CN111691311B - Construction method for bridge pier prefabricated splicing type viaduct - Google Patents
Construction method for bridge pier prefabricated splicing type viaduct Download PDFInfo
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- CN111691311B CN111691311B CN202010644157.3A CN202010644157A CN111691311B CN 111691311 B CN111691311 B CN 111691311B CN 202010644157 A CN202010644157 A CN 202010644157A CN 111691311 B CN111691311 B CN 111691311B
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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
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
Abstract
The invention relates to a construction method of a bridge pier prefabricated splicing viaduct, which comprises the steps of building a plurality of bridge piers, building a bridge deck on the bridge piers, and specifically building the bridge piers, wherein the specific process comprises the steps of pouring a section positioned at the bottom in a construction site, overlapping a first prefabricated section on the section positioned at the bottom to increase the height of the bridge piers, overlapping a second prefabricated section on the first prefabricated section to increase the height of the bridge piers, repeating the steps to increase the height of the bridge piers to meet the protection requirement, and connecting the adjacent sections together through a plurality of splicing structures. The invention has the advantage of shortening the construction period and solves the problems of long construction period and inconvenience in building the formwork support frame when the bridge pier of the existing viaduct is of a cast-in-place structure and the bridge pier is high.
Description
Technical Field
The invention relates to the technical field of bridge road construction, in particular to a construction method of a bridge pier prefabricated splicing type viaduct.
Background
Can often build the viaduct in the capital construction work progress, the viaduct includes the pier and supports the decking on the pier, some supports some for the directness of the support of decking, some supports the decking for setting up the crossbeam on the pier, no matter how high of current pier, all form for upwards pouring in proper order from the following, also the pier all is cast-in-place, cast-in-place mode not only leads to the construction cycle long, it is very inconvenient to build the template support frame that supports fixed die plate when the pier is high moreover.
Disclosure of Invention
The invention provides a construction method of a pier prefabricated spliced viaduct, which can shorten the construction period and solve the problems that the construction period is long when the pier of the existing viaduct is a cast-in-place structure and the construction of a formwork support frame is inconvenient.
The technical problem is solved by the following technical scheme: the utility model provides a prefabricated concatenation formula overpass building method of pier, builds a plurality of piers, builds the bridge slab on the pier, and the concrete process of building the pier does, pours the segmentation that is located the bottommost at the job site, overlaps the high increase that realizes the pier on the segmentation of first prefabricated, overlaps the segmentation of second prefabricated again and realizes the high increase of pier on the segmentation of first prefabricated, analogizes in proper order and increases the height of pier to the protection requirement, and is adjacent link together through a plurality of grafting structure between the segmentation. According to the technical scheme, the bridge pier is prefabricated by multiple sections and then is formed by hoisting and splicing on site, so that the construction period can be shortened and a template does not need to be built.
Preferably, the plug structure comprises a lower steel thread head cast on the upper end surface of the section positioned below and an upper steel thread head cast on the lower end surface of the section positioned above, the lower steel thread head is in threaded connection with the steel inner thread sleeve, the upper end face of the steel internal thread sleeve is provided with a steel connecting cylinder, the upper steel thread head is in threaded connection with a connecting steel sleeve, the steel connecting cylinder is provided with a steel chuck, a clamping ring groove extending along the circumferential direction of the steel connecting cylinder is formed between the steel chuck and the steel connecting cylinder, a plurality of inclined bottom chutes axially extending along the circumferential direction of the connecting steel sleeve are arranged on the inner circumferential surface of the connecting steel sleeve, the bottom wall of the inclined bottom sliding chute inclines from the upper end towards the direction that the outer peripheral surface of the connecting steel sleeve is closed, the inclined bottom sliding chute is connected with the steel barbs in a sliding mode, and barb downward moving springs for driving all the steel barbs to slide downward are arranged in the connecting steel sleeve; the method for connecting adjacent segments together by the splicing structure comprises the following steps: and descending the section positioned above so that the connecting steel sleeve is arranged on the steel connecting cylinder until the steel barb is hooked in the clamping ring groove. Provides a specific technical scheme of the plug-in structure. The splicing mechanism in the technical scheme is characterized in that the steel barbs are separated through the spring back to enable the steel clamping discs to penetrate through the steel barbs, and then the steel barbs reset under the driving action of the spring and are clamped in the clamping ring grooves, so that the steel barbs can be hooked in a closed space. Avoidance in the hooking process is not completed through elastic deformation of the steel barb, so that the driving of the steel barb and the clamping ring groove can be designed to be high in strength to meet the connection requirement of a high bridge.
