CN115491940B - Highway steel-concrete combined structure roadbed in frozen soil area and construction method - Google Patents
Highway steel-concrete combined structure roadbed in frozen soil area and construction method Download PDFInfo
- Publication number
- CN115491940B CN115491940B CN202211004863.7A CN202211004863A CN115491940B CN 115491940 B CN115491940 B CN 115491940B CN 202211004863 A CN202211004863 A CN 202211004863A CN 115491940 B CN115491940 B CN 115491940B
- Authority
- CN
- China
- Prior art keywords
- pile
- steel
- foundation
- plate
- concrete
- 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
- 239000004567 concrete Substances 0.000 title claims abstract description 89
- 239000002689 soil Substances 0.000 title claims abstract description 31
- 238000010276 construction Methods 0.000 title claims abstract description 18
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 132
- 239000010959 steel Substances 0.000 claims abstract description 132
- 239000011178 precast concrete Substances 0.000 claims abstract description 29
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 17
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 12
- 238000003466 welding Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 5
- 230000000903 blocking effect Effects 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims 7
- 239000011384 asphalt concrete Substances 0.000 abstract description 7
- 238000002844 melting Methods 0.000 abstract description 5
- 230000008018 melting Effects 0.000 abstract description 5
- 239000000945 filler Substances 0.000 abstract description 4
- 238000010257 thawing Methods 0.000 abstract description 2
- 230000021715 photosynthesis, light harvesting Effects 0.000 abstract 1
- 229910000870 Weathering steel Inorganic materials 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009432 framing Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000004381 surface treatment Methods 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000004826 seaming Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000006467 substitution reaction Methods 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
- E01C3/006—Foundations for pavings made of prefabricated single units
-
- 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
Abstract
The invention relates to a highway reinforced concrete combined structure roadbed in a frozen soil area and a construction method. The heat absorbed by the black asphalt concrete pavement in the frozen soil area is conducted to the roadbed below and the permafrost layer, so that a melting disc is formed in the roadbed frozen soil layer, and a thawing and sinking phenomenon occurs. The pile foundation of the pile plate foundation is vertically arranged; the pile plate foundation concrete slab is horizontally arranged above the pile plate foundation pile foundation; the steel webs are vertically arranged at the top of the pile plate foundation concrete slab and are longitudinally arranged at least two, and the bottoms of the steel webs are inserted into the pile plate foundation concrete slab; the precast concrete lane board level sets up at steel web top. The steel-concrete combined structure roadbed adopts steel webs to replace high-standard fillers, has light overall dead weight, and can prevent heat absorbed by a black asphalt concrete pavement from being transferred to a frozen soil layer below; transverse connecting beams are arranged between the steel webs to serve as energy dissipation members, and the purpose of structural earthquake-resistant design is achieved.
Description
Technical Field
The invention relates to the technical field of highway subgrade engineering construction, in particular to a highway reinforced concrete combined structure subgrade in a frozen soil area and a construction method.
Background
The middle-low latitude area of the permafrost zone of the Qinghai-Tibet plateau has the advantages of thin thickness of the permafrost and high ground temperature, and has certain technical challenges in constructing the plateau permafrost engineering. The main reason is that the heat absorbed by the black asphalt concrete pavement is conducted to the roadbed below and the frozen soil layer for many years, so that the frozen soil layer below the roadbed forms a melting disc, a melting and sinking phenomenon occurs, and the roadbed structure is damaged.
In the past, the construction of the Qinghai-Tibet highway follows the design principle of protecting permafrost, and adopts modes of regulating and controlling convection, radiation or conduction and the like to keep the subgrade underlying permafrost layer in a low-temperature state all the time. The construction technology of this special roadbed is high, for example, a large amount of high-standard filler is needed and the compactness is satisfied. For areas with poorer permafrost geological conditions, such as areas with saturated frozen soil and ice layers with soil, engineering researchers have also proposed "bridge-to-road" solutions to replace traditional roadbed forms. However, when the bridge scheme is adopted, frozen soil around the pile foundation is melted to reduce the bearing capacity of the foundation, and the frozen pulling effect has adverse effects on the pile foundation as well, so that the pile foundation needs to be specially designed.
Disclosure of Invention
The invention aims to provide a highway reinforced concrete combined structure roadbed in a frozen soil area and a construction method thereof, which can solve the problem of conducting heat absorbed by a black asphalt concrete pavement to a frozen soil layer downwards for a plurality of years, thereby solving the problem of thawing and sinking of the roadbed in the permafrost area.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
The roadbed comprises pile board foundation pile foundations, pile board foundation concrete slabs, steel webs and precast concrete pavement slabs;
pile foundation of the pile plate foundation is vertically arranged; the pile plate foundation concrete slab is horizontally arranged above the pile plate foundation pile foundation; the steel webs are vertically arranged at the top of the pile plate foundation concrete slab and are longitudinally arranged at least two, and the bottoms of the steel webs are inserted into the pile plate foundation concrete slab; the precast concrete lane board level sets up at steel web top.
