Prefabricated spanning foundation and construction method thereof

Abstract

The invention belongs to the technical field of reconstruction engineering construction, and provides a prefabricated spanning foundation and a construction method thereof.The prefabricated spanning foundation comprises first foundation assembly parts capable of being embedded in the two sides of a pipeline, second foundation assembly parts capable of being connected with the first foundation assembly parts in an assembled mode, and third foundation assembly parts capable of being connected with the second foundation assembly parts in an assembled mode; the second basic assembly part comprises a second assembly part body, and the third basic assembly part comprises a third assembly part body; the first arc-shaped surface and the second arc-shaped surface which are used for containing the pipeline are arranged on the first assembly part body and the second assembly part body correspondingly, an original pipeline can be spanned through the first arc-shaped surface and the second arc-shaped surface, temporary dismantling of the original pipeline is not needed, safe operation of the pipeline can be guaranteed, meanwhile, the original pipeline does not need to be avoided, and the cost is reduced. And the situation that extra plant space is occupied is avoided, only local excavation needs to be conducted on the two sides of an original pipeline to be used for pre-burying the first foundation assembly part, supporting measures are not needed, and safety risks are avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of renovation project construction, and particularly relates to a prefabricated spanning foundation and a construction method thereof. Background Art

[0002] At present, the layout of various underground pipelines in factory areas is complex. When facing renovation projects, various situations will be encountered during on-site excavation. When new foundations need to be added in the factory area during renovation projects, there will be conflicts between the original pipelines and the new foundations.

[0003] When traditional foundations are constructed, the conflict problem with the original pipelines is mainly manifested as follows: adopting the scheme of temporarily demolishing the original pipelines or corridors. Temporarily demolishing the original pipelines or corridors often causes the pipelines to stop operating. Taking large-diameter steam pipelines as an example, the shutdown cost is high; in order to avoid the original pipelines, the new foundations occupy additional factory area space or new addition conditions are not available due to limited factory area space; and for local excavation of the original pipelines, temporary support or bracing must be carried out, the construction is complex, and there are certain safety risks; moreover, in addition to high costs, high risks and complex construction, there is also the problem of long construction period. Summary of the Invention

[0004] In order to solve the above problems, the invention provides a prefabricated spanning foundation and a construction method thereof. First foundation fittings are respectively embedded on both sides of the original pipeline, then second foundation fittings are assembled on the first foundation fittings, and third foundation fittings are assembled on the second foundation fittings; the original pipeline is located within a first arc surface and a second arc surface; through the first arc surface and the second arc surface, the original pipeline can be spanned, there is no need to temporarily demolish the original pipeline, the safe operation of the pipeline can be ensured, at the same time, there is no need to avoid the original pipeline, occupying additional factory area space is avoided, only local excavation on both sides of the original pipeline is required for embedding the first foundation fittings, and no bracing measures are required, avoiding safety risks.

[0005] In order to achieve the above object, in the first aspect, the invention provides a prefabricated spanning foundation, adopting the following technical solution:

[0006] A prefabricated spanning foundation includes first foundation fittings that can be embedded on both sides of a pipeline, second foundation fittings that can be assembled and connected with the first foundation fittings, and third foundation fittings that can be assembled and connected with the second foundation fittings;

[0007] The second foundation fittings include a second fitting body, and the third foundation fittings include a third fitting body; on the second fitting body and the third fitting body, a first arc surface and a second arc surface for accommodating the pipeline are respectively provided.

[0008] Further, the first basic fitting includes a first fitting body and a first connecting rib provided at one end of the first fitting body.

[0009] Further, a first assembly groove is provided at one end of the second fitting body; a first assembly hole adapted to the first connecting rib is formed in the first assembly groove; a second assembly groove and a second connecting rib are provided at the other end of the second fitting body.

[0010] Further, an inclined surface is provided on one side of the second fitting body, and the first arc surface is provided on the other side.

[0011] Further, the second assembly groove is a long groove.

