CN112458883A - Connecting section structure of highway soft soil roadbed and bridge and culvert structure and construction method - Google Patents
Connecting section structure of highway soft soil roadbed and bridge and culvert structure and construction method Download PDFInfo
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- CN112458883A CN112458883A CN202011428655.0A CN202011428655A CN112458883A CN 112458883 A CN112458883 A CN 112458883A CN 202011428655 A CN202011428655 A CN 202011428655A CN 112458883 A CN112458883 A CN 112458883A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
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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
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Abstract
The invention provides a connecting section structure of a soft soil roadbed and a bridge and culvert structure of a highway and a construction method. When the bridge head is settled, the settlement is firstly found at the abutment position which is closer to the bridge floor, so that the butt strap is in a state of being low in front and high in back, the pressing butt strap is pressed intermittently to the piezoelectric rings or the micro switches in the first sinking groove and the second sinking groove after a vehicle is driven off from the bridge, the heating pipe is triggered by the piezoelectric rings or the micro switches, the temporary support of the sulfur mortar can be removed after the heating pipe is heated, the settlement marker post can sink under the action of the spring, the settlement of the bridge head is prompted to be over-limited, the settlement condition of the bridge head can be found in time, and the control is carried out in time.
Description
Technical Field
The invention relates to a connecting section structure of a soft soil roadbed and a bridge and culvert structure of a highway and a construction method.
Background
The construction of the connection section of the soft soil roadbed and the bridge and culvert structure is a problem encountered in many current engineering constructions. Through continuous development for decades, various methods for treating soft soil foundation exist, and new methods, new materials and new processes are emerging continuously. For a specific project, how to select a proper foundation treatment method becomes a concern. At present, the common domestic soft soil roadbed and bridge and culvert structure connection section foundation treatment technologies are various, including the following: prestressed pipe piles, cement mixing pile methods, preloading method, replacement methods and the like. Foreign countries have various methods for processing the connection section of the soft soil roadbed and the bridge and culvert structure. For example, the deep stirring method, the chemical grouting method, the reinforced earth method, the foundation anchor rod method, the light filling method and the like are generally adopted in Japan; in the united states, soil stabilization, shallow foundation, deep foundation, grouting, etc. are generally used. In recent years, with the rapid development of national economy, China is facing the peak period of large-scale engineering construction, and particularly the construction of high-grade roads including municipal roads such as expressways and urban expressways is rapidly developed. In the process of road construction, the treatment of the roadbed is inevitably carried out, and in the treatment process, a soft soil zone with poor engineering geological conditions is frequently encountered, and the zone has the characteristics of large settlement, high compressibility and poor drainage consolidation stability. In order to ensure the engineering quality, special treatment is needed, otherwise, a plurality of roadbed quality problems are caused. If the problem of vehicle jumping caused by serious differential settlement of bridges and culverts and roadbeds commonly existing in soft soil areas of rivers and pearl triangular regions is solved, driving accidents can be caused in serious situations. Therefore, the research on the construction technology of the connecting section of the bridge and culvert structure and the soft soil roadbed has important theoretical significance and practical value.
The technical standard adopted by the meeting port major road engineering is a first-level highway, the total length is designed to be 7.12km, and 16 bridges and culverts are designed. In Jiangmeng province, the route is in the Yangtze river and door city of the Zhujiang Delta, the sea-land alternate deposition plain and the soft soil layer are developed, and the pearl river delta sea-land alternate deposition plain has the characteristics of wide distribution, large thickness, low bearing capacity and high compressibility, is mostly dark gray, saturated and plastic and contains a small amount of humus. The bridge culvert and the roadbed connecting section which are operated at present in the river region have settlement of different degrees, the settlement of the roadbed at the bridge head of a part of roads reaches more than 1m, the phenomenon of vehicle jump at the bridge head is serious, and great influence is brought to driving safety. The invention provides a technical measure for controlling the settlement of the connecting section of the bridges and the roadbed by starting from the aspects of original foundation treatment and filling control of the connecting section of the bridges and the roadbed on the basis of the meeting port and major road project.