Preferably, each of the splicing structures is provided with a hooking in-place detection mechanism, the hooking in-place detection mechanism comprises a vertical sliding hole which is arranged in the steel connecting cylinder and extends into the steel disc, an insulating cylinder which is arranged at the lower end of the vertical sliding hole and has an opening at the upper end, a conductive post which is slidably connected in the vertical sliding hole, a plurality of horizontal sliding holes which are distributed along the circumferential direction of the steel disc and extend in the radial direction and are communicated with the vertical sliding hole, a horizontal sliding pin which is arranged in the horizontal sliding hole in a penetrating manner, and two wiring through holes which penetrate through the insulating cylinder, wherein the conductive post is provided with a permanent magnet which enables the conductive post to be suspended in the vertical sliding hole and keep contact with the horizontal sliding pin; the process of splicing the segments together is as follows: firstly, stripping the insulating skins at the end parts of two power wires with the insulating skins to enable the core wires to form a section of exposed section, inserting the two power wires into the two wiring through holes one by one until the exposed sections of the core wires are all positioned on the insulating cylinder, connecting one pin of the indicator lamp with the same power wire, connecting the other pin with one end of the power supply, and connecting the other end of the power supply with the other power wire; then the upper section moves downwards to enable the connecting steel sleeve to be sleeved on the steel connecting cylinder, if the steel barb is hooked into the clamping ring groove, the steel clamping disc passes by the steel barb, the steel barb extrudes to the arc-shaped pressed section of the horizontal sliding pin in the passing process to enable the horizontal sliding pin to shrink towards the inside of the steel clamping disc, the horizontal sliding pin drives the conductive column to move downwards to press to the exposed sections of the core wires of the two power lines, so that the indicator lamp is connected with the power supply to be lightened, namely when the indicator lamp is lightened, the corresponding inserting structure is assembled in place. The technical scheme for judging whether the plug-in structure is assembled in place is provided. This technical scheme is under the effect of permanent magnet, avoids leading to the erroneous judgement that presses the power cord promptly when leading electrical pillar not receiving the pushing down effect of horizontal sliding pin.
Preferably, a connection column part reversing surface for converting horizontal movement into vertical movement is arranged between the upper end of the conductive column and the inner end of the horizontal sliding pin. The reliability of the horizontal sliding pin driving the conductive column to move downwards can be improved.
Preferably, an insulating partition plate is arranged in the insulating cylinder, and the two wiring through holes are distributed on two sides of the insulating partition plate. The power line can be prevented from being conducted without being pressed by the conductive column after being inserted into the insulating sleeve. Erroneous judgment can be avoided.
Preferably, the upper end face of the steel internal thread sleeve is provided with a wiring groove which penetrates through the peripheral face of the steel internal thread sleeve and is in butt joint with the wiring through hole, the steel connecting cylinder is inserted into the connecting steel sleeve, then the power line is pulled out, then bonding slurry is injected into the wiring groove to be filled into the connecting steel sleeve, and the steel connecting cylinder and the steel barb are fixed with the connecting steel sleeve after the bonding slurry is solidified. The stability and reliability during connection can be improved, and the wiring groove has the effect of one object for two purposes.
Preferably, the circumferential surface of the steel chuck is provided with an annular avoidance groove extending along the circumferential direction of the steel chuck, the horizontal sliding hole is arranged in the annular avoidance groove, and the outer end of the horizontal sliding pin is provided with an arc-shaped pressed section which can be contracted into the annular avoidance groove and extends along the circumferential direction of the steel chuck; during assembly, the steel barb presses the arc-shaped pressed section to enable the horizontal sliding pin to move inwards to drive the conductive column to descend. The reliability of the horizontal sliding pin extruded by the steel barb in the assembling process can be improved.
Preferably, the peripheral surface of the conductive column is provided with a bolt hole, the hole wall of the vertical sliding hole is provided with a counter bore, and a bolt ejection spring for driving the bolt to move outwards are arranged in the counter bore; when the steel chuck moves upwards and the steel barb is pressed to the horizontal sliding pin in the process of passing through the steel barb, the horizontal sliding pin drives the conductive column to move downwards, and the plug pin is inserted into the plug pin hole when the conductive column moves downwards to the limit position. This technical scheme makes when the steel chuck crosses the steel barb, though lead electrical pillar and not receive the extrusion but still can keep pressing and keep reliable switch-on between pilot lamp and the power when two power cords and make the pilot lamp continuously luminous to avoid the pilot lamp to give out light and lead to judging inconveniently for only the steel chuck crosses the short period of barb.
