CN111851329A - High-fill corrugated steel pipe culvert construction system and construction method - Google Patents
High-fill corrugated steel pipe culvert construction system and construction method Download PDFInfo
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- CN111851329A CN111851329A CN202010849916.XA CN202010849916A CN111851329A CN 111851329 A CN111851329 A CN 111851329A CN 202010849916 A CN202010849916 A CN 202010849916A CN 111851329 A CN111851329 A CN 111851329A
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- 238000010276 construction Methods 0.000 title claims abstract description 62
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 53
- 239000010959 steel Substances 0.000 title claims abstract description 53
- 238000013461 design Methods 0.000 claims abstract description 16
- 238000009434 installation Methods 0.000 claims abstract description 12
- 239000011381 foam concrete Substances 0.000 claims abstract description 10
- 230000007246 mechanism Effects 0.000 claims abstract description 9
- 239000000758 substrate Substances 0.000 claims abstract description 9
- 238000005056 compaction Methods 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 14
- 238000007789 sealing Methods 0.000 claims description 12
- 239000002689 soil Substances 0.000 claims description 11
- 239000010426 asphalt Substances 0.000 claims description 9
- 238000009412 basement excavation Methods 0.000 claims description 9
- 239000004568 cement Substances 0.000 claims description 9
- 239000004576 sand Substances 0.000 claims description 6
- 229920000742 Cotton Polymers 0.000 claims description 4
- 238000007710 freezing Methods 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 3
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 3
- 230000001680 brushing effect Effects 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 230000008014 freezing Effects 0.000 claims description 3
- 238000005246 galvanizing Methods 0.000 claims description 3
- 239000004571 lime Substances 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 239000003566 sealing material Substances 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 239000004575 stone Substances 0.000 claims description 3
- 238000007711 solidification Methods 0.000 abstract description 3
- 230000008023 solidification Effects 0.000 abstract description 3
- 230000006872 improvement Effects 0.000 description 8
- 239000004567 concrete Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 206010063659 Aversion Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
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- 230000009286 beneficial effect Effects 0.000 description 1
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- 239000003973 paint Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F5/00—Draining the sub-base, i.e. subgrade or ground-work, e.g. embankment of roads or of the ballastway of railways or draining-off road surface or ballastway drainage by trenches, culverts, or conduits or other specially adapted means
- E01F5/005—Culverts ; Head-structures for culverts, or for drainage-conduit outlets in slopes
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Abstract
The invention provides a high-fill corrugated steel pipe culvert construction system and a construction method, wherein a plurality of support rods are circumferentially positioned and arranged on support rods of a temporary internal support mechanism; one end of the telescopic bracket is arranged on the support rod of the support rod, and the other end of the telescopic bracket is respectively abutted against the inner side wall of the corrugated pipe to realize the circumferential support of the corrugated pipe; an arc-shaped groove structure matched with the sectional size of the corrugated pipe is arranged on the base of the prefabricated limiting seat; the embedded part is arranged on the base substrate; the embedded part is connected with the bottom of the base in a positioning way; the guide support is positioned at the circumferential outer side of the corrugated pipe; the utility model provides an it is intraductal that steel bellows is stayed in through interior support with adjustable to set up spacing seat of prefabricated assembled and guide bracket, pipeline bottom both sides wedge position is backfilled through foam concrete, later tamps with tamping machine slant, treats that foam concrete carries out its continuation part after the solidification and backfills again, utilizes natural gravel to carry out the layering and backfills, has improved the stability and the installation accuracy of the bellows of whole construction greatly, reasonable in design.
Description
Technical Field
The invention relates to the technical field of culvert construction, in particular to culvert pipe culvert construction and water supply and drainage engineering in areas with low bearing capacity of foundations such as high-freezing frozen soil, soft soil, expansive soil, collapsible loess and the like, areas with frequent earthquakes and areas such as high-fill roadbed with uneven foundation settlement.
Background
In the actual engineering application of pipe culvert, the concrete culvert structure ubiquitous construction cycle is long, the concrete volume is big, the precast cover board hoist and mount degree of difficulty is big and during the normal use stage phenomenon such as fracture, the inhomogeneous settlement of basis, aversion to when above-mentioned problem appears in the culvert, because the buried depth is great, the maintenance with consolidate the difficulty.
The corrugated pipe culvert has different change rules under different working conditions, wherein the pipe diameter, the soil filling height, the backfill foundation, the pipe wall thickness and the waveform of the section have great influence on the deformation under the loading action. The steel corrugated culvert is largely used in the construction of traffic engineering due to its many advantages and related characteristics, but how to better ensure the pre-camber of the steel corrugated culvert and the precision and stability of the steel corrugated culvert in construction still needs to be further explored.