Further, a plurality of reinforcing steel bar holes are formed in the bottom of the steel web plate, transverse perforated reinforcing steel bars are inserted into the reinforcing steel bar holes, and the perforated reinforcing steel bars are buried into the pile plate foundation concrete slab.
Further, a horizontal flange plate is arranged at the top of the steel web, shear nails are arranged on the top surface of the flange plate, and the shear nails are embedded into the precast concrete pavement slab.
Further, vertical stiffening ribs are arranged on two sides of the steel web plate, and the vertical stiffening ribs are perpendicular to the steel web plate.
Further, a plurality of transverse connecting beams are arranged between the adjacent steel webs, and are vertically arranged and provided with manholes;
the transverse ends of the transverse connecting beam are connected with the vertical stiffening ribs through the gusset plates and the anchor bolts.
Further, the precast concrete lane board bottom surface is provided with protruding bearing in the position that corresponds the steel web, and protruding bearing longitudinal arrangement, shear force nail are located protruding bearing.
Further, the steel web is a corrugated steel plate.
On the other hand, the construction method of the highway reinforced concrete combined structure roadbed in the frozen soil area comprises the following steps:
Prefabricating a steel web plate, a flange plate and vertical stiffening ribs, assembling and welding to form a steel member;
dividing precast pile plate foundation concrete plates, and accurately positioning the lower parts of the assembled steel members above the pile plate foundation concrete plates; effectively connecting the steel member with the pile plate foundation concrete slab through the steel bar holes and the perforated steel bars at the bottom of the steel web plate; reserving a reinforcing steel bar joint at a blocking position of the pile plate foundation concrete slab;
Constructing a pile board foundation pile foundation, breaking a pile head and reserving pile foundation steel bar binding joints;
and transporting the combined member formed by the steel member and the pile plate foundation concrete slab to the site and installing the combined member at the top of the pile plate foundation pile foundation, temporarily bolting the steel web plate, binding the pile plate foundation pile foundation and the pile plate foundation concrete slab into a whole through reserved connecting steel bars, and connecting the pile plate foundation pile foundation and the pile plate foundation concrete slab into a whole after pouring joints.
Further, the steel web is provided with at least two, and a plurality of transverse connecting beams provided with manholes are installed between the adjacent steel webs, and the transverse two ends of the transverse connecting beams are connected with the vertical stiffening ribs through the gusset plates and the anchor bolts.
Further, vertical through holes are preset in the protruding supporting positions of the precast concrete pavement slabs, shear nails are installed at the tops of the flange slabs, the precast concrete pavement slabs are transported to the site and installed at the tops of the steel webs, and the shear nails are inserted into the vertical through holes of the precast concrete pavement slabs and are connected in a pouring mode.
Compared with the prior art, the invention has the following beneficial effects:
1. in permafrost regions, the steel-concrete combined structure roadbed can obviously reduce the earth and stone filling amount, the construction process has little influence on surrounding natural environment, and the disturbance on the lower frozen soil layer is light.
2. The structure can block heat absorbed by the black asphalt concrete pavement from being transferred into the frozen soil layer below, and avoid forming a melting disc below the roadbed.
3. Compared with the traditional highway subgrade form, the steel web is adopted to replace high-standard filler for the steel-concrete combined structure subgrade, so that the problems that the highway subgrade is difficult to take materials under the condition of plateau construction, the compactness is not up to standard and the like are avoided.
4. Compared with a small-span concrete bridge structure, the steel-concrete combined structure roadbed structure is light in overall self weight and good in integrity, and can form an energy-consumption damping mechanism after being provided with the transverse connecting beams, so that the steel-concrete combined structure has good anti-seismic performance. The lower structure adopts a pile plate structure, and the concrete slab foundation bears most of upper load, so that the drilling depth of the pile foundation can be reduced.
5. The invention adopts the assembled components to carry out assembly construction, the shape of the assembled components is simple, the assembly components are easy to manufacture and process, and the quality control of the structure is ensured.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other embodiments of the drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a standard cross-sectional layout of a first embodiment of the present invention.
Fig. 2 is a cross-sectional layout view of a beam position in accordance with a first embodiment of the present invention.
Fig. 3 is a floor plan of a first embodiment of the present invention.
Fig. 4 is a plan view of a first embodiment of the present invention.
Fig. 5 is a schematic view of a connection structure between a steel web and a concrete slab foundation according to a first embodiment of the present invention.
Fig. 6 is a large sample a in fig. 1.
FIG. 7 is a standard cross-sectional layout of a second embodiment of the present invention.
Fig. 8 is a plan view of a third embodiment of the present invention.
The marks in the figure are as follows:
1-pile board foundation pile foundation, 2-pile board foundation concrete slab, 3-steel web, 4-precast concrete roadway board, 5-transverse connecting beams, 6-flange plates, 7-vertical stiffening ribs, 8-perforated steel bars, 9-steel bar holes, 10-shear nails, 11-node plates, 12-manholes, 13-bulge bearings and 14-road center lines.
