CN114059414A - Overhead superposed type tunnel structure suitable for frozen soil area and construction method - Google Patents
Overhead superposed type tunnel structure suitable for frozen soil area and construction method Download PDFInfo
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- 239000002689 soil Substances 0.000 title claims abstract description 88
- 238000010276 construction Methods 0.000 title claims abstract description 34
- 239000002344 surface layer Substances 0.000 claims abstract description 54
- 239000002131 composite material Substances 0.000 claims description 68
- 239000010410 layer Substances 0.000 claims description 67
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 20
- 229910000831 Steel Inorganic materials 0.000 claims description 17
- 230000000903 blocking effect Effects 0.000 claims description 17
- 238000005266 casting Methods 0.000 claims description 17
- 239000010959 steel Substances 0.000 claims description 17
- 238000012423 maintenance Methods 0.000 claims description 11
- 241000272165 Charadriidae Species 0.000 claims description 2
- 238000004891 communication Methods 0.000 claims 1
- 230000000149 penetrating effect Effects 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 4
- 239000011449 brick Substances 0.000 description 5
- 239000004575 stone Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010257 thawing Methods 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 238000009435 building construction Methods 0.000 description 1
- 239000013590 bulk material Substances 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C9/00—Special pavings; Pavings for special parts of roads or airfields
- E01C9/002—Coverings, the surface of which consists partly of prefabricated units and partly of sections made in situ
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/52—Apparatus for laying individual preformed surfacing elements, e.g. kerbstones
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
- E01C23/03—Arrangements for curing paving; Devices for applying curing means; Devices for laying prefabricated underlay, e.g. sheets, membranes; Protecting paving under construction or while curing, e.g. use of tents
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C7/00—Coherent pavings made in situ
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Abstract
The invention discloses an overhead superposed type tunnel structure suitable for a frozen soil area, which comprises pile foundations, wherein a plurality of pile foundations are arranged, a bearing platform beam is arranged at the top of each pile foundation, a post-cast strip is arranged at the top of each bearing platform beam, a prefabricated laminated slab is arranged between two adjacent post-cast strips, and cast-in-place surface layers are arranged on the upper surfaces of the post-cast strips and the prefabricated laminated slab; meanwhile, a construction method suitable for the overhead superposed type tunnel structure in the frozen soil area is also disclosed. The method is based on the combination of protecting permafrost, controlling the uneven settlement of the field way and protecting the ecological environment of plateau alpine regions, and can simultaneously meet the requirements of quick construction and quick replacement in wartime.
Description
Technical Field
The invention relates to an overhead superposed type tunnel structure suitable for a frozen soil area and a construction method, and belongs to the technical field of building construction.
Background
Along with the increasing of the construction of airports in China, according to the medium-long term planning of the airport construction in China, the airport construction is carried out successively in plateau high and cold areas in the future, most of the areas are located in frozen soil areas, the thawing and sinking of the frozen soil occur frequently after the degradation of the frozen soil for many years, and the frozen soil layer in seasons has the phenomena of frost heaving, thawing and deformation along with the change of seasons, so that the airport runway surface structure is cracked, broken and the like; the ecological environment of the plateau alpine region is fragile, the bulk materials such as broken stones are scarce, the manual and mechanical effects are low, and the like, so that the problem of building airports in frozen soil regions becomes more important to solve.
Most of the field road surface at the present stage adopts a cast-in-place concrete structure, the foundation treatment adopts methods of dynamic compaction, replacement and filling, composite foundation and the like, the influence on the ecological environment is large, the requirements on massive materials, crushed stone and the like are large, and the construction period is long, so that the traditional airport field road construction scheme can not meet the requirements of plateau alpine regions. The method has the advantages of controlling the settlement of the field, protecting the ecological environment, reducing the use of bulk materials such as broken stones and the like, shortening the construction period and becoming a problem which needs to be solved urgently by technical personnel in the field.
Disclosure of Invention
The invention aims to provide an overhead superposed type tunnel structure suitable for a frozen soil area and a construction method of the overhead superposed type tunnel structure suitable for the frozen soil area.
In order to solve the technical problems, the invention adopts the following technical scheme: a built-on superposed type tunnel structure suitable for a frozen soil area comprises pile foundations, wherein a plurality of pile foundations are arranged, a bearing platform beam is arranged at the top of each pile foundation, a post-cast strip is arranged at the top of each bearing platform beam, a prefabricated laminated slab is arranged between every two adjacent post-cast strips, and cast-in-place surface layers are arranged on the upper surfaces of the post-cast strips and the prefabricated laminated slab; based on the protection of permafrost, the uneven settlement of a field way is controlled, the ecological environment of a plateau alpine region is protected, and the requirements of quick construction and quick replacement in wartime can be met.
According to the overhead superposed type tunnel structure suitable for the frozen soil area, the pile foundation is provided with the cushion layer, the pile foundation penetrates through the cushion layer, and the upper surface of the cushion layer is connected with the lower surface of the bearing platform beam; the bed course sets up the upper surface at the pile foundation, conveniently makes level, provides smooth surface for the construction of cushion cap roof beam, makes things convenient for the construction of cushion cap roof beam.
