CN113605163A - Roadbed widening method - Google Patents
Roadbed widening method Download PDFInfo
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- CN113605163A CN113605163A CN202111074291.5A CN202111074291A CN113605163A CN 113605163 A CN113605163 A CN 113605163A CN 202111074291 A CN202111074291 A CN 202111074291A CN 113605163 A CN113605163 A CN 113605163A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C3/00—Foundations for pavings
- E01C3/04—Foundations produced by soil stabilisation
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C3/00—Foundations for pavings
- E01C3/06—Methods or arrangements for protecting foundations from destructive influences of moisture, frost or vibration
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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
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/18—Making embankments, e.g. dikes, dams
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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
- E02D29/02—Retaining or protecting walls
- E02D29/0258—Retaining or protecting walls characterised by constructional features
- E02D29/0266—Retaining or protecting walls characterised by constructional features made up of preformed elements
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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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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/30—Miscellaneous comprising anchoring details
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/40—Miscellaneous comprising stabilising elements
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- General Engineering & Computer Science (AREA)
- Architecture (AREA)
- Environmental & Geological Engineering (AREA)
- Road Paving Structures (AREA)
Abstract
The invention relates to a roadbed widening method, which is characterized in that a roadbed widening structure formed by arranging foamed light soil roadbed building blocks is constructed on one side of an original roadbed layer by layer, after one layer of widening structure is constructed, a retaining wall contacted with the outer side surface of the widening structure is constructed on the outer side of the layer of widening structure, the retaining wall is formed by splicing a plurality of retaining wall modules which are sequentially arranged, the widening structure is constructed layer by layer until a first set height is reached, and the retaining wall is constructed layer by layer until a second set height is reached.
Description
Technical Field
The invention relates to the technical field of road engineering, in particular to a roadbed widening method.
Background
The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The widening of the roadbed is a necessary link for widening and rebuilding of all levels of highways at present, and the filling and widening of the roadbed by using the foamed light soil is a novel technology. At present, the scholars propose to use the foamed lightweight soil building blocks to build the roadbed, so that the construction speed can be greatly improved, the performance of the foamed lightweight soil after building is stable, and a better service state is expected. However, the inventors have found that when a load such as a vehicle load is applied to the foamed lightweight soil block roadbed at the upper portion, sliding along the masonry surface occurs, and a problem of insufficient stability occurs. Therefore, how to improve the stability of the roadbed without affecting the construction speed of the light roadbed building block is a problem which needs to be solved urgently.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a roadbed widening method, which improves the stability of the widened roadbed under the condition of not reducing the construction speed of light roadbed building blocks.
In order to achieve the purpose, the invention adopts the following technical scheme:
the embodiment of the invention provides a roadbed widening method, which is characterized in that a roadbed widening structure formed by arranging foamed light roadbed building blocks layer by layer is constructed on one side of an original roadbed, after one layer of widening structure is constructed, a retaining wall contacted with the outer side surface of the widening structure is constructed on the outer side of the layer of widening structure, the retaining wall is formed by splicing a plurality of retaining wall modules which are sequentially arranged, the widening structure is constructed layer by layer until a first set height is reached, and the retaining wall is constructed layer by layer until a second set height is reached.
Optionally, the specific construction method includes the following steps:
step 1: paving a first layer of widening structure on the foundation corresponding to the set widening part;
step 2: excavating a foundation pit at the outer side of the first layer of widened structure, constructing a set layer of retaining wall in the foundation pit, backfilling the foundation pit, and then continuously constructing the retaining wall layer by layer until the height of the retaining wall is higher than that of the first layer of widened structure;
and 4, step 4: constructing a second layer of widened structure on the first layer of widened structure, and after the second layer of widened structure is constructed, continuously constructing retaining walls on the constructed retaining walls layer by layer until the height of the retaining walls is greater than that of the second layer of widened structure;
and 5: and (4) repeating the step (4) until the height of the widened structure reaches a first set height, and the height of the retaining wall reaches a second set height.
Optionally, before the first layer widening structure is laid, a step structure is excavated on the side face of the original roadbed.
Optionally, the retaining wall module comprises a module body, the four side faces of the module body are provided with splicing structures, and the module body can be spliced and connected with the adjacent retaining wall modules through the splicing structures.