Detailed Description
In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. The drawings illustrate preferred embodiments of the invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
In the description of this patent, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate an orientation or a positional relationship based on that shown in the drawings, merely for convenience in describing the patent and simplifying the description, and do not indicate or imply that the devices or elements being referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the patent.
In the description of this patent, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "disposed," and the like are to be construed broadly and may be, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected, disposed. The specific meaning of the terms in this patent will be understood by those of ordinary skill in the art as the case may be.
In a specific implementation, the driving direction is defined as a longitudinal direction, the direction perpendicular to the driving direction is defined as a transverse direction, and in fig. 1, the direction from left to right is the transverse direction.
The invention provides a highway reinforced concrete combined structure roadbed in a frozen soil area, wherein the reinforced concrete combined structure replaces a road with a bridge, and the roadbed adopts a steel web plate to replace high-standard filler, so that the self weight is lightened, and simultaneously, the heat absorbed by a black asphalt concrete pavement can be blocked from being transferred into a frozen soil layer below, and a melting disc is prevented from being formed below the roadbed.
As shown in fig. 1, the roadbed structure specifically comprises a pile board foundation pile foundation 1, a pile board foundation concrete slab 2, a steel web 3 and a precast concrete pavement slab 4. Pile foundation 1 of pile plate foundation is vertically arranged; the pile plate foundation concrete slab 2 is horizontally arranged above the pile plate foundation pile foundation 1; the steel webs 3 are vertically arranged at the top of the pile plate foundation concrete slab 2 and are longitudinally arranged at least two, and the bottoms of the steel webs 3 are inserted into the pile plate foundation concrete slab 2; the precast concrete roadway board 4 is horizontally arranged on top of the steel web 3.
As shown in fig. 5, a horizontal flange plate 6 is arranged at the top of the steel web 3, shear nails 10 are arranged on the top surface of the flange plate 6, and the shear nails 10 are buried in the precast concrete pavement slab 4.
As shown in fig. 3, 4 and 5, the steel web 3 is provided with vertical stiffening ribs 7 on both sides, the vertical stiffening ribs 7 being perpendicular to the steel web 3. The steel web 3 is provided with vertical stiffening ribs 7, so that the stress requirements of local stability and supporting stiffening are met.
As shown in fig. 1 and 6, the bottom surface of the precast concrete pavement slab 4 is provided with a convex bearing 13 corresponding to the position of the steel web 3, the convex bearing 13 is longitudinally arranged, and the shear nails 10 are positioned in the convex bearing 13.
In some embodiments, as shown in fig. 2, a plurality of transverse connecting beams 5 are arranged between the adjacent steel webs 3, the distance between the transverse connecting beams is 8m-15m, and the transverse connecting beams 5 are vertically arranged and provided with manholes 12; the transverse connecting beam 5 is connected with the vertical stiffening rib 7 at the transverse two ends through the gusset plate 11 and the anchor bolts. The steel web 3 is suitably perforated to provide ventilation and maintenance functions.
In some embodiments, as in fig. 8, the steel web 3 is a corrugated steel plate, increasing lateral bending stiffness.
In some embodiments, as shown in fig. 5, a plurality of equally spaced steel bar holes 9 are formed in the bottom of the steel web 3, and transverse perforated steel bars 8 are inserted into the steel bar holes 9, and the perforated steel bars 8 are embedded into the pile board foundation concrete slab 2.
In some embodiments, the thickness of the pile foundation concrete slab 2 is in the range of 35cm-65cm, and the concrete index should be no lower than C35. Because the pile foundation concrete slab 2 bears the load transferred by most of the upper structure, the pile length is designed to penetrate through the frozen soil active layer and then is about 5m more than needed, the pile foundation 1 mainly acts against horizontal load and is not allowed to fail in bending shear bearing capacity during earthquake action to cause damage.
In some embodiments, the pile foundation 1 may be a precast pile or a bored pile. Pile foundation concrete should not be numbered below C30. Pile length ranges from 8m to 12m, and the number of pile foundations and reinforcing bars can be designed according to a reaction spectrum method and a time-course analysis method in anti-seismic design.
In some embodiments, the steel web 3 should meet the strength, stability and fatigue requirements of the steel component. The steel grade should not be lower than Q345, and weather-resistant steel can be adopted to avoid repeated coating. If two or more steel webs 3 are provided, it is preferable that they are arranged at equal intervals. The height of the steel web 3 is 650mm-1100mm, the range of the thickness of the web is 20mm-36mm, and the lower part of the steel web 3 is embedded into the pile plate foundation concrete slab 2 to a certain depth. The lower end of the steel web plate 3 can be connected with the pile plate foundation concrete slab 2 in a form of an opening plate and a reinforcing steel bar penetrating through the opening plate.