In the overhead superposed type tunnel structure suitable for the frozen soil area, an end part plugging structure is arranged between two adjacent bearing platform beams; when the overhead height between the field of the frozen soil area and the prefabricated composite slab is more than 0.5m, the end plugging structure isolates external heat in summer, ventilation equipment can be arranged on the end plugging structure, and ventilation is opened in winter; when the overhead height between the field of the frozen soil area and the prefabricated composite slab is less than 0.5m, the end part plugging structure can be cancelled, and the permafrost is protected.
According to the overhead superposed type field way structure suitable for the frozen soil area, a splicing seam is arranged between two adjacent prefabricated superposed plates; the concatenation seam can leave the leeway for the expend with heat and contract with cold condition of prefabricated superimposed sheet, can also be when discontinuous polylith prefabricated superimposed sheet damages, and the fixed point is maintained and is changed, resumes the road surface fast.
According to the overhead superposed type tunnel structure suitable for the frozen soil area, reinforcing steel bars are uniformly distributed inside the bearing platform beam, the post-cast strip, the prefabricated superposed slab and the cast-in-place surface layer; the prefabricated composite slab adopts a factory prefabrication mode, the thickness, the reinforcing bars and the like are determined according to the actual span and the load, the application range is wide, and the construction is accelerated by adopting a composite slab structure, so that the building of templates can be reduced; meanwhile, the laminated slab can be processed in a factory at a different place, the construction and maintenance quality is guaranteed, the laminated slab can be prefabricated in advance for later use by adopting an overhead laminated slab form, and when the pavement slab is damaged, the laminated slab is hoisted and replaced in time, so that the pavement can be quickly recovered.
The pile foundation adopts a precast tubular pile or a cast-in-place pile, and the bearing platform beam adopts a steel bar structure or a steel structure beam.
The end part plugging structure is suitable for the overhead superposed type field way structure in the frozen soil area, and a brick laying mode or a plugging plate mode is adopted.
A construction method suitable for an overhead superposed type tunnel structure in a frozen soil area comprises the following steps:
s1, leveling the field: carrying out leveling treatment on the field of the frozen soil area;
s2, pile foundation construction: submerging all the pile foundations into a field of a frozen soil area;
s3, casting a cushion layer: pouring a cushion layer on the upper part of the pile foundation;
s4, constructing a bearing platform beam: installing a bearing platform beam on the pile foundation, wherein the top end of the pile foundation is immersed in the bearing platform beam, and the lower surface of the bearing platform beam is connected with the upper surface of the cushion layer;
s5, hoisting the prefabricated laminated slab on site: placing the prefabricated composite slab between two adjacent bearing platform beams, and connecting two sides of the prefabricated composite slab with the bearing platform beams;
s6, casting a post-cast strip: pouring post-cast strips on two adjacent prefabricated composite slabs, and connecting the two adjacent prefabricated composite slabs through the post-cast strips to enable the lower surfaces of the post-cast strips to be connected with the bearing platform beam;
s7, casting a cast-in-place surface layer: binding steel bars in the cast-in-place surface layer, and pouring the cast-in-place surface layer on the upper surfaces of the post-cast strip and the prefabricated composite slab;
s8, maintenance: maintaining the field structure;
s9, building an end plugging structure: and an end part plugging structure is built between two adjacent bearing platform beams.
In the foregoing construction method for an overhead superposed type tunnel structure in a frozen soil area, in step S9, when in winter, the end blocking structure is removed; and when the building is in summer, building the end plugging structure again.
In the above construction method for the overhead superposed type tunnel structure in the frozen soil area, in the step S9, when the overhead height between the field in the frozen soil area and the prefabricated composite slab is less than 0.4 to 0.6m, the end blocking structure needs to be cancelled, and the distance between the lower surface of the end blocking structure and the field in the frozen soil area is greater than or equal to 80m, so that the frozen soil can be protected for many years.
Compared with the prior art, the invention has the advantages that:
1. the invention adopts the pile foundation to control the uneven settlement caused by the degradation of permafrost, reduces the use of broken stones and the like, and can solve the problem of bulk material shortage in alpine regions in plateaus;
2. the invention adopts a pile foundation overhead road surface structure form, can protect permafrost and remove the plugs around the field in winter; the plugging can be used in summer, so that the effect of protecting frozen soil for many years can be achieved;
3. the invention has the advantages that the stone is in shortage in alpine regions in the plateau, the ecological environment is fragile, and the construction is accelerated by adopting a laminated slab structure, so that the building of templates can be reduced; meanwhile, the laminated slab can be processed in a factory at different places, and the construction and maintenance quality is guaranteed;
4. the invention adopts the overhead laminated slab form, can be prefabricated for standby in advance, can be hoisted and replaced in time when the pavement slab is damaged, can quickly recover the pavement, improves the efficiency of maintenance and replacement, and reduces the overall cost;
5. the invention can be arranged in multiple groups, and the number of the groups of the invention is increased according to the size of the field, so that the invention has wide application range.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a transverse elevation view of the present invention;
FIG. 3 is a longitudinal elevational view of the present invention;
FIG. 4 is an enlarged view of A in FIG. 1;
FIG. 5 is an enlarged view of B in FIG. 2;
FIG. 6 is an enlarged view of C in FIG. 3;
FIG. 7 is a schematic view showing the construction of a prefabricated laminate panel according to the present invention;
FIG. 8 is a schematic view of the construction of the splice seam of the present invention;
FIG. 9 is a schematic view showing the arrangement of reinforcing bars between the post-cast strip, the prefabricated composite slab and the cast-in-place surface layer according to the present invention;
fig. 10 is a schematic view showing arrangement of reinforcing bars among a cap beam, a post-cast strip, a prefabricated laminate slab and a cast-in-place surface layer according to the present invention.