Optionally, the splicing structure is of an L-shaped structure and comprises a first splicing portion and a second splicing portion, one end of the first splicing portion is fixed to the side face of the module body, the other end of the first splicing portion is perpendicularly connected with the second splicing portion, and the orientations of the second splicing portions of the splicing structure connected to the two opposite side faces of the module body are opposite.
Optionally, when the retaining wall modules are spliced, cement mortar is coated on the surfaces of the spliced structures of the two adjacent retaining wall modules, which are used for contacting.
Optionally, when the foamed light soil roadbed building block is used for constructing and widening the structure, cement mortar is smeared on the surface of the foamed light soil roadbed building block, which is used for being in contact with the adjacent foamed light soil roadbed building block.
Optionally, the bottom surface of the foamed light soil roadbed building block is provided with a groove.
Optionally, the anchor tie bar is passed in the retaining wall module of setting for, the tip that sets up the anchor pile of anchor tie bar passes the retaining wall module and passes through the recess that widens the structure back and stretch into original road bed through foam light dirt road bed building block bottom surface setting, and the other end utilizes anchor assembly and retaining wall module to fix.
Optionally, the groove of the foamed lightweight roadbed building block is filled with pervious concrete.
The invention has the beneficial effects that:
1. according to the roadbed widening method, after a layer of widening structure formed by the foam light soil roadbed building blocks is constructed, the retaining wall is constructed, so that the lateral pressure generated by the foam light soil roadbed building blocks can be borne by the retaining wall, the foam light soil roadbed building blocks are prevented from sliding along the masonry surface, and the stability of the widening structure is improved.
2. According to the roadbed widening method, the adjacent retaining wall modules are spliced and connected by adopting the splicing structure, the construction speed is high, and the construction speed of the light roadbed building blocks is not influenced.
3. According to the roadbed widening method, the anchor tie bars and the anchor piles are arranged, and the anchor piles extend into the original roadbed, so that the stability of the widened roadbed is improved, and the roadbed is improved in the aspects of floating resistance, sliding resistance and the like.
4. According to the roadbed widening method, the grooves are formed in the bottom surfaces of the foamed light soil roadbed building blocks, so that the foamed light soil roadbed building blocks are convenient to carry, and can be used as a roadbed drainage channel.
5. According to the roadbed widening method, before the widening structure is constructed, the step structure is excavated on the side face of the original roadbed so as to adapt to the cross slope of the road surface, and the foam light roadbed building blocks can be in better lap joint with the original roadbed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
Fig. 1 is a schematic view of a retaining wall module structure according to embodiment 1 of the present invention;
fig. 2 is a schematic structural view of a retaining wall module for passing anchor lacing wires according to embodiment 1 of the present invention;
FIG. 3 is a schematic view of the construction of a foamed lightweight roadbed block according to the embodiment of the present invention 1;
FIG. 4 is a schematic view of the construction state of embodiment 1 of the present invention;
FIG. 5 is a side view showing the construction state in example 1 of the present invention;
FIG. 6 is a schematic view of anchor lacing wire construction in embodiment 1 of the present invention;
the concrete block comprises a module body 1, a first splicing part 2, a second splicing part 3, a through hole 4, a foam light soil roadbed building block 5, a groove 6, an original roadbed 7, a foundation 8, an anchor tie bar 9, an anchor pile 10 and an anchor nut 11.
Detailed Description
Example 1
The embodiment discloses a roadbed widening method, which adopts a widening structure and a retaining wall formed by foam light roadbed building blocks to widen the roadbed. The structure of widening that foam light dirt road bed building block constitutes widens structure and original road bed overlap joint, widens original road bed, the barricade contacts with the lateral surface of widening the structure for undertake and widen the horizontal yawing force that the structure produced, guarantee roadbed structure's stability.
As shown in fig. 1, the retaining wall can be formed by splicing a plurality of retaining wall modules, each retaining wall module comprises a module body 1, four side surfaces of each module body are provided with splicing structures, and adjacent retaining wall modules can be spliced and connected through the splicing structures.
The splicing structure adopts an L-shaped structure and comprises a first splicing part 2 and a second splicing part 3, one end of the first splicing part is fixed with the side surface of the module body, the other end of the first splicing part is vertically fixed with the second splicing part, the second splicing part is positioned in the splicing structure of two opposite side surfaces of the module body, and the orientation of the two second splicing parts is opposite.