In some embodiments, the connection structure of the steel web 3 and the lower concrete slab is prefabricated in a factory, and the lower concrete slab can be divided along the running direction according to the transportation condition. And after being transported to the site, the materials are spliced into a whole by adopting a wet joint mode. The steel web 3 is recommended to be bolted and spliced by adopting high-strength bolts on site, and can also be connected by adopting welding, so that the quality of butt welding seams is ensured.
In some embodiments, the steel web 3 is welded to the flange plate 6 above, which flange plate 6 functions to support the roadway plate. The thickness of the flange plate 6 is 20mm-24mm, and the width is 480mm-500mm. A cluster of welding nails is arranged on the flange plate 6 at a distance of 1m, the number of welding nails is 9-16, and the welding nails are 150mm apart. The gang nail corresponds to the mounting holes reserved on the roadway board. And after the roadway plate is installed in place, concrete is poured, so that the roadway plate is reliably connected with the flange plate 6.
In some embodiments, the precast concrete deck 4 has a thickness of 26cm-40cm, and the concrete label should not be lower than C40. The roadway board is assembled on site by adopting prefabricated components, and the roadway board splicing construction can be performed by adopting a spliced railcar. The lane plates are connected by wet joints. And finally paving asphalt concrete pavement on the concrete pavement slab, and completing other auxiliary projects.
The line adopts a framing design scheme to reduce the foundation scale of the pile plate, and the integral roadbed design can also adopt the technical scheme.
The construction method of the highway reinforced concrete combined structure roadbed in the frozen soil area comprises the following steps:
Step 1: prefabricating the steel web 3, the flange plates 6 and the vertical stiffening ribs 7, assembling and welding to form a steel member;
step 2: the lower part of the assembled steel member is accurately positioned above the pile plate foundation concrete slab 2 by the block precast pile plate foundation concrete slab 2. The steel member is effectively connected with the pile board foundation concrete slab 2 through the steel bar holes 9 and the perforated steel bars 8 at the bottom of the steel web plate 3. The pile plate foundation concrete slab 2 reserves a reinforcing steel bar joint at the block position;
step 3: constructing a pile board foundation pile foundation 1, breaking a pile head and reserving pile foundation reinforcement binding joints;
step 4: the combined member of the steel member and the pile plate foundation concrete slab 2 is transported to the site and is installed at the top of the pile plate foundation pile foundation 1, the steel web is firstly temporarily bolted, the pile plate foundation pile foundation 1 and the pile plate foundation concrete slab 2 are bound into a whole through reserved connecting steel bars, and the pile plate foundation pile foundation 1 and the pile plate foundation concrete slab 2 are connected into a whole after a joint is poured;
Step 5: the vertical through holes are preset in the position of the protruding support 13 of the precast concrete pavement slab 4, the shear nails 10 are installed at the top of the flange slab 6, the precast concrete pavement slab 4 is transported to the site and installed at the top of the steel web 3, and the shear nails 10 are inserted into the vertical through holes of the precast concrete pavement slab 4 and are connected in a pouring mode. Finally, pavement, railing, drainage and other auxiliary facilities are completed.
In one embodiment, the steel-concrete combined structure roadbed is arranged in sections in the running direction, and structural gaps are arranged between the structures. The prefabricated concrete traffic lane board 4 is provided with an expansion joint device at the position of the structural joint, so that smooth running is ensured. The steel web 3 is not connected with the pile foundation concrete slab 2 at the position of the structural joint. The planar dimensions of the pile foundation slab 2 should be matched to the design width of the precast concrete deck 4.
The steel webs 3 are provided with at least two, in some embodiments, a plurality of transverse connecting beams 5 provided with manholes 12 are installed between the adjacent steel webs 3, and the transverse two ends of the transverse connecting beams 5 are connected with the vertical stiffening ribs 7 through the gusset plates 11 and the anchor bolts. In some embodiments, a plurality of transverse through reinforcing steel bar holes 9 are reserved at the bottom of the steel web plate 3, transverse perforated reinforcing steel bars 8 are inserted into the reinforcing steel bar holes 9, and when the pile plate foundation concrete slab 2 is prefabricated, the perforated reinforcing steel bars 8 are buried into the pile plate foundation concrete slab 2.
Embodiment one:
The embodiment provides a steel-concrete combined structure for roadbed in permafrost region, which is formed by sectionally arranging the steel-concrete combined structures in the route direction, and expansion joints are arranged between adjacent structures. The longitudinal sectional length of the steel-concrete combined structure of the embodiment is 100m, and a vehicle passing mode is considered by adopting a framing design.
As shown in fig. 1, the steel-concrete combined structure roadbed comprises a pile plate foundation, 4 steel webs 3 in a single frame and precast concrete pavement slabs 4, wherein the pile plate foundation comprises a pile plate foundation pile foundation 1 and a pile plate foundation concrete slab 2. Considering that lateral instability of the steel web 3 may occur, a transverse contact beam 5 is provided. The flange plate 6 is welded on the upper side of the steel web plate 3, the precast concrete roadway plate 4 and the flange plate 6 are connected by adopting shear pin clusters, and a connection mode is realized by post-pouring concrete in the reserved mounting holes.