Preferably, a barb part guide surface for guiding the steel barb to move outwards along the radial direction of the connecting steel sleeve when the steel chuck is inserted between the steel barbs is arranged between the lower end surface of the steel barb and the side surface far away from the bottom surface of the inclined bottom sliding chute. The steel barbs can be reliably driven apart during insertion.
Preferably, the lower end of the inclined bottom chute is of a closed structure, and the upper end of the inclined bottom chute is of an open structure. During the assembly, the clamping block is inserted from the open end of the inclined bottom sliding groove, so that the steel barb is convenient to install. The steel barb is connected with the steel sleeve after being assembled and then is connected to the upper steel thread head through threads. Not only is the steel barb assembled conveniently, but also the steel barb can not fall off.
Preferably, the upper end of the connecting steel sleeve is provided with a large-diameter section, the inner surface of the large-diameter section is provided with threads, and the connecting steel sleeve is in threaded connection with the upper steel thread head through the threads. The strength of the connecting steel sleeve can be improved.
Preferably, the steel barb is provided with a blocking section which is positioned at the periphery of the barb downward moving spring. The steel barb can be prevented from being excessively folded by the barb downward moving spring so as to cause the steel barb to be separated from the connecting steel sleeve before assembling.
The invention has the following beneficial effects: prefabricating and manufacturing the bridge pier, so that the construction period of the viaduct can be shortened; the structural strength of the joint can be designed to meet the high-strength connection requirement; it can be known whether the steel barb is hooked up.
Drawings
FIG. 1 is a schematic view of a viaduct fabricated according to a first embodiment of the present invention;
FIG. 2 is a schematic diagram of a plugging structure;
FIG. 3 is an enlarged view of a portion of FIG. 2 at A;
FIG. 4 is a schematic cross-sectional view B-B of FIG. 2;
fig. 5 is a partial schematic view of the plugging structure in the second embodiment.
In the figure: the bridge pier comprises a bridge pier 1, a bridge deck 2, a subsection 3, a ground 4, a splicing structure 5, a lower steel threaded head 6, an upper steel threaded head 7, a steel internal thread sleeve 8, a steel connecting cylinder 9, a connecting steel sleeve 10, a steel chuck 11, a clamping ring groove 12, an inclined bottom sliding groove 13, a bottom wall 14 of the inclined bottom sliding groove, a steel barb 15, a barb part guide surface 16, a large diameter section 17, a lower end 18 of the inclined bottom sliding groove, a barb downward moving spring 19, a blocking section 20, a vertical sliding hole 21, an insulating cylinder 22, a conductive post 23, a horizontal sliding hole 24, a horizontal sliding pin 25, a wiring through hole 40, a conical head 26, a connecting post reversing surface 41, an insulating partition plate 27, a wiring groove 28, an annular avoiding groove 29, an arc-shaped section 30, a plug hole 31, a plug 32, a plug ejecting spring 33, an insulating skin 34, a power line 35, an exposed section 42, an exhaust hole 36, an upper lifting spring 37, a core wire 38 and a bottommost subsection 39.
Detailed Description
The invention is further described with reference to the following figures and examples.
