CN220520990U - Deep miscellaneous soil roadbed supporting structure that fills - Google Patents
Deep miscellaneous soil roadbed supporting structure that fills Download PDFInfo
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- CN220520990U CN220520990U CN202321946030.2U CN202321946030U CN220520990U CN 220520990 U CN220520990 U CN 220520990U CN 202321946030 U CN202321946030 U CN 202321946030U CN 220520990 U CN220520990 U CN 220520990U
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- 239000002689 soil Substances 0.000 title claims description 32
- 239000004567 concrete Substances 0.000 claims abstract description 38
- 238000002955 isolation Methods 0.000 claims abstract description 12
- 230000002787 reinforcement Effects 0.000 claims description 52
- 239000000463 material Substances 0.000 claims description 31
- 230000007704 transition Effects 0.000 claims description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 239000002131 composite material Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 33
- 238000011049 filling Methods 0.000 abstract description 25
- 238000009412 basement excavation Methods 0.000 abstract description 11
- 230000009286 beneficial effect Effects 0.000 abstract description 6
- 101100495270 Caenorhabditis elegans cdc-26 gene Proteins 0.000 description 10
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- 230000002349 favourable effect Effects 0.000 description 2
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- 238000001556 precipitation Methods 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
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- 238000005056 compaction Methods 0.000 description 1
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- 238000013461 design Methods 0.000 description 1
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- 238000003912 environmental pollution Methods 0.000 description 1
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- 125000006850 spacer group Chemical group 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
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- Road Paving Structures (AREA)
Abstract
The utility model belongs to the technical field of road engineering, and particularly relates to a deep and thick miscellaneous fill road foundation supporting structure. The utility model relates to a deep and thick miscellaneous fill road foundation supporting structure, which comprises supporting piles, body expanding piles and isolating layers; the supporting piles are arranged on the side wall of the foundation pit and used for supporting the road foundation; the body expansion pile is arranged in the foundation pit, and a bearing platform is arranged at the top of the body expansion pile; the isolating layer covers a plane surrounded by the supporting piles and is respectively connected with the supporting piles and the expanding piles; the isolation layer comprises a plain concrete cushion layer and a reinforced cushion layer, and at least part of the reinforced cushion layer is positioned above the bearing platform in the direction perpendicular to the plane of the bearing platform. The deep and miscellaneous filling road base supporting structure of the utility model can treat the deep and miscellaneous filling without adopting a large-excavation post-replacement filling mode, thereby being beneficial to reducing the influence of foundation pit excavation on the surrounding environment, greatly saving the cost of supporting, dewatering, earthwork excavation, backfilling and the like, and greatly reducing the construction period and the construction cost.
Description
Technical Field
The utility model belongs to the technical field of road engineering, and particularly relates to a deep and thick miscellaneous fill road foundation supporting structure.
Background
With the rapid development of Chinese economy, the urban process is accelerated, municipal pipeline engineering construction is more and more, and problems in construction engineering also emerge. In municipal pipeline engineering construction, how to treat a deep and miscellaneous earth-filled road base becomes a difficult problem for constructors. Traditional municipal pipeline construction is often to excavate ground to the design degree of depth earlier, carries out pipeline laying afterwards, carries out soil body backfill after the completion of laying, and road surface construction. However, the prior art usually adopts a machine to roll the foundation for treatment after backfilling, the strength can meet the requirements in a short time, but the phenomena of subgrade sinking, insufficient bearing capacity and the like can occur after a certain time. And for the deep and miscellaneous fill road foundation, if the deep and miscellaneous fill is processed by adopting a large excavation back-filling mode, the influence on the surrounding environment can be increased, the construction period and the construction cost can be greatly improved, the road traffic can not be recovered, and inconvenience is caused to engineering and urban traveling.
In terms of construction, the traditional technology has complex construction procedures and complicated site construction organization, has great influence on surrounding environment, and is easy to induce accidents during construction. For municipal pipeline construction engineering, the longer the construction period is, the larger the influence on urban travel and financial burden is, and in order to accelerate the construction period and reduce environmental pollution and engineering cost, development of a treatment technology for deep and deep miscellaneous earth-filled road base is urgently needed.