[0012] Further, an assembly block is provided at one end of the third fitting body, and the assembly block is a rectangular block; the assembly block is assembled in the second assembly groove.

[0013] Further, a fastening step is provided at the other end of the third fitting body, and a second assembly hole adapted to the second connecting rib is formed in the fastening step.

[0014] Further, a boss is provided at one end of the third fitting body away from the second arc surface, and a shear-resistant groove is formed in the boss; third connecting ribs are provided around the shear-resistant groove.

[0015] Further, the second assembly groove is a cross groove; the assembly block is a cross block.

[0016] In order to achieve the above object, in the second aspect, the present invention also provides a prefabricated spanning foundation construction method, adopting the following technical solution:

[0017] A prefabricated spanning foundation construction method uses the prefabricated spanning foundation as described in the first aspect, including:

[0018] The first basic fittings are respectively embedded on both sides of the original pipeline, and then the second basic fittings are assembled on the first basic fittings, and the third basic fittings are assembled on the second basic fittings; the original pipeline is located within the first arc surface and the second arc surface.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] The assembled spanning foundation in the present invention includes a first foundation fitting that can be embedded on both sides of a pipeline, a second foundation fitting that can be assembled and connected to the first foundation fitting, and a third foundation fitting that can be assembled and connected to the second foundation fitting; the second foundation fitting includes a second fitting body, and the third foundation fitting includes a third fitting body; on the second fitting body and the third fitting body, a first arc surface and a second arc surface for accommodating the pipeline are respectively provided, and the original pipeline can be spanned through the first arc surface and the second arc surface, without the need for temporary demolition of the original pipeline, ensuring the safe operation of the pipeline. At the same time, there is no need to avoid the original pipeline, avoiding the occupation of additional factory area space. Only local excavation is required on both sides of the original pipeline for embedding the first foundation fitting, and no support measures are needed, avoiding safety risks.

[0021] The present invention adopts a variety of construction methods, which can be either the integral casting method or the prefabricated modular assembly method. The installation is simple and efficient, greatly reducing the construction period; a variety of module forms are provided, which are suitable for foundation expansion and different forms of foundation treatment schemes, and are suitable for various complex pipeline layout forms. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The specification drawings forming a part of this embodiment are used to provide a further understanding of this embodiment. The schematic embodiments and descriptions thereof are used to explain this embodiment and do not constitute an improper limitation to this embodiment.

[0023] Figure 1 It is a schematic diagram of the foundation structure of Embodiment 1 of the present invention;

[0024] Figure 2 It is a schematic diagram of the structure of the first foundation fitting of Embodiment 1 of the present invention;

[0025] Figure 3 It is a schematic diagram of the structure of the second foundation fitting of Embodiment 1 of the present invention;

[0026] Figure 4 It is a schematic diagram of the bottom of the second foundation fitting of Embodiment 1 of the present invention;

[0027] Figure 5 It is a schematic diagram of the structure of the third foundation fitting of Embodiment 1 of the present invention;

[0028] Figure 6 It is a schematic diagram of the assembly process of the first foundation fitting and the second foundation fitting of Embodiment 1 of the present invention;

[0029] Figure 7 It is a schematic diagram of the assembly process of the second foundation fitting and the third foundation fitting of Embodiment 1 of the present invention;

[0030] Figure 8Schematic diagram of the assembly and reinforcement of the second and third basic components in Embodiment 1 of the present invention;

[0031] Figure 9 Schematic diagram of the basic structure in Embodiment 2 of the present invention;

[0032] Figure 10 Schematic diagram of the structure of the third basic component in Embodiment 2 of the present invention;

[0033] Figure 11 Schematic diagram of the bottom of the third basic component in Embodiment 2 of the present invention;

[0034] Figure 12 Schematic diagram of the basic structure in Embodiment 3 of the present invention;

[0035] Figure 13 Schematic diagram of the structure of the third basic component in Embodiment 3 of the present invention;

[0036] Figure 14 Schematic diagram of the bottom of the third basic component in Embodiment 3 of the present invention;

