CN115075076B - High-fill and low-soil composite roadbed structure and construction method - Google Patents
High-fill and low-soil composite roadbed structure and construction method Download PDFInfo
- Publication number
- CN115075076B CN115075076B CN202210858696.6A CN202210858696A CN115075076B CN 115075076 B CN115075076 B CN 115075076B CN 202210858696 A CN202210858696 A CN 202210858696A CN 115075076 B CN115075076 B CN 115075076B
- Authority
- CN
- China
- Prior art keywords
- prefabricated
- shaped frame
- frame members
- soil
- cantilever
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000002689 soil Substances 0.000 title claims abstract description 40
- 239000002131 composite material Substances 0.000 title claims abstract description 24
- 238000010276 construction Methods 0.000 title claims abstract description 22
- 210000002435 tendon Anatomy 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 238000004873 anchoring Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 239000002390 adhesive tape Substances 0.000 claims description 6
- 229920005549 butyl rubber Polymers 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 229920002635 polyurethane Polymers 0.000 claims description 6
- 239000004814 polyurethane Substances 0.000 claims description 6
- GNFTZDOKVXKIBK-UHFFFAOYSA-N 3-(2-methoxyethoxy)benzohydrazide Chemical compound COCCOC1=CC=CC(C(=O)NN)=C1 GNFTZDOKVXKIBK-UHFFFAOYSA-N 0.000 claims description 3
- 239000010426 asphalt Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 238000000338 in vitro Methods 0.000 claims description 2
- 230000002787 reinforcement Effects 0.000 claims description 2
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- General Engineering & Computer Science (AREA)
- Architecture (AREA)
- Road Paving Structures (AREA)
Abstract
The invention relates to a high-filling and low-soil composite roadbed structure and a construction method, wherein the composite roadbed structure comprises a prefabricated h-shaped frame structure, a separated prefabricated strip-shaped foundation, roadbed filling and a pavement structure layer; the two adjacent prefabricated h-shaped frame structures are oppositely arranged in a staggered mode with the length of 1/2 prefabricated sections, the adjacent vertical walls are connected through a high-strength bolt system, the prestressed tendons between the two adjacent prefabricated h-shaped frame structures oppositely pulled top plates form a triangular stress area, and the cantilever sections of the prefabricated h-shaped frame structures form the prestressed cantilever retaining wall through the prestressed tendons pulled between the cantilever sections and the top plates. The invention adopts the prefabricated h-shaped frame members and a small amount of filling soil to form the composite roadbed structure, has simple structure and ingenious structure, effectively enlarges the span, does not need to put the slope width, only needs a small amount of filling soil, and can effectively solve the problem of soil shortage of the high-fill road section in the plain area; the prefabricated h-shaped frame member has multiple functions of double-layer passing, bearing, soil retaining and the like.
Description
Technical Field
The invention relates to the technical field of high-fill-section composite roadbeds in plain soil-lack areas, in particular to a high-fill-section composite roadbed structure and a construction method.
Background
Along with the continuous acceleration of the urban process, villages and towns around the expressway project are dense, enterprises are numerous, and land resources are tense. Especially in plain areas, the soil shortage problem is serious, if the roadbed is filled by adopting an old mode, namely a soil taking mode of a soil taking pit, in the construction process, a large amount of cultivated land is occupied, and the land utilization planning along the line and the existing industry pattern are damaged, so that the local economic development is influenced. The highway high-fill road section in the plain area adopts the traditional soil-stone structure roadbed, a large amount of soil is needed to fill, the soil is dug in a large range to destroy the original landform and vegetation, the original water storage and soil conservation capacity is reduced, the ground surface is exposed, the surface soil corrosion resistance is reduced, and a certain influence is caused on the ecological system along the highway.
In the technical aspect, the conventional soil-stone structure roadbed has complex construction procedures, more control points, difficult control of construction quality, easy influence of environmental climate factors on construction progress and easy generation of uneven settlement after the roadbed is finished; in the engineering construction process and after the engineering is finished, diseases such as whole sinking or partial sinking of the roadbed, longitudinal and transverse cracking of the roadbed, sliding of the roadbed or sliding of a side slope and the like often occur, and the problems of difficult treatment and influence on driving comfort and driving safety are solved.