Disclosure of Invention
The invention aims to provide a connecting section structure of a soft soil roadbed and a bridge and culvert structure of a highway, which is convenient for controlling the settlement of a roadbed at the bridge head, and adopts the following technical scheme:
a connection section structure of a highway soft soil roadbed and a bridge and culvert structure comprises a bridge head roadbed and an attachment strap arranged at the top of the bridge head roadbed, wherein the front end of the attachment strap is in lap joint with a first sinking groove arranged at the top of an abutment, the rear end of the attachment strap is in lap joint with a second sinking groove arranged at the top of a transition roadbed, fixed supports for supporting the edge positions of the attachment strap are fixed in the first sinking groove and the second sinking groove respectively, a central circular table in contact with the bottom surface of the attachment strap and a piezoelectric ring fixedly sleeved on the periphery of the central circular table are convexly arranged at the top of the fixed supports, the top surface of the piezoelectric ring is lower than the top surface of the central circular table, a gap is formed between the piezoelectric ring and the bottom surface of the attachment strap, the piezoelectric ring is electrically connected with a heating pipe pre-embedded in a sulfur mortar temporary support through a lead, the sulfur mortar temporary support is positioned at the bottom of a third sinking groove behind the attachment strap, the top of the sulfur mortar temporary support is provided with a settlement, the lower end of the sedimentation marker post is positioned in the third sedimentation groove and is connected with a spring for applying downward pressure to the sedimentation marker post, and a crushable space positioned at the periphery of all the sulfur mortar temporary supports is arranged between the lower end surface of the sedimentation marker post and the bottom surface of the third sedimentation groove.
Preferably, stepped transition contact surfaces are adopted for matching between the transition roadbed and the roadbed main body, blind ditches positioned below the butt straps penetrate through the tops of the transition roadbed and the roadbed main body, the blind ditches are obliquely arranged from front to back, and the inclination angle is 5-10 degrees.
Preferably, the bottoms of the abutment and the transition roadbed are located on a bearing support formed by pouring fiber concrete, the front end of the bearing support is fixedly connected with an abdominal arch through an inclined plane, the rear end of the bearing support extends into the roadbed main body, an upper net rack paved on a downward base is embedded in the bottom of the roadbed main body, an anchor rod inclined backwards is connected to the upper net rack in a hooked mode, and the lower end of the anchor rod extends into a lower net rack embedded in the base.
Preferably, a shockproof structure is arranged between the bridge abutment and the transition roadbed, the shockproof structure comprises shockproof plates which extend in a wave shape in the left-right direction, the wave trough sides of the shockproof plates are embedded into the front of the transition roadbed, a foaming concrete body is poured between every two adjacent wave crests in a cast-in-place mode, drain pipes filled with gravel fillers are embedded in the concave sides of the wave crests and/or the wave troughs, first water permeable holes with the diameter of 1cm-3cm are formed in the pipe walls of the drain pipes, second water permeable holes communicated with the first water permeable holes are formed in the shockproof plates, water falling holes communicated with the first water permeable holes and the second water permeable holes are formed in the bridge abutment, and the front end hole openings of the water falling holes are located in front of the bridge abutment.
Preferably, the contact transition surface of the abutment and the transition roadbed has backward inclined sections gradually inclining backward from top to bottom and forward inclined sections gradually inclining forward from top to bottom, and the forward inclined sections and the backward inclined sections are alternately distributed in the left-right direction.
The invention also aims to provide another connecting section structure of a soft soil roadbed and a bridge and culvert structure of a highway, which is convenient for controlling the settlement of the roadbed at the bridge head, and the technical scheme is as follows:
the joint section structure of the highway soft soil roadbed and the bridge and culvert structure comprises a bridge head roadbed and an attachment strap arranged at the top of the bridge head roadbed, wherein the front end of the attachment strap is in lap joint with a first sinking groove arranged at the top of a bridge abutment, the rear end of the attachment strap is in lap joint with a second sinking groove arranged at the top of a transition roadbed, fixed supports for supporting the edge positions of the attachment strap are fixed in the first sinking groove and the second sinking groove respectively, a central circular truncated cone in contact with the bottom surface of the attachment strap and a normally-open microswitch fixed on the periphery of the central circular truncated cone are convexly arranged at the top of each fixed support, the top surface of the microswitch is lower than the top surface of the central circular truncated cone, a gap is formed between the top surface of the microswitch and the bottom surface of the attachment strap, the microswitch is in conductive connection with a heating tube pre-embedded in a; the sulphur mortar temporary support is located the third heavy groove bottom in attachment strap rear, and sulphur mortar temporary support top bearing has the settlement sighting rod that stretches out from the bridgehead road surface, and the outer slip cap of settlement sighting rod is equipped with the pre-buried location sliding sleeve who fixes in the bridgehead road bed, and the lower extreme of settling sighting rod is in the third heavy inslot, and is connected with the spring that is used for exerting the holding down force to settling sighting rod, has between the tank bottom surface that is in all sulphur mortar temporary support outlying spaces of can bursting between the lower terminal surface of settling sighting rod and the third heavy groove.