Accordingly, there is a need to provide an improved solution to the above-mentioned deficiencies of the prior art.
Disclosure of Invention
The utility model aims to provide a deep and thick miscellaneous fill roadbed supporting structure, which aims to solve or improve at least one of the problems of complex construction procedures, uneven settlement easily occurring after filling the roadbed, high engineering cost and long construction period in the traditional technology.
In order to achieve the above object, the present utility model provides the following technical solutions: a deep and thick miscellaneous fill road foundation supporting structure comprises supporting piles, body expansion piles and isolating layers; the supporting piles are arranged on the side wall of the foundation pit and used for supporting the road foundation; the body expansion pile is arranged in the foundation pit, and a bearing platform is arranged at the top of the body expansion pile; the isolating layer covers a plane surrounded by the supporting piles and is respectively connected with the supporting piles and the expanding piles; the isolation layer comprises a plain concrete cushion layer and a reinforced cushion layer, and at least part of the reinforced cushion layer is positioned above the bearing platform in the direction perpendicular to the plane of the bearing platform.
Preferably, the reinforcement mat comprises a first layer of reinforcement material and a second layer of reinforcement material; the first layer of reinforcement material is arranged above the bearing platform; the second layer of reinforcement material is disposed within the reinforcement mat at an end thereof remote from the plain concrete mat.
Preferably, the reinforcement mat further comprises compacted cemented soil filled between the second layer of reinforcement material and the plain concrete mat.
Preferably, the first layer of reinforced material is a steel sheet mesh and/or a geogrid; the second layer of reinforcement material is a steel plate net and/or a geogrid.
Preferably, the upper surface of the plain concrete cushion layer is flush with the upper surface of the expansion pile, and the thickness of the plain concrete cushion layer is 150-300mm; the reinforced cushion layer is arranged above the plain concrete cushion layer, and the thickness of the reinforced cushion layer is 800-1200mm.
Preferably, at least part of the expansion pile comprises expansion materials, prefabricated hollow pile bodies and core filling concrete from outside to inside in sequence.
Preferably, a reinforcement cage is further arranged between the expanded pile and the bearing platform, and the reinforcement cage is used for connecting the expanded pile and the bearing platform; the reinforcement cage comprises stirrups, end plates and anchor reinforcements which are connected in sequence, wherein the stirrups are positioned in the prefabricated hollow pile body, the end plates are positioned on the upper surface of the expanded pile, and the anchor reinforcements are positioned in the bearing platform.
Preferably, the support pile adopts a stiff composite pile, and a crown beam is arranged at the top of the support pile.
Preferably, a transition structure is arranged between the support piles and the road surface; one end of the transition structure is attached to the upper surface of the road surface, and the other end of the transition structure is attached to the upper surface of the crown beam.
The beneficial effects are that:
the deep and miscellaneous filling road base supporting structure of the utility model can treat the deep and miscellaneous filling without adopting a large-excavation post-replacement filling mode, thereby being beneficial to reducing the influence of foundation pit excavation on the surrounding environment, greatly saving the cost of supporting, dewatering, earthwork excavation, backfilling and the like, and greatly reducing the construction period and the construction cost. In addition, the isolation layer covers the whole foundation pit, so that load sharing of the mixed filling soil between piles is reduced, and uneven settlement of the filling soil after the road subgrade can be reduced. The arrangement of the isolation layer is favorable for forming a curtain integrated structure with the support piles, and a U-shaped closed body similar to a river bed is formed, so that water and harmful gas can be prevented from entering the backfill soil layer, a protection effect is achieved on pipelines, and the structure of the backfill soil layer is stable and beneficial for a long time. In addition, the double-layer isolation layer has the functions of cushion layer and isolation protection.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. Wherein:
FIG. 1 is a schematic cross-sectional view (taken along the width of the road) of a deep and heterogeneous backfill matrix support structure according to an embodiment of the present utility model;
FIG. 2 is an enlarged schematic view of the pile and spacer of FIG. 1;
fig. 3 is an enlarged schematic view of the reinforcement cage of fig. 2.