Therefore, it is necessary to develop a new high-fill section composite roadbed structure and a construction method to solve the defects of large fill quantity, limited soil taking, wide occupation, complex construction process, uneven settlement and the like of the traditional high-fill roadbed.
Disclosure of Invention
In order to solve the problems, the invention provides a high-fill and soil-less composite roadbed structure which has proper cost, can be constructed continuously and rapidly and occupies small area and a construction method.
The technical scheme adopted by the invention is as follows: a high-fill soil-less composite roadbed structure is characterized in that: the prefabricated h-shaped frame component comprises cantilever sections, arched top plates and vertical walls, wherein two adjacent transverse prefabricated h-shaped frame components are oppositely arranged by adopting the length of a prefabricated section with the dislocation of 1/2, and are fixedly connected through a high-strength bolt system on the vertical walls; a prestress rib is arranged between the arched top plates of two adjacent transverse prefabricated h-shaped frame members, and the arched top plates, the vertical walls and the prestress rib form a triangular stress area, so that the bearing capacity of the prefabricated h-shaped frame members is improved; roadbed filling is longitudinally arranged at the top of the prefabricated h-shaped frame member, and the pavement structure layer is arranged on the roadbed filling; and a tensioning prestressed rib is arranged between the cantilever section of the prefabricated h-shaped frame member and the arched top plate to form the prestressed cantilever retaining wall.
Preferably, the prefabricated h-shaped frame member is prefabricated by a factory, the length of each prefabricated section is 4m, the height of the vertical wall is adjusted according to the height of the roadbed, the height of the cantilever section is not more than 2m, the transverse span of the prefabricated h-shaped frame member is 15m at most, the thickness of the arched top plate is 0.5m, and the weight of each prefabricated section is less than 50t.
Preferably, the cantilever section is used as a cantilever retaining wall, the bolt hole is reserved at the inner side of the cantilever section for installing a lacing wire, the cantilever section is provided with a transverse rib plate, the thickness of the rib plate is 0.4m, a prestressed duct and a water draining hole are reserved in the rib plate, and the prestressing tendon is tensioned between the cantilever section and the arched top plate, so that the retaining capacity is improved.
Preferably, two adjacent longitudinal prefabricated h-shaped frame members are connected through a pre-buried bolt system on an arched top plate, polyurethane waterproof materials are embedded into the prefabricated sections for pointing, and butyl rubber ropes and waterproof adhesive tapes are paved on the surfaces of the prefabricated sections.
Preferably, the split type prefabricated strip foundation comprises a plurality of prefabricated strip foundation segments, the segments of each foundation are 4m in length and are provided with concave grooves, and the prefabricated h-shaped frame member vertical wall is connected with the foundation through an inserted anchoring system.
Preferably, the thickness of the roadbed filling soil is suitable for 0.5-4.5 m.
Preferably, the stretching prestress steel bundles between the arched top plates of the two adjacent transverse prefabricated h-shaped frame members are in external prestress, pore passages are reserved between the two adjacent arched top plates, and cables can be replaced at the later stage according to requirements.
Preferably, the plug-in anchoring system comprises grouting, a threaded anchor bolt and a bonding anchor bolt.
Preferably, the embedded bolt system between the two longitudinally adjacent prefabricated h-shaped frame members comprises a backing plate matched with the radian of the arched top plate and embedded expansion bolts.