Preferably, stepped transition contact surfaces are matched between the transition roadbed and the roadbed main body, blind ditches positioned below the butt straps penetrate through the tops of the transition roadbed and the roadbed main body, the blind ditches are arranged in a downward inclined mode from front to back, and the inclination angle is 5-10 degrees; the contact transition surface of the bridge abutment and the transition roadbed is provided with backward inclined sections which are gradually inclined backwards from top to bottom and forward inclined sections which are gradually inclined forwards from top to bottom, and the forward inclined sections and the backward inclined sections are alternately distributed in the left-right direction.
Preferably, the bottoms of the abutment and the transition roadbed are located on a bearing support formed by pouring fiber concrete, the front end of the bearing support is fixedly connected with an abdominal arch through an inclined plane, the rear end of the bearing support extends into the roadbed main body, an upper net rack paved on a downward base is embedded in the bottom of the roadbed main body, an anchor rod inclined backwards is connected to the upper net rack in a hooked mode, and the lower end of the anchor rod extends into a lower net rack embedded in the base.
Preferably, a shockproof structure is arranged between the bridge abutment and the transition roadbed, the shockproof structure comprises shockproof plates which extend in a wave shape in the left-right direction, the wave trough sides of the shockproof plates are embedded into the front of the transition roadbed, a foaming concrete body is poured between every two adjacent wave crests in a cast-in-place mode, drain pipes filled with gravel fillers are embedded in the concave sides of the wave crests and/or the wave troughs, first water permeable holes with the diameter of 1cm-3cm are formed in the pipe walls of the drain pipes, second water permeable holes communicated with the first water permeable holes are formed in the shockproof plates, water falling holes communicated with the first water permeable holes and the second water permeable holes are formed in the bridge abutment, and the front end hole openings of the water falling holes are located in front of the bridge abutment.
The invention also aims to provide a construction method of the connection section structure of the highway soft soil roadbed and the bridge and culvert structure, which is specially used for the connection structure, and the technical scheme is as follows:
the construction method of the connecting section structure of the soft soil roadbed and the bridge and culvert structure of the highway comprises the following steps:
s1, forming a bearing support on the CFG pile in a cast-in-place mode;
s2, sequentially building a roadbed main body, a transition roadbed and an abutment from back to front on the bearing support;
s3, leveling the base surfaces of the transition roadbed and the roadbed main body until the base surfaces are flush with the top surface of the bridge abutment;
s4, digging a first sinking groove in the front side of the top surface of the abutment, and digging a second sinking groove and a third sinking groove behind the second sinking groove on the base surface of the transition roadbed;
s5, respectively installing a fixed support and a central circular truncated cone fixed on the fixed support, a piezoelectric ring and/or a microswitch around the central circular truncated cone in the first sinking groove and the second sinking groove, wherein the top surface of the central circular truncated cone is flush with the base surface of the transition roadbed, the top surface of the piezoelectric ring and/or the microswitch is lower than the top surface of the central circular truncated cone, a sulfur mortar temporary support with a gap between the bottom of the third sinking groove and the peripheral groove wall of the groove bottom is installed at the bottom of the third sinking groove, and the top surface of the sulfur mortar temporary support is lower than the notch of the third sinking groove;
s6, erecting a butt strap between the two central circular truncated cones, installing a sedimentation marker post and a spring for downwards pressing the sedimentation marker post on the temporary sulfur mortar support, and sleeving a positioning sliding sleeve in the middle of the sedimentation marker post;
and S7, paving the road surface on the butt strap, and enabling the settlement mark post to be exposed from the upper part of the road surface.