Disclosure of Invention
The invention aims to provide a high-fill square steel corrugated pipe culvert construction system and a construction method, and aims to solve the technical problems of optimizing the segment assembly and segment installation of the steel corrugated pipe culvert and controlling and limiting the pipe culvert during soil backfilling.
In order to achieve the purpose, the invention is realized by the following technical scheme:
the high-fill corrugated steel pipe culvert construction system comprises a temporary inner support mechanism, a prefabricated limiting seat and a guide bracket;
the temporary internal support mechanism comprises a support rod and a telescopic support; a plurality of support rods are circumferentially positioned on the support rod; one end of the telescopic support is arranged on the support rod of the support rod, and the other end of the telescopic support is respectively abutted against the inner side wall of the corrugated pipe and is used for realizing the circumferential support of the temporary inner support machine on the corrugated pipe;
the prefabricated limiting seat comprises a base and an embedded part; an arc-shaped groove structure matched with the sectional size of the corrugated pipe is arranged on the base; the embedded part is arranged on the base; the embedded part is connected with the bottom of the base in a positioning manner;
the guide bracket comprises a side frame and a top frame; two ends of the top frame are respectively connected with the upper ends of the side frames; the guide support is positioned at the circumferential outer side of the corrugated pipe.
As a further improvement of the invention, the support rod is of a cross-shaped rod body structure.
As a further improvement of the invention, the telescopic bracket is of a telescopic loop bar structure; the front end of the telescopic support is wrapped with flexible isolating cotton.
As a further improvement of the invention, the telescopic bracket is also provided with scales.
As a further improvement of the invention, the telescopic bracket is formed by assembling an outer loop bar and an inner loop bar; the outer loop bar is a fixed bar, scales are marked on the inner loop bar, the outer end of the inner loop bar is provided with buttons, and springs are transversely arranged between the buttons on the two sides; the inner both sides of inner loop bar are provided with the slidingtype stopper, are connected with the spring between the stopper, the slidingtype stopper passes through the connecting rod with the button and is connected.
As a further improvement of the invention, the embedded part is a fixing buckle; the bottom of the base is provided with a horizontal rod in a positioning mode, and the base is connected with the embedded part in a positioning mode through the fixing buckle and the horizontal rod in a sleeved mode.
As a further improvement of the invention, the top of the embedded part is provided with a circular fixing ring; the base is arranged at the bottoms of two sides of the steel corrugated pipe, the shapes of the two sides are wedge-shaped respectively, and the curvature of the arc-shaped groove structure is the same as that of the pipeline; the bottom of the base is provided with an open channel, and a horizontal rod is welded in the open channel and is used for being sleeved and positioned with the fixing buckle.
As a further improvement of the invention, a stair and an operation platform are arranged on the side frame; stairs and operation platforms with different heights are arranged in the height direction of the side frames; and a guardrail is arranged on the outer side of the operating platform.
As a further improvement of the invention, a channel is arranged on the top frame, the side frame and the top frame are connected with a limit baffle through a scale rod, and the position of the limit baffle is adjusted through an adjusting nut so as to position the pipe joint of the corrugated pipe.
The construction method of the high-fill corrugated steel pipe culvert comprises the following steps:
s1, construction preparation: selecting materials such as cement, sand, broken stone, rubble, reinforcing steel bars and the like required by culvert construction according to design and related construction specification requirements, and sending the materials to a construction site in stages after the materials are qualified;
s1, measurement lofting: leveling a construction site, and arranging materials and mechanical equipment; before the construction of the pipe culvert, the center and the longitudinal and transverse axes of the pipe culvert are released according to design files, middle-side piles are driven, white lime lines are scattered on the central axis and the edge of a foundation range of the culvert, and the elevation of the original ground is measured; meanwhile, the placing positions of the prefabricated limiting devices are calculated at the positions of the two sides of the pipeline, and embedded parts are installed;
s3, foundation excavation: accurately determining the center and the longitudinal and transverse axes of the culvert before construction, and rechecking the actual situation of the site to be consistent with the design drawing; manually cooperating with machinery to excavate, reserving 10cm-20cm of manual excavation leveling for a substrate, and performing temporary drainage; when the foundation is excavated to the designed elevation, detecting the bearing capacity of the foundation; after the excavation is finished, checking the size and the elevation of the substrate, and performing temporary drainage; after confirming that the embedding depth of the bottom surface of the culvert platform foundation meets the design and standard requirements, ensuring that the embedding depth is not less than 0.25m below a freezing line;