The first embodiment of the invention is shown in fig. 1 to 4, and a bridge pier prefabricating and splicing type viaduct building method is characterized in that a plurality of bridge piers 1 are built, bridge decks 2 are built on the bridge piers, and the specific process of building the bridge piers is that sections 39 located at the bottom are cast on the ground 4 of a construction site in situ, a first prefabricated section 3 is overlapped on the section at the bottom to increase the height of the bridge piers, a second prefabricated section is overlapped on the first prefabricated section to increase the height of the bridge piers, the rest is done in sequence to increase the height of the bridge piers to meet the protection requirement, and the adjacent sections are connected together through a plurality of inserting structures 5. All sections are of reinforced concrete construction. The splicing structure comprises a plurality of lower steel thread heads 6 cast on the upper end surface of the section positioned below and a plurality of upper steel thread heads 7 cast on the lower end surface of the section positioned above, and the lower steel thread heads are in threaded connection in a steel internal thread sleeve 8. And a steel connecting cylinder 9 is arranged on the upper end face of the steel internal thread sleeve. The upper steel thread head is in threaded connection with a connecting steel sleeve 10. The upper end of the connecting steel sleeve is provided with a large-diameter section 17, the inner surface of the large-diameter section is provided with threads, and the connecting steel sleeve is connected with the upper steel thread head through the threads. The steel connecting cylinder is arranged in the connecting steel sleeve in a penetrating way. The steel connecting cylinder is provided with a steel chuck 11. A clamping ring groove 12 extending along the circumferential direction of the steel connecting cylinder is formed between the steel chuck and the steel connecting cylinder. The inner peripheral surface of the connecting steel sleeve is provided with a plurality of inclined bottom chutes 13 axially extending along the circumferential direction of the connecting steel sleeve. The bottom wall 14 of the inclined bottom chute is inclined in the direction in which the upper end is drawn toward the outer peripheral surface of the connecting steel sleeve. The lower end 18 of the chute is closed and the upper end is open. And a steel barb 15 is connected in the inclined bottom chute in a sliding way. And a barb part guide surface 16 which guides the steel barb to move outwards along the radial direction of the connecting steel sleeve when the steel chuck is inserted between the steel barbs is arranged between the lower end surface of the steel barb and the side surface of one side far away from the bottom surface of the inclined bottom sliding chute. And a barb downward moving spring 19 for driving all the steel barbs to slide downward is arranged in the connecting steel sleeve. The steel barb is provided with a catch section 20 located on the periphery of the barb displacing spring downward. The steel barb hooks in the clamping ring groove.
The invention is also provided with a hooking in-place detection mechanism for detecting whether the steel barb is hooked into the clamping ring groove. The hooking in-place detection mechanism comprises a vertical sliding hole 21 which is arranged in the steel connecting cylinder and extends into the steel disc, an insulating cylinder 22 which is positioned at the lower end of the vertical sliding hole and has an opening at the upper end, a conductive column 23 which is connected in the vertical sliding hole in a sliding manner, a plurality of horizontal sliding holes 24 which are distributed along the circumferential direction of the steel disc and extend radially and are communicated with the vertical sliding hole in the steel disc, a horizontal sliding pin 25 which is arranged in the horizontal sliding hole in a penetrating manner, and two wiring through holes 40 which penetrate through the insulating cylinder. The conductive column is provided with a conical head 26 which is made of a permanent magnet, and the conical head is adsorbed on the horizontal sliding pin so that the conductive column is suspended in the vertical sliding hole and keeps contact with the horizontal sliding pin. The circumferential surface of the cone head constitutes a column part commutation surface 41 which converts horizontal movement into vertical movement. An insulating partition plate 27 is arranged in the insulating cylinder. Two wiring through holes are distributed on two sides of the insulating partition plate. And a wiring groove 28 which runs through the peripheral surface of the steel internal thread sleeve and is connected with the wiring through hole is arranged on the upper end surface of the steel internal thread sleeve, and a steel connecting cylinder is inserted into the connecting steel sleeve and then is filled with bonding slurry through the wiring groove. The circumferential surface of the steel chuck is provided with an annular avoidance groove 29 extending along the circumferential direction of the steel chuck. The horizontal sliding hole is arranged in the annular avoidance groove. The outer end of the horizontal sliding pin is provided with an arc-shaped pressed section 30 which can be contracted into the annular avoidance groove and extends along the circumferential direction of the steel chuck. The peripheral surface of the conductive column is provided with a pin hole 31. The hole wall of the vertical sliding hole is provided with a counter bore. A bolt 32 and a bolt ejection spring 33 for driving the bolt to move outwards are arranged in the counter bore.
In the assembling process: the insulating skin of the end parts of the two power lines 35 with the insulating skin 34 is stripped to enable the core lines 38 to form a section of exposed section 42, the two power lines are inserted into the two wiring through holes in a one-to-one correspondence mode until the exposed sections of the core lines are all located on the insulating cylinder, one pin of the indicator lamp is connected with the same power line, the other pin of the indicator lamp is connected with one end of the power supply, and the other end of the power supply is connected with the other power line. Then the upper section is moved downwards to enable the connecting steel sleeve to be sleeved on the steel connecting cylinder, if the steel barb is hooked into the clamping ring groove, the steel clamping disc can pass by the steel barb, the steel barb is extruded to the arc-shaped pressed section of the horizontal sliding pin in the passing process to enable the horizontal sliding pin to shrink towards the inside of the steel clamping disc, the horizontal sliding pin drives the conductive column to move downwards to press the exposed sections 42 of the core wires of the two power lines, so that the indicator lamp is communicated with the power supply, at the moment, the conductive column moves downwards to the limit position, the pin is inserted into the pin hole, the conductive column cannot move upwards, and the indicator lamp is bright. That is, the indicator light is on to indicate that the assembly is in place, and if the indicator light is not on, the assembly is not in place. After the power line is assembled, the power line is pulled out, bonding slurry such as cement slurry is injected into the connecting steel sleeve through the wiring groove, and in order to improve the smoothness of grouting, an exhaust hole 36 which is positioned above the steel chuck and below the upper steel thread head is arranged on the connecting steel sleeve. And after the cement paste is cured, fixing the steel connecting cylinder and the steel barb together with the connecting steel sleeve.