Reference numerals: the method comprises the following steps of 1-pile foundation, 2-bearing platform beam, 3-post-cast strip, 4-prefabricated laminated slab, 5-cast-in-place surface layer, 6-cushion layer, 7-end part plugging structure, 8-splicing seam and 9-reinforcing steel bar.
The invention is further described with reference to the following figures and detailed description.
Detailed Description
Example 1 of the invention: the utility model provides a be applicable to built on stilts superimposed type field way structure in frozen soil district, includes pile foundation 1, pile foundation 1 is provided with many, and every pile foundation 1's top is provided with cushion cap roof beam 2, the top of cushion cap roof beam 2 is provided with post-cast strip 3, be provided with prefabricated superimposed sheet 4 between two adjacent post-cast strips 3, post-cast strip 3 and prefabricated superimposed sheet 4's upper surface are provided with cast-in-place surface course 5.
Example 2 of the invention: a built-on superposed type tunnel structure suitable for a frozen soil area comprises pile foundations 1, wherein a plurality of pile foundations 1 are arranged, a bearing platform beam 2 is arranged at the top of each pile foundation 1, a post-cast strip 3 is arranged at the top of each bearing platform beam 2, a prefabricated laminated slab 4 is arranged between every two adjacent post-cast strips 3, and cast-in-place surface layers 5 are arranged on the upper surfaces of the post-cast strips 3 and the prefabricated laminated slab 4; be provided with bed course 6 on the pile foundation 1, pile foundation 1 wears to locate bed course 6, the upper surface of bed course 6 is connected with the lower surface of cushion cap roof beam 2.
Example 3 of the invention: a built-on superposed type tunnel structure suitable for a frozen soil area comprises pile foundations 1, wherein a plurality of pile foundations 1 are arranged, a bearing platform beam 2 is arranged at the top of each pile foundation 1, a post-cast strip 3 is arranged at the top of each bearing platform beam 2, a prefabricated laminated slab 4 is arranged between every two adjacent post-cast strips 3, and cast-in-place surface layers 5 are arranged on the upper surfaces of the post-cast strips 3 and the prefabricated laminated slab 4; the pile foundation 1 is provided with a cushion layer 6, the pile foundation 1 penetrates through the cushion layer 6, and the upper surface of the cushion layer 6 is connected with the lower surface of the bearing platform beam 2; an end part plugging structure 7 is arranged between the two adjacent bearing platform beams 2.
Example 4 of the invention: a built-on superposed type tunnel structure suitable for a frozen soil area comprises pile foundations 1, wherein a plurality of pile foundations 1 are arranged, a bearing platform beam 2 is arranged at the top of each pile foundation 1, a post-cast strip 3 is arranged at the top of each bearing platform beam 2, a prefabricated laminated slab 4 is arranged between every two adjacent post-cast strips 3, and cast-in-place surface layers 5 are arranged on the upper surfaces of the post-cast strips 3 and the prefabricated laminated slab 4; the pile foundation 1 is provided with a cushion layer 6, the pile foundation 1 penetrates through the cushion layer 6, and the upper surface of the cushion layer 6 is connected with the lower surface of the bearing platform beam 2; an end part plugging structure 7 is arranged between two adjacent bearing platform beams 2; and a splicing seam 8 is arranged between two adjacent prefabricated composite slabs 4.
Example 5 of the invention: a built-on superposed type tunnel structure suitable for a frozen soil area comprises pile foundations 1, wherein a plurality of pile foundations 1 are arranged, a bearing platform beam 2 is arranged at the top of each pile foundation 1, a post-cast strip 3 is arranged at the top of each bearing platform beam 2, a prefabricated laminated slab 4 is arranged between every two adjacent post-cast strips 3, and cast-in-place surface layers 5 are arranged on the upper surfaces of the post-cast strips 3 and the prefabricated laminated slab 4; the pile foundation 1 is provided with a cushion layer 6, the pile foundation 1 penetrates through the cushion layer 6, and the upper surface of the cushion layer 6 is connected with the lower surface of the bearing platform beam 2; an end part plugging structure 7 is arranged between two adjacent bearing platform beams 2; a splicing seam 8 is arranged between two adjacent prefabricated composite slabs 4; reinforcing steel bars 9 are uniformly distributed inside the bearing platform beam 2, the post-cast strip 3, the prefabricated laminated slab 4 and the cast-in-place surface layer 5.