s4, pre-camber setting: the steel corrugated pipe laid under the embankment needs to be provided with pre-camber which is set in a parabolic form, and the pre-camber is uniformly set to be 0.8 percent according to the comprehensive consideration of factors such as longitudinal slope of culvert bottom, soil filling height and the like;
s5, gravel cushion construction: paving a uniform cushion layer with a thickness of 10cm on the foundation by gravel, then filling and compacting in layers, wherein the compaction thickness of each layer is 15cm, the compaction degree is not less than 95%, and then paving the next layer after the compaction degree meets the requirement;
s6, cement stabilized sand cushion construction: after the gravel is paved, constructing a cement cushion layer to stabilize the pipeline foundation;
s7, assembling the steel corrugated pipe culvert: firstly, duct piece installation is carried out, an assembly bottom plate takes the center of a central axis as a datum point, an adjustable temporary inner support is placed in a duct, and a telescopic support of the inner support is propped against the inside of a corrugated duct to serve as a guide support; the circumferential connection adopts a step type, namely the joint of the upper two plates is staggered with the joint of the lower two plates; the connecting holes are aligned and then the bolts penetrate from inside to outside;
then segment installation is carried out, the corrugated pipe culvert safe assembly guide support is utilized for auxiliary connection in the assembly of the corrugated pipe culvert, and the segments are assembled on site by adopting a steel corrugated pipe culvert and connected by high-strength bolts; when the pipe joint is installed, a first pipe joint is arranged from one side, the center of the pipe is parallel to the longitudinal center line of a foundation, a second pipe is placed in place, and when a gap of 3-5 cm is formed between adjacent flanges of the two pipes, a small crowbar is aligned to bolt holes in the flanges, so that the bolt holes in the two pipe flanges are aligned; prying the pipe joint from the other end of the second pipe joint by using a prying bar to longitudinally translate the pipe joint, enabling the distance between the two flanges to be about 2cm, installing a rubber sealing ring with better durability between the two flanges, then completely threading bolts, and screwing screws and fastening bolts; the rubber sealing ring is matched with the fastener; the bolts and the nuts are subjected to hot galvanizing treatment, and the splicing treatment is cleaned up to ensure that the splicing seams are tightly lapped; then connecting the sections one by one in this way;
finally, installing a sealing ring and a nut, cutting a gap between two adjacent flanges, inlaying the sealing ring between the two flanges and then fixing, and screwing the nut; after all the components are assembled, the nuts are screwed one by one; the torque of each nut is not less than 135.6N.m, and not more than 203.4N.m at most; after the bolts at the lap joint of the outer ring are screwed and meet the requirements, the joints of the steel plates and the bolt holes are sealed by special sealing materials to prevent the joints of the corrugated plates from water seepage;
s8, installing a limiting device: placing the prefabricated base on two sides of the lower part of the steel corrugated pipe, and moving the limiting piece along the axial direction of the corrugated pipe to enable a horizontal rod at the bottom of the limiting piece to penetrate through the fixing buckle at the top of the embedded part to form a limiting buckle;
s9, brushing the steel corrugated pipe: spraying emulsified asphalt or hot asphalt on the inner and outer pipe walls of the pipe sections twice, uniformly coating the inner and outer pipe walls into black pipes, and backfilling after the asphalt is dried;
s10, backfilling the side and the top of the steel corrugated pipe culvert pipe: firstly, backfilling the wedge-shaped part at the bottom of the pipe: the backfill of the wedge-shaped part at the bottom of the pipe adopts light foam concrete backfill, and then is obliquely tamped by a small-sized tamping machine, so that the backfill quality of the bottom of the pipe is ensured;
and backfilling two side parts of the culvert pipe: natural gravel backfill with good gradation is adopted; before filling, marking filling height marks on two side surfaces of the corrugated pipe culvert, and controlling according to a marking line during filling; during filling, filling layer by layer, compacting layer by layer, wherein the thickness of each layer of compaction is 15cm, and the next layer of filling can be carried out when the degree of compaction reaches 95%; the filling must be symmetrically and synchronously carried out on both sides of the culvert pipe, and the height difference of the backfill soil on both sides is not more than 15 cm;
finally, backfilling the top of the culvert pipe: when the backfill thickness above the culvert pipes is less than 50cm, compacting by using a hand vibration rammer, and when the backfill on the top of the culvert pipes is more than 50cm, compacting by using an 18T road roller, wherein the thickness of each layer is 15cm, and the compaction degree meets the specification requirement; and after backfilling is finished, the adjustable inner support in the pipe culvert can be disassembled.
