Pipe culvert structure for protecting existing shallow buried pipeline
By setting up a combination of cast-infused piles and reinforced concrete structures between shallow buried pipelines, the problem that existing shallow buried pipelines are difficult to reinforce and affected by heavy-duty vehicles during road construction is solved, and the effects of rapid construction, high equivalent protection and low cost are achieved.
Patent Information
- Application Number
- CN202421573722.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-04
- Publication Date
- 2025-06-06
- Estimated Expiration
- 2034-07-04
AI Technical Summary
The existing shallow buried pipelines are difficult to reinforce the entire road width during road construction, and are affected by the passage of heavy-duty vehicles, which can easily lead to problems such as pipe bursting.
A reinforced concrete structure consisting of cast-infused piles, bearing beams, columns and support plates is adopted. The cast-infused piles are distributed between the pipelines. The bearing beams, columns and support plates are connected to form an integral part. The support plate is located at the top of the pipeline. A concrete cushion layer and extruded plate are provided at the lower end of the bearing beam.
The structure can be constructed quickly, ensure construction quality, provide efficient pipeline protection, reduce project cost, reduce construction uncertainties, improve construction safety and progress efficiency, and has good economic and social benefits.
Smart Images
Figure CN222948856U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a pipe culvert protection structure, in particular to a pipe culvert structure used for protecting existing shallow buried pipelines. Background Art
[0002] With the continuous acceleration of the process of urban modernization, urban projects often encounter the problem of protecting existing shallow buried pipelines. The renovation and expansion project is different from conventional new construction projects. The construction period is tight and the task is heavy. The renovation and expansion area is generally integrated with the original first-phase production facilities. During the construction process, the construction and the original first-phase production are inseparable and affect each other. In addition, the site conditions are generally cramped. The construction scope often involves many production pipelines in the first phase. Some pipelines are generally shallowly buried and the surrounding environment is complex. Therefore, during the construction period, it is particularly important to ensure the normal operation of the original first-phase production without being affected by the construction, and at the same time, to ensure the steady progress of the project.
[0003] Currently available pipeline protection methods include grouting reinforcement, concrete encapsulation outside the steel pipe, casing protection and other measures.
[0004] Grouting reinforcement: Compacting and grouting the soil within 1 m on both sides of the pipeline and 0.5 m above the top of the pipe can effectively improve the strength of the soil around the pipe and spread the vehicle load to the bottom of the reinforcement area. The grouting pressure is 0.2~7.0MPa. However, there are usually existing pipelines near the engineering pipeline, which are close (generally 3-4m) and have been in service for a long time. Grouting may affect the pipeline. At the same time, the effect of grouting reinforcement is not durable, because excessive grouting force will cause certain damage to the structure and cause new cracks in the pipeline.
[0005] Concrete encapsulation: Use reinforced concrete to encapsulate the pipeline, and use the reinforced concrete structure and the pipeline to resist the upper load together, reduce the stress on the pipeline, and the thinnest part of the encapsulation is 250 mm. The main principle is to use the concrete and the pipeline to resist the upper load together and reduce the stress on the pipeline body. However, the distance between existing pipelines is usually relatively close (generally 3-4m), and the construction conditions may not be met. At the same time, the encapsulated concrete generally needs to be poured more than twice during construction to complete the entire process. During the second pouring, the construction personnel often ignore or do not pay attention to quality control, resulting in construction quality problems. In severe cases, rework will be required, which will delay the construction period. This makes this process a common quality problem. In addition, the construction of the encapsulation will affect the flexible joint (changing the stress of the flexible joint affects durability), which will have a certain impact on the protection of the pipeline.
[0006] Casing protection: In general renovation and expansion projects, buried pipelines are usually involved in the construction of various roads. For safety reasons during the use of the pipeline, a protective casing is usually installed to protect the pipeline. However, in areas with abundant groundwater, the use of pipeline casings is easily affected by the water level, resulting in casing displacement and corrosion, affecting the construction quality of the pipeline. At the same time, the method and process of casing protection are relatively cumbersome to construct, and the final protection effect needs to be improved. Summary of the invention
[0007] The technical problem to be solved by the utility model is to provide a pipe culvert structure for protecting existing shallow buried pipelines, which can solve the problems that the shallow buried pipeline road cannot be reinforced in its entire width, and heavy-loaded vehicles often pass over the pipeline, which will lead to subsequent pipe bursts. The structure has the characteristics of fast construction, easy control of construction quality, high effectiveness of pipeline protection, and low engineering cost. Through the structure, the effective protection of important shallow buried pipelines can be strengthened, and the uncertain factors in the construction process can be reduced, thereby improving construction production safety, greatly improving the efficiency of the construction progress on site, and having good economic and social benefits.
[0008] In order to solve the above technical problems, the technical solution adopted by the utility model is:
[0009] A pipe culvert structure for protecting existing shallow buried pipelines comprises cast-in-place piles which are distributed in multiple groups and located between adjacent pipelines. The upper end of each group of cast-in-place piles is provided with a cap beam and columns in sequence from bottom to top. The top ends of the multiple columns are connected into a whole through a support plate which is located on the top of the pipeline.
[0010] The pile length of the cast-in-place pile is 38m, and the steel bars at the top of the cast-in-place pile extend into the cap beam.
[0011] The pedestal beams, columns and supporting plates are all reinforced concrete structures.
[0012] A cushion layer is arranged at the lower end of the pedestal beam, and the cushion layer is a concrete cushion layer.