In this embodiment, the thickness of the first splicing part parallel to the side direction of the module body is 1/3 of the thickness of the module body, and one side of the first splicing part is parallel to the side of the module body, the length of the first splicing part is consistent with the width of the module body, the width of the first splicing part perpendicular to the side of the module body is 3/14 of the length of the module body, the thickness of the second splicing part parallel to the side direction of the module body is 2/3 of the thickness of the module body, the length of the second splicing part is consistent with the width of the module body, and the width of the second splicing part perpendicular to the side direction of the module body is 3/14 of the length of the module body.
When the mode is adopted for splicing, after two adjacent module bodies are spliced, the side faces of the widened structures can be parallel and level with the side faces away from the widened structures, and a complete wall face of the retaining wall is formed.
In other embodiments, the adjacent retaining wall modules are spliced by using the form of the insert blocks and the slots, and those skilled in the art can select the adjacent retaining wall modules according to actual needs, and the details are not described herein.
As shown in fig. 2, a through hole 4 is formed in the module body of the retaining wall module for passing the anchor tie bar.
The retaining wall module is formed by pouring concrete in a factory in advance, and when the retaining wall module is used, the retaining wall module is directly transported to a construction site.
In this embodiment, according to the actual use requirement, a through hole may be further formed in the module body, and the through hole is used for the anchor lacing wire to pass through.
As shown in fig. 3, the foam light soil roadbed block 5 is prefabricated in a factory by a cube block and is transported to a construction site when in use, and two grooves 6 are arranged on the bottom surface of the block, so that the transportation of the foam light soil roadbed block is facilitated, and meanwhile, the block plays a role of draining water in the foam light soil roadbed block, so that the interior of the foam light soil roadbed is kept dry; the groove can also be used as a channel of the anchor lacing wire, so that the position where the anchor lacing wire needs to be arranged passes through the anchor lacing wire and is connected with the anchor pile at the end part in the original stabilized roadbed to transfer the lateral force received by the retaining wall.
Further, in order to prevent the foam lightweight soil roadbed building block from being soaked in water for a long time, the top surface and the mulching film of the foam lightweight soil roadbed building block are covered with waterproof geomembranes.
In this embodiment, the sum of the length of the whole length machine module body and the splicing mechanism of the retaining wall module is 1/2 or 1/3 of the length of the foamed lightweight roadbed block, namely, the size of the retaining wall module is 1/2 or 1/3 of the length of the foamed lightweight roadbed block along the vertical direction during construction.
The used elements further comprise anchor lacing wires and anchoring parts, anchor piles are arranged at the end parts of the anchor lacing wires, and the anchoring parts adopt anchoring nuts with strength meeting requirements. The anchor nut can be in threaded connection with the anchor lacing wire.
Furthermore, the anchor lacing wire adopts hot-rolled ribbed steel bars, so that the anchor lacing wire is convenient to be connected with an anchor nut, and the gripping force of the anchor lacing wire and the anchor pile at the end part can be increased.
Furthermore, the anchor pile is made of materials such as rapid hardening expansion cement or modified resin, and firm combination between the stable road base body and the anchor lacing wire needs to be ensured.
In an application example, the total length of the retaining wall formed by the retaining wall modules is 3m, the total height of the retaining wall is 2m, the size of the module body of a single retaining wall module is 140 × 60mm, and the size of the first splicing part is as follows: 140 x 30 x 20mm, the size of the second spliced part is 140 x 30 x 40mm, the size of the foamed light soil roadbed building block is 600 x 600mm, and the size of the recess is 600 x 80 mm; the original roadbed height is 1.8 m.
The length of the anchor lacing wire is 5m, the model is HRB335, and the diameter is phi 20; the model of the anchoring nut is M22; the length of the anchor pile at the end part is 0.5m, and the diameter is 0.1 m.
As shown in fig. 4 to fig. 5, the roadbed widening method of the embodiment includes the following specific steps:
step 1: and excavating a step structure on the side surface of the original roadbed 7, and leveling and widening the foundation 8 corresponding to the roadbed.