A construction method of a high-fill and low-soil composite roadbed structure comprises the following steps:
step a), prefabricating an h-shaped frame member and a separated foundation in a factory, wherein a groove is reserved at the top of the foundation corresponding to the position of the prefabricated member vertical wall of the tunnel body;
b), transporting the prefabricated strip-shaped foundation to the site, constructing by adopting a conventional foundation construction method, burying the foundation into the ground, and controlling the error of the elevation of the foundation within an allowable range;
C), transporting the prefabricated h-shaped frame members to the site, installing two prefabricated h-shaped frame members of the 1 st section by a crane, inserting the prefabricated h-shaped frame members into concave grooves of a separated foundation, connecting the prefabricated h-shaped frame members by an inserted anchoring system, arranging two adjacent prefabricated h-shaped frame members in opposite directions with the length of the prefabricated section being staggered by 1/2, pouring asphalt between vertical wall gaps of the two adjacent prefabricated h-shaped frame members after the foundation grouting reaches the design strength, and connecting the two adjacent prefabricated h-shaped frame members by a high-strength bolt system;
step d), installing tie bars on cantilever sections of the prefabricated h-shaped frame members, wherein the tie bars are connected with the cantilever sections through bolts, and bolt holes for installing the tie bars are reserved on the cantilever sections;
Step e), penetrating a prestress steel beam into a prestress rib pipeline reserved between a cantilever section of the prefabricated h-shaped frame member and the arched top plate, wherein the prestress steel beam is externally arranged on a corrugated pipe, and the later corrugated pipe is not grouted;
f), repeating the steps c) to e), installing the 2 nd section to the n th section to prefabricate the h-shaped frame members, connecting the longitudinally adjacent prefabricate sections through a pre-buried bolt system, embedding polyurethane waterproof materials into the prefabricate sections for pointing, and paving butyl rubber ropes and waterproof adhesive tapes on the surfaces of the prefabricate sections;
step g), after the prefabricated members are assembled and before earth filling, grouting and sealing the foundation trench and the lifting hole are needed;
Step h), roadbed filling is carried out on the top of the prefabricated h-shaped frame member, a water drain pipe is installed, the water drain pipe is connected with a water drain hole reserved on a bridge-crossing cantilever section, the roadbed filling is filled in layers, and manual tamping is carried out;
and i) tensioning a prestress system between the cantilever section and the arched roof and a prestress system between the arched roof of two transversely adjacent prefabricated h-shaped frame members, and performing roadbed and pavement structure layer construction by adopting a conventional process after tensioning.
The beneficial effects obtained by the invention are as follows: the invention adopts the prefabricated h-shaped frame members and a small amount of filling soil to form the composite roadbed structure, has simple structure and ingenious structure, effectively enlarges the span, does not need to put the slope width, only needs a small amount of filling soil, and can effectively solve the problem of soil shortage of the high-fill road section in the plain area; the prefabricated h-shaped frame member has multiple functions of double-layer passing, bearing, soil retaining and the like, and the prefabricated h-shaped frame member and the separated foundation are of prefabricated structures, so that the prefabricated h-shaped frame member is beneficial to industrial production, construction speed is increased, and construction quality is improved.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic structural view of a prefabricated h-shaped frame member of the present invention;
FIG. 3 is a schematic structural view of a split prefabricated strip foundation according to the present invention;
FIG. 4 is a schematic view of the connection of two adjacent prefabricated h-shaped frame members in the longitudinal direction;
FIG. 5 is a schematic illustration of a cantilever structure;
Fig. 6 is a schematic structural view of the bolting system of the invention.
FIGS. 7-8 are longitudinal elevational schematic views of the connection of a vertical wall to a separate prefabricated strip foundation;
FIG. 9 is a schematic view of a longitudinal elevation of a bolted connection of two longitudinally adjacent prefabricated h-shaped frame members.
FIG. 10 is a schematic longitudinal elevation of a cantilever section;
Reference numerals: 10. prefabricating an h-shaped frame member; 11. a cantilever section; 111. transverse rib plates; 112. a water discharge hole; 113. a lacing wire is arranged in the bolt hole; 12. an arched top plate; 13. standing a wall; 20. separating prefabricated strip-shaped foundations; 30. a first prestressed tendon; 31. a stress tunnel; 40. a second prestressed tendon; 50. a high-strength bolt system; 60. filling soil into the roadbed; 61. filling a soil layer; 62. a drain pipe; 70. a pavement structural layer; 80. an anchoring system; 81. grouting; 82. a threaded anchor bolt; 83. bonding anchor bolts; 90. a bolt system; 91. a backing plate; 92. an expansion bolt.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1 to 10, the high-fill soil-less composite roadbed structure of the present invention comprises a prefabricated h-shaped frame member 10, a separated prefabricated strip foundation 20, roadbed filling soil 60 and a pavement structure layer 70, wherein the prefabricated h-shaped frame member 10 comprises a cantilever section 11, an arched top plate 12 and a vertical wall 13, two adjacent prefabricated h-shaped frame members 10 are oppositely arranged in a staggered 1/2 prefabricated section length manner, and are fixedly connected through a high-strength bolt system 50 on the vertical wall 13; a second prestressed rib 40 is arranged between the arched top plates 12 of two adjacent transverse prefabricated h-shaped frame members 10, and the arched top plates 12, the vertical walls 13 and the second prestressed ribs 40 form a triangular stress area, so that the bearing capacity of the prefabricated h-shaped frame members 10 is improved; the top of the prefabricated h-shaped frame member 10 is longitudinally provided with roadbed filling 60, and a pavement structure layer 70 is arranged on the roadbed filling 60; a first prestressed reinforcement 30 is arranged between the cantilever section 11 of the prefabricated h-shaped frame member 10 and the arched top plate 12 to form a prestressed cantilever retaining wall.
