the floor concrete pouring layer; In step 5 above, backfill in layers and compact them, with a compaction coefficient of not less than 0.94 and a backfill thickness of not more than 300 mm per layer; In step 5 above, the backfill thickness of each layer shall not exceed 300 mm, and each layer shall be compacted with a compaction coefficient of not less than 0.94; In step 6) above, medium sand is used to fill the holes of the positioning bars, and the particle size of the medium sand is 2.3-3mm; The width of the hanger bar matches the diameter of the pipe; a set of positioning bars and hangers are set on both sides of the front and rear of the pipe interface, and the distance from the interface is no more than 100mm; a set of positioning bars and hangers are set at the corner of the vertical elbow, and the distance from the elbow is no more than 100mm; a set of positioning bars and hangers are set in both directions of the horizontal elbow, and the distance from the elbow is no more than 100mm; The part of the suspension bar buried in the backfill soil layer is painted with an anti-rust paint layer, and the bottom and both sides of the U-shaped structure of the suspension bar are wrapped with glass wool; The thickness of the glass wool is 40-50 mm.
2. A structure used in the method for reinforcing a directly buried pipe under the ground as claimed in claim 1, characterized in that: It includes a hanger bar, a positioning bar, a backfill soil layer, and a fixing ring. The middle part of the hanger bar is a U-shaped structure. The fixing ring is fixed on both sides of the hanger bar. The positioning bar is inserted in the fixing ring. The lower part of the positioning bar and the lower part of the hanger bar are in the backfill soil layer. The pipeline is installed in the U-shaped structure of the hanger bar. The bottom of the positioning bar is inserted into the backfill soil under the pipeline by not less than 400mm. The upper end of the hanger bar is exposed from the backfill soil layer and is not higher than the floor concrete layer.