[0037] Wherein, 1 is the first basic component; 101 is the body of the first component; 102 is the first connecting rib; 2 is the second basic component; 201 is the body of the second component; 2011 is the inclined surface; 2012 is the first arc surface; 202 is the first assembly groove; 203 is the first assembly hole; 204 is the first lifting ring; 205 is the second assembly groove; 206 is the second connecting rib; 2061 is the gasket; 2062 is the nut; 207 is the grouting hole; 3 is the third basic component; 301 is the body of the third component; 3011 is the convex surface; 3012 is the second arc surface; 302 is the assembly block; 303 is the second lifting ring; 304 is the fastening step; 305 is the second assembly hole; 306 is the convex platform; 307 is the shear resistance groove; 308 is the third connecting rib; 4 is the pipeline. Detailed implementation manners

[0038] The present invention will be further described below in conjunction with the drawings and embodiments.

[0039] It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0040] Embodiment 1:

[0041] As Figure 1As shown in the figure, taking the crossing of a single pipeline as an example, this embodiment provides a prefabricated crossing foundation, which includes a first foundation fitting 1, a second foundation fitting 2, and a third foundation fitting 3. The first foundation fitting 1 can be embedded on both sides of the pipeline 4 for fixing and / or supporting the second foundation fitting 2; the second foundation fitting 2 can be assembled and connected with the first foundation fitting 1, and the second foundation fitting 2 is used for fixing and / or supporting the third foundation fitting 3, and the third foundation fitting 3 can be assembled and connected with the second foundation fitting 2; the third foundation fitting 3 is used for fixing and / or supporting the upper structure, and other structures can be assembled and connected with the third foundation fitting 3. The upper structure can be a bridge, viaduct, and / or other structures that need to be fixed and / or supported in renovation projects or under-construction projects.

[0042] As Figure 2 shown, optionally, the first foundation fitting 1 includes a first fitting body 101, a first connecting bar 102, etc. The first fitting body 101 can be a pile body, such as a cylindrical pile body, a rectangular pile body, or a pile body with other structural forms. During use, after excavation on both sides of the original pipeline 4, the first fitting bodies 101 on both sides of the pipeline 4 are embedded; the first connecting bar 102 is used to connect the third foundation fitting 3, and the first connecting bar 102 can be set as a steel bar, a threaded anchor bar, or other connecting bar structures.

[0043] As Figure 3 and Figure 4 shown, the second foundation fitting 2 includes a second fitting body 201, a first assembly groove 202, a first assembly hole 203, a first lifting ring 204, a second assembly groove 205, a second connecting bar 206, a grouting hole 207, etc. A slope 2011 is provided on one side of the second fitting body 201, and a first arc surface 2012 is provided on the other side.

[0044] The second fitting body 201 can adopt a structure such as a base; the slope 2011 on one side of the second fitting body 201 realizes the purpose of the second fitting body 201 being lighter at the top and heavier at the bottom during use, improving stability; the first arc surface 2012 on the other side of the second fitting body 201 can cooperate with the second arc surface 3012 of the third foundation fitting 3 to accommodate the pipeline 4, avoiding the temporary removal of the pipeline 4. Combined with the embedding of the first fitting bodies 101 on both sides of the pipeline 4, the foundation realizes the crossing on the pipeline 4, does not need to avoid the original pipeline 4, achieves the purpose of avoiding occupying additional factory area space, and only needs to locally excavate the ground on both sides of the pipeline 4 without taking support measures, avoiding safety risks.

[0045] A first assembly groove 202 is formed on the second fitting body 201, and the number of the first assembly grooves 202 can match the number of the pre-embedded first fitting bodies 101; the first assembly groove 202 can be a cylindrical groove, a rectangular groove or a groove of other structures, and the specific structural form of the first assembly groove 202 is adapted to the assembly end (the end provided with the first connecting rib 102) of the first fitting body 101; when the first basic fitting 1 and the second basic fitting 2 are assembled, the assembly end of the first fitting body 101 is assembled in the first assembly groove 202 to improve the assembly stability.