In the embodiment, the pile length of the pile plate foundation pile foundation 1 is 10m, and the pile plate foundation pile foundation 1 mainly plays a role in resisting horizontal load. The pile board foundation pile foundation 1 adopts a bored pile. The concrete grade of the pile board foundation pile foundation 1 adopts C30. The distance between the pile plate foundation pile foundations 1 in the vertical driving direction is 3.5m, and the diameter of the pile plate foundation pile foundations 1 is 1.2m. The distance between the pile plate foundation piles 1 in the running direction is 9.5m, and the distance between the pile plate foundation centers at the end parts and the end parts of the concrete plates 2 is 2.5m. A total of 33 pile foundations 1 are in each segmented structure.
In this embodiment, the pile foundation concrete slab 2 of the pile foundation has a planar dimension of 11.2m×100m, the pile foundation concrete slab 2 has a thickness of 0.45m, and the pile foundation concrete slab 2 has a concrete grade of C35. Considering the size limitation of the pile foundation concrete slab 2 during transportation, the sectional length of the pile foundation concrete slab 2 in the traveling direction is 9m, and the vertical traveling direction sectional position is the center line position of the pile foundation 1. And after being transported to the site, the materials are spliced by adopting a wet seaming mode.
In this embodiment, the steel web 3 is rated Q345, and the height of the steel web 3 is changed to 800mm-1004mm in consideration of 2% transverse gradient, and the thickness of the steel web 3 is 24mm. The steel web 3 stretches into the lower pile plate foundation concrete slab 2 for 20cm, and the lower end of the steel web 3 is connected with the plate foundation concrete slab 2 in a construction mode that an opening plate penetrates through steel bars, as shown in fig. 5.
In this embodiment, the steel web 3 is provided with vertical stiffening ribs 7. And transverse connecting beams 5 are arranged between the steel webs 3, and the distance between the transverse connecting beams 5 is 9.5m and corresponds to the position of the pile foundation 1 of the pile plate foundation. The transverse connecting beam 5 and the vertical stiffening rib 7 are bolted by adopting high-strength bolts. The transverse connecting beam 5 is provided with a manhole, and the minimum size of the manhole is 600 multiplied by 800mm.
In the embodiment, the flange plate 6 is welded on the upper side of the steel web 3, the width of the flange plate 6 is 500mm, the thickness of the flange plate 6 is 20mm, a cluster of welding nail groups are arranged on the flange plate 6 at intervals of 1m, the number of welding nails is 12, and the welding nail intervals are 150mm. This gang nail corresponds to the mounting holes reserved on the traffic lane plate 4. And pouring concrete after the precast concrete pavement slab 4 is installed in place in a blocking manner, so that the precast concrete pavement slab 4 is reliably connected with the flange slab 6.
In the embodiment, the thickness of the concrete pavement slab 4 is 25cm, the thickness of the peduncle is 35cm, and the concrete label is C40. The preform segment length was 2.5m and the wet seam width was 0.5m.
Embodiment two:
the content of this embodiment is the same as that of the first embodiment except for a part of the content, and only the difference will be described below.
In this embodiment, an integral roadbed design scheme is adopted, and total 8 steel webs 3 are adopted. The planar dimensions of the slab foundation concrete slab 2 of the pile foundation are 24.5m×100m, and the thickness of the slab foundation concrete slab 2 is 0.45m. The pile board foundation pile foundation 1 adopts prefabricated pipe piles. A total of 77 pile foundations 1 are provided in each segmented structure.
In this embodiment, the steel web 3 is made of Q355NH grade weathering steel. The weathering steel can be subjected to surface treatment before installation, so that a compact rust layer is formed on the surface of the weathering steel.
In this embodiment, the concrete roadway board 4 has a sectional width of 2.5m along the driving direction, and the longitudinal direction also needs to be divided into 8m+9m+8m. The width of the wet joint between the longitudinal and transverse precast blocks is 0.5m.
Example III
The content of this embodiment is the same as that of the first embodiment except for a part of the content, and only the difference will be described below.
In this embodiment, the steel web 3 adopts a corrugated steel web structure, and the corrugated steel web can be perforated for ventilation and maintenance between webs, and the size of the perforated holes should meet the requirement of web stress. The corrugated steel web is provided with vertical stiffening ribs only at the section position of the pile foundation for connection with the transverse connecting beam 5.
In this embodiment, the end of the transverse connecting beam 5 may also be welded to the steel web 3, so that the quality of the butt weld needs to be ensured to meet the stress requirement of the structure.
In this embodiment, the steel web 3 is made of Q355NH grade weathering steel. The weathering steel can be subjected to surface treatment before installation, so that a compact rust layer is formed on the surface of the steel.
The foregoing description of the invention has been presented for purposes of illustration and description, and is not intended to be limiting. Several simple deductions, modifications or substitutions may also be made by a person skilled in the art to which the invention pertains, based on the idea of the invention.