In this embodiment, the prefabricated h-shaped frame 10 is prefabricated in a factory, the length of each prefabricated segment is 4m, the height of the vertical wall 13 is adjusted according to the height of the roadbed, the height of the cantilever section 11 is not more than 2m, the transverse span of the prefabricated h-shaped frame 10 is 15m at maximum, the thickness of the arched roof 12 is 0.5m, and the weight of each prefabricated segment is less than 50t.
In this embodiment, the cantilever segment 11 is used as a cantilever retaining wall, the bolt hole is reserved at the inner side of the cantilever segment 11 to install the tie bar 113, the cantilever segment 11 is provided with the transverse rib plate 111, the thickness of the rib plate 111 is 0.4m, the prestressed duct 31 and the drain hole 112 are reserved in the rib plate 111, and the first prestressed bar 30 is stretched between the cantilever segment 11 and the arched roof 12 to improve the retaining capacity.
In this embodiment, two adjacent longitudinal prefabricated h-shaped frame members 10 are connected through a pre-buried bolt system 90 on an arched top plate 12, polyurethane waterproof materials are embedded into the prefabricated sections for pointing, and butyl rubber ropes and waterproof adhesive tapes are paved on the surfaces of the prefabricated sections.
In this embodiment, the split-type prefabricated strip foundation 20 comprises a plurality of prefabricated strip foundation segments, each of which has a segment length of 4m and is provided with a groove 21, and the bottoms of the vertical walls 13 of the prefabricated h-shaped frame members 10 are connected with the grooves 21 by means of the inserted anchoring systems 80.
In this embodiment, the thickness of the roadbed filling 60 is suitably 0.5-4.5 m.
In this embodiment, the second tendons 40 are tensioned between the arched top plates 12 of two adjacent prefabricated h-shaped frame members 10 to be pre-stressed in vitro, and a hole is reserved between the two adjacent arched top plates 12, and the cable can be replaced at the later stage according to the requirement.
In this embodiment, the male anchor system 80 includes a grout 81, a threaded anchor 82, and a bonding anchor 83.
In this embodiment, the embedded bolt system 90 between two longitudinally adjacent prefabricated h-shaped frame members 10 comprises a backing plate 91 and an embedded expansion bolt 92 matched with the arc of the arched roof.
A construction method of a high-fill and low-soil composite roadbed structure comprises the following steps:
step a), prefabricating an h-shaped frame member 10 and a separated prefabricating strip-shaped foundation 20 in a factory, wherein a groove (a groove 21) is reserved at the top of the separated prefabricating strip-shaped foundation 20 corresponding to the position of a vertical wall 13 of the prefabricated h-shaped frame member 10;
step b), transporting the prefabricated separated type prefabricated strip foundation 20 to the site, and constructing by adopting a conventional foundation construction method, wherein the separated type prefabricated strip foundation 20 is required to be buried underground, and the error of the elevation of the separated type prefabricated strip foundation 20 is required to be controlled within an allowable range;
Step c), the prefabricated h-shaped frame members 10 are transported to the site, two prefabricated h-shaped frame members 10 of the 1 st section are installed through a crane, the prefabricated h-shaped frame members 10 are inserted into grooves 21 of a separated prefabricated strip-shaped foundation 20 and then are connected through an inserted anchoring system 80, two adjacent prefabricated h-shaped frame members 10 are oppositely arranged in a staggered mode by 1/2 of the length of the prefabricated section, after the grooves 21 are grouted to reach the design strength, asphalt is poured between gaps of vertical walls 13 of the two adjacent prefabricated h-shaped frame members 10, and the prefabricated h-shaped frame members are connected through a high-strength bolt system 50;
Step d), installing tie bars on the cantilever sections 11 of the prefabricated h-shaped frame members 10, connecting the tie bars with the cantilever sections 11 through bolts, and reserving bolt holes for installing the tie bars on the cantilever sections 11;
Step e), penetrating a prestress steel beam into a prestress rib pipeline reserved by the cantilever section 11 of the prefabricated h-shaped frame member 10 and the arched top plate 12, wherein the prestress steel beam is externally provided with a corrugated pipe, and the later corrugated pipe is not grouted;