[0046] A first assembly hole 203 is formed in the first assembly groove 202, and the number and layout of the first assembly holes 203 can be adapted to the number and layout of the first connecting ribs 102; when the first basic fitting 1 and the second basic fitting 2 are assembled, the first connecting ribs 102 are inserted into the first assembly holes 203 at corresponding positions, and then the first connecting ribs 102 and the first assembly holes 203 are fixedly connected by grouting or other means to improve the connection stability after assembly.

[0047] A plurality of first lifting rings 204 are provided on the second fitting body 201. When the first basic fitting 1 and the second basic fitting 2 are assembled, the second basic fitting 2 is lifted by means of a lifting device with the aid of the first lifting rings 204, and then the second basic fitting 2 is assembled on the pre-embedded first basic fitting 1.

[0048] A second assembly groove 205 is formed on the second fitting body 201, and the second assembly groove 205 is used to cooperate with the assembly block 302 in the third basic fitting 3 to improve the assembly stability. The second assembly groove 205 can be set as a rectangular groove or a groove of other structural forms. The second assembly groove 205 can be a rectangular groove, a cross-shaped groove or other grooves, and the corresponding assembly block 302 can be a rectangular block, a cross-shaped block or other block structures.

[0049] A second connecting rib 206 is further provided on the second fitting body 201; the second connecting rib 206 is used to connect the third basic fitting 3, and the second connecting rib 206 can be set as a steel bar, a threaded anchor bar or other connecting rib structures. Preferably, a threaded anchor bar is adopted. During installation, after the second connecting rib 206 passes through the second assembly hole 305 on the third basic fitting 3, it can be fixed by means of a gasket 2061 and a nut 2062. The gasket 2061 can adopt an integral or multiple independent plate-like structures, and through holes for passing through the second connecting rib 206 are formed on the gasket 2061. The internal thread of the nut 2062 is meshed and matched with the external thread on the second connecting rib 206.

[0050] Optionally, a grouting hole 207 is provided on the side of the second fitting body 201. The grouting hole 207 can communicate with the first fitting hole 203 and the first fitting groove 202. When the fitting end of the first fitting body 101 is fitted in the first fitting groove 202 and the first connecting rib 102 is inserted into the first fitting hole 203 at the corresponding position, the reinforcement between the first fitting body 10 and the first fitting groove 202 and the reinforcement between the first connecting rib 102 and the first fitting hole 203 are realized by grouting into the grouting hole 207.

[0051] As Figure 5 shown, the third basic fitting 3 includes a third fitting body 301, a fitting block 302, a second lifting ring 303, a fastening step 304, a second fitting hole 305, a boss 306, a shear key groove 307, a third connecting rib 308, etc.

[0052] The overall shape of the third fitting body 301 can be an arc structure. For example, one side of the third fitting body 301 is a convex surface 3011 and the other side is a second arc surface 3012. The convex surface 3011 is the outer surface of the arc structure, and the second arc surface 3012 is the inner surface of the arc structure. Optionally, the radius of the second arc surface 3012 is equal to the radius of the first arc surface 2012. Both ends of the second arc surface 3012 are fitted with the corresponding first arc surface 2012 to accommodate the pipeline 4, realizing the crossing of the foundation over the pipeline 4, eliminating the need to avoid the original pipeline 4, achieving the purpose of avoiding occupying additional plant area space, and avoiding the temporary removal of the pipeline 4. At the same time, combined with the pre-embedding of the first fitting body 101 on both sides of the pipeline 4, no support measures are required, avoiding safety risks.

[0053] The fitting blocks 302 are provided on both end faces of the third fitting body 301. The size and structure form of the fitting blocks 302 are adapted to the second fitting groove 205. The second fitting groove 205 cooperates with the fitting blocks 302 to improve the fitting stability.