Claims (10)
1. The construction method of the highway reinforced concrete combined structure roadbed in the frozen soil area is characterized by comprising the following steps of:
The method comprises the following steps:
Prefabricating a steel web (3), a flange plate (6) and a vertical stiffening rib (7), and welding the steel web, the flange plate and the vertical stiffening rib into a steel member after assembling;
Dividing precast pile plate foundation concrete plates (2), and accurately positioning the lower parts of the assembled steel members above the pile plate foundation concrete plates (2); the steel member is effectively connected with the pile plate foundation concrete slab (2) through the steel bar holes (9) and the perforated steel bars (8) at the bottom of the steel web plate (3); a reinforcing steel bar joint is reserved at the blocking position of the pile plate foundation concrete slab (2);
Constructing a pile board foundation pile foundation (1), breaking a pile head and reserving pile foundation steel bar binding joints;
The combined member formed by the steel member and the pile plate foundation concrete slab (2) is transported to the site and is mounted at the top of the pile plate foundation pile foundation (1), the steel web (3) is temporarily bolted firstly, then the pile plate foundation pile foundation (1) and the pile plate foundation concrete slab (2) are bound into a whole through reserved connecting reinforcements, and the pile plate foundation pile foundation concrete slab and the pile plate foundation concrete slab are connected into a whole after a joint is poured.
2. The construction method of the expressway reinforced concrete combined structure roadbed in the frozen soil area according to claim 1, which is characterized by comprising the following steps:
The steel web (3) is provided with at least two, a plurality of transverse connecting beams (5) provided with manholes (12) are arranged between the adjacent steel webs (3), and the transverse two ends of each transverse connecting beam (5) are connected with the vertical stiffening ribs (7) through the gusset plates (11) and the anchor bolts.
3. The construction method of the expressway reinforced concrete combined structure roadbed in the frozen soil area according to claim 2, which is characterized by comprising the following steps:
Vertical through holes are preset in the position of a protruding support (13) of the precast concrete pavement slab (4), shear nails (10) are installed at the top of the flange slab (6), the precast concrete pavement slab (4) is transported to the site and installed at the top of the steel web (3), and the shear nails (10) are inserted into the vertical through holes of the precast concrete pavement slab (4) to be connected in a pouring mode.
4. A frozen soil zone highway reinforced concrete composite structure subgrade constructed by the method of claim 3, wherein:
the roadbed comprises a pile board foundation pile foundation (1), a pile board foundation concrete slab (2), a steel web (3) and a precast concrete pavement slab (4);
The pile board foundation pile foundation (1) is vertically arranged; the pile plate foundation concrete slab (2) is horizontally arranged above the pile plate foundation pile foundation (1); the steel webs (3) are vertically arranged at the top of the pile plate foundation concrete slab (2) and are longitudinally arranged at least two, and the bottoms of the steel webs (3) are inserted into the pile plate foundation concrete slab (2); the precast concrete traffic lane board (4) is horizontally arranged at the top of the steel web plate (3).
5. The frozen soil area highway reinforced concrete composite structure roadbed according to claim 4, wherein:
The bottom of the steel web plate (3) is provided with a plurality of steel bar holes (9), transverse perforated steel bars (8) are inserted into the steel bar holes (9), and the perforated steel bars (8) are buried into the pile plate foundation concrete slab (2).
6. The frozen soil area highway reinforced concrete composite structure roadbed according to claim 5, wherein:
the top of the steel web plate (3) is provided with a horizontal flange plate (6), the top surface of the flange plate (6) is provided with a shear nail (10), and the shear nail (10) is embedded into the precast concrete pavement slab (4).
7. The frozen soil area highway reinforced concrete composite structure roadbed according to claim 6, wherein:
Two sides of the steel web plate (3) are provided with vertical stiffening ribs (7), and the vertical stiffening ribs (7) are perpendicular to the steel web plate (3).
8. The frozen soil area highway reinforced concrete composite structure subgrade according to claim 7, wherein:
A plurality of transverse connecting beams (5) are arranged between the adjacent steel webs (3), and the transverse connecting beams (5) are vertically arranged and provided with manholes (12);
The transverse two ends of the transverse connecting beam (5) are connected with the vertical stiffening ribs (7) through the gusset plates (11) and the anchor bolts.
9. The frozen soil area highway reinforced concrete composite structure subgrade according to claim 8, wherein:
the precast concrete traffic lane board (4) bottom surface is provided with protruding bearing (13) corresponding to the position of steel web (3), protruding bearing (13) longitudinal arrangement, and shear pin (10) are located protruding bearing (13).