The second embodiment is different from the first embodiment in that:
the mode of keeping the conductive column in contact with the horizontal sliding pin is as follows: an uplifting spring 37 supported on the lower end face of the conductive column is arranged in the vertical sliding hole, the lower end of the uplifting spring is supported on the insulating sleeve, and the uplifting spring enables the conductive column to be in contact with the horizontal sliding pin.
Claims (8)
1. A bridge pier prefabricated splicing viaduct building method is used for building a plurality of bridge piers and building bridge slabs on the bridge piers, and is characterized in that the specific process of building the bridge piers comprises the steps of pouring a section positioned at the bottom in a construction site, overlapping a first prefabricated section on the section positioned at the bottom to increase the height of the bridge piers, overlapping a second prefabricated section on the first prefabricated section to increase the height of the bridge piers, repeating the above steps to increase the height of the bridge piers to meet the protection requirement, connecting adjacent sections together through a plurality of splicing structures, each splicing structure comprises a lower steel thread head poured on the upper end face of a section positioned below and an upper steel thread head poured on the lower end face of a section positioned above, the lower steel thread heads are in threaded connection in a steel internal thread sleeve, and a steel connecting cylinder is arranged on the upper end face of the steel internal thread sleeve, the upper steel thread head is in threaded connection with a connecting steel sleeve, the steel connecting cylinder is provided with a steel chuck, a clamping ring groove extending along the circumferential direction of the steel connecting cylinder is formed between the steel chuck and the steel connecting cylinder, the inner circumferential surface of the connecting steel sleeve is provided with a plurality of inclined bottom chutes axially extending along the circumferential direction of the connecting steel sleeve, the bottom walls of the inclined bottom chutes incline in the direction that the upper ends of the inclined bottom chutes are close to the outer circumferential surface of the connecting steel sleeve, steel barbs are connected in the inclined bottom chutes in a sliding manner, and barb downward moving springs for driving all the steel barbs to slide downward are arranged in the connecting steel sleeve; the method for connecting adjacent segments together by the splicing structure comprises the following steps: descending the upper section so that the connecting steel sleeve is sleeved on the steel connecting cylinder and hooked in the clamping ring groove through the steel barb, wherein each splicing structure is provided with a hooking in-place detection mechanism, each hooking in-place detection mechanism comprises a vertical sliding hole, an insulating cylinder, a conductive post, a plurality of horizontal sliding holes, a horizontal sliding pin and two wiring through holes, the vertical sliding hole is arranged in the steel connecting cylinder and extends into the steel disc, the insulating cylinder is arranged at the lower end of the vertical sliding hole, the upper end of the insulating cylinder is provided with an opening, the conductive post is connected in the vertical sliding hole in a sliding mode, the horizontal sliding holes are distributed in the steel disc in the circumferential direction and extend in the radial direction of the steel disc and are communicated with the vertical sliding hole, the horizontal sliding pin penetrates through the horizontal sliding hole and the two wiring through holes penetrate through the insulating cylinder, and the permanent magnet is arranged on the conductive post and is hung in the vertical sliding hole and is in contact with the horizontal sliding pin; the process of splicing the segments together is as follows: firstly, stripping the insulating skins at the end parts of two power wires with the insulating skins to enable the core wires to form a section of exposed section, inserting the two power wires into the two wiring through holes one by one until the exposed sections of the core wires are all positioned on the insulating cylinder, connecting one pin of the indicator lamp with the same power wire, connecting the other pin with one end of the power supply, and connecting the other end of the power supply with the other power wire; then the upper section moves downwards to enable the connecting steel sleeve to be sleeved on the steel connecting cylinder, if the steel barb is hooked into the clamping ring groove, the steel clamping disc passes by the steel barb, the steel barb is extruded to the arc-shaped extrusion section of the horizontal sliding pin in the passing process to enable the horizontal sliding pin to shrink towards the inside of the steel clamping disc, the horizontal sliding pin drives the conductive column to move downwards to press to the exposed sections of the core wires of the two power lines, so that the indicator lamp is connected with the power supply to be lightened, namely when the indicator lamp is lightened, the corresponding inserting structure is assembled in place.