Step 2: laying a first layer of widening structure at the position of the foundation corresponding to the widened roadbed, wherein the first layer of widening structure is composed of a plurality of foam light soil roadbed building blocks 5 built on the foundation, cement mortar is smeared on the surfaces of the foam light soil roadbed building blocks, which are used for contacting, the adjacent foam light soil roadbed building blocks are connected through the cement mortar, and the grooves on the bottom surfaces of the foam light soil roadbed building blocks are filled with pervious concrete.
And step 3: and after the construction of the first-layer widened structure is finished, excavating a foundation pit at the outer side boundary of the first-layer widened structure along the boundary of the first-layer widened structure, wherein the depth of the foundation pit is the length of 2-3 retaining wall modules.
The retaining wall is constructed layer by layer in a foundation pit, each layer of retaining wall is formed by splicing a plurality of retaining wall modules through a splicing structure, during splicing, cement mortar is firstly smeared on the surface of the splicing structure for contacting, then two adjacent retaining wall modules are spliced, after the first layer of retaining wall is spliced, the second layer of retaining wall is spliced above the first layer of retaining wall by adopting the same method, the retaining wall module of the second layer is connected with the retaining wall module of the first layer below through the splicing structure, after the second layer of retaining wall is constructed, the foundation pit is backfilled, the first layer of retaining wall and the second retaining wall are buried in a foundation, then the retaining wall is constructed layer by layer continuously, and the height of the retaining wall is higher than that of the first layer of widened structure.
In this embodiment, the retaining wall is in contact with the outer side surface of the first widened structure, and is configured to bear a lateral force generated by sliding of the foam light soil roadbed building block of the first widened structure along the masonry surface, and meanwhile, along with construction of the retaining wall, a waterproof geomembrane is disposed between the retaining wall and the widened structure.
And 4, step 4: and constructing a second layer of widened structure on the first layer of widened structure, wherein the foamed light soil roadbed building blocks of the second layer of widened structure, which are close to the original roadbed, are lapped and placed on the step surface formed by excavating the original roadbed, and the construction method of the second layer of widened structure is the same as that of the first layer of widened structure, and repeated description is not repeated here.
As shown in fig. 6, in this embodiment, before the construction of the second-layer widened structure, the anchor tie bars 9 are arranged above the first-layer widened structure, the anchor piles 10 at the end portions of the anchor tie bars are inserted into the soil body of the original roadbed, and the other end portions of the anchor piles extend out of the boundary of the widened structure. And after the anchor lacing wires are constructed, building a second layer of foam lightweight soil roadbed building blocks. And the anchor lacing wire passes through the groove on the bottom surface of the second layer of foam lightweight soil roadbed building block. And filling the groove with pervious concrete.
And after the second-layer widened structure is constructed, the retaining wall is continuously constructed layer by layer on the constructed retaining wall, the anchor tie bar penetrates through the retaining wall module, the anchor tie bar and the retaining wall are fixed by using the anchor nut 11, and the retaining wall is constructed until the height of the retaining wall is higher than that of the second-layer widened structure.
And 5: and (4) constructing the widened structure and the retaining wall layer by adopting the method in the step (4) until the height of the widened structure reaches a first set height, and the height of the retaining wall reaches a second set height which is not more than the first set height.
The working principle of the embodiment is as follows:
the retaining wall module bears the lateral pressure of the foam lightweight soil subgrade.
The retaining wall modules are mutually occluded through the splicing structures to transmit stress to the retaining wall modules buried in the foundation.
The retaining wall module penetrating through the anchor tie bars transmits stress through the anchor tie bars and is in the stabilizing soil body through the end anchor piles, and the overall stability of the roadbed is improved.
The end anchor pile is positioned in the stabilized road foundation soil body and cannot slide.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive efforts by those skilled in the art based on the technical solution of the present invention.
Claims (10)
1. A roadbed widening method is characterized in that a roadbed widening structure formed by arranging foamed light roadbed building blocks layer by layer is constructed on one side of an original roadbed, after each layer of widening structure is constructed, a retaining wall which is in contact with the outer side face of the widening structure is constructed on the outer side of the layer of widening structure, the retaining wall is formed by splicing a plurality of retaining wall modules which are sequentially arranged, the widening structure is constructed layer by layer until a first set height is reached, and the retaining wall is constructed layer by layer until a second set height is reached.