10. The frozen soil area highway reinforced concrete composite structure subgrade according to claim 9, wherein:
the steel web (3) is a corrugated steel plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211004863.7A CN115491940B (en) | 2022-08-22 | 2022-08-22 | Highway steel-concrete combined structure roadbed in frozen soil area and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211004863.7A CN115491940B (en) | 2022-08-22 | 2022-08-22 | Highway steel-concrete combined structure roadbed in frozen soil area and construction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115491940A CN115491940A (en) | 2022-12-20 |
| CN115491940B true CN115491940B (en) | 2024-04-30 |
Family
ID=84466405
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211004863.7A Active CN115491940B (en) | 2022-08-22 | 2022-08-22 | Highway steel-concrete combined structure roadbed in frozen soil area and construction method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115491940B (en) |
Citations (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5255996A (en) * | 1990-12-27 | 1993-10-26 | Kiat Ong S | Method of constructing a roadway |
| JPH09221717A (en) * | 1996-02-20 | 1997-08-26 | Kawasaki Steel Corp | Steel-concrete composite floor-slab bridge and construction method thereof |
| CA2503181A1 (en) * | 2004-04-19 | 2005-10-19 | Woon T. Cheung | System for supporting and leveling paving stones |
| JP2011168956A (en) * | 2010-02-16 | 2011-09-01 | Miho Kitagawa | Construction structure and construction method of road |
| CN203128995U (en) * | 2013-02-25 | 2013-08-14 | 同济大学 | Combined T-girder component and combined T-girder bridge |
| CN103321118A (en) * | 2013-07-09 | 2013-09-25 | 中铁第四勘察设计院集团有限公司 | Bridge road transition section roadbed structure of deep layer yielding ground regions |
| CN103821079A (en) * | 2014-03-14 | 2014-05-28 | 湖南大学 | Combined box girder sea-crossing bridge and construction method thereof |
| CN207073046U (en) * | 2017-07-05 | 2018-03-06 | 安徽省交通规划设计研究总院股份有限公司 | A kind of newly-built peg board formula roadbed of the chainless drives formula structural system with bent cap |
| CN208219324U (en) * | 2018-05-11 | 2018-12-11 | 中铁二院工程集团有限责任公司 | A kind of box road structure of high-speed railway cast-in-situ bored pile |
| CN109653049A (en) * | 2018-12-18 | 2019-04-19 | 中铁十五局集团第工程有限公司 | The construction method in approach fill section in a kind of soft ground treatment |
| CN110106758A (en) * | 2019-04-15 | 2019-08-09 | 湖北省交通规划设计院股份有限公司 | A kind of prestress type EPS roadbed widening structure and construction method |
| CN110258221A (en) * | 2019-06-24 | 2019-09-20 | 中铁第四勘察设计院集团有限公司 | A kind of box frame roadbed |
| CN209537959U (en) * | 2018-08-21 | 2019-10-25 | 宁波交通工程建设集团有限公司 | Traffic loading vibration-proof structure |
| CN111733689A (en) * | 2020-07-31 | 2020-10-02 | 福州大学 | Novel large-span integral abutment rear packing device and construction method thereof |
| CN112211088A (en) * | 2020-11-01 | 2021-01-12 | 中铁二院昆明勘察设计研究院有限责任公司 | Single-span integral seamless bridge structure adopting steel box combination beam and construction method |
| CN213358184U (en) * | 2020-08-07 | 2021-06-04 | 上海通正铝结构建设科技有限公司 | Roadbed box for large crawler crane |
| CN112900228A (en) * | 2021-03-10 | 2021-06-04 | 山西省交通规划勘察设计院有限公司 | Non-prestressed T-shaped beam with corrugated steel web |
| CN214561747U (en) * | 2021-01-26 | 2021-11-02 | 中铁十七局集团第四工程有限公司 | Adjustable steel-concrete combined pedestal for prefabricated T-beam |
| CN115680005A (en) * | 2022-10-09 | 2023-02-03 | 中交第一公路勘察设计研究院有限公司 | Assembled overhead structure of highway in high-intensity permafrost region and construction method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8938836B2 (en) * | 2012-09-25 | 2015-01-27 | Pbc International Inc. | Abutment structures |
-
2022
- 2022-08-22 CN CN202211004863.7A patent/CN115491940B/en active Active
Patent Citations (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5255996A (en) * | 1990-12-27 | 1993-10-26 | Kiat Ong S | Method of constructing a roadway |
| JPH09221717A (en) * | 1996-02-20 | 1997-08-26 | Kawasaki Steel Corp | Steel-concrete composite floor-slab bridge and construction method thereof |
| CA2503181A1 (en) * | 2004-04-19 | 2005-10-19 | Woon T. Cheung | System for supporting and leveling paving stones |
| JP2011168956A (en) * | 2010-02-16 | 2011-09-01 | Miho Kitagawa | Construction structure and construction method of road |
| CN203128995U (en) * | 2013-02-25 | 2013-08-14 | 同济大学 | Combined T-girder component and combined T-girder bridge |
| CN103321118A (en) * | 2013-07-09 | 2013-09-25 | 中铁第四勘察设计院集团有限公司 | Bridge road transition section roadbed structure of deep layer yielding ground regions |
| CN103821079A (en) * | 2014-03-14 | 2014-05-28 | 湖南大学 | Combined box girder sea-crossing bridge and construction method thereof |