F), repeating the steps c) to e), installing the 2 nd section to the n th section to prefabricate the h-shaped frame member 10, connecting the longitudinally adjacent prefabricate sections through a pre-buried bolt system 90, embedding polyurethane waterproof materials into the prefabricate sections for pointing, and paving butyl rubber ropes and waterproof adhesive tapes on the surfaces of the prefabricate sections;
step g), after the prefabricated members are assembled and before earth filling, grouting and sealing the foundation trench and the lifting hole are needed;
Step h), roadbed filling 61 is carried out on the top of the prefabricated h-shaped frame member 10, a water drain pipe 62 is installed, the water drain pipe 62 is connected with a water drain hole reserved in the cross-bridge cantilever section 11, the roadbed filling is filled in layers, and manual tamping is carried out;
And i), tensioning a prestress system between the cantilever section 11 and the arched roof 12 and a prestress system between the arched roof 12 of two adjacent transverse prefabricated h-shaped frame members 10, and constructing the roadbed and pavement structure layer 70 by adopting a conventional process after tensioning.
The foregoing has shown and described the basic principles and main structural features of the present invention. The present invention is not limited to the above examples, and various changes and modifications may be made therein without departing from the spirit and scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Here, it should be noted that the description of the above technical solution is exemplary, and the present specification may be embodied in different forms and should not be construed as being limited to the technical solution set forth herein. Rather, these descriptions will be provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. Furthermore, the technical solution of the invention is limited only by the scope of the claims.
The shapes, dimensions, ratios, angles, and numbers disclosed for describing aspects of the present specification and claims are merely examples, and thus, the present specification and claims are not limited to the details shown. In the following description, a detailed description of related known functions or configurations will be omitted when it may be determined that the emphasis of the present specification and claims is unnecessarily obscured.
Where the terms "comprising," "having," and "including" are used in this specification, there may be additional or alternative parts unless the use is made, the terms used may generally be in the singular but may also mean the plural.
It should be noted that although the terms "first," "second," "top," "bottom," "one side," "another side," "one end," "the other end," etc. may be used and used in this specification to describe various components, these components and portions should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, with top and bottom elements, under certain circumstances, also being interchangeable or convertible with one another; the components at one end and the other end may be the same or different in performance from each other.
In describing positional relationships, for example, when positional sequences are described as "on," "above," "below," and "next," unless words or terms such as "just" or "directly" are used, it is also possible to include cases where there is no contact or contact between them. If a first element is referred to as being "on" a second element, it does not mean that the first element must be located above the second element in the figures. The upper and lower portions of the component will change in response to changes in the angle and orientation of the view. Thus, in the drawings or in actual construction, if it is referred to that a first element is "on" a second element, it can comprise the case that the first element is "under" the second element and the case that the first element is "over" the second element. In describing the time relationship, unless "just" or "direct" is used, a case where there is no discontinuity between steps may be included in describing "after", "subsequent" and "preceding". The features of the various embodiments of the invention may be combined or spliced with one another, either in part or in whole, and may be implemented in a variety of different configurations as will be well understood by those skilled in the art. Embodiments of the present invention may be performed independently of each other or may be performed together in an interdependent relationship.
Finally, it should be noted that the above embodiments are merely representative examples of the present invention. Obviously, the invention is not limited to the above-described embodiments, but many variations are possible. Any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention should be considered to be within the scope of the present invention.