Compared with the prior art, the invention has the beneficial effects that:
in this application stayed steel bellows intraductal through adjustable interior support, and set up spacing seat of prefabricated assembly and guide bracket, pipeline bottom both sides wedge position was backfilled through foam concrete, and later with small-size tamping machinery slant tamping, treat that foam concrete carries out its continuation part after the solidification and backfill, utilizes natural gravel to carry out the layering and backfills, has improved the stability and the installation accuracy of the bellows of whole construction greatly, reasonable in design.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the temporary internal support mechanism and bellows mounting structure of the present invention;
FIG. 3 is a schematic view of the telescoping support structure of the present invention;
FIG. 4 is a sectional view of an installation structure of the sliding type stopper of the present invention;
FIG. 5 is a schematic view of another telescoping support structure of the present invention;
FIG. 6 is a schematic view of the mounting structure of the guide bracket and bellows of the present invention;
FIG. 7 is a schematic view of the construction of the bellows assembly of the present invention;
FIG. 8 is a top view of the guide bracket of the present invention;
FIG. 9 is a schematic view of a partial structure of a prefabricated assembled spacing block according to the present invention;
FIG. 10 is a block diagram of a construction process of the present invention;
the reference numbers in the figures illustrate:
1. a temporary internal support mechanism; 11. a holder rod; 111. a strut; 12. a telescopic bracket; 121. an outer loop bar; 122. an inner loop bar; 123. a button; 124. a spring; 125. a sliding type limiting block; 126. a connecting rod; 2. prefabricating an assembled limiting seat; 21. a base; 22. embedding parts; 23. a horizontal bar; 3. a guide bracket; 31. a side frame; 311. a staircase; 312. an operating platform; 32. a top frame; 4. a bellows; 5. a base substrate; 6. natural gravel; 7. foam concrete; 8. flexible isolating cotton; 9 adjusting the nut; 10. a limit baffle; 20. a graduated rod; 30. a channel.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a high-fill steel corrugated pipe culvert construction system and a construction method by combining with attached drawings 1-10, and aims to optimize the technical problem of controlling and limiting a pipe culvert during segment assembly, segment installation and soil body backfilling of the steel corrugated pipe culvert.
Specifically, the high-fill corrugated steel pipe culvert construction system comprises a temporary internal support mechanism 1, a prefabricated limiting seat 2 and a guide bracket 3;
the temporary internal support mechanism 1 comprises a support rod 11 and a telescopic support 12; a plurality of struts 111 are circumferentially positioned on the support rod 11; one end of the telescopic bracket 12 is arranged on the support rod 111 of the support rod 11, and the other end of the telescopic bracket is respectively abutted against the inner side wall of the corrugated pipe 4, so that the temporary inner support machine can support the corrugated pipe 4 in the circumferential direction;
the prefabricated limiting seat 2 comprises a base 21 and an embedded part 22; an arc-shaped groove structure matched with the section size of the corrugated pipe 4 is arranged on the base 21; the embedded part 22 is arranged on the base substrate 5; the embedded part 22 is connected with the bottom of the base 21 in a positioning way;
the guide bracket 3 comprises a side frame 31 and a top frame 32; two ends of the top frame 32 are respectively connected with the upper ends of the side frames 31; the guide bracket 3 is positioned at the circumferential outer side of the corrugated pipe 4.
In this application stayed steel bellows intraductal through adjustable interior support, and set up spacing seat of prefabricated assembly and guide bracket, pipeline bottom both sides wedge position was backfilled through foam concrete, and later with small-size tamping machinery slant tamping, treat that foam concrete carries out its continuation part after the solidification and backfill, utilizes natural gravel to carry out the layering and backfills, has improved the stability and the installation accuracy of the bellows of whole construction greatly, reasonable in design.
Further, the telescopic bracket 12 is a telescopic loop bar structure; the front end of the telescopic support 12 is wrapped with flexible isolating cotton 8, so that the anticorrosive paint in the corrugated steel pipe 4 can be prevented from being damaged.
Furthermore, the telescopic support 12 is provided with scales, so that control and assembly precision can be realized when the duct pieces are assembled.