| CN207073046U (en) * | 2017-07-05 | 2018-03-06 | 安徽省交通规划设计研究总院股份有限公司 | A kind of newly-built peg board formula roadbed of the chainless drives formula structural system with bent cap |
| CN208219324U (en) * | 2018-05-11 | 2018-12-11 | 中铁二院工程集团有限责任公司 | A kind of box road structure of high-speed railway cast-in-situ bored pile |
| CN209537959U (en) * | 2018-08-21 | 2019-10-25 | 宁波交通工程建设集团有限公司 | Traffic loading vibration-proof structure |
| CN109653049A (en) * | 2018-12-18 | 2019-04-19 | 中铁十五局集团第工程有限公司 | The construction method in approach fill section in a kind of soft ground treatment |
| CN110106758A (en) * | 2019-04-15 | 2019-08-09 | 湖北省交通规划设计院股份有限公司 | A kind of prestress type EPS roadbed widening structure and construction method |
| CN110258221A (en) * | 2019-06-24 | 2019-09-20 | 中铁第四勘察设计院集团有限公司 | A kind of box frame roadbed |
| CN111733689A (en) * | 2020-07-31 | 2020-10-02 | 福州大学 | Novel large-span integral abutment rear packing device and construction method thereof |
| CN213358184U (en) * | 2020-08-07 | 2021-06-04 | 上海通正铝结构建设科技有限公司 | Roadbed box for large crawler crane |
| CN112211088A (en) * | 2020-11-01 | 2021-01-12 | 中铁二院昆明勘察设计研究院有限责任公司 | Single-span integral seamless bridge structure adopting steel box combination beam and construction method |
| CN214561747U (en) * | 2021-01-26 | 2021-11-02 | 中铁十七局集团第四工程有限公司 | Adjustable steel-concrete combined pedestal for prefabricated T-beam |
| CN112900228A (en) * | 2021-03-10 | 2021-06-04 | 山西省交通规划勘察设计院有限公司 | Non-prestressed T-shaped beam with corrugated steel web |
| CN115680005A (en) * | 2022-10-09 | 2023-02-03 | 中交第一公路勘察设计研究院有限公司 | Assembled overhead structure of highway in high-intensity permafrost region and construction method |
Non-Patent Citations (2)
| Title |
|---|
| 孙伟 ; 齐琳 ; .横穿高寒的绿色公路.中国公路.2018,(第15期),全文. * |
| 横穿高寒的绿色公路;孙伟;齐琳;;中国公路;20180801(第15期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115491940A (en) | 2022-12-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104929034B (en) | A kind of modularization steel reinforced concrete rapid construction small box girder bridge and its construction method | |
| CN110512647B (en) | Partial assembly type subway station structure design and construction method | |
| CN107268366B (en) | Assembled wallboard and pile plate combined soilless roadbed | |
| CN110582609B (en) | Construction system and method for combined U-shaped reinforcing beam bridge floor | |
| CN109853375B (en) | Bridge expansion joint reserved notch of assembled structure and construction method thereof | |
| CN115680005A (en) | Assembled overhead structure of highway in high-intensity permafrost region and construction method | |
| CN112900255A (en) | Novel bridge deck continuous seam crossing plate structure and construction method thereof | |
| CN106436591A (en) | Steel cantilever combined bridge deck slab widening and reconstruction structure and construction method thereof | |
| CN110042770A (en) | A method of using the original bridge of external prestressing steel Shu Tuokuan in length and breadth | |
| CN115491940B (en) | Highway steel-concrete combined structure roadbed in frozen soil area and construction method | |
| KR100510092B1 (en) | A one-piece type arch-shaped structure with the precast concrete pannel and the steel frame under the earth, and method for manufacturing it | |
| CN111472253A (en) | Cable-stayed bridge of steel truss stiffened concrete beam | |
| CN113585284A (en) | Steel-concrete composite beam and temporary pavement covering structure for subway station | |
| JP2003003420A (en) | Supporting member for prefabricated bridge | |
| JP3854545B2 (en) | Box-type transportation | |
| CN113272496B (en) | Construction system for double-U-shaped and single-U-shaped reinforced concrete combined structure of bridge | |
| JP3956292B2 (en) | Road embankment structure, road embankment method, multilevel road and construction method thereof | |
| CN212925727U (en) | Cable-stayed bridge of steel truss stiffened concrete beam | |
| CN216894413U (en) | Single-hole bridge and tunnel co-construction structure | |
| CN217781699U (en) | River-crossing steel structure bridge | |
| CN111535104B (en) | Road structure around foundation pit support and construction method thereof | |
| CN215252255U (en) | Pile-beam integrated fully-prefabricated assembled bridge substructure and bridge | |
| CN220246638U (en) | Porous flood bridge | |
| CN219080370U (en) | Railway roadbed slope protection pile top arched crown beam and combined Liang Zhuang slope protection system | |
| CN215977292U (en) | Steel-concrete composite beam and temporary pavement covering structure for subway station |
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 |