The invention has the beneficial effects that:
when the bridge head is settled, the settlement is firstly found at the abutment position which is closer to the bridge floor, so that the butt strap is in a state of being low in front and high in back, the pressing butt strap is pressed intermittently to the piezoelectric rings or the micro switches in the first sinking groove and the second sinking groove after a vehicle is driven off from the bridge, the heating pipe is triggered by the piezoelectric rings or the micro switches, the temporary support of the sulfur mortar can be removed after the heating pipe is heated, the settlement marker post can sink under the action of the spring, the settlement of the bridge head is prompted to be over-limited, the settlement condition of the bridge head can be found in time, and the control is carried out in time.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:
FIG. 1 is a schematic view of a cross section of a joint section structure of a soft soil roadbed and a bridge and culvert structure of a highway of the invention;
fig. 2 is a schematic view of another cross section of the structure of the junction section of the soft soil roadbed and the bridge and culvert structure of the highway of the present invention;
fig. 3 is a schematic view of the contact transition between the transition subgrade and the abutment of the invention.
The reference numbers used in the drawings are as follows:
1 a roadbed main body, wherein the roadbed main body comprises a roadbed,
2, a transition roadbed is arranged in the middle of the roadbed,
3, a bridge abutment is arranged on the bridge,
4, a butt strap is arranged on the upper surface of the steel plate,
5 a first sinking groove is formed in the first sinking groove,
6 a second sinking groove is formed in the first sinking groove,
7, fixing a support saddle to the base saddle,
8, a central circular truncated cone is arranged on the circular truncated cone,
9 a piezoelectric ring is arranged on the base plate,
10 a temporary support seat of sulfur mortar,
11 a third sinking groove is arranged on the bottom of the first sinking groove,
12 a settlement post for a fishing pole, wherein,
13 positioning the sliding sleeve, and positioning the sliding sleeve,
a spring (14) is arranged in the groove,
15, a blind ditch is formed in the upper part of the ditch,
the support is carried by the support 16 and,
17 the abdominal arch of the patient,
18 is put on a net rack, and the net rack,
19 the number of anchor rods is 19,
20, the net rack is arranged below the net rack,
21 a shock-proof plate for preventing vibration,
22 a body of a foamed concrete having a foam,
23 a water discharge pipe is arranged at the position,
24 water falling holes.
Detailed Description
Example 1:
as shown in fig. 1 to 3, the connection section structure of the soft soil roadbed and the bridge and culvert structure for the highway of the embodiment includes a bridge head roadbed composed of a roadbed main body 1, a transition roadbed 2 and a bridge abutment 3 which are sequentially arranged from back to front, a butt plate 4 is installed on the top of the bridge head roadbed, the front end of the butt plate 4 is lapped on a first sinking groove 5 arranged on the top of the bridge abutment 3, the rear end of the butt plate 4 is lapped on a second sinking groove 6 arranged on the top of the transition roadbed 2, a fixed support 7 supporting the edge of the butt plate 4 is fixed in each of the first sinking groove 5 and the second sinking groove 6, a central circular table 8 contacting with the bottom surface of the butt plate 4 and a piezoelectric ring 9 fixedly sleeved on the periphery of the central circular table 8 are convexly arranged on the top of the fixed support 7, the top surface of the piezoelectric ring 9 is lower than the top surface of the central circular table 8, and a gap exists between the piezoelectric ring 9 and the bottom surface of the butt plate 4, the piezoelectric ring 9 is electrically, the sulfur mortar temporary support 10 is located the third heavy groove 11 bottom behind the attachment strap 4, the bearing of sulfur mortar temporary support 10 top has the settlement sighting rod 12 that stretches out from the bridgehead road surface, subside sighting rod 12 outer sliding sleeve and be equipped with pre-buried location sliding sleeve 13 of fixing in the bridgehead road bed, the lower extreme of subsiding sighting rod 12 is in the third heavy groove 11, and be connected with and be used for applying the spring 14 of holding down force to subsiding sighting rod 12, it can the space of bursting that all sulfur mortar temporary support 10 outlying to have between the lower terminal surface of subsiding sighting rod 12 and the tank bottom surface of third heavy groove 11.
The transition subgrade 2 and the subgrade main body 1 are matched by adopting a stepped transition contact surface, a blind ditch 15 positioned below the butt strap 4 penetrates through the tops of the transition subgrade 2 and the subgrade main body 1, the blind ditch 15 is arranged in a downward inclined mode from front to back, and the inclination angle is 5-10 degrees.