Preferably, the telescopic bracket 12 is formed by assembling an outer loop bar 121 and an inner loop bar 122; the outer loop bar 121 is a fixed bar, scales are marked on the inner loop bar 122, a button 123 is arranged at the outer end of the inner loop bar 122, and a spring 124 is transversely arranged between the buttons 123 at the two sides; two sides of the inner end of the inner loop bar 122 are provided with sliding type limiting blocks 125, springs 124 are connected between the limiting blocks, and the sliding type limiting blocks 125 are connected with the buttons 123 through connecting rods 126;
it should be noted that the limiting block 125 is clamped on the slide way of the inner loop bar 122, and the limiting block is elastically abutted against and limited by the spring 124 with the inner side wall of the outer loop bar 121, when the inner loop bar 122 needs to be stretched, the button 123 is pressed inwards from the outside to compress the connecting rod 126 so as to drive the limiting block to extrude inwards, so that the inner loop bar 122 and the outer loop bar 121 are loosened, at this time, the inner loop bar 122 is moved to realize position adjustment in the outer loop bar 121, and then the button 123 is released to realize outward elastic abutment of the limiting block (when the limiting block 125 abuts against the inner wall of the outer loop bar, the spring 124 is in a compressed state), so that positioning setting of the inner loop bar 122 can be realized, adjustment is convenient and fast, and quick adjustment of the inner loop bar 122 can be realized.
In another embodiment, the telescoping support 12 includes an inner loop bar 122 and an outer loop bar 121; the inner end of the outer loop bar 121 is fixedly arranged on the supporting rod 111; the inner loop bar 122 is sleeved with the outer loop bar 121; the inner loop bar 122 is also provided with a spring 124 button 123, and the spring 124 button 123 is used for realizing the penetrating positioning with the outer loop bar 121; the inner loop bar 122 is provided with scales.
Further, the embedded part 22 is a fixing buckle; the bottom of the base 21 is provided with a horizontal rod 23 in a positioning manner, and the base 21 and the embedded part 22 are connected in a positioning manner through the sleeve connection of a fixing buckle and the horizontal rod 23.
Specifically, the embedded parts 22 are embedded at the design positions of the bases 21 on the two sides of the pipeline in the process of measurement lofting, and the top parts of the embedded parts 22 are provided with circular fixing rings; the base 21 is arranged at the bottoms of two sides of the steel corrugated pipe 4, the shapes of the two sides are wedge-shaped, and the curvature of the arc-shaped groove structure is the same as that of the pipeline; the bottom of the base 21 is provided with an open channel, and a horizontal rod 23 is welded in the open channel and is used for being sleeved and positioned with the fixing buckle.
Further, a stair 311 and an operation platform 312 are arranged on the side frame 31; a stair 311 and operation platforms 312 with different heights are arranged in the height direction of the side frame 31; the outer side of the operating platform 312 is provided with a guardrail.
Furthermore, a channel 30 is arranged on the top frame 32, the side frame 31 and the top frame 32 are connected with a limit baffle 10 through a graduated rod 20, and the position of the limit baffle 10 is adjusted through an adjusting nut 9, so as to position the pipe joint of the corrugated pipe 4.
The construction method of the high-fill corrugated steel pipe culvert comprises the following steps:
s1, construction preparation: selecting materials such as cement, sand, broken stone, rubble, reinforcing steel bars and the like required by culvert construction according to design and related construction specification requirements, and sending the materials to a construction site in stages after the materials are qualified;
s1, measurement lofting: leveling a construction site, and arranging materials and mechanical equipment; before the construction of the pipe culvert, the center and the longitudinal and transverse axes of the pipe culvert are released according to design files, middle-side piles are driven, white lime lines are scattered on the central axis and the edge of a foundation range of the culvert, and the elevation of the original ground is measured; meanwhile, the placing positions of the prefabricated limiting devices are calculated at the positions of the two sides of the pipeline, and embedded parts 22 are installed;
s3, foundation excavation: accurately determining the center and the longitudinal and transverse axes of the culvert before construction, and rechecking the actual situation of the site to be consistent with the design drawing; manually cooperating with machinery to excavate, reserving 10cm-20cm of manual excavation leveling for a substrate, and performing temporary drainage; when the foundation is excavated to the designed elevation, detecting the bearing capacity of the foundation; after the excavation is finished, checking the size and the elevation of the substrate, and performing temporary drainage; after confirming that the embedding depth of the bottom surface of the culvert platform foundation meets the design and standard requirements, ensuring that the embedding depth is not less than 0.25m below a freezing line;