Example 6 of the invention: a built-on superposed type tunnel structure suitable for a frozen soil area comprises pile foundations 1, wherein a plurality of pile foundations 1 are arranged, a bearing platform beam 2 is arranged at the top of each pile foundation 1, a post-cast strip 3 is arranged at the top of each bearing platform beam 2, a prefabricated laminated slab 4 is arranged between every two adjacent post-cast strips 3, and cast-in-place surface layers 5 are arranged on the upper surfaces of the post-cast strips 3 and the prefabricated laminated slab 4; the pile foundation 1 is provided with a cushion layer 6, the pile foundation 1 penetrates through the cushion layer 6, and the upper surface of the cushion layer 6 is connected with the lower surface of the bearing platform beam 2; an end part plugging structure 7 is arranged between two adjacent bearing platform beams 2; a splicing seam 8 is arranged between two adjacent prefabricated composite slabs 4; reinforcing steel bars 9 are uniformly distributed inside the bearing platform beam 2, the post-cast strip 3, the prefabricated laminated slab 4 and the cast-in-place surface layer 5; pile foundation 1 adopts precast tubular pile or bored concrete pile, cushion cap roof beam 2 adopts reinforced bar structure or steel construction roof beam.
Example 7 of the invention: a built-on superposed type tunnel structure suitable for a frozen soil area comprises pile foundations 1, wherein a plurality of pile foundations 1 are arranged, a bearing platform beam 2 is arranged at the top of each pile foundation 1, a post-cast strip 3 is arranged at the top of each bearing platform beam 2, a prefabricated laminated slab 4 is arranged between every two adjacent post-cast strips 3, and cast-in-place surface layers 5 are arranged on the upper surfaces of the post-cast strips 3 and the prefabricated laminated slab 4; the pile foundation 1 is provided with a cushion layer 6, the pile foundation 1 penetrates through the cushion layer 6, and the upper surface of the cushion layer 6 is connected with the lower surface of the bearing platform beam 2; an end part plugging structure 7 is arranged between two adjacent bearing platform beams 2; a splicing seam 8 is arranged between two adjacent prefabricated composite slabs 4; reinforcing steel bars 9 are uniformly distributed inside the bearing platform beam 2, the post-cast strip 3, the prefabricated laminated slab 4 and the cast-in-place surface layer 5; the pile foundation 1 adopts a prefabricated pipe pile or a cast-in-place pile, and the bearing platform beam 2 adopts a steel bar structure or a steel structure beam; the end part plugging structure 7 adopts a brick laying mode or a plugging plate mode.
Example 8 of the invention: a built-on superposed type tunnel structure suitable for a frozen soil area comprises pile foundations 1, wherein a plurality of pile foundations 1 are arranged, a bearing platform beam 2 is arranged at the top of each pile foundation 1, a post-cast strip 3 is arranged at the top of each bearing platform beam 2, a prefabricated laminated slab 4 is arranged between every two adjacent post-cast strips 3, and cast-in-place surface layers 5 are arranged on the upper surfaces of the post-cast strips 3 and the prefabricated laminated slab 4; the pile foundation 1 is provided with a cushion layer 6, the pile foundation 1 penetrates through the cushion layer 6, and the upper surface of the cushion layer 6 is connected with the lower surface of the bearing platform beam 2; an end part plugging structure 7 is arranged between two adjacent bearing platform beams 2; a splicing seam 8 is arranged between two adjacent prefabricated composite slabs 4; reinforcing steel bars 9 are uniformly distributed inside the bearing platform beam 2, the post-cast strip 3, the prefabricated laminated slab 4 and the cast-in-place surface layer 5; the pile foundation 1 adopts a prefabricated pipe pile or a cast-in-place pile, and the bearing platform beam 2 adopts a steel bar structure or a steel structure beam; the end part plugging structure 7 adopts a brick laying mode or a plugging plate mode.
A construction method suitable for an overhead superposed type tunnel structure in a frozen soil area comprises the following steps:
s1, leveling the field: carrying out leveling treatment on the field of the frozen soil area;
s2, constructing the pile foundation 1: submerging the whole pile foundation 1 into a field of a frozen soil area;
s3, pouring the cushion layer 6: pouring a cushion layer 6 on the upper part of the pile foundation 1;
s4, constructing the cap beam 2: installing the bearing platform beam 2 on the pile foundation 1, wherein the top end of the pile foundation 1 is submerged into the bearing platform beam 2, and the lower surface of the bearing platform beam 2 is connected with the upper surface of the cushion layer 6;
s5, hoisting the prefabricated laminated slab on site 4: placing the prefabricated composite slabs 4 between two adjacent bearing platform beams 2, and connecting two sides of each prefabricated composite slab 4 with the bearing platform beams 2;
s6, casting the post-cast strip 3: pouring a post-cast strip 3 on two adjacent prefabricated composite slabs 4, and connecting the two adjacent prefabricated composite slabs 4 through the post-cast strip 3 to ensure that the lower surface of the post-cast strip 3 is connected with the bearing platform beam 2;
s7, casting a cast-in-place surface layer 5: binding the reinforcing steel bars 9 in the cast-in-place surface layer 5, and pouring the cast-in-place surface layer 5 on the upper surfaces of the post-cast strip 3 and the prefabricated composite slab 4;
s8, maintenance: maintaining the field structure;
s9, building an end plugging structure 7: and an end plugging structure 7 is built between two adjacent bearing platform beams 2.