Reference numerals:
1-supporting piles; 2-expanding pile; 3-plain concrete cushion; 4-a reinforced cushion layer; a 5-transition structure;
11-crown beam;
2A-expanded material; 2B-prefabricating a hollow pile body; 2C-core concrete; 21-a bearing platform; 22-reinforcement cage; 221-stirrups; 222-end plates; 223-anchoring the steel bar;
41-a first layer of reinforcement material; 42-a second layer of reinforcement material; 43-tamping the cement soil.
Detailed Description
The following description of the technical solutions in the embodiments of the present utility model will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which are derived by a person skilled in the art based on the embodiments of the utility model, fall within the scope of protection of the utility model.
In the description of the present utility model, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.
In the description of the present utility model, a number means one or more, a number means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first" and "second" may explicitly or implicitly include one or more features.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the term "connected" should be construed broadly, and for example, it may be a fixed connection or an active connection, or it may be a detachable connection or a non-detachable connection, or it may be an integral connection; may be mechanically connected, may be electrically connected, or may be in communication with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements, indirect communication or interaction relationship between the two elements.
The present utility model will be described in detail with reference to examples. It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.
Aiming at the problems that the prior conventional technology is complex in construction process, uneven settlement is easy to occur after the roadbed is filled with soil, the construction cost is high or the construction period is long, the utility model provides a deep and miscellaneous soil-filled roadbed supporting structure.
The deep and thick miscellaneous fill road foundation supporting structure comprises supporting piles 1, expanded piles 2 and isolating layers; the support piles 1 are arranged on the side walls of the foundation pit and are used for supporting the road foundation; the body-expanding pile 2 is arranged in the foundation pit range (the soil property of the foundation pit is deep and mixed filled soil), and a bearing platform 21 is arranged at the top of the body-expanding pile 2; the isolating layer covers the plane surrounded by the support piles 1 and is respectively connected with the support piles 1 and the expanding piles 2; the isolation layer comprises a plain concrete cushion layer 3 and a reinforced cushion layer 4, and at least part of the reinforced cushion layer 4 is positioned above the bearing platform 21 in the direction perpendicular to the plane of the bearing platform 21.
The deep and miscellaneous filling road base supporting structure of the utility model can treat the deep and miscellaneous filling without adopting a large-excavation post-replacement filling mode, thereby avoiding the influence of foundation pit excavation on the surrounding environment, greatly saving the cost of supporting, dewatering, earthwork excavation, backfilling and the like, and greatly reducing the construction period and the construction cost. In addition, the isolation layer covers the whole foundation pit, so that load sharing of the mixed filling soil between piles is reduced, and uneven settlement of the filling soil after the road subgrade can be reduced. The arrangement of the isolation layer is favorable for forming a curtain integrated structure with the support pile 1, forms a U-shaped closed body similar to a river bed, can prevent water and harmful gas from entering the backfill soil layer, plays a role in protecting pipelines, and is beneficial to long-term stability of the backfill soil layer structure. In addition, the double-layer isolation layer has the functions of cushion layer and isolation protection.
The expanded pile 2 (i.e., pile formed by coating cement slurry, cement soil mixture, cement mortar, fine stone concrete and the like outside the precast pile to form two or more layers of materials inside and outside) in the deep and thick mixed filling road base supporting structure is beneficial to improving the vertical bearing capacity and the horizontal bearing capacity of the concrete pile. By "at least part of the reinforcement mat 4 is located above the abutment 21" it is meant that the reinforcement mat 4 has a certain thickness, in the thickness direction of the reinforcement mat 4, part of the reinforcement mat 4 is located above the abutment 21, and another part of the reinforcement mat 4 may be flush with the abutment 21 or at the gaps between the abutment 21. Wherein, the bearing platform 21 can be C30 concrete. When the upper part is replaced and filled for excavation, the expanded pile 2 at the edge of the foundation pit is meshed with plain concrete between piles to form a supporting curtain integrated supporting structure, and when the underground water level is higher (such as 2m below the natural ground), the supporting structure is only used as a supporting structure.
In a preferred embodiment of the deep and heterogeneous earth-filled road-base support structure of the present utility model, the reinforcement mat 4 comprises a first layer of reinforcement material 41 and a second layer of reinforcement material 42; a first layer of reinforcement material 41 is arranged above the platform 21; a second layer of reinforcement material 42 is provided in the reinforcement mat 4 at an end remote from the plain concrete mat 3.