s4, pre-camber setting: the steel corrugated pipe 4 laid under the embankment needs to be provided with pre-camber, the pre-camber is arranged in a parabolic form, and the pre-camber is uniformly set to be 0.8 percent according to the comprehensive consideration of factors such as the longitudinal slope of the culvert bottom, the filling height and the like;
s5, gravel cushion construction: paving a uniform cushion layer with a thickness of 10cm on the foundation by gravel, then filling and compacting in layers, wherein the compaction thickness of each layer is 15cm, the compaction degree is not less than 95%, and then paving the next layer after the compaction degree meets the requirement;
s6, cement stabilized sand cushion construction: after the gravel is paved, constructing a cement cushion layer to stabilize the pipeline foundation;
s7, splicing the corrugated steel pipe 4: firstly, duct piece installation is carried out, an assembly bottom plate takes the center of a central axis as a datum point, an adjustable temporary inner support is placed in a pipe, and a telescopic support 12 of the inner support is propped against the inside of a pipe culvert to serve as a guide support; the circumferential connection adopts a step type, namely the joint of the upper two plates is staggered with the joint of the lower two plates; the connecting holes are aligned and then the bolts penetrate from inside to outside;
then segment installation is carried out, the segments of the corrugated pipe 4 are assembled by using the safe assembling guide support 3 of the corrugated pipe 4 culvert for auxiliary connection, and the segments are assembled on site by using the steel corrugated pipe 4 culvert and connected by high-strength bolts; when the pipe joint is installed, a first pipe joint is arranged from one side, the center of the pipe is parallel to the longitudinal center line of a foundation, a second pipe is placed in place, and when a gap of 3-5 cm is formed between adjacent flanges of the two pipes, a small crowbar is aligned to bolt holes in the flanges, so that the bolt holes in the two pipe flanges are aligned; prying the pipe joint from the other end of the second pipe joint by using a prying bar to longitudinally translate the pipe joint, enabling the distance between the two flanges to be about 2cm, installing a rubber sealing ring with better durability between the two flanges, then completely threading bolts, and screwing screws and fastening bolts; the rubber sealing ring is matched with the fastener; the bolts and the nuts are subjected to hot galvanizing treatment, and the splicing treatment is cleaned up to ensure that the splicing seams are tightly lapped; then connecting the sections one by one in this way;
finally, installing a sealing ring and a nut, cutting a gap between two adjacent flanges, inlaying the sealing ring between the two flanges and then fixing, and screwing the nut; after all the components are assembled, the nuts are screwed one by one; the torque of each nut is not less than 135.6N.m, and not more than 203.4N.m at most; after the bolts at the lap joint of the outer ring are screwed and meet the requirements, the joints of the steel plates and the bolt holes are sealed by special sealing materials to prevent the joints of the corrugated plates from water seepage;
s8, installing a limiting device: placing the prefabricated base 21 on two sides of the lower part of the steel corrugated pipe 4, and moving the limiting piece along the axial direction of the corrugated pipe to enable the horizontal rod 23 at the bottom of the limiting piece to penetrate through the fixing buckle at the top of the embedded part 22 to form a limiting buckle;
s9, brushing the steel corrugated pipe 4: spraying emulsified asphalt or hot asphalt on the inner and outer pipe walls of the pipe sections twice, uniformly coating the inner and outer pipe walls into black pipes, and backfilling after the asphalt is dried;
s10, backfilling the pipe side and the pipe top of the corrugated steel pipe 4 culvert: firstly, backfilling the wedge-shaped part at the bottom of the pipe: the backfill of the wedge-shaped part at the bottom of the pipe adopts light foam concrete 7 to backfill and then uses a small tamping machine to tamp obliquely so as to ensure the backfill quality of the bottom of the pipe;
and backfilling two side parts of the culvert pipe: adopting natural gravel 6 backfill with good gradation; before filling, marking filling height on two sides of the culvert of the corrugated pipe 4, and controlling according to a marking line during filling; during filling, filling layer by layer, compacting layer by layer, wherein the thickness of each layer of compaction is 15cm, and the next layer of filling can be carried out when the degree of compaction reaches 95%; the filling must be symmetrically and synchronously carried out on both sides of the culvert pipe, and the height difference of the backfill soil on both sides is not more than 15 cm;
finally, backfilling the top of the culvert pipe: when the backfill thickness above the culvert pipes is less than 50cm, compacting by using a hand vibration rammer, and when the backfill on the top of the culvert pipes is more than 50cm, compacting by using an 18T road roller, wherein the thickness of each layer is 15cm, and the compaction degree meets the specification requirement; and after backfilling is finished, the adjustable inner support in the pipe culvert can be disassembled.