[0054] A plurality of second lifting rings 303 are provided on the third fitting body 301. When the second basic fitting 2 and the third basic fitting 3 are assembled, using a lifting device, the third basic fitting 3 is lifted by means of the second lifting rings 303, and then the third basic fitting 3 is assembled on the second basic fitting 2.

[0055] The third fitting body 301 is further provided with fastening steps 304, and each step of the fastening steps 304 is provided with a second assembly hole 305; the number and layout of the second assembly holes 305 can be adapted to the number and layout of the second connecting ribs 206.

[0056] When the second basic fitting 2 and the third basic fitting 3 are assembled, the second connecting rib 206 is inserted into the second assembly hole 305 at the corresponding position, and then the second connecting rib 206 and the second assembly hole 305 are fixedly connected by means of grouting and / or bolt connection, etc., so as to improve the connection stability after assembly; for example, an anchor rib with threads is adopted. During installation, after the second connecting rib 206 passes through the second assembly hole 305, it can be fixed by means of a gasket 2061 and a nut 2062; the second assembly hole 305 can also serve as a grouting hole, and the grout is injected through the second assembly hole 305 between the second assembly hole 305 and the second connecting rib 206, and between the assembly block 302 and the second assembly groove 205, thus improving the assembly connection stability.

[0057] In the third fitting body 301, a boss 306 can also be provided at the middle position of the convex surface 3011. One end of the boss 306 away from the convex surface 3011 is provided with a shear-resistant groove 307 and a third connecting rib 308; it can be understood that in the upper structure assembled on the third basic fitting 3, a shear-resistant block adapted to the shear-resistant groove 307 is provided, and a connecting hole matching the third connecting rib 308 is provided. The connecting hole and the third connecting rib 308 can also be fixedly connected by means of grouting and / or bolt connection, etc.

[0058] The bolts, connecting ribs, lifting rings, etc. in this embodiment can be made of steel structure, and the others can be made of reinforced concrete structure. One of the construction processes or working principles of this embodiment is:

[0059] Such as Figure 6 、 Figure 7 and Figure 8As shown in the figure, taking the pile foundation treatment as an example, the soil on one side of the original pipeline 4 is excavated to the design elevation, and the first foundation fitting 1 is embedded by driving piles. To ensure the safety of the pipeline 4, a pile foundation scheme with less vibration is preferably adopted. The second foundation fitting 2 is lifted by the first lifting ring 204, and the first connecting bar 102 is inserted into the first assembly hole 203. After being in place, grouting is carried out through the grouting hole 207, and it stops when the grout continuously overflows from the overflow hole on the other side of the second fitting body 201; the installation of the second foundation fitting 2 is completed; the soil on the other side of the pipeline 4 is excavated and the installation of all the second foundation fittings 2 is completed in the same way. After reaching the design strength, the third foundation fitting 3 is lifted by the second lifting ring 303, the second connecting bar 206 is inserted into the second assembly hole 305, which can be realized by means of guiding ropes, and the assembly block 302 is inserted into the first assembly groove 202. A gap can be left between the first assembly groove 202 and the assembly block 302 to facilitate the inflow of grout. The installation gasket 2061 and nut 2062 are installed, and the nut 2062 is welded firmly to complete the installation of the third foundation fitting 3. A space is left between the third foundation fitting 3 and the pipeline 4 to avoid the damage to the pipeline 4 caused by foundation settlement, etc.; the upper structure can be installed by using the shear key groove 307 and the third connecting bar 308, which will not be elaborated here.

[0060] In this embodiment, through the cross-bridge foundation structure, the purpose of not temporarily demolishing the original pipeline is achieved, and the implementation is completed on the premise of ensuring the safe operation of the pipeline 4. The foundation can be set without avoiding the original pipeline 4, avoiding the occupation of additional factory area space. The foundation is set by only locally excavating both sides of the pipeline 4 and does not require special support measures, avoiding safety risks.