The bottoms of the abutment 3 and the transition roadbed 2 are located on a bearing support 16 formed by pouring fiber concrete, the front end of the bearing support 16 is fixedly connected with an abdominal arch 17 through an inclined plane, the rear end of the bearing support 16 extends into the roadbed main body 1, an upper net rack 18 paved on a downward base is embedded in the bottom of the roadbed main body 1, an anchor rod 19 inclining backwards is connected to the upper net rack 18 in a hooking mode, and the lower end of the anchor rod 19 extends into a lower net rack 20 embedded in the base.
A shockproof structure is arranged between the bridge abutment 3 and the transition roadbed 2, the shockproof structure comprises shockproof plates 21 extending in a wave shape in the left-right direction, the wave trough sides of the shockproof plates 21 are embedded into the front of the transition roadbed 2, foamed concrete bodies 22 are cast between two adjacent wave crests in a cast-in-place mode, drain pipes 23 filled with gravel fillers are embedded in the concave sides of the wave crests and the wave troughs, first water permeable holes with the aperture of 1cm-3cm are formed in the pipe walls of the drain pipes 23, second water permeable holes communicated with the first water permeable holes are formed in the shockproof plates 21, water falling holes 24 communicated with the first water permeable holes and the second water permeable holes are formed in the bridge abutment 3, and the front end hole mouths of the water falling holes 24 are located in front of the bridge abutment 3.
The contact transition surface of the abutment 3 and the transition roadbed 2 is provided with backward inclined sections which are gradually inclined backwards from top to bottom and forward inclined sections which are gradually inclined forwards from top to bottom, and the forward inclined sections and the backward inclined sections are alternately distributed in the left-right direction.
The construction method of the connecting section structure comprises the following steps:
s1, forming a bearing support 16 on the CFG pile 17 in a cast-in-situ mode;
s2, building the roadbed main body 1, the transition roadbed 2 and the abutment 3 on the bearing support 16 from back to front in sequence;
s3, leveling the base surfaces of the transition roadbed 2 and the roadbed main body 1 until the base surfaces are flush with the top surface of the bridge abutment 3;
s4, excavating a first sinking groove 5 on the front side of the top surface of the abutment 3, excavating a second sinking groove 6 and a third sinking groove 11 behind the second sinking groove 6 on the base surface of the transition roadbed 2;
s5, respectively installing a fixed support 7, a central circular truncated cone 8 fixed on the fixed support, and a piezoelectric ring 9 and/or a microswitch positioned around the central circular truncated cone 8 in the first sinking groove 5 and the second sinking groove 6, wherein the top surface of the central circular truncated cone 8 is flush with the base surface of the transition roadbed 2, the top surface of the piezoelectric ring 9 and/or the microswitch is lower than the top surface of the central circular truncated cone 8, the bottom of the third sinking groove 11 is provided with a sulfur mortar temporary support 10 with a gap between the bottom of the groove and the peripheral groove wall of the groove bottom, and the top surface of the sulfur mortar temporary support 10 is lower than the notch of the third sinking groove 11;
s6, erecting a butt strap 4 between two central circular truncated cones 8, installing a sedimentation marker post 12 and a spring 14 for pressing the sedimentation marker post 12 downwards on a sulfur mortar temporary support 10, and sleeving a positioning sliding sleeve 13 in the middle of the sedimentation marker post 12;
s7, the pavement is laid on the butt strap 4, and the sinker pole 12 is exposed from above the pavement.
Example 2:
this example differs from example 1 in that:
the top of the fixed support is convexly provided with a central circular truncated cone which is in contact with the bottom surface of the butt strap and a normally-open micro switch which is fixed on the periphery of the central circular truncated cone, the top surface of the micro switch is lower than that of the central circular truncated cone, a gap exists between the micro switch and the bottom surface of the butt strap, the micro switch is in conductive connection with a pre-buried heating tube in the temporary sulfur mortar support through a lead, and a loop where the heating tube and the micro switch are located is connected with a mains supply.