It should be noted that the detailed description of the invention is not included in the prior art, or can be directly obtained from the market, and the detailed connection mode can be widely applied in the field or daily life without creative efforts, and the detailed description is not repeated here.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. High fill steel corrugated pipe culvert construction system, its characterized in that: the device comprises a temporary internal support mechanism, a prefabricated limiting seat and a guide bracket;
the temporary internal support mechanism comprises a support rod and a telescopic support; a plurality of support rods are circumferentially positioned on the support rod; one end of the telescopic support is arranged on the support rod of the support rod, and the other end of the telescopic support is respectively abutted against the inner side wall of the corrugated pipe and is used for realizing the circumferential support of the temporary inner support machine on the corrugated pipe;
the prefabricated limiting seat comprises a base and an embedded part; an arc-shaped groove structure matched with the sectional size of the corrugated pipe is arranged on the base; the embedded part is arranged on the base; the embedded part is connected with the bottom of the base in a positioning manner;
the guide bracket comprises a side frame and a top frame; two ends of the top frame are respectively connected with the upper ends of the side frames; the guide support is positioned at the circumferential outer side of the corrugated pipe.
2. The high fill steel corrugated culvert construction system of claim 1, wherein: the support rod is of a cross-shaped rod body structure.
3. The high fill steel corrugated culvert construction system of claim 1, wherein: the telescopic support is of a telescopic loop bar structure; the front end of the telescopic support is wrapped with flexible isolating cotton.
4. The high fill steel corrugated culvert construction system of claim 1, wherein: scales are further arranged on the telescopic support.
5. The high fill steel corrugated culvert construction system of claim 1, wherein: the telescopic bracket is formed by assembling an outer loop bar and an inner loop bar; the outer loop bar is a fixed bar, scales are marked on the inner loop bar, the outer end of the inner loop bar is provided with buttons, and springs are transversely arranged between the buttons on the two sides; the inner both sides of inner loop bar are provided with the slidingtype stopper, are connected with the spring between the stopper, the slidingtype stopper passes through the connecting rod with the button and is connected.
6. The high fill steel corrugated culvert construction system of claim 1, wherein: the embedded part is a fixing buckle; the bottom of the base is provided with a horizontal rod in a positioning mode, and the base is connected with the embedded part in a positioning mode through the fixing buckle and the horizontal rod in a sleeved mode.
7. The high fill steel corrugated culvert construction system of claim 1, wherein: the top of the embedded part is provided with a circular fixing ring; the base is arranged at the bottoms of two sides of the steel corrugated pipe, the shapes of the two sides are wedge-shaped respectively, and the curvature of the arc-shaped groove structure is the same as that of the pipeline; the bottom of the base is provided with an open channel, and a horizontal rod is welded in the open channel and is used for being sleeved and positioned with the fixing buckle.
8. The high fill steel corrugated culvert construction system of claim 1, wherein: a stair and an operation platform are arranged on the side frame; stairs and operation platforms with different heights are arranged in the height direction of the side frames; and a guardrail is arranged on the outer side of the operating platform.
9. The high fill steel corrugated culvert construction system of claim 1, wherein: the top frame is provided with a channel, the side frame and the top frame are connected with a limiting baffle through a scale rod, and the position of the limiting baffle is adjusted through an adjusting nut so as to position a pipe joint of the corrugated pipe.
10. The high-fill corrugated steel pipe culvert construction method is based on the high-fill corrugated steel pipe culvert construction system of any one of claims 1 to 9, and is characterized by comprising the following steps of:
s1, construction preparation: selecting materials such as cement, sand, broken stone, rubble, reinforcing steel bars and the like required by culvert construction according to design and related construction specification requirements, and sending the materials to a construction site in stages after the materials are qualified;
s2, measurement lofting: leveling a construction site, and arranging materials and mechanical equipment; before the construction of the pipe culvert, the center and the longitudinal and transverse axes of the pipe culvert are released according to design files, middle-side piles are driven, white lime lines are scattered on the central axis and the edge of a foundation range of the culvert, and the elevation of the original ground is measured; meanwhile, the placing positions of the prefabricated limiting devices are calculated at the positions of the two sides of the pipeline, and embedded parts are installed;
s3, foundation excavation: accurately determining the center and the longitudinal and transverse axes of the culvert before construction, and rechecking the actual situation of the site to be consistent with the design drawing; manually cooperating with machinery to excavate, reserving 10cm-20cm of manual excavation leveling for a substrate, and performing temporary drainage; when the foundation is excavated to the designed elevation, detecting the bearing capacity of the foundation; after the excavation is finished, checking the size and the elevation of the substrate, and performing temporary drainage; after confirming that the embedding depth of the bottom surface of the culvert platform foundation meets the design and standard requirements, ensuring that the embedding depth is not less than 0.25m below a freezing line;