Example 9 of the invention: a built-on superposed type tunnel structure suitable for a frozen soil area comprises pile foundations 1, wherein a plurality of pile foundations 1 are arranged, a bearing platform beam 2 is arranged at the top of each pile foundation 1, a post-cast strip 3 is arranged at the top of each bearing platform beam 2, a prefabricated laminated slab 4 is arranged between every two adjacent post-cast strips 3, and cast-in-place surface layers 5 are arranged on the upper surfaces of the post-cast strips 3 and the prefabricated laminated slab 4; the pile foundation 1 is provided with a cushion layer 6, the pile foundation 1 penetrates through the cushion layer 6, and the upper surface of the cushion layer 6 is connected with the lower surface of the bearing platform beam 2; an end part plugging structure 7 is arranged between two adjacent bearing platform beams 2; a splicing seam 8 is arranged between two adjacent prefabricated composite slabs 4; reinforcing steel bars 9 are uniformly distributed inside the bearing platform beam 2, the post-cast strip 3, the prefabricated laminated slab 4 and the cast-in-place surface layer 5; the pile foundation 1 adopts a prefabricated pipe pile or a cast-in-place pile, and the bearing platform beam 2 adopts a steel bar structure or a steel structure beam; the end part plugging structure 7 adopts a brick laying mode or a plugging plate mode.
A construction method suitable for an overhead superposed type tunnel structure in a frozen soil area comprises the following steps:
s1, leveling the field: carrying out leveling treatment on the field of the frozen soil area;
s2, constructing the pile foundation 1: submerging the whole pile foundation 1 into a field of a frozen soil area;
s3, pouring the cushion layer 6: pouring a cushion layer 6 on the upper part of the pile foundation 1;
s4, constructing the cap beam 2: installing the bearing platform beam 2 on the pile foundation 1, wherein the top end of the pile foundation 1 is submerged into the bearing platform beam 2, and the lower surface of the bearing platform beam 2 is connected with the upper surface of the cushion layer 6;
s5, hoisting the prefabricated laminated slab on site 4: placing the prefabricated composite slabs 4 between two adjacent bearing platform beams 2, and connecting two sides of each prefabricated composite slab 4 with the bearing platform beams 2;
s6, casting the post-cast strip 3: pouring a post-cast strip 3 on two adjacent prefabricated composite slabs 4, and connecting the two adjacent prefabricated composite slabs 4 through the post-cast strip 3 to ensure that the lower surface of the post-cast strip 3 is connected with the bearing platform beam 2;
s7, casting a cast-in-place surface layer 5: binding the reinforcing steel bars 9 in the cast-in-place surface layer 5, and pouring the cast-in-place surface layer 5 on the upper surfaces of the post-cast strip 3 and the prefabricated composite slab 4;
s8, maintenance: maintaining the field structure;
s9, building an end plugging structure 7: an end part plugging structure 7 is built between two adjacent bearing platform beams 2; when in winter, the end plugging structure 7 is dismantled; when in summer, the end plugging structure 7 is built again.
Example 10 of the present invention: a built-on superposed type tunnel structure suitable for a frozen soil area comprises pile foundations 1, wherein a plurality of pile foundations 1 are arranged, a bearing platform beam 2 is arranged at the top of each pile foundation 1, a post-cast strip 3 is arranged at the top of each bearing platform beam 2, a prefabricated laminated slab 4 is arranged between every two adjacent post-cast strips 3, and cast-in-place surface layers 5 are arranged on the upper surfaces of the post-cast strips 3 and the prefabricated laminated slab 4; the pile foundation 1 is provided with a cushion layer 6, the pile foundation 1 penetrates through the cushion layer 6, and the upper surface of the cushion layer 6 is connected with the lower surface of the bearing platform beam 2; an end part plugging structure 7 is arranged between two adjacent bearing platform beams 2; a splicing seam 8 is arranged between two adjacent prefabricated composite slabs 4; reinforcing steel bars 9 are uniformly distributed inside the bearing platform beam 2, the post-cast strip 3, the prefabricated laminated slab 4 and the cast-in-place surface layer 5; the pile foundation 1 adopts a prefabricated pipe pile or a cast-in-place pile, and the bearing platform beam 2 adopts a steel bar structure or a steel structure beam; the end part plugging structure 7 adopts a brick laying mode or a plugging plate mode.
A construction method suitable for an overhead superposed type tunnel structure in a frozen soil area comprises the following steps:
s1, leveling the field: carrying out leveling treatment on the field of the frozen soil area;
s2, constructing the pile foundation 1: submerging the whole pile foundation 1 into a field of a frozen soil area;
s3, pouring the cushion layer 6: pouring a cushion layer 6 on the upper part of the pile foundation 1;
s4, constructing the cap beam 2: installing the bearing platform beam 2 on the pile foundation 1, wherein the top end of the pile foundation 1 is submerged into the bearing platform beam 2, and the lower surface of the bearing platform beam 2 is connected with the upper surface of the cushion layer 6;
s5, hoisting the prefabricated laminated slab on site 4: placing the prefabricated composite slabs 4 between two adjacent bearing platform beams 2, and connecting two sides of each prefabricated composite slab 4 with the bearing platform beams 2;
s6, casting the post-cast strip 3: pouring a post-cast strip 3 on two adjacent prefabricated composite slabs 4, and connecting the two adjacent prefabricated composite slabs 4 through the post-cast strip 3 to ensure that the lower surface of the post-cast strip 3 is connected with the bearing platform beam 2;
s7, casting a cast-in-place surface layer 5: binding the reinforcing steel bars 9 in the cast-in-place surface layer 5, and pouring the cast-in-place surface layer 5 on the upper surfaces of the post-cast strip 3 and the prefabricated composite slab 4;
s8, maintenance: maintaining the field structure;
s9, building an end plugging structure 7: an end part plugging structure 7 is built between two adjacent bearing platform beams 2; when in winter, the end plugging structure 7 is dismantled; when in summer, the end plugging structure 7 is built again; when the overhead height between the field of the frozen soil area and the prefabricated composite slab 4 is less than 0.4-0.6m, the end blocking structure 7 needs to be cancelled, and the distance between the lower surface of the end blocking structure 7 and the field of the frozen soil area is xx-xxm, so that the permafrost soil can be protected.