In a preferred embodiment of the deep and miscellaneous fill foundation support structure of the present utility model, the reinforcement mat 4 further comprises compacted cement soil 43, the compacted cement soil 43 being filled between the second layer of reinforcement material 42 and the plain concrete mat 3. The reinforced cushion layer covers the whole foundation, effectively reduces load sharing of the mixed filling soil between piles, and can reduce uneven settlement of the filling soil after the road subgrade.
Preferably, the compacted cemented soil is prepared from cohesive soil and cement by stirring, paving, compacting or compacting, and the compacted cemented soil 43 has a strength of not less than 1MPa.
More preferably, the amount of cement in the compacted cemented soil 43 is 6wt% to 10wt% (e.g., 6wt%, 7wt%, 8wt%, 9wt%, or 6 wt%).
In a preferred embodiment of the deep and heterogeneous earth-filled road base support structure of the present utility model, the first reinforcement material is a steel sheet mesh and/or a geogrid; the second reinforcement material is a steel sheet mesh and/or a geogrid.
In the preferred embodiment of the deep and miscellaneous fill foundation support structure of the present utility model, the upper surface of the plain concrete cushion layer 3 is flush with the upper surface of the expanded pile 2, and the thickness of the plain concrete cushion layer 3 is 150-300mm (e.g., 150mm, 190mm, 230mm, 260mm or 300 mm); the reinforcement mat 4 is disposed over the plain concrete mat 3, and the reinforcement mat 4 has a thickness of 800-1200mm (e.g., 800mm, 900mm, 1000mm, 1100mm, or 1200 mm).
In the preferred embodiment of the deep and heterogeneous filling road foundation supporting structure, at least part of the expanded pile 2 comprises an expanded material 2A, a prefabricated hollow pile body 2B and filling concrete 2C from outside to inside. Wherein, the body expansion material 2A can be fine stone concrete; the prefabricated hollow pile body 2B can be a concrete pile; the core concrete 2C may be a C30 strength grade concrete.
In the preferred embodiment of the deep and thick mixed filling road foundation supporting structure, a reinforcement cage 22 is further arranged between the expanded pile 2 and the bearing platform 21, and the reinforcement cage 22 is used for connecting the expanded pile 2 and the bearing platform 21; the reinforcement cage 22 comprises stirrups 221, end plates 222 and anchor reinforcement 223 which are connected in sequence, the stirrups 221 are positioned in the prefabricated hollow pile body, the end plates 222 are positioned on the upper surface of the expanded pile 2, and the anchor reinforcement 223 is positioned in the bearing platform 21.
In the preferred embodiment of the deep and heterogeneous earth-filled road foundation supporting structure, the supporting piles 1 are stiff composite piles, and the crown beams 11 are arranged at the tops of the supporting piles 1. Wherein, the crown beam 11 can be made of C30 concrete.
In the preferred embodiment of the deep and thick mixed filling road base supporting structure, a transition structure 5 is arranged between the supporting piles 1 and the road surface, one end of the transition structure 5 is attached to the upper surface of the road surface, and the other end of the transition structure 5 is attached to the upper surface of the crown beam 11.
Preferably, the transition structure 5 is a 60mm thick C20 sprayed concrete facing, internally fitted with a steel sheet mesh.
When the deep and miscellaneous soil-filled roadbed supporting structure of the present utility model is constructed, a construction process including the steps of: the construction site is leveled, and construction preparation is made; (2) Constructing a fine stone concrete expanded body material 2A by adopting a long spiral pressure grouting method, implanting a prefabricated hollow pile body 2B (concrete pile) into the expanded body material 2A by adopting static pile equipment, and injecting core filling concrete 2C into the prefabricated hollow pile body; (3) B, excavating upper impurity filled soil in layers to reach a designed elevation, and adopting a precipitation measure when precipitation is needed; (4) pouring a construction plain concrete cushion layer 3; (5) Binding reinforcing steel bars by the support templates, and pouring a concrete bearing platform 21 (also called a pile cap); (6) pouring and constructing the reinforced cushion layer 4; (7) laying underground pipelines layer by layer, and backfilling plain soil to the top of the pipe; (8) backfilling plain soil above the compaction pipeline in a layered manner; and (9) road engineering construction.