Claims (10)
1. Highway soft soil roadbed and bridging structure's linking section structure, the access slab that sets up including bridgehead roadbed and top, characterized by: the front end of the butt strap is lapped at a first sinking groove arranged at the top of the abutment, the rear end of the butt strap is lapped at a second sinking groove arranged at the top of the transition roadbed, fixed supports for supporting the edge positions of the butt strap are fixed in the first sinking groove and the second sinking groove, a central round platform in contact with the bottom surface of the butt strap and a piezoelectric ring fixedly arranged at the periphery of the central round platform are convexly arranged at the top of the fixed supports, the top surface of the piezoelectric ring is lower than the top surface of the central round platform, a gap is formed between the piezoelectric ring and the bottom surface of the butt strap, the piezoelectric ring is in conductive connection with a heating pipe pre-embedded in a sulfur mortar temporary support through a lead, the sulfur mortar temporary support is positioned at the bottom of a third sinking groove behind the butt strap, a settlement mark rod extending from the bridge head pavement is supported at the top of the sulfur mortar temporary support, a positioning sliding sleeve pre-embedded and fixed in the bridge head roadbed is sleeved outside the settlement mark, And a spring for applying downward force to the sedimentation marker post is connected, and a crushable space positioned at the periphery of all the sulfur mortar temporary supports is arranged between the lower end surface of the sedimentation marker post and the bottom surface of the third sedimentation tank.
2. The joint section structure of the soft soil roadbed and the bridge and culvert structure of the highway according to claim 1, which is characterized in that: the transition roadbed and the roadbed main body are matched by adopting a stepped transition contact surface, and a blind ditch positioned below the butt strap penetrates through the tops of the transition roadbed and the roadbed main body, the blind ditch is downwards inclined from front to back, and the inclination angle is 5-10 degrees.
3. The joint section structure of the soft soil roadbed and the bridge and culvert structure of the highway according to claim 1, which is characterized in that: the bottom of abutment and transition road bed is located on the bearing support that fibre concrete poured and form, and the front end that bears the support passes through inclined plane and abdominal arch fixed connection, and the rear end that bears the support stretches into in the road bed main part to in the pre-buried last rack of laying on the base of transferring of bottom of road bed main part, the hook is connected with the stock that inclines backward on the last rack, the lower extreme of stock stretches into in the pre-buried lower rack in the base.
4. The jointed segment structure of the soft soil roadbed and the bridge and culvert structure of the highway according to any one of claims 1-3, characterized in that: the anti-vibration structure is arranged between the bridge abutment and the transition roadbed and comprises anti-vibration plates extending in a wave shape in the left and right directions, the trough sides of the anti-vibration plates are embedded into the front of the transition roadbed, foamed concrete bodies are poured between every two adjacent wave crests in a cast-in-place mode, in addition, drain pipes filled with gravel fillers are arranged on the inner concave sides of the wave crests and/or the wave troughs, first water permeable holes with the aperture of 1cm-3cm are formed in the pipe walls of the drain pipes, second water permeable holes communicated with the first water permeable holes are formed in the anti-vibration plates, water falling holes communicated with the first water permeable holes and the second water permeable holes are formed in the bridge abutment, and the front end hole openings of the water falling holes are positioned in the front of the bridge.
5. The jointed segment structure of the soft soil roadbed and the bridge and culvert structure of the highway according to any one of claims 1-3, characterized in that: the contact transition surface of the bridge abutment and the transition roadbed is provided with backward inclined sections which are gradually inclined backwards from top to bottom and forward inclined sections which are gradually inclined forwards from top to bottom, and the forward inclined sections and the backward inclined sections are alternately distributed in the left-right direction.
6. Highway soft soil roadbed and bridging structure's linking section structure, the access slab that sets up including bridgehead roadbed and top, characterized by: the front end of the butt strap is lapped at a first sinking groove arranged at the top of the abutment, the rear end of the butt strap is lapped at a second sinking groove arranged at the top of the transition roadbed, fixed supports bearing the edge positions of the butt strap are fixed in the first sinking groove and the second sinking groove, a central circular truncated cone in contact with the bottom surface of the butt strap and a normally-open microswitch fixed on the periphery of the central circular truncated cone are convexly arranged at the top of each fixed support, the top surface of the microswitch is lower than the top surface of the central circular truncated cone, a gap is reserved between the top surface of the microswitch and the bottom surface of the butt strap, the microswitch is electrically connected with a heating tube pre-buried in a sulfur mortar temporary support through a lead wire, and a loop where the heating tube and the microswitch are located; the sulphur mortar temporary support is located the third heavy groove bottom in attachment strap rear, and sulphur mortar temporary support top bearing has the settlement sighting rod that stretches out from the bridgehead road surface, and the outer slip cap of settlement sighting rod is equipped with the pre-buried location sliding sleeve who fixes in the bridgehead road bed, and the lower extreme of settling sighting rod is in the third heavy inslot, and is connected with the spring that is used for exerting the holding down force to settling sighting rod, has between the tank bottom surface that is in all sulphur mortar temporary support outlying spaces of can bursting between the lower terminal surface of settling sighting rod and the third heavy groove.