Example 11 of the invention: a built-on superposed type tunnel structure suitable for a frozen soil area comprises pile foundations 1, wherein 9 pile foundations 1 are arranged, a bearing platform beam 2 is arranged at the top of each pile foundation 1, a post-cast strip 3 is arranged at the top of each bearing platform beam 2, a prefabricated superposed slab 4 is arranged between every two adjacent post-cast strips 3, and cast-in-place surface layers 5 are arranged on the upper surfaces of the post-cast strips 3 and the prefabricated superposed slab 4; the pile foundation 1 is provided with a cushion layer 6, the pile foundation 1 penetrates through the cushion layer 6, and the upper surface of the cushion layer 6 is connected with the lower surface of the bearing platform beam 2; an end part plugging structure 7 is arranged between two adjacent bearing platform beams 2; a splicing seam 8 is arranged between two adjacent prefabricated composite slabs 4; reinforcing steel bars 9 are uniformly distributed inside the bearing platform beam 2, the post-cast strip 3, the prefabricated laminated slab 4 and the cast-in-place surface layer 5; the pile foundation 1 is a prefabricated pipe pile, and the bearing platform beam 2 is of a steel bar structure; the end blocking structure 7 adopts a brick-laying mode.
A construction method suitable for an overhead superposed type tunnel structure in a frozen soil area comprises the following steps:
s1, leveling the field: carrying out leveling treatment on the field of the frozen soil area;
s2, constructing the pile foundation 1: submerging the whole pile foundation 1 into a field of a frozen soil area;
s3, pouring the cushion layer 6: pouring a cushion layer 6 on the upper part of the pile foundation 1;
s4, constructing the cap beam 2: installing the bearing platform beam 2 on the pile foundation 1, wherein the top end of the pile foundation 1 is submerged into the bearing platform beam 2, and the lower surface of the bearing platform beam 2 is connected with the upper surface of the cushion layer 6;
s5, hoisting the prefabricated laminated slab on site 4: placing the prefabricated composite slabs 4 between two adjacent bearing platform beams 2, and connecting two sides of each prefabricated composite slab 4 with the bearing platform beams 2;
s6, casting the post-cast strip 3: pouring a post-cast strip 3 on two adjacent prefabricated composite slabs 4, and connecting the two adjacent prefabricated composite slabs 4 through the post-cast strip 3 to ensure that the lower surface of the post-cast strip 3 is connected with the bearing platform beam 2;
s7, casting a cast-in-place surface layer 5: binding the reinforcing steel bars 9 in the cast-in-place surface layer 5, and pouring the cast-in-place surface layer 5 on the upper surfaces of the post-cast strip 3 and the prefabricated composite slab 4;
s8, maintenance: maintaining the field structure;
s9, building an end plugging structure 7: an end part plugging structure 7 is built between two adjacent bearing platform beams 2; when in winter, the end plugging structure 7 is dismantled; when in summer, the end plugging structure 7 is built again; when the overhead height between the field of the frozen soil area and the prefabricated composite slab 4 is less than 0.4m, the end part plugging structure 7 needs to be canceled, the distance between the lower surface of the end part plugging structure 7 and the field of the frozen soil area is 80m, and the permafrost can be protected.
Example 12 of the present invention: a built-on superposed type tunnel structure suitable for a frozen soil area comprises pile foundations 1, wherein 10 pile foundations 1 are arranged, a bearing platform beam 2 is arranged at the top of each pile foundation 1, a post-cast strip 3 is arranged at the top of each bearing platform beam 2, a prefabricated superposed slab 4 is arranged between every two adjacent post-cast strips 3, and cast-in-place surface layers 5 are arranged on the upper surfaces of the post-cast strips 3 and the prefabricated superposed slab 4; the pile foundation 1 is provided with a cushion layer 6, the pile foundation 1 penetrates through the cushion layer 6, and the upper surface of the cushion layer 6 is connected with the lower surface of the bearing platform beam 2; an end part plugging structure 7 is arranged between two adjacent bearing platform beams 2; a splicing seam 8 is arranged between two adjacent prefabricated composite slabs 4; reinforcing steel bars 9 are uniformly distributed inside the bearing platform beam 2, the post-cast strip 3, the prefabricated laminated slab 4 and the cast-in-place surface layer 5; the pile foundation 1 adopts a cast-in-place pile, and the bearing platform beam 2 adopts a steel structure beam; the end blocking structure 7 adopts a blocking plate mode.