After the treatment by the deep and thick mixed filling road base treatment technology, the construction period is shortened compared with the planned construction period, the influence on the surrounding environment is low, the uneven settlement of the road surface after the construction is finished is less, the whole engineering cost is saved by more than 1000 ten thousand yuan, and the expected standard is reached.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (9)
1. The deep and thick miscellaneous fill road foundation supporting structure is characterized by comprising supporting piles, expanding piles and isolating layers;
the supporting piles are arranged on the side wall of the foundation pit and used for supporting the road foundation;
the body expansion pile is arranged in the foundation pit, and a bearing platform is arranged at the top of the body expansion pile;
the isolating layer covers a plane surrounded by the supporting piles and is respectively connected with the supporting piles and the expanding piles;
the isolation layer comprises a plain concrete cushion layer and a reinforced cushion layer, and at least part of the reinforced cushion layer is positioned above the bearing platform in the direction perpendicular to the plane of the bearing platform.
2. The deep and heterogeneous earth-filled roadway-based support structure of claim 1, wherein the reinforcement mat comprises a first layer of reinforcement material and a second layer of reinforcement material;
the first layer of reinforcement material is arranged above the bearing platform;
the second layer of reinforcement material is disposed within the reinforcement mat at an end thereof remote from the plain concrete mat.
3. The deep miscellaneous fill road base support structure as described in claim 2, wherein said reinforcement mat further comprises compacted cemented soil, said compacted cemented soil being filled between said second layer of reinforcement material and said plain concrete mat.
4. The deep and heterogeneous earth-filled roadway-based support structure of claim 2, wherein the first layer of reinforced material is a steel sheet mesh and/or a geogrid;
the second layer of reinforcement material is a steel plate net and/or a geogrid.
5. The deep and miscellaneous fill foundation support structure of claim 1, wherein the upper surface of the plain concrete cushion layer is flush with the upper surface of the expanded pile, and the thickness of the plain concrete cushion layer is 150-300mm;
the reinforced cushion layer is arranged above the plain concrete cushion layer, and the thickness of the reinforced cushion layer is 800-1200mm.
6. The deep and miscellaneous fill foundation support structure as described in claim 1, wherein at least a portion of said expanded pile comprises, in order from outside to inside, expanded material, prefabricated hollow pile body and filled concrete.
7. The deep and miscellaneous fill road foundation support structure as described in claim 6, wherein a reinforcement cage is further arranged between the expanded pile and the bearing platform, and is used for connecting the expanded pile and the bearing platform;
the reinforcement cage comprises stirrups, end plates and anchor reinforcements which are connected in sequence, wherein the stirrups are positioned in the prefabricated hollow pile body, the end plates are positioned on the upper surface of the expanded pile, and the anchor reinforcements are positioned in the bearing platform.
8. The deep and miscellaneous fill foundation support structure as described in any of claims 1-7, wherein the support piles are stiff composite piles, and crown beams are provided on the tops of the support piles.
9. The deep and miscellaneous fill road base support structure as described in claim 8, wherein a transition structure is provided between the support piles and the road surface;
one end of the transition structure is attached to the upper surface of the road surface, and the other end of the transition structure is attached to the upper surface of the crown beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321946030.2U CN220520990U (en) | 2023-07-24 | 2023-07-24 | Deep miscellaneous soil roadbed supporting structure that fills |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321946030.2U CN220520990U (en) | 2023-07-24 | 2023-07-24 | Deep miscellaneous soil roadbed supporting structure that fills |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220520990U true CN220520990U (en) | 2024-02-23 |
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ID=89923560
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321946030.2U Active CN220520990U (en) | 2023-07-24 | 2023-07-24 | Deep miscellaneous soil roadbed supporting structure that fills |
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| Country | Link |
|---|---|
| CN (1) | CN220520990U (en) |
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2023
- 2023-07-24 CN CN202321946030.2U patent/CN220520990U/en active Active
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