[0013] An extruded plate is arranged at the lower end of the cushion layer.
[0014] The utility model provides a pipe culvert structure for protecting existing shallow buried pipelines, which has the following technical effects:
[0015] 1) By vertically setting cast-in-place piles in the intervals between the pipelines, the top of the cast-in-place piles are connected to the supporting plate through the pedestal beam, column and supporting plate. The pedestal beam, column and supporting plate are all made of reinforced concrete structure with high overall strength. The supporting plate on the top of the pipeline can transfer the upper vehicle load to the cast-in-place piles and the soil at the pile end to protect the pipeline from the impact of road loads. At the same time, it can effectively reduce the impact of heavy vehicles on the top and sides of the pipeline.
[0016] 2) The above-mentioned device is quick to construct, easy to control the construction quality, highly effective in pipeline protection, and has a low project cost. It can effectively strengthen the protection of shallowly buried and important pipelines, reduce uncertainties in the construction process, thereby improving construction production safety, greatly improving the efficiency of on-site construction progress, and has good economic and social benefits. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments:
[0018] Figure 1 It is a top view of the utility model.
[0019] Figure 2 for Figure 1 Cross-sectional view at AA in the middle.
[0020] Figure 3 for Figure 1 Cross-sectional view at BB.
[0021] Figure 4 It is a schematic diagram of the actual plan layout of the utility model (a represents the left side road edge line, the shaded area in b is the reinforced road surface, L represents the road surface width, and D represents the pipeline protection area).
[0022] Figure 5 for Figure 2 Detailed drawing of point C in the middle.
[0023] In the figure: cast-in-place piles 1, cap beams 2, columns 3, supporting plates 4, extruded boards 5, cushion layers 6, pipes 7, and pavement layers 8. DETAILED DESCRIPTION
[0024] like Figure 1 As shown, a pipe culvert structure for protecting existing shallow buried pipelines includes a cast-in-place pile 1, and the upper end of the cast-in-place pile 1 is provided with a cap beam 2, a column 3 and a support plate 4 from bottom to top. The cap beam 2, the column 3 and the support plate 4 are all reinforced concrete structures, and the heights are 800mm, 900mm and 400mm respectively. Among them, the support plate 4 is the main load-bearing layer, and the column 3 transfers the ground load to the cap beam 2, and then to the foundation by the cap beam 2. The concrete in the cap beam 2, the column 3 and the support plate 4 is C30, and the anti-seepage grade is P8, and the steel bars in the cap beam 2, the column 3 and the support plate 4 are HRB400 threaded steel.
[0025] The cast-in-place piles 1 are φ600 bored cast-in-place piles with an effective pile length of 38m and a number of 22. The characteristic values of the designed vertical bearing capacity of a single pile are shown in Table 1.
[0026] Table 1
[0027]
[0028] The reinforcement of cast-in-place pile 1 is HRB400 threaded steel bar, the concrete strength grade is C30, the cement is 44 ordinary Portland cement, the water-cement ratio is not more than 0.5, the impermeability grade is P8, the chloride ion content in the cementitious material is not more than 0.08%, the alkali content is not more than 3.0kg / m, the minimum amount of cementitious material is 300kg / m³, and the thickness of the concrete protective layer is 55mm.
[0029] Preferably, an extruded plate 5 and a cushion layer 6 are further provided at the lower part of the support plate 4 .
[0030] Among them, the extruded plate 5 is 100mm thick, and the extruded plate 5 has a unique advantage in road insulation. Due to its superior thermal insulation performance, the extruded plate is widely used in road insulation projects, effectively improving the durability and stability of the road surface. This not only helps to extend the service life of the road surface, but also reduces the cost of road maintenance. At the same time, it can effectively slow down the temperature change of the soil, prevent the settlement and deformation of the roadbed, and ensure the safe and stable operation of the high-speed railway. It has positive significance for urban transportation construction.
[0031] The cushion layer 6 is a 100mm thick concrete cushion layer. The concrete cushion layer is the middle layer between the reinforced concrete foundation and the foundation soil. Its function is to make its surface flat for tying steel bars on it. It also plays a role in protecting the reinforced concrete foundation (support plate 4). It is plain concrete and does not require steel bars. It uses C20 grade concrete and has a thickness of 100mm.
Claims
1. A pipe culvert structure for protecting existing shallow buried pipelines, characterized in that: The invention comprises cast-in-place piles (1), which are distributed in a plurality of groups at intervals and are located between adjacent pipes (7), and the upper end of each group of cast-in-place piles (1) is provided with a cap beam (2) and a column (3) in sequence from bottom to top, and the top ends of the plurality of columns (3) are connected into a whole through a support plate (4), and the support plate (4) is located on the top of the pipe (7).
2. A pipe culvert structure for protecting existing shallow buried pipelines according to claim 1, characterized in that: The pile length of the cast-in-place pile (1) is 38 m, and the steel bars at the top of the cast-in-place pile (1) extend into the cap beam (2).
3. The pipe culvert structure for protecting existing shallow buried pipelines according to claim 1 is characterized in that: The cap beam (2), the column (3) and the support plate (4) are all reinforced concrete structures.
4. The pipe culvert structure for protecting existing shallow buried pipelines according to claim 1 is characterized in that: A cushion layer (6) is provided at the lower end of the cap beam (2), and the cushion layer (6) is a concrete cushion layer.
5. A pipe culvert structure for protecting existing shallow buried pipelines according to claim 4, characterized in that: An extruded plate (5) is provided at the lower end of the cushion layer (6).