A construction method suitable for an overhead superposed type tunnel structure in a frozen soil area comprises the following steps:
s1, leveling the field: carrying out leveling treatment on the field of the frozen soil area;
s2, constructing the pile foundation 1: submerging the whole pile foundation 1 into a field of a frozen soil area;
s3, pouring the cushion layer 6: pouring a cushion layer 6 on the upper part of the pile foundation 1;
s4, constructing the cap beam 2: installing the bearing platform beam 2 on the pile foundation 1, wherein the top end of the pile foundation 1 is submerged into the bearing platform beam 2, and the lower surface of the bearing platform beam 2 is connected with the upper surface of the cushion layer 6;
s5, hoisting the prefabricated laminated slab on site 4: placing the prefabricated composite slabs 4 between two adjacent bearing platform beams 2, and connecting two sides of each prefabricated composite slab 4 with the bearing platform beams 2;
s6, casting the post-cast strip 3: pouring a post-cast strip 3 on two adjacent prefabricated composite slabs 4, and connecting the two adjacent prefabricated composite slabs 4 through the post-cast strip 3 to ensure that the lower surface of the post-cast strip 3 is connected with the bearing platform beam 2;
s7, casting a cast-in-place surface layer 5: binding the reinforcing steel bars 9 in the cast-in-place surface layer 5, and pouring the cast-in-place surface layer 5 on the upper surfaces of the post-cast strip 3 and the prefabricated composite slab 4;
s8, maintenance: maintaining the field structure;
s9, building an end plugging structure 7: an end part plugging structure 7 is built between two adjacent bearing platform beams 2; when in winter, the end plugging structure 7 is dismantled; when in summer, the end plugging structure 7 is built again; when the overhead height between the field of the frozen soil area and the prefabricated composite slab 4 is less than 0.5m, the end part plugging structure 7 needs to be canceled, the distance between the lower surface of the end part plugging structure 7 and the field of the frozen soil area is 90m, and the permafrost can be protected.
Example 13 of the invention: a built-on superposed type tunnel structure suitable for a frozen soil area comprises pile foundations 1, wherein 11 pile foundations 1 are arranged, a bearing platform beam 2 is arranged at the top of each pile foundation 1, a post-cast strip 3 is arranged at the top of each bearing platform beam 2, a prefabricated superposed slab 4 is arranged between every two adjacent post-cast strips 3, and cast-in-place surface layers 5 are arranged on the upper surfaces of the post-cast strips 3 and the prefabricated superposed slab 4; the pile foundation 1 is provided with a cushion layer 6, the pile foundation 1 penetrates through the cushion layer 6, and the upper surface of the cushion layer 6 is connected with the lower surface of the bearing platform beam 2; an end part plugging structure 7 is arranged between two adjacent bearing platform beams 2; a splicing seam 8 is arranged between two adjacent prefabricated composite slabs 4; reinforcing steel bars 9 are uniformly distributed inside the bearing platform beam 2, the post-cast strip 3, the prefabricated laminated slab 4 and the cast-in-place surface layer 5; the pile foundation 1 adopts a prefabricated pipe pile, and the cushion cap beam 2 adopts a steel structure beam; the end blocking structure 7 adopts a blocking plate mode.
A construction method suitable for an overhead superposed type tunnel structure in a frozen soil area comprises the following steps:
s1, leveling the field: carrying out leveling treatment on the field of the frozen soil area;
s2, constructing the pile foundation 1: submerging the whole pile foundation 1 into a field of a frozen soil area;
s3, pouring the cushion layer 6: pouring a cushion layer 6 on the upper part of the pile foundation 1;
s4, constructing the cap beam 2: installing the bearing platform beam 2 on the pile foundation 1, wherein the top end of the pile foundation 1 is submerged into the bearing platform beam 2, and the lower surface of the bearing platform beam 2 is connected with the upper surface of the cushion layer 6;
s5, hoisting the prefabricated laminated slab on site 4: placing the prefabricated composite slabs 4 between two adjacent bearing platform beams 2, and connecting two sides of each prefabricated composite slab 4 with the bearing platform beams 2;
s6, casting the post-cast strip 3: pouring a post-cast strip 3 on two adjacent prefabricated composite slabs 4, and connecting the two adjacent prefabricated composite slabs 4 through the post-cast strip 3 to ensure that the lower surface of the post-cast strip 3 is connected with the bearing platform beam 2;
s7, casting a cast-in-place surface layer 5: binding the reinforcing steel bars 9 in the cast-in-place surface layer 5, and pouring the cast-in-place surface layer 5 on the upper surfaces of the post-cast strip 3 and the prefabricated composite slab 4;
s8, maintenance: maintaining the field structure;
s9, building an end plugging structure 7: an end part plugging structure 7 is built between two adjacent bearing platform beams 2; when in winter, the end plugging structure 7 is dismantled; when in summer, the end plugging structure 7 is built again; when the overhead height between the field of the frozen soil area and the prefabricated composite slab 4 is less than 0.6m, the end part plugging structure 7 needs to be canceled, the distance between the lower surface of the end part plugging structure 7 and the field of the frozen soil area is 100m, and the permafrost can be protected.