s4, pre-camber setting: the steel corrugated pipe laid under the embankment needs to be provided with pre-camber which is set in a parabolic form, and the pre-camber is uniformly set to be 0.8 percent according to the comprehensive consideration of factors such as longitudinal slope of culvert bottom, soil filling height and the like;
s5, gravel cushion construction: paving a uniform cushion layer with a thickness of 10cm on the foundation by gravel, then filling and compacting in layers, wherein the compaction thickness of each layer is 15cm, the compaction degree is not less than 95%, and then paving the next layer after the compaction degree meets the requirement;
s6, cement stabilized sand cushion construction: after the gravel is paved, constructing a cement cushion layer to stabilize the pipeline foundation;
s7, assembling the steel corrugated pipe culvert: firstly, duct piece installation is carried out, an assembly bottom plate takes the center of a central axis as a datum point, an adjustable temporary inner support is placed in a duct, and a telescopic support of the inner support is propped against the inside of a corrugated duct to serve as a guide support; the circumferential connection adopts a step type, namely the joint of the upper two plates is staggered with the joint of the lower two plates; the connecting holes are aligned and then the bolts penetrate from inside to outside;
then segment installation is carried out, the corrugated pipe culvert safe assembly guide support is utilized for auxiliary connection in the assembly of the corrugated pipe culvert, and the segments are assembled on site by adopting a steel corrugated pipe culvert and connected by high-strength bolts; when the pipe joint is installed, a first pipe joint is arranged from one side, the center of the pipe is parallel to the longitudinal center line of a foundation, a second pipe is placed in place, and when a gap of 3-5 cm is formed between adjacent flanges of the two pipes, a small crowbar is aligned to bolt holes in the flanges, so that the bolt holes in the two pipe flanges are aligned; prying the pipe joint from the other end of the second pipe joint by using a prying bar to longitudinally translate the pipe joint, enabling the distance between the two flanges to be about 2cm, installing a rubber sealing ring with better durability between the two flanges, then completely threading bolts, and screwing screws and fastening bolts; the rubber sealing ring is matched with the fastener; the bolts and the nuts are subjected to hot galvanizing treatment, and the splicing treatment is cleaned up to ensure that the splicing seams are tightly lapped; then connecting the sections one by one in this way;
finally, installing a sealing ring and a nut, cutting a gap between two adjacent flanges, inlaying the sealing ring between the two flanges and then fixing, and screwing the nut; after all the components are assembled, the nuts are screwed one by one; the torque of each nut is not less than 135.6N.m, and not more than 203.4N.m at most; after the bolts at the lap joint of the outer ring are screwed and meet the requirements, the joints of the steel plates and the bolt holes are sealed by special sealing materials to prevent the joints of the corrugated plates from water seepage;
s8, installing a limiting device: placing the prefabricated base on two sides of the lower part of the steel corrugated pipe, and moving the limiting piece along the axial direction of the corrugated pipe to enable a horizontal rod at the bottom of the limiting piece to penetrate through the fixing buckle at the top of the embedded part to form a limiting buckle;
s9, brushing the steel corrugated pipe: spraying emulsified asphalt or hot asphalt on the inner and outer pipe walls of the pipe sections twice, uniformly coating the inner and outer pipe walls into black pipes, and backfilling after the asphalt is dried;
s10, backfilling the side and the top of the steel corrugated pipe culvert pipe: firstly, backfilling the wedge-shaped part at the bottom of the pipe: the backfill of the wedge-shaped part at the bottom of the pipe adopts light foam concrete backfill, and then is obliquely tamped by a small-sized tamping machine, so that the backfill quality of the bottom of the pipe is ensured;
and backfilling two side parts of the culvert pipe: natural gravel backfill with good gradation is adopted; before filling, marking filling height marks on two side surfaces of the corrugated pipe culvert, and controlling according to a marking line during filling; during filling, filling layer by layer, compacting layer by layer, wherein the thickness of each layer of compaction is 15cm, and the next layer of filling can be carried out when the degree of compaction reaches 95%; the filling must be symmetrically and synchronously carried out on both sides of the culvert pipe, and the height difference of the backfill soil on both sides is not more than 15 cm;
finally, backfilling the top of the culvert pipe: when the backfill thickness above the culvert pipes is less than 50cm, compacting by using a hand vibration rammer, and when the backfill on the top of the culvert pipes is more than 50cm, compacting by using an 18T road roller, wherein the thickness of each layer is 15cm, and the compaction degree meets the specification requirement; and after backfilling is finished, the adjustable inner support in the pipe culvert can be disassembled.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114197613A (en) * | 2021-12-20 | 2022-03-18 | 山西路桥第七工程有限公司 | Steel corrugated pipe culvert construction process |
| CN116877827A (en) * | 2023-09-04 | 2023-10-13 | 山西八建集团有限公司 | Repair-free damaged corrugated pipe device and construction method |
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| CN111851329B (en) | 2024-07-02 |
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