Claims (9)
1. A high-fill soil-less composite roadbed structure is characterized in that: the novel road pavement structure comprises prefabricated h-shaped frame members (10), separated prefabricated strip foundations (20), roadbed filling soil (60) and road surface structure layers (70), wherein each prefabricated h-shaped frame member (10) comprises a cantilever section (11), an arched top plate (12) and a vertical wall (13), two adjacent horizontal prefabricated h-shaped frame members (10) are oppositely arranged by adopting the length of a staggered prefabricated section of 1/2, and are fixedly connected through a high-strength bolt system (50) on the vertical wall (13), and the bottoms of the vertical walls (13) are inserted into grooves (21) of the separated prefabricated strip foundations (20); a second prestressed rib (40) is arranged between the arched top plates (12) of two adjacent transverse prefabricated h-shaped frame members (10), the arched top plates (12), the vertical walls (13) and the second prestressed ribs (40) form a triangular stress area, and the bearing capacity of the prefabricated h-shaped frame members (10) is improved; the top of the prefabricated h-shaped frame member (10) is longitudinally provided with roadbed filling soil (60), and the pavement structure layer (70) is arranged on the roadbed filling soil (60); a first prestressed reinforcement (30) is arranged between the cantilever section (11) of the prefabricated h-shaped frame member (10) and the arched top plate (12) to form a prestressed cantilever retaining wall;
the thickness of the roadbed filling soil (60) is suitable for 0.5-4.5 m; the prefabricated h-shaped frame member (10) and a small amount of filling soil are adopted to form a composite roadbed structure, the span is enlarged, the slope width is not required to be put, and the problem of soil shortage of a high-fill road section in a plain area is solved; the prefabricated h-shaped frame member (10) has multiple functions of double-layer passing, bearing and soil retaining.
2. The high fill and low soil composite subgrade structure of claim 1, wherein: the prefabricated h-shaped frame component (10) is prefabricated by adopting a factory, the length of each prefabricated section is 4m, the height of the vertical wall (13) is adjusted according to the height of the roadbed, the height of the cantilever section (11) is not more than 2m, the transverse span of the prefabricated h-shaped frame component (10) is 15m at most, the thickness of the arched top plate (12) is 0.5m, and the weight of each prefabricated section is less than 50t.
3. The high fill and low soil composite subgrade structure of claim 1, wherein: the cantilever section (11) is used as a cantilever retaining wall, and a bolt hole is reserved at the inner side of the cantilever section for installing a lacing wire (113); the cantilever section (11) is provided with a transverse rib plate (111), the thickness of the transverse rib plate (111) is 0.4m, and a prestressed pore canal (31) and a water draining hole (112) are reserved in the transverse rib plate (111).
4. The high fill and low soil composite subgrade structure of claim 1, wherein: two adjacent longitudinal prefabricated h-shaped frame members (10) are connected through a pre-buried bolt system (90) on an arched top plate (12), polyurethane waterproof materials are embedded into the prefabricated sections for pointing, and butyl rubber ropes and waterproof adhesive tapes are paved on the surfaces of the prefabricated sections.
5. The high fill and low soil composite subgrade structure according to claim 4, wherein: the embedded bolt system (90) comprises a backing plate (91) matched with the radian of the arched top plate (12) and embedded expansion bolts (92).
6. The high fill and low soil composite subgrade structure of claim 1, wherein: the split type prefabricated strip foundation (20) comprises a plurality of prefabricated strip foundation sections, the length of each foundation section is 4m, grooves (21) are formed in the foundation sections, and the vertical walls (13) of the prefabricated h-shaped frame members (10) are connected with the grooves (21) through inserted anchoring systems (80).
7. The high fill and low soil composite subgrade structure according to claim 6, wherein: the anchoring system (80) comprises grouting (81), a threaded anchor bolt (82) and a bonding anchor bolt (83).
8. The high fill and low soil composite subgrade structure of claim 1, wherein: the second prestressed tendons (40) are in vitro prestressed, and a pore canal is reserved between two adjacent arched top plates (12).