The working principle of one embodiment of the invention is as follows: after the field of the frozen soil area is leveled, completely submerging the pile foundation 1 into the field of the frozen soil area, and pouring a cushion layer 6 on the upper part of the pile foundation 1; then, the bearing platform beam 2 is arranged on the pile foundation 1, the top end of the pile foundation 1 is immersed into the bearing platform beam 2, and the lower surface of the bearing platform beam 2 is connected with the upper surface of the cushion layer 6; placing the prefabricated composite slabs 4 between two adjacent bearing platform beams 2, connecting two sides of each prefabricated composite slab 4 with the bearing platform beams 2, pouring a post-cast strip 3 on two adjacent prefabricated composite slabs 4, connecting two adjacent prefabricated composite slabs 4 through the post-cast strips 3, and connecting the lower surfaces of the post-cast strips 3 with the bearing platform beams 2; binding reinforcing steel bars 9 in the cast-in-place surface layer 5, and pouring the cast-in-place surface layer 5 on the upper surfaces of the post-cast strip 3 and the prefabricated composite slab 4 to finish the construction of the invention, wherein a pile foundation is adopted to place a field way above frozen soil, so that the frozen soil can be protected, and the end part blocking structures 7 on the periphery are removed in winter; the end part plugging structure 7 is used in summer, and can play a role in protecting frozen soil for many years.
Claims (10)
1. The utility model provides a be applicable to built on stilts superimposed type field way structure in frozen soil district, a serial communication port, including pile foundation (1), pile foundation (1) is provided with many, and the top of every pile foundation (1) is provided with cushion cap roof beam (2), the top of cushion cap roof beam (2) is provided with post-cast strip (3), be provided with prefabricated superimposed sheet (4) between two adjacent post-cast strip (3), the upper surface of post-cast strip (3) and prefabricated superimposed sheet (4) is provided with cast-in-place surface course (5).
2. The overhead superposed type runway structure suitable for the frozen soil area according to claim 1, characterized in that the pile foundation (1) is provided with a cushion layer (6), the pile foundation (1) is arranged in the cushion layer (6) in a penetrating way, and the upper surface of the cushion layer (6) is connected with the lower surface of the bearing platform beam (2).
3. The overhead superposed type tunnel structure suitable for the frozen soil area is characterized in that an end blocking structure (7) is arranged between two adjacent bearing platform beams (2).
4. The overhead superposed type runway structure suitable for the frozen soil area according to claim 1, characterized in that a splicing seam (8) is arranged between two adjacent prefabricated composite slabs (4).
5. The overhead superposed type tunnel structure suitable for the frozen soil area according to claim 1, wherein reinforcing steel bars (9) are uniformly arranged inside the bearing platform beam (2), the post-cast strip (3), the prefabricated laminated slab (4) and the cast-in-place surface layer (5).
6. The overhead superposed type tunnel structure suitable for the frozen soil area is characterized in that the pile foundation (1) adopts a precast tubular pile or a cast-in-place pile, and the bearing platform beam (2) adopts a steel bar structure or a steel structure beam.
7. The overhead superposed type runway structure for frozen soil areas as claimed in claim 3, characterized in that the end blocking structures (7) are in a brick-laying mode or a blocking plate mode.
8. A construction method suitable for an overhead superposed type tunnel structure in a frozen soil area is characterized by comprising the following steps:
s1, leveling the field: carrying out leveling treatment on the field of the frozen soil area;
s2, constructing the pile foundation (1): submerging the whole pile foundation (1) into a field of a frozen soil area;
s3, pouring a cushion layer (6): pouring a cushion layer (6) on the upper part of the pile foundation (1);
s4, constructing a bearing platform beam (2): installing a bearing platform beam (2) on a pile foundation (1), immersing the top end of the pile foundation (1) into the bearing platform beam (2), and connecting the lower surface of the bearing platform beam (2) with the upper surface of a cushion layer (6);
s5, hoisting the prefabricated laminated slab on site (4): placing the prefabricated composite slabs (4) between two adjacent bearing platform beams (2) to connect two sides of the prefabricated composite slabs (4) with the bearing platform beams (2);
s6, casting the post-cast strip (3): pouring a post-cast strip (3) in two adjacent prefabricated composite slabs (4), connecting the two adjacent prefabricated composite slabs (4) through the post-cast strip (3), and connecting the lower surface of the post-cast strip (3) with the bearing platform beam (2);
s7, casting a cast-in-place surface layer (5): binding reinforcing steel bars (9) in the cast-in-place surface layer (5), and pouring the cast-in-place surface layer (5) on the upper surfaces of the post-cast strip (3) and the prefabricated composite slab (4);
s8, maintenance: maintaining the field structure;
s9, constructing an end blocking structure (7): an end part plugging structure (7) is built between two adjacent bearing platform beams (2).
9. The above superposed modular runway structure for frozen soil areas of claim 8, characterized in that said step S9 is to remove the end blocking structures (7) during winter; when in summer, the end plugging structure (7) is built again.
10. The above overlapped runway structure for frozen soil area as claimed in claim 8, wherein said step S9 is to eliminate the end blocking structure (7) when the height between the ground of the frozen soil area and the prefabricated composite slab (4) is less than 0.4-0.6 m; the distance between the lower surface of the end part plugging structure (7) and the field of the frozen soil area is more than or equal to 80 m.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117888586A (en) * | 2024-03-14 | 2024-04-16 | 中国科学院西北生态环境资源研究院 | A ventilation cooling system is tracked to overhead structure wind direction for cooling frozen soil foundation |
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