2. The roadbed widening method of claim 1, wherein the specific construction method comprises the following steps:
step 1: paving a first layer of widening structure on the foundation corresponding to the set widening part;
step 2: excavating a foundation pit at the outer side of the first layer of widened structure, constructing a set layer of retaining wall in the foundation pit, backfilling the foundation pit, and then continuously constructing the retaining wall layer by layer until the height of the retaining wall is higher than that of the first layer of widened structure;
and 4, step 4: constructing a second layer of widened structure on the first layer of widened structure, and after the second layer of widened structure is constructed, continuously constructing retaining walls on the constructed retaining walls layer by layer until the height of the retaining walls is greater than that of the second layer of widened structure;
and 5: and (4) repeating the step (4) until the height of the widened structure reaches a first set height, and the height of the retaining wall reaches a second set height.
3. A method of widening a subgrade according to claim 2, in which a step structure is excavated on the side of the existing subgrade before the first layer of widening structure is laid.
4. The roadbed widening method according to claim 1, wherein the retaining wall modules comprise module bodies, splicing structures are arranged on four sides of each module body, and the module bodies can be spliced and connected with adjacent retaining wall modules through the splicing structures.
5. The roadbed widening method according to claim 4, wherein the splicing structure is an L-shaped structure and comprises a first splicing part and a second splicing part, one end of the first splicing part is fixed to one side surface of the module body, the other end of the first splicing part is vertically connected with the second splicing part, and the orientation of the second splicing part of the splicing structure connected to the two opposite side surfaces of the module body is opposite.
6. The roadbed widening method as claimed in claim 4, wherein cement mortar is applied to the surfaces of the spliced structures of two adjacent retaining wall modules for contact when the retaining wall modules are spliced.
7. The roadbed widening method of claim 1, wherein when the widened structure is constructed by using the foamed light soil roadbed block, cement mortar is applied to the surface of the foamed light soil roadbed block, which is used for being in contact with the adjacent foamed light soil roadbed block.
8. The roadbed widening method of claim 1, wherein the bottom surface of the foam lightweight roadbed block is provided with a groove.
9. The roadbed widening method according to claim 8, wherein an anchor tie bar is passed through a set retaining wall module, the end of the anchor tie bar, on which an anchor pile is disposed, is passed through the retaining wall module and is passed through the widening structure through a groove formed in the bottom surface of the foamed lightweight roadbed block, and then is extended into the original roadbed, and the other end is fixed with the retaining wall module by an anchor.
10. A roadbed widening method according to claim 8, wherein the grooves of the foamed lightweight roadbed block are filled with pervious concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111074291.5A CN113605163A (en) | 2021-09-14 | 2021-09-14 | Roadbed widening method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111074291.5A CN113605163A (en) | 2021-09-14 | 2021-09-14 | Roadbed widening method |
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| CN113605163A true CN113605163A (en) | 2021-11-05 |
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| CN202111074291.5A Pending CN113605163A (en) | 2021-09-14 | 2021-09-14 | Roadbed widening method |
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| CN110439003A (en) * | 2019-09-10 | 2019-11-12 | 中兵勘察设计研究院有限公司 | Detachable construction of soil-nailed wall method and soil nailing wall structure |
| CN209958164U (en) * | 2019-04-30 | 2020-01-17 | 福建省龙祥建设集团有限公司 | Foam light soil high-fill roadbed widening structure |
| CN111441206A (en) * | 2020-03-04 | 2020-07-24 | 山东大学 | Composite reinforced lightweight soil retaining wall roadbed integrated structure and construction method |
| CN111851185A (en) * | 2020-07-27 | 2020-10-30 | 河海大学 | Self-compacting cement soil widening roadbed and construction method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000073302A (en) * | 1998-08-28 | 2000-03-07 | Takagi Packs:Kk | Constructing method for structure |
| KR20020065910A (en) * | 2000-10-19 | 2002-08-14 | 쇼헤이 치다 | Unitized civil engineering structure, unit used therefor, and construction method of unitized civil engineering structure |
| US20120178542A1 (en) * | 2009-07-13 | 2012-07-12 | Permavoid Limited | Activity Surfaces Using Structural Modules |
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| CN111851185A (en) * | 2020-07-27 | 2020-10-30 | 河海大学 | Self-compacting cement soil widening roadbed and construction method |
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