[0061] Embodiment 2:

[0062] As Figure 9 、 Figure 10 and Figure 11 shown, taking the crossing of double pipelines as an example, this embodiment provides a prefabricated crossing foundation. Different from Embodiment 1, the second arc surface 3012 in the third fitting body 301 is two mutually intersecting arc structural surfaces for accommodating the crossing double pipes.

[0063] Embodiment 3:

[0064] As Figure 12 、 Figure 13 and Figure 14 shown, taking the crossing of multiple pipelines as an example, this embodiment provides a prefabricated crossing foundation. Different from Embodiment 1 and Embodiment 2, the second arc surface 3012 in the third fitting body 301 is multiple mutually intersecting arc structural surfaces for accommodating multiple pipelines.

[0065] In other embodiments, the second arc surface 3012 in the third fitting body 301 can be set according to the specific crossing and layout forms of the pipeline 4, which will not be elaborated here.

[0066] Embodiment 4:

[0067] This embodiment provides a prefabricated spanning foundation construction method, which uses the prefabricated spanning foundation described in Embodiment 1, Embodiment 2 and / or Embodiment 3, including:

[0068] The first foundation fittings 1 are respectively embedded on both sides of the original pipeline 4, then the second foundation fittings 2 are assembled on the first foundation fittings 1, and the third foundation fittings 3 are assembled on the second foundation fittings 2; the original pipeline 4 is located within the first arc surface 2012 and the second arc surface 3012. Only the ground on both sides of the pipeline 4 is locally excavated in this embodiment, and no special pipeline support measures are required, avoiding safety risks.

[0069] The above are only the preferred embodiments of this embodiment and are not used to limit this embodiment. For those skilled in the art, various changes and modifications can be made to this embodiment. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this embodiment shall be included within the protection scope of this embodiment.

Claims

1. A prefabricated spanning foundation, characterized in that, It includes a first basic fitting that can be embedded on both sides of a pipeline, a second basic fitting that can be assembled and connected to the first basic fitting, and a third basic fitting that can be assembled and connected to the second basic fitting; The second basic fitting includes a second fitting body, and the third basic fitting includes a third fitting body; on the second fitting body and the third fitting body, a first arc surface and a second arc surface for accommodating the pipeline are respectively provided.

2. The prefabricated crossing foundation according to claim 1, characterized in that, The first basic fitting includes a first fitting body and a first connecting rib provided at one end of the first fitting body.

3. The prefabricated spanning foundation according to claim 2, characterized in that, A first assembly groove at one end of the second fitting body; a first assembly hole matching with the first connecting rib is provided in the first assembly groove; a second assembly groove and a second connecting rib are provided at the other end of the second fitting body.

4. The prefabricated spanning foundation according to claim 3, characterized in that, A slope is provided on one side surface of the second fitting body, and the first arc surface is provided on the other side surface.

5. The prefabricated spanning foundation according to claim 3, characterized in that, The second assembly groove is a long groove.

6. The prefabricated spanning foundation according to claim 5, characterized in that An assembly block is provided at one end of the third fitting body, and the assembly block is a rectangular block; the assembly block is assembled in the second assembly groove.

7. The prefabricated spanning foundation according to claim 6, characterized in that, A fastening step is provided at the other end of the third fitting body, and a second assembly hole matching with the second connecting rib is provided on the fastening step.

8. The prefabricated spanning foundation according to claim 6, characterized in that, A boss is provided at one end of the third fitting body away from the second arc surface, and a shear-resistant groove is provided on the boss; third connecting ribs are provided around the shear-resistant groove.

9. The prefabricated spanning foundation according to claim 6, characterized in that, The second assembly groove is a cross groove; the assembly block is a cross block.

10. A prefabricated spanning foundation construction method, characterized in that, The prefabricated spanning foundation as described in any one of claims 1-9 is used, including: The first basic fittings are respectively embedded on both sides of the original pipeline, then the second basic fittings are assembled on the first basic fittings, and the third basic fittings are assembled on the second basic fittings; the original pipeline is located within the first arc surface and the second arc surface.

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