7. The joint section structure of the soft soil roadbed and the bridge and culvert structure of the highway according to claim 6, characterized in that: the transition subgrade and the subgrade main body are matched by adopting a stepped transition contact surface, blind ditches positioned below the butt strap penetrate through the tops of the transition subgrade and the subgrade main body, the blind ditches are arranged in a downward inclined mode from front to back, and the inclination angle is 5-10 degrees; the contact transition surface of the bridge abutment and the transition roadbed is provided with backward inclined sections which are gradually inclined backwards from top to bottom and forward inclined sections which are gradually inclined forwards from top to bottom, and the forward inclined sections and the backward inclined sections are alternately distributed in the left-right direction.
8. The joint section structure of the soft soil roadbed and the bridge and culvert structure of the highway according to claim 6, characterized in that: the bottom of abutment and transition road bed is located on the bearing support that fibre concrete poured and form, and the front end that bears the support passes through inclined plane and abdominal arch fixed connection, and the rear end that bears the support stretches into in the road bed main part to in the pre-buried last rack of laying on the base of transferring of bottom of road bed main part, the hook is connected with the stock that inclines backward on the last rack, the lower extreme of stock stretches into in the pre-buried lower rack in the base.
9. The jointed segment structure of the soft soil roadbed and the bridge and culvert structure of the highway according to any one of claims 6-8, characterized in that: the anti-vibration structure is arranged between the bridge abutment and the transition roadbed and comprises anti-vibration plates extending in a wave shape in the left and right directions, the trough sides of the anti-vibration plates are embedded into the front of the transition roadbed, foamed concrete bodies are poured between every two adjacent wave crests in a cast-in-place mode, in addition, drain pipes filled with gravel fillers are arranged on the inner concave sides of the wave crests and/or the wave troughs, first water permeable holes with the aperture of 1cm-3cm are formed in the pipe walls of the drain pipes, second water permeable holes communicated with the first water permeable holes are formed in the anti-vibration plates, water falling holes communicated with the first water permeable holes and the second water permeable holes are formed in the bridge abutment, and the front end hole openings of the water falling holes are positioned in the front of the bridge.
10. A construction method for a connection section structure of a soft soil roadbed and a bridge and culvert structure of a highway is characterized by comprising the following steps:
s1, forming a bearing support on the CFG pile in a cast-in-place mode;
s2, sequentially building a roadbed main body, a transition roadbed and an abutment from back to front on the bearing support;
s3, leveling the base surfaces of the transition roadbed and the roadbed main body until the base surfaces are flush with the top surface of the bridge abutment;
s4, digging a first sinking groove in the front side of the top surface of the abutment, and digging a second sinking groove and a third sinking groove behind the second sinking groove on the base surface of the transition roadbed;
s5, respectively installing a fixed support and a central circular truncated cone fixed on the fixed support, a piezoelectric ring and/or a microswitch around the central circular truncated cone in a first sinking groove and a second sinking groove, wherein the top surface of the central circular truncated cone is flush with the base surface of a transition roadbed, the top surface of the piezoelectric ring and/or the microswitch is lower than that of the central circular truncated cone, a sulfur mortar temporary support with a gap between the bottom of a third sinking groove and the peripheral groove wall of the groove bottom is installed at the bottom of the third sinking groove, the top surface of the sulfur mortar temporary support is lower than the notch of the third sinking groove, and the piezoelectric ring is electrically connected with a heating tube pre-embedded in the sulfur mortar temporary support through a lead wire and/or the microswitch is electrically connected in series with a heating tube pre-embedded in the sulfur mortar;
s6, erecting a butt strap between the two central circular truncated cones, installing a sedimentation marker post and a spring for downwards pressing the sedimentation marker post on the temporary sulfur mortar support, and sleeving a positioning sliding sleeve in the middle of the sedimentation marker post;
and S7, paving the road surface on the butt strap, and enabling the settlement mark post to be exposed from the upper part of the road surface.
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