9. A construction method of a high-fill and low-soil composite roadbed structure comprises the following steps:
Step a), prefabricating an h-shaped frame member (10) and a separated prefabricating strip foundation (20) in a factory, wherein grooves are reserved at the top of the separated prefabricating strip foundation (20) corresponding to the position of a vertical wall (13) of the prefabricated h-shaped frame member (10);
Step b), transporting the prefabricated separated type prefabricated strip foundation (20) to the site, constructing by adopting a conventional foundation construction method, burying the foundation into the ground, and controlling the error of the elevation of the foundation within an allowable range;
c), transporting the prefabricated h-shaped frame members (10) to the site, installing two prefabricated h-shaped frame members of the 1 st section by a crane, inserting the prefabricated h-shaped frame members into grooves (21) of a separated foundation, connecting the prefabricated h-shaped frame members by an inserted anchoring system (80), arranging two adjacent prefabricated h-shaped frame members in opposite directions with the length of the prefabricated section being staggered by 1/2, pouring asphalt between the vertical wall gaps of the two adjacent prefabricated h-shaped frame members after the foundation grouting reaches the design strength, and connecting the two adjacent prefabricated h-shaped frame members by a high-strength bolt system (50);
step d), installing tie bars (113) on the cantilever sections (11) of the prefabricated h-shaped frame members, connecting the tie bars with the cantilever sections through bolts, and reserving bolt holes for installing the tie bars on the cantilever sections;
Step e), penetrating a prestress steel beam into a prestress rib pipeline reserved by the cantilever section (11) of the prefabricated h-shaped frame component and the arched top plate (12), wherein the prestress steel beam is externally arranged on a corrugated pipe, and the later corrugated pipe is not grouted;
F), repeating the steps c) to e), installing the 2 nd section to the n th section to prefabricate the h-shaped frame members, connecting the longitudinally adjacent prefabricate sections through a pre-buried bolt system (90), embedding polyurethane waterproof materials into the prefabricate sections for pointing, and paving butyl rubber ropes and waterproof adhesive tapes on the surfaces of the prefabricate sections;
step g), after the prefabricated members are assembled and before earth filling, grouting and sealing the foundation trench and the lifting hole are needed;
Step h), roadbed filling (60) is carried out at the top of the prefabricated h-shaped frame member, a water drain pipe (62) is installed, the water drain pipe is connected with a water drain hole reserved in a bridge-crossing cantilever section, the roadbed filling is filled in layers, and manual tamping is carried out;
And i), tensioning a first prestressed rib (30) between the cantilever section and the arched top plate and a second prestressed rib (40) between the arched top plates of two transversely adjacent prefabricated h-shaped frame members, and constructing a roadbed and pavement structure layer (70) by adopting a conventional process after tensioning.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210858696.6A CN115075076B (en) | 2022-07-20 | 2022-07-20 | High-fill and low-soil composite roadbed structure and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210858696.6A CN115075076B (en) | 2022-07-20 | 2022-07-20 | High-fill and low-soil composite roadbed structure and construction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115075076A CN115075076A (en) | 2022-09-20 |
| CN115075076B true CN115075076B (en) | 2024-07-19 |
Family
ID=83242496
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210858696.6A Active CN115075076B (en) | 2022-07-20 | 2022-07-20 | High-fill and low-soil composite roadbed structure and construction method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115075076B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201942975U (en) * | 2011-01-17 | 2011-08-24 | 铁道第三勘察设计院集团有限公司 | Cantilever-type frame roadbed structure |
| CN110080043A (en) * | 2019-04-09 | 2019-08-02 | 中国铁路设计集团有限公司 | A kind of horizontal lattice precast assembly segment and its assembled high-speed rail roadbed |
| CN209368867U (en) * | 2018-10-29 | 2019-09-10 | 中铁四院集团西南勘察设计有限公司 | A kind of Steep Slope Embankment retaining structure |
| CN112267337A (en) * | 2020-10-15 | 2021-01-26 | 安徽省交通规划设计研究总院股份有限公司 | Assembled channel type soilless roadbed |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000517387A (en) * | 1996-07-17 | 2000-12-26 | モナキノ，モーセ | Base element, a method of manufacturing a prefabricated structure including these elements, especially prefabricated tunnels and prefabricated structures |