2. The method for constructing a pier-prefabricated spliced viaduct as claimed in claim 1, wherein a connection column part reversing surface for converting horizontal movement into vertical movement is provided between the upper end of the conductive column and the inner end of the horizontal sliding pin.
3. The construction method of the pier-prefabricating and splicing type viaduct of claim 1, wherein an insulating partition plate is arranged in the insulating cylinder, and the two wiring through holes are distributed on two sides of the insulating partition plate.
4. The construction method of the pier-prefabricating and splicing type viaduct according to claim 1, wherein a wiring groove which penetrates through the outer peripheral surface of the steel internal thread bushing and is butted with the wiring through hole is formed in the upper end surface of the steel internal thread bushing, the steel connecting cylinder is inserted into the connecting steel bushing, the power line is pulled out, then bonding slurry is injected through the wiring groove and filled into the connecting steel bushing, and the steel connecting cylinder and the steel barb are fixed with the connecting steel bushing after the bonding slurry is solidified.
5. The construction method of the pier-prefabricating and splicing type viaduct according to claim 1, wherein an annular avoidance groove extending along the circumferential direction of the steel chuck is formed in the circumferential surface of the steel chuck, the horizontal sliding hole is formed in the annular avoidance groove, and an arc-shaped pressed section extending along the circumferential direction of the steel chuck and capable of being retracted into the annular avoidance groove is formed in the outer end of the horizontal sliding pin; during assembly, the steel barb presses the arc-shaped pressed section to enable the horizontal sliding pin to move inwards to drive the conductive column to descend.
6. The construction method of the pier-prefabricating and splicing type viaduct according to claim 1, wherein bolt holes are formed in the circumferential surface of the conductive column, counter bores are formed in the wall of the vertical sliding hole, and bolts and bolt ejecting springs for driving the bolts to move outwards are arranged in the counter bores; when the steel chuck moves upwards and the steel barb is pressed to the horizontal sliding pin in the process of passing through the steel barb, the horizontal sliding pin drives the conductive column to move downwards, and the plug pin is inserted into the plug pin hole when the conductive column moves downwards to the limit position.
7. The construction method of the pier-prefabricating and splicing type viaduct of claim 1, wherein a barbed portion guide surface is arranged between the lower end surface of the steel barb and the side surface of the side far away from the bottom surface of the inclined bottom sliding groove, and when the steel chuck is inserted between the steel barbs, the steel chuck is in contact with the barbed portion guide surface to generate reversing so that the steel barb moves outwards in the radial direction of the connecting steel sleeve.
8. The construction method of the pier-prefabricating and splicing type viaduct of claim 1, wherein the steel barb is provided with a blocking section located on the periphery of a barb downward-moving spring.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010644157.3A CN111691311B (en) | 2020-07-07 | 2020-07-07 | Construction method for bridge pier prefabricated splicing type viaduct |
| CN202110765648.8A CN113481854A (en) | 2020-07-07 | 2020-07-07 | Pier prefabricated splicing type viaduct building method capable of shortening construction period |
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| CN202010644157.3A CN111691311B (en) | 2020-07-07 | 2020-07-07 | Construction method for bridge pier prefabricated splicing type viaduct |
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| CN202110765648.8A Division CN113481854A (en) | 2020-07-07 | 2020-07-07 | Pier prefabricated splicing type viaduct building method capable of shortening construction period |
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| CN111691311B true CN111691311B (en) | 2021-09-14 |
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| CN202010644157.3A Active CN111691311B (en) | 2020-07-07 | 2020-07-07 | Construction method for bridge pier prefabricated splicing type viaduct |
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| CN113833310A (en) * | 2021-08-31 | 2021-12-24 | 浙江理工大学 | Telescopic support frame for assembled concrete laminated slab |
| CN113833311A (en) * | 2021-08-31 | 2021-12-24 | 浙江理工大学 | Vertical supporting structure of telescopic supporting frame for assembled concrete laminated slab |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN113481854A (en) | 2021-10-08 |
| CN111691311A (en) | 2020-09-22 |
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