| JP6301718B2 (en) * | 2013-04-19 | 2018-03-28 | 旭化成アドバンス株式会社 | Method for suppressing level difference in roadbed material laid across concrete and earth structures |
| CN107268366B (en) * | 2017-07-05 | 2020-08-07 | 安徽省交通规划设计研究总院股份有限公司 | Assembled wallboard and pile plate combined soilless roadbed |
| KR101920365B1 (en) * | 2017-07-12 | 2018-11-20 | 주식회사 인터컨스텍 | Precast segment arch structure and construction method thereof |
| CN207512521U (en) * | 2017-11-16 | 2018-06-19 | 中铁第四勘察设计院集团有限公司 | A kind of box road structure of railway engineering thin-walled |
| CN109972470A (en) * | 2019-04-10 | 2019-07-05 | 四川省交通勘察设计研究院有限公司 | A kind of assembled subgrade construction system and technique suitable for deep soft foundation |
| CN212128696U (en) * | 2020-03-30 | 2020-12-11 | 安徽省交通规划设计研究总院股份有限公司 | Road bridge links up mixed light dirt road bed structure of section bubble |
| CN111705576A (en) * | 2020-07-01 | 2020-09-25 | 北京工业大学 | Steep slope high-filling roadbed structure adopting high-density EPS filler |
| CN113373750B (en) * | 2021-06-30 | 2022-05-24 | 中铁二院工程集团有限责任公司 | Steep slope high-fill-section roadbed structure and construction method thereof |
-
2022
- 2022-07-20 CN CN202210858696.6A patent/CN115075076B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201942975U (en) * | 2011-01-17 | 2011-08-24 | 铁道第三勘察设计院集团有限公司 | Cantilever-type frame roadbed structure |
| CN209368867U (en) * | 2018-10-29 | 2019-09-10 | 中铁四院集团西南勘察设计有限公司 | A kind of Steep Slope Embankment retaining structure |
| CN110080043A (en) * | 2019-04-09 | 2019-08-02 | 中国铁路设计集团有限公司 | A kind of horizontal lattice precast assembly segment and its assembled high-speed rail roadbed |
| CN112267337A (en) * | 2020-10-15 | 2021-01-26 | 安徽省交通规划设计研究总院股份有限公司 | Assembled channel type soilless roadbed |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115075076A (en) | 2022-09-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107268366B (en) | Assembled wallboard and pile plate combined soilless roadbed | |
| CN104674847A (en) | Novel assembling type precast concrete urban comprehensive pipe gallery and construction method thereof | |
| CN111365018B (en) | Cover arch reinforcement method suitable for small tunnel clearance | |
| CN109555535B (en) | Lower-way truss type prestressed pipe curtain structure and construction method | |
| CN107142856A (en) | Bridge pier and the bridge of lifting reconstruction that abutment remodeling method, abutment, abutment are transformed | |
| CN113502835A (en) | Wet cellular assembled gridwork roof beam slope protection structure of connecting | |
| CN115075076B (en) | High-fill and low-soil composite roadbed structure and construction method | |
| CN111305267A (en) | UHPC prefabricated assembled comprehensive pipe gallery flat curve connecting segment structure and construction method | |
| CN111705576A (en) | Steep slope high-filling roadbed structure adopting high-density EPS filler | |
| CN116716787A (en) | Assembled bridge crossing deep large water karst cave and construction method thereof | |
| CN113187487B (en) | Construction method of double-layer full-section frozen underground excavation station structure of subway | |
| CN210458918U (en) | Space stacked bridge structure | |
| CN111424483B (en) | Short-circuit base transition section structure between expressway bridge tunnels and construction method thereof | |
| CN115404757B (en) | Underground pipeline bridge system of lower overpass | |
| CN219410378U (en) | Rock slope overhanging type road structure | |
| CN108547313A (en) | A kind of curved surface reinforced earth bulkhead panel construction and its assembling method | |
| CN114395984B (en) | Girder construction method of bridge-tunnel cooperative construction structure | |
| CN114382011B (en) | Beam-free construction method of bridge-tunnel cooperative construction structure | |
| CN215758299U (en) | Prefabricated assembled steel-mixed cantilever structure system for widening roads | |
| CN107989059B (en) | Construction method of foundation cushion structure of cast-in-place beam support | |
| CN216043718U (en) | Stereoscopic crossing tunnel structure for power system | |
| CN216198134U (en) | Waterproof novel subway station is led to full row of half package | |
| CN112982131B (en) | Offshore open type airport runway and construction method thereof | |
| CN111101446B (en) | Construction method of soil-covered corrugated steel plate bridge | |
| CN109944132B (en) | Assembled road drainage device of mountain region photovoltaic project |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |